F: Documentation/driver-api/generic-counter.rst
F: drivers/counter/
F: include/linux/counter.h
-F: include/linux/counter_enum.h
CP2615 I2C DRIVER
M: Bence Csókás <bence98@sch.bme.hu>
}
static int quad8_count_read(struct counter_device *counter,
- struct counter_count *count, unsigned long *val)
+ struct counter_count *count, u64 *val)
{
struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
}
static int quad8_count_write(struct counter_device *counter,
- struct counter_count *count, unsigned long val)
+ struct counter_count *count, u64 val)
{
struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
return 0;
}
-enum quad8_count_function {
- QUAD8_COUNT_FUNCTION_PULSE_DIRECTION = 0,
- QUAD8_COUNT_FUNCTION_QUADRATURE_X1,
- QUAD8_COUNT_FUNCTION_QUADRATURE_X2,
- QUAD8_COUNT_FUNCTION_QUADRATURE_X4
-};
-
static const enum counter_function quad8_count_functions_list[] = {
- [QUAD8_COUNT_FUNCTION_PULSE_DIRECTION] = COUNTER_FUNCTION_PULSE_DIRECTION,
- [QUAD8_COUNT_FUNCTION_QUADRATURE_X1] = COUNTER_FUNCTION_QUADRATURE_X1_A,
- [QUAD8_COUNT_FUNCTION_QUADRATURE_X2] = COUNTER_FUNCTION_QUADRATURE_X2_A,
- [QUAD8_COUNT_FUNCTION_QUADRATURE_X4] = COUNTER_FUNCTION_QUADRATURE_X4
+ COUNTER_FUNCTION_PULSE_DIRECTION,
+ COUNTER_FUNCTION_QUADRATURE_X1_A,
+ COUNTER_FUNCTION_QUADRATURE_X2_A,
+ COUNTER_FUNCTION_QUADRATURE_X4,
};
-static int quad8_function_get(struct counter_device *counter,
- struct counter_count *count, size_t *function)
+static int quad8_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
struct quad8 *const priv = counter->priv;
const int id = count->id;
if (priv->quadrature_mode[id])
switch (priv->quadrature_scale[id]) {
case 0:
- *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X1;
+ *function = COUNTER_FUNCTION_QUADRATURE_X1_A;
break;
case 1:
- *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X2;
+ *function = COUNTER_FUNCTION_QUADRATURE_X2_A;
break;
case 2:
- *function = QUAD8_COUNT_FUNCTION_QUADRATURE_X4;
+ *function = COUNTER_FUNCTION_QUADRATURE_X4;
break;
}
else
- *function = QUAD8_COUNT_FUNCTION_PULSE_DIRECTION;
+ *function = COUNTER_FUNCTION_PULSE_DIRECTION;
mutex_unlock(&priv->lock);
return 0;
}
-static int quad8_function_set(struct counter_device *counter,
- struct counter_count *count, size_t function)
+static int quad8_function_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function function)
{
struct quad8 *const priv = counter->priv;
const int id = count->id;
mode_cfg = priv->count_mode[id] << 1;
idr_cfg = priv->index_polarity[id] << 1;
- if (function == QUAD8_COUNT_FUNCTION_PULSE_DIRECTION) {
+ if (function == COUNTER_FUNCTION_PULSE_DIRECTION) {
*quadrature_mode = 0;
/* Quadrature scaling only available in quadrature mode */
*quadrature_mode = 1;
switch (function) {
- case QUAD8_COUNT_FUNCTION_QUADRATURE_X1:
+ case COUNTER_FUNCTION_QUADRATURE_X1_A:
*scale = 0;
mode_cfg |= QUAD8_CMR_QUADRATURE_X1;
break;
- case QUAD8_COUNT_FUNCTION_QUADRATURE_X2:
+ case COUNTER_FUNCTION_QUADRATURE_X2_A:
*scale = 1;
mode_cfg |= QUAD8_CMR_QUADRATURE_X2;
break;
- case QUAD8_COUNT_FUNCTION_QUADRATURE_X4:
+ case COUNTER_FUNCTION_QUADRATURE_X4:
*scale = 2;
mode_cfg |= QUAD8_CMR_QUADRATURE_X4;
break;
return 0;
}
-static void quad8_direction_get(struct counter_device *counter,
- struct counter_count *count, enum counter_count_direction *direction)
+static int quad8_direction_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_direction *direction)
{
const struct quad8 *const priv = counter->priv;
unsigned int ud_flag;
*direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD :
COUNTER_COUNT_DIRECTION_BACKWARD;
-}
-enum quad8_synapse_action {
- QUAD8_SYNAPSE_ACTION_NONE = 0,
- QUAD8_SYNAPSE_ACTION_RISING_EDGE,
- QUAD8_SYNAPSE_ACTION_FALLING_EDGE,
- QUAD8_SYNAPSE_ACTION_BOTH_EDGES
-};
+ return 0;
+}
static const enum counter_synapse_action quad8_index_actions_list[] = {
- [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
- [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
};
static const enum counter_synapse_action quad8_synapse_actions_list[] = {
- [QUAD8_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
- [QUAD8_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- [QUAD8_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
- [QUAD8_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
};
-static int quad8_action_get(struct counter_device *counter,
- struct counter_count *count, struct counter_synapse *synapse,
- size_t *action)
+static int quad8_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
struct quad8 *const priv = counter->priv;
int err;
- size_t function = 0;
+ enum counter_function function;
const size_t signal_a_id = count->synapses[0].signal->id;
enum counter_count_direction direction;
/* Handle Index signals */
if (synapse->signal->id >= 16) {
if (priv->preset_enable[count->id])
- *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
else
- *action = QUAD8_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
return 0;
}
- err = quad8_function_get(counter, count, &function);
+ err = quad8_function_read(counter, count, &function);
if (err)
return err;
/* Default action mode */
- *action = QUAD8_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
/* Determine action mode based on current count function mode */
switch (function) {
- case QUAD8_COUNT_FUNCTION_PULSE_DIRECTION:
+ case COUNTER_FUNCTION_PULSE_DIRECTION:
if (synapse->signal->id == signal_a_id)
- *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
return 0;
- case QUAD8_COUNT_FUNCTION_QUADRATURE_X1:
+ case COUNTER_FUNCTION_QUADRATURE_X1_A:
if (synapse->signal->id == signal_a_id) {
- quad8_direction_get(counter, count, &direction);
+ err = quad8_direction_read(counter, count, &direction);
+ if (err)
+ return err;
if (direction == COUNTER_COUNT_DIRECTION_FORWARD)
- *action = QUAD8_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
else
- *action = QUAD8_SYNAPSE_ACTION_FALLING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_FALLING_EDGE;
}
return 0;
- case QUAD8_COUNT_FUNCTION_QUADRATURE_X2:
+ case COUNTER_FUNCTION_QUADRATURE_X2_A:
if (synapse->signal->id == signal_a_id)
- *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
return 0;
- case QUAD8_COUNT_FUNCTION_QUADRATURE_X4:
- *action = QUAD8_SYNAPSE_ACTION_BOTH_EDGES;
+ case COUNTER_FUNCTION_QUADRATURE_X4:
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
return 0;
default:
/* should never reach this path */
.signal_read = quad8_signal_read,
.count_read = quad8_count_read,
.count_write = quad8_count_write,
- .function_get = quad8_function_get,
- .function_set = quad8_function_set,
- .action_get = quad8_action_get
+ .function_read = quad8_function_read,
+ .function_write = quad8_function_write,
+ .action_read = quad8_action_read
};
static const char *const quad8_index_polarity_modes[] = {
};
static int quad8_index_polarity_get(struct counter_device *counter,
- struct counter_signal *signal, size_t *index_polarity)
+ struct counter_signal *signal,
+ u32 *index_polarity)
{
const struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;
}
static int quad8_index_polarity_set(struct counter_device *counter,
- struct counter_signal *signal, size_t index_polarity)
+ struct counter_signal *signal,
+ u32 index_polarity)
{
struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;
return 0;
}
-static struct counter_signal_enum_ext quad8_index_pol_enum = {
- .items = quad8_index_polarity_modes,
- .num_items = ARRAY_SIZE(quad8_index_polarity_modes),
- .get = quad8_index_polarity_get,
- .set = quad8_index_polarity_set
-};
-
static const char *const quad8_synchronous_modes[] = {
"non-synchronous",
"synchronous"
};
static int quad8_synchronous_mode_get(struct counter_device *counter,
- struct counter_signal *signal, size_t *synchronous_mode)
+ struct counter_signal *signal,
+ u32 *synchronous_mode)
{
const struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;
}
static int quad8_synchronous_mode_set(struct counter_device *counter,
- struct counter_signal *signal, size_t synchronous_mode)
+ struct counter_signal *signal,
+ u32 synchronous_mode)
{
struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id - 16;
return 0;
}
-static struct counter_signal_enum_ext quad8_syn_mode_enum = {
- .items = quad8_synchronous_modes,
- .num_items = ARRAY_SIZE(quad8_synchronous_modes),
- .get = quad8_synchronous_mode_get,
- .set = quad8_synchronous_mode_set
-};
-
-static ssize_t quad8_count_floor_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_floor_read(struct counter_device *counter,
+ struct counter_count *count, u64 *floor)
{
/* Only a floor of 0 is supported */
- return sprintf(buf, "0\n");
+ *floor = 0;
+
+ return 0;
}
-static int quad8_count_mode_get(struct counter_device *counter,
- struct counter_count *count, size_t *cnt_mode)
+static int quad8_count_mode_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_mode *cnt_mode)
{
const struct quad8 *const priv = counter->priv;
return 0;
}
-static int quad8_count_mode_set(struct counter_device *counter,
- struct counter_count *count, size_t cnt_mode)
+static int quad8_count_mode_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_count_mode cnt_mode)
{
struct quad8 *const priv = counter->priv;
+ unsigned int count_mode;
unsigned int mode_cfg;
const int base_offset = priv->base + 2 * count->id + 1;
/* Map Generic Counter count mode to 104-QUAD-8 count mode */
switch (cnt_mode) {
case COUNTER_COUNT_MODE_NORMAL:
- cnt_mode = 0;
+ count_mode = 0;
break;
case COUNTER_COUNT_MODE_RANGE_LIMIT:
- cnt_mode = 1;
+ count_mode = 1;
break;
case COUNTER_COUNT_MODE_NON_RECYCLE:
- cnt_mode = 2;
+ count_mode = 2;
break;
case COUNTER_COUNT_MODE_MODULO_N:
- cnt_mode = 3;
+ count_mode = 3;
break;
default:
/* should never reach this path */
mutex_lock(&priv->lock);
- priv->count_mode[count->id] = cnt_mode;
+ priv->count_mode[count->id] = count_mode;
/* Set count mode configuration value */
- mode_cfg = cnt_mode << 1;
+ mode_cfg = count_mode << 1;
/* Add quadrature mode configuration */
if (priv->quadrature_mode[count->id])
return 0;
}
-static struct counter_count_enum_ext quad8_cnt_mode_enum = {
- .items = counter_count_mode_str,
- .num_items = ARRAY_SIZE(counter_count_mode_str),
- .get = quad8_count_mode_get,
- .set = quad8_count_mode_set
-};
-
-static ssize_t quad8_count_direction_read(struct counter_device *counter,
- struct counter_count *count, void *priv, char *buf)
-{
- enum counter_count_direction dir;
-
- quad8_direction_get(counter, count, &dir);
-
- return sprintf(buf, "%s\n", counter_count_direction_str[dir]);
-}
-
-static ssize_t quad8_count_enable_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_enable_read(struct counter_device *counter,
+ struct counter_count *count, u8 *enable)
{
const struct quad8 *const priv = counter->priv;
- return sprintf(buf, "%u\n", priv->ab_enable[count->id]);
+ *enable = priv->ab_enable[count->id];
+
+ return 0;
}
-static ssize_t quad8_count_enable_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_enable_write(struct counter_device *counter,
+ struct counter_count *count, u8 enable)
{
struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
- int err;
- bool ab_enable;
unsigned int ior_cfg;
- err = kstrtobool(buf, &ab_enable);
- if (err)
- return err;
-
mutex_lock(&priv->lock);
- priv->ab_enable[count->id] = ab_enable;
+ priv->ab_enable[count->id] = enable;
- ior_cfg = ab_enable | priv->preset_enable[count->id] << 1;
+ ior_cfg = enable | priv->preset_enable[count->id] << 1;
/* Load I/O control configuration */
outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1);
mutex_unlock(&priv->lock);
- return len;
+ return 0;
}
static const char *const quad8_noise_error_states[] = {
};
static int quad8_error_noise_get(struct counter_device *counter,
- struct counter_count *count, size_t *noise_error)
+ struct counter_count *count, u32 *noise_error)
{
const struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id + 1;
return 0;
}
-static struct counter_count_enum_ext quad8_error_noise_enum = {
- .items = quad8_noise_error_states,
- .num_items = ARRAY_SIZE(quad8_noise_error_states),
- .get = quad8_error_noise_get
-};
-
-static ssize_t quad8_count_preset_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_preset_read(struct counter_device *counter,
+ struct counter_count *count, u64 *preset)
{
const struct quad8 *const priv = counter->priv;
- return sprintf(buf, "%u\n", priv->preset[count->id]);
+ *preset = priv->preset[count->id];
+
+ return 0;
}
static void quad8_preset_register_set(struct quad8 *const priv, const int id,
outb(preset >> (8 * i), base_offset);
}
-static ssize_t quad8_count_preset_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_preset_write(struct counter_device *counter,
+ struct counter_count *count, u64 preset)
{
struct quad8 *const priv = counter->priv;
- unsigned int preset;
- int ret;
-
- ret = kstrtouint(buf, 0, &preset);
- if (ret)
- return ret;
/* Only 24-bit values are supported */
if (preset > 0xFFFFFF)
mutex_unlock(&priv->lock);
- return len;
+ return 0;
}
-static ssize_t quad8_count_ceiling_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_ceiling_read(struct counter_device *counter,
+ struct counter_count *count, u64 *ceiling)
{
struct quad8 *const priv = counter->priv;
switch (priv->count_mode[count->id]) {
case 1:
case 3:
- mutex_unlock(&priv->lock);
- return sprintf(buf, "%u\n", priv->preset[count->id]);
+ *ceiling = priv->preset[count->id];
+ break;
+ default:
+ /* By default 0x1FFFFFF (25 bits unsigned) is maximum count */
+ *ceiling = 0x1FFFFFF;
+ break;
}
mutex_unlock(&priv->lock);
- /* By default 0x1FFFFFF (25 bits unsigned) is maximum count */
- return sprintf(buf, "33554431\n");
+ return 0;
}
-static ssize_t quad8_count_ceiling_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_ceiling_write(struct counter_device *counter,
+ struct counter_count *count, u64 ceiling)
{
struct quad8 *const priv = counter->priv;
- unsigned int ceiling;
- int ret;
-
- ret = kstrtouint(buf, 0, &ceiling);
- if (ret)
- return ret;
/* Only 24-bit values are supported */
if (ceiling > 0xFFFFFF)
case 3:
quad8_preset_register_set(priv, count->id, ceiling);
mutex_unlock(&priv->lock);
- return len;
+ return 0;
}
mutex_unlock(&priv->lock);
return -EINVAL;
}
-static ssize_t quad8_count_preset_enable_read(struct counter_device *counter,
- struct counter_count *count, void *private, char *buf)
+static int quad8_count_preset_enable_read(struct counter_device *counter,
+ struct counter_count *count,
+ u8 *preset_enable)
{
const struct quad8 *const priv = counter->priv;
- return sprintf(buf, "%u\n", !priv->preset_enable[count->id]);
+ *preset_enable = !priv->preset_enable[count->id];
+
+ return 0;
}
-static ssize_t quad8_count_preset_enable_write(struct counter_device *counter,
- struct counter_count *count, void *private, const char *buf, size_t len)
+static int quad8_count_preset_enable_write(struct counter_device *counter,
+ struct counter_count *count,
+ u8 preset_enable)
{
struct quad8 *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id + 1;
- bool preset_enable;
- int ret;
unsigned int ior_cfg;
- ret = kstrtobool(buf, &preset_enable);
- if (ret)
- return ret;
-
/* Preset enable is active low in Input/Output Control register */
preset_enable = !preset_enable;
priv->preset_enable[count->id] = preset_enable;
- ior_cfg = priv->ab_enable[count->id] | (unsigned int)preset_enable << 1;
+ ior_cfg = priv->ab_enable[count->id] | preset_enable << 1;
/* Load I/O control configuration to Input / Output Control Register */
outb(QUAD8_CTR_IOR | ior_cfg, base_offset);
mutex_unlock(&priv->lock);
- return len;
+ return 0;
}
-static ssize_t quad8_signal_cable_fault_read(struct counter_device *counter,
- struct counter_signal *signal,
- void *private, char *buf)
+static int quad8_signal_cable_fault_read(struct counter_device *counter,
+ struct counter_signal *signal,
+ u8 *cable_fault)
{
struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
bool disabled;
unsigned int status;
- unsigned int fault;
mutex_lock(&priv->lock);
mutex_unlock(&priv->lock);
/* Mask respective channel and invert logic */
- fault = !(status & BIT(channel_id));
+ *cable_fault = !(status & BIT(channel_id));
- return sprintf(buf, "%u\n", fault);
+ return 0;
}
-static ssize_t quad8_signal_cable_fault_enable_read(
- struct counter_device *counter, struct counter_signal *signal,
- void *private, char *buf)
+static int quad8_signal_cable_fault_enable_read(struct counter_device *counter,
+ struct counter_signal *signal,
+ u8 *enable)
{
const struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
- const unsigned int enb = !!(priv->cable_fault_enable & BIT(channel_id));
- return sprintf(buf, "%u\n", enb);
+ *enable = !!(priv->cable_fault_enable & BIT(channel_id));
+
+ return 0;
}
-static ssize_t quad8_signal_cable_fault_enable_write(
- struct counter_device *counter, struct counter_signal *signal,
- void *private, const char *buf, size_t len)
+static int quad8_signal_cable_fault_enable_write(struct counter_device *counter,
+ struct counter_signal *signal,
+ u8 enable)
{
struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
- bool enable;
- int ret;
unsigned int cable_fault_enable;
- ret = kstrtobool(buf, &enable);
- if (ret)
- return ret;
-
mutex_lock(&priv->lock);
if (enable)
mutex_unlock(&priv->lock);
- return len;
+ return 0;
}
-static ssize_t quad8_signal_fck_prescaler_read(struct counter_device *counter,
- struct counter_signal *signal, void *private, char *buf)
+static int quad8_signal_fck_prescaler_read(struct counter_device *counter,
+ struct counter_signal *signal,
+ u8 *prescaler)
{
const struct quad8 *const priv = counter->priv;
- const size_t channel_id = signal->id / 2;
- return sprintf(buf, "%u\n", priv->fck_prescaler[channel_id]);
+ *prescaler = priv->fck_prescaler[signal->id / 2];
+
+ return 0;
}
-static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter,
- struct counter_signal *signal, void *private, const char *buf,
- size_t len)
+static int quad8_signal_fck_prescaler_write(struct counter_device *counter,
+ struct counter_signal *signal,
+ u8 prescaler)
{
struct quad8 *const priv = counter->priv;
const size_t channel_id = signal->id / 2;
const int base_offset = priv->base + 2 * channel_id;
- u8 prescaler;
- int ret;
-
- ret = kstrtou8(buf, 0, &prescaler);
- if (ret)
- return ret;
mutex_lock(&priv->lock);
mutex_unlock(&priv->lock);
- return len;
+ return 0;
}
-static const struct counter_signal_ext quad8_signal_ext[] = {
- {
- .name = "cable_fault",
- .read = quad8_signal_cable_fault_read
- },
- {
- .name = "cable_fault_enable",
- .read = quad8_signal_cable_fault_enable_read,
- .write = quad8_signal_cable_fault_enable_write
- },
- {
- .name = "filter_clock_prescaler",
- .read = quad8_signal_fck_prescaler_read,
- .write = quad8_signal_fck_prescaler_write
- }
+static struct counter_comp quad8_signal_ext[] = {
+ COUNTER_COMP_SIGNAL_BOOL("cable_fault", quad8_signal_cable_fault_read,
+ NULL),
+ COUNTER_COMP_SIGNAL_BOOL("cable_fault_enable",
+ quad8_signal_cable_fault_enable_read,
+ quad8_signal_cable_fault_enable_write),
+ COUNTER_COMP_SIGNAL_U8("filter_clock_prescaler",
+ quad8_signal_fck_prescaler_read,
+ quad8_signal_fck_prescaler_write)
};
-static const struct counter_signal_ext quad8_index_ext[] = {
- COUNTER_SIGNAL_ENUM("index_polarity", &quad8_index_pol_enum),
- COUNTER_SIGNAL_ENUM_AVAILABLE("index_polarity", &quad8_index_pol_enum),
- COUNTER_SIGNAL_ENUM("synchronous_mode", &quad8_syn_mode_enum),
- COUNTER_SIGNAL_ENUM_AVAILABLE("synchronous_mode", &quad8_syn_mode_enum)
+static DEFINE_COUNTER_ENUM(quad8_index_pol_enum, quad8_index_polarity_modes);
+static DEFINE_COUNTER_ENUM(quad8_synch_mode_enum, quad8_synchronous_modes);
+
+static struct counter_comp quad8_index_ext[] = {
+ COUNTER_COMP_SIGNAL_ENUM("index_polarity", quad8_index_polarity_get,
+ quad8_index_polarity_set,
+ quad8_index_pol_enum),
+ COUNTER_COMP_SIGNAL_ENUM("synchronous_mode", quad8_synchronous_mode_get,
+ quad8_synchronous_mode_set,
+ quad8_synch_mode_enum),
};
#define QUAD8_QUAD_SIGNAL(_id, _name) { \
QUAD8_COUNT_SYNAPSES(6), QUAD8_COUNT_SYNAPSES(7)
};
-static const struct counter_count_ext quad8_count_ext[] = {
- {
- .name = "ceiling",
- .read = quad8_count_ceiling_read,
- .write = quad8_count_ceiling_write
- },
- {
- .name = "floor",
- .read = quad8_count_floor_read
- },
- COUNTER_COUNT_ENUM("count_mode", &quad8_cnt_mode_enum),
- COUNTER_COUNT_ENUM_AVAILABLE("count_mode", &quad8_cnt_mode_enum),
- {
- .name = "direction",
- .read = quad8_count_direction_read
- },
- {
- .name = "enable",
- .read = quad8_count_enable_read,
- .write = quad8_count_enable_write
- },
- COUNTER_COUNT_ENUM("error_noise", &quad8_error_noise_enum),
- COUNTER_COUNT_ENUM_AVAILABLE("error_noise", &quad8_error_noise_enum),
- {
- .name = "preset",
- .read = quad8_count_preset_read,
- .write = quad8_count_preset_write
- },
- {
- .name = "preset_enable",
- .read = quad8_count_preset_enable_read,
- .write = quad8_count_preset_enable_write
- }
+static const enum counter_count_mode quad8_cnt_modes[] = {
+ COUNTER_COUNT_MODE_NORMAL,
+ COUNTER_COUNT_MODE_RANGE_LIMIT,
+ COUNTER_COUNT_MODE_NON_RECYCLE,
+ COUNTER_COUNT_MODE_MODULO_N,
+};
+
+static DEFINE_COUNTER_AVAILABLE(quad8_count_mode_available, quad8_cnt_modes);
+
+static DEFINE_COUNTER_ENUM(quad8_error_noise_enum, quad8_noise_error_states);
+
+static struct counter_comp quad8_count_ext[] = {
+ COUNTER_COMP_CEILING(quad8_count_ceiling_read,
+ quad8_count_ceiling_write),
+ COUNTER_COMP_FLOOR(quad8_count_floor_read, NULL),
+ COUNTER_COMP_COUNT_MODE(quad8_count_mode_read, quad8_count_mode_write,
+ quad8_count_mode_available),
+ COUNTER_COMP_DIRECTION(quad8_direction_read),
+ COUNTER_COMP_ENABLE(quad8_count_enable_read, quad8_count_enable_write),
+ COUNTER_COMP_COUNT_ENUM("error_noise", quad8_error_noise_get, NULL,
+ quad8_error_noise_enum),
+ COUNTER_COMP_PRESET(quad8_count_preset_read, quad8_count_preset_write),
+ COUNTER_COMP_PRESET_ENABLE(quad8_count_preset_enable_read,
+ quad8_count_preset_enable_write),
};
#define QUAD8_COUNT(_id, _cntname) { \
#
obj-$(CONFIG_COUNTER) += counter.o
+counter-y := counter-core.o counter-sysfs.o
obj-$(CONFIG_104_QUAD_8) += 104-quad-8.o
obj-$(CONFIG_INTERRUPT_CNT) += interrupt-cnt.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic Counter interface
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#include <linux/counter.h>
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/gfp.h>
+#include <linux/idr.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include "counter-sysfs.h"
+
+/* Provides a unique ID for each counter device */
+static DEFINE_IDA(counter_ida);
+
+static void counter_device_release(struct device *dev)
+{
+ ida_free(&counter_ida, dev->id);
+}
+
+static struct device_type counter_device_type = {
+ .name = "counter_device",
+ .release = counter_device_release,
+};
+
+static struct bus_type counter_bus_type = {
+ .name = "counter",
+ .dev_name = "counter",
+};
+
+/**
+ * counter_register - register Counter to the system
+ * @counter: pointer to Counter to register
+ *
+ * This function registers a Counter to the system. A sysfs "counter" directory
+ * will be created and populated with sysfs attributes correlating with the
+ * Counter Signals, Synapses, and Counts respectively.
+ */
+int counter_register(struct counter_device *const counter)
+{
+ struct device *const dev = &counter->dev;
+ int id;
+ int err;
+
+ /* Acquire unique ID */
+ id = ida_alloc(&counter_ida, GFP_KERNEL);
+ if (id < 0)
+ return id;
+
+ /* Configure device structure for Counter */
+ dev->id = id;
+ dev->type = &counter_device_type;
+ dev->bus = &counter_bus_type;
+ if (counter->parent) {
+ dev->parent = counter->parent;
+ dev->of_node = counter->parent->of_node;
+ }
+ device_initialize(dev);
+ dev_set_drvdata(dev, counter);
+
+ /* Add Counter sysfs attributes */
+ err = counter_sysfs_add(counter);
+ if (err < 0)
+ goto err_free_id;
+
+ /* Add device to system */
+ err = device_add(dev);
+ if (err < 0)
+ goto err_free_id;
+
+ return 0;
+
+err_free_id:
+ put_device(dev);
+ return err;
+}
+EXPORT_SYMBOL_GPL(counter_register);
+
+/**
+ * counter_unregister - unregister Counter from the system
+ * @counter: pointer to Counter to unregister
+ *
+ * The Counter is unregistered from the system.
+ */
+void counter_unregister(struct counter_device *const counter)
+{
+ if (!counter)
+ return;
+
+ device_unregister(&counter->dev);
+}
+EXPORT_SYMBOL_GPL(counter_unregister);
+
+static void devm_counter_release(void *counter)
+{
+ counter_unregister(counter);
+}
+
+/**
+ * devm_counter_register - Resource-managed counter_register
+ * @dev: device to allocate counter_device for
+ * @counter: pointer to Counter to register
+ *
+ * Managed counter_register. The Counter registered with this function is
+ * automatically unregistered on driver detach. This function calls
+ * counter_register internally. Refer to that function for more information.
+ *
+ * RETURNS:
+ * 0 on success, negative error number on failure.
+ */
+int devm_counter_register(struct device *dev,
+ struct counter_device *const counter)
+{
+ int err;
+
+ err = counter_register(counter);
+ if (err < 0)
+ return err;
+
+ return devm_add_action_or_reset(dev, devm_counter_release, counter);
+}
+EXPORT_SYMBOL_GPL(devm_counter_register);
+
+static int __init counter_init(void)
+{
+ return bus_register(&counter_bus_type);
+}
+
+static void __exit counter_exit(void)
+{
+ bus_unregister(&counter_bus_type);
+}
+
+subsys_initcall(counter_init);
+module_exit(counter_exit);
+
+MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
+MODULE_DESCRIPTION("Generic Counter interface");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic Counter sysfs interface
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#include <linux/counter.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/kstrtox.h>
+#include <linux/list.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/types.h>
+
+#include "counter-sysfs.h"
+
+/**
+ * struct counter_attribute - Counter sysfs attribute
+ * @dev_attr: device attribute for sysfs
+ * @l: node to add Counter attribute to attribute group list
+ * @comp: Counter component callbacks and data
+ * @scope: Counter scope of the attribute
+ * @parent: pointer to the parent component
+ */
+struct counter_attribute {
+ struct device_attribute dev_attr;
+ struct list_head l;
+
+ struct counter_comp comp;
+ enum counter_scope scope;
+ void *parent;
+};
+
+#define to_counter_attribute(_dev_attr) \
+ container_of(_dev_attr, struct counter_attribute, dev_attr)
+
+/**
+ * struct counter_attribute_group - container for attribute group
+ * @name: name of the attribute group
+ * @attr_list: list to keep track of created attributes
+ * @num_attr: number of attributes
+ */
+struct counter_attribute_group {
+ const char *name;
+ struct list_head attr_list;
+ size_t num_attr;
+};
+
+static const char *const counter_function_str[] = {
+ [COUNTER_FUNCTION_INCREASE] = "increase",
+ [COUNTER_FUNCTION_DECREASE] = "decrease",
+ [COUNTER_FUNCTION_PULSE_DIRECTION] = "pulse-direction",
+ [COUNTER_FUNCTION_QUADRATURE_X1_A] = "quadrature x1 a",
+ [COUNTER_FUNCTION_QUADRATURE_X1_B] = "quadrature x1 b",
+ [COUNTER_FUNCTION_QUADRATURE_X2_A] = "quadrature x2 a",
+ [COUNTER_FUNCTION_QUADRATURE_X2_B] = "quadrature x2 b",
+ [COUNTER_FUNCTION_QUADRATURE_X4] = "quadrature x4"
+};
+
+static const char *const counter_signal_value_str[] = {
+ [COUNTER_SIGNAL_LEVEL_LOW] = "low",
+ [COUNTER_SIGNAL_LEVEL_HIGH] = "high"
+};
+
+static const char *const counter_synapse_action_str[] = {
+ [COUNTER_SYNAPSE_ACTION_NONE] = "none",
+ [COUNTER_SYNAPSE_ACTION_RISING_EDGE] = "rising edge",
+ [COUNTER_SYNAPSE_ACTION_FALLING_EDGE] = "falling edge",
+ [COUNTER_SYNAPSE_ACTION_BOTH_EDGES] = "both edges"
+};
+
+static const char *const counter_count_direction_str[] = {
+ [COUNTER_COUNT_DIRECTION_FORWARD] = "forward",
+ [COUNTER_COUNT_DIRECTION_BACKWARD] = "backward"
+};
+
+static const char *const counter_count_mode_str[] = {
+ [COUNTER_COUNT_MODE_NORMAL] = "normal",
+ [COUNTER_COUNT_MODE_RANGE_LIMIT] = "range limit",
+ [COUNTER_COUNT_MODE_NON_RECYCLE] = "non-recycle",
+ [COUNTER_COUNT_MODE_MODULO_N] = "modulo-n"
+};
+
+static ssize_t counter_comp_u8_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ int err;
+ u8 data = 0;
+
+ switch (a->scope) {
+ case COUNTER_SCOPE_DEVICE:
+ err = a->comp.device_u8_read(counter, &data);
+ break;
+ case COUNTER_SCOPE_SIGNAL:
+ err = a->comp.signal_u8_read(counter, a->parent, &data);
+ break;
+ case COUNTER_SCOPE_COUNT:
+ err = a->comp.count_u8_read(counter, a->parent, &data);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ if (a->comp.type == COUNTER_COMP_BOOL)
+ /* data should already be boolean but ensure just to be safe */
+ data = !!data;
+
+ return sprintf(buf, "%u\n", (unsigned int)data);
+}
+
+static ssize_t counter_comp_u8_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ int err;
+ bool bool_data = 0;
+ u8 data = 0;
+
+ if (a->comp.type == COUNTER_COMP_BOOL) {
+ err = kstrtobool(buf, &bool_data);
+ data = bool_data;
+ } else
+ err = kstrtou8(buf, 0, &data);
+ if (err < 0)
+ return err;
+
+ switch (a->scope) {
+ case COUNTER_SCOPE_DEVICE:
+ err = a->comp.device_u8_write(counter, data);
+ break;
+ case COUNTER_SCOPE_SIGNAL:
+ err = a->comp.signal_u8_write(counter, a->parent, data);
+ break;
+ case COUNTER_SCOPE_COUNT:
+ err = a->comp.count_u8_write(counter, a->parent, data);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_comp_u32_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ const struct counter_available *const avail = a->comp.priv;
+ int err;
+ u32 data = 0;
+
+ switch (a->scope) {
+ case COUNTER_SCOPE_DEVICE:
+ err = a->comp.device_u32_read(counter, &data);
+ break;
+ case COUNTER_SCOPE_SIGNAL:
+ err = a->comp.signal_u32_read(counter, a->parent, &data);
+ break;
+ case COUNTER_SCOPE_COUNT:
+ if (a->comp.type == COUNTER_COMP_SYNAPSE_ACTION)
+ err = a->comp.action_read(counter, a->parent,
+ a->comp.priv, &data);
+ else
+ err = a->comp.count_u32_read(counter, a->parent, &data);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ switch (a->comp.type) {
+ case COUNTER_COMP_FUNCTION:
+ return sysfs_emit(buf, "%s\n", counter_function_str[data]);
+ case COUNTER_COMP_SIGNAL_LEVEL:
+ return sysfs_emit(buf, "%s\n", counter_signal_value_str[data]);
+ case COUNTER_COMP_SYNAPSE_ACTION:
+ return sysfs_emit(buf, "%s\n", counter_synapse_action_str[data]);
+ case COUNTER_COMP_ENUM:
+ return sysfs_emit(buf, "%s\n", avail->strs[data]);
+ case COUNTER_COMP_COUNT_DIRECTION:
+ return sysfs_emit(buf, "%s\n", counter_count_direction_str[data]);
+ case COUNTER_COMP_COUNT_MODE:
+ return sysfs_emit(buf, "%s\n", counter_count_mode_str[data]);
+ default:
+ return sprintf(buf, "%u\n", (unsigned int)data);
+ }
+}
+
+static int counter_find_enum(u32 *const enum_item, const u32 *const enums,
+ const size_t num_enums, const char *const buf,
+ const char *const string_array[])
+{
+ size_t index;
+
+ for (index = 0; index < num_enums; index++) {
+ *enum_item = enums[index];
+ if (sysfs_streq(buf, string_array[*enum_item]))
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t counter_comp_u32_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ struct counter_count *const count = a->parent;
+ struct counter_synapse *const synapse = a->comp.priv;
+ const struct counter_available *const avail = a->comp.priv;
+ int err;
+ u32 data = 0;
+
+ switch (a->comp.type) {
+ case COUNTER_COMP_FUNCTION:
+ err = counter_find_enum(&data, count->functions_list,
+ count->num_functions, buf,
+ counter_function_str);
+ break;
+ case COUNTER_COMP_SYNAPSE_ACTION:
+ err = counter_find_enum(&data, synapse->actions_list,
+ synapse->num_actions, buf,
+ counter_synapse_action_str);
+ break;
+ case COUNTER_COMP_ENUM:
+ err = __sysfs_match_string(avail->strs, avail->num_items, buf);
+ data = err;
+ break;
+ case COUNTER_COMP_COUNT_MODE:
+ err = counter_find_enum(&data, avail->enums, avail->num_items,
+ buf, counter_count_mode_str);
+ break;
+ default:
+ err = kstrtou32(buf, 0, &data);
+ break;
+ }
+ if (err < 0)
+ return err;
+
+ switch (a->scope) {
+ case COUNTER_SCOPE_DEVICE:
+ err = a->comp.device_u32_write(counter, data);
+ break;
+ case COUNTER_SCOPE_SIGNAL:
+ err = a->comp.signal_u32_write(counter, a->parent, data);
+ break;
+ case COUNTER_SCOPE_COUNT:
+ if (a->comp.type == COUNTER_COMP_SYNAPSE_ACTION)
+ err = a->comp.action_write(counter, count, synapse,
+ data);
+ else
+ err = a->comp.count_u32_write(counter, count, data);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ return len;
+}
+
+static ssize_t counter_comp_u64_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ int err;
+ u64 data = 0;
+
+ switch (a->scope) {
+ case COUNTER_SCOPE_DEVICE:
+ err = a->comp.device_u64_read(counter, &data);
+ break;
+ case COUNTER_SCOPE_SIGNAL:
+ err = a->comp.signal_u64_read(counter, a->parent, &data);
+ break;
+ case COUNTER_SCOPE_COUNT:
+ err = a->comp.count_u64_read(counter, a->parent, &data);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ return sprintf(buf, "%llu\n", (unsigned long long)data);
+}
+
+static ssize_t counter_comp_u64_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ struct counter_device *const counter = dev_get_drvdata(dev);
+ int err;
+ u64 data = 0;
+
+ err = kstrtou64(buf, 0, &data);
+ if (err < 0)
+ return err;
+
+ switch (a->scope) {
+ case COUNTER_SCOPE_DEVICE:
+ err = a->comp.device_u64_write(counter, data);
+ break;
+ case COUNTER_SCOPE_SIGNAL:
+ err = a->comp.signal_u64_write(counter, a->parent, data);
+ break;
+ case COUNTER_SCOPE_COUNT:
+ err = a->comp.count_u64_write(counter, a->parent, data);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ return len;
+}
+
+static ssize_t enums_available_show(const u32 *const enums,
+ const size_t num_enums,
+ const char *const strs[], char *buf)
+{
+ size_t len = 0;
+ size_t index;
+
+ for (index = 0; index < num_enums; index++)
+ len += sysfs_emit_at(buf, len, "%s\n", strs[enums[index]]);
+
+ return len;
+}
+
+static ssize_t strs_available_show(const struct counter_available *const avail,
+ char *buf)
+{
+ size_t len = 0;
+ size_t index;
+
+ for (index = 0; index < avail->num_items; index++)
+ len += sysfs_emit_at(buf, len, "%s\n", avail->strs[index]);
+
+ return len;
+}
+
+static ssize_t counter_comp_available_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ const struct counter_attribute *const a = to_counter_attribute(attr);
+ const struct counter_count *const count = a->parent;
+ const struct counter_synapse *const synapse = a->comp.priv;
+ const struct counter_available *const avail = a->comp.priv;
+
+ switch (a->comp.type) {
+ case COUNTER_COMP_FUNCTION:
+ return enums_available_show(count->functions_list,
+ count->num_functions,
+ counter_function_str, buf);
+ case COUNTER_COMP_SYNAPSE_ACTION:
+ return enums_available_show(synapse->actions_list,
+ synapse->num_actions,
+ counter_synapse_action_str, buf);
+ case COUNTER_COMP_ENUM:
+ return strs_available_show(avail, buf);
+ case COUNTER_COMP_COUNT_MODE:
+ return enums_available_show(avail->enums, avail->num_items,
+ counter_count_mode_str, buf);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int counter_avail_attr_create(struct device *const dev,
+ struct counter_attribute_group *const group,
+ const struct counter_comp *const comp, void *const parent)
+{
+ struct counter_attribute *counter_attr;
+ struct device_attribute *dev_attr;
+
+ counter_attr = devm_kzalloc(dev, sizeof(*counter_attr), GFP_KERNEL);
+ if (!counter_attr)
+ return -ENOMEM;
+
+ /* Configure Counter attribute */
+ counter_attr->comp.type = comp->type;
+ counter_attr->comp.priv = comp->priv;
+ counter_attr->parent = parent;
+
+ /* Initialize sysfs attribute */
+ dev_attr = &counter_attr->dev_attr;
+ sysfs_attr_init(&dev_attr->attr);
+
+ /* Configure device attribute */
+ dev_attr->attr.name = devm_kasprintf(dev, GFP_KERNEL, "%s_available",
+ comp->name);
+ if (!dev_attr->attr.name)
+ return -ENOMEM;
+ dev_attr->attr.mode = 0444;
+ dev_attr->show = counter_comp_available_show;
+
+ /* Store list node */
+ list_add(&counter_attr->l, &group->attr_list);
+ group->num_attr++;
+
+ return 0;
+}
+
+static int counter_attr_create(struct device *const dev,
+ struct counter_attribute_group *const group,
+ const struct counter_comp *const comp,
+ const enum counter_scope scope,
+ void *const parent)
+{
+ struct counter_attribute *counter_attr;
+ struct device_attribute *dev_attr;
+
+ counter_attr = devm_kzalloc(dev, sizeof(*counter_attr), GFP_KERNEL);
+ if (!counter_attr)
+ return -ENOMEM;
+
+ /* Configure Counter attribute */
+ counter_attr->comp = *comp;
+ counter_attr->scope = scope;
+ counter_attr->parent = parent;
+
+ /* Configure device attribute */
+ dev_attr = &counter_attr->dev_attr;
+ sysfs_attr_init(&dev_attr->attr);
+ dev_attr->attr.name = comp->name;
+ switch (comp->type) {
+ case COUNTER_COMP_U8:
+ case COUNTER_COMP_BOOL:
+ if (comp->device_u8_read) {
+ dev_attr->attr.mode |= 0444;
+ dev_attr->show = counter_comp_u8_show;
+ }
+ if (comp->device_u8_write) {
+ dev_attr->attr.mode |= 0200;
+ dev_attr->store = counter_comp_u8_store;
+ }
+ break;
+ case COUNTER_COMP_SIGNAL_LEVEL:
+ case COUNTER_COMP_FUNCTION:
+ case COUNTER_COMP_SYNAPSE_ACTION:
+ case COUNTER_COMP_ENUM:
+ case COUNTER_COMP_COUNT_DIRECTION:
+ case COUNTER_COMP_COUNT_MODE:
+ if (comp->device_u32_read) {
+ dev_attr->attr.mode |= 0444;
+ dev_attr->show = counter_comp_u32_show;
+ }
+ if (comp->device_u32_write) {
+ dev_attr->attr.mode |= 0200;
+ dev_attr->store = counter_comp_u32_store;
+ }
+ break;
+ case COUNTER_COMP_U64:
+ if (comp->device_u64_read) {
+ dev_attr->attr.mode |= 0444;
+ dev_attr->show = counter_comp_u64_show;
+ }
+ if (comp->device_u64_write) {
+ dev_attr->attr.mode |= 0200;
+ dev_attr->store = counter_comp_u64_store;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Store list node */
+ list_add(&counter_attr->l, &group->attr_list);
+ group->num_attr++;
+
+ /* Create "*_available" attribute if needed */
+ switch (comp->type) {
+ case COUNTER_COMP_FUNCTION:
+ case COUNTER_COMP_SYNAPSE_ACTION:
+ case COUNTER_COMP_ENUM:
+ case COUNTER_COMP_COUNT_MODE:
+ return counter_avail_attr_create(dev, group, comp, parent);
+ default:
+ return 0;
+ }
+}
+
+static ssize_t counter_comp_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sysfs_emit(buf, "%s\n", to_counter_attribute(attr)->comp.name);
+}
+
+static int counter_name_attr_create(struct device *const dev,
+ struct counter_attribute_group *const group,
+ const char *const name)
+{
+ struct counter_attribute *counter_attr;
+
+ counter_attr = devm_kzalloc(dev, sizeof(*counter_attr), GFP_KERNEL);
+ if (!counter_attr)
+ return -ENOMEM;
+
+ /* Configure Counter attribute */
+ counter_attr->comp.name = name;
+
+ /* Configure device attribute */
+ sysfs_attr_init(&counter_attr->dev_attr.attr);
+ counter_attr->dev_attr.attr.name = "name";
+ counter_attr->dev_attr.attr.mode = 0444;
+ counter_attr->dev_attr.show = counter_comp_name_show;
+
+ /* Store list node */
+ list_add(&counter_attr->l, &group->attr_list);
+ group->num_attr++;
+
+ return 0;
+}
+
+static struct counter_comp counter_signal_comp = {
+ .type = COUNTER_COMP_SIGNAL_LEVEL,
+ .name = "signal",
+};
+
+static int counter_signal_attrs_create(struct counter_device *const counter,
+ struct counter_attribute_group *const cattr_group,
+ struct counter_signal *const signal)
+{
+ const enum counter_scope scope = COUNTER_SCOPE_SIGNAL;
+ struct device *const dev = &counter->dev;
+ int err;
+ struct counter_comp comp;
+ size_t i;
+
+ /* Create main Signal attribute */
+ comp = counter_signal_comp;
+ comp.signal_u32_read = counter->ops->signal_read;
+ err = counter_attr_create(dev, cattr_group, &comp, scope, signal);
+ if (err < 0)
+ return err;
+
+ /* Create Signal name attribute */
+ err = counter_name_attr_create(dev, cattr_group, signal->name);
+ if (err < 0)
+ return err;
+
+ /* Create an attribute for each extension */
+ for (i = 0; i < signal->num_ext; i++) {
+ err = counter_attr_create(dev, cattr_group, signal->ext + i,
+ scope, signal);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int counter_sysfs_signals_add(struct counter_device *const counter,
+ struct counter_attribute_group *const groups)
+{
+ size_t i;
+ int err;
+
+ /* Add each Signal */
+ for (i = 0; i < counter->num_signals; i++) {
+ /* Generate Signal attribute directory name */
+ groups[i].name = devm_kasprintf(&counter->dev, GFP_KERNEL,
+ "signal%zu", i);
+ if (!groups[i].name)
+ return -ENOMEM;
+
+ /* Create all attributes associated with Signal */
+ err = counter_signal_attrs_create(counter, groups + i,
+ counter->signals + i);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int counter_sysfs_synapses_add(struct counter_device *const counter,
+ struct counter_attribute_group *const group,
+ struct counter_count *const count)
+{
+ size_t i;
+
+ /* Add each Synapse */
+ for (i = 0; i < count->num_synapses; i++) {
+ struct device *const dev = &counter->dev;
+ struct counter_synapse *synapse;
+ size_t id;
+ struct counter_comp comp;
+ int err;
+
+ synapse = count->synapses + i;
+
+ /* Generate Synapse action name */
+ id = synapse->signal - counter->signals;
+ comp.name = devm_kasprintf(dev, GFP_KERNEL, "signal%zu_action",
+ id);
+ if (!comp.name)
+ return -ENOMEM;
+
+ /* Create action attribute */
+ comp.type = COUNTER_COMP_SYNAPSE_ACTION;
+ comp.action_read = counter->ops->action_read;
+ comp.action_write = counter->ops->action_write;
+ comp.priv = synapse;
+ err = counter_attr_create(dev, group, &comp,
+ COUNTER_SCOPE_COUNT, count);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static struct counter_comp counter_count_comp =
+ COUNTER_COMP_COUNT_U64("count", NULL, NULL);
+
+static struct counter_comp counter_function_comp = {
+ .type = COUNTER_COMP_FUNCTION,
+ .name = "function",
+};
+
+static int counter_count_attrs_create(struct counter_device *const counter,
+ struct counter_attribute_group *const cattr_group,
+ struct counter_count *const count)
+{
+ const enum counter_scope scope = COUNTER_SCOPE_COUNT;
+ struct device *const dev = &counter->dev;
+ int err;
+ struct counter_comp comp;
+ size_t i;
+
+ /* Create main Count attribute */
+ comp = counter_count_comp;
+ comp.count_u64_read = counter->ops->count_read;
+ comp.count_u64_write = counter->ops->count_write;
+ err = counter_attr_create(dev, cattr_group, &comp, scope, count);
+ if (err < 0)
+ return err;
+
+ /* Create Count name attribute */
+ err = counter_name_attr_create(dev, cattr_group, count->name);
+ if (err < 0)
+ return err;
+
+ /* Create Count function attribute */
+ comp = counter_function_comp;
+ comp.count_u32_read = counter->ops->function_read;
+ comp.count_u32_write = counter->ops->function_write;
+ err = counter_attr_create(dev, cattr_group, &comp, scope, count);
+ if (err < 0)
+ return err;
+
+ /* Create an attribute for each extension */
+ for (i = 0; i < count->num_ext; i++) {
+ err = counter_attr_create(dev, cattr_group, count->ext + i,
+ scope, count);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int counter_sysfs_counts_add(struct counter_device *const counter,
+ struct counter_attribute_group *const groups)
+{
+ size_t i;
+ struct counter_count *count;
+ int err;
+
+ /* Add each Count */
+ for (i = 0; i < counter->num_counts; i++) {
+ count = counter->counts + i;
+
+ /* Generate Count attribute directory name */
+ groups[i].name = devm_kasprintf(&counter->dev, GFP_KERNEL,
+ "count%zu", i);
+ if (!groups[i].name)
+ return -ENOMEM;
+
+ /* Add sysfs attributes of the Synapses */
+ err = counter_sysfs_synapses_add(counter, groups + i, count);
+ if (err < 0)
+ return err;
+
+ /* Create all attributes associated with Count */
+ err = counter_count_attrs_create(counter, groups + i, count);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static int counter_num_signals_read(struct counter_device *counter, u8 *val)
+{
+ *val = counter->num_signals;
+ return 0;
+}
+
+static int counter_num_counts_read(struct counter_device *counter, u8 *val)
+{
+ *val = counter->num_counts;
+ return 0;
+}
+
+static struct counter_comp counter_num_signals_comp =
+ COUNTER_COMP_DEVICE_U8("num_signals", counter_num_signals_read, NULL);
+
+static struct counter_comp counter_num_counts_comp =
+ COUNTER_COMP_DEVICE_U8("num_counts", counter_num_counts_read, NULL);
+
+static int counter_sysfs_attr_add(struct counter_device *const counter,
+ struct counter_attribute_group *cattr_group)
+{
+ const enum counter_scope scope = COUNTER_SCOPE_DEVICE;
+ struct device *const dev = &counter->dev;
+ int err;
+ size_t i;
+
+ /* Add Signals sysfs attributes */
+ err = counter_sysfs_signals_add(counter, cattr_group);
+ if (err < 0)
+ return err;
+ cattr_group += counter->num_signals;
+
+ /* Add Counts sysfs attributes */
+ err = counter_sysfs_counts_add(counter, cattr_group);
+ if (err < 0)
+ return err;
+ cattr_group += counter->num_counts;
+
+ /* Create name attribute */
+ err = counter_name_attr_create(dev, cattr_group, counter->name);
+ if (err < 0)
+ return err;
+
+ /* Create num_signals attribute */
+ err = counter_attr_create(dev, cattr_group, &counter_num_signals_comp,
+ scope, NULL);
+ if (err < 0)
+ return err;
+
+ /* Create num_counts attribute */
+ err = counter_attr_create(dev, cattr_group, &counter_num_counts_comp,
+ scope, NULL);
+ if (err < 0)
+ return err;
+
+ /* Create an attribute for each extension */
+ for (i = 0; i < counter->num_ext; i++) {
+ err = counter_attr_create(dev, cattr_group, counter->ext + i,
+ scope, NULL);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * counter_sysfs_add - Adds Counter sysfs attributes to the device structure
+ * @counter: Pointer to the Counter device structure
+ *
+ * Counter sysfs attributes are created and added to the respective device
+ * structure for later registration to the system. Resource-managed memory
+ * allocation is performed by this function, and this memory should be freed
+ * when no longer needed (automatically by a device_unregister call, or
+ * manually by a devres_release_all call).
+ */
+int counter_sysfs_add(struct counter_device *const counter)
+{
+ struct device *const dev = &counter->dev;
+ const size_t num_groups = counter->num_signals + counter->num_counts + 1;
+ struct counter_attribute_group *cattr_groups;
+ size_t i, j;
+ int err;
+ struct attribute_group *groups;
+ struct counter_attribute *p;
+
+ /* Allocate space for attribute groups (signals, counts, and ext) */
+ cattr_groups = devm_kcalloc(dev, num_groups, sizeof(*cattr_groups),
+ GFP_KERNEL);
+ if (!cattr_groups)
+ return -ENOMEM;
+
+ /* Initialize attribute lists */
+ for (i = 0; i < num_groups; i++)
+ INIT_LIST_HEAD(&cattr_groups[i].attr_list);
+
+ /* Add Counter device sysfs attributes */
+ err = counter_sysfs_attr_add(counter, cattr_groups);
+ if (err < 0)
+ return err;
+
+ /* Allocate attribute group pointers for association with device */
+ dev->groups = devm_kcalloc(dev, num_groups + 1, sizeof(*dev->groups),
+ GFP_KERNEL);
+ if (!dev->groups)
+ return -ENOMEM;
+
+ /* Allocate space for attribute groups */
+ groups = devm_kcalloc(dev, num_groups, sizeof(*groups), GFP_KERNEL);
+ if (!groups)
+ return -ENOMEM;
+
+ /* Prepare each group of attributes for association */
+ for (i = 0; i < num_groups; i++) {
+ groups[i].name = cattr_groups[i].name;
+
+ /* Allocate space for attribute pointers */
+ groups[i].attrs = devm_kcalloc(dev,
+ cattr_groups[i].num_attr + 1,
+ sizeof(*groups[i].attrs),
+ GFP_KERNEL);
+ if (!groups[i].attrs)
+ return -ENOMEM;
+
+ /* Add attribute pointers to attribute group */
+ j = 0;
+ list_for_each_entry(p, &cattr_groups[i].attr_list, l)
+ groups[i].attrs[j++] = &p->dev_attr.attr;
+
+ /* Associate attribute group */
+ dev->groups[i] = &groups[i];
+ }
+
+ return 0;
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Counter sysfs interface
+ * Copyright (C) 2020 William Breathitt Gray
+ */
+#ifndef _COUNTER_SYSFS_H_
+#define _COUNTER_SYSFS_H_
+
+#include <linux/counter.h>
+
+int counter_sysfs_add(struct counter_device *const counter);
+
+#endif /* _COUNTER_SYSFS_H_ */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Generic Counter interface
- * Copyright (C) 2018 William Breathitt Gray
- */
-#include <linux/counter.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/fs.h>
-#include <linux/gfp.h>
-#include <linux/idr.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/module.h>
-#include <linux/printk.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/sysfs.h>
-#include <linux/types.h>
-
-const char *const counter_count_direction_str[2] = {
- [COUNTER_COUNT_DIRECTION_FORWARD] = "forward",
- [COUNTER_COUNT_DIRECTION_BACKWARD] = "backward"
-};
-EXPORT_SYMBOL_GPL(counter_count_direction_str);
-
-const char *const counter_count_mode_str[4] = {
- [COUNTER_COUNT_MODE_NORMAL] = "normal",
- [COUNTER_COUNT_MODE_RANGE_LIMIT] = "range limit",
- [COUNTER_COUNT_MODE_NON_RECYCLE] = "non-recycle",
- [COUNTER_COUNT_MODE_MODULO_N] = "modulo-n"
-};
-EXPORT_SYMBOL_GPL(counter_count_mode_str);
-
-ssize_t counter_signal_enum_read(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- char *buf)
-{
- const struct counter_signal_enum_ext *const e = priv;
- int err;
- size_t index;
-
- if (!e->get)
- return -EINVAL;
-
- err = e->get(counter, signal, &index);
- if (err)
- return err;
-
- if (index >= e->num_items)
- return -EINVAL;
-
- return sprintf(buf, "%s\n", e->items[index]);
-}
-EXPORT_SYMBOL_GPL(counter_signal_enum_read);
-
-ssize_t counter_signal_enum_write(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- const char *buf, size_t len)
-{
- const struct counter_signal_enum_ext *const e = priv;
- ssize_t index;
- int err;
-
- if (!e->set)
- return -EINVAL;
-
- index = __sysfs_match_string(e->items, e->num_items, buf);
- if (index < 0)
- return index;
-
- err = e->set(counter, signal, index);
- if (err)
- return err;
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_signal_enum_write);
-
-ssize_t counter_signal_enum_available_read(struct counter_device *counter,
- struct counter_signal *signal,
- void *priv, char *buf)
-{
- const struct counter_signal_enum_ext *const e = priv;
- size_t i;
- size_t len = 0;
-
- if (!e->num_items)
- return 0;
-
- for (i = 0; i < e->num_items; i++)
- len += sprintf(buf + len, "%s\n", e->items[i]);
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_signal_enum_available_read);
-
-ssize_t counter_count_enum_read(struct counter_device *counter,
- struct counter_count *count, void *priv,
- char *buf)
-{
- const struct counter_count_enum_ext *const e = priv;
- int err;
- size_t index;
-
- if (!e->get)
- return -EINVAL;
-
- err = e->get(counter, count, &index);
- if (err)
- return err;
-
- if (index >= e->num_items)
- return -EINVAL;
-
- return sprintf(buf, "%s\n", e->items[index]);
-}
-EXPORT_SYMBOL_GPL(counter_count_enum_read);
-
-ssize_t counter_count_enum_write(struct counter_device *counter,
- struct counter_count *count, void *priv,
- const char *buf, size_t len)
-{
- const struct counter_count_enum_ext *const e = priv;
- ssize_t index;
- int err;
-
- if (!e->set)
- return -EINVAL;
-
- index = __sysfs_match_string(e->items, e->num_items, buf);
- if (index < 0)
- return index;
-
- err = e->set(counter, count, index);
- if (err)
- return err;
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_count_enum_write);
-
-ssize_t counter_count_enum_available_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf)
-{
- const struct counter_count_enum_ext *const e = priv;
- size_t i;
- size_t len = 0;
-
- if (!e->num_items)
- return 0;
-
- for (i = 0; i < e->num_items; i++)
- len += sprintf(buf + len, "%s\n", e->items[i]);
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_count_enum_available_read);
-
-ssize_t counter_device_enum_read(struct counter_device *counter, void *priv,
- char *buf)
-{
- const struct counter_device_enum_ext *const e = priv;
- int err;
- size_t index;
-
- if (!e->get)
- return -EINVAL;
-
- err = e->get(counter, &index);
- if (err)
- return err;
-
- if (index >= e->num_items)
- return -EINVAL;
-
- return sprintf(buf, "%s\n", e->items[index]);
-}
-EXPORT_SYMBOL_GPL(counter_device_enum_read);
-
-ssize_t counter_device_enum_write(struct counter_device *counter, void *priv,
- const char *buf, size_t len)
-{
- const struct counter_device_enum_ext *const e = priv;
- ssize_t index;
- int err;
-
- if (!e->set)
- return -EINVAL;
-
- index = __sysfs_match_string(e->items, e->num_items, buf);
- if (index < 0)
- return index;
-
- err = e->set(counter, index);
- if (err)
- return err;
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_device_enum_write);
-
-ssize_t counter_device_enum_available_read(struct counter_device *counter,
- void *priv, char *buf)
-{
- const struct counter_device_enum_ext *const e = priv;
- size_t i;
- size_t len = 0;
-
- if (!e->num_items)
- return 0;
-
- for (i = 0; i < e->num_items; i++)
- len += sprintf(buf + len, "%s\n", e->items[i]);
-
- return len;
-}
-EXPORT_SYMBOL_GPL(counter_device_enum_available_read);
-
-struct counter_attr_parm {
- struct counter_device_attr_group *group;
- const char *prefix;
- const char *name;
- ssize_t (*show)(struct device *dev, struct device_attribute *attr,
- char *buf);
- ssize_t (*store)(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t len);
- void *component;
-};
-
-struct counter_device_attr {
- struct device_attribute dev_attr;
- struct list_head l;
- void *component;
-};
-
-static int counter_attribute_create(const struct counter_attr_parm *const parm)
-{
- struct counter_device_attr *counter_attr;
- struct device_attribute *dev_attr;
- int err;
- struct list_head *const attr_list = &parm->group->attr_list;
-
- /* Allocate a Counter device attribute */
- counter_attr = kzalloc(sizeof(*counter_attr), GFP_KERNEL);
- if (!counter_attr)
- return -ENOMEM;
- dev_attr = &counter_attr->dev_attr;
-
- sysfs_attr_init(&dev_attr->attr);
-
- /* Configure device attribute */
- dev_attr->attr.name = kasprintf(GFP_KERNEL, "%s%s", parm->prefix,
- parm->name);
- if (!dev_attr->attr.name) {
- err = -ENOMEM;
- goto err_free_counter_attr;
- }
- if (parm->show) {
- dev_attr->attr.mode |= 0444;
- dev_attr->show = parm->show;
- }
- if (parm->store) {
- dev_attr->attr.mode |= 0200;
- dev_attr->store = parm->store;
- }
-
- /* Store associated Counter component with attribute */
- counter_attr->component = parm->component;
-
- /* Keep track of the attribute for later cleanup */
- list_add(&counter_attr->l, attr_list);
- parm->group->num_attr++;
-
- return 0;
-
-err_free_counter_attr:
- kfree(counter_attr);
- return err;
-}
-
-#define to_counter_attr(_dev_attr) \
- container_of(_dev_attr, struct counter_device_attr, dev_attr)
-
-struct counter_signal_unit {
- struct counter_signal *signal;
-};
-
-static const char *const counter_signal_level_str[] = {
- [COUNTER_SIGNAL_LEVEL_LOW] = "low",
- [COUNTER_SIGNAL_LEVEL_HIGH] = "high"
-};
-
-static ssize_t counter_signal_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_signal_unit *const component = devattr->component;
- struct counter_signal *const signal = component->signal;
- int err;
- enum counter_signal_level level;
-
- err = counter->ops->signal_read(counter, signal, &level);
- if (err)
- return err;
-
- return sprintf(buf, "%s\n", counter_signal_level_str[level]);
-}
-
-struct counter_name_unit {
- const char *name;
-};
-
-static ssize_t counter_device_attr_name_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- const struct counter_name_unit *const comp = to_counter_attr(attr)->component;
-
- return sprintf(buf, "%s\n", comp->name);
-}
-
-static int counter_name_attribute_create(
- struct counter_device_attr_group *const group,
- const char *const name)
-{
- struct counter_name_unit *name_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Skip if no name */
- if (!name)
- return 0;
-
- /* Allocate name attribute component */
- name_comp = kmalloc(sizeof(*name_comp), GFP_KERNEL);
- if (!name_comp)
- return -ENOMEM;
- name_comp->name = name;
-
- /* Allocate Signal name attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "name";
- parm.show = counter_device_attr_name_show;
- parm.store = NULL;
- parm.component = name_comp;
- err = counter_attribute_create(&parm);
- if (err)
- goto err_free_name_comp;
-
- return 0;
-
-err_free_name_comp:
- kfree(name_comp);
- return err;
-}
-
-struct counter_signal_ext_unit {
- struct counter_signal *signal;
- const struct counter_signal_ext *ext;
-};
-
-static ssize_t counter_signal_ext_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_signal_ext_unit *const comp = devattr->component;
- const struct counter_signal_ext *const ext = comp->ext;
-
- return ext->read(dev_get_drvdata(dev), comp->signal, ext->priv, buf);
-}
-
-static ssize_t counter_signal_ext_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_signal_ext_unit *const comp = devattr->component;
- const struct counter_signal_ext *const ext = comp->ext;
-
- return ext->write(dev_get_drvdata(dev), comp->signal, ext->priv, buf,
- len);
-}
-
-static void counter_device_attr_list_free(struct list_head *attr_list)
-{
- struct counter_device_attr *p, *n;
-
- list_for_each_entry_safe(p, n, attr_list, l) {
- /* free attribute name and associated component memory */
- kfree(p->dev_attr.attr.name);
- kfree(p->component);
- list_del(&p->l);
- kfree(p);
- }
-}
-
-static int counter_signal_ext_register(
- struct counter_device_attr_group *const group,
- struct counter_signal *const signal)
-{
- const size_t num_ext = signal->num_ext;
- size_t i;
- const struct counter_signal_ext *ext;
- struct counter_signal_ext_unit *signal_ext_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Create an attribute for each extension */
- for (i = 0 ; i < num_ext; i++) {
- ext = signal->ext + i;
-
- /* Allocate signal_ext attribute component */
- signal_ext_comp = kmalloc(sizeof(*signal_ext_comp), GFP_KERNEL);
- if (!signal_ext_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- signal_ext_comp->signal = signal;
- signal_ext_comp->ext = ext;
-
- /* Allocate a Counter device attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = ext->name;
- parm.show = (ext->read) ? counter_signal_ext_show : NULL;
- parm.store = (ext->write) ? counter_signal_ext_store : NULL;
- parm.component = signal_ext_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(signal_ext_comp);
- goto err_free_attr_list;
- }
- }
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_signal_attributes_create(
- struct counter_device_attr_group *const group,
- const struct counter_device *const counter,
- struct counter_signal *const signal)
-{
- struct counter_signal_unit *signal_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Allocate Signal attribute component */
- signal_comp = kmalloc(sizeof(*signal_comp), GFP_KERNEL);
- if (!signal_comp)
- return -ENOMEM;
- signal_comp->signal = signal;
-
- /* Create main Signal attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "signal";
- parm.show = (counter->ops->signal_read) ? counter_signal_show : NULL;
- parm.store = NULL;
- parm.component = signal_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(signal_comp);
- return err;
- }
-
- /* Create Signal name attribute */
- err = counter_name_attribute_create(group, signal->name);
- if (err)
- goto err_free_attr_list;
-
- /* Register Signal extension attributes */
- err = counter_signal_ext_register(group, signal);
- if (err)
- goto err_free_attr_list;
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_signals_register(
- struct counter_device_attr_group *const groups_list,
- const struct counter_device *const counter)
-{
- const size_t num_signals = counter->num_signals;
- size_t i;
- struct counter_signal *signal;
- const char *name;
- int err;
-
- /* Register each Signal */
- for (i = 0; i < num_signals; i++) {
- signal = counter->signals + i;
-
- /* Generate Signal attribute directory name */
- name = kasprintf(GFP_KERNEL, "signal%d", signal->id);
- if (!name) {
- err = -ENOMEM;
- goto err_free_attr_groups;
- }
- groups_list[i].attr_group.name = name;
-
- /* Create all attributes associated with Signal */
- err = counter_signal_attributes_create(groups_list + i, counter,
- signal);
- if (err)
- goto err_free_attr_groups;
- }
-
- return 0;
-
-err_free_attr_groups:
- do {
- kfree(groups_list[i].attr_group.name);
- counter_device_attr_list_free(&groups_list[i].attr_list);
- } while (i--);
- return err;
-}
-
-static const char *const counter_synapse_action_str[] = {
- [COUNTER_SYNAPSE_ACTION_NONE] = "none",
- [COUNTER_SYNAPSE_ACTION_RISING_EDGE] = "rising edge",
- [COUNTER_SYNAPSE_ACTION_FALLING_EDGE] = "falling edge",
- [COUNTER_SYNAPSE_ACTION_BOTH_EDGES] = "both edges"
-};
-
-struct counter_action_unit {
- struct counter_synapse *synapse;
- struct counter_count *count;
-};
-
-static ssize_t counter_action_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_action_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- struct counter_synapse *const synapse = component->synapse;
- size_t action_index;
- enum counter_synapse_action action;
-
- err = counter->ops->action_get(counter, count, synapse, &action_index);
- if (err)
- return err;
-
- synapse->action = action_index;
-
- action = synapse->actions_list[action_index];
- return sprintf(buf, "%s\n", counter_synapse_action_str[action]);
-}
-
-static ssize_t counter_action_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_action_unit *const component = devattr->component;
- struct counter_synapse *const synapse = component->synapse;
- size_t action_index;
- const size_t num_actions = synapse->num_actions;
- enum counter_synapse_action action;
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
- struct counter_count *const count = component->count;
-
- /* Find requested action mode */
- for (action_index = 0; action_index < num_actions; action_index++) {
- action = synapse->actions_list[action_index];
- if (sysfs_streq(buf, counter_synapse_action_str[action]))
- break;
- }
- /* If requested action mode not found */
- if (action_index >= num_actions)
- return -EINVAL;
-
- err = counter->ops->action_set(counter, count, synapse, action_index);
- if (err)
- return err;
-
- synapse->action = action_index;
-
- return len;
-}
-
-struct counter_action_avail_unit {
- const enum counter_synapse_action *actions_list;
- size_t num_actions;
-};
-
-static ssize_t counter_synapse_action_available_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_action_avail_unit *const component = devattr->component;
- size_t i;
- enum counter_synapse_action action;
- ssize_t len = 0;
-
- for (i = 0; i < component->num_actions; i++) {
- action = component->actions_list[i];
- len += sprintf(buf + len, "%s\n",
- counter_synapse_action_str[action]);
- }
-
- return len;
-}
-
-static int counter_synapses_register(
- struct counter_device_attr_group *const group,
- const struct counter_device *const counter,
- struct counter_count *const count, const char *const count_attr_name)
-{
- size_t i;
- struct counter_synapse *synapse;
- const char *prefix;
- struct counter_action_unit *action_comp;
- struct counter_attr_parm parm;
- int err;
- struct counter_action_avail_unit *avail_comp;
-
- /* Register each Synapse */
- for (i = 0; i < count->num_synapses; i++) {
- synapse = count->synapses + i;
-
- /* Generate attribute prefix */
- prefix = kasprintf(GFP_KERNEL, "signal%d_",
- synapse->signal->id);
- if (!prefix) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
-
- /* Allocate action attribute component */
- action_comp = kmalloc(sizeof(*action_comp), GFP_KERNEL);
- if (!action_comp) {
- err = -ENOMEM;
- goto err_free_prefix;
- }
- action_comp->synapse = synapse;
- action_comp->count = count;
-
- /* Create action attribute */
- parm.group = group;
- parm.prefix = prefix;
- parm.name = "action";
- parm.show = (counter->ops->action_get) ? counter_action_show : NULL;
- parm.store = (counter->ops->action_set) ? counter_action_store : NULL;
- parm.component = action_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(action_comp);
- goto err_free_prefix;
- }
-
- /* Allocate action available attribute component */
- avail_comp = kmalloc(sizeof(*avail_comp), GFP_KERNEL);
- if (!avail_comp) {
- err = -ENOMEM;
- goto err_free_prefix;
- }
- avail_comp->actions_list = synapse->actions_list;
- avail_comp->num_actions = synapse->num_actions;
-
- /* Create action_available attribute */
- parm.group = group;
- parm.prefix = prefix;
- parm.name = "action_available";
- parm.show = counter_synapse_action_available_show;
- parm.store = NULL;
- parm.component = avail_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(avail_comp);
- goto err_free_prefix;
- }
-
- kfree(prefix);
- }
-
- return 0;
-
-err_free_prefix:
- kfree(prefix);
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-struct counter_count_unit {
- struct counter_count *count;
-};
-
-static ssize_t counter_count_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- int err;
- unsigned long val;
-
- err = counter->ops->count_read(counter, count, &val);
- if (err)
- return err;
-
- return sprintf(buf, "%lu\n", val);
-}
-
-static ssize_t counter_count_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- int err;
- unsigned long val;
-
- err = kstrtoul(buf, 0, &val);
- if (err)
- return err;
-
- err = counter->ops->count_write(counter, count, val);
- if (err)
- return err;
-
- return len;
-}
-
-static const char *const counter_function_str[] = {
- [COUNTER_FUNCTION_INCREASE] = "increase",
- [COUNTER_FUNCTION_DECREASE] = "decrease",
- [COUNTER_FUNCTION_PULSE_DIRECTION] = "pulse-direction",
- [COUNTER_FUNCTION_QUADRATURE_X1_A] = "quadrature x1 a",
- [COUNTER_FUNCTION_QUADRATURE_X1_B] = "quadrature x1 b",
- [COUNTER_FUNCTION_QUADRATURE_X2_A] = "quadrature x2 a",
- [COUNTER_FUNCTION_QUADRATURE_X2_B] = "quadrature x2 b",
- [COUNTER_FUNCTION_QUADRATURE_X4] = "quadrature x4"
-};
-
-static ssize_t counter_function_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- size_t func_index;
- enum counter_function function;
-
- err = counter->ops->function_get(counter, count, &func_index);
- if (err)
- return err;
-
- count->function = func_index;
-
- function = count->functions_list[func_index];
- return sprintf(buf, "%s\n", counter_function_str[function]);
-}
-
-static ssize_t counter_function_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_unit *const component = devattr->component;
- struct counter_count *const count = component->count;
- const size_t num_functions = count->num_functions;
- size_t func_index;
- enum counter_function function;
- int err;
- struct counter_device *const counter = dev_get_drvdata(dev);
-
- /* Find requested Count function mode */
- for (func_index = 0; func_index < num_functions; func_index++) {
- function = count->functions_list[func_index];
- if (sysfs_streq(buf, counter_function_str[function]))
- break;
- }
- /* Return error if requested Count function mode not found */
- if (func_index >= num_functions)
- return -EINVAL;
-
- err = counter->ops->function_set(counter, count, func_index);
- if (err)
- return err;
-
- count->function = func_index;
-
- return len;
-}
-
-struct counter_count_ext_unit {
- struct counter_count *count;
- const struct counter_count_ext *ext;
-};
-
-static ssize_t counter_count_ext_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_ext_unit *const comp = devattr->component;
- const struct counter_count_ext *const ext = comp->ext;
-
- return ext->read(dev_get_drvdata(dev), comp->count, ext->priv, buf);
-}
-
-static ssize_t counter_count_ext_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_count_ext_unit *const comp = devattr->component;
- const struct counter_count_ext *const ext = comp->ext;
-
- return ext->write(dev_get_drvdata(dev), comp->count, ext->priv, buf,
- len);
-}
-
-static int counter_count_ext_register(
- struct counter_device_attr_group *const group,
- struct counter_count *const count)
-{
- size_t i;
- const struct counter_count_ext *ext;
- struct counter_count_ext_unit *count_ext_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Create an attribute for each extension */
- for (i = 0 ; i < count->num_ext; i++) {
- ext = count->ext + i;
-
- /* Allocate count_ext attribute component */
- count_ext_comp = kmalloc(sizeof(*count_ext_comp), GFP_KERNEL);
- if (!count_ext_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- count_ext_comp->count = count;
- count_ext_comp->ext = ext;
-
- /* Allocate count_ext attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = ext->name;
- parm.show = (ext->read) ? counter_count_ext_show : NULL;
- parm.store = (ext->write) ? counter_count_ext_store : NULL;
- parm.component = count_ext_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(count_ext_comp);
- goto err_free_attr_list;
- }
- }
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-struct counter_func_avail_unit {
- const enum counter_function *functions_list;
- size_t num_functions;
-};
-
-static ssize_t counter_function_available_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_func_avail_unit *const component = devattr->component;
- const enum counter_function *const func_list = component->functions_list;
- const size_t num_functions = component->num_functions;
- size_t i;
- enum counter_function function;
- ssize_t len = 0;
-
- for (i = 0; i < num_functions; i++) {
- function = func_list[i];
- len += sprintf(buf + len, "%s\n",
- counter_function_str[function]);
- }
-
- return len;
-}
-
-static int counter_count_attributes_create(
- struct counter_device_attr_group *const group,
- const struct counter_device *const counter,
- struct counter_count *const count)
-{
- struct counter_count_unit *count_comp;
- struct counter_attr_parm parm;
- int err;
- struct counter_count_unit *func_comp;
- struct counter_func_avail_unit *avail_comp;
-
- /* Allocate count attribute component */
- count_comp = kmalloc(sizeof(*count_comp), GFP_KERNEL);
- if (!count_comp)
- return -ENOMEM;
- count_comp->count = count;
-
- /* Create main Count attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "count";
- parm.show = (counter->ops->count_read) ? counter_count_show : NULL;
- parm.store = (counter->ops->count_write) ? counter_count_store : NULL;
- parm.component = count_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(count_comp);
- return err;
- }
-
- /* Allocate function attribute component */
- func_comp = kmalloc(sizeof(*func_comp), GFP_KERNEL);
- if (!func_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- func_comp->count = count;
-
- /* Create Count function attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "function";
- parm.show = (counter->ops->function_get) ? counter_function_show : NULL;
- parm.store = (counter->ops->function_set) ? counter_function_store : NULL;
- parm.component = func_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(func_comp);
- goto err_free_attr_list;
- }
-
- /* Allocate function available attribute component */
- avail_comp = kmalloc(sizeof(*avail_comp), GFP_KERNEL);
- if (!avail_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
- avail_comp->functions_list = count->functions_list;
- avail_comp->num_functions = count->num_functions;
-
- /* Create Count function_available attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = "function_available";
- parm.show = counter_function_available_show;
- parm.store = NULL;
- parm.component = avail_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(avail_comp);
- goto err_free_attr_list;
- }
-
- /* Create Count name attribute */
- err = counter_name_attribute_create(group, count->name);
- if (err)
- goto err_free_attr_list;
-
- /* Register Count extension attributes */
- err = counter_count_ext_register(group, count);
- if (err)
- goto err_free_attr_list;
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_counts_register(
- struct counter_device_attr_group *const groups_list,
- const struct counter_device *const counter)
-{
- size_t i;
- struct counter_count *count;
- const char *name;
- int err;
-
- /* Register each Count */
- for (i = 0; i < counter->num_counts; i++) {
- count = counter->counts + i;
-
- /* Generate Count attribute directory name */
- name = kasprintf(GFP_KERNEL, "count%d", count->id);
- if (!name) {
- err = -ENOMEM;
- goto err_free_attr_groups;
- }
- groups_list[i].attr_group.name = name;
-
- /* Register the Synapses associated with each Count */
- err = counter_synapses_register(groups_list + i, counter, count,
- name);
- if (err)
- goto err_free_attr_groups;
-
- /* Create all attributes associated with Count */
- err = counter_count_attributes_create(groups_list + i, counter,
- count);
- if (err)
- goto err_free_attr_groups;
- }
-
- return 0;
-
-err_free_attr_groups:
- do {
- kfree(groups_list[i].attr_group.name);
- counter_device_attr_list_free(&groups_list[i].attr_list);
- } while (i--);
- return err;
-}
-
-struct counter_size_unit {
- size_t size;
-};
-
-static ssize_t counter_device_attr_size_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- const struct counter_size_unit *const comp = to_counter_attr(attr)->component;
-
- return sprintf(buf, "%zu\n", comp->size);
-}
-
-static int counter_size_attribute_create(
- struct counter_device_attr_group *const group,
- const size_t size, const char *const name)
-{
- struct counter_size_unit *size_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Allocate size attribute component */
- size_comp = kmalloc(sizeof(*size_comp), GFP_KERNEL);
- if (!size_comp)
- return -ENOMEM;
- size_comp->size = size;
-
- parm.group = group;
- parm.prefix = "";
- parm.name = name;
- parm.show = counter_device_attr_size_show;
- parm.store = NULL;
- parm.component = size_comp;
- err = counter_attribute_create(&parm);
- if (err)
- goto err_free_size_comp;
-
- return 0;
-
-err_free_size_comp:
- kfree(size_comp);
- return err;
-}
-
-struct counter_ext_unit {
- const struct counter_device_ext *ext;
-};
-
-static ssize_t counter_device_ext_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_ext_unit *const component = devattr->component;
- const struct counter_device_ext *const ext = component->ext;
-
- return ext->read(dev_get_drvdata(dev), ext->priv, buf);
-}
-
-static ssize_t counter_device_ext_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- const struct counter_device_attr *const devattr = to_counter_attr(attr);
- const struct counter_ext_unit *const component = devattr->component;
- const struct counter_device_ext *const ext = component->ext;
-
- return ext->write(dev_get_drvdata(dev), ext->priv, buf, len);
-}
-
-static int counter_device_ext_register(
- struct counter_device_attr_group *const group,
- struct counter_device *const counter)
-{
- size_t i;
- struct counter_ext_unit *ext_comp;
- struct counter_attr_parm parm;
- int err;
-
- /* Create an attribute for each extension */
- for (i = 0 ; i < counter->num_ext; i++) {
- /* Allocate extension attribute component */
- ext_comp = kmalloc(sizeof(*ext_comp), GFP_KERNEL);
- if (!ext_comp) {
- err = -ENOMEM;
- goto err_free_attr_list;
- }
-
- ext_comp->ext = counter->ext + i;
-
- /* Allocate extension attribute */
- parm.group = group;
- parm.prefix = "";
- parm.name = counter->ext[i].name;
- parm.show = (counter->ext[i].read) ? counter_device_ext_show : NULL;
- parm.store = (counter->ext[i].write) ? counter_device_ext_store : NULL;
- parm.component = ext_comp;
- err = counter_attribute_create(&parm);
- if (err) {
- kfree(ext_comp);
- goto err_free_attr_list;
- }
- }
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static int counter_global_attr_register(
- struct counter_device_attr_group *const group,
- struct counter_device *const counter)
-{
- int err;
-
- /* Create name attribute */
- err = counter_name_attribute_create(group, counter->name);
- if (err)
- return err;
-
- /* Create num_counts attribute */
- err = counter_size_attribute_create(group, counter->num_counts,
- "num_counts");
- if (err)
- goto err_free_attr_list;
-
- /* Create num_signals attribute */
- err = counter_size_attribute_create(group, counter->num_signals,
- "num_signals");
- if (err)
- goto err_free_attr_list;
-
- /* Register Counter device extension attributes */
- err = counter_device_ext_register(group, counter);
- if (err)
- goto err_free_attr_list;
-
- return 0;
-
-err_free_attr_list:
- counter_device_attr_list_free(&group->attr_list);
- return err;
-}
-
-static void counter_device_groups_list_free(
- struct counter_device_attr_group *const groups_list,
- const size_t num_groups)
-{
- struct counter_device_attr_group *group;
- size_t i;
-
- /* loop through all attribute groups (signals, counts, global, etc.) */
- for (i = 0; i < num_groups; i++) {
- group = groups_list + i;
-
- /* free all attribute group and associated attributes memory */
- kfree(group->attr_group.name);
- kfree(group->attr_group.attrs);
- counter_device_attr_list_free(&group->attr_list);
- }
-
- kfree(groups_list);
-}
-
-static int counter_device_groups_list_prepare(
- struct counter_device *const counter)
-{
- const size_t total_num_groups =
- counter->num_signals + counter->num_counts + 1;
- struct counter_device_attr_group *groups_list;
- size_t i;
- int err;
- size_t num_groups = 0;
-
- /* Allocate space for attribute groups (signals, counts, and ext) */
- groups_list = kcalloc(total_num_groups, sizeof(*groups_list),
- GFP_KERNEL);
- if (!groups_list)
- return -ENOMEM;
-
- /* Initialize attribute lists */
- for (i = 0; i < total_num_groups; i++)
- INIT_LIST_HEAD(&groups_list[i].attr_list);
-
- /* Register Signals */
- err = counter_signals_register(groups_list, counter);
- if (err)
- goto err_free_groups_list;
- num_groups += counter->num_signals;
-
- /* Register Counts and respective Synapses */
- err = counter_counts_register(groups_list + num_groups, counter);
- if (err)
- goto err_free_groups_list;
- num_groups += counter->num_counts;
-
- /* Register Counter global attributes */
- err = counter_global_attr_register(groups_list + num_groups, counter);
- if (err)
- goto err_free_groups_list;
- num_groups++;
-
- /* Store groups_list in device_state */
- counter->device_state->groups_list = groups_list;
- counter->device_state->num_groups = num_groups;
-
- return 0;
-
-err_free_groups_list:
- counter_device_groups_list_free(groups_list, num_groups);
- return err;
-}
-
-static int counter_device_groups_prepare(
- struct counter_device_state *const device_state)
-{
- size_t i, j;
- struct counter_device_attr_group *group;
- int err;
- struct counter_device_attr *p;
-
- /* Allocate attribute groups for association with device */
- device_state->groups = kcalloc(device_state->num_groups + 1,
- sizeof(*device_state->groups),
- GFP_KERNEL);
- if (!device_state->groups)
- return -ENOMEM;
-
- /* Prepare each group of attributes for association */
- for (i = 0; i < device_state->num_groups; i++) {
- group = device_state->groups_list + i;
-
- /* Allocate space for attribute pointers in attribute group */
- group->attr_group.attrs = kcalloc(group->num_attr + 1,
- sizeof(*group->attr_group.attrs), GFP_KERNEL);
- if (!group->attr_group.attrs) {
- err = -ENOMEM;
- goto err_free_groups;
- }
-
- /* Add attribute pointers to attribute group */
- j = 0;
- list_for_each_entry(p, &group->attr_list, l)
- group->attr_group.attrs[j++] = &p->dev_attr.attr;
-
- /* Group attributes in attribute group */
- device_state->groups[i] = &group->attr_group;
- }
- /* Associate attributes with device */
- device_state->dev.groups = device_state->groups;
-
- return 0;
-
-err_free_groups:
- do {
- group = device_state->groups_list + i;
- kfree(group->attr_group.attrs);
- group->attr_group.attrs = NULL;
- } while (i--);
- kfree(device_state->groups);
- return err;
-}
-
-/* Provides a unique ID for each counter device */
-static DEFINE_IDA(counter_ida);
-
-static void counter_device_release(struct device *dev)
-{
- struct counter_device *const counter = dev_get_drvdata(dev);
- struct counter_device_state *const device_state = counter->device_state;
-
- kfree(device_state->groups);
- counter_device_groups_list_free(device_state->groups_list,
- device_state->num_groups);
- ida_simple_remove(&counter_ida, device_state->id);
- kfree(device_state);
-}
-
-static struct device_type counter_device_type = {
- .name = "counter_device",
- .release = counter_device_release
-};
-
-static struct bus_type counter_bus_type = {
- .name = "counter"
-};
-
-/**
- * counter_register - register Counter to the system
- * @counter: pointer to Counter to register
- *
- * This function registers a Counter to the system. A sysfs "counter" directory
- * will be created and populated with sysfs attributes correlating with the
- * Counter Signals, Synapses, and Counts respectively.
- */
-int counter_register(struct counter_device *const counter)
-{
- struct counter_device_state *device_state;
- int err;
-
- /* Allocate internal state container for Counter device */
- device_state = kzalloc(sizeof(*device_state), GFP_KERNEL);
- if (!device_state)
- return -ENOMEM;
- counter->device_state = device_state;
-
- /* Acquire unique ID */
- device_state->id = ida_simple_get(&counter_ida, 0, 0, GFP_KERNEL);
- if (device_state->id < 0) {
- err = device_state->id;
- goto err_free_device_state;
- }
-
- /* Configure device structure for Counter */
- device_state->dev.type = &counter_device_type;
- device_state->dev.bus = &counter_bus_type;
- if (counter->parent) {
- device_state->dev.parent = counter->parent;
- device_state->dev.of_node = counter->parent->of_node;
- }
- dev_set_name(&device_state->dev, "counter%d", device_state->id);
- device_initialize(&device_state->dev);
- dev_set_drvdata(&device_state->dev, counter);
-
- /* Prepare device attributes */
- err = counter_device_groups_list_prepare(counter);
- if (err)
- goto err_free_id;
-
- /* Organize device attributes to groups and match to device */
- err = counter_device_groups_prepare(device_state);
- if (err)
- goto err_free_groups_list;
-
- /* Add device to system */
- err = device_add(&device_state->dev);
- if (err)
- goto err_free_groups;
-
- return 0;
-
-err_free_groups:
- kfree(device_state->groups);
-err_free_groups_list:
- counter_device_groups_list_free(device_state->groups_list,
- device_state->num_groups);
-err_free_id:
- ida_simple_remove(&counter_ida, device_state->id);
-err_free_device_state:
- kfree(device_state);
- return err;
-}
-EXPORT_SYMBOL_GPL(counter_register);
-
-/**
- * counter_unregister - unregister Counter from the system
- * @counter: pointer to Counter to unregister
- *
- * The Counter is unregistered from the system; all allocated memory is freed.
- */
-void counter_unregister(struct counter_device *const counter)
-{
- if (counter)
- device_del(&counter->device_state->dev);
-}
-EXPORT_SYMBOL_GPL(counter_unregister);
-
-static void devm_counter_unreg(struct device *dev, void *res)
-{
- counter_unregister(*(struct counter_device **)res);
-}
-
-/**
- * devm_counter_register - Resource-managed counter_register
- * @dev: device to allocate counter_device for
- * @counter: pointer to Counter to register
- *
- * Managed counter_register. The Counter registered with this function is
- * automatically unregistered on driver detach. This function calls
- * counter_register internally. Refer to that function for more information.
- *
- * If an Counter registered with this function needs to be unregistered
- * separately, devm_counter_unregister must be used.
- *
- * RETURNS:
- * 0 on success, negative error number on failure.
- */
-int devm_counter_register(struct device *dev,
- struct counter_device *const counter)
-{
- struct counter_device **ptr;
- int ret;
-
- ptr = devres_alloc(devm_counter_unreg, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return -ENOMEM;
-
- ret = counter_register(counter);
- if (!ret) {
- *ptr = counter;
- devres_add(dev, ptr);
- } else {
- devres_free(ptr);
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(devm_counter_register);
-
-static int devm_counter_match(struct device *dev, void *res, void *data)
-{
- struct counter_device **r = res;
-
- if (!r || !*r) {
- WARN_ON(!r || !*r);
- return 0;
- }
-
- return *r == data;
-}
-
-/**
- * devm_counter_unregister - Resource-managed counter_unregister
- * @dev: device this counter_device belongs to
- * @counter: pointer to Counter associated with the device
- *
- * Unregister Counter registered with devm_counter_register.
- */
-void devm_counter_unregister(struct device *dev,
- struct counter_device *const counter)
-{
- int rc;
-
- rc = devres_release(dev, devm_counter_unreg, devm_counter_match,
- counter);
- WARN_ON(rc);
-}
-EXPORT_SYMBOL_GPL(devm_counter_unregister);
-
-static int __init counter_init(void)
-{
- return bus_register(&counter_bus_type);
-}
-
-static void __exit counter_exit(void)
-{
- bus_unregister(&counter_bus_type);
-}
-
-subsys_initcall(counter_init);
-module_exit(counter_exit);
-
-MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
-MODULE_DESCRIPTION("Generic Counter interface");
-MODULE_LICENSE("GPL v2");
#include <linux/mutex.h>
#include <linux/counter.h>
#include <linux/bitfield.h>
+#include <linux/types.h>
#define FTM_FIELD_UPDATE(ftm, offset, mask, val) \
({ \
}
static int ftm_quaddec_get_prescaler(struct counter_device *counter,
- struct counter_count *count,
- size_t *cnt_mode)
+ struct counter_count *count, u32 *cnt_mode)
{
struct ftm_quaddec *ftm = counter->priv;
uint32_t scflags;
}
static int ftm_quaddec_set_prescaler(struct counter_device *counter,
- struct counter_count *count,
- size_t cnt_mode)
+ struct counter_count *count, u32 cnt_mode)
{
struct ftm_quaddec *ftm = counter->priv;
"1", "2", "4", "8", "16", "32", "64", "128"
};
-static struct counter_count_enum_ext ftm_quaddec_prescaler_enum = {
- .items = ftm_quaddec_prescaler,
- .num_items = ARRAY_SIZE(ftm_quaddec_prescaler),
- .get = ftm_quaddec_get_prescaler,
- .set = ftm_quaddec_set_prescaler
-};
-
-enum ftm_quaddec_synapse_action {
- FTM_QUADDEC_SYNAPSE_ACTION_BOTH_EDGES,
-};
-
static const enum counter_synapse_action ftm_quaddec_synapse_actions[] = {
- [FTM_QUADDEC_SYNAPSE_ACTION_BOTH_EDGES] =
COUNTER_SYNAPSE_ACTION_BOTH_EDGES
};
-enum ftm_quaddec_count_function {
- FTM_QUADDEC_COUNT_ENCODER_MODE_1,
-};
-
static const enum counter_function ftm_quaddec_count_functions[] = {
- [FTM_QUADDEC_COUNT_ENCODER_MODE_1] = COUNTER_FUNCTION_QUADRATURE_X4
+ COUNTER_FUNCTION_QUADRATURE_X4
};
static int ftm_quaddec_count_read(struct counter_device *counter,
struct counter_count *count,
- unsigned long *val)
+ u64 *val)
{
struct ftm_quaddec *const ftm = counter->priv;
uint32_t cntval;
static int ftm_quaddec_count_write(struct counter_device *counter,
struct counter_count *count,
- const unsigned long val)
+ const u64 val)
{
struct ftm_quaddec *const ftm = counter->priv;
return 0;
}
-static int ftm_quaddec_count_function_get(struct counter_device *counter,
- struct counter_count *count,
- size_t *function)
+static int ftm_quaddec_count_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
- *function = FTM_QUADDEC_COUNT_ENCODER_MODE_1;
+ *function = COUNTER_FUNCTION_QUADRATURE_X4;
return 0;
}
-static int ftm_quaddec_action_get(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t *action)
+static int ftm_quaddec_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
- *action = FTM_QUADDEC_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
return 0;
}
static const struct counter_ops ftm_quaddec_cnt_ops = {
.count_read = ftm_quaddec_count_read,
.count_write = ftm_quaddec_count_write,
- .function_get = ftm_quaddec_count_function_get,
- .action_get = ftm_quaddec_action_get,
+ .function_read = ftm_quaddec_count_function_read,
+ .action_read = ftm_quaddec_action_read,
};
static struct counter_signal ftm_quaddec_signals[] = {
}
};
-static const struct counter_count_ext ftm_quaddec_count_ext[] = {
- COUNTER_COUNT_ENUM("prescaler", &ftm_quaddec_prescaler_enum),
- COUNTER_COUNT_ENUM_AVAILABLE("prescaler", &ftm_quaddec_prescaler_enum),
+static DEFINE_COUNTER_ENUM(ftm_quaddec_prescaler_enum, ftm_quaddec_prescaler);
+
+static struct counter_comp ftm_quaddec_count_ext[] = {
+ COUNTER_COMP_COUNT_ENUM("prescaler", ftm_quaddec_get_prescaler,
+ ftm_quaddec_set_prescaler,
+ ftm_quaddec_prescaler_enum),
};
static struct counter_count ftm_quaddec_counts = {
#define INTEL_QEP_CLK_PERIOD_NS 10
-#define INTEL_QEP_COUNTER_EXT_RW(_name) \
-{ \
- .name = #_name, \
- .read = _name##_read, \
- .write = _name##_write, \
-}
-
struct intel_qep {
struct counter_device counter;
struct mutex lock;
}
static int intel_qep_count_read(struct counter_device *counter,
- struct counter_count *count,
- unsigned long *val)
+ struct counter_count *count, u64 *val)
{
struct intel_qep *const qep = counter->priv;
COUNTER_FUNCTION_QUADRATURE_X4,
};
-static int intel_qep_function_get(struct counter_device *counter,
- struct counter_count *count,
- size_t *function)
+static int intel_qep_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
- *function = 0;
+ *function = COUNTER_FUNCTION_QUADRATURE_X4;
return 0;
}
COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
};
-static int intel_qep_action_get(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t *action)
+static int intel_qep_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
- *action = 0;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
return 0;
}
static const struct counter_ops intel_qep_counter_ops = {
.count_read = intel_qep_count_read,
- .function_get = intel_qep_function_get,
- .action_get = intel_qep_action_get,
+ .function_read = intel_qep_function_read,
+ .action_read = intel_qep_action_read,
};
#define INTEL_QEP_SIGNAL(_id, _name) { \
INTEL_QEP_SYNAPSE(2),
};
-static ssize_t ceiling_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf)
+static int intel_qep_ceiling_read(struct counter_device *counter,
+ struct counter_count *count, u64 *ceiling)
{
struct intel_qep *qep = counter->priv;
- u32 reg;
pm_runtime_get_sync(qep->dev);
- reg = intel_qep_readl(qep, INTEL_QEPMAX);
+ *ceiling = intel_qep_readl(qep, INTEL_QEPMAX);
pm_runtime_put(qep->dev);
- return sysfs_emit(buf, "%u\n", reg);
+ return 0;
}
-static ssize_t ceiling_write(struct counter_device *counter,
- struct counter_count *count,
- void *priv, const char *buf, size_t len)
+static int intel_qep_ceiling_write(struct counter_device *counter,
+ struct counter_count *count, u64 max)
{
struct intel_qep *qep = counter->priv;
- u32 max;
- int ret;
+ int ret = 0;
- ret = kstrtou32(buf, 0, &max);
- if (ret < 0)
- return ret;
+ /* Intel QEP ceiling configuration only supports 32-bit values */
+ if (max != (u32)max)
+ return -ERANGE;
mutex_lock(&qep->lock);
if (qep->enabled) {
pm_runtime_get_sync(qep->dev);
intel_qep_writel(qep, INTEL_QEPMAX, max);
pm_runtime_put(qep->dev);
- ret = len;
out:
mutex_unlock(&qep->lock);
return ret;
}
-static ssize_t enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf)
+static int intel_qep_enable_read(struct counter_device *counter,
+ struct counter_count *count, u8 *enable)
{
struct intel_qep *qep = counter->priv;
- return sysfs_emit(buf, "%u\n", qep->enabled);
+ *enable = qep->enabled;
+
+ return 0;
}
-static ssize_t enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *priv, const char *buf, size_t len)
+static int intel_qep_enable_write(struct counter_device *counter,
+ struct counter_count *count, u8 val)
{
struct intel_qep *qep = counter->priv;
u32 reg;
- bool val, changed;
- int ret;
-
- ret = kstrtobool(buf, &val);
- if (ret)
- return ret;
+ bool changed;
mutex_lock(&qep->lock);
changed = val ^ qep->enabled;
out:
mutex_unlock(&qep->lock);
- return len;
+ return 0;
}
-static ssize_t spike_filter_ns_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf)
+static int intel_qep_spike_filter_ns_read(struct counter_device *counter,
+ struct counter_count *count,
+ u64 *length)
{
struct intel_qep *qep = counter->priv;
u32 reg;
reg = intel_qep_readl(qep, INTEL_QEPCON);
if (!(reg & INTEL_QEPCON_FLT_EN)) {
pm_runtime_put(qep->dev);
- return sysfs_emit(buf, "0\n");
+ return 0;
}
reg = INTEL_QEPFLT_MAX_COUNT(intel_qep_readl(qep, INTEL_QEPFLT));
pm_runtime_put(qep->dev);
- return sysfs_emit(buf, "%u\n", (reg + 2) * INTEL_QEP_CLK_PERIOD_NS);
+ *length = (reg + 2) * INTEL_QEP_CLK_PERIOD_NS;
+
+ return 0;
}
-static ssize_t spike_filter_ns_write(struct counter_device *counter,
- struct counter_count *count,
- void *priv, const char *buf, size_t len)
+static int intel_qep_spike_filter_ns_write(struct counter_device *counter,
+ struct counter_count *count,
+ u64 length)
{
struct intel_qep *qep = counter->priv;
- u32 reg, length;
+ u32 reg;
bool enable;
- int ret;
-
- ret = kstrtou32(buf, 0, &length);
- if (ret < 0)
- return ret;
+ int ret = 0;
/*
* Spike filter length is (MAX_COUNT + 2) clock periods.
* Disable filter when userspace writes 0, enable for valid
* nanoseconds values and error out otherwise.
*/
- length /= INTEL_QEP_CLK_PERIOD_NS;
+ do_div(length, INTEL_QEP_CLK_PERIOD_NS);
if (length == 0) {
enable = false;
length = 0;
intel_qep_writel(qep, INTEL_QEPFLT, length);
intel_qep_writel(qep, INTEL_QEPCON, reg);
pm_runtime_put(qep->dev);
- ret = len;
out:
mutex_unlock(&qep->lock);
return ret;
}
-static ssize_t preset_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf)
+static int intel_qep_preset_enable_read(struct counter_device *counter,
+ struct counter_count *count,
+ u8 *preset_enable)
{
struct intel_qep *qep = counter->priv;
u32 reg;
pm_runtime_get_sync(qep->dev);
reg = intel_qep_readl(qep, INTEL_QEPCON);
pm_runtime_put(qep->dev);
- return sysfs_emit(buf, "%u\n", !(reg & INTEL_QEPCON_COUNT_RST_MODE));
+
+ *preset_enable = !(reg & INTEL_QEPCON_COUNT_RST_MODE);
+
+ return 0;
}
-static ssize_t preset_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *priv, const char *buf, size_t len)
+static int intel_qep_preset_enable_write(struct counter_device *counter,
+ struct counter_count *count, u8 val)
{
struct intel_qep *qep = counter->priv;
u32 reg;
- bool val;
- int ret;
-
- ret = kstrtobool(buf, &val);
- if (ret)
- return ret;
+ int ret = 0;
mutex_lock(&qep->lock);
if (qep->enabled) {
intel_qep_writel(qep, INTEL_QEPCON, reg);
pm_runtime_put(qep->dev);
- ret = len;
out:
mutex_unlock(&qep->lock);
return ret;
}
-static const struct counter_count_ext intel_qep_count_ext[] = {
- INTEL_QEP_COUNTER_EXT_RW(ceiling),
- INTEL_QEP_COUNTER_EXT_RW(enable),
- INTEL_QEP_COUNTER_EXT_RW(spike_filter_ns),
- INTEL_QEP_COUNTER_EXT_RW(preset_enable)
+static struct counter_comp intel_qep_count_ext[] = {
+ COUNTER_COMP_ENABLE(intel_qep_enable_read, intel_qep_enable_write),
+ COUNTER_COMP_CEILING(intel_qep_ceiling_read, intel_qep_ceiling_write),
+ COUNTER_COMP_PRESET_ENABLE(intel_qep_preset_enable_read,
+ intel_qep_preset_enable_write),
+ COUNTER_COMP_COUNT_U64("spike_filter_ns",
+ intel_qep_spike_filter_ns_read,
+ intel_qep_spike_filter_ns_write),
};
static struct counter_count intel_qep_counter_count[] = {
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/types.h>
#define INTERRUPT_CNT_NAME "interrupt-cnt"
return IRQ_HANDLED;
}
-static ssize_t interrupt_cnt_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int interrupt_cnt_enable_read(struct counter_device *counter,
+ struct counter_count *count, u8 *enable)
{
struct interrupt_cnt_priv *priv = counter->priv;
- return sysfs_emit(buf, "%d\n", priv->enabled);
+ *enable = priv->enabled;
+
+ return 0;
}
-static ssize_t interrupt_cnt_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *private, const char *buf,
- size_t len)
+static int interrupt_cnt_enable_write(struct counter_device *counter,
+ struct counter_count *count, u8 enable)
{
struct interrupt_cnt_priv *priv = counter->priv;
- bool enable;
- ssize_t ret;
-
- ret = kstrtobool(buf, &enable);
- if (ret)
- return ret;
if (priv->enabled == enable)
- return len;
+ return 0;
if (enable) {
priv->enabled = true;
priv->enabled = false;
}
- return len;
+ return 0;
}
-static const struct counter_count_ext interrupt_cnt_ext[] = {
- {
- .name = "enable",
- .read = interrupt_cnt_enable_read,
- .write = interrupt_cnt_enable_write,
- },
+static struct counter_comp interrupt_cnt_ext[] = {
+ COUNTER_COMP_ENABLE(interrupt_cnt_enable_read,
+ interrupt_cnt_enable_write),
};
static const enum counter_synapse_action interrupt_cnt_synapse_actions[] = {
COUNTER_SYNAPSE_ACTION_RISING_EDGE,
};
-static int interrupt_cnt_action_get(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t *action)
+static int interrupt_cnt_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
- *action = 0;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
return 0;
}
static int interrupt_cnt_read(struct counter_device *counter,
- struct counter_count *count, unsigned long *val)
+ struct counter_count *count, u64 *val)
{
struct interrupt_cnt_priv *priv = counter->priv;
}
static int interrupt_cnt_write(struct counter_device *counter,
- struct counter_count *count,
- const unsigned long val)
+ struct counter_count *count, const u64 val)
{
struct interrupt_cnt_priv *priv = counter->priv;
COUNTER_FUNCTION_INCREASE,
};
-static int interrupt_cnt_function_get(struct counter_device *counter,
- struct counter_count *count,
- size_t *function)
+static int interrupt_cnt_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
- *function = 0;
+ *function = COUNTER_FUNCTION_INCREASE;
return 0;
}
}
static const struct counter_ops interrupt_cnt_ops = {
- .action_get = interrupt_cnt_action_get,
+ .action_read = interrupt_cnt_action_read,
.count_read = interrupt_cnt_read,
.count_write = interrupt_cnt_write,
- .function_get = interrupt_cnt_function_get,
+ .function_read = interrupt_cnt_function_read,
.signal_read = interrupt_cnt_signal_read,
};
bool trig_inverted;
};
-enum mchp_tc_count_function {
- MCHP_TC_FUNCTION_INCREASE,
- MCHP_TC_FUNCTION_QUADRATURE,
-};
-
static const enum counter_function mchp_tc_count_functions[] = {
- [MCHP_TC_FUNCTION_INCREASE] = COUNTER_FUNCTION_INCREASE,
- [MCHP_TC_FUNCTION_QUADRATURE] = COUNTER_FUNCTION_QUADRATURE_X4,
-};
-
-enum mchp_tc_synapse_action {
- MCHP_TC_SYNAPSE_ACTION_NONE = 0,
- MCHP_TC_SYNAPSE_ACTION_RISING_EDGE,
- MCHP_TC_SYNAPSE_ACTION_FALLING_EDGE,
- MCHP_TC_SYNAPSE_ACTION_BOTH_EDGE
+ COUNTER_FUNCTION_INCREASE,
+ COUNTER_FUNCTION_QUADRATURE_X4,
};
static const enum counter_synapse_action mchp_tc_synapse_actions[] = {
- [MCHP_TC_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
- [MCHP_TC_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- [MCHP_TC_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
- [MCHP_TC_SYNAPSE_ACTION_BOTH_EDGE] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
};
static struct counter_signal mchp_tc_count_signals[] = {
}
};
-static int mchp_tc_count_function_get(struct counter_device *counter,
- struct counter_count *count,
- size_t *function)
+static int mchp_tc_count_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
struct mchp_tc_data *const priv = counter->priv;
if (priv->qdec_mode)
- *function = MCHP_TC_FUNCTION_QUADRATURE;
+ *function = COUNTER_FUNCTION_QUADRATURE_X4;
else
- *function = MCHP_TC_FUNCTION_INCREASE;
+ *function = COUNTER_FUNCTION_INCREASE;
return 0;
}
-static int mchp_tc_count_function_set(struct counter_device *counter,
- struct counter_count *count,
- size_t function)
+static int mchp_tc_count_function_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function function)
{
struct mchp_tc_data *const priv = counter->priv;
u32 bmr, cmr;
cmr &= ~ATMEL_TC_WAVE;
switch (function) {
- case MCHP_TC_FUNCTION_INCREASE:
+ case COUNTER_FUNCTION_INCREASE:
priv->qdec_mode = 0;
/* Set highest rate based on whether soc has gclk or not */
bmr &= ~(ATMEL_TC_QDEN | ATMEL_TC_POSEN);
cmr |= ATMEL_TC_CMR_MASK;
cmr &= ~(ATMEL_TC_ABETRG | ATMEL_TC_XC0);
break;
- case MCHP_TC_FUNCTION_QUADRATURE:
+ case COUNTER_FUNCTION_QUADRATURE_X4:
if (!priv->tc_cfg->has_qdec)
return -EINVAL;
/* In QDEC mode settings both channels 0 and 1 are required */
return 0;
}
-static int mchp_tc_count_action_get(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t *action)
+static int mchp_tc_count_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
struct mchp_tc_data *const priv = counter->priv;
u32 cmr;
switch (cmr & ATMEL_TC_ETRGEDG) {
default:
- *action = MCHP_TC_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
break;
case ATMEL_TC_ETRGEDG_RISING:
- *action = MCHP_TC_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
break;
case ATMEL_TC_ETRGEDG_FALLING:
- *action = MCHP_TC_SYNAPSE_ACTION_FALLING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_FALLING_EDGE;
break;
case ATMEL_TC_ETRGEDG_BOTH:
- *action = MCHP_TC_SYNAPSE_ACTION_BOTH_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
break;
}
return 0;
}
-static int mchp_tc_count_action_set(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t action)
+static int mchp_tc_count_action_write(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action action)
{
struct mchp_tc_data *const priv = counter->priv;
u32 edge = ATMEL_TC_ETRGEDG_NONE;
return -EINVAL;
switch (action) {
- case MCHP_TC_SYNAPSE_ACTION_NONE:
+ case COUNTER_SYNAPSE_ACTION_NONE:
edge = ATMEL_TC_ETRGEDG_NONE;
break;
- case MCHP_TC_SYNAPSE_ACTION_RISING_EDGE:
+ case COUNTER_SYNAPSE_ACTION_RISING_EDGE:
edge = ATMEL_TC_ETRGEDG_RISING;
break;
- case MCHP_TC_SYNAPSE_ACTION_FALLING_EDGE:
+ case COUNTER_SYNAPSE_ACTION_FALLING_EDGE:
edge = ATMEL_TC_ETRGEDG_FALLING;
break;
- case MCHP_TC_SYNAPSE_ACTION_BOTH_EDGE:
+ case COUNTER_SYNAPSE_ACTION_BOTH_EDGES:
edge = ATMEL_TC_ETRGEDG_BOTH;
break;
default:
}
static int mchp_tc_count_read(struct counter_device *counter,
- struct counter_count *count,
- unsigned long *val)
+ struct counter_count *count, u64 *val)
{
struct mchp_tc_data *const priv = counter->priv;
u32 cnt;
};
static const struct counter_ops mchp_tc_ops = {
- .signal_read = mchp_tc_count_signal_read,
- .count_read = mchp_tc_count_read,
- .function_get = mchp_tc_count_function_get,
- .function_set = mchp_tc_count_function_set,
- .action_get = mchp_tc_count_action_get,
- .action_set = mchp_tc_count_action_set
+ .signal_read = mchp_tc_count_signal_read,
+ .count_read = mchp_tc_count_read,
+ .function_read = mchp_tc_count_function_read,
+ .function_write = mchp_tc_count_function_write,
+ .action_read = mchp_tc_count_action_read,
+ .action_write = mchp_tc_count_action_write
};
static const struct atmel_tcb_config tcb_rm9200_config = {
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
+#include <linux/types.h>
struct stm32_lptim_cnt {
struct counter_device counter;
return regmap_update_bits(priv->regmap, STM32_LPTIM_CFGR, mask, val);
}
-/**
- * enum stm32_lptim_cnt_function - enumerates LPTimer counter & encoder modes
- * @STM32_LPTIM_COUNTER_INCREASE: up count on IN1 rising, falling or both edges
- * @STM32_LPTIM_ENCODER_BOTH_EDGE: count on both edges (IN1 & IN2 quadrature)
- *
+/*
* In non-quadrature mode, device counts up on active edge.
* In quadrature mode, encoder counting scenarios are as follows:
* +---------+----------+--------------------+--------------------+
* | edges | Low -> | Up | Down | Down | Up |
* +---------+----------+----------+---------+----------+---------+
*/
-enum stm32_lptim_cnt_function {
- STM32_LPTIM_COUNTER_INCREASE,
- STM32_LPTIM_ENCODER_BOTH_EDGE,
-};
-
static const enum counter_function stm32_lptim_cnt_functions[] = {
- [STM32_LPTIM_COUNTER_INCREASE] = COUNTER_FUNCTION_INCREASE,
- [STM32_LPTIM_ENCODER_BOTH_EDGE] = COUNTER_FUNCTION_QUADRATURE_X4,
-};
-
-enum stm32_lptim_synapse_action {
- STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE = STM32_LPTIM_CKPOL_RISING_EDGE,
- STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE = STM32_LPTIM_CKPOL_FALLING_EDGE,
- STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES = STM32_LPTIM_CKPOL_BOTH_EDGES,
- STM32_LPTIM_SYNAPSE_ACTION_NONE,
+ COUNTER_FUNCTION_INCREASE,
+ COUNTER_FUNCTION_QUADRATURE_X4,
};
static const enum counter_synapse_action stm32_lptim_cnt_synapse_actions[] = {
- /* Index must match with stm32_lptim_cnt_polarity[] (priv->polarity) */
- [STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- [STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE] = COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
- [STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
- [STM32_LPTIM_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
+ COUNTER_SYNAPSE_ACTION_NONE,
};
static int stm32_lptim_cnt_read(struct counter_device *counter,
- struct counter_count *count, unsigned long *val)
+ struct counter_count *count, u64 *val)
{
struct stm32_lptim_cnt *const priv = counter->priv;
u32 cnt;
return 0;
}
-static int stm32_lptim_cnt_function_get(struct counter_device *counter,
- struct counter_count *count,
- size_t *function)
+static int stm32_lptim_cnt_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
struct stm32_lptim_cnt *const priv = counter->priv;
if (!priv->quadrature_mode) {
- *function = STM32_LPTIM_COUNTER_INCREASE;
+ *function = COUNTER_FUNCTION_INCREASE;
return 0;
}
- if (priv->polarity == STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES) {
- *function = STM32_LPTIM_ENCODER_BOTH_EDGE;
+ if (priv->polarity == STM32_LPTIM_CKPOL_BOTH_EDGES) {
+ *function = COUNTER_FUNCTION_QUADRATURE_X4;
return 0;
}
return -EINVAL;
}
-static int stm32_lptim_cnt_function_set(struct counter_device *counter,
- struct counter_count *count,
- size_t function)
+static int stm32_lptim_cnt_function_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function function)
{
struct stm32_lptim_cnt *const priv = counter->priv;
return -EBUSY;
switch (function) {
- case STM32_LPTIM_COUNTER_INCREASE:
+ case COUNTER_FUNCTION_INCREASE:
priv->quadrature_mode = 0;
return 0;
- case STM32_LPTIM_ENCODER_BOTH_EDGE:
+ case COUNTER_FUNCTION_QUADRATURE_X4:
priv->quadrature_mode = 1;
- priv->polarity = STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES;
+ priv->polarity = STM32_LPTIM_CKPOL_BOTH_EDGES;
return 0;
default:
/* should never reach this path */
}
}
-static ssize_t stm32_lptim_cnt_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_lptim_cnt_enable_read(struct counter_device *counter,
+ struct counter_count *count,
+ u8 *enable)
{
struct stm32_lptim_cnt *const priv = counter->priv;
int ret;
if (ret < 0)
return ret;
- return scnprintf(buf, PAGE_SIZE, "%u\n", ret);
+ *enable = ret;
+
+ return 0;
}
-static ssize_t stm32_lptim_cnt_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_lptim_cnt_enable_write(struct counter_device *counter,
+ struct counter_count *count,
+ u8 enable)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- bool enable;
int ret;
- ret = kstrtobool(buf, &enable);
- if (ret)
- return ret;
-
/* Check nobody uses the timer, or already disabled/enabled */
ret = stm32_lptim_is_enabled(priv);
if ((ret < 0) || (!ret && !enable))
if (ret)
return ret;
- return len;
+ return 0;
}
-static ssize_t stm32_lptim_cnt_ceiling_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_lptim_cnt_ceiling_read(struct counter_device *counter,
+ struct counter_count *count,
+ u64 *ceiling)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- return snprintf(buf, PAGE_SIZE, "%u\n", priv->ceiling);
+ *ceiling = priv->ceiling;
+
+ return 0;
}
-static ssize_t stm32_lptim_cnt_ceiling_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_lptim_cnt_ceiling_write(struct counter_device *counter,
+ struct counter_count *count,
+ u64 ceiling)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- unsigned int ceiling;
- int ret;
if (stm32_lptim_is_enabled(priv))
return -EBUSY;
- ret = kstrtouint(buf, 0, &ceiling);
- if (ret)
- return ret;
-
if (ceiling > STM32_LPTIM_MAX_ARR)
return -ERANGE;
priv->ceiling = ceiling;
- return len;
+ return 0;
}
-static const struct counter_count_ext stm32_lptim_cnt_ext[] = {
- {
- .name = "enable",
- .read = stm32_lptim_cnt_enable_read,
- .write = stm32_lptim_cnt_enable_write
- },
- {
- .name = "ceiling",
- .read = stm32_lptim_cnt_ceiling_read,
- .write = stm32_lptim_cnt_ceiling_write
- },
+static struct counter_comp stm32_lptim_cnt_ext[] = {
+ COUNTER_COMP_ENABLE(stm32_lptim_cnt_enable_read,
+ stm32_lptim_cnt_enable_write),
+ COUNTER_COMP_CEILING(stm32_lptim_cnt_ceiling_read,
+ stm32_lptim_cnt_ceiling_write),
};
-static int stm32_lptim_cnt_action_get(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t *action)
+static int stm32_lptim_cnt_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- size_t function;
+ enum counter_function function;
int err;
- err = stm32_lptim_cnt_function_get(counter, count, &function);
+ err = stm32_lptim_cnt_function_read(counter, count, &function);
if (err)
return err;
switch (function) {
- case STM32_LPTIM_COUNTER_INCREASE:
+ case COUNTER_FUNCTION_INCREASE:
/* LP Timer acts as up-counter on input 1 */
- if (synapse->signal->id == count->synapses[0].signal->id)
- *action = priv->polarity;
- else
- *action = STM32_LPTIM_SYNAPSE_ACTION_NONE;
- return 0;
- case STM32_LPTIM_ENCODER_BOTH_EDGE:
- *action = priv->polarity;
+ if (synapse->signal->id != count->synapses[0].signal->id) {
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
+ return 0;
+ }
+
+ switch (priv->polarity) {
+ case STM32_LPTIM_CKPOL_RISING_EDGE:
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
+ return 0;
+ case STM32_LPTIM_CKPOL_FALLING_EDGE:
+ *action = COUNTER_SYNAPSE_ACTION_FALLING_EDGE;
+ return 0;
+ case STM32_LPTIM_CKPOL_BOTH_EDGES:
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
+ return 0;
+ default:
+ /* should never reach this path */
+ return -EINVAL;
+ }
+ case COUNTER_FUNCTION_QUADRATURE_X4:
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
return 0;
default:
/* should never reach this path */
}
}
-static int stm32_lptim_cnt_action_set(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t action)
+static int stm32_lptim_cnt_action_write(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action action)
{
struct stm32_lptim_cnt *const priv = counter->priv;
- size_t function;
+ enum counter_function function;
int err;
if (stm32_lptim_is_enabled(priv))
return -EBUSY;
- err = stm32_lptim_cnt_function_get(counter, count, &function);
+ err = stm32_lptim_cnt_function_read(counter, count, &function);
if (err)
return err;
/* only set polarity when in counter mode (on input 1) */
- if (function == STM32_LPTIM_COUNTER_INCREASE
- && synapse->signal->id == count->synapses[0].signal->id) {
- switch (action) {
- case STM32_LPTIM_SYNAPSE_ACTION_RISING_EDGE:
- case STM32_LPTIM_SYNAPSE_ACTION_FALLING_EDGE:
- case STM32_LPTIM_SYNAPSE_ACTION_BOTH_EDGES:
- priv->polarity = action;
- return 0;
- }
- }
+ if (function != COUNTER_FUNCTION_INCREASE
+ || synapse->signal->id != count->synapses[0].signal->id)
+ return -EINVAL;
- return -EINVAL;
+ switch (action) {
+ case COUNTER_SYNAPSE_ACTION_RISING_EDGE:
+ priv->polarity = STM32_LPTIM_CKPOL_RISING_EDGE;
+ return 0;
+ case COUNTER_SYNAPSE_ACTION_FALLING_EDGE:
+ priv->polarity = STM32_LPTIM_CKPOL_FALLING_EDGE;
+ return 0;
+ case COUNTER_SYNAPSE_ACTION_BOTH_EDGES:
+ priv->polarity = STM32_LPTIM_CKPOL_BOTH_EDGES;
+ return 0;
+ default:
+ return -EINVAL;
+ }
}
static const struct counter_ops stm32_lptim_cnt_ops = {
.count_read = stm32_lptim_cnt_read,
- .function_get = stm32_lptim_cnt_function_get,
- .function_set = stm32_lptim_cnt_function_set,
- .action_get = stm32_lptim_cnt_action_get,
- .action_set = stm32_lptim_cnt_action_set,
+ .function_read = stm32_lptim_cnt_function_read,
+ .function_write = stm32_lptim_cnt_function_write,
+ .action_read = stm32_lptim_cnt_action_read,
+ .action_write = stm32_lptim_cnt_action_write,
};
static struct counter_signal stm32_lptim_cnt_signals[] = {
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
+#include <linux/types.h>
#define TIM_CCMR_CCXS (BIT(8) | BIT(0))
#define TIM_CCMR_MASK (TIM_CCMR_CC1S | TIM_CCMR_CC2S | \
struct stm32_timer_regs bak;
};
-/**
- * enum stm32_count_function - enumerates stm32 timer counter encoder modes
- * @STM32_COUNT_SLAVE_MODE_DISABLED: counts on internal clock when CEN=1
- * @STM32_COUNT_ENCODER_MODE_1: counts TI1FP1 edges, depending on TI2FP2 level
- * @STM32_COUNT_ENCODER_MODE_2: counts TI2FP2 edges, depending on TI1FP1 level
- * @STM32_COUNT_ENCODER_MODE_3: counts on both TI1FP1 and TI2FP2 edges
- */
-enum stm32_count_function {
- STM32_COUNT_SLAVE_MODE_DISABLED,
- STM32_COUNT_ENCODER_MODE_1,
- STM32_COUNT_ENCODER_MODE_2,
- STM32_COUNT_ENCODER_MODE_3,
-};
-
static const enum counter_function stm32_count_functions[] = {
- [STM32_COUNT_SLAVE_MODE_DISABLED] = COUNTER_FUNCTION_INCREASE,
- [STM32_COUNT_ENCODER_MODE_1] = COUNTER_FUNCTION_QUADRATURE_X2_A,
- [STM32_COUNT_ENCODER_MODE_2] = COUNTER_FUNCTION_QUADRATURE_X2_B,
- [STM32_COUNT_ENCODER_MODE_3] = COUNTER_FUNCTION_QUADRATURE_X4,
+ COUNTER_FUNCTION_INCREASE,
+ COUNTER_FUNCTION_QUADRATURE_X2_A,
+ COUNTER_FUNCTION_QUADRATURE_X2_B,
+ COUNTER_FUNCTION_QUADRATURE_X4,
};
static int stm32_count_read(struct counter_device *counter,
- struct counter_count *count, unsigned long *val)
+ struct counter_count *count, u64 *val)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 cnt;
}
static int stm32_count_write(struct counter_device *counter,
- struct counter_count *count,
- const unsigned long val)
+ struct counter_count *count, const u64 val)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 ceiling;
return regmap_write(priv->regmap, TIM_CNT, val);
}
-static int stm32_count_function_get(struct counter_device *counter,
- struct counter_count *count,
- size_t *function)
+static int stm32_count_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 smcr;
switch (smcr & TIM_SMCR_SMS) {
case TIM_SMCR_SMS_SLAVE_MODE_DISABLED:
- *function = STM32_COUNT_SLAVE_MODE_DISABLED;
+ *function = COUNTER_FUNCTION_INCREASE;
return 0;
case TIM_SMCR_SMS_ENCODER_MODE_1:
- *function = STM32_COUNT_ENCODER_MODE_1;
+ *function = COUNTER_FUNCTION_QUADRATURE_X2_A;
return 0;
case TIM_SMCR_SMS_ENCODER_MODE_2:
- *function = STM32_COUNT_ENCODER_MODE_2;
+ *function = COUNTER_FUNCTION_QUADRATURE_X2_B;
return 0;
case TIM_SMCR_SMS_ENCODER_MODE_3:
- *function = STM32_COUNT_ENCODER_MODE_3;
+ *function = COUNTER_FUNCTION_QUADRATURE_X4;
return 0;
default:
return -EINVAL;
}
}
-static int stm32_count_function_set(struct counter_device *counter,
- struct counter_count *count,
- size_t function)
+static int stm32_count_function_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function function)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 cr1, sms;
switch (function) {
- case STM32_COUNT_SLAVE_MODE_DISABLED:
+ case COUNTER_FUNCTION_INCREASE:
sms = TIM_SMCR_SMS_SLAVE_MODE_DISABLED;
break;
- case STM32_COUNT_ENCODER_MODE_1:
+ case COUNTER_FUNCTION_QUADRATURE_X2_A:
sms = TIM_SMCR_SMS_ENCODER_MODE_1;
break;
- case STM32_COUNT_ENCODER_MODE_2:
+ case COUNTER_FUNCTION_QUADRATURE_X2_B:
sms = TIM_SMCR_SMS_ENCODER_MODE_2;
break;
- case STM32_COUNT_ENCODER_MODE_3:
+ case COUNTER_FUNCTION_QUADRATURE_X4:
sms = TIM_SMCR_SMS_ENCODER_MODE_3;
break;
default:
return 0;
}
-static ssize_t stm32_count_direction_read(struct counter_device *counter,
+static int stm32_count_direction_read(struct counter_device *counter,
struct counter_count *count,
- void *private, char *buf)
+ enum counter_count_direction *direction)
{
struct stm32_timer_cnt *const priv = counter->priv;
- const char *direction;
u32 cr1;
regmap_read(priv->regmap, TIM_CR1, &cr1);
- direction = (cr1 & TIM_CR1_DIR) ? "backward" : "forward";
+ *direction = (cr1 & TIM_CR1_DIR) ? COUNTER_COUNT_DIRECTION_BACKWARD :
+ COUNTER_COUNT_DIRECTION_FORWARD;
- return scnprintf(buf, PAGE_SIZE, "%s\n", direction);
+ return 0;
}
-static ssize_t stm32_count_ceiling_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_count_ceiling_read(struct counter_device *counter,
+ struct counter_count *count, u64 *ceiling)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 arr;
regmap_read(priv->regmap, TIM_ARR, &arr);
- return snprintf(buf, PAGE_SIZE, "%u\n", arr);
+ *ceiling = arr;
+
+ return 0;
}
-static ssize_t stm32_count_ceiling_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_count_ceiling_write(struct counter_device *counter,
+ struct counter_count *count, u64 ceiling)
{
struct stm32_timer_cnt *const priv = counter->priv;
- unsigned int ceiling;
- int ret;
-
- ret = kstrtouint(buf, 0, &ceiling);
- if (ret)
- return ret;
if (ceiling > priv->max_arr)
return -ERANGE;
regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0);
regmap_write(priv->regmap, TIM_ARR, ceiling);
- return len;
+ return 0;
}
-static ssize_t stm32_count_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *private, char *buf)
+static int stm32_count_enable_read(struct counter_device *counter,
+ struct counter_count *count, u8 *enable)
{
struct stm32_timer_cnt *const priv = counter->priv;
u32 cr1;
regmap_read(priv->regmap, TIM_CR1, &cr1);
- return scnprintf(buf, PAGE_SIZE, "%d\n", (bool)(cr1 & TIM_CR1_CEN));
+ *enable = cr1 & TIM_CR1_CEN;
+
+ return 0;
}
-static ssize_t stm32_count_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *private,
- const char *buf, size_t len)
+static int stm32_count_enable_write(struct counter_device *counter,
+ struct counter_count *count, u8 enable)
{
struct stm32_timer_cnt *const priv = counter->priv;
- int err;
u32 cr1;
- bool enable;
-
- err = kstrtobool(buf, &enable);
- if (err)
- return err;
if (enable) {
regmap_read(priv->regmap, TIM_CR1, &cr1);
/* Keep enabled state to properly handle low power states */
priv->enabled = enable;
- return len;
+ return 0;
}
-static const struct counter_count_ext stm32_count_ext[] = {
- {
- .name = "direction",
- .read = stm32_count_direction_read,
- },
- {
- .name = "enable",
- .read = stm32_count_enable_read,
- .write = stm32_count_enable_write
- },
- {
- .name = "ceiling",
- .read = stm32_count_ceiling_read,
- .write = stm32_count_ceiling_write
- },
-};
-
-enum stm32_synapse_action {
- STM32_SYNAPSE_ACTION_NONE,
- STM32_SYNAPSE_ACTION_BOTH_EDGES
+static struct counter_comp stm32_count_ext[] = {
+ COUNTER_COMP_DIRECTION(stm32_count_direction_read),
+ COUNTER_COMP_ENABLE(stm32_count_enable_read, stm32_count_enable_write),
+ COUNTER_COMP_CEILING(stm32_count_ceiling_read,
+ stm32_count_ceiling_write),
};
static const enum counter_synapse_action stm32_synapse_actions[] = {
- [STM32_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
- [STM32_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES
};
-static int stm32_action_get(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse,
- size_t *action)
+static int stm32_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
- size_t function;
+ enum counter_function function;
int err;
- err = stm32_count_function_get(counter, count, &function);
+ err = stm32_count_function_read(counter, count, &function);
if (err)
return err;
switch (function) {
- case STM32_COUNT_SLAVE_MODE_DISABLED:
+ case COUNTER_FUNCTION_INCREASE:
/* counts on internal clock when CEN=1 */
- *action = STM32_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
return 0;
- case STM32_COUNT_ENCODER_MODE_1:
+ case COUNTER_FUNCTION_QUADRATURE_X2_A:
/* counts up/down on TI1FP1 edge depending on TI2FP2 level */
if (synapse->signal->id == count->synapses[0].signal->id)
- *action = STM32_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
else
- *action = STM32_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
return 0;
- case STM32_COUNT_ENCODER_MODE_2:
+ case COUNTER_FUNCTION_QUADRATURE_X2_B:
/* counts up/down on TI2FP2 edge depending on TI1FP1 level */
if (synapse->signal->id == count->synapses[1].signal->id)
- *action = STM32_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
else
- *action = STM32_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
return 0;
- case STM32_COUNT_ENCODER_MODE_3:
+ case COUNTER_FUNCTION_QUADRATURE_X4:
/* counts up/down on both TI1FP1 and TI2FP2 edges */
- *action = STM32_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
return 0;
default:
return -EINVAL;
static const struct counter_ops stm32_timer_cnt_ops = {
.count_read = stm32_count_read,
.count_write = stm32_count_write,
- .function_get = stm32_count_function_get,
- .function_set = stm32_count_function_set,
- .action_get = stm32_action_get,
+ .function_read = stm32_count_function_read,
+ .function_write = stm32_count_function_write,
+ .action_read = stm32_action_read,
};
static struct counter_signal stm32_signals[] = {
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
+#include <linux/types.h>
/* 32-bit registers */
#define QPOSCNT 0x0
};
/* Position Counter Input Modes */
-enum {
+enum ti_eqep_count_func {
TI_EQEP_COUNT_FUNC_QUAD_COUNT,
TI_EQEP_COUNT_FUNC_DIR_COUNT,
TI_EQEP_COUNT_FUNC_UP_COUNT,
TI_EQEP_COUNT_FUNC_DOWN_COUNT,
};
-enum {
- TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES,
- TI_EQEP_SYNAPSE_ACTION_RISING_EDGE,
- TI_EQEP_SYNAPSE_ACTION_NONE,
-};
-
struct ti_eqep_cnt {
struct counter_device counter;
struct regmap *regmap32;
};
static int ti_eqep_count_read(struct counter_device *counter,
- struct counter_count *count, unsigned long *val)
+ struct counter_count *count, u64 *val)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 cnt;
}
static int ti_eqep_count_write(struct counter_device *counter,
- struct counter_count *count, unsigned long val)
+ struct counter_count *count, u64 val)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 max;
return regmap_write(priv->regmap32, QPOSCNT, val);
}
-static int ti_eqep_function_get(struct counter_device *counter,
- struct counter_count *count, size_t *function)
+static int ti_eqep_function_read(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qdecctl;
regmap_read(priv->regmap16, QDECCTL, &qdecctl);
- *function = (qdecctl & QDECCTL_QSRC) >> QDECCTL_QSRC_SHIFT;
+
+ switch ((qdecctl & QDECCTL_QSRC) >> QDECCTL_QSRC_SHIFT) {
+ case TI_EQEP_COUNT_FUNC_QUAD_COUNT:
+ *function = COUNTER_FUNCTION_QUADRATURE_X4;
+ break;
+ case TI_EQEP_COUNT_FUNC_DIR_COUNT:
+ *function = COUNTER_FUNCTION_PULSE_DIRECTION;
+ break;
+ case TI_EQEP_COUNT_FUNC_UP_COUNT:
+ *function = COUNTER_FUNCTION_INCREASE;
+ break;
+ case TI_EQEP_COUNT_FUNC_DOWN_COUNT:
+ *function = COUNTER_FUNCTION_DECREASE;
+ break;
+ }
return 0;
}
-static int ti_eqep_function_set(struct counter_device *counter,
- struct counter_count *count, size_t function)
+static int ti_eqep_function_write(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function function)
{
struct ti_eqep_cnt *priv = counter->priv;
+ enum ti_eqep_count_func qsrc;
+
+ switch (function) {
+ case COUNTER_FUNCTION_QUADRATURE_X4:
+ qsrc = TI_EQEP_COUNT_FUNC_QUAD_COUNT;
+ break;
+ case COUNTER_FUNCTION_PULSE_DIRECTION:
+ qsrc = TI_EQEP_COUNT_FUNC_DIR_COUNT;
+ break;
+ case COUNTER_FUNCTION_INCREASE:
+ qsrc = TI_EQEP_COUNT_FUNC_UP_COUNT;
+ break;
+ case COUNTER_FUNCTION_DECREASE:
+ qsrc = TI_EQEP_COUNT_FUNC_DOWN_COUNT;
+ break;
+ default:
+ /* should never reach this path */
+ return -EINVAL;
+ }
return regmap_write_bits(priv->regmap16, QDECCTL, QDECCTL_QSRC,
- function << QDECCTL_QSRC_SHIFT);
+ qsrc << QDECCTL_QSRC_SHIFT);
}
-static int ti_eqep_action_get(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse, size_t *action)
+static int ti_eqep_action_read(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action)
{
struct ti_eqep_cnt *priv = counter->priv;
- size_t function;
+ enum counter_function function;
u32 qdecctl;
int err;
- err = ti_eqep_function_get(counter, count, &function);
+ err = ti_eqep_function_read(counter, count, &function);
if (err)
return err;
switch (function) {
- case TI_EQEP_COUNT_FUNC_QUAD_COUNT:
+ case COUNTER_FUNCTION_QUADRATURE_X4:
/* In quadrature mode, the rising and falling edge of both
* QEPA and QEPB trigger QCLK.
*/
- *action = TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
return 0;
- case TI_EQEP_COUNT_FUNC_DIR_COUNT:
+ case COUNTER_FUNCTION_PULSE_DIRECTION:
/* In direction-count mode only rising edge of QEPA is counted
* and QEPB gives direction.
*/
switch (synapse->signal->id) {
case TI_EQEP_SIGNAL_QEPA:
- *action = TI_EQEP_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
return 0;
case TI_EQEP_SIGNAL_QEPB:
- *action = TI_EQEP_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
return 0;
default:
/* should never reach this path */
return -EINVAL;
}
- case TI_EQEP_COUNT_FUNC_UP_COUNT:
- case TI_EQEP_COUNT_FUNC_DOWN_COUNT:
+ case COUNTER_FUNCTION_INCREASE:
+ case COUNTER_FUNCTION_DECREASE:
/* In up/down-count modes only QEPA is counted and QEPB is not
* used.
*/
return err;
if (qdecctl & QDECCTL_XCR)
- *action = TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES;
+ *action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
else
- *action = TI_EQEP_SYNAPSE_ACTION_RISING_EDGE;
+ *action = COUNTER_SYNAPSE_ACTION_RISING_EDGE;
return 0;
case TI_EQEP_SIGNAL_QEPB:
- *action = TI_EQEP_SYNAPSE_ACTION_NONE;
+ *action = COUNTER_SYNAPSE_ACTION_NONE;
return 0;
default:
/* should never reach this path */
static const struct counter_ops ti_eqep_counter_ops = {
.count_read = ti_eqep_count_read,
.count_write = ti_eqep_count_write,
- .function_get = ti_eqep_function_get,
- .function_set = ti_eqep_function_set,
- .action_get = ti_eqep_action_get,
+ .function_read = ti_eqep_function_read,
+ .function_write = ti_eqep_function_write,
+ .action_read = ti_eqep_action_read,
};
-static ssize_t ti_eqep_position_ceiling_read(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, char *buf)
+static int ti_eqep_position_ceiling_read(struct counter_device *counter,
+ struct counter_count *count,
+ u64 *ceiling)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qposmax;
regmap_read(priv->regmap32, QPOSMAX, &qposmax);
- return sprintf(buf, "%u\n", qposmax);
+ *ceiling = qposmax;
+
+ return 0;
}
-static ssize_t ti_eqep_position_ceiling_write(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, const char *buf,
- size_t len)
+static int ti_eqep_position_ceiling_write(struct counter_device *counter,
+ struct counter_count *count,
+ u64 ceiling)
{
struct ti_eqep_cnt *priv = counter->priv;
- int err;
- u32 res;
- err = kstrtouint(buf, 0, &res);
- if (err < 0)
- return err;
+ if (ceiling != (u32)ceiling)
+ return -ERANGE;
- regmap_write(priv->regmap32, QPOSMAX, res);
+ regmap_write(priv->regmap32, QPOSMAX, ceiling);
- return len;
+ return 0;
}
-static ssize_t ti_eqep_position_enable_read(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, char *buf)
+static int ti_eqep_position_enable_read(struct counter_device *counter,
+ struct counter_count *count, u8 *enable)
{
struct ti_eqep_cnt *priv = counter->priv;
u32 qepctl;
regmap_read(priv->regmap16, QEPCTL, &qepctl);
- return sprintf(buf, "%u\n", !!(qepctl & QEPCTL_PHEN));
+ *enable = !!(qepctl & QEPCTL_PHEN);
+
+ return 0;
}
-static ssize_t ti_eqep_position_enable_write(struct counter_device *counter,
- struct counter_count *count,
- void *ext_priv, const char *buf,
- size_t len)
+static int ti_eqep_position_enable_write(struct counter_device *counter,
+ struct counter_count *count, u8 enable)
{
struct ti_eqep_cnt *priv = counter->priv;
- int err;
- bool res;
-
- err = kstrtobool(buf, &res);
- if (err < 0)
- return err;
- regmap_write_bits(priv->regmap16, QEPCTL, QEPCTL_PHEN, res ? -1 : 0);
+ regmap_write_bits(priv->regmap16, QEPCTL, QEPCTL_PHEN, enable ? -1 : 0);
- return len;
+ return 0;
}
-static struct counter_count_ext ti_eqep_position_ext[] = {
- {
- .name = "ceiling",
- .read = ti_eqep_position_ceiling_read,
- .write = ti_eqep_position_ceiling_write,
- },
- {
- .name = "enable",
- .read = ti_eqep_position_enable_read,
- .write = ti_eqep_position_enable_write,
- },
+static struct counter_comp ti_eqep_position_ext[] = {
+ COUNTER_COMP_CEILING(ti_eqep_position_ceiling_read,
+ ti_eqep_position_ceiling_write),
+ COUNTER_COMP_ENABLE(ti_eqep_position_enable_read,
+ ti_eqep_position_enable_write),
};
static struct counter_signal ti_eqep_signals[] = {
};
static const enum counter_function ti_eqep_position_functions[] = {
- [TI_EQEP_COUNT_FUNC_QUAD_COUNT] = COUNTER_FUNCTION_QUADRATURE_X4,
- [TI_EQEP_COUNT_FUNC_DIR_COUNT] = COUNTER_FUNCTION_PULSE_DIRECTION,
- [TI_EQEP_COUNT_FUNC_UP_COUNT] = COUNTER_FUNCTION_INCREASE,
- [TI_EQEP_COUNT_FUNC_DOWN_COUNT] = COUNTER_FUNCTION_DECREASE,
+ COUNTER_FUNCTION_QUADRATURE_X4,
+ COUNTER_FUNCTION_PULSE_DIRECTION,
+ COUNTER_FUNCTION_INCREASE,
+ COUNTER_FUNCTION_DECREASE,
};
static const enum counter_synapse_action ti_eqep_position_synapse_actions[] = {
- [TI_EQEP_SYNAPSE_ACTION_BOTH_EDGES] = COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
- [TI_EQEP_SYNAPSE_ACTION_RISING_EDGE] = COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- [TI_EQEP_SYNAPSE_ACTION_NONE] = COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_NONE,
};
static struct counter_synapse ti_eqep_position_synapses[] = {
#ifndef _COUNTER_H_
#define _COUNTER_H_
-#include <linux/counter_enum.h>
#include <linux/device.h>
+#include <linux/kernel.h>
#include <linux/types.h>
+struct counter_device;
+struct counter_count;
+struct counter_synapse;
+struct counter_signal;
+
+enum counter_comp_type {
+ COUNTER_COMP_U8,
+ COUNTER_COMP_U64,
+ COUNTER_COMP_BOOL,
+ COUNTER_COMP_SIGNAL_LEVEL,
+ COUNTER_COMP_FUNCTION,
+ COUNTER_COMP_SYNAPSE_ACTION,
+ COUNTER_COMP_ENUM,
+ COUNTER_COMP_COUNT_DIRECTION,
+ COUNTER_COMP_COUNT_MODE,
+};
+
+enum counter_scope {
+ COUNTER_SCOPE_DEVICE,
+ COUNTER_SCOPE_SIGNAL,
+ COUNTER_SCOPE_COUNT,
+};
+
enum counter_count_direction {
- COUNTER_COUNT_DIRECTION_FORWARD = 0,
- COUNTER_COUNT_DIRECTION_BACKWARD
+ COUNTER_COUNT_DIRECTION_FORWARD,
+ COUNTER_COUNT_DIRECTION_BACKWARD,
};
-extern const char *const counter_count_direction_str[2];
enum counter_count_mode {
- COUNTER_COUNT_MODE_NORMAL = 0,
+ COUNTER_COUNT_MODE_NORMAL,
COUNTER_COUNT_MODE_RANGE_LIMIT,
COUNTER_COUNT_MODE_NON_RECYCLE,
- COUNTER_COUNT_MODE_MODULO_N
+ COUNTER_COUNT_MODE_MODULO_N,
};
-extern const char *const counter_count_mode_str[4];
-struct counter_device;
-struct counter_signal;
+enum counter_function {
+ COUNTER_FUNCTION_INCREASE,
+ COUNTER_FUNCTION_DECREASE,
+ COUNTER_FUNCTION_PULSE_DIRECTION,
+ COUNTER_FUNCTION_QUADRATURE_X1_A,
+ COUNTER_FUNCTION_QUADRATURE_X1_B,
+ COUNTER_FUNCTION_QUADRATURE_X2_A,
+ COUNTER_FUNCTION_QUADRATURE_X2_B,
+ COUNTER_FUNCTION_QUADRATURE_X4,
+};
+
+enum counter_signal_level {
+ COUNTER_SIGNAL_LEVEL_LOW,
+ COUNTER_SIGNAL_LEVEL_HIGH,
+};
+
+enum counter_synapse_action {
+ COUNTER_SYNAPSE_ACTION_NONE,
+ COUNTER_SYNAPSE_ACTION_RISING_EDGE,
+ COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
+ COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
+};
/**
- * struct counter_signal_ext - Counter Signal extensions
- * @name: attribute name
- * @read: read callback for this attribute; may be NULL
- * @write: write callback for this attribute; may be NULL
- * @priv: data private to the driver
+ * struct counter_comp - Counter component node
+ * @type: Counter component data type
+ * @name: device-specific component name
+ * @priv: component-relevant data
+ * @action_read Synapse action mode read callback. The read value of the
+ * respective Synapse action mode should be passed back via
+ * the action parameter.
+ * @device_u8_read Device u8 component read callback. The read value of the
+ * respective Device u8 component should be passed back via
+ * the val parameter.
+ * @count_u8_read Count u8 component read callback. The read value of the
+ * respective Count u8 component should be passed back via
+ * the val parameter.
+ * @signal_u8_read Signal u8 component read callback. The read value of the
+ * respective Signal u8 component should be passed back via
+ * the val parameter.
+ * @device_u32_read Device u32 component read callback. The read value of
+ * the respective Device u32 component should be passed
+ * back via the val parameter.
+ * @count_u32_read Count u32 component read callback. The read value of the
+ * respective Count u32 component should be passed back via
+ * the val parameter.
+ * @signal_u32_read Signal u32 component read callback. The read value of
+ * the respective Signal u32 component should be passed
+ * back via the val parameter.
+ * @device_u64_read Device u64 component read callback. The read value of
+ * the respective Device u64 component should be passed
+ * back via the val parameter.
+ * @count_u64_read Count u64 component read callback. The read value of the
+ * respective Count u64 component should be passed back via
+ * the val parameter.
+ * @signal_u64_read Signal u64 component read callback. The read value of
+ * the respective Signal u64 component should be passed
+ * back via the val parameter.
+ * @action_write Synapse action mode write callback. The write value of
+ * the respective Synapse action mode is passed via the
+ * action parameter.
+ * @device_u8_write Device u8 component write callback. The write value of
+ * the respective Device u8 component is passed via the val
+ * parameter.
+ * @count_u8_write Count u8 component write callback. The write value of
+ * the respective Count u8 component is passed via the val
+ * parameter.
+ * @signal_u8_write Signal u8 component write callback. The write value of
+ * the respective Signal u8 component is passed via the val
+ * parameter.
+ * @device_u32_write Device u32 component write callback. The write value of
+ * the respective Device u32 component is passed via the
+ * val parameter.
+ * @count_u32_write Count u32 component write callback. The write value of
+ * the respective Count u32 component is passed via the val
+ * parameter.
+ * @signal_u32_write Signal u32 component write callback. The write value of
+ * the respective Signal u32 component is passed via the
+ * val parameter.
+ * @device_u64_write Device u64 component write callback. The write value of
+ * the respective Device u64 component is passed via the
+ * val parameter.
+ * @count_u64_write Count u64 component write callback. The write value of
+ * the respective Count u64 component is passed via the val
+ * parameter.
+ * @signal_u64_write Signal u64 component write callback. The write value of
+ * the respective Signal u64 component is passed via the
+ * val parameter.
*/
-struct counter_signal_ext {
+struct counter_comp {
+ enum counter_comp_type type;
const char *name;
- ssize_t (*read)(struct counter_device *counter,
- struct counter_signal *signal, void *priv, char *buf);
- ssize_t (*write)(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- const char *buf, size_t len);
void *priv;
+ union {
+ int (*action_read)(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action);
+ int (*device_u8_read)(struct counter_device *counter, u8 *val);
+ int (*count_u8_read)(struct counter_device *counter,
+ struct counter_count *count, u8 *val);
+ int (*signal_u8_read)(struct counter_device *counter,
+ struct counter_signal *signal, u8 *val);
+ int (*device_u32_read)(struct counter_device *counter,
+ u32 *val);
+ int (*count_u32_read)(struct counter_device *counter,
+ struct counter_count *count, u32 *val);
+ int (*signal_u32_read)(struct counter_device *counter,
+ struct counter_signal *signal, u32 *val);
+ int (*device_u64_read)(struct counter_device *counter,
+ u64 *val);
+ int (*count_u64_read)(struct counter_device *counter,
+ struct counter_count *count, u64 *val);
+ int (*signal_u64_read)(struct counter_device *counter,
+ struct counter_signal *signal, u64 *val);
+ };
+ union {
+ int (*action_write)(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action action);
+ int (*device_u8_write)(struct counter_device *counter, u8 val);
+ int (*count_u8_write)(struct counter_device *counter,
+ struct counter_count *count, u8 val);
+ int (*signal_u8_write)(struct counter_device *counter,
+ struct counter_signal *signal, u8 val);
+ int (*device_u32_write)(struct counter_device *counter,
+ u32 val);
+ int (*count_u32_write)(struct counter_device *counter,
+ struct counter_count *count, u32 val);
+ int (*signal_u32_write)(struct counter_device *counter,
+ struct counter_signal *signal, u32 val);
+ int (*device_u64_write)(struct counter_device *counter,
+ u64 val);
+ int (*count_u64_write)(struct counter_device *counter,
+ struct counter_count *count, u64 val);
+ int (*signal_u64_write)(struct counter_device *counter,
+ struct counter_signal *signal, u64 val);
+ };
};
/**
* as it appears in the datasheet documentation
* @ext: optional array of Counter Signal extensions
* @num_ext: number of Counter Signal extensions specified in @ext
- * @priv: optional private data supplied by driver
*/
struct counter_signal {
int id;
const char *name;
- const struct counter_signal_ext *ext;
+ struct counter_comp *ext;
size_t num_ext;
-
- void *priv;
-};
-
-/**
- * struct counter_signal_enum_ext - Signal enum extension attribute
- * @items: Array of strings
- * @num_items: Number of items specified in @items
- * @set: Set callback function; may be NULL
- * @get: Get callback function; may be NULL
- *
- * The counter_signal_enum_ext structure can be used to implement enum style
- * Signal extension attributes. Enum style attributes are those which have a set
- * of strings that map to unsigned integer values. The Generic Counter Signal
- * enum extension helper code takes care of mapping between value and string, as
- * well as generating a "_available" file which contains a list of all available
- * items. The get callback is used to query the currently active item; the index
- * of the item within the respective items array is returned via the 'item'
- * parameter. The set callback is called when the attribute is updated; the
- * 'item' parameter contains the index of the newly activated item within the
- * respective items array.
- */
-struct counter_signal_enum_ext {
- const char * const *items;
- size_t num_items;
- int (*get)(struct counter_device *counter,
- struct counter_signal *signal, size_t *item);
- int (*set)(struct counter_device *counter,
- struct counter_signal *signal, size_t item);
-};
-
-/**
- * COUNTER_SIGNAL_ENUM() - Initialize Signal enum extension
- * @_name: Attribute name
- * @_e: Pointer to a counter_signal_enum_ext structure
- *
- * This should usually be used together with COUNTER_SIGNAL_ENUM_AVAILABLE()
- */
-#define COUNTER_SIGNAL_ENUM(_name, _e) \
-{ \
- .name = (_name), \
- .read = counter_signal_enum_read, \
- .write = counter_signal_enum_write, \
- .priv = (_e) \
-}
-
-/**
- * COUNTER_SIGNAL_ENUM_AVAILABLE() - Initialize Signal enum available extension
- * @_name: Attribute name ("_available" will be appended to the name)
- * @_e: Pointer to a counter_signal_enum_ext structure
- *
- * Creates a read only attribute that lists all the available enum items in a
- * newline separated list. This should usually be used together with
- * COUNTER_SIGNAL_ENUM()
- */
-#define COUNTER_SIGNAL_ENUM_AVAILABLE(_name, _e) \
-{ \
- .name = (_name "_available"), \
- .read = counter_signal_enum_available_read, \
- .priv = (_e) \
-}
-
-enum counter_synapse_action {
- COUNTER_SYNAPSE_ACTION_NONE = 0,
- COUNTER_SYNAPSE_ACTION_RISING_EDGE,
- COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
- COUNTER_SYNAPSE_ACTION_BOTH_EDGES
};
/**
* struct counter_synapse - Counter Synapse node
- * @action: index of current action mode
* @actions_list: array of available action modes
* @num_actions: number of action modes specified in @actions_list
* @signal: pointer to associated signal
*/
struct counter_synapse {
- size_t action;
const enum counter_synapse_action *actions_list;
size_t num_actions;
struct counter_signal *signal;
};
-struct counter_count;
-
-/**
- * struct counter_count_ext - Counter Count extension
- * @name: attribute name
- * @read: read callback for this attribute; may be NULL
- * @write: write callback for this attribute; may be NULL
- * @priv: data private to the driver
- */
-struct counter_count_ext {
- const char *name;
- ssize_t (*read)(struct counter_device *counter,
- struct counter_count *count, void *priv, char *buf);
- ssize_t (*write)(struct counter_device *counter,
- struct counter_count *count, void *priv,
- const char *buf, size_t len);
- void *priv;
-};
-
-enum counter_function {
- COUNTER_FUNCTION_INCREASE = 0,
- COUNTER_FUNCTION_DECREASE,
- COUNTER_FUNCTION_PULSE_DIRECTION,
- COUNTER_FUNCTION_QUADRATURE_X1_A,
- COUNTER_FUNCTION_QUADRATURE_X1_B,
- COUNTER_FUNCTION_QUADRATURE_X2_A,
- COUNTER_FUNCTION_QUADRATURE_X2_B,
- COUNTER_FUNCTION_QUADRATURE_X4
-};
-
/**
* struct counter_count - Counter Count node
* @id: unique ID used to identify Count
* @name: device-specific Count name; ideally, this should match
* the name as it appears in the datasheet documentation
- * @function: index of current function mode
* @functions_list: array available function modes
* @num_functions: number of function modes specified in @functions_list
* @synapses: array of synapses for initialization
* @num_synapses: number of synapses specified in @synapses
* @ext: optional array of Counter Count extensions
* @num_ext: number of Counter Count extensions specified in @ext
- * @priv: optional private data supplied by driver
*/
struct counter_count {
int id;
const char *name;
- size_t function;
const enum counter_function *functions_list;
size_t num_functions;
struct counter_synapse *synapses;
size_t num_synapses;
- const struct counter_count_ext *ext;
+ struct counter_comp *ext;
size_t num_ext;
-
- void *priv;
-};
-
-/**
- * struct counter_count_enum_ext - Count enum extension attribute
- * @items: Array of strings
- * @num_items: Number of items specified in @items
- * @set: Set callback function; may be NULL
- * @get: Get callback function; may be NULL
- *
- * The counter_count_enum_ext structure can be used to implement enum style
- * Count extension attributes. Enum style attributes are those which have a set
- * of strings that map to unsigned integer values. The Generic Counter Count
- * enum extension helper code takes care of mapping between value and string, as
- * well as generating a "_available" file which contains a list of all available
- * items. The get callback is used to query the currently active item; the index
- * of the item within the respective items array is returned via the 'item'
- * parameter. The set callback is called when the attribute is updated; the
- * 'item' parameter contains the index of the newly activated item within the
- * respective items array.
- */
-struct counter_count_enum_ext {
- const char * const *items;
- size_t num_items;
- int (*get)(struct counter_device *counter, struct counter_count *count,
- size_t *item);
- int (*set)(struct counter_device *counter, struct counter_count *count,
- size_t item);
-};
-
-/**
- * COUNTER_COUNT_ENUM() - Initialize Count enum extension
- * @_name: Attribute name
- * @_e: Pointer to a counter_count_enum_ext structure
- *
- * This should usually be used together with COUNTER_COUNT_ENUM_AVAILABLE()
- */
-#define COUNTER_COUNT_ENUM(_name, _e) \
-{ \
- .name = (_name), \
- .read = counter_count_enum_read, \
- .write = counter_count_enum_write, \
- .priv = (_e) \
-}
-
-/**
- * COUNTER_COUNT_ENUM_AVAILABLE() - Initialize Count enum available extension
- * @_name: Attribute name ("_available" will be appended to the name)
- * @_e: Pointer to a counter_count_enum_ext structure
- *
- * Creates a read only attribute that lists all the available enum items in a
- * newline separated list. This should usually be used together with
- * COUNTER_COUNT_ENUM()
- */
-#define COUNTER_COUNT_ENUM_AVAILABLE(_name, _e) \
-{ \
- .name = (_name "_available"), \
- .read = counter_count_enum_available_read, \
- .priv = (_e) \
-}
-
-/**
- * struct counter_device_attr_group - internal container for attribute group
- * @attr_group: Counter sysfs attributes group
- * @attr_list: list to keep track of created Counter sysfs attributes
- * @num_attr: number of Counter sysfs attributes
- */
-struct counter_device_attr_group {
- struct attribute_group attr_group;
- struct list_head attr_list;
- size_t num_attr;
-};
-
-/**
- * struct counter_device_state - internal state container for a Counter device
- * @id: unique ID used to identify the Counter
- * @dev: internal device structure
- * @groups_list: attribute groups list (for Signals, Counts, and ext)
- * @num_groups: number of attribute groups containers
- * @groups: Counter sysfs attribute groups (to populate @dev.groups)
- */
-struct counter_device_state {
- int id;
- struct device dev;
- struct counter_device_attr_group *groups_list;
- size_t num_groups;
- const struct attribute_group **groups;
-};
-
-enum counter_signal_level {
- COUNTER_SIGNAL_LEVEL_LOW,
- COUNTER_SIGNAL_LEVEL_HIGH,
};
/**
* @count_write: optional write callback for Count attribute. The write
* value for the respective Count is passed in via the val
* parameter.
- * @function_get: function to get the current count function mode. Returns
- * 0 on success and negative error code on error. The index
- * of the respective Count's returned function mode should
- * be passed back via the function parameter.
- * @function_set: function to set the count function mode. function is the
- * index of the requested function mode from the respective
- * Count's functions_list array.
- * @action_get: function to get the current action mode. Returns 0 on
- * success and negative error code on error. The index of
- * the respective Synapse's returned action mode should be
- * passed back via the action parameter.
- * @action_set: function to set the action mode. action is the index of
- * the requested action mode from the respective Synapse's
- * actions_list array.
+ * @function_read: read callback the Count function modes. The read
+ * function mode of the respective Count should be passed
+ * back via the function parameter.
+ * @function_write: write callback for Count function modes. The function
+ * mode to write for the respective Count is passed in via
+ * the function parameter.
+ * @action_read: read callback the Synapse action modes. The read action
+ * mode of the respective Synapse should be passed back via
+ * the action parameter.
+ * @action_write: write callback for Synapse action modes. The action mode
+ * to write for the respective Synapse is passed in via the
+ * action parameter.
*/
struct counter_ops {
int (*signal_read)(struct counter_device *counter,
struct counter_signal *signal,
enum counter_signal_level *level);
int (*count_read)(struct counter_device *counter,
- struct counter_count *count, unsigned long *val);
+ struct counter_count *count, u64 *value);
int (*count_write)(struct counter_device *counter,
- struct counter_count *count, unsigned long val);
- int (*function_get)(struct counter_device *counter,
- struct counter_count *count, size_t *function);
- int (*function_set)(struct counter_device *counter,
- struct counter_count *count, size_t function);
- int (*action_get)(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse, size_t *action);
- int (*action_set)(struct counter_device *counter,
- struct counter_count *count,
- struct counter_synapse *synapse, size_t action);
-};
-
-/**
- * struct counter_device_ext - Counter device extension
- * @name: attribute name
- * @read: read callback for this attribute; may be NULL
- * @write: write callback for this attribute; may be NULL
- * @priv: data private to the driver
- */
-struct counter_device_ext {
- const char *name;
- ssize_t (*read)(struct counter_device *counter, void *priv, char *buf);
- ssize_t (*write)(struct counter_device *counter, void *priv,
- const char *buf, size_t len);
- void *priv;
+ struct counter_count *count, u64 value);
+ int (*function_read)(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function *function);
+ int (*function_write)(struct counter_device *counter,
+ struct counter_count *count,
+ enum counter_function function);
+ int (*action_read)(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action *action);
+ int (*action_write)(struct counter_device *counter,
+ struct counter_count *count,
+ struct counter_synapse *synapse,
+ enum counter_synapse_action action);
};
-/**
- * struct counter_device_enum_ext - Counter enum extension attribute
- * @items: Array of strings
- * @num_items: Number of items specified in @items
- * @set: Set callback function; may be NULL
- * @get: Get callback function; may be NULL
- *
- * The counter_device_enum_ext structure can be used to implement enum style
- * Counter extension attributes. Enum style attributes are those which have a
- * set of strings that map to unsigned integer values. The Generic Counter enum
- * extension helper code takes care of mapping between value and string, as well
- * as generating a "_available" file which contains a list of all available
- * items. The get callback is used to query the currently active item; the index
- * of the item within the respective items array is returned via the 'item'
- * parameter. The set callback is called when the attribute is updated; the
- * 'item' parameter contains the index of the newly activated item within the
- * respective items array.
- */
-struct counter_device_enum_ext {
- const char * const *items;
- size_t num_items;
- int (*get)(struct counter_device *counter, size_t *item);
- int (*set)(struct counter_device *counter, size_t item);
-};
-
-/**
- * COUNTER_DEVICE_ENUM() - Initialize Counter enum extension
- * @_name: Attribute name
- * @_e: Pointer to a counter_device_enum_ext structure
- *
- * This should usually be used together with COUNTER_DEVICE_ENUM_AVAILABLE()
- */
-#define COUNTER_DEVICE_ENUM(_name, _e) \
-{ \
- .name = (_name), \
- .read = counter_device_enum_read, \
- .write = counter_device_enum_write, \
- .priv = (_e) \
-}
-
-/**
- * COUNTER_DEVICE_ENUM_AVAILABLE() - Initialize Counter enum available extension
- * @_name: Attribute name ("_available" will be appended to the name)
- * @_e: Pointer to a counter_device_enum_ext structure
- *
- * Creates a read only attribute that lists all the available enum items in a
- * newline separated list. This should usually be used together with
- * COUNTER_DEVICE_ENUM()
- */
-#define COUNTER_DEVICE_ENUM_AVAILABLE(_name, _e) \
-{ \
- .name = (_name "_available"), \
- .read = counter_device_enum_available_read, \
- .priv = (_e) \
-}
-
/**
* struct counter_device - Counter data structure
* @name: name of the device as it appears in the datasheet
* @parent: optional parent device providing the counters
- * @device_state: internal device state container
* @ops: callbacks from driver
* @signals: array of Signals
* @num_signals: number of Signals specified in @signals
* @ext: optional array of Counter device extensions
* @num_ext: number of Counter device extensions specified in @ext
* @priv: optional private data supplied by driver
+ * @dev: internal device structure
*/
struct counter_device {
const char *name;
struct device *parent;
- struct counter_device_state *device_state;
const struct counter_ops *ops;
struct counter_count *counts;
size_t num_counts;
- const struct counter_device_ext *ext;
+ struct counter_comp *ext;
size_t num_ext;
void *priv;
+
+ struct device dev;
};
int counter_register(struct counter_device *const counter);
void counter_unregister(struct counter_device *const counter);
int devm_counter_register(struct device *dev,
struct counter_device *const counter);
-void devm_counter_unregister(struct device *dev,
- struct counter_device *const counter);
+
+#define COUNTER_COMP_DEVICE_U8(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_U8, \
+ .name = (_name), \
+ .device_u8_read = (_read), \
+ .device_u8_write = (_write), \
+}
+#define COUNTER_COMP_COUNT_U8(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_U8, \
+ .name = (_name), \
+ .count_u8_read = (_read), \
+ .count_u8_write = (_write), \
+}
+#define COUNTER_COMP_SIGNAL_U8(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_U8, \
+ .name = (_name), \
+ .signal_u8_read = (_read), \
+ .signal_u8_write = (_write), \
+}
+
+#define COUNTER_COMP_DEVICE_U64(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_U64, \
+ .name = (_name), \
+ .device_u64_read = (_read), \
+ .device_u64_write = (_write), \
+}
+#define COUNTER_COMP_COUNT_U64(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_U64, \
+ .name = (_name), \
+ .count_u64_read = (_read), \
+ .count_u64_write = (_write), \
+}
+#define COUNTER_COMP_SIGNAL_U64(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_U64, \
+ .name = (_name), \
+ .signal_u64_read = (_read), \
+ .signal_u64_write = (_write), \
+}
+
+#define COUNTER_COMP_DEVICE_BOOL(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_BOOL, \
+ .name = (_name), \
+ .device_u8_read = (_read), \
+ .device_u8_write = (_write), \
+}
+#define COUNTER_COMP_COUNT_BOOL(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_BOOL, \
+ .name = (_name), \
+ .count_u8_read = (_read), \
+ .count_u8_write = (_write), \
+}
+#define COUNTER_COMP_SIGNAL_BOOL(_name, _read, _write) \
+{ \
+ .type = COUNTER_COMP_BOOL, \
+ .name = (_name), \
+ .signal_u8_read = (_read), \
+ .signal_u8_write = (_write), \
+}
+
+struct counter_available {
+ union {
+ const u32 *enums;
+ const char *const *strs;
+ };
+ size_t num_items;
+};
+
+#define DEFINE_COUNTER_AVAILABLE(_name, _enums) \
+ struct counter_available _name = { \
+ .enums = (_enums), \
+ .num_items = ARRAY_SIZE(_enums), \
+ }
+
+#define DEFINE_COUNTER_ENUM(_name, _strs) \
+ struct counter_available _name = { \
+ .strs = (_strs), \
+ .num_items = ARRAY_SIZE(_strs), \
+ }
+
+#define COUNTER_COMP_DEVICE_ENUM(_name, _get, _set, _available) \
+{ \
+ .type = COUNTER_COMP_ENUM, \
+ .name = (_name), \
+ .device_u32_read = (_get), \
+ .device_u32_write = (_set), \
+ .priv = &(_available), \
+}
+#define COUNTER_COMP_COUNT_ENUM(_name, _get, _set, _available) \
+{ \
+ .type = COUNTER_COMP_ENUM, \
+ .name = (_name), \
+ .count_u32_read = (_get), \
+ .count_u32_write = (_set), \
+ .priv = &(_available), \
+}
+#define COUNTER_COMP_SIGNAL_ENUM(_name, _get, _set, _available) \
+{ \
+ .type = COUNTER_COMP_ENUM, \
+ .name = (_name), \
+ .signal_u32_read = (_get), \
+ .signal_u32_write = (_set), \
+ .priv = &(_available), \
+}
+
+#define COUNTER_COMP_CEILING(_read, _write) \
+ COUNTER_COMP_COUNT_U64("ceiling", _read, _write)
+
+#define COUNTER_COMP_COUNT_MODE(_read, _write, _available) \
+{ \
+ .type = COUNTER_COMP_COUNT_MODE, \
+ .name = "count_mode", \
+ .count_u32_read = (_read), \
+ .count_u32_write = (_write), \
+ .priv = &(_available), \
+}
+
+#define COUNTER_COMP_DIRECTION(_read) \
+{ \
+ .type = COUNTER_COMP_COUNT_DIRECTION, \
+ .name = "direction", \
+ .count_u32_read = (_read), \
+}
+
+#define COUNTER_COMP_ENABLE(_read, _write) \
+ COUNTER_COMP_COUNT_BOOL("enable", _read, _write)
+
+#define COUNTER_COMP_FLOOR(_read, _write) \
+ COUNTER_COMP_COUNT_U64("floor", _read, _write)
+
+#define COUNTER_COMP_PRESET(_read, _write) \
+ COUNTER_COMP_COUNT_U64("preset", _read, _write)
+
+#define COUNTER_COMP_PRESET_ENABLE(_read, _write) \
+ COUNTER_COMP_COUNT_BOOL("preset_enable", _read, _write)
#endif /* _COUNTER_H_ */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Counter interface enum functions
- * Copyright (C) 2018 William Breathitt Gray
- */
-#ifndef _COUNTER_ENUM_H_
-#define _COUNTER_ENUM_H_
-
-#include <linux/types.h>
-
-struct counter_device;
-struct counter_signal;
-struct counter_count;
-
-ssize_t counter_signal_enum_read(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- char *buf);
-ssize_t counter_signal_enum_write(struct counter_device *counter,
- struct counter_signal *signal, void *priv,
- const char *buf, size_t len);
-
-ssize_t counter_signal_enum_available_read(struct counter_device *counter,
- struct counter_signal *signal,
- void *priv, char *buf);
-
-ssize_t counter_count_enum_read(struct counter_device *counter,
- struct counter_count *count, void *priv,
- char *buf);
-ssize_t counter_count_enum_write(struct counter_device *counter,
- struct counter_count *count, void *priv,
- const char *buf, size_t len);
-
-ssize_t counter_count_enum_available_read(struct counter_device *counter,
- struct counter_count *count,
- void *priv, char *buf);
-
-ssize_t counter_device_enum_read(struct counter_device *counter, void *priv,
- char *buf);
-ssize_t counter_device_enum_write(struct counter_device *counter, void *priv,
- const char *buf, size_t len);
-
-ssize_t counter_device_enum_available_read(struct counter_device *counter,
- void *priv, char *buf);
-
-#endif /* _COUNTER_ENUM_H_ */
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