};
struct pi433_instance {
- struct pi433_device *device;
+ struct pi433_device *pi433;
struct pi433_tx_cfg tx_cfg;
/* control flags */
/* GPIO interrupt handlers */
static irqreturn_t DIO0_irq_handler(int irq, void *dev_id)
{
- struct pi433_device *device = dev_id;
-
- if (device->irq_state[DIO0] == DIO_PACKET_SENT) {
- device->free_in_fifo = FIFO_SIZE;
- dev_dbg(device->dev, "DIO0 irq: Packet sent\n");
- wake_up_interruptible(&device->fifo_wait_queue);
- } else if (device->irq_state[DIO0] == DIO_RSSI_DIO0) {
- dev_dbg(device->dev, "DIO0 irq: RSSI level over threshold\n");
- wake_up_interruptible(&device->rx_wait_queue);
- } else if (device->irq_state[DIO0] == DIO_PAYLOAD_READY) {
- dev_dbg(device->dev, "DIO0 irq: Payload ready\n");
- device->free_in_fifo = 0;
- wake_up_interruptible(&device->fifo_wait_queue);
+ struct pi433_device *pi433 = dev_id;
+
+ if (pi433->irq_state[DIO0] == DIO_PACKET_SENT) {
+ pi433->free_in_fifo = FIFO_SIZE;
+ dev_dbg(pi433->dev, "DIO0 irq: Packet sent\n");
+ wake_up_interruptible(&pi433->fifo_wait_queue);
+ } else if (pi433->irq_state[DIO0] == DIO_RSSI_DIO0) {
+ dev_dbg(pi433->dev, "DIO0 irq: RSSI level over threshold\n");
+ wake_up_interruptible(&pi433->rx_wait_queue);
+ } else if (pi433->irq_state[DIO0] == DIO_PAYLOAD_READY) {
+ dev_dbg(pi433->dev, "DIO0 irq: Payload ready\n");
+ pi433->free_in_fifo = 0;
+ wake_up_interruptible(&pi433->fifo_wait_queue);
}
return IRQ_HANDLED;
static irqreturn_t DIO1_irq_handler(int irq, void *dev_id)
{
- struct pi433_device *device = dev_id;
+ struct pi433_device *pi433 = dev_id;
- if (device->irq_state[DIO1] == DIO_FIFO_NOT_EMPTY_DIO1) {
- device->free_in_fifo = FIFO_SIZE;
- } else if (device->irq_state[DIO1] == DIO_FIFO_LEVEL) {
- if (device->rx_active)
- device->free_in_fifo = FIFO_THRESHOLD - 1;
+ if (pi433->irq_state[DIO1] == DIO_FIFO_NOT_EMPTY_DIO1) {
+ pi433->free_in_fifo = FIFO_SIZE;
+ } else if (pi433->irq_state[DIO1] == DIO_FIFO_LEVEL) {
+ if (pi433->rx_active)
+ pi433->free_in_fifo = FIFO_THRESHOLD - 1;
else
- device->free_in_fifo = FIFO_SIZE - FIFO_THRESHOLD - 1;
+ pi433->free_in_fifo = FIFO_SIZE - FIFO_THRESHOLD - 1;
}
- dev_dbg(device->dev,
- "DIO1 irq: %d bytes free in fifo\n", device->free_in_fifo);
- wake_up_interruptible(&device->fifo_wait_queue);
+ dev_dbg(pi433->dev,
+ "DIO1 irq: %d bytes free in fifo\n", pi433->free_in_fifo);
+ wake_up_interruptible(&pi433->fifo_wait_queue);
return IRQ_HANDLED;
}
/*-------------------------------------------------------------------------*/
static int
-rf69_set_rx_cfg(struct pi433_device *dev, struct pi433_rx_cfg *rx_cfg)
+rf69_set_rx_cfg(struct pi433_device *pi433, struct pi433_rx_cfg *rx_cfg)
{
int ret;
int payload_length;
/* receiver config */
- ret = rf69_set_frequency(dev->spi, rx_cfg->frequency);
+ ret = rf69_set_frequency(pi433->spi, rx_cfg->frequency);
if (ret < 0)
return ret;
- ret = rf69_set_modulation(dev->spi, rx_cfg->modulation);
+ ret = rf69_set_modulation(pi433->spi, rx_cfg->modulation);
if (ret < 0)
return ret;
- ret = rf69_set_bit_rate(dev->spi, rx_cfg->bit_rate);
+ ret = rf69_set_bit_rate(pi433->spi, rx_cfg->bit_rate);
if (ret < 0)
return ret;
- ret = rf69_set_antenna_impedance(dev->spi, rx_cfg->antenna_impedance);
+ ret = rf69_set_antenna_impedance(pi433->spi, rx_cfg->antenna_impedance);
if (ret < 0)
return ret;
- ret = rf69_set_rssi_threshold(dev->spi, rx_cfg->rssi_threshold);
+ ret = rf69_set_rssi_threshold(pi433->spi, rx_cfg->rssi_threshold);
if (ret < 0)
return ret;
- ret = rf69_set_ook_threshold_dec(dev->spi, rx_cfg->threshold_decrement);
+ ret = rf69_set_ook_threshold_dec(pi433->spi, rx_cfg->threshold_decrement);
if (ret < 0)
return ret;
- ret = rf69_set_bandwidth(dev->spi, rx_cfg->bw_mantisse,
+ ret = rf69_set_bandwidth(pi433->spi, rx_cfg->bw_mantisse,
rx_cfg->bw_exponent);
if (ret < 0)
return ret;
- ret = rf69_set_bandwidth_during_afc(dev->spi, rx_cfg->bw_mantisse,
+ ret = rf69_set_bandwidth_during_afc(pi433->spi, rx_cfg->bw_mantisse,
rx_cfg->bw_exponent);
if (ret < 0)
return ret;
- ret = rf69_set_dagc(dev->spi, rx_cfg->dagc);
+ ret = rf69_set_dagc(pi433->spi, rx_cfg->dagc);
if (ret < 0)
return ret;
- dev->rx_bytes_to_drop = rx_cfg->bytes_to_drop;
+ pi433->rx_bytes_to_drop = rx_cfg->bytes_to_drop;
/* packet config */
/* enable */
if (rx_cfg->enable_sync == OPTION_ON) {
- ret = rf69_enable_sync(dev->spi);
+ ret = rf69_enable_sync(pi433->spi);
if (ret < 0)
return ret;
- ret = rf69_set_fifo_fill_condition(dev->spi,
+ ret = rf69_set_fifo_fill_condition(pi433->spi,
after_sync_interrupt);
if (ret < 0)
return ret;
} else {
- ret = rf69_disable_sync(dev->spi);
+ ret = rf69_disable_sync(pi433->spi);
if (ret < 0)
return ret;
- ret = rf69_set_fifo_fill_condition(dev->spi, always);
+ ret = rf69_set_fifo_fill_condition(pi433->spi, always);
if (ret < 0)
return ret;
}
if (rx_cfg->enable_length_byte == OPTION_ON) {
- ret = rf69_set_packet_format(dev->spi, packet_length_var);
+ ret = rf69_set_packet_format(pi433->spi, packet_length_var);
if (ret < 0)
return ret;
} else {
- ret = rf69_set_packet_format(dev->spi, packet_length_fix);
+ ret = rf69_set_packet_format(pi433->spi, packet_length_fix);
if (ret < 0)
return ret;
}
- ret = rf69_set_address_filtering(dev->spi,
+ ret = rf69_set_address_filtering(pi433->spi,
rx_cfg->enable_address_filtering);
if (ret < 0)
return ret;
if (rx_cfg->enable_crc == OPTION_ON) {
- ret = rf69_enable_crc(dev->spi);
+ ret = rf69_enable_crc(pi433->spi);
if (ret < 0)
return ret;
} else {
- ret = rf69_disable_crc(dev->spi);
+ ret = rf69_disable_crc(pi433->spi);
if (ret < 0)
return ret;
}
/* lengths */
- ret = rf69_set_sync_size(dev->spi, rx_cfg->sync_length);
+ ret = rf69_set_sync_size(pi433->spi, rx_cfg->sync_length);
if (ret < 0)
return ret;
if (rx_cfg->enable_length_byte == OPTION_ON) {
- ret = rf69_set_payload_length(dev->spi, 0xff);
+ ret = rf69_set_payload_length(pi433->spi, 0xff);
if (ret < 0)
return ret;
} else if (rx_cfg->fixed_message_length != 0) {
payload_length++;
if (rx_cfg->enable_address_filtering != filtering_off)
payload_length++;
- ret = rf69_set_payload_length(dev->spi, payload_length);
+ ret = rf69_set_payload_length(pi433->spi, payload_length);
if (ret < 0)
return ret;
} else {
- ret = rf69_set_payload_length(dev->spi, 0);
+ ret = rf69_set_payload_length(pi433->spi, 0);
if (ret < 0)
return ret;
}
/* values */
if (rx_cfg->enable_sync == OPTION_ON) {
- ret = rf69_set_sync_values(dev->spi, rx_cfg->sync_pattern);
+ ret = rf69_set_sync_values(pi433->spi, rx_cfg->sync_pattern);
if (ret < 0)
return ret;
}
if (rx_cfg->enable_address_filtering != filtering_off) {
- ret = rf69_set_node_address(dev->spi, rx_cfg->node_address);
+ ret = rf69_set_node_address(pi433->spi, rx_cfg->node_address);
if (ret < 0)
return ret;
- ret = rf69_set_broadcast_address(dev->spi,
+ ret = rf69_set_broadcast_address(pi433->spi,
rx_cfg->broadcast_address);
if (ret < 0)
return ret;
}
static int
-rf69_set_tx_cfg(struct pi433_device *dev, struct pi433_tx_cfg *tx_cfg)
+rf69_set_tx_cfg(struct pi433_device *pi433, struct pi433_tx_cfg *tx_cfg)
{
int ret;
- ret = rf69_set_frequency(dev->spi, tx_cfg->frequency);
+ ret = rf69_set_frequency(pi433->spi, tx_cfg->frequency);
if (ret < 0)
return ret;
- ret = rf69_set_modulation(dev->spi, tx_cfg->modulation);
+ ret = rf69_set_modulation(pi433->spi, tx_cfg->modulation);
if (ret < 0)
return ret;
- ret = rf69_set_bit_rate(dev->spi, tx_cfg->bit_rate);
+ ret = rf69_set_bit_rate(pi433->spi, tx_cfg->bit_rate);
if (ret < 0)
return ret;
- ret = rf69_set_deviation(dev->spi, tx_cfg->dev_frequency);
+ ret = rf69_set_deviation(pi433->spi, tx_cfg->dev_frequency);
if (ret < 0)
return ret;
- ret = rf69_set_pa_ramp(dev->spi, tx_cfg->pa_ramp);
+ ret = rf69_set_pa_ramp(pi433->spi, tx_cfg->pa_ramp);
if (ret < 0)
return ret;
- ret = rf69_set_modulation_shaping(dev->spi, tx_cfg->mod_shaping);
+ ret = rf69_set_modulation_shaping(pi433->spi, tx_cfg->mod_shaping);
if (ret < 0)
return ret;
- ret = rf69_set_tx_start_condition(dev->spi, tx_cfg->tx_start_condition);
+ ret = rf69_set_tx_start_condition(pi433->spi, tx_cfg->tx_start_condition);
if (ret < 0)
return ret;
/* packet format enable */
if (tx_cfg->enable_preamble == OPTION_ON) {
- ret = rf69_set_preamble_length(dev->spi,
+ ret = rf69_set_preamble_length(pi433->spi,
tx_cfg->preamble_length);
if (ret < 0)
return ret;
} else {
- ret = rf69_set_preamble_length(dev->spi, 0);
+ ret = rf69_set_preamble_length(pi433->spi, 0);
if (ret < 0)
return ret;
}
if (tx_cfg->enable_sync == OPTION_ON) {
- ret = rf69_set_sync_size(dev->spi, tx_cfg->sync_length);
+ ret = rf69_set_sync_size(pi433->spi, tx_cfg->sync_length);
if (ret < 0)
return ret;
- ret = rf69_set_sync_values(dev->spi, tx_cfg->sync_pattern);
+ ret = rf69_set_sync_values(pi433->spi, tx_cfg->sync_pattern);
if (ret < 0)
return ret;
- ret = rf69_enable_sync(dev->spi);
+ ret = rf69_enable_sync(pi433->spi);
if (ret < 0)
return ret;
} else {
- ret = rf69_disable_sync(dev->spi);
+ ret = rf69_disable_sync(pi433->spi);
if (ret < 0)
return ret;
}
if (tx_cfg->enable_length_byte == OPTION_ON) {
- ret = rf69_set_packet_format(dev->spi, packet_length_var);
+ ret = rf69_set_packet_format(pi433->spi, packet_length_var);
if (ret < 0)
return ret;
} else {
- ret = rf69_set_packet_format(dev->spi, packet_length_fix);
+ ret = rf69_set_packet_format(pi433->spi, packet_length_fix);
if (ret < 0)
return ret;
}
if (tx_cfg->enable_crc == OPTION_ON) {
- ret = rf69_enable_crc(dev->spi);
+ ret = rf69_enable_crc(pi433->spi);
if (ret < 0)
return ret;
} else {
- ret = rf69_disable_crc(dev->spi);
+ ret = rf69_disable_crc(pi433->spi);
if (ret < 0)
return ret;
}
/*-------------------------------------------------------------------------*/
-static int pi433_start_rx(struct pi433_device *dev)
+static int pi433_start_rx(struct pi433_device *pi433)
{
int retval;
/* return without action, if no pending read request */
- if (!dev->rx_active)
+ if (!pi433->rx_active)
return 0;
/* setup for receiving */
- retval = rf69_set_rx_cfg(dev, &dev->rx_cfg);
+ retval = rf69_set_rx_cfg(pi433, &pi433->rx_cfg);
if (retval)
return retval;
/* setup rssi irq */
- retval = rf69_set_dio_mapping(dev->spi, DIO0, DIO_RSSI_DIO0);
+ retval = rf69_set_dio_mapping(pi433->spi, DIO0, DIO_RSSI_DIO0);
if (retval < 0)
return retval;
- dev->irq_state[DIO0] = DIO_RSSI_DIO0;
- irq_set_irq_type(dev->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
+ pi433->irq_state[DIO0] = DIO_RSSI_DIO0;
+ irq_set_irq_type(pi433->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
/* setup fifo level interrupt */
- retval = rf69_set_fifo_threshold(dev->spi, FIFO_SIZE - FIFO_THRESHOLD);
+ retval = rf69_set_fifo_threshold(pi433->spi, FIFO_SIZE - FIFO_THRESHOLD);
if (retval < 0)
return retval;
- retval = rf69_set_dio_mapping(dev->spi, DIO1, DIO_FIFO_LEVEL);
+ retval = rf69_set_dio_mapping(pi433->spi, DIO1, DIO_FIFO_LEVEL);
if (retval < 0)
return retval;
- dev->irq_state[DIO1] = DIO_FIFO_LEVEL;
- irq_set_irq_type(dev->irq_num[DIO1], IRQ_TYPE_EDGE_RISING);
+ pi433->irq_state[DIO1] = DIO_FIFO_LEVEL;
+ irq_set_irq_type(pi433->irq_num[DIO1], IRQ_TYPE_EDGE_RISING);
/* set module to receiving mode */
- retval = rf69_set_mode(dev->spi, receive);
+ retval = rf69_set_mode(pi433->spi, receive);
if (retval < 0)
return retval;
static int pi433_receive(void *data)
{
- struct pi433_device *dev = data;
- struct spi_device *spi = dev->spi;
+ struct pi433_device *pi433 = data;
+ struct spi_device *spi = pi433->spi;
int bytes_to_read, bytes_total;
int retval;
- dev->interrupt_rx_allowed = false;
+ pi433->interrupt_rx_allowed = false;
/* wait for any tx to finish */
- dev_dbg(dev->dev, "rx: going to wait for any tx to finish\n");
- retval = wait_event_interruptible(dev->rx_wait_queue, !dev->tx_active);
+ dev_dbg(pi433->dev, "rx: going to wait for any tx to finish\n");
+ retval = wait_event_interruptible(pi433->rx_wait_queue, !pi433->tx_active);
if (retval) {
/* wait was interrupted */
- dev->interrupt_rx_allowed = true;
- wake_up_interruptible(&dev->tx_wait_queue);
+ pi433->interrupt_rx_allowed = true;
+ wake_up_interruptible(&pi433->tx_wait_queue);
return retval;
}
/* prepare status vars */
- dev->free_in_fifo = FIFO_SIZE;
- dev->rx_position = 0;
- dev->rx_bytes_dropped = 0;
+ pi433->free_in_fifo = FIFO_SIZE;
+ pi433->rx_position = 0;
+ pi433->rx_bytes_dropped = 0;
/* setup radio module to listen for something "in the air" */
- retval = pi433_start_rx(dev);
+ retval = pi433_start_rx(pi433);
if (retval)
return retval;
/* now check RSSI, if low wait for getting high (RSSI interrupt) */
while (!(rf69_read_reg(spi, REG_IRQFLAGS1) & MASK_IRQFLAGS1_RSSI)) {
/* allow tx to interrupt us while waiting for high RSSI */
- dev->interrupt_rx_allowed = true;
- wake_up_interruptible(&dev->tx_wait_queue);
+ pi433->interrupt_rx_allowed = true;
+ wake_up_interruptible(&pi433->tx_wait_queue);
/* wait for RSSI level to become high */
- dev_dbg(dev->dev, "rx: going to wait for high RSSI level\n");
- retval = wait_event_interruptible(dev->rx_wait_queue,
+ dev_dbg(pi433->dev, "rx: going to wait for high RSSI level\n");
+ retval = wait_event_interruptible(pi433->rx_wait_queue,
rf69_read_reg(spi, REG_IRQFLAGS1) &
MASK_IRQFLAGS1_RSSI);
if (retval) /* wait was interrupted */
goto abort;
- dev->interrupt_rx_allowed = false;
+ pi433->interrupt_rx_allowed = false;
/* cross check for ongoing tx */
- if (!dev->tx_active)
+ if (!pi433->tx_active)
break;
}
retval = rf69_set_dio_mapping(spi, DIO0, DIO_PAYLOAD_READY);
if (retval < 0)
goto abort;
- dev->irq_state[DIO0] = DIO_PAYLOAD_READY;
- irq_set_irq_type(dev->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
+ pi433->irq_state[DIO0] = DIO_PAYLOAD_READY;
+ irq_set_irq_type(pi433->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
/* fixed or unlimited length? */
- if (dev->rx_cfg.fixed_message_length != 0) {
- if (dev->rx_cfg.fixed_message_length > dev->rx_buffer_size) {
+ if (pi433->rx_cfg.fixed_message_length != 0) {
+ if (pi433->rx_cfg.fixed_message_length > pi433->rx_buffer_size) {
retval = -1;
goto abort;
}
- bytes_total = dev->rx_cfg.fixed_message_length;
- dev_dbg(dev->dev, "rx: msg len set to %d by fixed length\n",
+ bytes_total = pi433->rx_cfg.fixed_message_length;
+ dev_dbg(pi433->dev, "rx: msg len set to %d by fixed length\n",
bytes_total);
} else {
- bytes_total = dev->rx_buffer_size;
- dev_dbg(dev->dev, "rx: msg len set to %d as requested by read\n",
+ bytes_total = pi433->rx_buffer_size;
+ dev_dbg(pi433->dev, "rx: msg len set to %d as requested by read\n",
bytes_total);
}
/* length byte enabled? */
- if (dev->rx_cfg.enable_length_byte == OPTION_ON) {
- retval = wait_event_interruptible(dev->fifo_wait_queue,
- dev->free_in_fifo < FIFO_SIZE);
+ if (pi433->rx_cfg.enable_length_byte == OPTION_ON) {
+ retval = wait_event_interruptible(pi433->fifo_wait_queue,
+ pi433->free_in_fifo < FIFO_SIZE);
if (retval) /* wait was interrupted */
goto abort;
rf69_read_fifo(spi, (u8 *)&bytes_total, 1);
- if (bytes_total > dev->rx_buffer_size) {
+ if (bytes_total > pi433->rx_buffer_size) {
retval = -1;
goto abort;
}
- dev->free_in_fifo++;
- dev_dbg(dev->dev, "rx: msg len reset to %d due to length byte\n",
+ pi433->free_in_fifo++;
+ dev_dbg(pi433->dev, "rx: msg len reset to %d due to length byte\n",
bytes_total);
}
/* address byte enabled? */
- if (dev->rx_cfg.enable_address_filtering != filtering_off) {
+ if (pi433->rx_cfg.enable_address_filtering != filtering_off) {
u8 dummy;
bytes_total--;
- retval = wait_event_interruptible(dev->fifo_wait_queue,
- dev->free_in_fifo < FIFO_SIZE);
+ retval = wait_event_interruptible(pi433->fifo_wait_queue,
+ pi433->free_in_fifo < FIFO_SIZE);
if (retval) /* wait was interrupted */
goto abort;
rf69_read_fifo(spi, &dummy, 1);
- dev->free_in_fifo++;
- dev_dbg(dev->dev, "rx: address byte stripped off\n");
+ pi433->free_in_fifo++;
+ dev_dbg(pi433->dev, "rx: address byte stripped off\n");
}
/* get payload */
- while (dev->rx_position < bytes_total) {
+ while (pi433->rx_position < bytes_total) {
if (!(rf69_read_reg(spi, REG_IRQFLAGS2) & MASK_IRQFLAGS2_PAYLOAD_READY)) {
- retval = wait_event_interruptible(dev->fifo_wait_queue,
- dev->free_in_fifo < FIFO_SIZE);
+ retval = wait_event_interruptible(pi433->fifo_wait_queue,
+ pi433->free_in_fifo < FIFO_SIZE);
if (retval) /* wait was interrupted */
goto abort;
}
/* need to drop bytes or acquire? */
- if (dev->rx_bytes_to_drop > dev->rx_bytes_dropped)
- bytes_to_read = dev->rx_bytes_to_drop -
- dev->rx_bytes_dropped;
+ if (pi433->rx_bytes_to_drop > pi433->rx_bytes_dropped)
+ bytes_to_read = pi433->rx_bytes_to_drop -
+ pi433->rx_bytes_dropped;
else
- bytes_to_read = bytes_total - dev->rx_position;
+ bytes_to_read = bytes_total - pi433->rx_position;
/* access the fifo */
- if (bytes_to_read > FIFO_SIZE - dev->free_in_fifo)
- bytes_to_read = FIFO_SIZE - dev->free_in_fifo;
+ if (bytes_to_read > FIFO_SIZE - pi433->free_in_fifo)
+ bytes_to_read = FIFO_SIZE - pi433->free_in_fifo;
retval = rf69_read_fifo(spi,
- &dev->rx_buffer[dev->rx_position],
+ &pi433->rx_buffer[pi433->rx_position],
bytes_to_read);
if (retval) /* read failed */
goto abort;
- dev->free_in_fifo += bytes_to_read;
+ pi433->free_in_fifo += bytes_to_read;
/* adjust status vars */
- if (dev->rx_bytes_to_drop > dev->rx_bytes_dropped)
- dev->rx_bytes_dropped += bytes_to_read;
+ if (pi433->rx_bytes_to_drop > pi433->rx_bytes_dropped)
+ pi433->rx_bytes_dropped += bytes_to_read;
else
- dev->rx_position += bytes_to_read;
+ pi433->rx_position += bytes_to_read;
}
/* rx done, wait was interrupted or error occurred */
abort:
- dev->interrupt_rx_allowed = true;
- if (rf69_set_mode(dev->spi, standby))
+ pi433->interrupt_rx_allowed = true;
+ if (rf69_set_mode(pi433->spi, standby))
pr_err("rf69_set_mode(): radio module failed to go standby\n");
- wake_up_interruptible(&dev->tx_wait_queue);
+ wake_up_interruptible(&pi433->tx_wait_queue);
if (retval)
return retval;
static int pi433_tx_thread(void *data)
{
- struct pi433_device *device = data;
- struct spi_device *spi = device->spi;
+ struct pi433_device *pi433 = data;
+ struct spi_device *spi = pi433->spi;
struct pi433_tx_cfg tx_cfg;
size_t size;
bool rx_interrupted = false;
while (1) {
/* wait for fifo to be populated or for request to terminate*/
- dev_dbg(device->dev, "thread: going to wait for new messages\n");
- wait_event_interruptible(device->tx_wait_queue,
- (!kfifo_is_empty(&device->tx_fifo) ||
+ dev_dbg(pi433->dev, "thread: going to wait for new messages\n");
+ wait_event_interruptible(pi433->tx_wait_queue,
+ (!kfifo_is_empty(&pi433->tx_fifo) ||
kthread_should_stop()));
if (kthread_should_stop())
return 0;
* - size of message
* - message
*/
- retval = kfifo_out(&device->tx_fifo, &tx_cfg, sizeof(tx_cfg));
+ retval = kfifo_out(&pi433->tx_fifo, &tx_cfg, sizeof(tx_cfg));
if (retval != sizeof(tx_cfg)) {
- dev_dbg(device->dev,
+ dev_dbg(pi433->dev,
"reading tx_cfg from fifo failed: got %d byte(s), expected %d\n",
retval, (unsigned int)sizeof(tx_cfg));
continue;
}
- retval = kfifo_out(&device->tx_fifo, &size, sizeof(size_t));
+ retval = kfifo_out(&pi433->tx_fifo, &size, sizeof(size_t));
if (retval != sizeof(size_t)) {
- dev_dbg(device->dev,
+ dev_dbg(pi433->dev,
"reading msg size from fifo failed: got %d, expected %d\n",
retval, (unsigned int)sizeof(size_t));
continue;
size++;
/* prime tx_buffer */
- memset(device->tx_buffer, 0, size);
+ memset(pi433->tx_buffer, 0, size);
position = 0;
/* add length byte, if requested */
* according to spec, length byte itself must be
* excluded from the length calculation
*/
- device->tx_buffer[position++] = size - 1;
+ pi433->tx_buffer[position++] = size - 1;
/* add adr byte, if requested */
if (tx_cfg.enable_address_byte == OPTION_ON)
- device->tx_buffer[position++] = tx_cfg.address_byte;
+ pi433->tx_buffer[position++] = tx_cfg.address_byte;
/* finally get message data from fifo */
- retval = kfifo_out(&device->tx_fifo, &device->tx_buffer[position],
- sizeof(device->tx_buffer) - position);
- dev_dbg(device->dev,
+ retval = kfifo_out(&pi433->tx_fifo, &pi433->tx_buffer[position],
+ sizeof(pi433->tx_buffer) - position);
+ dev_dbg(pi433->dev,
"read %d message byte(s) from fifo queue.\n", retval);
/*
* place otherwise we need to wait for the incoming telegram
* to finish
*/
- wait_event_interruptible(device->tx_wait_queue,
- !device->rx_active ||
- device->interrupt_rx_allowed);
+ wait_event_interruptible(pi433->tx_wait_queue,
+ !pi433->rx_active ||
+ pi433->interrupt_rx_allowed);
/*
* prevent race conditions
* irq will be re-enabled after tx config is set
*/
- disable_irq(device->irq_num[DIO0]);
- device->tx_active = true;
+ disable_irq(pi433->irq_num[DIO0]);
+ pi433->tx_active = true;
/* clear fifo, set fifo threshold, set payload length */
retval = rf69_set_mode(spi, standby); /* this clears the fifo */
if (retval < 0)
goto abort;
- if (device->rx_active && !rx_interrupted) {
+ if (pi433->rx_active && !rx_interrupted) {
/*
* rx is currently waiting for a telegram;
* we need to set the radio module to standby
}
/* configure the rf chip */
- retval = rf69_set_tx_cfg(device, &tx_cfg);
+ retval = rf69_set_tx_cfg(pi433, &tx_cfg);
if (retval < 0)
goto abort;
retval = rf69_set_dio_mapping(spi, DIO1, DIO_FIFO_LEVEL);
if (retval < 0)
goto abort;
- device->irq_state[DIO1] = DIO_FIFO_LEVEL;
- irq_set_irq_type(device->irq_num[DIO1], IRQ_TYPE_EDGE_FALLING);
+ pi433->irq_state[DIO1] = DIO_FIFO_LEVEL;
+ irq_set_irq_type(pi433->irq_num[DIO1], IRQ_TYPE_EDGE_FALLING);
/* enable packet sent interrupt */
retval = rf69_set_dio_mapping(spi, DIO0, DIO_PACKET_SENT);
if (retval < 0)
goto abort;
- device->irq_state[DIO0] = DIO_PACKET_SENT;
- irq_set_irq_type(device->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
- enable_irq(device->irq_num[DIO0]); /* was disabled by rx active check */
+ pi433->irq_state[DIO0] = DIO_PACKET_SENT;
+ irq_set_irq_type(pi433->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
+ enable_irq(pi433->irq_num[DIO0]); /* was disabled by rx active check */
/* enable transmission */
retval = rf69_set_mode(spi, transmit);
goto abort;
/* transfer this msg (and repetitions) to chip fifo */
- device->free_in_fifo = FIFO_SIZE;
+ pi433->free_in_fifo = FIFO_SIZE;
position = 0;
repetitions = tx_cfg.repetitions;
while ((repetitions > 0) && (size > position)) {
- if ((size - position) > device->free_in_fifo) {
+ if ((size - position) > pi433->free_in_fifo) {
/* msg to big for fifo - take a part */
- int write_size = device->free_in_fifo;
+ int write_size = pi433->free_in_fifo;
- device->free_in_fifo = 0;
+ pi433->free_in_fifo = 0;
rf69_write_fifo(spi,
- &device->tx_buffer[position],
+ &pi433->tx_buffer[position],
write_size);
position += write_size;
} else {
/* msg fits into fifo - take all */
- device->free_in_fifo -= size;
+ pi433->free_in_fifo -= size;
repetitions--;
rf69_write_fifo(spi,
- &device->tx_buffer[position],
+ &pi433->tx_buffer[position],
(size - position));
position = 0; /* reset for next repetition */
}
- retval = wait_event_interruptible(device->fifo_wait_queue,
- device->free_in_fifo > 0);
+ retval = wait_event_interruptible(pi433->fifo_wait_queue,
+ pi433->free_in_fifo > 0);
if (retval) {
- dev_dbg(device->dev, "ABORT\n");
+ dev_dbg(pi433->dev, "ABORT\n");
goto abort;
}
}
/* we are done. Wait for packet to get sent */
- dev_dbg(device->dev,
+ dev_dbg(pi433->dev,
"thread: wait for packet to get sent/fifo to be empty\n");
- wait_event_interruptible(device->fifo_wait_queue,
- device->free_in_fifo == FIFO_SIZE ||
+ wait_event_interruptible(pi433->fifo_wait_queue,
+ pi433->free_in_fifo == FIFO_SIZE ||
kthread_should_stop());
if (kthread_should_stop())
return 0;
/* STOP_TRANSMISSION */
- dev_dbg(device->dev, "thread: Packet sent. Set mode to stby.\n");
+ dev_dbg(pi433->dev, "thread: Packet sent. Set mode to stby.\n");
retval = rf69_set_mode(spi, standby);
if (retval < 0)
goto abort;
/* everything sent? */
- if (kfifo_is_empty(&device->tx_fifo)) {
+ if (kfifo_is_empty(&pi433->tx_fifo)) {
abort:
if (rx_interrupted) {
rx_interrupted = false;
- pi433_start_rx(device);
+ pi433_start_rx(pi433);
}
- device->tx_active = false;
- wake_up_interruptible(&device->rx_wait_queue);
+ pi433->tx_active = false;
+ wake_up_interruptible(&pi433->rx_wait_queue);
}
}
}
pi433_read(struct file *filp, char __user *buf, size_t size, loff_t *f_pos)
{
struct pi433_instance *instance;
- struct pi433_device *device;
+ struct pi433_device *pi433;
int bytes_received;
ssize_t retval;
return -EMSGSIZE;
instance = filp->private_data;
- device = instance->device;
+ pi433 = instance->pi433;
/* just one read request at a time */
- mutex_lock(&device->rx_lock);
- if (device->rx_active) {
- mutex_unlock(&device->rx_lock);
+ mutex_lock(&pi433->rx_lock);
+ if (pi433->rx_active) {
+ mutex_unlock(&pi433->rx_lock);
return -EAGAIN;
}
- device->rx_active = true;
- mutex_unlock(&device->rx_lock);
+ pi433->rx_active = true;
+ mutex_unlock(&pi433->rx_lock);
/* start receiving */
/* will block until something was received*/
- device->rx_buffer_size = size;
- bytes_received = pi433_receive(device);
+ pi433->rx_buffer_size = size;
+ bytes_received = pi433_receive(pi433);
/* release rx */
- mutex_lock(&device->rx_lock);
- device->rx_active = false;
- mutex_unlock(&device->rx_lock);
+ mutex_lock(&pi433->rx_lock);
+ pi433->rx_active = false;
+ mutex_unlock(&pi433->rx_lock);
/* if read was successful copy to user space*/
if (bytes_received > 0) {
- retval = copy_to_user(buf, device->rx_buffer, bytes_received);
+ retval = copy_to_user(buf, pi433->rx_buffer, bytes_received);
if (retval)
return -EFAULT;
}
size_t count, loff_t *f_pos)
{
struct pi433_instance *instance;
- struct pi433_device *device;
+ struct pi433_device *pi433;
int retval;
unsigned int required, available, copied;
instance = filp->private_data;
- device = instance->device;
+ pi433 = instance->pi433;
/*
* check, whether internal buffer (tx thread) is big enough
* config the RF trasmitter correctly due to invalid settings
*/
if (!instance->tx_cfg_initialized) {
- dev_notice_once(device->dev,
+ dev_notice_once(pi433->dev,
"write: failed due to unconfigured tx_cfg (see PI433_IOC_WR_TX_CFG)\n");
return -EINVAL;
}
* - size of message
* - message
*/
- mutex_lock(&device->tx_fifo_lock);
+ mutex_lock(&pi433->tx_fifo_lock);
required = sizeof(instance->tx_cfg) + sizeof(size_t) + count;
- available = kfifo_avail(&device->tx_fifo);
+ available = kfifo_avail(&pi433->tx_fifo);
if (required > available) {
- dev_dbg(device->dev, "write to fifo failed: %d bytes required but %d available\n",
+ dev_dbg(pi433->dev, "write to fifo failed: %d bytes required but %d available\n",
required, available);
- mutex_unlock(&device->tx_fifo_lock);
+ mutex_unlock(&pi433->tx_fifo_lock);
return -EAGAIN;
}
- retval = kfifo_in(&device->tx_fifo, &instance->tx_cfg,
+ retval = kfifo_in(&pi433->tx_fifo, &instance->tx_cfg,
sizeof(instance->tx_cfg));
if (retval != sizeof(instance->tx_cfg))
goto abort;
- retval = kfifo_in(&device->tx_fifo, &count, sizeof(size_t));
+ retval = kfifo_in(&pi433->tx_fifo, &count, sizeof(size_t));
if (retval != sizeof(size_t))
goto abort;
- retval = kfifo_from_user(&device->tx_fifo, buf, count, &copied);
+ retval = kfifo_from_user(&pi433->tx_fifo, buf, count, &copied);
if (retval || copied != count)
goto abort;
- mutex_unlock(&device->tx_fifo_lock);
+ mutex_unlock(&pi433->tx_fifo_lock);
/* start transfer */
- wake_up_interruptible(&device->tx_wait_queue);
- dev_dbg(device->dev, "write: generated new msg with %d bytes.\n", copied);
+ wake_up_interruptible(&pi433->tx_wait_queue);
+ dev_dbg(pi433->dev, "write: generated new msg with %d bytes.\n", copied);
return copied;
abort:
- dev_warn(device->dev,
+ dev_warn(pi433->dev,
"write to fifo failed, non recoverable: 0x%x\n", retval);
- mutex_unlock(&device->tx_fifo_lock);
+ mutex_unlock(&pi433->tx_fifo_lock);
return -EAGAIN;
}
static long pi433_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct pi433_instance *instance;
- struct pi433_device *device;
+ struct pi433_device *pi433;
struct pi433_tx_cfg tx_cfg;
void __user *argp = (void __user *)arg;
return -ENOTTY;
instance = filp->private_data;
- device = instance->device;
+ pi433 = instance->pi433;
- if (!device)
+ if (!pi433)
return -ESHUTDOWN;
switch (cmd) {
case PI433_IOC_WR_TX_CFG:
if (copy_from_user(&tx_cfg, argp, sizeof(struct pi433_tx_cfg)))
return -EFAULT;
- mutex_lock(&device->tx_fifo_lock);
+ mutex_lock(&pi433->tx_fifo_lock);
memcpy(&instance->tx_cfg, &tx_cfg, sizeof(struct pi433_tx_cfg));
instance->tx_cfg_initialized = true;
- mutex_unlock(&device->tx_fifo_lock);
+ mutex_unlock(&pi433->tx_fifo_lock);
break;
case PI433_IOC_RD_RX_CFG:
- if (copy_to_user(argp, &device->rx_cfg,
+ if (copy_to_user(argp, &pi433->rx_cfg,
sizeof(struct pi433_rx_cfg)))
return -EFAULT;
break;
case PI433_IOC_WR_RX_CFG:
- mutex_lock(&device->rx_lock);
+ mutex_lock(&pi433->rx_lock);
/* during pending read request, change of config not allowed */
- if (device->rx_active) {
- mutex_unlock(&device->rx_lock);
+ if (pi433->rx_active) {
+ mutex_unlock(&pi433->rx_lock);
return -EAGAIN;
}
- if (copy_from_user(&device->rx_cfg, argp,
+ if (copy_from_user(&pi433->rx_cfg, argp,
sizeof(struct pi433_rx_cfg))) {
- mutex_unlock(&device->rx_lock);
+ mutex_unlock(&pi433->rx_lock);
return -EFAULT;
}
- mutex_unlock(&device->rx_lock);
+ mutex_unlock(&pi433->rx_lock);
break;
default:
return -EINVAL;
static int pi433_open(struct inode *inode, struct file *filp)
{
- struct pi433_device *device;
+ struct pi433_device *pi433;
struct pi433_instance *instance;
mutex_lock(&minor_lock);
- device = idr_find(&pi433_idr, iminor(inode));
+ pi433 = idr_find(&pi433_idr, iminor(inode));
mutex_unlock(&minor_lock);
- if (!device) {
+ if (!pi433) {
pr_debug("device: minor %d unknown.\n", iminor(inode));
return -ENODEV;
}
return -ENOMEM;
/* setup instance data*/
- instance->device = device;
+ instance->pi433 = pi433;
/* instance data as context */
filp->private_data = instance;
/*-------------------------------------------------------------------------*/
-static int setup_gpio(struct pi433_device *device)
+static int setup_gpio(struct pi433_device *pi433)
{
char name[5];
int retval;
for (i = 0; i < NUM_DIO; i++) {
/* "construct" name and get the gpio descriptor */
snprintf(name, sizeof(name), "DIO%d", i);
- device->gpiod[i] = gpiod_get(&device->spi->dev, name,
- 0 /*GPIOD_IN*/);
+ pi433->gpiod[i] = gpiod_get(&pi433->spi->dev, name,
+ 0 /*GPIOD_IN*/);
- if (device->gpiod[i] == ERR_PTR(-ENOENT)) {
- dev_dbg(&device->spi->dev,
+ if (pi433->gpiod[i] == ERR_PTR(-ENOENT)) {
+ dev_dbg(&pi433->spi->dev,
"Could not find entry for %s. Ignoring.\n", name);
continue;
}
- if (device->gpiod[i] == ERR_PTR(-EBUSY))
- dev_dbg(&device->spi->dev, "%s is busy.\n", name);
+ if (pi433->gpiod[i] == ERR_PTR(-EBUSY))
+ dev_dbg(&pi433->spi->dev, "%s is busy.\n", name);
- if (IS_ERR(device->gpiod[i])) {
- retval = PTR_ERR(device->gpiod[i]);
+ if (IS_ERR(pi433->gpiod[i])) {
+ retval = PTR_ERR(pi433->gpiod[i]);
/* release already allocated gpios */
for (i--; i >= 0; i--) {
- free_irq(device->irq_num[i], device);
- gpiod_put(device->gpiod[i]);
+ free_irq(pi433->irq_num[i], pi433);
+ gpiod_put(pi433->gpiod[i]);
}
return retval;
}
/* configure the pin */
- retval = gpiod_direction_input(device->gpiod[i]);
+ retval = gpiod_direction_input(pi433->gpiod[i]);
if (retval)
return retval;
/* configure irq */
- device->irq_num[i] = gpiod_to_irq(device->gpiod[i]);
- if (device->irq_num[i] < 0) {
- device->gpiod[i] = ERR_PTR(-EINVAL);
- return device->irq_num[i];
+ pi433->irq_num[i] = gpiod_to_irq(pi433->gpiod[i]);
+ if (pi433->irq_num[i] < 0) {
+ pi433->gpiod[i] = ERR_PTR(-EINVAL);
+ return pi433->irq_num[i];
}
- retval = request_irq(device->irq_num[i],
+ retval = request_irq(pi433->irq_num[i],
DIO_irq_handler[i],
0, /* flags */
name,
- device);
+ pi433);
if (retval)
return retval;
- dev_dbg(&device->spi->dev, "%s successfully configured\n", name);
+ dev_dbg(&pi433->spi->dev, "%s successfully configured\n", name);
}
return 0;
}
-static void free_gpio(struct pi433_device *device)
+static void free_gpio(struct pi433_device *pi433)
{
int i;
for (i = 0; i < NUM_DIO; i++) {
/* check if gpiod is valid */
- if (IS_ERR(device->gpiod[i]))
+ if (IS_ERR(pi433->gpiod[i]))
continue;
- free_irq(device->irq_num[i], device);
- gpiod_put(device->gpiod[i]);
+ free_irq(pi433->irq_num[i], pi433);
+ gpiod_put(pi433->gpiod[i]);
}
}
-static int pi433_get_minor(struct pi433_device *device)
+static int pi433_get_minor(struct pi433_device *pi433)
{
int retval = -ENOMEM;
mutex_lock(&minor_lock);
- retval = idr_alloc(&pi433_idr, device, 0, N_PI433_MINORS, GFP_KERNEL);
+ retval = idr_alloc(&pi433_idr, pi433, 0, N_PI433_MINORS, GFP_KERNEL);
if (retval >= 0) {
- device->minor = retval;
+ pi433->minor = retval;
retval = 0;
} else if (retval == -ENOSPC) {
- dev_err(&device->spi->dev, "too many pi433 devices\n");
+ dev_err(&pi433->spi->dev, "too many pi433 devices\n");
retval = -EINVAL;
}
mutex_unlock(&minor_lock);
return retval;
}
-static void pi433_free_minor(struct pi433_device *dev)
+static void pi433_free_minor(struct pi433_device *pi433)
{
mutex_lock(&minor_lock);
- idr_remove(&pi433_idr, dev->minor);
+ idr_remove(&pi433_idr, pi433->minor);
mutex_unlock(&minor_lock);
}
static int pi433_debugfs_regs_show(struct seq_file *m, void *p)
{
- struct pi433_device *dev;
+ struct pi433_device *pi433;
u8 reg_data[114];
int i;
char *fmt = "0x%02x, 0x%02x\n";
int ret;
- dev = m->private;
+ pi433 = m->private;
- mutex_lock(&dev->tx_fifo_lock);
- mutex_lock(&dev->rx_lock);
+ mutex_lock(&pi433->tx_fifo_lock);
+ mutex_lock(&pi433->rx_lock);
// wait for on-going operations to finish
- ret = wait_event_interruptible(dev->rx_wait_queue, !dev->tx_active);
+ ret = wait_event_interruptible(pi433->rx_wait_queue, !pi433->tx_active);
if (ret)
goto out_unlock;
- ret = wait_event_interruptible(dev->tx_wait_queue, !dev->rx_active);
+ ret = wait_event_interruptible(pi433->tx_wait_queue, !pi433->rx_active);
if (ret)
goto out_unlock;
// skip FIFO register (0x0) otherwise this can affect some of uC ops
for (i = 1; i < 0x50; i++)
- reg_data[i] = rf69_read_reg(dev->spi, i);
+ reg_data[i] = rf69_read_reg(pi433->spi, i);
- reg_data[REG_TESTLNA] = rf69_read_reg(dev->spi, REG_TESTLNA);
- reg_data[REG_TESTPA1] = rf69_read_reg(dev->spi, REG_TESTPA1);
- reg_data[REG_TESTPA2] = rf69_read_reg(dev->spi, REG_TESTPA2);
- reg_data[REG_TESTDAGC] = rf69_read_reg(dev->spi, REG_TESTDAGC);
- reg_data[REG_TESTAFC] = rf69_read_reg(dev->spi, REG_TESTAFC);
+ reg_data[REG_TESTLNA] = rf69_read_reg(pi433->spi, REG_TESTLNA);
+ reg_data[REG_TESTPA1] = rf69_read_reg(pi433->spi, REG_TESTPA1);
+ reg_data[REG_TESTPA2] = rf69_read_reg(pi433->spi, REG_TESTPA2);
+ reg_data[REG_TESTDAGC] = rf69_read_reg(pi433->spi, REG_TESTDAGC);
+ reg_data[REG_TESTAFC] = rf69_read_reg(pi433->spi, REG_TESTAFC);
seq_puts(m, "# reg, val\n");
seq_printf(m, fmt, REG_TESTAFC, reg_data[REG_TESTAFC]);
out_unlock:
- mutex_unlock(&dev->rx_lock);
- mutex_unlock(&dev->tx_fifo_lock);
+ mutex_unlock(&pi433->rx_lock);
+ mutex_unlock(&pi433->tx_fifo_lock);
return ret;
}
static int pi433_probe(struct spi_device *spi)
{
- struct pi433_device *device;
+ struct pi433_device *pi433;
int retval;
struct dentry *entry;
}
/* Allocate driver data */
- device = kzalloc(sizeof(*device), GFP_KERNEL);
- if (!device)
+ pi433 = kzalloc(sizeof(*pi433), GFP_KERNEL);
+ if (!pi433)
return -ENOMEM;
/* Initialize the driver data */
- device->spi = spi;
- device->rx_active = false;
- device->tx_active = false;
- device->interrupt_rx_allowed = false;
+ pi433->spi = spi;
+ pi433->rx_active = false;
+ pi433->tx_active = false;
+ pi433->interrupt_rx_allowed = false;
/* init rx buffer */
- device->rx_buffer = kmalloc(MAX_MSG_SIZE, GFP_KERNEL);
- if (!device->rx_buffer) {
+ pi433->rx_buffer = kmalloc(MAX_MSG_SIZE, GFP_KERNEL);
+ if (!pi433->rx_buffer) {
retval = -ENOMEM;
goto RX_failed;
}
/* init wait queues */
- init_waitqueue_head(&device->tx_wait_queue);
- init_waitqueue_head(&device->rx_wait_queue);
- init_waitqueue_head(&device->fifo_wait_queue);
+ init_waitqueue_head(&pi433->tx_wait_queue);
+ init_waitqueue_head(&pi433->rx_wait_queue);
+ init_waitqueue_head(&pi433->fifo_wait_queue);
/* init fifo */
- INIT_KFIFO(device->tx_fifo);
+ INIT_KFIFO(pi433->tx_fifo);
/* init mutexes and locks */
- mutex_init(&device->tx_fifo_lock);
- mutex_init(&device->rx_lock);
+ mutex_init(&pi433->tx_fifo_lock);
+ mutex_init(&pi433->rx_lock);
/* setup GPIO (including irq_handler) for the different DIOs */
- retval = setup_gpio(device);
+ retval = setup_gpio(pi433);
if (retval) {
dev_dbg(&spi->dev, "setup of GPIOs failed\n");
goto GPIO_failed;
goto minor_failed;
/* determ minor number */
- retval = pi433_get_minor(device);
+ retval = pi433_get_minor(pi433);
if (retval) {
dev_dbg(&spi->dev, "get of minor number failed\n");
goto minor_failed;
}
/* create device */
- device->devt = MKDEV(MAJOR(pi433_dev), device->minor);
- device->dev = device_create(&pi433_class,
- &spi->dev,
- device->devt,
- device,
- "pi433.%d",
- device->minor);
- if (IS_ERR(device->dev)) {
+ pi433->devt = MKDEV(MAJOR(pi433_dev), pi433->minor);
+ pi433->dev = device_create(&pi433_class,
+ &spi->dev,
+ pi433->devt,
+ pi433,
+ "pi433.%d",
+ pi433->minor);
+ if (IS_ERR(pi433->dev)) {
pr_err("pi433: device register failed\n");
- retval = PTR_ERR(device->dev);
+ retval = PTR_ERR(pi433->dev);
goto device_create_failed;
} else {
- dev_dbg(device->dev,
+ dev_dbg(pi433->dev,
"created device for major %d, minor %d\n",
MAJOR(pi433_dev),
- device->minor);
+ pi433->minor);
}
/* start tx thread */
- device->tx_task_struct = kthread_run(pi433_tx_thread,
- device,
- "pi433.%d_tx_task",
- device->minor);
- if (IS_ERR(device->tx_task_struct)) {
- dev_dbg(device->dev, "start of send thread failed\n");
- retval = PTR_ERR(device->tx_task_struct);
+ pi433->tx_task_struct = kthread_run(pi433_tx_thread,
+ pi433,
+ "pi433.%d_tx_task",
+ pi433->minor);
+ if (IS_ERR(pi433->tx_task_struct)) {
+ dev_dbg(pi433->dev, "start of send thread failed\n");
+ retval = PTR_ERR(pi433->tx_task_struct);
goto send_thread_failed;
}
/* create cdev */
- device->cdev = cdev_alloc();
- if (!device->cdev) {
- dev_dbg(device->dev, "allocation of cdev failed\n");
+ pi433->cdev = cdev_alloc();
+ if (!pi433->cdev) {
+ dev_dbg(pi433->dev, "allocation of cdev failed\n");
retval = -ENOMEM;
goto cdev_failed;
}
- device->cdev->owner = THIS_MODULE;
- cdev_init(device->cdev, &pi433_fops);
- retval = cdev_add(device->cdev, device->devt, 1);
+ pi433->cdev->owner = THIS_MODULE;
+ cdev_init(pi433->cdev, &pi433_fops);
+ retval = cdev_add(pi433->cdev, pi433->devt, 1);
if (retval) {
- dev_dbg(device->dev, "register of cdev failed\n");
+ dev_dbg(pi433->dev, "register of cdev failed\n");
goto del_cdev;
}
/* spi setup */
- spi_set_drvdata(spi, device);
+ spi_set_drvdata(spi, pi433);
- entry = debugfs_create_dir(dev_name(device->dev), root_dir);
- debugfs_create_file("regs", 0400, entry, device, &pi433_debugfs_regs_fops);
+ entry = debugfs_create_dir(dev_name(pi433->dev), root_dir);
+ debugfs_create_file("regs", 0400, entry, pi433, &pi433_debugfs_regs_fops);
return 0;
del_cdev:
- cdev_del(device->cdev);
+ cdev_del(pi433->cdev);
cdev_failed:
- kthread_stop(device->tx_task_struct);
+ kthread_stop(pi433->tx_task_struct);
send_thread_failed:
- device_destroy(&pi433_class, device->devt);
+ device_destroy(&pi433_class, pi433->devt);
device_create_failed:
- pi433_free_minor(device);
+ pi433_free_minor(pi433);
minor_failed:
- free_gpio(device);
+ free_gpio(pi433);
GPIO_failed:
- kfree(device->rx_buffer);
+ kfree(pi433->rx_buffer);
RX_failed:
- kfree(device);
+ kfree(pi433);
return retval;
}
static void pi433_remove(struct spi_device *spi)
{
- struct pi433_device *device = spi_get_drvdata(spi);
+ struct pi433_device *pi433 = spi_get_drvdata(spi);
- debugfs_lookup_and_remove(dev_name(device->dev), root_dir);
+ debugfs_lookup_and_remove(dev_name(pi433->dev), root_dir);
/* free GPIOs */
- free_gpio(device);
+ free_gpio(pi433);
/* make sure ops on existing fds can abort cleanly */
- device->spi = NULL;
+ pi433->spi = NULL;
- kthread_stop(device->tx_task_struct);
+ kthread_stop(pi433->tx_task_struct);
- device_destroy(&pi433_class, device->devt);
+ device_destroy(&pi433_class, pi433->devt);
- cdev_del(device->cdev);
+ cdev_del(pi433->cdev);
- pi433_free_minor(device);
+ pi433_free_minor(pi433);
- kfree(device->rx_buffer);
- kfree(device);
+ kfree(pi433->rx_buffer);
+ kfree(pi433);
}
static const struct of_device_id pi433_dt_ids[] = {
projects / linux.git / commitdiff