This patch introduces a sysfs group entry for the UFS string descriptors.
The group adds "string_descriptors" folder under the UFS driver
sysfs entry (/sys/bus/platform/drivers/ufshcd/*). The folder will contain
5 files that will show string values defined by the UFS spec:
a manufacturer name, a product name, an OEM id, a serial number and a
product revision. The full information about the string descriptors
could be found at UFS specifications 2.1.
Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
power descriptor parameters. The full information about
the descriptor could be found at UFS specifications 2.1.
The file is read only.
+
+
+What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/manufacturer_name
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file contains a device manufactureer name string.
+ The full information about the descriptor could be found at
+ UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_name
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file contains a product name string. The full information
+ about the descriptor could be found at UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/oem_id
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file contains a OEM ID string. The full information
+ about the descriptor could be found at UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/serial_number
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file contains a device serial number string. The full
+ information about the descriptor could be found at
+ UFS specifications 2.1.
+ The file is read only.
+
+What: /sys/bus/platform/drivers/ufshcd/*/string_descriptors/product_revision
+Date: February 2018
+Contact: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
+Description: This file contains a product revision string. The full
+ information about the descriptor could be found at
+ UFS specifications 2.1.
+ The file is read only.
.attrs = ufs_sysfs_power_descriptor,
};
+#define UFS_STRING_DESCRIPTOR(_name, _pname) \
+static ssize_t _name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ u8 index; \
+ struct ufs_hba *hba = dev_get_drvdata(dev); \
+ int ret; \
+ int desc_len = QUERY_DESC_MAX_SIZE; \
+ u8 *desc_buf; \
+ desc_buf = kzalloc(QUERY_DESC_MAX_SIZE, GFP_ATOMIC); \
+ if (!desc_buf) \
+ return -ENOMEM; \
+ ret = ufshcd_query_descriptor_retry(hba, \
+ UPIU_QUERY_OPCODE_READ_DESC, QUERY_DESC_IDN_DEVICE, \
+ 0, 0, desc_buf, &desc_len); \
+ if (ret) { \
+ ret = -EINVAL; \
+ goto out; \
+ } \
+ index = desc_buf[DEVICE_DESC_PARAM##_pname]; \
+ memset(desc_buf, 0, QUERY_DESC_MAX_SIZE); \
+ if (ufshcd_read_string_desc(hba, index, desc_buf, \
+ QUERY_DESC_MAX_SIZE, true)) { \
+ ret = -EINVAL; \
+ goto out; \
+ } \
+ ret = snprintf(buf, PAGE_SIZE, "%s\n", \
+ desc_buf + QUERY_DESC_HDR_SIZE); \
+out: \
+ kfree(desc_buf); \
+ return ret; \
+} \
+static DEVICE_ATTR_RO(_name)
+
+UFS_STRING_DESCRIPTOR(manufacturer_name, _MANF_NAME);
+UFS_STRING_DESCRIPTOR(product_name, _PRDCT_NAME);
+UFS_STRING_DESCRIPTOR(oem_id, _OEM_ID);
+UFS_STRING_DESCRIPTOR(serial_number, _SN);
+UFS_STRING_DESCRIPTOR(product_revision, _PRDCT_REV);
+
+static struct attribute *ufs_sysfs_string_descriptors[] = {
+ &dev_attr_manufacturer_name.attr,
+ &dev_attr_product_name.attr,
+ &dev_attr_oem_id.attr,
+ &dev_attr_serial_number.attr,
+ &dev_attr_product_revision.attr,
+ NULL,
+};
+
+static const struct attribute_group ufs_sysfs_string_descriptors_group = {
+ .name = "string_descriptors",
+ .attrs = ufs_sysfs_string_descriptors,
+};
+
+
static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_default_group,
&ufs_sysfs_device_descriptor_group,
&ufs_sysfs_geometry_descriptor_group,
&ufs_sysfs_health_descriptor_group,
&ufs_sysfs_power_descriptor_group,
+ &ufs_sysfs_string_descriptors_group,
NULL,
};
* The buf_len parameter will contain, on return, the length parameter
* received on the response.
*/
-static int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
- enum query_opcode opcode,
- enum desc_idn idn, u8 index,
- u8 selector,
- u8 *desc_buf, int *buf_len)
+int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
+ enum query_opcode opcode,
+ enum desc_idn idn, u8 index,
+ u8 selector,
+ u8 *desc_buf, int *buf_len)
{
int err;
int retries;
* Return 0 in case of success, non-zero otherwise
*/
#define ASCII_STD true
-static int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index,
- u8 *buf, u32 size, bool ascii)
+int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index,
+ u8 *buf, u32 size, bool ascii)
{
int err = 0;
}
/* Expose Query-Request API */
+int ufshcd_query_descriptor_retry(struct ufs_hba *hba,
+ enum query_opcode opcode,
+ enum desc_idn idn, u8 index,
+ u8 selector,
+ u8 *desc_buf, int *buf_len);
+
int ufshcd_read_desc_param(struct ufs_hba *hba,
enum desc_idn desc_id,
int desc_index,
u8 param_size);
int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
enum flag_idn idn, bool *flag_res);
+int ufshcd_read_string_desc(struct ufs_hba *hba, int desc_index,
+ u8 *buf, u32 size, bool ascii);
+
int ufshcd_hold(struct ufs_hba *hba, bool async);
void ufshcd_release(struct ufs_hba *hba);
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