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Input: iqs5xx - expose firmware revision to user space

Browse source 
Add the read-only 'fw_info' attribute which reports information
about the device's firmware in the following format:

a.b.c.d:e.f

Where:

a = Product number (e.g. 40 for IQS550)
b = Project number (e.g. 15)
c = Firmware revision (major)
d = Firmware revision (minor)
e = Customer-assigned exported file version (major)
f = Customer-assigned exported file version (minor)

As part of the corresponding rework to uses of 'bl_status', the
IQS5XX_BL_STATUS_RESET definition is dropped with 0 used in its
place instead.

Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/20210313191236.4366-4-jeff@labundy.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Jeff LaBundy 2021-03-21 21:02:11 -07:00 committed by Dmitry Torokhov
parent 40c3efdc0b
commit 509c008313
1 changed files with 40 additions and 16 deletions
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56
drivers/input/touchscreen/iqs5xx.c
View file

@ -63,6 +63,7 @@
#define IQS5XX_SYS_CFG1 0x058F
#define IQS5XX_X_RES 0x066E
#define IQS5XX_Y_RES 0x0670
#define IQS5XX_EXP_FILE 0x0677
#define IQS5XX_CHKSM 0x83C0
#define IQS5XX_APP 0x8400
#define IQS5XX_CSTM 0xBE00
@ -86,22 +87,12 @@
#define IQS5XX_BL_CMD_CRC 0x03
#define IQS5XX_BL_BLK_LEN_MAX 64
#define IQS5XX_BL_ID 0x0200
#define IQS5XX_BL_STATUS_RESET 0x00
#define IQS5XX_BL_STATUS_AVAIL 0xA5
#define IQS5XX_BL_STATUS_NONE 0xEE
#define IQS5XX_BL_CRC_PASS 0x00
#define IQS5XX_BL_CRC_FAIL 0x01
#define IQS5XX_BL_ATTEMPTS 3
struct iqs5xx_private {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *reset_gpio;
struct touchscreen_properties prop;
struct mutex lock;
u8 bl_status;
};
struct iqs5xx_dev_id_info {
__be16 prod_num;
__be16 proj_num;
@ -133,6 +124,16 @@ struct iqs5xx_status {
struct iqs5xx_touch_data touch_data[IQS5XX_NUM_CONTACTS];
} __packed;
struct iqs5xx_private {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *reset_gpio;
struct touchscreen_properties prop;
struct mutex lock;
struct iqs5xx_dev_id_info dev_id_info;
u8 exp_file[2];
};
static int iqs5xx_read_burst(struct i2c_client *client,
u16 reg, void *val, u16 len)
{
@ -445,7 +446,7 @@ static int iqs5xx_set_state(struct i2c_client *client, u8 state)
struct iqs5xx_private *iqs5xx = i2c_get_clientdata(client);
int error1, error2;
if (iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
if (!iqs5xx->dev_id_info.bl_status)
return 0;
mutex_lock(&iqs5xx->lock);
@ -615,6 +616,11 @@ static int iqs5xx_dev_init(struct i2c_client *client)
return -EINVAL;
}
error = iqs5xx_read_burst(client, IQS5XX_EXP_FILE,
iqs5xx->exp_file, sizeof(iqs5xx->exp_file));
if (error)
return error;
error = iqs5xx_axis_init(client);
if (error)
return error;
@ -638,7 +644,7 @@ static int iqs5xx_dev_init(struct i2c_client *client)
if (error)
return error;
iqs5xx->bl_status = dev_id_info->bl_status;
iqs5xx->dev_id_info = *dev_id_info;
/*
* The following delay allows ATI to complete before the open and close
@ -664,7 +670,7 @@ static irqreturn_t iqs5xx_irq(int irq, void *data)
* RDY output during bootloader mode. If the device operates outside of
* bootloader mode, the input device is guaranteed to be allocated.
*/
if (iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
if (!iqs5xx->dev_id_info.bl_status)
return IRQ_NONE;
error = iqs5xx_read_burst(client, IQS5XX_SYS_INFO0,
@ -853,7 +859,7 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
int error, error_bl = 0;
u8 *pmap;
if (iqs5xx->bl_status == IQS5XX_BL_STATUS_NONE)
if (iqs5xx->dev_id_info.bl_status == IQS5XX_BL_STATUS_NONE)
return -EPERM;
pmap = kzalloc(IQS5XX_PMAP_LEN, GFP_KERNEL);
@ -873,7 +879,7 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
*/
disable_irq(client->irq);
iqs5xx->bl_status = IQS5XX_BL_STATUS_RESET;
iqs5xx->dev_id_info.bl_status = 0;
error = iqs5xx_bl_cmd(client, IQS5XX_BL_CMD_VER, 0);
if (error) {
@ -906,7 +912,7 @@ static int iqs5xx_fw_file_write(struct i2c_client *client, const char *fw_file)
error_bl = error;
error = iqs5xx_dev_init(client);
if (!error && iqs5xx->bl_status == IQS5XX_BL_STATUS_RESET)
if (!error && !iqs5xx->dev_id_info.bl_status)
error = -EINVAL;
enable_irq(client->irq);
@ -966,10 +972,28 @@ static ssize_t fw_file_store(struct device *dev,
return count;
}
static ssize_t fw_info_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
if (!iqs5xx->dev_id_info.bl_status)
return -ENODATA;
return scnprintf(buf, PAGE_SIZE, "%u.%u.%u.%u:%u.%u\n",
be16_to_cpu(iqs5xx->dev_id_info.prod_num),
be16_to_cpu(iqs5xx->dev_id_info.proj_num),
iqs5xx->dev_id_info.major_ver,
iqs5xx->dev_id_info.minor_ver,
iqs5xx->exp_file[0], iqs5xx->exp_file[1]);
}
static DEVICE_ATTR_WO(fw_file);
static DEVICE_ATTR_RO(fw_info);
static struct attribute *iqs5xx_attrs[] = {
&dev_attr_fw_file.attr,
&dev_attr_fw_info.attr,
NULL,
};