@@ -971,10 +971,14 @@ static int smiapp_update_mode(struct smiapp_sensor *sensor)
*
*/
-static int smiapp_read_nvm_page(struct smiapp_sensor *sensor, u32 p, u8 *nvm)
+static int smiapp_read_nvm_page(struct smiapp_sensor *sensor, u32 p, u8 *nvm,
+ u8 *status)
{
unsigned int i;
int rval;
+ u32 s;
+
+ *status = 0;
rval = smiapp_write(sensor,
SMIAPP_REG_U8_DATA_TRANSFER_IF_1_PAGE_SELECT, p);
@@ -986,10 +990,21 @@ static int smiapp_read_nvm_page(struct smiapp_sensor *sensor, u32 p, u8 *nvm)
if (rval)
return rval;
+ rval = smiapp_read(sensor, SMIAPP_REG_U8_DATA_TRANSFER_IF_1_STATUS,
+ &s);
+ if (rval)
+ return rval;
+
+ if (s & SMIAPP_DATA_TRANSFER_IF_1_STATUS_EUSAGE) {
+ *status = s;
+ return -ENODATA;
+ }
+
if (sensor->limits[SMIAPP_LIMIT_DATA_TRANSFER_IF_CAPABILITY] &
SMIAPP_DATA_TRANSFER_IF_CAPABILITY_POLL) {
for (i = 1000; i > 0; i--) {
- u32 s;
+ if (s & SMIAPP_DATA_TRANSFER_IF_1_STATUS_RD_READY)
+ break;
rval = smiapp_read(
sensor,
@@ -998,10 +1013,6 @@ static int smiapp_read_nvm_page(struct smiapp_sensor *sensor, u32 p, u8 *nvm)
if (rval)
return rval;
-
- if (s & SMIAPP_DATA_TRANSFER_IF_1_STATUS_RD_READY)
- break;
-
}
if (!i)
@@ -1023,23 +1034,27 @@ static int smiapp_read_nvm_page(struct smiapp_sensor *sensor, u32 p, u8 *nvm)
return 0;
}
-static int smiapp_read_nvm(struct smiapp_sensor *sensor,
- unsigned char *nvm)
+static int smiapp_read_nvm(struct smiapp_sensor *sensor, unsigned char *nvm,
+ size_t nvm_size)
{
- u32 p, np;
+ u8 status = 0;
+ u32 p;
int rval = 0, rval2;
- np = sensor->nvm_size / SMIAPP_NVM_PAGE_SIZE;
- for (p = 0; p < np && !rval; p++) {
- rval = smiapp_read_nvm_page(sensor, p, nvm);
+ for (p = 0; p < nvm_size / SMIAPP_NVM_PAGE_SIZE && !rval; p++) {
+ rval = smiapp_read_nvm_page(sensor, p, nvm, &status);
nvm += SMIAPP_NVM_PAGE_SIZE;
}
+ if (rval == -ENODATA &&
+ status & SMIAPP_DATA_TRANSFER_IF_1_STATUS_EUSAGE)
+ rval = 0;
+
rval2 = smiapp_write(sensor, SMIAPP_REG_U8_DATA_TRANSFER_IF_1_CTRL, 0);
if (rval < 0)
return rval;
else
- return rval2;
+ return rval2 ?: p * SMIAPP_NVM_PAGE_SIZE;
}
/*
@@ -2326,42 +2341,34 @@ smiapp_sysfs_nvm_read(struct device *dev, struct device_attribute *attr,
struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev));
struct i2c_client *client = v4l2_get_subdevdata(subdev);
struct smiapp_sensor *sensor = to_smiapp_sensor(subdev);
- unsigned int nbytes;
+ int rval;
if (!sensor->dev_init_done)
return -EBUSY;
- if (!sensor->nvm_size) {
- int rval;
-
- /* NVM not read yet - read it now */
- sensor->nvm_size = sensor->hwcfg->nvm_size;
+ rval = pm_runtime_get_sync(&client->dev);
+ if (rval < 0) {
+ if (rval != -EBUSY && rval != -EAGAIN)
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+ return -ENODEV;
+ }
- rval = pm_runtime_get_sync(&client->dev);
- if (rval < 0) {
- if (rval != -EBUSY && rval != -EAGAIN)
- pm_runtime_set_active(&client->dev);
- pm_runtime_put_noidle(&client->dev);
- return -ENODEV;
- }
+ rval = smiapp_read_nvm(sensor, buf, PAGE_SIZE);
+ if (rval < 0) {
+ pm_runtime_put(&client->dev);
+ dev_err(&client->dev, "nvm read failed\n");
+ return -ENODEV;
+ }
- if (smiapp_read_nvm(sensor, sensor->nvm)) {
- pm_runtime_put(&client->dev);
- dev_err(&client->dev, "nvm read failed\n");
- return -ENODEV;
- }
+ pm_runtime_mark_last_busy(&client->dev);
+ pm_runtime_put_autosuspend(&client->dev);
- pm_runtime_mark_last_busy(&client->dev);
- pm_runtime_put_autosuspend(&client->dev);
- }
/*
* NVM is still way below a PAGE_SIZE, so we can safely
* assume this for now.
*/
- nbytes = min_t(unsigned int, sensor->nvm_size, PAGE_SIZE);
- memcpy(buf, sensor->nvm, nbytes);
-
- return nbytes;
+ return rval;
}
static DEVICE_ATTR(nvm, S_IRUGO, smiapp_sysfs_nvm_read, NULL);
@@ -2825,16 +2832,13 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev)
}
}
- /* NVM size is not mandatory */
- fwnode_property_read_u32(fwnode, "nokia,nvm-size", &hwcfg->nvm_size);
-
rval = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
&hwcfg->ext_clk);
if (rval)
dev_info(dev, "can't get clock-frequency\n");
- dev_dbg(dev, "nvm %d, clk %d, mode %d\n",
- hwcfg->nvm_size, hwcfg->ext_clk, hwcfg->csi_signalling_mode);
+ dev_dbg(dev, "clk %d, mode %d\n", hwcfg->ext_clk,
+ hwcfg->csi_signalling_mode);
if (!bus_cfg.nr_of_link_frequencies) {
dev_warn(dev, "no link frequencies defined\n");
@@ -3018,17 +3022,10 @@ static int smiapp_probe(struct i2c_client *client)
rval = -ENOENT;
goto out_power_off;
}
- /* SMIA++ NVM initialization - it will be read from the sensor
- * when it is first requested by userspace.
- */
- if (sensor->minfo.smiapp_version && sensor->hwcfg->nvm_size) {
- sensor->nvm = devm_kzalloc(&client->dev,
- sensor->hwcfg->nvm_size, GFP_KERNEL);
- if (sensor->nvm == NULL) {
- rval = -ENOMEM;
- goto out_cleanup;
- }
+ if (sensor->minfo.smiapp_version &&
+ sensor->limits[SMIAPP_LIMIT_DATA_TRANSFER_IF_CAPABILITY] &
+ SMIAPP_DATA_TRANSFER_IF_CAPABILITY_SUPPORTED) {
if (device_create_file(&client->dev, &dev_attr_nvm) != 0) {
dev_err(&client->dev, "sysfs nvm entry failed\n");
rval = -EBUSY;
@@ -208,9 +208,6 @@ struct smiapp_sensor {
bool dev_init_done;
u8 compressed_min_bpp;
- u8 *nvm; /* nvm memory buffer */
- unsigned int nvm_size; /* bytes */
-
struct smiapp_module_info minfo;
struct smiapp_pll pll;
@@ -49,7 +49,6 @@ struct smiapp_hwconfig {
unsigned short i2c_addr_dfl; /* Default i2c addr */
unsigned short i2c_addr_alt; /* Alternate i2c addr */
- uint32_t nvm_size; /* bytes */
uint32_t ext_clk; /* sensor external clk */
unsigned int lanes; /* Number of CSI-2 lanes */
The interface supports probing for the NVM size but this was not implemented in the driver. Do that now. This will also make nokia,nvm-size property redundant. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> --- drivers/media/i2c/smiapp/smiapp-core.c | 103 ++++++++++++------------- drivers/media/i2c/smiapp/smiapp.h | 3 - include/media/i2c/smiapp.h | 1 - 3 files changed, 50 insertions(+), 57 deletions(-)