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Message-Id: <1494282355-1926-1-git-send-email-mark@markrailton.com>
Date: Mon, 8 May 2017 23:25:55 +0100
From: Mark Railton <mark@...krailton.com>
To: mchehab@...nel.org
Cc: gregkh@...uxfoundation.org, linux-media@...r.kernel.org,
devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
Mark Railton <mark@...krailton.com>
Subject: [PATCH] ATOMISP: Tidies up code warnings and errors in file
Cleared up some errors and warnings in
drivers/staging/media/atomisp/i2c/ap1302.c
Signed-off-by: Mark Railton <mark@...krailton.com>
---
drivers/staging/media/atomisp/i2c/ap1302.c | 83 ++++++++++++++++++------------
1 file changed, 50 insertions(+), 33 deletions(-)
diff --git a/drivers/staging/media/atomisp/i2c/ap1302.c b/drivers/staging/media/atomisp/i2c/ap1302.c
index bacffbe..8c33a35 100644
--- a/drivers/staging/media/atomisp/i2c/ap1302.c
+++ b/drivers/staging/media/atomisp/i2c/ap1302.c
@@ -11,11 +11,6 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
*/
#include "../include/linux/atomisp.h"
@@ -162,9 +157,11 @@ static struct ap1302_context_info context_info[] = {
{CNTX_HINF_CTRL, AP1302_REG16, "hinf_ctrl"},
};
-/* This array stores the description list for metadata.
- The metadata contains exposure settings and face
- detection results. */
+/*
+ * This array stores the description list for metadata.
+ * The metadata contains exposure settings and face
+ * detection results.
+ */
static u16 ap1302_ss_list[] = {
0xb01c, /* From 0x0186 with size 0x1C are exposure settings. */
0x0186,
@@ -213,6 +210,7 @@ static int ap1302_i2c_write_reg(struct v4l2_subdev *sd,
struct ap1302_device *dev = to_ap1302_device(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
+
if (len == AP1302_REG16)
ret = regmap_write(dev->regmap16, reg, val);
else if (len == AP1302_REG32)
@@ -236,11 +234,13 @@ static u16
ap1302_calculate_context_reg_addr(enum ap1302_contexts context, u16 offset)
{
u16 reg_addr;
- /* The register offset is defined according to preview/video registers.
- Preview and video context have the same register definition.
- But snapshot context does not have register S1_SENSOR_MODE.
- When setting snapshot registers, if the offset exceeds
- S1_SENSOR_MODE, the actual offset needs to minus 2. */
+ /*
+ * The register offset is defined according to preview/video registers.
+ * Preview and video context have the same register definition.
+ * But snapshot context does not have register S1_SENSOR_MODE.
+ * When setting snapshot registers, if the offset exceeds
+ * S1_SENSOR_MODE, the actual offset needs to minus 2.
+ */
if (context == CONTEXT_SNAPSHOT) {
if (offset == CNTX_S1_SENSOR_MODE)
return 0;
@@ -261,6 +261,7 @@ static int ap1302_read_context_reg(struct v4l2_subdev *sd,
{
struct ap1302_device *dev = to_ap1302_device(sd);
u16 reg_addr = ap1302_calculate_context_reg_addr(context, offset);
+
if (reg_addr == 0)
return -EINVAL;
return ap1302_i2c_read_reg(sd, reg_addr, len,
@@ -272,6 +273,7 @@ static int ap1302_write_context_reg(struct v4l2_subdev *sd,
{
struct ap1302_device *dev = to_ap1302_device(sd);
u16 reg_addr = ap1302_calculate_context_reg_addr(context, offset);
+
if (reg_addr == 0)
return -EINVAL;
return ap1302_i2c_write_reg(sd, reg_addr, len,
@@ -284,7 +286,9 @@ static int ap1302_dump_context_reg(struct v4l2_subdev *sd,
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ap1302_device *dev = to_ap1302_device(sd);
int i;
+
dev_dbg(&client->dev, "Dump registers for context[%d]:\n", context);
+
for (i = 0; i < ARRAY_SIZE(context_info); i++) {
struct ap1302_context_info *info = &context_info[i];
u8 *var = (u8 *)&dev->cntx_config[context] + info->offset;
@@ -308,6 +312,7 @@ static int ap1302_request_firmware(struct v4l2_subdev *sd)
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ap1302_device *dev = to_ap1302_device(sd);
int ret;
+
ret = request_firmware(&dev->fw, "ap1302_fw.bin", &client->dev);
if (ret)
dev_err(&client->dev,
@@ -315,12 +320,14 @@ static int ap1302_request_firmware(struct v4l2_subdev *sd)
return ret;
}
-/* When loading firmware, host writes firmware data from address 0x8000.
- When the address reaches 0x9FFF, the next address should return to 0x8000.
- This function handles this address window and load firmware data to AP1302.
- win_pos indicates the offset within this window. Firmware loading procedure
- may call this function several times. win_pos records the current position
- that has been written to.*/
+/*
+ * When loading firmware, host writes firmware data from address 0x8000.
+ * When the address reaches 0x9FFF, the next address should return to 0x8000.
+ * This function handles this address window and load firmware data to AP1302.
+ * win_pos indicates the offset within this window. Firmware loading procedure
+ * may call this function several times. win_pos records the current position
+ * that has been written to.
+ */
static int ap1302_write_fw_window(struct v4l2_subdev *sd,
u16 *win_pos, const u8 *buf, u32 len)
{
@@ -328,6 +335,7 @@ static int ap1302_write_fw_window(struct v4l2_subdev *sd,
int ret;
u32 pos;
u32 sub_len;
+
for (pos = 0; pos < len; pos += sub_len) {
if (len - pos < AP1302_FW_WINDOW_SIZE - *win_pos)
sub_len = len - pos;
@@ -365,9 +373,11 @@ static int ap1302_load_firmware(struct v4l2_subdev *sd)
dev_err(&client->dev, "firmware size does not match.\n");
return -EINVAL;
}
- /* The fw binary contains a header of struct ap1302_firmware.
- Following the header is the bootdata of AP1302.
- The bootdata pointer can be referenced as &fw[1]. */
+ /*
+ * The fw binary contains a header of struct ap1302_firmware.
+ * Following the header is the bootdata of AP1302.
+ * The bootdata pointer can be referenced as &fw[1].
+ */
fw_data = (u8 *)&fw[1];
/* Clear crc register. */
@@ -380,8 +390,10 @@ static int ap1302_load_firmware(struct v4l2_subdev *sd)
if (ret)
return ret;
- /* Write 2 to bootdata_stage register to apply basic_init_hp
- settings and enable PLL. */
+ /*
+ * Write 2 to bootdata_stage register to apply basic_init_hp
+ * settings and enable PLL.
+ */
ret = ap1302_i2c_write_reg(sd, REG_BOOTDATA_STAGE,
AP1302_REG16, 0x0002);
if (ret)
@@ -407,8 +419,10 @@ static int ap1302_load_firmware(struct v4l2_subdev *sd)
return -EAGAIN;
}
- /* Write 0xFFFF to bootdata_stage register to indicate AP1302 that
- the whole bootdata content has been loaded. */
+ /*
+ * Write 0xFFFF to bootdata_stage register to indicate AP1302 that
+ * the whole bootdata content has been loaded.
+ */
ret = ap1302_i2c_write_reg(sd, REG_BOOTDATA_STAGE,
AP1302_REG16, 0xFFFF);
if (ret)
@@ -536,6 +550,7 @@ static int ap1302_s_config(struct v4l2_subdev *sd, void *pdata)
static enum ap1302_contexts ap1302_get_context(struct v4l2_subdev *sd)
{
struct ap1302_device *dev = to_ap1302_device(sd);
+
return dev->cur_context;
}
@@ -606,16 +621,16 @@ static s32 ap1302_try_mbus_fmt_locked(struct v4l2_subdev *sd,
static int ap1302_get_fmt(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
{
- struct v4l2_mbus_framefmt *fmt = &format->format;
- struct ap1302_device *dev = to_ap1302_device(sd);
- enum ap1302_contexts context;
- struct ap1302_res_struct *res_table;
- s32 cur_res;
- if (format->pad)
+ struct v4l2_mbus_framefmt *fmt = &format->format;
+ struct ap1302_device *dev = to_ap1302_device(sd);
+ enum ap1302_contexts context;
+ struct ap1302_res_struct *res_table;
+ s32 cur_res;
+ if (format->pad)
return -EINVAL;
mutex_lock(&dev->input_lock);
context = ap1302_get_context(sd);
@@ -638,6 +653,7 @@ static int ap1302_set_fmt(struct v4l2_subdev *sd,
struct atomisp_input_stream_info *stream_info =
(struct atomisp_input_stream_info *)fmt->reserved;
enum ap1302_contexts context, main_context;
+
if (format->pad)
return -EINVAL;
if (!fmt)
@@ -1000,6 +1016,7 @@ static int ap1302_s_register(struct v4l2_subdev *sd,
static long ap1302_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
long ret = 0;
+
switch (cmd) {
case VIDIOC_DBG_G_REGISTER:
ret = ap1302_g_register(sd, arg);
--
2.7.4
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