[PATCH -next v4 2/3] media: ov772x: use SCCB regmap
From: Akinobu Mita
Date: Mon Jul 16 2018 - 11:48:21 EST
Convert ov772x register access to use SCCB regmap.
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: Peter Rosin <peda@xxxxxxxxxx>
Cc: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Cc: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Cc: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
---
drivers/media/i2c/Kconfig | 1 +
drivers/media/i2c/ov772x.c | 192 +++++++++++++++++++--------------------------
2 files changed, 82 insertions(+), 111 deletions(-)
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 341452f..b923a51 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -715,6 +715,7 @@ config VIDEO_OV772X
tristate "OmniVision OV772x sensor support"
depends on I2C && VIDEO_V4L2
depends on MEDIA_CAMERA_SUPPORT
+ select REGMAP_SCCB
---help---
This is a Video4Linux2 sensor-level driver for the OmniVision
OV772x camera.
diff --git a/drivers/media/i2c/ov772x.c b/drivers/media/i2c/ov772x.c
index 7158c31..0d3ed23 100644
--- a/drivers/media/i2c/ov772x.c
+++ b/drivers/media/i2c/ov772x.c
@@ -21,6 +21,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>
@@ -414,6 +415,7 @@ struct ov772x_priv {
struct v4l2_subdev subdev;
struct v4l2_ctrl_handler hdl;
struct clk *clk;
+ struct regmap *regmap;
struct ov772x_camera_info *info;
struct gpio_desc *pwdn_gpio;
struct gpio_desc *rstb_gpio;
@@ -549,51 +551,18 @@ static struct ov772x_priv *to_ov772x(struct v4l2_subdev *sd)
return container_of(sd, struct ov772x_priv, subdev);
}
-static int ov772x_read(struct i2c_client *client, u8 addr)
-{
- int ret;
- u8 val;
-
- ret = i2c_master_send(client, &addr, 1);
- if (ret < 0)
- return ret;
- ret = i2c_master_recv(client, &val, 1);
- if (ret < 0)
- return ret;
-
- return val;
-}
-
-static inline int ov772x_write(struct i2c_client *client, u8 addr, u8 value)
-{
- return i2c_smbus_write_byte_data(client, addr, value);
-}
-
-static int ov772x_mask_set(struct i2c_client *client, u8 command, u8 mask,
- u8 set)
-{
- s32 val = ov772x_read(client, command);
-
- if (val < 0)
- return val;
-
- val &= ~mask;
- val |= set & mask;
-
- return ov772x_write(client, command, val);
-}
-
-static int ov772x_reset(struct i2c_client *client)
+static int ov772x_reset(struct ov772x_priv *priv)
{
int ret;
- ret = ov772x_write(client, COM7, SCCB_RESET);
+ ret = regmap_write(priv->regmap, COM7, SCCB_RESET);
if (ret < 0)
return ret;
usleep_range(1000, 5000);
- return ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, SOFT_SLEEP_MODE);
+ return regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
+ SOFT_SLEEP_MODE);
}
/*
@@ -611,8 +580,8 @@ static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
if (priv->streaming == enable)
goto done;
- ret = ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE,
- enable ? 0 : SOFT_SLEEP_MODE);
+ ret = regmap_update_bits(priv->regmap, COM2, SOFT_SLEEP_MODE,
+ enable ? 0 : SOFT_SLEEP_MODE);
if (ret)
goto done;
@@ -657,7 +626,6 @@ static int ov772x_set_frame_rate(struct ov772x_priv *priv,
const struct ov772x_color_format *cfmt,
const struct ov772x_win_size *win)
{
- struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
unsigned long fin = clk_get_rate(priv->clk);
unsigned int best_diff;
unsigned int fsize;
@@ -723,11 +691,11 @@ static int ov772x_set_frame_rate(struct ov772x_priv *priv,
}
}
- ret = ov772x_write(client, COM4, com4 | COM4_RESERVED);
+ ret = regmap_write(priv->regmap, COM4, com4 | COM4_RESERVED);
if (ret < 0)
return ret;
- ret = ov772x_write(client, CLKRC, clkrc | CLKRC_RESERVED);
+ ret = regmap_write(priv->regmap, CLKRC, clkrc | CLKRC_RESERVED);
if (ret < 0)
return ret;
@@ -788,8 +756,7 @@ static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov772x_priv *priv = container_of(ctrl->handler,
struct ov772x_priv, hdl);
- struct v4l2_subdev *sd = &priv->subdev;
- struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct regmap *regmap = priv->regmap;
int ret = 0;
u8 val;
@@ -808,27 +775,27 @@ static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
val = ctrl->val ? VFLIP_IMG : 0x00;
if (priv->info && (priv->info->flags & OV772X_FLAG_VFLIP))
val ^= VFLIP_IMG;
- return ov772x_mask_set(client, COM3, VFLIP_IMG, val);
+ return regmap_update_bits(regmap, COM3, VFLIP_IMG, val);
case V4L2_CID_HFLIP:
val = ctrl->val ? HFLIP_IMG : 0x00;
if (priv->info && (priv->info->flags & OV772X_FLAG_HFLIP))
val ^= HFLIP_IMG;
- return ov772x_mask_set(client, COM3, HFLIP_IMG, val);
+ return regmap_update_bits(regmap, COM3, HFLIP_IMG, val);
case V4L2_CID_BAND_STOP_FILTER:
if (!ctrl->val) {
/* Switch the filter off, it is on now */
- ret = ov772x_mask_set(client, BDBASE, 0xff, 0xff);
+ ret = regmap_update_bits(regmap, BDBASE, 0xff, 0xff);
if (!ret)
- ret = ov772x_mask_set(client, COM8,
- BNDF_ON_OFF, 0);
+ ret = regmap_update_bits(regmap, COM8,
+ BNDF_ON_OFF, 0);
} else {
/* Switch the filter on, set AEC low limit */
val = 256 - ctrl->val;
- ret = ov772x_mask_set(client, COM8,
- BNDF_ON_OFF, BNDF_ON_OFF);
+ ret = regmap_update_bits(regmap, COM8,
+ BNDF_ON_OFF, BNDF_ON_OFF);
if (!ret)
- ret = ov772x_mask_set(client, BDBASE,
- 0xff, val);
+ ret = regmap_update_bits(regmap, BDBASE,
+ 0xff, val);
}
return ret;
@@ -841,18 +808,19 @@ static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
static int ov772x_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov772x_priv *priv = to_ov772x(sd);
int ret;
+ unsigned int val;
reg->size = 1;
if (reg->reg > 0xff)
return -EINVAL;
- ret = ov772x_read(client, reg->reg);
+ ret = regmap_read(priv->regmap, reg->reg, &val);
if (ret < 0)
return ret;
- reg->val = (__u64)ret;
+ reg->val = (__u64)val;
return 0;
}
@@ -860,13 +828,13 @@ static int ov772x_g_register(struct v4l2_subdev *sd,
static int ov772x_s_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct ov772x_priv *priv = to_ov772x(sd);
if (reg->reg > 0xff ||
reg->val > 0xff)
return -EINVAL;
- return ov772x_write(client, reg->reg, reg->val);
+ return regmap_write(priv->regmap, reg->reg, reg->val);
}
#endif
@@ -1004,7 +972,7 @@ static void ov772x_select_params(const struct v4l2_mbus_framefmt *mf,
static int ov772x_edgectrl(struct ov772x_priv *priv)
{
- struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
+ struct regmap *regmap = priv->regmap;
int ret;
if (!priv->info)
@@ -1018,19 +986,19 @@ static int ov772x_edgectrl(struct ov772x_priv *priv)
* Remove it when manual mode.
*/
- ret = ov772x_mask_set(client, DSPAUTO, EDGE_ACTRL, 0x00);
+ ret = regmap_update_bits(regmap, DSPAUTO, EDGE_ACTRL, 0x00);
if (ret < 0)
return ret;
- ret = ov772x_mask_set(client,
- EDGE_TRSHLD, OV772X_EDGE_THRESHOLD_MASK,
- priv->info->edgectrl.threshold);
+ ret = regmap_update_bits(regmap, EDGE_TRSHLD,
+ OV772X_EDGE_THRESHOLD_MASK,
+ priv->info->edgectrl.threshold);
if (ret < 0)
return ret;
- ret = ov772x_mask_set(client,
- EDGE_STRNGT, OV772X_EDGE_STRENGTH_MASK,
- priv->info->edgectrl.strength);
+ ret = regmap_update_bits(regmap, EDGE_STRNGT,
+ OV772X_EDGE_STRENGTH_MASK,
+ priv->info->edgectrl.strength);
if (ret < 0)
return ret;
@@ -1040,15 +1008,15 @@ static int ov772x_edgectrl(struct ov772x_priv *priv)
*
* Set upper and lower limit.
*/
- ret = ov772x_mask_set(client,
- EDGE_UPPER, OV772X_EDGE_UPPER_MASK,
- priv->info->edgectrl.upper);
+ ret = regmap_update_bits(regmap, EDGE_UPPER,
+ OV772X_EDGE_UPPER_MASK,
+ priv->info->edgectrl.upper);
if (ret < 0)
return ret;
- ret = ov772x_mask_set(client,
- EDGE_LOWER, OV772X_EDGE_LOWER_MASK,
- priv->info->edgectrl.lower);
+ ret = regmap_update_bits(regmap, EDGE_LOWER,
+ OV772X_EDGE_LOWER_MASK,
+ priv->info->edgectrl.lower);
if (ret < 0)
return ret;
}
@@ -1060,12 +1028,11 @@ static int ov772x_set_params(struct ov772x_priv *priv,
const struct ov772x_color_format *cfmt,
const struct ov772x_win_size *win)
{
- struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
int ret;
u8 val;
/* Reset hardware. */
- ov772x_reset(client);
+ ov772x_reset(priv);
/* Edge Ctrl. */
ret = ov772x_edgectrl(priv);
@@ -1073,32 +1040,32 @@ static int ov772x_set_params(struct ov772x_priv *priv,
return ret;
/* Format and window size. */
- ret = ov772x_write(client, HSTART, win->rect.left >> 2);
+ ret = regmap_write(priv->regmap, HSTART, win->rect.left >> 2);
if (ret < 0)
goto ov772x_set_fmt_error;
- ret = ov772x_write(client, HSIZE, win->rect.width >> 2);
+ ret = regmap_write(priv->regmap, HSIZE, win->rect.width >> 2);
if (ret < 0)
goto ov772x_set_fmt_error;
- ret = ov772x_write(client, VSTART, win->rect.top >> 1);
+ ret = regmap_write(priv->regmap, VSTART, win->rect.top >> 1);
if (ret < 0)
goto ov772x_set_fmt_error;
- ret = ov772x_write(client, VSIZE, win->rect.height >> 1);
+ ret = regmap_write(priv->regmap, VSIZE, win->rect.height >> 1);
if (ret < 0)
goto ov772x_set_fmt_error;
- ret = ov772x_write(client, HOUTSIZE, win->rect.width >> 2);
+ ret = regmap_write(priv->regmap, HOUTSIZE, win->rect.width >> 2);
if (ret < 0)
goto ov772x_set_fmt_error;
- ret = ov772x_write(client, VOUTSIZE, win->rect.height >> 1);
+ ret = regmap_write(priv->regmap, VOUTSIZE, win->rect.height >> 1);
if (ret < 0)
goto ov772x_set_fmt_error;
- ret = ov772x_write(client, HREF,
+ ret = regmap_write(priv->regmap, HREF,
((win->rect.top & 1) << HREF_VSTART_SHIFT) |
((win->rect.left & 3) << HREF_HSTART_SHIFT) |
((win->rect.height & 1) << HREF_VSIZE_SHIFT) |
((win->rect.width & 3) << HREF_HSIZE_SHIFT));
if (ret < 0)
goto ov772x_set_fmt_error;
- ret = ov772x_write(client, EXHCH,
+ ret = regmap_write(priv->regmap, EXHCH,
((win->rect.height & 1) << EXHCH_VSIZE_SHIFT) |
((win->rect.width & 3) << EXHCH_HSIZE_SHIFT));
if (ret < 0)
@@ -1107,15 +1074,14 @@ static int ov772x_set_params(struct ov772x_priv *priv,
/* Set DSP_CTRL3. */
val = cfmt->dsp3;
if (val) {
- ret = ov772x_mask_set(client,
- DSP_CTRL3, UV_MASK, val);
+ ret = regmap_update_bits(priv->regmap, DSP_CTRL3, UV_MASK, val);
if (ret < 0)
goto ov772x_set_fmt_error;
}
/* DSP_CTRL4: AEC reference point and DSP output format. */
if (cfmt->dsp4) {
- ret = ov772x_write(client, DSP_CTRL4, cfmt->dsp4);
+ ret = regmap_write(priv->regmap, DSP_CTRL4, cfmt->dsp4);
if (ret < 0)
goto ov772x_set_fmt_error;
}
@@ -1131,13 +1097,12 @@ static int ov772x_set_params(struct ov772x_priv *priv,
if (priv->hflip_ctrl->val)
val ^= HFLIP_IMG;
- ret = ov772x_mask_set(client,
- COM3, SWAP_MASK | IMG_MASK, val);
+ ret = regmap_update_bits(priv->regmap, COM3, SWAP_MASK | IMG_MASK, val);
if (ret < 0)
goto ov772x_set_fmt_error;
/* COM7: Sensor resolution and output format control. */
- ret = ov772x_write(client, COM7, win->com7_bit | cfmt->com7);
+ ret = regmap_write(priv->regmap, COM7, win->com7_bit | cfmt->com7);
if (ret < 0)
goto ov772x_set_fmt_error;
@@ -1150,10 +1115,11 @@ static int ov772x_set_params(struct ov772x_priv *priv,
if (priv->band_filter_ctrl->val) {
unsigned short band_filter = priv->band_filter_ctrl->val;
- ret = ov772x_mask_set(client, COM8, BNDF_ON_OFF, BNDF_ON_OFF);
+ ret = regmap_update_bits(priv->regmap, COM8,
+ BNDF_ON_OFF, BNDF_ON_OFF);
if (!ret)
- ret = ov772x_mask_set(client, BDBASE,
- 0xff, 256 - band_filter);
+ ret = regmap_update_bits(priv->regmap, BDBASE,
+ 0xff, 256 - band_filter);
if (ret < 0)
goto ov772x_set_fmt_error;
}
@@ -1162,7 +1128,7 @@ static int ov772x_set_params(struct ov772x_priv *priv,
ov772x_set_fmt_error:
- ov772x_reset(client);
+ ov772x_reset(priv);
return ret;
}
@@ -1276,12 +1242,12 @@ static int ov772x_video_probe(struct ov772x_priv *priv)
return ret;
/* Check and show product ID and manufacturer ID. */
- pid = ov772x_read(client, PID);
- if (pid < 0)
- return pid;
- ver = ov772x_read(client, VER);
- if (ver < 0)
- return ver;
+ ret = regmap_read(priv->regmap, PID, &pid);
+ if (ret < 0)
+ return ret;
+ ret = regmap_read(priv->regmap, VER, &ver);
+ if (ret < 0)
+ return ret;
switch (VERSION(pid, ver)) {
case OV7720:
@@ -1297,12 +1263,12 @@ static int ov772x_video_probe(struct ov772x_priv *priv)
goto done;
}
- midh = ov772x_read(client, MIDH);
- if (midh < 0)
- return midh;
- midl = ov772x_read(client, MIDL);
- if (midl < 0)
- return midl;
+ ret = regmap_read(priv->regmap, MIDH, &midh);
+ if (ret < 0)
+ return ret;
+ ret = regmap_read(priv->regmap, MIDL, &midl);
+ if (ret < 0)
+ return ret;
dev_info(&client->dev,
"%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
@@ -1386,8 +1352,12 @@ static int ov772x_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct ov772x_priv *priv;
- struct i2c_adapter *adapter = client->adapter;
int ret;
+ static const struct regmap_config ov772x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = DSPAUTO,
+ };
if (!client->dev.of_node && !client->dev.platform_data) {
dev_err(&client->dev,
@@ -1395,16 +1365,16 @@ static int ov772x_probe(struct i2c_client *client,
return -EINVAL;
}
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
- dev_err(&adapter->dev,
- "I2C-Adapter doesn't support SMBUS_BYTE_DATA\n");
- return -EIO;
- }
-
priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
+ priv->regmap = devm_regmap_init_sccb(client, &ov772x_regmap_config);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(&client->dev, "Failed to allocate register map\n");
+ return PTR_ERR(priv->regmap);
+ }
+
priv->info = client->dev.platform_data;
mutex_init(&priv->lock);
--
2.7.4