This patch converts Toshiba TCM825X VGA camera sersor driver to V4L2 sub
device interface.
Signed-off-by: David Cohen <dacohen@xxxxxxxxx>
---
drivers/media/video/tcm825x.c | 369 ++++++++++++-----------------------------
drivers/media/video/tcm825x.h | 6 +-
2 files changed, 109 insertions(+), 266 deletions(-)
diff --git a/drivers/media/video/tcm825x.c b/drivers/media/video/tcm825x.c
index 54681a5..36080f1 100644
--- a/drivers/media/video/tcm825x.c
+++ b/drivers/media/video/tcm825x.c
@@ -7,7 +7,7 @@
*
* Contact: Sakari Ailus <sakari.ailus@xxxxxxxxx>
*
- * Based on code from David Cohen <david.cohen@xxxxxxxxxxx>
+ * Based on code from David Cohen <dacohen@xxxxxxxxx>
*
* This driver was based on ov9640 sensor driver from MontaVista
*
@@ -27,7 +27,8 @@
*/
#include <linux/i2c.h>
-#include <media/v4l2-int-device.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-mediabus.h>
#include "tcm825x.h"
@@ -41,37 +42,21 @@
#define HIGH_FPS_MODE_LOWER_LIMIT 14
#define DEFAULT_FPS MAX_HALF_FPS
+#define to_tcm825x_sensor(sd) container_of(sd, struct tcm825x_sensor, subdev)
+
struct tcm825x_sensor {
const struct tcm825x_platform_data *platform_data;
- struct v4l2_int_device *v4l2_int_device;
- struct i2c_client *i2c_client;
- struct v4l2_pix_format pix;
+ struct v4l2_subdev subdev;
+ struct v4l2_mbus_framefmt mf;
struct v4l2_fract timeperframe;
};
/* list of image formats supported by TCM825X sensor */
-static const struct v4l2_fmtdesc tcm825x_formats[] = {
- {
- .description = "YUYV (YUV 4:2:2), packed",
- .pixelformat = V4L2_PIX_FMT_UYVY,
- }, {
- /* Note: V4L2 defines RGB565 as:
- *
- * Byte 0 Byte 1
- * g2 g1 g0 r4 r3 r2 r1 r0 b4 b3 b2 b1 b0 g5 g4 g3
- *
- * We interpret RGB565 as:
- *
- * Byte 0 Byte 1
- * g2 g1 g0 b4 b3 b2 b1 b0 r4 r3 r2 r1 r0 g5 g4 g3
- */
- .description = "RGB565, le",
- .pixelformat = V4L2_PIX_FMT_RGB565,
- },
+static const enum v4l2_mbus_pixelcode tcm825x_codes[] = {
+ V4L2_MBUS_FMT_UYVY8_2X8,
+ V4L2_MBUS_FMT_RGB565_2X8_LE,
};
-#define TCM825X_NUM_CAPTURE_FORMATS ARRAY_SIZE(tcm825x_formats)
-
/*
* TCM825X register configuration for all combinations of pixel format and
* image size
@@ -382,24 +367,24 @@ static struct vcontrol *find_vctrl(int id)
* as the requested size, or the smallest image size if the requested size
* has fewer pixels than the smallest image.
*/
-static enum image_size tcm825x_find_size(struct v4l2_int_device *s,
+static enum image_size tcm825x_find_size(struct v4l2_subdev *sd,
unsigned int width,
unsigned int height)
{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
enum image_size isize;
unsigned long pixels = width * height;
- struct tcm825x_sensor *sensor = s->priv;
for (isize = subQCIF; isize < VGA; isize++) {
if (tcm825x_sizes[isize + 1].height
* tcm825x_sizes[isize + 1].width > pixels) {
- dev_dbg(&sensor->i2c_client->dev, "size %d\n", isize);
+ dev_dbg(&client->dev, "size %d\n", isize);
return isize;
}
}
- dev_dbg(&sensor->i2c_client->dev, "format default VGA\n");
+ dev_dbg(&client->dev, "format default VGA\n");
return VGA;
}
@@ -410,11 +395,12 @@ static enum image_size tcm825x_find_size(struct v4l2_int_device *s,
* fraction. Returns zero if successful, or non-zero otherwise. The
* actual frame period is returned in fper.
*/
-static int tcm825x_configure(struct v4l2_int_device *s)
+static int tcm825x_configure(struct v4l2_subdev *sd)
{
- struct tcm825x_sensor *sensor = s->priv;
- struct v4l2_pix_format *pix = &sensor->pix;
- enum image_size isize = tcm825x_find_size(s, pix->width, pix->height);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
+ struct v4l2_mbus_framefmt *mf = &sensor->mf;
+ enum image_size isize = tcm825x_find_size(sd, mf->width, mf->height);
struct v4l2_fract *fper = &sensor->timeperframe;
enum pixel_format pfmt;
int err;
@@ -422,37 +408,32 @@ static int tcm825x_configure(struct v4l2_int_device *s)
u8 val;
/* common register initialization */
- err = tcm825x_write_default_regs(
- sensor->i2c_client, sensor->platform_data->default_regs());
+ err = tcm825x_write_default_regs(client,
+ sensor->platform_data->default_regs());
if (err)
return err;
/* configure image size */
val = tcm825x_siz_reg[isize]->val;
- dev_dbg(&sensor->i2c_client->dev,
- "configuring image size %d\n", isize);
- err = tcm825x_write_reg_mask(sensor->i2c_client,
- tcm825x_siz_reg[isize]->reg, val);
+ dev_dbg(&client->dev, "configuring image size %d\n", isize);
+ err = tcm825x_write_reg_mask(client, tcm825x_siz_reg[isize]->reg, val);
if (err)
return err;
/* configure pixel format */
- switch (pix->pixelformat) {
- default:
- case V4L2_PIX_FMT_RGB565:
+ switch (mf->code) {
+ case V4L2_MBUS_FMT_RGB565_2X8_LE:
pfmt = RGB565;
break;
- case V4L2_PIX_FMT_UYVY:
+ default:
pfmt = YUV422;
break;
}
- dev_dbg(&sensor->i2c_client->dev,
- "configuring pixel format %d\n", pfmt);
+ dev_dbg(&client->dev, "configuring pixel format %d\n", pfmt);
val = tcm825x_fmt_reg[pfmt]->val;
- err = tcm825x_write_reg_mask(sensor->i2c_client,
- tcm825x_fmt_reg[pfmt]->reg, val);
+ err = tcm825x_write_reg_mask(client, tcm825x_fmt_reg[pfmt]->reg, val);
if (err)
return err;
@@ -462,16 +443,15 @@ static int tcm825x_configure(struct v4l2_int_device *s)
*/
tgt_fps = fper->denominator / fper->numerator;
if (tgt_fps <= HIGH_FPS_MODE_LOWER_LIMIT) {
- val = tcm825x_read_reg(sensor->i2c_client, 0x02);
+ val = tcm825x_read_reg(client, 0x02);
val |= 0x80;
- tcm825x_write_reg(sensor->i2c_client, 0x02, val);
+ tcm825x_write_reg(client, 0x02, val);
}
return 0;
}
-static int ioctl_queryctrl(struct v4l2_int_device *s,
- struct v4l2_queryctrl *qc)
+static int tcm825x_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
struct vcontrol *control;
@@ -485,11 +465,10 @@ static int ioctl_queryctrl(struct v4l2_int_device *s,
return 0;
}
-static int ioctl_g_ctrl(struct v4l2_int_device *s,
- struct v4l2_control *vc)
+static int tcm825x_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *vc)
{
- struct tcm825x_sensor *sensor = s->priv;
- struct i2c_client *client = sensor->i2c_client;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
int val, r;
struct vcontrol *lvc;
@@ -530,11 +509,10 @@ static int ioctl_g_ctrl(struct v4l2_int_device *s,
return 0;
}
-static int ioctl_s_ctrl(struct v4l2_int_device *s,
- struct v4l2_control *vc)
+static int tcm825x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *vc)
{
- struct tcm825x_sensor *sensor = s->priv;
- struct i2c_client *client = sensor->i2c_client;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
struct vcontrol *lvc;
int val = vc->value;
@@ -569,104 +547,79 @@ static int ioctl_s_ctrl(struct v4l2_int_device *s,
return 0;
}
-static int ioctl_enum_fmt_cap(struct v4l2_int_device *s,
- struct v4l2_fmtdesc *fmt)
+static int tcm825x_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
+ enum v4l2_mbus_pixelcode *code)
{
- int index = fmt->index;
-
- switch (fmt->type) {
- case V4L2_BUF_TYPE_VIDEO_CAPTURE:
- if (index >= TCM825X_NUM_CAPTURE_FORMATS)
- return -EINVAL;
- break;
-
- default:
+ if (index >= ARRAY_SIZE(tcm825x_codes))
return -EINVAL;
- }
- fmt->flags = tcm825x_formats[index].flags;
- strlcpy(fmt->description, tcm825x_formats[index].description,
- sizeof(fmt->description));
- fmt->pixelformat = tcm825x_formats[index].pixelformat;
+ *code = tcm825x_codes[index];
return 0;
}
-static int ioctl_try_fmt_cap(struct v4l2_int_device *s,
- struct v4l2_format *f)
+static int tcm825x_try_fmt(struct v4l2_subdev *sd,
+ struct v4l2_mbus_framefmt *mf)
{
- struct tcm825x_sensor *sensor = s->priv;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
enum image_size isize;
int ifmt;
- struct v4l2_pix_format *pix = &f->fmt.pix;
- isize = tcm825x_find_size(s, pix->width, pix->height);
- dev_dbg(&sensor->i2c_client->dev, "isize = %d num_capture = %lu\n",
- isize, (unsigned long)TCM825X_NUM_CAPTURE_FORMATS);
+ isize = tcm825x_find_size(sd, mf->width, mf->height);
+ dev_dbg(&client->dev, "isize = %d num_capture = %d\n",
+ isize, ARRAY_SIZE(tcm825x_codes));
- pix->width = tcm825x_sizes[isize].width;
- pix->height = tcm825x_sizes[isize].height;
+ mf->width = tcm825x_sizes[isize].width;
+ mf->height = tcm825x_sizes[isize].height;
- for (ifmt = 0; ifmt < TCM825X_NUM_CAPTURE_FORMATS; ifmt++)
- if (pix->pixelformat == tcm825x_formats[ifmt].pixelformat)
+ for (ifmt = 0; ifmt < ARRAY_SIZE(tcm825x_codes); ifmt++)
+ if (mf->code == tcm825x_codes[ifmt])
break;
- if (ifmt == TCM825X_NUM_CAPTURE_FORMATS)
+ if (ifmt == ARRAY_SIZE(tcm825x_codes))
ifmt = 0; /* Default = YUV 4:2:2 */
- pix->pixelformat = tcm825x_formats[ifmt].pixelformat;
- pix->field = V4L2_FIELD_NONE;
- pix->bytesperline = pix->width * TCM825X_BYTES_PER_PIXEL;
- pix->sizeimage = pix->bytesperline * pix->height;
- pix->priv = 0;
- dev_dbg(&sensor->i2c_client->dev, "format = 0x%08x\n",
- pix->pixelformat);
+ mf->code = tcm825x_codes[ifmt];
+ mf->field = V4L2_FIELD_NONE;
+ dev_dbg(&client->dev, "format = 0x%08x\n", mf->code);
- switch (pix->pixelformat) {
- case V4L2_PIX_FMT_UYVY:
- default:
- pix->colorspace = V4L2_COLORSPACE_JPEG;
+ switch (mf->code) {
+ case V4L2_MBUS_FMT_RGB565_2X8_LE:
+ mf->colorspace = V4L2_COLORSPACE_SRGB;
break;
- case V4L2_PIX_FMT_RGB565:
- pix->colorspace = V4L2_COLORSPACE_SRGB;
+ default: /* YUV */
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
break;
}
return 0;
}
-static int ioctl_s_fmt_cap(struct v4l2_int_device *s,
- struct v4l2_format *f)
+static int tcm825x_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
{
- struct tcm825x_sensor *sensor = s->priv;
- struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
int rval;
- rval = ioctl_try_fmt_cap(s, f);
+ rval = tcm825x_try_fmt(sd, mf);
if (rval)
return rval;
+ sensor->mf = *mf;
- rval = tcm825x_configure(s);
-
- sensor->pix = *pix;
-
- return rval;
+ return tcm825x_configure(sd);
}
-static int ioctl_g_fmt_cap(struct v4l2_int_device *s,
- struct v4l2_format *f)
+static int tcm825x_g_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
{
- struct tcm825x_sensor *sensor = s->priv;
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
- f->fmt.pix = sensor->pix;
+ *mf = sensor->mf;
return 0;
}
-static int ioctl_g_parm(struct v4l2_int_device *s,
- struct v4l2_streamparm *a)
+static int tcm825x_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *a)
{
- struct tcm825x_sensor *sensor = s->priv;
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
struct v4l2_captureparm *cparm = &a->parm.capture;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
@@ -681,10 +634,9 @@ static int ioctl_g_parm(struct v4l2_int_device *s,
return 0;
}
-static int ioctl_s_parm(struct v4l2_int_device *s,
- struct v4l2_streamparm *a)
+static int tcm825x_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *a)
{
- struct tcm825x_sensor *sensor = s->priv;
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
struct v4l2_fract *timeperframe = &a->parm.capture.timeperframe;
u32 tgt_fps; /* target frames per secound */
int rval;
@@ -710,147 +662,52 @@ static int ioctl_s_parm(struct v4l2_int_device *s,
sensor->timeperframe = *timeperframe;
- rval = tcm825x_configure(s);
+ rval = tcm825x_configure(sd);
return rval;
}
-static int ioctl_s_power(struct v4l2_int_device *s, int on)
+static int tcm825x_s_power(struct v4l2_subdev *sd, int on)
{
- struct tcm825x_sensor *sensor = s->priv;
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
return sensor->platform_data->power_set(on);
}
-/*
- * Given the image capture format in pix, the nominal frame period in
- * timeperframe, calculate the required xclk frequency.
- *
- * TCM825X input frequency characteristics are:
- * Minimum 11.9 MHz, Typical 24.57 MHz and maximum 25/27 MHz
- */
-
-static int ioctl_g_ifparm(struct v4l2_int_device *s, struct v4l2_ifparm *p)
-{
- struct tcm825x_sensor *sensor = s->priv;
- struct v4l2_fract *timeperframe = &sensor->timeperframe;
- u32 tgt_xclk; /* target xclk */
- u32 tgt_fps; /* target frames per secound */
- int rval;
-
- rval = sensor->platform_data->ifparm(p);
- if (rval)
- return rval;
-
- tgt_fps = timeperframe->denominator / timeperframe->numerator;
-
- tgt_xclk = (tgt_fps <= HIGH_FPS_MODE_LOWER_LIMIT) ?
- (2457 * tgt_fps) / MAX_HALF_FPS :
- (2457 * tgt_fps) / MAX_FPS;
- tgt_xclk *= 10000;
-
- tgt_xclk = min(tgt_xclk, (u32)TCM825X_XCLK_MAX);
- tgt_xclk = max(tgt_xclk, (u32)TCM825X_XCLK_MIN);
-
- p->u.bt656.clock_curr = tgt_xclk;
-
- return 0;
-}
-
-static int ioctl_g_needs_reset(struct v4l2_int_device *s, void *buf)
-{
- struct tcm825x_sensor *sensor = s->priv;
-
- return sensor->platform_data->needs_reset(s, buf, &sensor->pix);
-}
-
-static int ioctl_reset(struct v4l2_int_device *s)
+static int tcm825x_s_stream(struct v4l2_subdev *sd, int enable)
{
- return -EBUSY;
+ return tcm825x_configure(sd);
}
-static int ioctl_init(struct v4l2_int_device *s)
-{
- return tcm825x_configure(s);
-}
-
-static int ioctl_dev_exit(struct v4l2_int_device *s)
-{
- return 0;
-}
-
-static int ioctl_dev_init(struct v4l2_int_device *s)
-{
- struct tcm825x_sensor *sensor = s->priv;
- int r;
-
- r = tcm825x_read_reg(sensor->i2c_client, 0x01);
- if (r < 0)
- return r;
- if (r == 0) {
- dev_err(&sensor->i2c_client->dev, "device not detected\n");
- return -EIO;
- }
- return 0;
-}
-
-static struct v4l2_int_ioctl_desc tcm825x_ioctl_desc[] = {
- { vidioc_int_dev_init_num,
- (v4l2_int_ioctl_func *)ioctl_dev_init },
- { vidioc_int_dev_exit_num,
- (v4l2_int_ioctl_func *)ioctl_dev_exit },
- { vidioc_int_s_power_num,
- (v4l2_int_ioctl_func *)ioctl_s_power },
- { vidioc_int_g_ifparm_num,
- (v4l2_int_ioctl_func *)ioctl_g_ifparm },
- { vidioc_int_g_needs_reset_num,
- (v4l2_int_ioctl_func *)ioctl_g_needs_reset },
- { vidioc_int_reset_num,
- (v4l2_int_ioctl_func *)ioctl_reset },
- { vidioc_int_init_num,
- (v4l2_int_ioctl_func *)ioctl_init },
- { vidioc_int_enum_fmt_cap_num,
- (v4l2_int_ioctl_func *)ioctl_enum_fmt_cap },
- { vidioc_int_try_fmt_cap_num,
- (v4l2_int_ioctl_func *)ioctl_try_fmt_cap },
- { vidioc_int_g_fmt_cap_num,
- (v4l2_int_ioctl_func *)ioctl_g_fmt_cap },
- { vidioc_int_s_fmt_cap_num,
- (v4l2_int_ioctl_func *)ioctl_s_fmt_cap },
- { vidioc_int_g_parm_num,
- (v4l2_int_ioctl_func *)ioctl_g_parm },
- { vidioc_int_s_parm_num,
- (v4l2_int_ioctl_func *)ioctl_s_parm },
- { vidioc_int_queryctrl_num,
- (v4l2_int_ioctl_func *)ioctl_queryctrl },
- { vidioc_int_g_ctrl_num,
- (v4l2_int_ioctl_func *)ioctl_g_ctrl },
- { vidioc_int_s_ctrl_num,
- (v4l2_int_ioctl_func *)ioctl_s_ctrl },
+static struct v4l2_subdev_core_ops tcm825x_subdev_core_ops = {
+ .queryctrl = tcm825x_queryctrl,
+ .g_ctrl = tcm825x_g_ctrl,
+ .s_ctrl = tcm825x_s_ctrl,
+ .s_power = tcm825x_s_power,
};
-static struct v4l2_int_slave tcm825x_slave = {
- .ioctls = tcm825x_ioctl_desc,
- .num_ioctls = ARRAY_SIZE(tcm825x_ioctl_desc),
+static struct v4l2_subdev_video_ops tcm825x_subdev_video_ops = {
+ .g_parm = tcm825x_g_parm,
+ .s_parm = tcm825x_s_parm,
+ .enum_mbus_fmt = tcm825x_enum_fmt,
+ .g_mbus_fmt = tcm825x_g_fmt,
+ .try_mbus_fmt = tcm825x_try_fmt,
+ .s_mbus_fmt = tcm825x_s_fmt,
+ .s_stream = tcm825x_s_stream,
};
-static struct tcm825x_sensor tcm825x;
-
-static struct v4l2_int_device tcm825x_int_device = {
- .module = THIS_MODULE,
- .name = TCM825X_NAME,
- .priv = &tcm825x,
- .type = v4l2_int_type_slave,
- .u = {
- .slave = &tcm825x_slave,
- },
+static struct v4l2_subdev_ops tcm825x_subdev_ops = {
+ .core = &tcm825x_subdev_core_ops,
+ .video = &tcm825x_subdev_video_ops,
};
static int tcm825x_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
- struct tcm825x_sensor *sensor = &tcm825x;
+ struct tcm825x_sensor *sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
if (i2c_get_clientdata(client))
return -EBUSY;
@@ -860,28 +717,25 @@ static int tcm825x_probe(struct i2c_client *client,
|| !sensor->platform_data->is_okay())
return -ENODEV;
- sensor->v4l2_int_device = &tcm825x_int_device;
-
- sensor->i2c_client = client;
- i2c_set_clientdata(client, sensor);
-
/* Make the default capture format QVGA RGB565 */
- sensor->pix.width = tcm825x_sizes[QVGA].width;
- sensor->pix.height = tcm825x_sizes[QVGA].height;
- sensor->pix.pixelformat = V4L2_PIX_FMT_RGB565;
+ sensor->mf.width = tcm825x_sizes[QVGA].width;
+ sensor->mf.height = tcm825x_sizes[QVGA].height;
+ sensor->mf.code = V4L2_MBUS_FMT_UYVY8_2X8;
+ sensor->mf.colorspace = V4L2_COLORSPACE_JPEG;
+ sensor->timeperframe.numerator = 1;
+ sensor->timeperframe.denominator = DEFAULT_FPS,
- return v4l2_int_device_register(sensor->v4l2_int_device);
+ v4l2_i2c_subdev_init(&sensor->subdev, client, &tcm825x_subdev_ops);
+
+ return 0;
}
static int tcm825x_remove(struct i2c_client *client)
{
- struct tcm825x_sensor *sensor = i2c_get_clientdata(client);
-
- if (!client->adapter)
- return -ENODEV; /* our client isn't attached */
-
- v4l2_int_device_unregister(sensor->v4l2_int_device);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct tcm825x_sensor *sensor = to_tcm825x_sensor(sd);
+ kfree(sensor);
return 0;
}
@@ -900,13 +754,6 @@ static struct i2c_driver tcm825x_i2c_driver = {
.id_table = tcm825x_id,
};
-static struct tcm825x_sensor tcm825x = {
- .timeperframe = {
- .numerator = 1,
- .denominator = DEFAULT_FPS,
- },
-};
-
static int __init tcm825x_init(void)
{
int rval;
diff --git a/drivers/media/video/tcm825x.h b/drivers/media/video/tcm825x.h
index 5b7e696..fd15332 100644
--- a/drivers/media/video/tcm825x.h
+++ b/drivers/media/video/tcm825x.h
@@ -16,8 +16,7 @@
#define TCM825X_H
#include <linux/videodev2.h>
-
-#include <media/v4l2-int-device.h>
+#include <media/v4l2-device.h>
#define TCM825X_NAME "tcm825x"
@@ -179,9 +178,6 @@ struct tcm825x_platform_data {
int (*power_set)(int power);
/* Default registers written after power-on or reset. */
const struct tcm825x_reg *(*default_regs)(void);
- int (*needs_reset)(struct v4l2_int_device *s, void *buf,
- struct v4l2_pix_format *fmt);
- int (*ifparm)(struct v4l2_ifparm *p);
int (*is_upside_down)(void);
};
--
1.7.1
--
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