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-rw-r--r--drivers/media/i2c/ov7670.c101
1 files changed, 72 insertions, 29 deletions
diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 882ddf6f66d3..51b198f79077 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -183,6 +183,27 @@ MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define REG_HAECC7 0xaa /* Hist AEC/AGC control 7 */
#define REG_BD60MAX 0xab /* 60hz banding step limit */
+enum ov7670_model {
+ MODEL_OV7670 = 0,
+ MODEL_OV7675,
+};
+
+struct ov7670_win_size {
+ int width;
+ int height;
+ unsigned char com7_bit;
+ int hstart; /* Start/stop values for the camera. Note */
+ int hstop; /* that they do not always make complete */
+ int vstart; /* sense to humans, but evidently the sensor */
+ int vstop; /* will do the right thing... */
+ struct regval_list *regs; /* Regs to tweak */
+};
+
+struct ov7670_devtype {
+ /* formats supported for each model */
+ struct ov7670_win_size *win_sizes;
+ unsigned int n_win_sizes;
+};
/*
* Information we maintain about a known sensor.
@@ -198,6 +219,7 @@ struct ov7670_info {
int clock_speed; /* External clock speed (MHz) */
u8 clkrc; /* Clock divider value */
bool use_smbus; /* Use smbus I/O instead of I2C */
+ const struct ov7670_devtype *devtype; /* Device specifics */
};
static inline struct ov7670_info *to_state(struct v4l2_subdev *sd)
@@ -652,65 +674,70 @@ static struct regval_list ov7670_qcif_regs[] = {
{ 0xff, 0xff },
};
-static struct ov7670_win_size {
- int width;
- int height;
- unsigned char com7_bit;
- int hstart; /* Start/stop values for the camera. Note */
- int hstop; /* that they do not always make complete */
- int vstart; /* sense to humans, but evidently the sensor */
- int vstop; /* will do the right thing... */
- struct regval_list *regs; /* Regs to tweak */
-/* h/vref stuff */
-} ov7670_win_sizes[] = {
+static struct ov7670_win_size ov7670_win_sizes[] = {
/* VGA */
{
.width = VGA_WIDTH,
.height = VGA_HEIGHT,
.com7_bit = COM7_FMT_VGA,
- .hstart = 158, /* These values from */
- .hstop = 14, /* Omnivision */
+ .hstart = 158, /* These values from */
+ .hstop = 14, /* Omnivision */
.vstart = 10,
.vstop = 490,
- .regs = NULL,
+ .regs = NULL,
},
/* CIF */
{
.width = CIF_WIDTH,
.height = CIF_HEIGHT,
.com7_bit = COM7_FMT_CIF,
- .hstart = 170, /* Empirically determined */
+ .hstart = 170, /* Empirically determined */
.hstop = 90,
.vstart = 14,
.vstop = 494,
- .regs = NULL,
+ .regs = NULL,
},
/* QVGA */
{
.width = QVGA_WIDTH,
.height = QVGA_HEIGHT,
.com7_bit = COM7_FMT_QVGA,
- .hstart = 168, /* Empirically determined */
+ .hstart = 168, /* Empirically determined */
.hstop = 24,
.vstart = 12,
.vstop = 492,
- .regs = NULL,
+ .regs = NULL,
},
/* QCIF */
{
.width = QCIF_WIDTH,
.height = QCIF_HEIGHT,
.com7_bit = COM7_FMT_VGA, /* see comment above */
- .hstart = 456, /* Empirically determined */
+ .hstart = 456, /* Empirically determined */
.hstop = 24,
.vstart = 14,
.vstop = 494,
- .regs = ov7670_qcif_regs,
- },
+ .regs = ov7670_qcif_regs,
+ }
};
-#define N_WIN_SIZES (ARRAY_SIZE(ov7670_win_sizes))
-
+static struct ov7670_win_size ov7675_win_sizes[] = {
+ /*
+ * Currently, only VGA is supported. Theoretically it could be possible
+ * to support CIF, QVGA and QCIF too. Taking values for ov7670 as a
+ * base and tweak them empirically could be required.
+ */
+ {
+ .width = VGA_WIDTH,
+ .height = VGA_HEIGHT,
+ .com7_bit = COM7_FMT_VGA,
+ .hstart = 158, /* These values from */
+ .hstop = 14, /* Omnivision */
+ .vstart = 14, /* Empirically determined */
+ .vstop = 494,
+ .regs = NULL,
+ }
+};
/*
* Store a set of start/stop values into the camera.
@@ -761,6 +788,8 @@ static int ov7670_try_fmt_internal(struct v4l2_subdev *sd,
{
int index;
struct ov7670_win_size *wsize;
+ struct ov7670_info *info = to_state(sd);
+ unsigned int n_win_sizes = info->devtype->n_win_sizes;
for (index = 0; index < N_OV7670_FMTS; index++)
if (ov7670_formats[index].mbus_code == fmt->code)
@@ -780,11 +809,11 @@ static int ov7670_try_fmt_internal(struct v4l2_subdev *sd,
* Round requested image size down to the nearest
* we support, but not below the smallest.
*/
- for (wsize = ov7670_win_sizes; wsize < ov7670_win_sizes + N_WIN_SIZES;
- wsize++)
+ for (wsize = info->devtype->win_sizes;
+ wsize < info->devtype->win_sizes + n_win_sizes; wsize++)
if (fmt->width >= wsize->width && fmt->height >= wsize->height)
break;
- if (wsize >= ov7670_win_sizes + N_WIN_SIZES)
+ if (wsize >= info->devtype->win_sizes + n_win_sizes)
wsize--; /* Take the smallest one */
if (ret_wsize != NULL)
*ret_wsize = wsize;
@@ -931,13 +960,14 @@ static int ov7670_enum_framesizes(struct v4l2_subdev *sd,
int i;
int num_valid = -1;
__u32 index = fsize->index;
+ unsigned int n_win_sizes = info->devtype->n_win_sizes;
/*
* If a minimum width/height was requested, filter out the capture
* windows that fall outside that.
*/
- for (i = 0; i < N_WIN_SIZES; i++) {
- struct ov7670_win_size *win = &ov7670_win_sizes[index];
+ for (i = 0; i < n_win_sizes; i++) {
+ struct ov7670_win_size *win = &info->devtype->win_sizes[index];
if (info->min_width && win->width < info->min_width)
continue;
if (info->min_height && win->height < info->min_height)
@@ -1510,6 +1540,17 @@ static const struct v4l2_subdev_ops ov7670_ops = {
/* ----------------------------------------------------------------------- */
+static const struct ov7670_devtype ov7670_devdata[] = {
+ [MODEL_OV7670] = {
+ .win_sizes = ov7670_win_sizes,
+ .n_win_sizes = ARRAY_SIZE(ov7670_win_sizes),
+ },
+ [MODEL_OV7675] = {
+ .win_sizes = ov7675_win_sizes,
+ .n_win_sizes = ARRAY_SIZE(ov7675_win_sizes),
+ },
+};
+
static int ov7670_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -1551,6 +1592,7 @@ static int ov7670_probe(struct i2c_client *client,
v4l_info(client, "chip found @ 0x%02x (%s)\n",
client->addr << 1, client->adapter->name);
+ info->devtype = &ov7670_devdata[id->driver_data];
info->fmt = &ov7670_formats[0];
info->sat = 128; /* Review this */
info->clkrc = info->clock_speed / 30;
@@ -1568,7 +1610,8 @@ static int ov7670_remove(struct i2c_client *client)
}
static const struct i2c_device_id ov7670_id[] = {
- { "ov7670", 0 },
+ { "ov7670", MODEL_OV7670 },
+ { "ov7675", MODEL_OV7675 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ov7670_id);

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