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linux/drivers/media/video/tw9910.c

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/*
* tw9910 Video Driver
*
* Copyright (C) 2008 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@renesas.com>
*
* Based on ov772x driver,
*
* Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-subdev.h>
#include <media/soc_camera.h>
#include <media/tw9910.h>
#define GET_ID(val) ((val & 0xF8) >> 3)
#define GET_ReV(val) (val & 0x07)
/*
* register offset
*/
#define ID 0x00 /* Product ID Code Register */
#define STATUS1 0x01 /* Chip Status Register I */
#define INFORM 0x02 /* Input Format */
#define OPFORM 0x03 /* Output Format Control Register */
#define DLYCTR 0x04 /* Hysteresis and HSYNC Delay Control */
#define OUTCTR1 0x05 /* Output Control I */
#define ACNTL1 0x06 /* Analog Control Register 1 */
#define CROP_HI 0x07 /* Cropping Register, High */
#define VDELAY_LO 0x08 /* Vertical Delay Register, Low */
#define VACTIVE_LO 0x09 /* Vertical Active Register, Low */
#define HDELAY_LO 0x0A /* Horizontal Delay Register, Low */
#define HACTIVE_LO 0x0B /* Horizontal Active Register, Low */
#define CNTRL1 0x0C /* Control Register I */
#define VSCALE_LO 0x0D /* Vertical Scaling Register, Low */
#define SCALE_HI 0x0E /* Scaling Register, High */
#define HSCALE_LO 0x0F /* Horizontal Scaling Register, Low */
#define BRIGHT 0x10 /* BRIGHTNESS Control Register */
#define CONTRAST 0x11 /* CONTRAST Control Register */
#define SHARPNESS 0x12 /* SHARPNESS Control Register I */
#define SAT_U 0x13 /* Chroma (U) Gain Register */
#define SAT_V 0x14 /* Chroma (V) Gain Register */
#define HUE 0x15 /* Hue Control Register */
#define CORING1 0x17
#define CORING2 0x18 /* Coring and IF compensation */
#define VBICNTL 0x19 /* VBI Control Register */
#define ACNTL2 0x1A /* Analog Control 2 */
#define OUTCTR2 0x1B /* Output Control 2 */
#define SDT 0x1C /* Standard Selection */
#define SDTR 0x1D /* Standard Recognition */
#define TEST 0x1F /* Test Control Register */
#define CLMPG 0x20 /* Clamping Gain */
#define IAGC 0x21 /* Individual AGC Gain */
#define AGCGAIN 0x22 /* AGC Gain */
#define PEAKWT 0x23 /* White Peak Threshold */
#define CLMPL 0x24 /* Clamp level */
#define SYNCT 0x25 /* Sync Amplitude */
#define MISSCNT 0x26 /* Sync Miss Count Register */
#define PCLAMP 0x27 /* Clamp Position Register */
#define VCNTL1 0x28 /* Vertical Control I */
#define VCNTL2 0x29 /* Vertical Control II */
#define CKILL 0x2A /* Color Killer Level Control */
#define COMB 0x2B /* Comb Filter Control */
#define LDLY 0x2C /* Luma Delay and H Filter Control */
#define MISC1 0x2D /* Miscellaneous Control I */
#define LOOP 0x2E /* LOOP Control Register */
#define MISC2 0x2F /* Miscellaneous Control II */
#define MVSN 0x30 /* Macrovision Detection */
#define STATUS2 0x31 /* Chip STATUS II */
#define HFREF 0x32 /* H monitor */
#define CLMD 0x33 /* CLAMP MODE */
#define IDCNTL 0x34 /* ID Detection Control */
#define CLCNTL1 0x35 /* Clamp Control I */
#define ANAPLLCTL 0x4C
#define VBIMIN 0x4D
#define HSLOWCTL 0x4E
#define WSS3 0x4F
#define FILLDATA 0x50
#define SDID 0x51
#define DID 0x52
#define WSS1 0x53
#define WSS2 0x54
#define VVBI 0x55
#define LCTL6 0x56
#define LCTL7 0x57
#define LCTL8 0x58
#define LCTL9 0x59
#define LCTL10 0x5A
#define LCTL11 0x5B
#define LCTL12 0x5C
#define LCTL13 0x5D
#define LCTL14 0x5E
#define LCTL15 0x5F
#define LCTL16 0x60
#define LCTL17 0x61
#define LCTL18 0x62
#define LCTL19 0x63
#define LCTL20 0x64
#define LCTL21 0x65
#define LCTL22 0x66
#define LCTL23 0x67
#define LCTL24 0x68
#define LCTL25 0x69
#define LCTL26 0x6A
#define HSGEGIN 0x6B
#define HSEND 0x6C
#define OVSDLY 0x6D
#define OVSEND 0x6E
#define VBIDELAY 0x6F
/*
* register detail
*/
/* INFORM */
#define FC27_ON 0x40 /* 1 : Input crystal clock frequency is 27MHz */
#define FC27_FF 0x00 /* 0 : Square pixel mode. */
/* Must use 24.54MHz for 60Hz field rate */
/* source or 29.5MHz for 50Hz field rate */
#define IFSEL_S 0x10 /* 01 : S-video decoding */
#define IFSEL_C 0x00 /* 00 : Composite video decoding */
/* Y input video selection */
#define YSEL_M0 0x00 /* 00 : Mux0 selected */
#define YSEL_M1 0x04 /* 01 : Mux1 selected */
#define YSEL_M2 0x08 /* 10 : Mux2 selected */
#define YSEL_M3 0x10 /* 11 : Mux3 selected */
/* OPFORM */
#define MODE 0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
/* 1 : ITU-R-656 compatible data sequence format */
#define LEN 0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
/* 1 : 16-bit YCrCb 4:2:2 output format.*/
#define LLCMODE 0x20 /* 1 : LLC output mode. */
/* 0 : free-run output mode */
#define AINC 0x10 /* Serial interface auto-indexing control */
/* 0 : auto-increment */
/* 1 : non-auto */
#define VSCTL 0x08 /* 1 : Vertical out ctrl by DVALID */
/* 0 : Vertical out ctrl by HACTIVE and DVALID */
#define OEN 0x04 /* Output Enable together with TRI_SEL. */
/* OUTCTR1 */
#define VSP_LO 0x00 /* 0 : VS pin output polarity is active low */
#define VSP_HI 0x80 /* 1 : VS pin output polarity is active high. */
/* VS pin output control */
#define VSSL_VSYNC 0x00 /* 0 : VSYNC */
#define VSSL_VACT 0x10 /* 1 : VACT */
#define VSSL_FIELD 0x20 /* 2 : FIELD */
#define VSSL_VVALID 0x30 /* 3 : VVALID */
#define VSSL_ZERO 0x70 /* 7 : 0 */
#define HSP_LOW 0x00 /* 0 : HS pin output polarity is active low */
#define HSP_HI 0x08 /* 1 : HS pin output polarity is active high.*/
/* HS pin output control */
#define HSSL_HACT 0x00 /* 0 : HACT */
#define HSSL_HSYNC 0x01 /* 1 : HSYNC */
#define HSSL_DVALID 0x02 /* 2 : DVALID */
#define HSSL_HLOCK 0x03 /* 3 : HLOCK */
#define HSSL_ASYNCW 0x04 /* 4 : ASYNCW */
#define HSSL_ZERO 0x07 /* 7 : 0 */
/* ACNTL1 */
#define SRESET 0x80 /* resets the device to its default state
* but all register content remain unchanged.
* This bit is self-resetting.
*/
/* VBICNTL */
/* RTSEL : control the real time signal
* output from the MPOUT pin
*/
#define RTSEL_MASK 0x07
#define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
#define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
#define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
#define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
#define RTSEL_MONO 0x04 /* 0100 = MONO */
#define RTSEL_DET50 0x05 /* 0101 = DET50 */
#define RTSEL_FIELD 0x06 /* 0110 = FIELD */
#define RTSEL_RTCO 0x07 /* 0111 = RTCO ( Real Time Control ) */
/*
* structure
*/
struct regval_list {
unsigned char reg_num;
unsigned char value;
};
struct tw9910_scale_ctrl {
char *name;
unsigned short width;
unsigned short height;
u16 hscale;
u16 vscale;
};
struct tw9910_cropping_ctrl {
u16 vdelay;
u16 vactive;
u16 hdelay;
u16 hactive;
};
struct tw9910_hsync_ctrl {
u16 start;
u16 end;
};
struct tw9910_priv {
struct v4l2_subdev subdev;
struct tw9910_video_info *info;
const struct tw9910_scale_ctrl *scale;
};
/*
* register settings
*/
#define ENDMARKER { 0xff, 0xff }
static const struct regval_list tw9910_default_regs[] =
{
{ OPFORM, 0x00 },
{ OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },
ENDMARKER,
};
static const struct soc_camera_data_format tw9910_color_fmt[] = {
{
.name = "VYUY",
.fourcc = V4L2_PIX_FMT_VYUY,
.depth = 16,
.colorspace = V4L2_COLORSPACE_SMPTE170M,
}
};
static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
{
.name = "NTSC SQ",
.width = 640,
.height = 480,
.hscale = 0x0100,
.vscale = 0x0100,
},
{
.name = "NTSC CCIR601",
.width = 720,
.height = 480,
.hscale = 0x0100,
.vscale = 0x0100,
},
{
.name = "NTSC SQ (CIF)",
.width = 320,
.height = 240,
.hscale = 0x0200,
.vscale = 0x0200,
},
{
.name = "NTSC CCIR601 (CIF)",
.width = 360,
.height = 240,
.hscale = 0x0200,
.vscale = 0x0200,
},
{
.name = "NTSC SQ (QCIF)",
.width = 160,
.height = 120,
.hscale = 0x0400,
.vscale = 0x0400,
},
{
.name = "NTSC CCIR601 (QCIF)",
.width = 180,
.height = 120,
.hscale = 0x0400,
.vscale = 0x0400,
},
};
static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
{
.name = "PAL SQ",
.width = 768,
.height = 576,
.hscale = 0x0100,
.vscale = 0x0100,
},
{
.name = "PAL CCIR601",
.width = 720,
.height = 576,
.hscale = 0x0100,
.vscale = 0x0100,
},
{
.name = "PAL SQ (CIF)",
.width = 384,
.height = 288,
.hscale = 0x0200,
.vscale = 0x0200,
},
{
.name = "PAL CCIR601 (CIF)",
.width = 360,
.height = 288,
.hscale = 0x0200,
.vscale = 0x0200,
},
{
.name = "PAL SQ (QCIF)",
.width = 192,
.height = 144,
.hscale = 0x0400,
.vscale = 0x0400,
},
{
.name = "PAL CCIR601 (QCIF)",
.width = 180,
.height = 144,
.hscale = 0x0400,
.vscale = 0x0400,
},
};
static const struct tw9910_cropping_ctrl tw9910_cropping_ctrl = {
.vdelay = 0x0012,
.vactive = 0x00F0,
.hdelay = 0x0010,
.hactive = 0x02D0,
};
static const struct tw9910_hsync_ctrl tw9910_hsync_ctrl = {
.start = 0x0260,
.end = 0x0300,
};
/*
* general function
*/
static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client), struct tw9910_priv,
subdev);
}
static int tw9910_set_scale(struct i2c_client *client,
const struct tw9910_scale_ctrl *scale)
{
int ret;
ret = i2c_smbus_write_byte_data(client, SCALE_HI,
(scale->vscale & 0x0F00) >> 4 |
(scale->hscale & 0x0F00) >> 8);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
scale->hscale & 0x00FF);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
scale->vscale & 0x00FF);
return ret;
}
static int tw9910_set_cropping(struct i2c_client *client,
const struct tw9910_cropping_ctrl *cropping)
{
int ret;
ret = i2c_smbus_write_byte_data(client, CROP_HI,
(cropping->vdelay & 0x0300) >> 2 |
(cropping->vactive & 0x0300) >> 4 |
(cropping->hdelay & 0x0300) >> 6 |
(cropping->hactive & 0x0300) >> 8);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
cropping->vdelay & 0x00FF);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
cropping->vactive & 0x00FF);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, HDELAY_LO,
cropping->hdelay & 0x00FF);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, HACTIVE_LO,
cropping->hactive & 0x00FF);
return ret;
}
static int tw9910_set_hsync(struct i2c_client *client,
const struct tw9910_hsync_ctrl *hsync)
{
int ret;
/* bit 10 - 3 */
ret = i2c_smbus_write_byte_data(client, HSGEGIN,
(hsync->start & 0x07F8) >> 3);
if (ret < 0)
return ret;
/* bit 10 - 3 */
ret = i2c_smbus_write_byte_data(client, HSEND,
(hsync->end & 0x07F8) >> 3);
if (ret < 0)
return ret;
/* bit 2 - 0 */
ret = i2c_smbus_read_byte_data(client, HSLOWCTL);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(client, HSLOWCTL,
(ret & 0x88) |
(hsync->start & 0x0007) << 4 |
(hsync->end & 0x0007));
return ret;
}
static int tw9910_write_array(struct i2c_client *client,
const struct regval_list *vals)
{
while (vals->reg_num != 0xff) {
int ret = i2c_smbus_write_byte_data(client,
vals->reg_num,
vals->value);
if (ret < 0)
return ret;
vals++;
}
return 0;
}
static int tw9910_mask_set(struct i2c_client *client, u8 command,
u8 mask, u8 set)
{
s32 val = i2c_smbus_read_byte_data(client, command);
if (val < 0)
return val;
val &= ~mask;
val |= set & mask;
return i2c_smbus_write_byte_data(client, command, val);
}
static void tw9910_reset(struct i2c_client *client)
{
i2c_smbus_write_byte_data(client, ACNTL1, SRESET);
msleep(1);
}
static const struct tw9910_scale_ctrl*
tw9910_select_norm(struct soc_camera_device *icd, u32 width, u32 height)
{
const struct tw9910_scale_ctrl *scale;
const struct tw9910_scale_ctrl *ret = NULL;
v4l2_std_id norm = icd->vdev->current_norm;
__u32 diff = 0xffffffff, tmp;
int size, i;
if (norm & V4L2_STD_NTSC) {
scale = tw9910_ntsc_scales;
size = ARRAY_SIZE(tw9910_ntsc_scales);
} else if (norm & V4L2_STD_PAL) {
scale = tw9910_pal_scales;
size = ARRAY_SIZE(tw9910_pal_scales);
} else {
return NULL;
}
for (i = 0; i < size; i++) {
tmp = abs(width - scale[i].width) +
abs(height - scale[i].height);
if (tmp < diff) {
diff = tmp;
ret = scale + i;
}
}
return ret;
}
/*
* soc_camera_ops function
*/
static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = sd->priv;
struct tw9910_priv *priv = to_tw9910(client);
if (!enable)
return 0;
if (!priv->scale) {
dev_err(&client->dev, "norm select error\n");
return -EPERM;
}
dev_dbg(&client->dev, "%s %dx%d\n",
priv->scale->name,
priv->scale->width,
priv->scale->height);
return 0;
}
static int tw9910_set_bus_param(struct soc_camera_device *icd,
unsigned long flags)
{
return 0;
}
static unsigned long tw9910_query_bus_param(struct soc_camera_device *icd)
{
struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
struct tw9910_priv *priv = to_tw9910(client);
struct soc_camera_link *icl = to_soc_camera_link(icd);
unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
SOCAM_DATA_ACTIVE_HIGH | priv->info->buswidth;
return soc_camera_apply_sensor_flags(icl, flags);
}
static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
{
int ret = -EINVAL;
if (norm & (V4L2_STD_NTSC | V4L2_STD_PAL))
ret = 0;
return ret;
}
static int tw9910_enum_input(struct soc_camera_device *icd,
struct v4l2_input *inp)
{
inp->type = V4L2_INPUT_TYPE_TUNER;
inp->std = V4L2_STD_UNKNOWN;
strcpy(inp->name, "Video");
return 0;
}
static int tw9910_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
id->ident = V4L2_IDENT_TW9910;
id->revision = 0;
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int tw9910_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = sd->priv;
int ret;
if (reg->reg > 0xff)
return -EINVAL;
ret = i2c_smbus_read_byte_data(client, reg->reg);
if (ret < 0)
return ret;
/* ret = int
* reg->val = __u64
*/
reg->val = (__u64)ret;
return 0;
}
static int tw9910_s_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = sd->priv;
if (reg->reg > 0xff ||
reg->val > 0xff)
return -EINVAL;
return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
}
#endif
static int tw9910_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct v4l2_rect *rect = &a->c;
struct i2c_client *client = sd->priv;
struct tw9910_priv *priv = to_tw9910(client);
struct soc_camera_device *icd = client->dev.platform_data;
int ret = -EINVAL;
u8 val;
/*
* select suitable norm
*/
priv->scale = tw9910_select_norm(icd, rect->width, rect->height);
if (!priv->scale)
goto tw9910_set_fmt_error;
/*
* reset hardware
*/
tw9910_reset(client);
ret = tw9910_write_array(client, tw9910_default_regs);
if (ret < 0)
goto tw9910_set_fmt_error;
/*
* set bus width
*/
val = 0x00;
if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
val = LEN;
ret = tw9910_mask_set(client, OPFORM, LEN, val);
if (ret < 0)
goto tw9910_set_fmt_error;
/*
* select MPOUT behavior
*/
switch (priv->info->mpout) {
case TW9910_MPO_VLOSS:
val = RTSEL_VLOSS; break;
case TW9910_MPO_HLOCK:
val = RTSEL_HLOCK; break;
case TW9910_MPO_SLOCK:
val = RTSEL_SLOCK; break;
case TW9910_MPO_VLOCK:
val = RTSEL_VLOCK; break;
case TW9910_MPO_MONO:
val = RTSEL_MONO; break;
case TW9910_MPO_DET50:
val = RTSEL_DET50; break;
case TW9910_MPO_FIELD:
val = RTSEL_FIELD; break;
case TW9910_MPO_RTCO:
val = RTSEL_RTCO; break;
default:
val = 0;
}
ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
if (ret < 0)
goto tw9910_set_fmt_error;
/*
* set scale
*/
ret = tw9910_set_scale(client, priv->scale);
if (ret < 0)
goto tw9910_set_fmt_error;
/*
* set cropping
*/
ret = tw9910_set_cropping(client, &tw9910_cropping_ctrl);
if (ret < 0)
goto tw9910_set_fmt_error;
/*
* set hsync
*/
ret = tw9910_set_hsync(client, &tw9910_hsync_ctrl);
if (ret < 0)
goto tw9910_set_fmt_error;
rect->width = priv->scale->width;
rect->height = priv->scale->height;
rect->left = 0;
rect->top = 0;
return ret;
tw9910_set_fmt_error:
tw9910_reset(client);
priv->scale = NULL;
return ret;
}
static int tw9910_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = sd->priv;
struct tw9910_priv *priv = to_tw9910(client);
if (!priv->scale) {
int ret;
struct v4l2_crop crop = {
.c = {
.left = 0,
.top = 0,
.width = 640,
.height = 480,
},
};
ret = tw9910_s_crop(sd, &crop);
if (ret < 0)
return ret;
}
a->c.left = 0;
a->c.top = 0;
a->c.width = priv->scale->width;
a->c.height = priv->scale->height;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
static int tw9910_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
a->bounds.left = 0;
a->bounds.top = 0;
a->bounds.width = 768;
a->bounds.height = 576;
a->defrect.left = 0;
a->defrect.top = 0;
a->defrect.width = 640;
a->defrect.height = 480;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static int tw9910_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
struct tw9910_priv *priv = to_tw9910(client);
struct v4l2_pix_format *pix = &f->fmt.pix;
if (!priv->scale) {
int ret;
struct v4l2_crop crop = {
.c = {
.left = 0,
.top = 0,
.width = 640,
.height = 480,
},
};
ret = tw9910_s_crop(sd, &crop);
if (ret < 0)
return ret;
}
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
pix->width = priv->scale->width;
pix->height = priv->scale->height;
pix->pixelformat = V4L2_PIX_FMT_VYUY;
pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
pix->field = V4L2_FIELD_INTERLACED;
return 0;
}
static int tw9910_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
struct tw9910_priv *priv = to_tw9910(client);
struct v4l2_pix_format *pix = &f->fmt.pix;
/* See tw9910_s_crop() - no proper cropping support */
struct v4l2_crop a = {
.c = {
.left = 0,
.top = 0,
.width = pix->width,
.height = pix->height,
},
};
int i, ret;
/*
* check color format
*/
for (i = 0; i < ARRAY_SIZE(tw9910_color_fmt); i++)
if (pix->pixelformat == tw9910_color_fmt[i].fourcc)
break;
if (i == ARRAY_SIZE(tw9910_color_fmt))
return -EINVAL;
ret = tw9910_s_crop(sd, &a);
if (!ret) {
pix->width = priv->scale->width;
pix->height = priv->scale->height;
}
return ret;
}
static int tw9910_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
struct soc_camera_device *icd = client->dev.platform_data;
struct v4l2_pix_format *pix = &f->fmt.pix;
const struct tw9910_scale_ctrl *scale;
if (V4L2_FIELD_ANY == pix->field) {
pix->field = V4L2_FIELD_INTERLACED;
} else if (V4L2_FIELD_INTERLACED != pix->field) {
dev_err(&client->dev, "Field type invalid.\n");
return -EINVAL;
}
/*
* select suitable norm
*/
scale = tw9910_select_norm(icd, pix->width, pix->height);
if (!scale)
return -EINVAL;
pix->width = scale->width;
pix->height = scale->height;
return 0;
}
static int tw9910_video_probe(struct soc_camera_device *icd,
struct i2c_client *client)
{
struct tw9910_priv *priv = to_tw9910(client);
s32 val;
/*
* We must have a parent by now. And it cannot be a wrong one.
* So this entire test is completely redundant.
*/
if (!icd->dev.parent ||
to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
return -ENODEV;
/*
* tw9910 only use 8 or 16 bit bus width
*/
if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
SOCAM_DATAWIDTH_8 != priv->info->buswidth) {
dev_err(&client->dev, "bus width error\n");
return -ENODEV;
}
icd->formats = tw9910_color_fmt;
icd->num_formats = ARRAY_SIZE(tw9910_color_fmt);
/*
* check and show Product ID
*/
val = i2c_smbus_read_byte_data(client, ID);
if (0x0B != GET_ID(val) ||
0x00 != GET_ReV(val)) {
dev_err(&client->dev,
"Product ID error %x:%x\n", GET_ID(val), GET_ReV(val));
return -ENODEV;
}
dev_info(&client->dev,
"tw9910 Product ID %0x:%0x\n", GET_ID(val), GET_ReV(val));
icd->vdev->tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL;
icd->vdev->current_norm = V4L2_STD_NTSC;
return 0;
}
static struct soc_camera_ops tw9910_ops = {
.set_bus_param = tw9910_set_bus_param,
.query_bus_param = tw9910_query_bus_param,
.enum_input = tw9910_enum_input,
};
static struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
.g_chip_ident = tw9910_g_chip_ident,
.s_std = tw9910_s_std,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = tw9910_g_register,
.s_register = tw9910_s_register,
#endif
};
static struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
.s_stream = tw9910_s_stream,
.g_fmt = tw9910_g_fmt,
.s_fmt = tw9910_s_fmt,
.try_fmt = tw9910_try_fmt,
.cropcap = tw9910_cropcap,
.g_crop = tw9910_g_crop,
.s_crop = tw9910_s_crop,
};
static struct v4l2_subdev_ops tw9910_subdev_ops = {
.core = &tw9910_subdev_core_ops,
.video = &tw9910_subdev_video_ops,
};
/*
* i2c_driver function
*/
static int tw9910_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct tw9910_priv *priv;
struct tw9910_video_info *info;
struct soc_camera_device *icd = client->dev.platform_data;
struct i2c_adapter *adapter =
to_i2c_adapter(client->dev.parent);
struct soc_camera_link *icl;
int ret;
if (!icd) {
dev_err(&client->dev, "TW9910: missing soc-camera data!\n");
return -EINVAL;
}
icl = to_soc_camera_link(icd);
if (!icl)
return -EINVAL;
info = container_of(icl, struct tw9910_video_info, link);
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev,
"I2C-Adapter doesn't support "
"I2C_FUNC_SMBUS_BYTE_DATA\n");
return -EIO;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->info = info;
v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
icd->ops = &tw9910_ops;
icd->iface = info->link.bus_id;
ret = tw9910_video_probe(icd, client);
if (ret) {
icd->ops = NULL;
i2c_set_clientdata(client, NULL);
kfree(priv);
}
return ret;
}
static int tw9910_remove(struct i2c_client *client)
{
struct tw9910_priv *priv = to_tw9910(client);
struct soc_camera_device *icd = client->dev.platform_data;
icd->ops = NULL;
i2c_set_clientdata(client, NULL);
kfree(priv);
return 0;
}
static const struct i2c_device_id tw9910_id[] = {
{ "tw9910", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tw9910_id);
static struct i2c_driver tw9910_i2c_driver = {
.driver = {
.name = "tw9910",
},
.probe = tw9910_probe,
.remove = tw9910_remove,
.id_table = tw9910_id,
};
/*
* module function
*/
static int __init tw9910_module_init(void)
{
return i2c_add_driver(&tw9910_i2c_driver);
}
static void __exit tw9910_module_exit(void)
{
i2c_del_driver(&tw9910_i2c_driver);
}
module_init(tw9910_module_init);
module_exit(tw9910_module_exit);
MODULE_DESCRIPTION("SoC Camera driver for tw9910");
MODULE_AUTHOR("Kuninori Morimoto");
MODULE_LICENSE("GPL v2");
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