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linuxdebug/drivers/media/i2c/tw9910.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* tw9910 Video Driver
*
* Copyright (C) 2017 Jacopo Mondi <jacopo+renesas@jmondi.org>
*
* 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>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>
#include <media/i2c/tw9910.h>
#include <media/v4l2-subdev.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 HSBEGIN 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_TRI_SEL_MASK 0x07
#define OEN_TRI_SEL_ALL_ON 0x00 /* Enable output for Rev0/Rev1 */
#define OEN_TRI_SEL_ALL_OFF_r0 0x06 /* All tri-stated for Rev0 */
#define OEN_TRI_SEL_ALL_OFF_r1 0x07 /* All tri-stated for Rev1 */
/* 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.
*/
#define ACNTL1_PDN_MASK 0x0e
#define CLK_PDN 0x08 /* system clock power down */
#define Y_PDN 0x04 /* Luma ADC power down */
#define C_PDN 0x02 /* Chroma ADC power down */
/* ACNTL2 */
#define ACNTL2_PDN_MASK 0x40
#define PLL_PDN 0x40 /* PLL power down */
/* 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 ) */
/* HSYNC start and end are constant for now */
#define HSYNC_START 0x0260
#define HSYNC_END 0x0300
/*
* 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_priv {
struct v4l2_subdev subdev;
struct clk *clk;
struct tw9910_video_info *info;
struct gpio_desc *pdn_gpio;
struct gpio_desc *rstb_gpio;
const struct tw9910_scale_ctrl *scale;
v4l2_std_id norm;
u32 revision;
};
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,
},
};
/*
* 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_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 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_hsync(struct i2c_client *client)
{
struct tw9910_priv *priv = to_tw9910(client);
int ret;
/* bit 10 - 3 */
ret = i2c_smbus_write_byte_data(client, HSBEGIN,
(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;
/* So far only revisions 0 and 1 have been seen. */
/* bit 2 - 0 */
if (priv->revision == 1)
ret = tw9910_mask_set(client, HSLOWCTL, 0x77,
(HSYNC_START & 0x0007) << 4 |
(HSYNC_END & 0x0007));
return ret;
}
static void tw9910_reset(struct i2c_client *client)
{
tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
usleep_range(1000, 5000);
}
static int tw9910_power(struct i2c_client *client, int enable)
{
int ret;
u8 acntl1;
u8 acntl2;
if (enable) {
acntl1 = 0;
acntl2 = 0;
} else {
acntl1 = CLK_PDN | Y_PDN | C_PDN;
acntl2 = PLL_PDN;
}
ret = tw9910_mask_set(client, ACNTL1, ACNTL1_PDN_MASK, acntl1);
if (ret < 0)
return ret;
return tw9910_mask_set(client, ACNTL2, ACNTL2_PDN_MASK, acntl2);
}
static const struct tw9910_scale_ctrl *tw9910_select_norm(v4l2_std_id norm,
u32 width, u32 height)
{
const struct tw9910_scale_ctrl *scale;
const struct tw9910_scale_ctrl *ret = NULL;
__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;
}
/*
* subdevice operations
*/
static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
u8 val;
int ret;
if (!enable) {
switch (priv->revision) {
case 0:
val = OEN_TRI_SEL_ALL_OFF_r0;
break;
case 1:
val = OEN_TRI_SEL_ALL_OFF_r1;
break;
default:
dev_err(&client->dev, "un-supported revision\n");
return -EINVAL;
}
} else {
val = OEN_TRI_SEL_ALL_ON;
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);
}
ret = tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
if (ret < 0)
return ret;
return tw9910_power(client, enable);
}
static int tw9910_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
*norm = priv->norm;
return 0;
}
static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
const unsigned int hact = 720;
const unsigned int hdelay = 15;
unsigned int vact;
unsigned int vdelay;
int ret;
if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
return -EINVAL;
priv->norm = norm;
if (norm & V4L2_STD_525_60) {
vact = 240;
vdelay = 18;
ret = tw9910_mask_set(client, VVBI, 0x10, 0x10);
} else {
vact = 288;
vdelay = 24;
ret = tw9910_mask_set(client, VVBI, 0x10, 0x00);
}
if (!ret)
ret = i2c_smbus_write_byte_data(client, CROP_HI,
((vdelay >> 2) & 0xc0) |
((vact >> 4) & 0x30) |
((hdelay >> 6) & 0x0c) |
((hact >> 8) & 0x03));
if (!ret)
ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
vdelay & 0xff);
if (!ret)
ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
vact & 0xff);
return ret;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int tw9910_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
if (reg->reg > 0xff)
return -EINVAL;
reg->size = 1;
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,
const struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
if (reg->reg > 0xff ||
reg->val > 0xff)
return -EINVAL;
return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
}
#endif
static void tw9910_set_gpio_value(struct gpio_desc *desc, int value)
{
if (desc) {
gpiod_set_value(desc, value);
usleep_range(500, 1000);
}
}
static int tw9910_power_on(struct tw9910_priv *priv)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
int ret;
if (priv->clk) {
ret = clk_prepare_enable(priv->clk);
if (ret)
return ret;
}
tw9910_set_gpio_value(priv->pdn_gpio, 0);
/*
* FIXME: The reset signal is connected to a shared GPIO on some
* platforms (namely the SuperH Migo-R). Until a framework becomes
* available to handle this cleanly, request the GPIO temporarily
* to avoid conflicts.
*/
priv->rstb_gpio = gpiod_get_optional(&client->dev, "rstb",
GPIOD_OUT_LOW);
if (IS_ERR(priv->rstb_gpio)) {
dev_info(&client->dev, "Unable to get GPIO \"rstb\"");
clk_disable_unprepare(priv->clk);
tw9910_set_gpio_value(priv->pdn_gpio, 1);
return PTR_ERR(priv->rstb_gpio);
}
if (priv->rstb_gpio) {
tw9910_set_gpio_value(priv->rstb_gpio, 1);
tw9910_set_gpio_value(priv->rstb_gpio, 0);
gpiod_put(priv->rstb_gpio);
}
return 0;
}
static int tw9910_power_off(struct tw9910_priv *priv)
{
clk_disable_unprepare(priv->clk);
tw9910_set_gpio_value(priv->pdn_gpio, 1);
return 0;
}
static int tw9910_s_power(struct v4l2_subdev *sd, int on)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
return on ? tw9910_power_on(priv) : tw9910_power_off(priv);
}
static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
int ret = -EINVAL;
u8 val;
/* Select suitable norm. */
priv->scale = tw9910_select_norm(priv->norm, *width, *height);
if (!priv->scale)
goto tw9910_set_fmt_error;
/* Reset hardware. */
tw9910_reset(client);
/* Set bus width. */
val = 0x00;
if (priv->info->buswidth == 16)
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 hsync. */
ret = tw9910_set_hsync(client);
if (ret < 0)
goto tw9910_set_fmt_error;
*width = priv->scale->width;
*height = priv->scale->height;
return ret;
tw9910_set_fmt_error:
tw9910_reset(client);
priv->scale = NULL;
return ret;
}
static int tw9910_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
/* Only CROP, CROP_DEFAULT and CROP_BOUNDS are supported. */
if (sel->target > V4L2_SEL_TGT_CROP_BOUNDS)
return -EINVAL;
sel->r.left = 0;
sel->r.top = 0;
if (priv->norm & V4L2_STD_NTSC) {
sel->r.width = 640;
sel->r.height = 480;
} else {
sel->r.width = 768;
sel->r.height = 576;
}
return 0;
}
static int tw9910_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *mf = &format->format;
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
if (format->pad)
return -EINVAL;
if (!priv->scale) {
priv->scale = tw9910_select_norm(priv->norm, 640, 480);
if (!priv->scale)
return -EINVAL;
}
mf->width = priv->scale->width;
mf->height = priv->scale->height;
mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
mf->field = V4L2_FIELD_INTERLACED_BT;
return 0;
}
static int tw9910_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
u32 width = mf->width, height = mf->height;
int ret;
WARN_ON(mf->field != V4L2_FIELD_ANY &&
mf->field != V4L2_FIELD_INTERLACED_BT);
/* Check color format. */
if (mf->code != MEDIA_BUS_FMT_UYVY8_2X8)
return -EINVAL;
mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
ret = tw9910_set_frame(sd, &width, &height);
if (ret)
return ret;
mf->width = width;
mf->height = height;
return 0;
}
static int tw9910_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *mf = &format->format;
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct tw9910_priv *priv = to_tw9910(client);
const struct tw9910_scale_ctrl *scale;
if (format->pad)
return -EINVAL;
if (mf->field == V4L2_FIELD_ANY) {
mf->field = V4L2_FIELD_INTERLACED_BT;
} else if (mf->field != V4L2_FIELD_INTERLACED_BT) {
dev_err(&client->dev, "Field type %d invalid\n", mf->field);
return -EINVAL;
}
mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
/* Select suitable norm. */
scale = tw9910_select_norm(priv->norm, mf->width, mf->height);
if (!scale)
return -EINVAL;
mf->width = scale->width;
mf->height = scale->height;
if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
return tw9910_s_fmt(sd, mf);
sd_state->pads->try_fmt = *mf;
return 0;
}
static int tw9910_video_probe(struct i2c_client *client)
{
struct tw9910_priv *priv = to_tw9910(client);
s32 id;
int ret;
/* TW9910 only use 8 or 16 bit bus width. */
if (priv->info->buswidth != 16 && priv->info->buswidth != 8) {
dev_err(&client->dev, "bus width error\n");
return -ENODEV;
}
ret = tw9910_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/*
* Check and show Product ID.
* So far only revisions 0 and 1 have been seen.
*/
id = i2c_smbus_read_byte_data(client, ID);
priv->revision = GET_REV(id);
id = GET_ID(id);
if (id != 0x0b || priv->revision > 0x01) {
dev_err(&client->dev, "Product ID error %x:%x\n",
id, priv->revision);
ret = -ENODEV;
goto done;
}
dev_info(&client->dev, "tw9910 Product ID %0x:%0x\n",
id, priv->revision);
priv->norm = V4L2_STD_NTSC;
priv->scale = &tw9910_ntsc_scales[0];
done:
tw9910_s_power(&priv->subdev, 0);
return ret;
}
static const struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = tw9910_g_register,
.s_register = tw9910_s_register,
#endif
.s_power = tw9910_s_power,
};
static int tw9910_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->pad || code->index)
return -EINVAL;
code->code = MEDIA_BUS_FMT_UYVY8_2X8;
return 0;
}
static int tw9910_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
{
*norm = V4L2_STD_NTSC | V4L2_STD_PAL;
return 0;
}
static const struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
.s_std = tw9910_s_std,
.g_std = tw9910_g_std,
.s_stream = tw9910_s_stream,
.g_tvnorms = tw9910_g_tvnorms,
};
static const struct v4l2_subdev_pad_ops tw9910_subdev_pad_ops = {
.enum_mbus_code = tw9910_enum_mbus_code,
.get_selection = tw9910_get_selection,
.get_fmt = tw9910_get_fmt,
.set_fmt = tw9910_set_fmt,
};
static const struct v4l2_subdev_ops tw9910_subdev_ops = {
.core = &tw9910_subdev_core_ops,
.video = &tw9910_subdev_video_ops,
.pad = &tw9910_subdev_pad_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 i2c_adapter *adapter = client->adapter;
int ret;
if (!client->dev.platform_data) {
dev_err(&client->dev, "TW9910: missing platform data!\n");
return -EINVAL;
}
info = client->dev.platform_data;
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 = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->info = info;
v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
priv->clk = clk_get(&client->dev, "xti");
if (PTR_ERR(priv->clk) == -ENOENT) {
priv->clk = NULL;
} else if (IS_ERR(priv->clk)) {
dev_err(&client->dev, "Unable to get xti clock\n");
return PTR_ERR(priv->clk);
}
priv->pdn_gpio = gpiod_get_optional(&client->dev, "pdn",
GPIOD_OUT_HIGH);
if (IS_ERR(priv->pdn_gpio)) {
dev_info(&client->dev, "Unable to get GPIO \"pdn\"");
ret = PTR_ERR(priv->pdn_gpio);
goto error_clk_put;
}
ret = tw9910_video_probe(client);
if (ret < 0)
goto error_gpio_put;
ret = v4l2_async_register_subdev(&priv->subdev);
if (ret)
goto error_gpio_put;
return ret;
error_gpio_put:
if (priv->pdn_gpio)
gpiod_put(priv->pdn_gpio);
error_clk_put:
clk_put(priv->clk);
return ret;
}
static void tw9910_remove(struct i2c_client *client)
{
struct tw9910_priv *priv = to_tw9910(client);
if (priv->pdn_gpio)
gpiod_put(priv->pdn_gpio);
clk_put(priv->clk);
v4l2_async_unregister_subdev(&priv->subdev);
}
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_i2c_driver(tw9910_i2c_driver);
MODULE_DESCRIPTION("V4L2 driver for TW9910 video decoder");
MODULE_AUTHOR("Kuninori Morimoto");
MODULE_LICENSE("GPL v2");