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linuxdebug/drivers/media/i2c/ov2740.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Intel Corporation.
#include <asm/unaligned.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/nvmem-provider.h>
#include <linux/regmap.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#define OV2740_LINK_FREQ_360MHZ 360000000ULL
#define OV2740_SCLK 72000000LL
#define OV2740_MCLK 19200000
#define OV2740_DATA_LANES 2
#define OV2740_RGB_DEPTH 10
#define OV2740_REG_CHIP_ID 0x300a
#define OV2740_CHIP_ID 0x2740
#define OV2740_REG_MODE_SELECT 0x0100
#define OV2740_MODE_STANDBY 0x00
#define OV2740_MODE_STREAMING 0x01
/* vertical-timings from sensor */
#define OV2740_REG_VTS 0x380e
#define OV2740_VTS_DEF 0x088a
#define OV2740_VTS_MIN 0x0460
#define OV2740_VTS_MAX 0x7fff
/* horizontal-timings from sensor */
#define OV2740_REG_HTS 0x380c
/* Exposure controls from sensor */
#define OV2740_REG_EXPOSURE 0x3500
#define OV2740_EXPOSURE_MIN 4
#define OV2740_EXPOSURE_MAX_MARGIN 8
#define OV2740_EXPOSURE_STEP 1
/* Analog gain controls from sensor */
#define OV2740_REG_ANALOG_GAIN 0x3508
#define OV2740_ANAL_GAIN_MIN 128
#define OV2740_ANAL_GAIN_MAX 1983
#define OV2740_ANAL_GAIN_STEP 1
/* Digital gain controls from sensor */
#define OV2740_REG_MWB_R_GAIN 0x500a
#define OV2740_REG_MWB_G_GAIN 0x500c
#define OV2740_REG_MWB_B_GAIN 0x500e
#define OV2740_DGTL_GAIN_MIN 1024
#define OV2740_DGTL_GAIN_MAX 4095
#define OV2740_DGTL_GAIN_STEP 1
#define OV2740_DGTL_GAIN_DEFAULT 1024
/* Test Pattern Control */
#define OV2740_REG_TEST_PATTERN 0x5040
#define OV2740_TEST_PATTERN_ENABLE BIT(7)
#define OV2740_TEST_PATTERN_BAR_SHIFT 2
/* Group Access */
#define OV2740_REG_GROUP_ACCESS 0x3208
#define OV2740_GROUP_HOLD_START 0x0
#define OV2740_GROUP_HOLD_END 0x10
#define OV2740_GROUP_HOLD_LAUNCH 0xa0
/* ISP CTRL00 */
#define OV2740_REG_ISP_CTRL00 0x5000
/* ISP CTRL01 */
#define OV2740_REG_ISP_CTRL01 0x5001
/* Customer Addresses: 0x7010 - 0x710F */
#define CUSTOMER_USE_OTP_SIZE 0x100
/* OTP registers from sensor */
#define OV2740_REG_OTP_CUSTOMER 0x7010
struct nvm_data {
struct i2c_client *client;
struct nvmem_device *nvmem;
struct regmap *regmap;
char *nvm_buffer;
};
enum {
OV2740_LINK_FREQ_360MHZ_INDEX,
};
struct ov2740_reg {
u16 address;
u8 val;
};
struct ov2740_reg_list {
u32 num_of_regs;
const struct ov2740_reg *regs;
};
struct ov2740_link_freq_config {
const struct ov2740_reg_list reg_list;
};
struct ov2740_mode {
/* Frame width in pixels */
u32 width;
/* Frame height in pixels */
u32 height;
/* Horizontal timining size */
u32 hts;
/* Default vertical timining size */
u32 vts_def;
/* Min vertical timining size */
u32 vts_min;
/* Link frequency needed for this resolution */
u32 link_freq_index;
/* Sensor register settings for this resolution */
const struct ov2740_reg_list reg_list;
};
static const struct ov2740_reg mipi_data_rate_720mbps[] = {
{0x0103, 0x01},
{0x0302, 0x4b},
{0x030d, 0x4b},
{0x030e, 0x02},
{0x030a, 0x01},
{0x0312, 0x11},
};
static const struct ov2740_reg mode_1932x1092_regs[] = {
{0x3000, 0x00},
{0x3018, 0x32},
{0x3031, 0x0a},
{0x3080, 0x08},
{0x3083, 0xB4},
{0x3103, 0x00},
{0x3104, 0x01},
{0x3106, 0x01},
{0x3500, 0x00},
{0x3501, 0x44},
{0x3502, 0x40},
{0x3503, 0x88},
{0x3507, 0x00},
{0x3508, 0x00},
{0x3509, 0x80},
{0x350c, 0x00},
{0x350d, 0x80},
{0x3510, 0x00},
{0x3511, 0x00},
{0x3512, 0x20},
{0x3632, 0x00},
{0x3633, 0x10},
{0x3634, 0x10},
{0x3635, 0x10},
{0x3645, 0x13},
{0x3646, 0x81},
{0x3636, 0x10},
{0x3651, 0x0a},
{0x3656, 0x02},
{0x3659, 0x04},
{0x365a, 0xda},
{0x365b, 0xa2},
{0x365c, 0x04},
{0x365d, 0x1d},
{0x365e, 0x1a},
{0x3662, 0xd7},
{0x3667, 0x78},
{0x3669, 0x0a},
{0x366a, 0x92},
{0x3700, 0x54},
{0x3702, 0x10},
{0x3706, 0x42},
{0x3709, 0x30},
{0x370b, 0xc2},
{0x3714, 0x63},
{0x3715, 0x01},
{0x3716, 0x00},
{0x371a, 0x3e},
{0x3732, 0x0e},
{0x3733, 0x10},
{0x375f, 0x0e},
{0x3768, 0x30},
{0x3769, 0x44},
{0x376a, 0x22},
{0x377b, 0x20},
{0x377c, 0x00},
{0x377d, 0x0c},
{0x3798, 0x00},
{0x37a1, 0x55},
{0x37a8, 0x6d},
{0x37c2, 0x04},
{0x37c5, 0x00},
{0x37c8, 0x00},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x07},
{0x3805, 0x8f},
{0x3806, 0x04},
{0x3807, 0x47},
{0x3808, 0x07},
{0x3809, 0x88},
{0x380a, 0x04},
{0x380b, 0x40},
{0x380c, 0x04},
{0x380d, 0x38},
{0x380e, 0x04},
{0x380f, 0x60},
{0x3810, 0x00},
{0x3811, 0x04},
{0x3812, 0x00},
{0x3813, 0x04},
{0x3814, 0x01},
{0x3815, 0x01},
{0x3820, 0x80},
{0x3821, 0x46},
{0x3822, 0x84},
{0x3829, 0x00},
{0x382a, 0x01},
{0x382b, 0x01},
{0x3830, 0x04},
{0x3836, 0x01},
{0x3837, 0x08},
{0x3839, 0x01},
{0x383a, 0x00},
{0x383b, 0x08},
{0x383c, 0x00},
{0x3f0b, 0x00},
{0x4001, 0x20},
{0x4009, 0x07},
{0x4003, 0x10},
{0x4010, 0xe0},
{0x4016, 0x00},
{0x4017, 0x10},
{0x4044, 0x02},
{0x4304, 0x08},
{0x4307, 0x30},
{0x4320, 0x80},
{0x4322, 0x00},
{0x4323, 0x00},
{0x4324, 0x00},
{0x4325, 0x00},
{0x4326, 0x00},
{0x4327, 0x00},
{0x4328, 0x00},
{0x4329, 0x00},
{0x432c, 0x03},
{0x432d, 0x81},
{0x4501, 0x84},
{0x4502, 0x40},
{0x4503, 0x18},
{0x4504, 0x04},
{0x4508, 0x02},
{0x4601, 0x10},
{0x4800, 0x00},
{0x4816, 0x52},
{0x4837, 0x16},
{0x5000, 0x7f},
{0x5001, 0x00},
{0x5005, 0x38},
{0x501e, 0x0d},
{0x5040, 0x00},
{0x5901, 0x00},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x07},
{0x3805, 0x8f},
{0x3806, 0x04},
{0x3807, 0x47},
{0x3808, 0x07},
{0x3809, 0x8c},
{0x380a, 0x04},
{0x380b, 0x44},
{0x3810, 0x00},
{0x3811, 0x00},
{0x3812, 0x00},
{0x3813, 0x01},
};
static const char * const ov2740_test_pattern_menu[] = {
"Disabled",
"Color Bar",
"Top-Bottom Darker Color Bar",
"Right-Left Darker Color Bar",
"Bottom-Top Darker Color Bar",
};
static const s64 link_freq_menu_items[] = {
OV2740_LINK_FREQ_360MHZ,
};
static const struct ov2740_link_freq_config link_freq_configs[] = {
[OV2740_LINK_FREQ_360MHZ_INDEX] = {
.reg_list = {
.num_of_regs = ARRAY_SIZE(mipi_data_rate_720mbps),
.regs = mipi_data_rate_720mbps,
}
},
};
static const struct ov2740_mode supported_modes[] = {
{
.width = 1932,
.height = 1092,
.hts = 1080,
.vts_def = OV2740_VTS_DEF,
.vts_min = OV2740_VTS_MIN,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_1932x1092_regs),
.regs = mode_1932x1092_regs,
},
.link_freq_index = OV2740_LINK_FREQ_360MHZ_INDEX,
},
};
struct ov2740 {
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_ctrl_handler ctrl_handler;
/* V4L2 Controls */
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *exposure;
/* Current mode */
const struct ov2740_mode *cur_mode;
/* To serialize asynchronus callbacks */
struct mutex mutex;
/* Streaming on/off */
bool streaming;
/* NVM data inforamtion */
struct nvm_data *nvm;
/* True if the device has been identified */
bool identified;
};
static inline struct ov2740 *to_ov2740(struct v4l2_subdev *subdev)
{
return container_of(subdev, struct ov2740, sd);
}
static u64 to_pixel_rate(u32 f_index)
{
u64 pixel_rate = link_freq_menu_items[f_index] * 2 * OV2740_DATA_LANES;
do_div(pixel_rate, OV2740_RGB_DEPTH);
return pixel_rate;
}
static u64 to_pixels_per_line(u32 hts, u32 f_index)
{
u64 ppl = hts * to_pixel_rate(f_index);
do_div(ppl, OV2740_SCLK);
return ppl;
}
static int ov2740_read_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 *val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
struct i2c_msg msgs[2];
u8 addr_buf[2];
u8 data_buf[4] = {0};
int ret = 0;
if (len > sizeof(data_buf))
return -EINVAL;
put_unaligned_be16(reg, addr_buf);
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = sizeof(addr_buf);
msgs[0].buf = addr_buf;
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = len;
msgs[1].buf = &data_buf[sizeof(data_buf) - len];
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs))
return ret < 0 ? ret : -EIO;
*val = get_unaligned_be32(data_buf);
return 0;
}
static int ov2740_write_reg(struct ov2740 *ov2740, u16 reg, u16 len, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
u8 buf[6];
int ret = 0;
if (len > 4)
return -EINVAL;
put_unaligned_be16(reg, buf);
put_unaligned_be32(val << 8 * (4 - len), buf + 2);
ret = i2c_master_send(client, buf, len + 2);
if (ret != len + 2)
return ret < 0 ? ret : -EIO;
return 0;
}
static int ov2740_write_reg_list(struct ov2740 *ov2740,
const struct ov2740_reg_list *r_list)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
unsigned int i;
int ret = 0;
for (i = 0; i < r_list->num_of_regs; i++) {
ret = ov2740_write_reg(ov2740, r_list->regs[i].address, 1,
r_list->regs[i].val);
if (ret) {
dev_err_ratelimited(&client->dev,
"write reg 0x%4.4x return err = %d",
r_list->regs[i].address, ret);
return ret;
}
}
return 0;
}
static int ov2740_identify_module(struct ov2740 *ov2740)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
int ret;
u32 val;
if (ov2740->identified)
return 0;
ret = ov2740_read_reg(ov2740, OV2740_REG_CHIP_ID, 3, &val);
if (ret)
return ret;
if (val != OV2740_CHIP_ID) {
dev_err(&client->dev, "chip id mismatch: %x!=%x",
OV2740_CHIP_ID, val);
return -ENXIO;
}
ov2740->identified = true;
return 0;
}
static int ov2740_update_digital_gain(struct ov2740 *ov2740, u32 d_gain)
{
int ret = 0;
ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
OV2740_GROUP_HOLD_START);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_R_GAIN, 2, d_gain);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_G_GAIN, 2, d_gain);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MWB_B_GAIN, 2, d_gain);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
OV2740_GROUP_HOLD_END);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_GROUP_ACCESS, 1,
OV2740_GROUP_HOLD_LAUNCH);
return ret;
}
static int ov2740_test_pattern(struct ov2740 *ov2740, u32 pattern)
{
if (pattern)
pattern = (pattern - 1) << OV2740_TEST_PATTERN_BAR_SHIFT |
OV2740_TEST_PATTERN_ENABLE;
return ov2740_write_reg(ov2740, OV2740_REG_TEST_PATTERN, 1, pattern);
}
static int ov2740_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov2740 *ov2740 = container_of(ctrl->handler,
struct ov2740, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
s64 exposure_max;
int ret = 0;
/* Propagate change of current control to all related controls */
if (ctrl->id == V4L2_CID_VBLANK) {
/* Update max exposure while meeting expected vblanking */
exposure_max = ov2740->cur_mode->height + ctrl->val -
OV2740_EXPOSURE_MAX_MARGIN;
__v4l2_ctrl_modify_range(ov2740->exposure,
ov2740->exposure->minimum,
exposure_max, ov2740->exposure->step,
exposure_max);
}
/* V4L2 controls values will be applied only when power is already up */
if (!pm_runtime_get_if_in_use(&client->dev))
return 0;
switch (ctrl->id) {
case V4L2_CID_ANALOGUE_GAIN:
ret = ov2740_write_reg(ov2740, OV2740_REG_ANALOG_GAIN, 2,
ctrl->val);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = ov2740_update_digital_gain(ov2740, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
/* 4 least significant bits of expsoure are fractional part */
ret = ov2740_write_reg(ov2740, OV2740_REG_EXPOSURE, 3,
ctrl->val << 4);
break;
case V4L2_CID_VBLANK:
ret = ov2740_write_reg(ov2740, OV2740_REG_VTS, 2,
ov2740->cur_mode->height + ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov2740_test_pattern(ov2740, ctrl->val);
break;
default:
ret = -EINVAL;
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov2740_ctrl_ops = {
.s_ctrl = ov2740_set_ctrl,
};
static int ov2740_init_controls(struct ov2740 *ov2740)
{
struct v4l2_ctrl_handler *ctrl_hdlr;
const struct ov2740_mode *cur_mode;
s64 exposure_max, h_blank, pixel_rate;
u32 vblank_min, vblank_max, vblank_default;
int size;
int ret = 0;
ctrl_hdlr = &ov2740->ctrl_handler;
ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
if (ret)
return ret;
ctrl_hdlr->lock = &ov2740->mutex;
cur_mode = ov2740->cur_mode;
size = ARRAY_SIZE(link_freq_menu_items);
ov2740->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_LINK_FREQ,
size - 1, 0,
link_freq_menu_items);
if (ov2740->link_freq)
ov2740->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
pixel_rate = to_pixel_rate(OV2740_LINK_FREQ_360MHZ_INDEX);
ov2740->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_PIXEL_RATE, 0,
pixel_rate, 1, pixel_rate);
vblank_min = cur_mode->vts_min - cur_mode->height;
vblank_max = OV2740_VTS_MAX - cur_mode->height;
vblank_default = cur_mode->vts_def - cur_mode->height;
ov2740->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_VBLANK, vblank_min,
vblank_max, 1, vblank_default);
h_blank = to_pixels_per_line(cur_mode->hts, cur_mode->link_freq_index);
h_blank -= cur_mode->width;
ov2740->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_HBLANK, h_blank, h_blank, 1,
h_blank);
if (ov2740->hblank)
ov2740->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
OV2740_ANAL_GAIN_MIN, OV2740_ANAL_GAIN_MAX,
OV2740_ANAL_GAIN_STEP, OV2740_ANAL_GAIN_MIN);
v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
OV2740_DGTL_GAIN_MIN, OV2740_DGTL_GAIN_MAX,
OV2740_DGTL_GAIN_STEP, OV2740_DGTL_GAIN_DEFAULT);
exposure_max = cur_mode->vts_def - OV2740_EXPOSURE_MAX_MARGIN;
ov2740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_EXPOSURE,
OV2740_EXPOSURE_MIN, exposure_max,
OV2740_EXPOSURE_STEP,
exposure_max);
v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov2740_test_pattern_menu) - 1,
0, 0, ov2740_test_pattern_menu);
if (ctrl_hdlr->error) {
v4l2_ctrl_handler_free(ctrl_hdlr);
return ctrl_hdlr->error;
}
ov2740->sd.ctrl_handler = ctrl_hdlr;
return 0;
}
static void ov2740_update_pad_format(const struct ov2740_mode *mode,
struct v4l2_mbus_framefmt *fmt)
{
fmt->width = mode->width;
fmt->height = mode->height;
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
fmt->field = V4L2_FIELD_NONE;
}
static int ov2740_load_otp_data(struct nvm_data *nvm)
{
struct i2c_client *client;
struct ov2740 *ov2740;
u32 isp_ctrl00 = 0;
u32 isp_ctrl01 = 0;
int ret;
if (!nvm)
return -EINVAL;
if (nvm->nvm_buffer)
return 0;
client = nvm->client;
ov2740 = to_ov2740(i2c_get_clientdata(client));
nvm->nvm_buffer = kzalloc(CUSTOMER_USE_OTP_SIZE, GFP_KERNEL);
if (!nvm->nvm_buffer)
return -ENOMEM;
ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, &isp_ctrl00);
if (ret) {
dev_err(&client->dev, "failed to read ISP CTRL00\n");
goto err;
}
ret = ov2740_read_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, &isp_ctrl01);
if (ret) {
dev_err(&client->dev, "failed to read ISP CTRL01\n");
goto err;
}
/* Clear bit 5 of ISP CTRL00 */
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1,
isp_ctrl00 & ~BIT(5));
if (ret) {
dev_err(&client->dev, "failed to set ISP CTRL00\n");
goto err;
}
/* Clear bit 7 of ISP CTRL01 */
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1,
isp_ctrl01 & ~BIT(7));
if (ret) {
dev_err(&client->dev, "failed to set ISP CTRL01\n");
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STREAMING);
if (ret) {
dev_err(&client->dev, "failed to set streaming mode\n");
goto err;
}
/*
* Users are not allowed to access OTP-related registers and memory
* during the 20 ms period after streaming starts (0x100 = 0x01).
*/
msleep(20);
ret = regmap_bulk_read(nvm->regmap, OV2740_REG_OTP_CUSTOMER,
nvm->nvm_buffer, CUSTOMER_USE_OTP_SIZE);
if (ret) {
dev_err(&client->dev, "failed to read OTP data, ret %d\n", ret);
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STANDBY);
if (ret) {
dev_err(&client->dev, "failed to set streaming mode\n");
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL01, 1, isp_ctrl01);
if (ret) {
dev_err(&client->dev, "failed to set ISP CTRL01\n");
goto err;
}
ret = ov2740_write_reg(ov2740, OV2740_REG_ISP_CTRL00, 1, isp_ctrl00);
if (ret) {
dev_err(&client->dev, "failed to set ISP CTRL00\n");
goto err;
}
return 0;
err:
kfree(nvm->nvm_buffer);
nvm->nvm_buffer = NULL;
return ret;
}
static int ov2740_start_streaming(struct ov2740 *ov2740)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
struct nvm_data *nvm = ov2740->nvm;
const struct ov2740_reg_list *reg_list;
int link_freq_index;
int ret = 0;
ret = ov2740_identify_module(ov2740);
if (ret)
return ret;
ov2740_load_otp_data(nvm);
link_freq_index = ov2740->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = ov2740_write_reg_list(ov2740, reg_list);
if (ret) {
dev_err(&client->dev, "failed to set plls");
return ret;
}
reg_list = &ov2740->cur_mode->reg_list;
ret = ov2740_write_reg_list(ov2740, reg_list);
if (ret) {
dev_err(&client->dev, "failed to set mode");
return ret;
}
ret = __v4l2_ctrl_handler_setup(ov2740->sd.ctrl_handler);
if (ret)
return ret;
ret = ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STREAMING);
if (ret)
dev_err(&client->dev, "failed to start streaming");
return ret;
}
static void ov2740_stop_streaming(struct ov2740 *ov2740)
{
struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
if (ov2740_write_reg(ov2740, OV2740_REG_MODE_SELECT, 1,
OV2740_MODE_STANDBY))
dev_err(&client->dev, "failed to stop streaming");
}
static int ov2740_set_stream(struct v4l2_subdev *sd, int enable)
{
struct ov2740 *ov2740 = to_ov2740(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
if (ov2740->streaming == enable)
return 0;
mutex_lock(&ov2740->mutex);
if (enable) {
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0) {
mutex_unlock(&ov2740->mutex);
return ret;
}
ret = ov2740_start_streaming(ov2740);
if (ret) {
enable = 0;
ov2740_stop_streaming(ov2740);
pm_runtime_put(&client->dev);
}
} else {
ov2740_stop_streaming(ov2740);
pm_runtime_put(&client->dev);
}
ov2740->streaming = enable;
mutex_unlock(&ov2740->mutex);
return ret;
}
static int __maybe_unused ov2740_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov2740 *ov2740 = to_ov2740(sd);
mutex_lock(&ov2740->mutex);
if (ov2740->streaming)
ov2740_stop_streaming(ov2740);
mutex_unlock(&ov2740->mutex);
return 0;
}
static int __maybe_unused ov2740_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct ov2740 *ov2740 = to_ov2740(sd);
int ret = 0;
mutex_lock(&ov2740->mutex);
if (!ov2740->streaming)
goto exit;
ret = ov2740_start_streaming(ov2740);
if (ret) {
ov2740->streaming = false;
ov2740_stop_streaming(ov2740);
}
exit:
mutex_unlock(&ov2740->mutex);
return ret;
}
static int ov2740_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov2740 *ov2740 = to_ov2740(sd);
const struct ov2740_mode *mode;
s32 vblank_def, h_blank;
mode = v4l2_find_nearest_size(supported_modes,
ARRAY_SIZE(supported_modes), width,
height, fmt->format.width,
fmt->format.height);
mutex_lock(&ov2740->mutex);
ov2740_update_pad_format(mode, &fmt->format);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
*v4l2_subdev_get_try_format(sd, sd_state, fmt->pad) = fmt->format;
} else {
ov2740->cur_mode = mode;
__v4l2_ctrl_s_ctrl(ov2740->link_freq, mode->link_freq_index);
__v4l2_ctrl_s_ctrl_int64(ov2740->pixel_rate,
to_pixel_rate(mode->link_freq_index));
/* Update limits and set FPS to default */
vblank_def = mode->vts_def - mode->height;
__v4l2_ctrl_modify_range(ov2740->vblank,
mode->vts_min - mode->height,
OV2740_VTS_MAX - mode->height, 1,
vblank_def);
__v4l2_ctrl_s_ctrl(ov2740->vblank, vblank_def);
h_blank = to_pixels_per_line(mode->hts, mode->link_freq_index) -
mode->width;
__v4l2_ctrl_modify_range(ov2740->hblank, h_blank, h_blank, 1,
h_blank);
}
mutex_unlock(&ov2740->mutex);
return 0;
}
static int ov2740_get_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct ov2740 *ov2740 = to_ov2740(sd);
mutex_lock(&ov2740->mutex);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
fmt->format = *v4l2_subdev_get_try_format(&ov2740->sd,
sd_state,
fmt->pad);
else
ov2740_update_pad_format(ov2740->cur_mode, &fmt->format);
mutex_unlock(&ov2740->mutex);
return 0;
}
static int ov2740_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index > 0)
return -EINVAL;
code->code = MEDIA_BUS_FMT_SGRBG10_1X10;
return 0;
}
static int ov2740_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10)
return -EINVAL;
fse->min_width = supported_modes[fse->index].width;
fse->max_width = fse->min_width;
fse->min_height = supported_modes[fse->index].height;
fse->max_height = fse->min_height;
return 0;
}
static int ov2740_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct ov2740 *ov2740 = to_ov2740(sd);
mutex_lock(&ov2740->mutex);
ov2740_update_pad_format(&supported_modes[0],
v4l2_subdev_get_try_format(sd, fh->state, 0));
mutex_unlock(&ov2740->mutex);
return 0;
}
static const struct v4l2_subdev_video_ops ov2740_video_ops = {
.s_stream = ov2740_set_stream,
};
static const struct v4l2_subdev_pad_ops ov2740_pad_ops = {
.set_fmt = ov2740_set_format,
.get_fmt = ov2740_get_format,
.enum_mbus_code = ov2740_enum_mbus_code,
.enum_frame_size = ov2740_enum_frame_size,
};
static const struct v4l2_subdev_ops ov2740_subdev_ops = {
.video = &ov2740_video_ops,
.pad = &ov2740_pad_ops,
};
static const struct media_entity_operations ov2740_subdev_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
static const struct v4l2_subdev_internal_ops ov2740_internal_ops = {
.open = ov2740_open,
};
static int ov2740_check_hwcfg(struct device *dev)
{
struct fwnode_handle *ep;
struct fwnode_handle *fwnode = dev_fwnode(dev);
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_CSI2_DPHY
};
u32 mclk;
int ret;
unsigned int i, j;
if (!fwnode)
return -ENXIO;
ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
if (ret)
return ret;
if (mclk != OV2740_MCLK) {
dev_err(dev, "external clock %d is not supported", mclk);
return -EINVAL;
}
ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
if (!ep)
return -ENXIO;
ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
fwnode_handle_put(ep);
if (ret)
return ret;
if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV2740_DATA_LANES) {
dev_err(dev, "number of CSI2 data lanes %d is not supported",
bus_cfg.bus.mipi_csi2.num_data_lanes);
ret = -EINVAL;
goto check_hwcfg_error;
}
if (!bus_cfg.nr_of_link_frequencies) {
dev_err(dev, "no link frequencies defined");
ret = -EINVAL;
goto check_hwcfg_error;
}
for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) {
for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) {
if (link_freq_menu_items[i] ==
bus_cfg.link_frequencies[j])
break;
}
if (j == bus_cfg.nr_of_link_frequencies) {
dev_err(dev, "no link frequency %lld supported",
link_freq_menu_items[i]);
ret = -EINVAL;
goto check_hwcfg_error;
}
}
check_hwcfg_error:
v4l2_fwnode_endpoint_free(&bus_cfg);
return ret;
}
static void ov2740_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov2740 *ov2740 = to_ov2740(sd);
v4l2_async_unregister_subdev(sd);
media_entity_cleanup(&sd->entity);
v4l2_ctrl_handler_free(sd->ctrl_handler);
pm_runtime_disable(&client->dev);
mutex_destroy(&ov2740->mutex);
}
static int ov2740_nvmem_read(void *priv, unsigned int off, void *val,
size_t count)
{
struct nvm_data *nvm = priv;
struct v4l2_subdev *sd = i2c_get_clientdata(nvm->client);
struct device *dev = &nvm->client->dev;
struct ov2740 *ov2740 = to_ov2740(sd);
int ret = 0;
mutex_lock(&ov2740->mutex);
if (nvm->nvm_buffer) {
memcpy(val, nvm->nvm_buffer + off, count);
goto exit;
}
ret = pm_runtime_resume_and_get(dev);
if (ret < 0) {
goto exit;
}
ret = ov2740_load_otp_data(nvm);
if (!ret)
memcpy(val, nvm->nvm_buffer + off, count);
pm_runtime_put(dev);
exit:
mutex_unlock(&ov2740->mutex);
return ret;
}
static int ov2740_register_nvmem(struct i2c_client *client,
struct ov2740 *ov2740)
{
struct nvm_data *nvm;
struct regmap_config regmap_config = { };
struct nvmem_config nvmem_config = { };
struct regmap *regmap;
struct device *dev = &client->dev;
int ret;
nvm = devm_kzalloc(dev, sizeof(*nvm), GFP_KERNEL);
if (!nvm)
return -ENOMEM;
regmap_config.val_bits = 8;
regmap_config.reg_bits = 16;
regmap_config.disable_locking = true;
regmap = devm_regmap_init_i2c(client, &regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
nvm->regmap = regmap;
nvm->client = client;
nvmem_config.name = dev_name(dev);
nvmem_config.dev = dev;
nvmem_config.read_only = true;
nvmem_config.root_only = true;
nvmem_config.owner = THIS_MODULE;
nvmem_config.compat = true;
nvmem_config.base_dev = dev;
nvmem_config.reg_read = ov2740_nvmem_read;
nvmem_config.reg_write = NULL;
nvmem_config.priv = nvm;
nvmem_config.stride = 1;
nvmem_config.word_size = 1;
nvmem_config.size = CUSTOMER_USE_OTP_SIZE;
nvm->nvmem = devm_nvmem_register(dev, &nvmem_config);
ret = PTR_ERR_OR_ZERO(nvm->nvmem);
if (!ret)
ov2740->nvm = nvm;
return ret;
}
static int ov2740_probe(struct i2c_client *client)
{
struct ov2740 *ov2740;
int ret = 0;
bool full_power;
ret = ov2740_check_hwcfg(&client->dev);
if (ret) {
dev_err(&client->dev, "failed to check HW configuration: %d",
ret);
return ret;
}
ov2740 = devm_kzalloc(&client->dev, sizeof(*ov2740), GFP_KERNEL);
if (!ov2740)
return -ENOMEM;
v4l2_i2c_subdev_init(&ov2740->sd, client, &ov2740_subdev_ops);
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
ret = ov2740_identify_module(ov2740);
if (ret) {
dev_err(&client->dev, "failed to find sensor: %d", ret);
return ret;
}
}
mutex_init(&ov2740->mutex);
ov2740->cur_mode = &supported_modes[0];
ret = ov2740_init_controls(ov2740);
if (ret) {
dev_err(&client->dev, "failed to init controls: %d", ret);
goto probe_error_v4l2_ctrl_handler_free;
}
ov2740->sd.internal_ops = &ov2740_internal_ops;
ov2740->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
ov2740->sd.entity.ops = &ov2740_subdev_entity_ops;
ov2740->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
ov2740->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&ov2740->sd.entity, 1, &ov2740->pad);
if (ret) {
dev_err(&client->dev, "failed to init entity pads: %d", ret);
goto probe_error_v4l2_ctrl_handler_free;
}
ret = v4l2_async_register_subdev_sensor(&ov2740->sd);
if (ret < 0) {
dev_err(&client->dev, "failed to register V4L2 subdev: %d",
ret);
goto probe_error_media_entity_cleanup;
}
ret = ov2740_register_nvmem(client, ov2740);
if (ret)
dev_warn(&client->dev, "register nvmem failed, ret %d\n", ret);
/* Set the device's state to active if it's in D0 state. */
if (full_power)
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
return 0;
probe_error_media_entity_cleanup:
media_entity_cleanup(&ov2740->sd.entity);
probe_error_v4l2_ctrl_handler_free:
v4l2_ctrl_handler_free(ov2740->sd.ctrl_handler);
mutex_destroy(&ov2740->mutex);
return ret;
}
static const struct dev_pm_ops ov2740_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(ov2740_suspend, ov2740_resume)
};
static const struct acpi_device_id ov2740_acpi_ids[] = {
{"INT3474"},
{}
};
MODULE_DEVICE_TABLE(acpi, ov2740_acpi_ids);
static struct i2c_driver ov2740_i2c_driver = {
.driver = {
.name = "ov2740",
.pm = &ov2740_pm_ops,
.acpi_match_table = ov2740_acpi_ids,
},
.probe_new = ov2740_probe,
.remove = ov2740_remove,
.flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(ov2740_i2c_driver);
MODULE_AUTHOR("Qiu, Tianshu <tian.shu.qiu@intel.com>");
MODULE_AUTHOR("Shawn Tu <shawnx.tu@intel.com>");
MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
MODULE_DESCRIPTION("OmniVision OV2740 sensor driver");
MODULE_LICENSE("GPL v2");