// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019 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 <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#define HI556_REG_VALUE_08BIT 1
#define HI556_REG_VALUE_16BIT 2
#define HI556_REG_VALUE_24BIT 3
#define HI556_LINK_FREQ_437MHZ 437000000ULL
#define HI556_MCLK 19200000
#define HI556_DATA_LANES 2
#define HI556_RGB_DEPTH 10
#define HI556_REG_CHIP_ID 0x0f16
#define HI556_CHIP_ID 0x0556
#define HI556_REG_MODE_SELECT 0x0a00
#define HI556_MODE_STANDBY 0x0000
#define HI556_MODE_STREAMING 0x0100
/* vertical-timings from sensor */
#define HI556_REG_FLL 0x0006
#define HI556_FLL_30FPS 0x0814
#define HI556_FLL_30FPS_MIN 0x0814
#define HI556_FLL_MAX 0x7fff
/* horizontal-timings from sensor */
#define HI556_REG_LLP 0x0008
/* Exposure controls from sensor */
#define HI556_REG_EXPOSURE 0x0074
#define HI556_EXPOSURE_MIN 6
#define HI556_EXPOSURE_MAX_MARGIN 2
#define HI556_EXPOSURE_STEP 1
/* Analog gain controls from sensor */
#define HI556_REG_ANALOG_GAIN 0x0077
#define HI556_ANAL_GAIN_MIN 0
#define HI556_ANAL_GAIN_MAX 240
#define HI556_ANAL_GAIN_STEP 1
/* Digital gain controls from sensor */
#define HI556_REG_MWB_GR_GAIN 0x0078
#define HI556_REG_MWB_GB_GAIN 0x007a
#define HI556_REG_MWB_R_GAIN 0x007c
#define HI556_REG_MWB_B_GAIN 0x007e
#define HI556_DGTL_GAIN_MIN 0
#define HI556_DGTL_GAIN_MAX 2048
#define HI556_DGTL_GAIN_STEP 1
#define HI556_DGTL_GAIN_DEFAULT 256
/* Test Pattern Control */
#define HI556_REG_ISP 0X0a05
#define HI556_REG_ISP_TPG_EN 0x01
#define HI556_REG_TEST_PATTERN 0x0201
enum {
HI556_LINK_FREQ_437MHZ_INDEX,
};
struct hi556_reg {
u16 address;
u16 val;
};
struct hi556_reg_list {
u32 num_of_regs;
const struct hi556_reg *regs;
};
struct hi556_link_freq_config {
const struct hi556_reg_list reg_list;
};
struct hi556_mode {
/* Frame width in pixels */
u32 width;
/* Frame height in pixels */
u32 height;
/* Horizontal timining size */
u32 llp;
/* Default vertical timining size */
u32 fll_def;
/* Min vertical timining size */
u32 fll_min;
/* Link frequency needed for this resolution */
u32 link_freq_index;
/* Sensor register settings for this resolution */
const struct hi556_reg_list reg_list;
};
#define to_hi556(_sd) container_of(_sd, struct hi556, sd)
//SENSOR_INITIALIZATION
static const struct hi556_reg mipi_data_rate_874mbps[] = {
{0x0e00, 0x0102},
{0x0e02, 0x0102},
{0x0e0c, 0x0100},
{0x2000, 0x7400},
{0x2002, 0x001c},
{0x2004, 0x0242},
{0x2006, 0x0942},
{0x2008, 0x7007},
{0x200a, 0x0fd9},
{0x200c, 0x0259},
{0x200e, 0x7008},
{0x2010, 0x160e},
{0x2012, 0x0047},
{0x2014, 0x2118},
{0x2016, 0x0041},
{0x2018, 0x00d8},
{0x201a, 0x0145},
{0x201c, 0x0006},
{0x201e, 0x0181},
{0x2020, 0x13cc},
{0x2022, 0x2057},
{0x2024, 0x7001},
{0x2026, 0x0fca},
{0x2028, 0x00cb},
{0x202a, 0x009f},
{0x202c, 0x7002},
{0x202e, 0x13cc},
{0x2030, 0x019b},
{0x2032, 0x014d},
{0x2034, 0x2987},
{0x2036, 0x2766},
{0x2038, 0x0020},
{0x203a, 0x2060},
{0x203c, 0x0e5d},
{0x203e, 0x181d},
{0x2040, 0x2066},
{0x2042, 0x20c4},
{0x2044, 0x5000},
{0x2046, 0x0005},
{0x2048, 0x0000},
{0x204a, 0x01db},
{0x204c, 0x025a},
{0x204e, 0x00c0},
{0x2050, 0x0005},
{0x2052, 0x0006},
{0x2054, 0x0ad9},
{0x2056, 0x0259},
{0x2058, 0x0618},
{0x205a, 0x0258},
{0x205c, 0x2266},
{0x205e, 0x20c8},
{0x2060, 0x2060},
{0x2062, 0x707b},
{0x2064, 0x0fdd},
{0x2066, 0x81b8},
{0x2068, 0x5040},
{0x206a, 0x0020},
{0x206c, 0x5060},
{0x206e, 0x3143},
{0x2070, 0x5081},
{0x2072, 0x025c},
{0x2074, 0x7800},
{0x2076, 0x7400},
{0x2078, 0x001c},
{0x207a, 0x0242},
{0x207c, 0x0942},
{0x207e, 0x0bd9},
{0x2080, 0x0259},
{0x2082, 0x7008},
{0x2084, 0x160e},
{0x2086, 0x0047},
{0x2088, 0x2118},
{0x208a, 0x0041},
{0x208c, 0x00d8},
{0x208e, 0x0145},
{0x2090, 0x0006},
{0x2092, 0x0181},
{0x2094, 0x13cc},
{0x2096, 0x2057},
{0x2098, 0x7001},
{0x209a, 0x0fca},
{0x209c, 0x00cb},
{0x209e, 0x009f},
{0x20a0, 0x7002},
{0x20a2, 0x13cc},
{0x20a4, 0x019b},
{0x20a6, 0x014d},
{0x20a8, 0x2987},
{0x20aa, 0x2766},
{0x20ac, 0x0020},
{0x20ae, 0x2060},
{0x20b0, 0x0e5d},
{0x20b2, 0x181d},
{0x20b4, 0x2066},
{0x20b6, 0x20c4},
{0x20b8, 0x50a0},
{0x20ba, 0x0005},
{0x20bc, 0x0000},
{0x20be, 0x01db},
{0x20c0, 0x025a},
{0x20c2, 0x00c0},
{0x20c4, 0x0005},
{0x20c6, 0x0006},
{0x20c8, 0x0ad9},
{0x20ca, 0x0259},
{0x20cc, 0x0618},
{0x20ce, 0x0258},
{0x20d0, 0x2266},
{0x20d2, 0x20c8},
{0x20d4, 0x2060},
{0x20d6, 0x707b},
{0x20d8, 0x0fdd},
{0x20da, 0x86b8},
{0x20dc, 0x50e0},
{0x20de, 0x0020},
{0x20e0, 0x5100},
{0x20e2, 0x3143},
{0x20e4, 0x5121},
{0x20e6, 0x7800},
{0x20e8, 0x3140},
{0x20ea, 0x01c4},
{0x20ec, 0x01c1},
{0x20ee, 0x01c0},
{0x20f0, 0x01c4},
{0x20f2, 0x2700},
{0x20f4, 0x3d40},
{0x20f6, 0x7800},
{0x20f8, 0xffff},
{0x27fe, 0xe000},
{0x3000, 0x60f8},
{0x3002, 0x187f},
{0x3004, 0x7060},
{0x3006, 0x0114},
{0x3008, 0x60b0},
{0x300a, 0x1473},
{0x300c, 0x0013},
{0x300e, 0x140f},
{0x3010, 0x0040},
{0x3012, 0x100f},
{0x3014, 0x60f8},
{0x3016, 0x187f},
{0x3018, 0x7060},
{0x301a, 0x0114},
{0x301c, 0x60b0},
{0x301e, 0x1473},
{0x3020, 0x0013},
{0x3022, 0x140f},
{0x3024, 0x0040},
{0x3026, 0x000f},
{0x0b00, 0x0000},
{0x0b02, 0x0045},
{0x0b04, 0xb405},
{0x0b06, 0xc403},
{0x0b08, 0x0081},
{0x0b0a, 0x8252},
{0x0b0c, 0xf814},
{0x0b0e, 0xc618},
{0x0b10, 0xa828},
{0x0b12, 0x004c},
{0x0b14, 0x4068},
{0x0b16, 0x0000},
{0x0f30, 0x5b15},
{0x0f32, 0x7067},
{0x0954, 0x0009},
{0x0956, 0x0000},
{0x0958, 0xbb80},
{0x095a, 0x5140},
{0x0c00, 0x1110},
{0x0c02, 0x0011},
{0x0c04, 0x0000},
{0x0c06, 0x0200},
{0x0c10, 0x0040},
{0x0c12, 0x0040},
{0x0c14, 0x0040},
{0x0c16, 0x0040},
{0x0a10, 0x4000},
{0x3068, 0xf800},
{0x306a, 0xf876},
{0x006c, 0x0000},
{0x005e, 0x0200},
{0x000e, 0x0100},
{0x0e0a, 0x0001},
{0x004a, 0x0100},
{0x004c, 0x0000},
{0x004e, 0x0100},
{0x000c, 0x0022},
{0x0008, 0x0b00},
{0x005a, 0x0202},
{0x0012, 0x000e},
{0x0018, 0x0a33},
{0x0022, 0x0008},
{0x0028, 0x0017},
{0x0024, 0x0028},
{0x002a, 0x002d},
{0x0026, 0x0030},
{0x002c, 0x07c9},
{0x002e, 0x1111},
{0x0030, 0x1111},
{0x0032, 0x1111},
{0x0006, 0x07bc},
{0x0a22, 0x0000},
{0x0a12, 0x0a20},
{0x0a14, 0x0798},
{0x003e, 0x0000},
{0x0074, 0x080e},
{0x0070, 0x0407},
{0x0002, 0x0000},
{0x0a02, 0x0100},
{0x0a24, 0x0100},
{0x0046, 0x0000},
{0x0076, 0x0000},
{0x0060, 0x0000},
{0x0062, 0x0530},
{0x0064, 0x0500},
{0x0066, 0x0530},
{0x0068, 0x0500},
{0x0122, 0x0300},
{0x015a, 0xff08},
{0x0804, 0x0300},
{0x0806, 0x0100},
{0x005c, 0x0102},
{0x0a1a, 0x0800},
};
static const struct hi556_reg mode_2592x1944_regs[] = {
{0x0a00, 0x0000},
{0x0b0a, 0x8252},
{0x0f30, 0x5b15},
{0x0f32, 0x7067},
{0x004a, 0x0100},
{0x004c, 0x0000},
{0x004e, 0x0100},
{0x000c, 0x0022},
{0x0008, 0x0b00},
{0x005a, 0x0202},
{0x0012, 0x000e},
{0x0018, 0x0a33},
{0x0022, 0x0008},
{0x0028, 0x0017},
{0x0024, 0x0028},
{0x002a, 0x002d},
{0x0026, 0x0030},
{0x002c, 0x07c9},
{0x002e, 0x1111},
{0x0030, 0x1111},
{0x0032, 0x1111},
{0x0006, 0x0814},
{0x0a22, 0x0000},
{0x0a12, 0x0a20},
{0x0a14, 0x0798},
{0x003e, 0x0000},
{0x0074, 0x0812},
{0x0070, 0x0409},
{0x0804, 0x0300},
{0x0806, 0x0100},
{0x0a04, 0x014a},
{0x090c, 0x0fdc},
{0x090e, 0x002d},
{0x0902, 0x4319},
{0x0914, 0xc10a},
{0x0916, 0x071f},
{0x0918, 0x0408},
{0x091a, 0x0c0d},
{0x091c, 0x0f09},
{0x091e, 0x0a00},
{0x0958, 0xbb80},
};
static const struct hi556_reg mode_1296x972_regs[] = {
{0x0a00, 0x0000},
{0x0b0a, 0x8259},
{0x0f30, 0x5b15},
{0x0f32, 0x7167},
{0x004a, 0x0100},
{0x004c, 0x0000},
{0x004e, 0x0100},
{0x000c, 0x0122},
{0x0008, 0x0b00},
{0x005a, 0x0404},
{0x0012, 0x000c},
{0x0018, 0x0a33},
{0x0022, 0x0008},
{0x0028, 0x0017},
{0x0024, 0x0022},
{0x002a, 0x002b},
{0x0026, 0x0030},
{0x002c, 0x07c9},
{0x002e, 0x3311},
{0x0030, 0x3311},
{0x0032, 0x3311},
{0x0006, 0x0814},
{0x0a22, 0x0000},
{0x0a12, 0x0510},
{0x0a14, 0x03cc},
{0x003e, 0x0000},
{0x0074, 0x0812},
{0x0070, 0x0409},
{0x0804, 0x0308},
{0x0806, 0x0100},
{0x0a04, 0x016a},
{0x090e, 0x0010},
{0x090c, 0x09c0},
{0x0902, 0x4319},
{0x0914, 0xc106},
{0x0916, 0x040e},
{0x0918, 0x0304},
{0x091a, 0x0708},
{0x091c, 0x0e06},
{0x091e, 0x0300},
{0x0958, 0xbb80},
};
static const char * const hi556_test_pattern_menu[] = {
"Disabled",
"Solid Colour",
"100% Colour Bars",
"Fade To Grey Colour Bars",
"PN9",
"Gradient Horizontal",
"Gradient Vertical",
"Check Board",
"Slant Pattern",
};
static const s64 link_freq_menu_items[] = {
HI556_LINK_FREQ_437MHZ,
};
static const struct hi556_link_freq_config link_freq_configs[] = {
[HI556_LINK_FREQ_437MHZ_INDEX] = {
.reg_list = {
.num_of_regs = ARRAY_SIZE(mipi_data_rate_874mbps),
.regs = mipi_data_rate_874mbps,
}
}
};
static const struct hi556_mode supported_modes[] = {
{
.width = 2592,
.height = 1944,
.fll_def = HI556_FLL_30FPS,
.fll_min = HI556_FLL_30FPS_MIN,
.llp = 0x0b00,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_2592x1944_regs),
.regs = mode_2592x1944_regs,
},
.link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX,
},
{
.width = 1296,
.height = 972,
.fll_def = HI556_FLL_30FPS,
.fll_min = HI556_FLL_30FPS_MIN,
.llp = 0x0b00,
.reg_list = {
.num_of_regs = ARRAY_SIZE(mode_1296x972_regs),
.regs = mode_1296x972_regs,
},
.link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX,
}
};
struct hi556 {
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 hi556_mode *cur_mode;
/* To serialize asynchronus callbacks */
struct mutex mutex;
/* Streaming on/off */
bool streaming;
/* True if the device has been identified */
bool identified;
};
static u64 to_pixel_rate(u32 f_index)
{
u64 pixel_rate = link_freq_menu_items[f_index] * 2 * HI556_DATA_LANES;
do_div(pixel_rate, HI556_RGB_DEPTH);
return pixel_rate;
}
static int hi556_read_reg(struct hi556 *hi556, u16 reg, u16 len, u32 *val)
{
struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
struct i2c_msg msgs[2];
u8 addr_buf[2];
u8 data_buf[4] = {0};
int ret;
if (len > 4)
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[4 - len];
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs))
return -EIO;
*val = get_unaligned_be32(data_buf);
return 0;
}
static int hi556_write_reg(struct hi556 *hi556, u16 reg, u16 len, u32 val)
{
struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
u8 buf[6];
if (len > 4)
return -EINVAL;
put_unaligned_be16(reg, buf);
put_unaligned_be32(val << 8 * (4 - len), buf + 2);
if (i2c_master_send(client, buf, len + 2) != len + 2)
return -EIO;
return 0;
}
static int hi556_write_reg_list(struct hi556 *hi556,
const struct hi556_reg_list *r_list)
{
struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
unsigned int i;
int ret;
for (i = 0; i < r_list->num_of_regs; i++) {
ret = hi556_write_reg(hi556, r_list->regs[i].address,
HI556_REG_VALUE_16BIT,
r_list->regs[i].val);
if (ret) {
dev_err_ratelimited(&client->dev,
"failed to write reg 0x%4.4x. error = %d",
r_list->regs[i].address, ret);
return ret;
}
}
return 0;
}
static int hi556_update_digital_gain(struct hi556 *hi556, u32 d_gain)
{
int ret;
ret = hi556_write_reg(hi556, HI556_REG_MWB_GR_GAIN,
HI556_REG_VALUE_16BIT, d_gain);
if (ret)
return ret;
ret = hi556_write_reg(hi556, HI556_REG_MWB_GB_GAIN,
HI556_REG_VALUE_16BIT, d_gain);
if (ret)
return ret;
ret = hi556_write_reg(hi556, HI556_REG_MWB_R_GAIN,
HI556_REG_VALUE_16BIT, d_gain);
if (ret)
return ret;
return hi556_write_reg(hi556, HI556_REG_MWB_B_GAIN,
HI556_REG_VALUE_16BIT, d_gain);
}
static int hi556_test_pattern(struct hi556 *hi556, u32 pattern)
{
int ret;
u32 val;
if (pattern) {
ret = hi556_read_reg(hi556, HI556_REG_ISP,
HI556_REG_VALUE_08BIT, &val);
if (ret)
return ret;
ret = hi556_write_reg(hi556, HI556_REG_ISP,
HI556_REG_VALUE_08BIT,
val | HI556_REG_ISP_TPG_EN);
if (ret)
return ret;
}
return hi556_write_reg(hi556, HI556_REG_TEST_PATTERN,
HI556_REG_VALUE_08BIT, pattern);
}
static int hi556_set_ctrl(struct v4l2_ctrl *ctrl)
{
struct hi556 *hi556 = container_of(ctrl->handler,
struct hi556, ctrl_handler);
struct i2c_client *client = v4l2_get_subdevdata(&hi556->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 = hi556->cur_mode->height + ctrl->val -
HI556_EXPOSURE_MAX_MARGIN;
__v4l2_ctrl_modify_range(hi556->exposure,
hi556->exposure->minimum,
exposure_max, hi556->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 = hi556_write_reg(hi556, HI556_REG_ANALOG_GAIN,
HI556_REG_VALUE_16BIT, ctrl->val);
break;
case V4L2_CID_DIGITAL_GAIN:
ret = hi556_update_digital_gain(hi556, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
ret = hi556_write_reg(hi556, HI556_REG_EXPOSURE,
HI556_REG_VALUE_16BIT, ctrl->val);
break;
case V4L2_CID_VBLANK:
/* Update FLL that meets expected vertical blanking */
ret = hi556_write_reg(hi556, HI556_REG_FLL,
HI556_REG_VALUE_16BIT,
hi556->cur_mode->height + ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = hi556_test_pattern(hi556, ctrl->val);
break;
default:
ret = -EINVAL;
break;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops hi556_ctrl_ops = {
.s_ctrl = hi556_set_ctrl,
};
static int hi556_init_controls(struct hi556 *hi556)
{
struct v4l2_ctrl_handler *ctrl_hdlr;
s64 exposure_max, h_blank;
int ret;
ctrl_hdlr = &hi556->ctrl_handler;
ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
if (ret)
return ret;
ctrl_hdlr->lock = &hi556->mutex;
hi556->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &hi556_ctrl_ops,
V4L2_CID_LINK_FREQ,
ARRAY_SIZE(link_freq_menu_items) - 1,
0, link_freq_menu_items);
if (hi556->link_freq)
hi556->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
hi556->pixel_rate = v4l2_ctrl_new_std
(ctrl_hdlr, &hi556_ctrl_ops,
V4L2_CID_PIXEL_RATE, 0,
to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX),
1,
to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX));
hi556->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
V4L2_CID_VBLANK,
hi556->cur_mode->fll_min -
hi556->cur_mode->height,
HI556_FLL_MAX -
hi556->cur_mode->height, 1,
hi556->cur_mode->fll_def -
hi556->cur_mode->height);
h_blank = hi556->cur_mode->llp - hi556->cur_mode->width;
hi556->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
V4L2_CID_HBLANK, h_blank, h_blank, 1,
h_blank);
if (hi556->hblank)
hi556->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_ANALOGUE_GAIN,
HI556_ANAL_GAIN_MIN, HI556_ANAL_GAIN_MAX,
HI556_ANAL_GAIN_STEP, HI556_ANAL_GAIN_MIN);
v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_DIGITAL_GAIN,
HI556_DGTL_GAIN_MIN, HI556_DGTL_GAIN_MAX,
HI556_DGTL_GAIN_STEP, HI556_DGTL_GAIN_DEFAULT);
exposure_max = hi556->cur_mode->fll_def - HI556_EXPOSURE_MAX_MARGIN;
hi556->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops,
V4L2_CID_EXPOSURE,
HI556_EXPOSURE_MIN, exposure_max,
HI556_EXPOSURE_STEP,
exposure_max);
v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &hi556_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(hi556_test_pattern_menu) - 1,
0, 0, hi556_test_pattern_menu);
if (ctrl_hdlr->error)
return ctrl_hdlr->error;
hi556->sd.ctrl_handler = ctrl_hdlr;
return 0;
}
static void hi556_assign_pad_format(const struct hi556_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 hi556_identify_module(struct hi556 *hi556)
{
struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
int ret;
u32 val;
if (hi556->identified)
return 0;
ret = hi556_read_reg(hi556, HI556_REG_CHIP_ID,
HI556_REG_VALUE_16BIT, &val);
if (ret)
return ret;
if (val != HI556_CHIP_ID) {
dev_err(&client->dev, "chip id mismatch: %x!=%x",
HI556_CHIP_ID, val);
return -ENXIO;
}
hi556->identified = true;
return 0;
}
static int hi556_start_streaming(struct hi556 *hi556)
{
struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
const struct hi556_reg_list *reg_list;
int link_freq_index, ret;
ret = hi556_identify_module(hi556);
if (ret)
return ret;
link_freq_index = hi556->cur_mode->link_freq_index;
reg_list = &link_freq_configs[link_freq_index].reg_list;
ret = hi556_write_reg_list(hi556, reg_list);
if (ret) {
dev_err(&client->dev, "failed to set plls");
return ret;
}
reg_list = &hi556->cur_mode->reg_list;
ret = hi556_write_reg_list(hi556, reg_list);
if (ret) {
dev_err(&client->dev, "failed to set mode");
return ret;
}
ret = __v4l2_ctrl_handler_setup(hi556->sd.ctrl_handler);
if (ret)
return ret;
ret = hi556_write_reg(hi556, HI556_REG_MODE_SELECT,
HI556_REG_VALUE_16BIT, HI556_MODE_STREAMING);
if (ret) {
dev_err(&client->dev, "failed to set stream");
return ret;
}
return 0;
}
static void hi556_stop_streaming(struct hi556 *hi556)
{
struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd);
if (hi556_write_reg(hi556, HI556_REG_MODE_SELECT,
HI556_REG_VALUE_16BIT, HI556_MODE_STANDBY))
dev_err(&client->dev, "failed to set stream");
}
static int hi556_set_stream(struct v4l2_subdev *sd, int enable)
{
struct hi556 *hi556 = to_hi556(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
if (hi556->streaming == enable)
return 0;
mutex_lock(&hi556->mutex);
if (enable) {
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0) {
mutex_unlock(&hi556->mutex);
return ret;
}
ret = hi556_start_streaming(hi556);
if (ret) {
enable = 0;
hi556_stop_streaming(hi556);
pm_runtime_put(&client->dev);
}
} else {
hi556_stop_streaming(hi556);
pm_runtime_put(&client->dev);
}
hi556->streaming = enable;
mutex_unlock(&hi556->mutex);
return ret;
}
static int __maybe_unused hi556_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct hi556 *hi556 = to_hi556(sd);
mutex_lock(&hi556->mutex);
if (hi556->streaming)
hi556_stop_streaming(hi556);
mutex_unlock(&hi556->mutex);
return 0;
}
static int __maybe_unused hi556_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct hi556 *hi556 = to_hi556(sd);
int ret;
mutex_lock(&hi556->mutex);
if (hi556->streaming) {
ret = hi556_start_streaming(hi556);
if (ret)
goto error;
}
mutex_unlock(&hi556->mutex);
return 0;
error:
hi556_stop_streaming(hi556);
hi556->streaming = 0;
mutex_unlock(&hi556->mutex);
return ret;
}
static int hi556_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct hi556 *hi556 = to_hi556(sd);
const struct hi556_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(&hi556->mutex);
hi556_assign_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 {
hi556->cur_mode = mode;
__v4l2_ctrl_s_ctrl(hi556->link_freq, mode->link_freq_index);
__v4l2_ctrl_s_ctrl_int64(hi556->pixel_rate,
to_pixel_rate(mode->link_freq_index));
/* Update limits and set FPS to default */
vblank_def = mode->fll_def - mode->height;
__v4l2_ctrl_modify_range(hi556->vblank,
mode->fll_min - mode->height,
HI556_FLL_MAX - mode->height, 1,
vblank_def);
__v4l2_ctrl_s_ctrl(hi556->vblank, vblank_def);
h_blank = hi556->cur_mode->llp - hi556->cur_mode->width;
__v4l2_ctrl_modify_range(hi556->hblank, h_blank, h_blank, 1,
h_blank);
}
mutex_unlock(&hi556->mutex);
return 0;
}
static int hi556_get_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct hi556 *hi556 = to_hi556(sd);
mutex_lock(&hi556->mutex);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
fmt->format = *v4l2_subdev_get_try_format(&hi556->sd,
sd_state,
fmt->pad);
else
hi556_assign_pad_format(hi556->cur_mode, &fmt->format);
mutex_unlock(&hi556->mutex);
return 0;
}
static int hi556_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 hi556_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 hi556_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct hi556 *hi556 = to_hi556(sd);
mutex_lock(&hi556->mutex);
hi556_assign_pad_format(&supported_modes[0],
v4l2_subdev_get_try_format(sd, fh->state, 0));
mutex_unlock(&hi556->mutex);
return 0;
}
static const struct v4l2_subdev_video_ops hi556_video_ops = {
.s_stream = hi556_set_stream,
};
static const struct v4l2_subdev_pad_ops hi556_pad_ops = {
.set_fmt = hi556_set_format,
.get_fmt = hi556_get_format,
.enum_mbus_code = hi556_enum_mbus_code,
.enum_frame_size = hi556_enum_frame_size,
};
static const struct v4l2_subdev_ops hi556_subdev_ops = {
.video = &hi556_video_ops,
.pad = &hi556_pad_ops,
};
static const struct media_entity_operations hi556_subdev_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
static const struct v4l2_subdev_internal_ops hi556_internal_ops = {
.open = hi556_open,
};
static int hi556_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 = 0;
unsigned int i, j;
if (!fwnode)
return -ENXIO;
ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
if (ret) {
dev_err(dev, "can't get clock frequency");
return ret;
}
if (mclk != HI556_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 != 2) {
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 int hi556_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct hi556 *hi556 = to_hi556(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(&hi556->mutex);
return 0;
}
static int hi556_probe(struct i2c_client *client)
{
struct hi556 *hi556;
bool full_power;
int ret;
ret = hi556_check_hwcfg(&client->dev);
if (ret) {
dev_err(&client->dev, "failed to check HW configuration: %d",
ret);
return ret;
}
hi556 = devm_kzalloc(&client->dev, sizeof(*hi556), GFP_KERNEL);
if (!hi556)
return -ENOMEM;
v4l2_i2c_subdev_init(&hi556->sd, client, &hi556_subdev_ops);
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
ret = hi556_identify_module(hi556);
if (ret) {
dev_err(&client->dev, "failed to find sensor: %d", ret);
return ret;
}
}
mutex_init(&hi556->mutex);
hi556->cur_mode = &supported_modes[0];
ret = hi556_init_controls(hi556);
if (ret) {
dev_err(&client->dev, "failed to init controls: %d", ret);
goto probe_error_v4l2_ctrl_handler_free;
}
hi556->sd.internal_ops = &hi556_internal_ops;
hi556->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
hi556->sd.entity.ops = &hi556_subdev_entity_ops;
hi556->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
hi556->pad.flags = MEDIA_PAD_FL_SOURCE;
ret = media_entity_pads_init(&hi556->sd.entity, 1, &hi556->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(&hi556->sd);
if (ret < 0) {
dev_err(&client->dev, "failed to register V4L2 subdev: %d",
ret);
goto probe_error_media_entity_cleanup;
}
/* 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(&hi556->sd.entity);
probe_error_v4l2_ctrl_handler_free:
v4l2_ctrl_handler_free(hi556->sd.ctrl_handler);
mutex_destroy(&hi556->mutex);
return ret;
}
static const struct dev_pm_ops hi556_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(hi556_suspend, hi556_resume)
};
#ifdef CONFIG_ACPI
static const struct acpi_device_id hi556_acpi_ids[] = {
{"INT3537"},
{}
};
MODULE_DEVICE_TABLE(acpi, hi556_acpi_ids);
#endif
static struct i2c_driver hi556_i2c_driver = {
.driver = {
.name = "hi556",
.pm = &hi556_pm_ops,
.acpi_match_table = ACPI_PTR(hi556_acpi_ids),
},
.probe_new = hi556_probe,
.remove = hi556_remove,
.flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(hi556_i2c_driver);
MODULE_AUTHOR("Shawn Tu <shawnx.tu@intel.com>");
MODULE_DESCRIPTION("Hynix HI556 sensor driver");
MODULE_LICENSE("GPL v2");
