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CoolPi-Armbian-Rockchip-RK3.../drivers/media/i2c/max96756.c

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// SPDX-License-Identifier: GPL-2.0
/*
* max96756 GMSL2/GMSL1 to CSI-2 Deserializer driver
*
* Copyright (C) 2023 Rockchip Electronics Co., Ltd.
*
* V0.0X01.0X00 first version.
*
* V0.0X01.0X01
* - Support V4L2 DV class features
*/
#define DEBUG
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/version.h>
#include <linux/compat.h>
#include <linux/rk-camera-module.h>
#include <linux/v4l2-dv-timings.h>
#include <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h>
#include <linux/pinctrl/consumer.h>
#include "max96756.h"
#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x01)
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-3)");
#ifndef V4L2_CID_DIGITAL_GAIN
#define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN
#endif
#define MAX96756_LINK_FREQ_MHZ(x) ((x)*1000 * 1000ULL)
#define MAX96756_PIXEL_RATE (450LL * 2 * 4 / 8)
#define MAX96756_REG_CHIP_ID 0x0D
#define CHIP_ID 0x90
#define MAX96756_REG_CTRL_MODE 0x0313
#define MAX96756_MODE_SW_STANDBY 0x0
#define MAX96756_MODE_STREAMING BIT(1)
#define REG_NULL 0xFFFF
#define OF_CAMERA_PINCTRL_STATE_DEFAULT "rockchip,camera_default"
#define OF_CAMERA_PINCTRL_STATE_SLEEP "rockchip,camera_sleep"
#define MAX96756_REG_VALUE_08BIT 1
#define MAX96756_REG_VALUE_16BIT 2
#define MAX96756_NAME "max96756"
#define MAX96756_MEDIA_BUS_FMT MEDIA_BUS_FMT_BGR888_1X24
static const char *const max96756_supply_names[] = {
"vcc1v2", /* Analog power */
"vcc1v8", /* Digital I/O power */
};
#define MAX96756_NUM_SUPPLIES ARRAY_SIZE(max96756_supply_names)
static struct rkmodule_csi_dphy_param rk3588_dcphy_param = {
.vendor = PHY_VENDOR_SAMSUNG,
.lp_vol_ref = 3,
.lp_hys_sw = { 3, 0, 0, 0 },
.lp_escclk_pol_sel = { 1, 0, 0, 0 },
.skew_data_cal_clk = { 0, 0, 0, 0 },
.clk_hs_term_sel = 2,
.data_hs_term_sel = { 2, 2, 2, 2 },
.reserved = { 0 },
};
struct regval {
u16 i2c_addr;
u16 addr;
u8 val;
u16 delay;
};
struct max96756_mode {
u32 width;
u32 height;
struct v4l2_fract max_fps;
u32 hts_def;
u32 vts_def;
u32 exp_def;
u32 link_freq_idx;
u32 bpp;
const struct regval *reg_list;
};
static const struct v4l2_dv_timings_cap max96756_timings_cap = {
.type = V4L2_DV_BT_656_1120,
.reserved = { 0 },
V4L2_INIT_BT_TIMINGS(
1, 10000, 1, 10000, 0, 800000000,
V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_INTERLACED |
V4L2_DV_BT_CAP_REDUCED_BLANKING | V4L2_DV_BT_CAP_CUSTOM)
};
struct max96756 {
struct i2c_client *client;
struct clk *xvclk;
struct gpio_desc *pwdn_gpio;
struct regulator_bulk_data supplies[MAX96756_NUM_SUPPLIES];
struct pinctrl *pinctrl;
struct pinctrl_state *pins_default;
struct pinctrl_state *pins_sleep;
struct gpio_desc *lock_gpio;
int lock_irq;
struct delayed_work delayed_work_lock;
struct work_struct work_i2c_poll;
struct v4l2_subdev subdev;
struct media_pad pad;
struct v4l2_fwnode_endpoint bus_cfg;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *lock_det;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *test_pattern;
struct v4l2_dv_timings timings;
struct mutex mutex;
bool streaming;
bool power_on;
bool hot_plug;
u8 is_reset;
const struct max96756_mode *cur_mode;
u32 module_index;
const char *module_facing;
const char *module_name;
const char *len_name;
};
#define to_max96756(sd) container_of(sd, struct max96756, subdev)
static const struct regval max96756_mipi_1080p_60fps[] = {
// Disable all phys
{ 0x48, 0x0332, 0x00, 0x00 },
// Video pipes tx disabled, audio tx EN
{ 0x48, 0x0002, 0x03, 0x00 },
// CSI output disabled
{ 0x48, 0x0313, 0x00, 0x00 },
// AUTOLINK = 0, LINK_CFG = Link A
// VDD = 1.2V
// Oneshot Reset[5]=0b1
// REG_ENABLE[2]=0b1
{ 0x48, 0x0010, 0x25, 0x00 },
// CXTP_B[2]=0b1
// CXTP_A[0]=0b1
{ 0x48, 0x0011, 0x0F, 0x00 },
// REG_MNL[4]=0b1
{ 0x48, 0x0012, 0x14, 0x00 },
{ 0x48, 0x0010, 0x05, 0x00 },
// PHY mode 2x4
{ 0x48, 0x0330, 0x04, 0x00 },
// PHY1 900 Mbps, override bpp,vc,dt
{ 0x48, 0x0320, 0xA9, 0x00 },
// PHY2 900 Mbps
{ 0x48, 0x0323, 0x29, 0x00 },
// Lane mapping
{ 0x48, 0x0333, 0x4E, 0x00 },
{ 0x48, 0x0334, 0x4E, 0x00 },
// 4 data lanes
{ 0x48, 0x044A, 0xD0, 0x00 },
{ 0x48, 0x048A, 0xD0, 0x00 },
// Map DST 0/1/2/3 to DPHY1
{ 0x48, 0x046D, 0x55, 0x00 },
// Map EN 0/1/2
{ 0x48, 0x044B, 0x07, 0x00 },
// SRC0 FS
{ 0x48, 0x044D, 0x00, 0x00 },
// DST0 FS
{ 0x48, 0x044E, 0x00, 0x00 },
// SRC1 FS ???
{ 0x48, 0x044F, 0x01, 0x00 },
// DST1 FE
{ 0x48, 0x0450, 0x01, 0x00 },
// SRC2 DT 0x24
{ 0x48, 0x0451, 0x24, 0x00 },
// DST2 DT 0x24
{ 0x48, 0x0452, 0x24, 0x00 },
// DT Y=0x24 0b100100
{ 0x48, 0x0316, 0x80, 0x00 },
{ 0x48, 0x0317, 0x04, 0x00 },
// BPP Y=0x18(DT=0x24)
{ 0x48, 0x0319, 0x18, 0x00 },
// Pipe X stream id 1
{ 0x48, 0x0050, 0x01, 0x00 },
// Pipe Y stream id 0
{ 0x48, 0x0051, 0x00, 0x00 },
// HS, VS output
// { 0x48, 0x0540, 0xA0, 0x00 },
// { 0x48, 0x0542, 0xA0, 0x00 },
// Video pipe Y en, Audio en
{ 0x48, 0x0002, 0x27, 0x00 },
// Enable all phys
// T_hs_trail = 66.7ns + 8UI
// T_lpx = 106.7ns
{ 0x48, 0x0332, 0xF4, 0x00 },
// Audio RX EN
{ 0x48, 0x0158, 0x21, 0x00 },
{ 0x48, REG_NULL, 0x00, 0x00 },
};
static const struct max96756_mode supported_modes[] = {
{
.width = 1920,
.height = 1080,
.max_fps = {
.numerator = 10000,
.denominator = 600000,
},
.reg_list = max96756_mipi_1080p_60fps,
.link_freq_idx = 0,
},
};
static const struct max96756_mode supported_modes_dcphy[] = {
{
.width = 1920,
.height = 1080,
.max_fps = {
.numerator = 10000,
.denominator = 600000,
},
.reg_list = max96756_mipi_1080p_60fps,
.link_freq_idx = 1,
},
};
static const s64 link_freq_items[] = {
MAX96756_LINK_FREQ_MHZ(450),
MAX96756_LINK_FREQ_MHZ(900),
};
static int max96756_write_reg(struct i2c_client *client, u16 reg, u32 len,
u32 val)
{
u32 buf_i, val_i;
u8 buf[6];
u8 *val_p;
__be32 val_be;
dev_dbg(&client->dev, "write reg(0x%04x val:0x%02x)!\n", reg, val);
if (len > 4)
return -EINVAL;
buf[0] = reg >> 8;
buf[1] = reg & 0xff;
val_be = cpu_to_be32(val);
val_p = (u8 *)&val_be;
buf_i = 2;
val_i = 4 - len;
while (val_i < 4)
buf[buf_i++] = val_p[val_i++];
if (i2c_master_send(client, buf, len + 2) != len + 2)
return -EIO;
return 0;
}
static int max96756_write_array(struct i2c_client *client,
const struct regval *regs)
{
u32 i;
int ret = 0;
for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) {
client->addr = regs[i].i2c_addr;
ret = max96756_write_reg(client, regs[i].addr,
MAX96756_REG_VALUE_08BIT, regs[i].val);
if (regs[i].delay > 0)
msleep(regs[i].delay);
}
return ret;
}
static int max96756_read_reg(struct i2c_client *client, u16 reg,
unsigned int len, u32 *val)
{
struct i2c_msg msgs[2];
u8 *data_be_p;
__be32 data_be = 0;
__be16 reg_addr_be = cpu_to_be16(reg);
int ret;
if (len > 4 || !len)
return -EINVAL;
data_be_p = (u8 *)&data_be;
/* Write register address */
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = 2;
msgs[0].buf = (u8 *)&reg_addr_be;
/* Read data from register */
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = len;
msgs[1].buf = &data_be_p[4 - len];
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (ret != ARRAY_SIZE(msgs))
return -EIO;
*val = be32_to_cpu(data_be);
return 0;
}
static int max96756_get_reso_dist(const struct max96756_mode *mode,
struct v4l2_mbus_framefmt *framefmt)
{
return abs(mode->width - framefmt->width) +
abs(mode->height - framefmt->height);
}
static const struct max96756_mode *
max96756_find_best_fit(struct v4l2_subdev_format *fmt)
{
struct v4l2_mbus_framefmt *framefmt = &fmt->format;
int dist;
int cur_best_fit = 0;
int cur_best_fit_dist = -1;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(supported_modes); i++) {
dist = max96756_get_reso_dist(&supported_modes[i], framefmt);
if (cur_best_fit_dist == -1 || dist < cur_best_fit_dist) {
cur_best_fit_dist = dist;
cur_best_fit = i;
}
}
return &supported_modes[cur_best_fit];
}
static int max96756_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct max96756 *max96756 = to_max96756(sd);
const struct max96756_mode *mode;
mutex_lock(&max96756->mutex);
mode = max96756_find_best_fit(fmt);
fmt->format.code = MAX96756_MEDIA_BUS_FMT;
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.field = V4L2_FIELD_NONE;
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
*v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format;
#else
mutex_unlock(&max96756->mutex);
return -ENOTTY;
#endif
} else {
if (max96756->streaming) {
mutex_unlock(&max96756->mutex);
return -EBUSY;
}
}
mutex_unlock(&max96756->mutex);
return 0;
}
static int max96756_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct max96756 *max96756 = to_max96756(sd);
const struct max96756_mode *mode = max96756->cur_mode;
mutex_lock(&max96756->mutex);
if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
#else
mutex_unlock(&max96756->mutex);
return -ENOTTY;
#endif
} else {
fmt->format.width = mode->width;
fmt->format.height = mode->height;
fmt->format.code = MAX96756_MEDIA_BUS_FMT;
fmt->format.field = V4L2_FIELD_NONE;
}
mutex_unlock(&max96756->mutex);
return 0;
}
static int max96756_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
if (code->index != 0)
return -EINVAL;
code->code = MAX96756_MEDIA_BUS_FMT;
return 0;
}
static int max96756_enum_frame_sizes(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
if (fse->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
if (fse->code != MAX96756_MEDIA_BUS_FMT)
return -EINVAL;
fse->min_width = supported_modes[fse->index].width;
fse->max_width = supported_modes[fse->index].width;
fse->max_height = supported_modes[fse->index].height;
fse->min_height = supported_modes[fse->index].height;
return 0;
}
static int max96756_g_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_frame_interval *fi)
{
struct max96756 *max96756 = to_max96756(sd);
const struct max96756_mode *mode = max96756->cur_mode;
mutex_lock(&max96756->mutex);
fi->interval = mode->max_fps;
mutex_unlock(&max96756->mutex);
return 0;
}
static void max96756_get_module_inf(struct max96756 *max96756,
struct rkmodule_inf *inf)
{
memset(inf, 0, sizeof(*inf));
strscpy(inf->base.sensor, MAX96756_NAME, sizeof(inf->base.sensor));
strscpy(inf->base.module, max96756->module_name,
sizeof(inf->base.module));
strscpy(inf->base.lens, max96756->len_name, sizeof(inf->base.lens));
}
static void
max96756_get_vicap_rst_inf(struct max96756 *max96756,
struct rkmodule_vicap_reset_info *rst_info)
{
struct i2c_client *client = max96756->client;
rst_info->is_reset = max96756->hot_plug;
max96756->hot_plug = false;
rst_info->src = RKCIF_RESET_SRC_ERR_HOTPLUG;
dev_info(&client->dev, "%s: rst_info->is_reset:%d.\n", __func__,
rst_info->is_reset);
}
static void
max96756_set_vicap_rst_inf(struct max96756 *max96756,
struct rkmodule_vicap_reset_info rst_info)
{
max96756->is_reset = rst_info.is_reset;
}
static long max96756_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
struct max96756 *max96756 = to_max96756(sd);
long ret = 0;
u32 stream = 0;
struct rkmodule_csi_dphy_param *dphy_param;
switch (cmd) {
case RKMODULE_GET_MODULE_INFO:
max96756_get_module_inf(max96756, (struct rkmodule_inf *)arg);
break;
case RKMODULE_GET_HDMI_MODE:
*(int *)arg = RKMODULE_HDMIIN_MODE;
break;
case RKMODULE_SET_QUICK_STREAM:
stream = *((u32 *)arg);
if (stream)
ret = max96756_write_reg(max96756->client,
MAX96756_REG_CTRL_MODE,
MAX96756_REG_VALUE_08BIT,
MAX96756_MODE_STREAMING);
else
ret = max96756_write_reg(max96756->client,
MAX96756_REG_CTRL_MODE,
MAX96756_REG_VALUE_08BIT,
MAX96756_MODE_SW_STANDBY);
break;
case RKMODULE_GET_VICAP_RST_INFO:
max96756_get_vicap_rst_inf(
max96756, (struct rkmodule_vicap_reset_info *)arg);
break;
case RKMODULE_SET_VICAP_RST_INFO:
max96756_set_vicap_rst_inf(
max96756, *(struct rkmodule_vicap_reset_info *)arg);
break;
case RKMODULE_SET_CSI_DPHY_PARAM:
dphy_param = (struct rkmodule_csi_dphy_param *)arg;
rk3588_dcphy_param = *dphy_param;
dev_dbg(&max96756->client->dev, "sensor set dphy param\n");
break;
case RKMODULE_GET_CSI_DPHY_PARAM:
dphy_param = (struct rkmodule_csi_dphy_param *)arg;
*dphy_param = rk3588_dcphy_param;
dev_dbg(&max96756->client->dev, "sensor get dphy param\n");
default:
ret = -ENOIOCTLCMD;
break;
}
return ret;
}
#ifdef CONFIG_COMPAT
static long max96756_compat_ioctl32(struct v4l2_subdev *sd, unsigned int cmd,
unsigned long arg)
{
void __user *up = compat_ptr(arg);
struct rkmodule_inf *inf;
struct rkmodule_vicap_reset_info *vicap_rst_inf;
long ret = 0;
int *seq;
u32 stream = 0;
struct rkmodule_csi_dphy_param *dphy_param;
switch (cmd) {
case RKMODULE_GET_MODULE_INFO:
inf = kzalloc(sizeof(*inf), GFP_KERNEL);
if (!inf) {
ret = -ENOMEM;
return ret;
}
ret = max96756_ioctl(sd, cmd, inf);
if (!ret) {
ret = copy_to_user(up, inf, sizeof(*inf));
if (ret)
ret = -EFAULT;
}
kfree(inf);
break;
case RKMODULE_GET_HDMI_MODE:
seq = kzalloc(sizeof(*seq), GFP_KERNEL);
if (!seq) {
ret = -ENOMEM;
return ret;
}
ret = max96756_ioctl(sd, cmd, seq);
if (!ret) {
ret = copy_to_user(up, seq, sizeof(*seq));
if (ret)
ret = -EFAULT;
}
kfree(seq);
break;
case RKMODULE_GET_VICAP_RST_INFO:
vicap_rst_inf = kzalloc(sizeof(*vicap_rst_inf), GFP_KERNEL);
if (!vicap_rst_inf) {
ret = -ENOMEM;
return ret;
}
ret = max96756_ioctl(sd, cmd, vicap_rst_inf);
if (!ret) {
ret = copy_to_user(up, vicap_rst_inf,
sizeof(*vicap_rst_inf));
if (ret)
ret = -EFAULT;
}
kfree(vicap_rst_inf);
break;
case RKMODULE_SET_VICAP_RST_INFO:
vicap_rst_inf = kzalloc(sizeof(*vicap_rst_inf), GFP_KERNEL);
if (!vicap_rst_inf) {
ret = -ENOMEM;
return ret;
}
ret = copy_from_user(vicap_rst_inf, up, sizeof(*vicap_rst_inf));
if (!ret)
ret = max96756_ioctl(sd, cmd, vicap_rst_inf);
else
ret = -EFAULT;
kfree(vicap_rst_inf);
break;
case RKMODULE_SET_QUICK_STREAM:
ret = copy_from_user(&stream, up, sizeof(u32));
if (!ret)
ret = max96756_ioctl(sd, cmd, &stream);
else
ret = -EFAULT;
break;
case RKMODULE_SET_CSI_DPHY_PARAM:
dphy_param = kzalloc(sizeof(*dphy_param), GFP_KERNEL);
if (!dphy_param) {
ret = -ENOMEM;
return ret;
}
ret = copy_from_user(dphy_param, up, sizeof(*dphy_param));
if (!ret)
ret = max96756_ioctl(sd, cmd, dphy_param);
else
ret = -EFAULT;
kfree(dphy_param);
break;
case RKMODULE_GET_CSI_DPHY_PARAM:
dphy_param = kzalloc(sizeof(*dphy_param), GFP_KERNEL);
if (!dphy_param) {
ret = -ENOMEM;
return ret;
}
ret = max96756_ioctl(sd, cmd, dphy_param);
if (!ret) {
ret = copy_to_user(up, dphy_param, sizeof(*dphy_param));
if (ret)
ret = -EFAULT;
}
kfree(dphy_param);
break;
default:
ret = -ENOIOCTLCMD;
break;
}
return ret;
}
#endif
static int max96756_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
struct v4l2_event_subscription *sub)
{
switch (sub->type) {
case V4L2_EVENT_SOURCE_CHANGE:
return v4l2_src_change_event_subdev_subscribe(sd, fh, sub);
case V4L2_EVENT_CTRL:
return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
default:
return -EINVAL;
}
}
static int __max96756_start_stream(struct max96756 *max96756)
{
int ret;
ret = max96756_write_array(max96756->client,
max96756->cur_mode->reg_list);
if (ret) {
dev_warn(&max96756->client->dev,
"Failed to write initial sequence\n");
return ret;
}
/* In case these controls are set before streaming */
mutex_unlock(&max96756->mutex);
ret = v4l2_ctrl_handler_setup(&max96756->ctrl_handler);
mutex_lock(&max96756->mutex);
if (ret) {
dev_warn(&max96756->client->dev, "Failed to setup ctrl\n");
return ret;
}
return max96756_write_reg(max96756->client, MAX96756_REG_CTRL_MODE,
MAX96756_REG_VALUE_08BIT,
MAX96756_MODE_STREAMING);
}
static int __max96756_stop_stream(struct max96756 *max96756)
{
int ret;
ret = max96756_write_reg(max96756->client, MAX96756_REG_CTRL_MODE,
MAX96756_REG_VALUE_08BIT,
MAX96756_MODE_SW_STANDBY);
return ret;
}
static bool max96756_match_timings(const struct v4l2_dv_timings *t1,
const struct v4l2_dv_timings *t2)
{
if (t1->type != t2->type || t1->type != V4L2_DV_BT_656_1120)
return false;
if (t1->bt.width == t2->bt.width && t1->bt.height == t2->bt.height &&
t1->bt.interlaced == t2->bt.interlaced)
return true;
return false;
}
static inline bool max96756_detect_lock_status(struct max96756 *max96756)
{
bool ret;
int val, i, cnt;
/* if not use lock gpio */
if (!max96756->lock_gpio)
return true;
cnt = 0;
for (i = 0; i < 5; i++) {
val = gpiod_get_value(max96756->lock_gpio);
if (val > 0)
cnt++;
usleep_range(500, 600);
}
ret = (cnt >= 3) ? true : false;
v4l2_dbg(1, debug, &max96756->subdev, "%s: %d\n", __func__, ret);
return ret;
}
static bool max96756_check_signal(struct max96756 *max96756)
{
u32 val = 0;
max96756_read_reg(max96756->client, 0x11A, MAX96756_REG_VALUE_08BIT,
&val);
return val & (1 << 6);
}
static int max96756_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
struct max96756 *max96756 = to_max96756(sd);
*status = 0;
*status |= max96756_check_signal(max96756) ? V4L2_IN_ST_NO_SIGNAL : 0;
v4l2_dbg(1, debug, sd, "%s: status = 0x%x\n", __func__, *status);
return 0;
}
static int max96756_s_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct max96756 *max96756 = to_max96756(sd);
if (!timings)
return -EINVAL;
if (debug)
v4l2_print_dv_timings(sd->name, "s_dv_timings: ", timings,
false);
if (max96756_match_timings(&max96756->timings, timings)) {
v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
return 0;
}
if (!v4l2_valid_dv_timings(timings, &max96756_timings_cap, NULL,
NULL)) {
v4l2_dbg(1, debug, sd, "%s: timings out of range\n", __func__);
return -ERANGE;
}
max96756->timings = *timings;
__max96756_stop_stream(max96756);
return 0;
}
static int max96756_g_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct max96756 *max96756 = to_max96756(sd);
*timings = max96756->timings;
return 0;
}
static int max96756_enum_dv_timings(struct v4l2_subdev *sd,
struct v4l2_enum_dv_timings *timings)
{
if (timings->pad != 0)
return -EINVAL;
return v4l2_enum_dv_timings_cap(timings, &max96756_timings_cap, NULL,
NULL);
}
static int max96756_query_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct max96756 *max96756 = to_max96756(sd);
*timings = max96756->timings;
if (debug)
v4l2_print_dv_timings(sd->name, "query_dv_timings: ", timings,
false);
if (!v4l2_valid_dv_timings(timings, &max96756_timings_cap, NULL,
NULL)) {
v4l2_dbg(1, debug, sd, "%s: timings out of range\n", __func__);
return -ERANGE;
}
return 0;
}
static int max96756_dv_timings_cap(struct v4l2_subdev *sd,
struct v4l2_dv_timings_cap *cap)
{
if (cap->pad != 0)
return -EINVAL;
*cap = max96756_timings_cap;
return 0;
}
static int max96756_s_stream(struct v4l2_subdev *sd, int on)
{
struct max96756 *max96756 = to_max96756(sd);
struct i2c_client *client = max96756->client;
int ret = 0;
dev_info(&client->dev, "%s: on: %d, %dx%d@%d\n", __func__, on,
max96756->cur_mode->width, max96756->cur_mode->height,
DIV_ROUND_CLOSEST(max96756->cur_mode->max_fps.denominator,
max96756->cur_mode->max_fps.numerator));
mutex_lock(&max96756->mutex);
on = !!on;
if (on == max96756->streaming)
goto unlock_and_return;
if (on) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
goto unlock_and_return;
}
ret = __max96756_start_stream(max96756);
if (ret) {
v4l2_err(sd, "start stream failed while write regs\n");
pm_runtime_put(&client->dev);
goto unlock_and_return;
}
} else {
__max96756_stop_stream(max96756);
pm_runtime_put(&client->dev);
}
max96756->streaming = on;
unlock_and_return:
mutex_unlock(&max96756->mutex);
return ret;
}
static int max96756_s_power(struct v4l2_subdev *sd, int on)
{
struct max96756 *max96756 = to_max96756(sd);
struct i2c_client *client = max96756->client;
int ret = 0;
mutex_lock(&max96756->mutex);
/* If the power state is not modified - no work to do. */
if (max96756->power_on == !!on)
goto unlock_and_return;
if (on) {
ret = pm_runtime_get_sync(&client->dev);
if (ret < 0) {
pm_runtime_put_noidle(&client->dev);
goto unlock_and_return;
}
max96756->power_on = true;
} else {
pm_runtime_put(&client->dev);
max96756->power_on = false;
}
unlock_and_return:
mutex_unlock(&max96756->mutex);
return ret;
}
static int __max96756_power_on(struct max96756 *max96756)
{
int ret;
struct device *dev = &max96756->client->dev;
if (!IS_ERR_OR_NULL(max96756->pins_default)) {
ret = pinctrl_select_state(max96756->pinctrl,
max96756->pins_default);
if (ret < 0)
dev_err(dev, "could not set pins\n");
}
if (!IS_ERR(max96756->pwdn_gpio)) {
gpiod_set_value_cansleep(max96756->pwdn_gpio, 1);
usleep_range(45000, 100000);
}
return 0;
}
static void __max96756_power_off(struct max96756 *max96756)
{
int ret;
struct device *dev = &max96756->client->dev;
if (!IS_ERR(max96756->pwdn_gpio)) {
gpiod_set_value_cansleep(max96756->pwdn_gpio, 0);
usleep_range(1000, 2000);
}
if (!IS_ERR_OR_NULL(max96756->pins_sleep)) {
ret = pinctrl_select_state(max96756->pinctrl,
max96756->pins_sleep);
if (ret < 0)
dev_dbg(dev, "could not set pins\n");
}
}
static int max96756_runtime_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct max96756 *max96756 = to_max96756(sd);
return __max96756_power_on(max96756);
}
static int max96756_runtime_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct max96756 *max96756 = to_max96756(sd);
__max96756_power_off(max96756);
return 0;
}
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static int max96756_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct max96756 *max96756 = to_max96756(sd);
struct v4l2_mbus_framefmt *try_fmt =
v4l2_subdev_get_try_format(sd, fh->pad, 0);
const struct max96756_mode *def_mode = &supported_modes[0];
mutex_lock(&max96756->mutex);
/* Initialize try_fmt */
try_fmt->width = def_mode->width;
try_fmt->height = def_mode->height;
try_fmt->code = MAX96756_MEDIA_BUS_FMT;
try_fmt->field = V4L2_FIELD_NONE;
mutex_unlock(&max96756->mutex);
/* No crop or compose */
return 0;
}
#endif
static int
max96756_enum_frame_interval(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_interval_enum *fie)
{
if (fie->index >= ARRAY_SIZE(supported_modes))
return -EINVAL;
fie->code = MAX96756_MEDIA_BUS_FMT;
fie->width = supported_modes[fie->index].width;
fie->height = supported_modes[fie->index].height;
fie->interval = supported_modes[fie->index].max_fps;
return 0;
}
static int max96756_g_mbus_config(struct v4l2_subdev *sd, unsigned int pad,
struct v4l2_mbus_config *config)
{
config->type = V4L2_MBUS_CSI2_DPHY;
config->flags = V4L2_MBUS_CSI2_4_LANE | V4L2_MBUS_CSI2_CHANNEL_0 |
V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
return 0;
}
static int max96756_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct max96756 *max96756 = to_max96756(sd);
if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) {
sel->r.left = 0;
sel->r.width = max96756->cur_mode->width;
sel->r.top = 0;
sel->r.height = max96756->cur_mode->height;
return 0;
}
return -EINVAL;
}
static const struct dev_pm_ops max96756_pm_ops = { SET_RUNTIME_PM_OPS(
max96756_runtime_suspend, max96756_runtime_resume, NULL) };
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static const struct v4l2_subdev_internal_ops max96756_internal_ops = {
.open = max96756_open,
};
#endif
static const struct v4l2_subdev_core_ops max96756_core_ops = {
.s_power = max96756_s_power,
.subscribe_event = max96756_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
.ioctl = max96756_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl32 = max96756_compat_ioctl32,
#endif
};
static const struct v4l2_subdev_video_ops max96756_video_ops = {
.g_input_status = max96756_g_input_status,
.s_dv_timings = max96756_s_dv_timings,
.g_dv_timings = max96756_g_dv_timings,
.query_dv_timings = max96756_query_dv_timings,
.s_stream = max96756_s_stream,
.g_frame_interval = max96756_g_frame_interval,
};
static const struct v4l2_subdev_pad_ops max96756_pad_ops = {
.enum_mbus_code = max96756_enum_mbus_code,
.enum_frame_size = max96756_enum_frame_sizes,
.enum_frame_interval = max96756_enum_frame_interval,
.get_fmt = max96756_get_fmt,
.set_fmt = max96756_set_fmt,
.get_selection = max96756_get_selection,
.get_mbus_config = max96756_g_mbus_config,
.enum_dv_timings = max96756_enum_dv_timings,
.dv_timings_cap = max96756_dv_timings_cap,
};
static const struct v4l2_subdev_ops max96756_subdev_ops = {
.core = &max96756_core_ops,
.video = &max96756_video_ops,
.pad = &max96756_pad_ops,
};
static int max96756_initialize_controls(struct max96756 *max96756)
{
const struct max96756_mode *mode;
struct v4l2_ctrl_handler *handler;
int ret;
handler = &max96756->ctrl_handler;
mode = max96756->cur_mode;
ret = v4l2_ctrl_handler_init(handler, 3);
if (ret)
return ret;
handler->lock = &max96756->mutex;
max96756->link_freq =
v4l2_ctrl_new_int_menu(handler, NULL, V4L2_CID_LINK_FREQ,
ARRAY_SIZE(link_freq_items) - 1, 0,
link_freq_items);
max96756->pixel_rate =
v4l2_ctrl_new_std(handler, NULL, V4L2_CID_PIXEL_RATE, 0,
MAX96756_PIXEL_RATE, 1, MAX96756_PIXEL_RATE);
max96756->lock_det = v4l2_ctrl_new_std(
handler, NULL, V4L2_CID_DV_RX_POWER_PRESENT, 0, 1, 0, 0);
__v4l2_ctrl_s_ctrl_int64(max96756->pixel_rate, MAX96756_PIXEL_RATE);
__v4l2_ctrl_s_ctrl(max96756->link_freq, mode->link_freq_idx);
__v4l2_ctrl_s_ctrl(max96756->lock_det,
max96756_detect_lock_status(max96756));
if (handler->error) {
ret = handler->error;
dev_err(&max96756->client->dev, "Failed to init controls(%d)\n",
ret);
goto err_free_handler;
}
max96756->subdev.ctrl_handler = handler;
return 0;
err_free_handler:
v4l2_ctrl_handler_free(handler);
return ret;
}
static int max96756_check_sensor_id(struct max96756 *max96756,
struct i2c_client *client)
{
struct device *dev = &max96756->client->dev;
u32 id = 0;
int ret;
ret = max96756_read_reg(client, MAX96756_REG_CHIP_ID,
MAX96756_REG_VALUE_08BIT, &id);
if (id != CHIP_ID) {
dev_err(dev, "Unexpected sensor id(%02x), ret(%d)\n", id, ret);
return -ENODEV;
}
dev_info(dev, "Detected %02x deserializer\n", CHIP_ID);
return 0;
}
static void max96756_delayed_work_lock(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct max96756 *max96756 =
container_of(dwork, struct max96756, delayed_work_lock);
__v4l2_ctrl_s_ctrl(max96756->lock_det,
max96756_detect_lock_status(max96756));
}
static irqreturn_t lock_irq_handler(int irq, void *dev_id)
{
struct max96756 *max96756 = dev_id;
mutex_lock(&max96756->mutex);
if (max96756->streaming)
schedule_delayed_work(&max96756->delayed_work_lock,
msecs_to_jiffies(50));
mutex_unlock(&max96756->mutex);
return IRQ_HANDLED;
}
static int max96756_configure_regulators(struct max96756 *max96756)
{
unsigned int i;
for (i = 0; i < MAX96756_NUM_SUPPLIES; i++)
max96756->supplies[i].supply = max96756_supply_names[i];
return devm_regulator_bulk_get(&max96756->client->dev,
MAX96756_NUM_SUPPLIES,
max96756->supplies);
}
static int max96756_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *node = dev->of_node;
struct max96756 *max96756;
struct v4l2_subdev *sd;
char facing[2];
int ret;
dev_info(dev, "driver version: %02x.%02x.%02x", DRIVER_VERSION >> 16,
(DRIVER_VERSION & 0xff00) >> 8, DRIVER_VERSION & 0x00ff);
max96756 = devm_kzalloc(dev, sizeof(*max96756), GFP_KERNEL);
if (!max96756)
return -ENOMEM;
ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
&max96756->module_index);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
&max96756->module_facing);
ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
&max96756->module_name);
ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
&max96756->len_name);
if (ret) {
dev_err(dev, "could not get module information!\n");
return -EINVAL;
}
max96756->client = client;
max96756->cur_mode = &supported_modes[0];
max96756->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
if (IS_ERR(max96756->pwdn_gpio))
dev_warn(dev, "Failed to get pwdn-gpios\n");
max96756->lock_gpio = devm_gpiod_get_optional(dev, "lock", GPIOD_IN);
if (IS_ERR(max96756->lock_gpio)) {
dev_warn(dev, "failed to get lock gpio, will use i2c poll\n");
} else {
max96756->lock_irq = gpiod_to_irq(max96756->lock_gpio);
if (max96756->lock_irq < 0)
dev_err(dev, "failed to get lock irq, maybe no use\n");
ret = devm_request_threaded_irq(
dev, max96756->lock_irq, NULL, lock_irq_handler,
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
IRQF_ONESHOT,
"max96756", max96756);
if (ret)
dev_err(dev,
"failed to register lock irq (%d), maybe no use\n",
ret);
}
ret = max96756_configure_regulators(max96756);
if (ret) {
dev_err(dev, "Failed to get power regulators\n");
return ret;
}
max96756->pinctrl = devm_pinctrl_get(dev);
if (!IS_ERR(max96756->pinctrl)) {
max96756->pins_default = pinctrl_lookup_state(
max96756->pinctrl, OF_CAMERA_PINCTRL_STATE_DEFAULT);
if (IS_ERR(max96756->pins_default))
dev_err(dev, "could not get default pinstate\n");
max96756->pins_sleep = pinctrl_lookup_state(
max96756->pinctrl, OF_CAMERA_PINCTRL_STATE_SLEEP);
if (IS_ERR(max96756->pins_sleep))
dev_err(dev, "could not get sleep pinstate\n");
}
mutex_init(&max96756->mutex);
sd = &max96756->subdev;
v4l2_i2c_subdev_init(sd, client, &max96756_subdev_ops);
ret = max96756_initialize_controls(max96756);
if (ret)
goto err_destroy_mutex;
ret = __max96756_power_on(max96756);
if (ret)
goto err_free_handler;
ret = max96756_check_sensor_id(max96756, client);
if (ret)
goto err_power_off;
INIT_DELAYED_WORK(&max96756->delayed_work_lock,
max96756_delayed_work_lock);
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
sd->internal_ops = &max96756_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
#endif
#if defined(CONFIG_MEDIA_CONTROLLER)
max96756->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &max96756->pad);
if (ret < 0)
goto err_power_off;
#endif
memset(facing, 0, sizeof(facing));
if (strcmp(max96756->module_facing, "back") == 0)
facing[0] = 'b';
else
facing[0] = 'f';
snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
max96756->module_index, facing, MAX96756_NAME,
dev_name(sd->dev));
ret = v4l2_async_register_subdev_sensor_common(sd);
if (ret) {
dev_err(dev, "v4l2 async register subdev failed\n");
goto err_clean_entity;
}
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
return 0;
err_clean_entity:
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
err_power_off:
__max96756_power_off(max96756);
err_free_handler:
v4l2_ctrl_handler_free(&max96756->ctrl_handler);
err_destroy_mutex:
mutex_destroy(&max96756->mutex);
return ret;
}
static int max96756_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct max96756 *max96756 = to_max96756(sd);
cancel_delayed_work_sync(&max96756->delayed_work_lock);
v4l2_async_unregister_subdev(sd);
#if defined(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif
v4l2_ctrl_handler_free(&max96756->ctrl_handler);
mutex_destroy(&max96756->mutex);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
__max96756_power_off(max96756);
pm_runtime_set_suspended(&client->dev);
return 0;
}
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id max96756_of_match[] = {
{ .compatible = "maxim,max96756" },
{},
};
MODULE_DEVICE_TABLE(of, max96756_of_match);
#endif
static const struct i2c_device_id max96756_match_id[] = {
{ "maxim,max96756", 0 },
{},
};
static struct i2c_driver max96756_i2c_driver = {
.driver = {
.name = MAX96756_NAME,
.pm = &max96756_pm_ops,
.of_match_table = of_match_ptr(max96756_of_match),
},
.probe_new = &max96756_probe,
.remove = &max96756_remove,
.id_table = max96756_match_id,
};
module_i2c_driver(max96756_i2c_driver);
MODULE_DESCRIPTION("Maxim MAX96756 GMSL1/2 CSI display deserializer driver");
MODULE_AUTHOR("Cody Xie <cody.xie@rock-chips.com>");
MODULE_LICENSE("GPL");
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