Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/*
 * max96722 GMSL2/GMSL1 to CSI-2 Deserializer driver
 *
 * Copyright (C) 2022 Rockchip Electronics Co., Ltd.
 *
 * V0.0X01.0X00 first version.
 *
 */
 
#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 <media/media-entity.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-subdev.h>
#include <linux/pinctrl/consumer.h>
 
#define DRIVER_VERSION			KERNEL_VERSION(0, 0x01, 0x00)
 
#ifndef V4L2_CID_DIGITAL_GAIN
#define V4L2_CID_DIGITAL_GAIN		V4L2_CID_GAIN
#endif
 
#define MAX96722_LINK_FREQ_400MHZ	400000000UL
/* pixel rate = link frequency * 2 * lanes / BITS_PER_SAMPLE */
#define MAX96722_PIXEL_RATE		(MAX96722_LINK_FREQ_400MHZ * 2LL * 4LL / 24LL)
#define MAX96722_XVCLK_FREQ		24000000
 
#define CHIP_ID				0xA1
#define MAX96722_REG_CHIP_ID		0x0D
 
#define MAX96722_REG_CTRL_MODE		0x08a0
#define MAX96722_MODE_SW_STANDBY	0x4
#define MAX96722_MODE_STREAMING		0xa4
 
#define MAX96722_REMOTE_CTRL		0x0003
#define MAX96722_REMOTE_DISABLE		0xFF
 
#define REG_NULL			0xFFFF
 
#define MAX96722_LANES			4
 
#define OF_CAMERA_PINCTRL_STATE_DEFAULT	"rockchip,camera_default"
#define OF_CAMERA_PINCTRL_STATE_SLEEP	"rockchip,camera_sleep"
 
#define MAX96722_REG_VALUE_08BIT	1
#define MAX96722_REG_VALUE_16BIT	2
#define MAX96722_REG_VALUE_24BIT	3
 
#define MAX96722_NAME			"max96722"
#define MAX96722_MEDIA_BUS_FMT		MEDIA_BUS_FMT_RGB888_1X24
 
static const char * const max96722_supply_names[] = {
<------>"avdd",		/* Analog power */
<------>"dovdd",	/* Digital I/O power */
<------>"dvdd",		/* Digital core power */
};
 
#define MAX96722_NUM_SUPPLIES ARRAY_SIZE(max96722_supply_names)
 
struct regval {
<------>u16 i2c_addr;
<------>u16 addr;
<------>u8 val;
<------>u16 delay;
};
 
struct max96722_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;
};
 
struct max96722 {
<------>struct i2c_client	*client;
<------>struct clk		*xvclk;
<------>struct gpio_desc	*power_gpio;
<------>struct gpio_desc	*reset_gpio;
<------>struct gpio_desc	*pwdn_gpio;
<------>struct regulator_bulk_data supplies[MAX96722_NUM_SUPPLIES];
 
<------>struct pinctrl		*pinctrl;
<------>struct pinctrl_state	*pins_default;
<------>struct pinctrl_state	*pins_sleep;
 
<------>struct v4l2_subdev	subdev;
<------>struct media_pad	pad;
<------>struct v4l2_ctrl_handler ctrl_handler;
<------>struct v4l2_ctrl	*exposure;
<------>struct v4l2_ctrl	*anal_gain;
<------>struct v4l2_ctrl	*digi_gain;
<------>struct v4l2_ctrl	*hblank;
<------>struct v4l2_ctrl	*vblank;
<------>struct v4l2_ctrl	*pixel_rate;
<------>struct v4l2_ctrl	*link_freq;
<------>struct v4l2_ctrl	*test_pattern;
<------>struct mutex		mutex;
<------>bool			streaming;
<------>bool			power_on;
<------>bool			hot_plug;
<------>u8			is_reset;
<------>const struct max96722_mode *cur_mode;
<------>u32			module_index;
<------>const char		*module_facing;
<------>const char		*module_name;
<------>const char		*len_name;
};
 
#define to_max96722(sd) container_of(sd, struct max96722, subdev)
 
static const struct regval max96722_mipi_init[] = {
<------>{0x6b, 0x0006, 0xF0, 0x00},
<------>// Disable MIPI output
<------>{0x6b, 0x040B, 0x00, 0x00},
<------>// RGB888 software override for all pipes since connected GMSL1 is under parallel mode
<------>{0x6b, 0x040B, 0xC0, 0x00},	//0b11000-000, bpp0=0x18
<------>{0x6b, 0x040E, 0xA4, 0x00},	//0b10-100100, DT0=0x24
<------>{0x6b, 0x040F, 0x04, 0x00},	//0b0000-0100, DT1=0x24
<------>{0x6b, 0x0411, 0x18, 0x00},	//0b000-11000, bpp1=0x18
<------>//Video pipe sel
<------>{0x6b, 0x00F0, 0x40, 0x00},	//LINKA-pipex=pipe0, LINKB-pipex=pipe1
<------>// Send RGB888, FS, and FE from Pipe 0 to Controller 1
<------>{0x6b, 0x090B, 0x07, 0x00}, // Enable 3 Mappings
<------>{0x6b, 0x092D, 0x15, 0x00},	//Map Data to Port A
<------>// For the following MSB 2 bits = VC, LSB 6 bits =DT
<------>{0x6b, 0x090D, 0x24, 0x00}, // SRC DT = RGB888
<------>{0x6b, 0x090E, 0x24, 0x00}, // DEST DT = RGB888
<------>{0x6b, 0x090F, 0x00, 0x00}, // SRC DT = Frame Start
<------>{0x6b, 0x0910, 0x00, 0x00}, // DEST DT = Frame Start
<------>{0x6b, 0x0911, 0x01, 0x00}, // SRC DT = Frame End
<------>{0x6b, 0x0912, 0x01, 0x00}, // DEST DT = Frame End
<------>//Send RGB888, FS, and FE from Pipe 1 to Controller 2
<------>{0x6b, 0x094B, 0x07, 0x00},
<------>{0x6b, 0x096D, 0xAA, 0x00}, // map to MIPI Controller 2
<------>// For the following MSB 2 bits = VC, LSB 6 bits =DT
<------>{0x6b, 0x094D, 0x24, 0x00},
<------>{0x6b, 0x094E, 0x24, 0x00}, // map to VC0
<------>{0x6b, 0x094F, 0x00, 0x00}, // frame start
<------>{0x6b, 0x0950, 0x00, 0x00},
<------>{0x6b, 0x0951, 0x01, 0x00},
<------>{0x6b, 0x0952, 0x01, 0x00},
<------>// MIPI PHY Setting
<------>// Set Des in 2x4 mode
<------>{0x6b, 0x08A0, 0x04, 0x00},
<------>// Set Lane Mapping for 4-lane port A
<------>{0x6b, 0x08A3, 0xE4, 0x00},
<------>{0x6b, 0x08A4, 0xE4, 0x00},
<------>// Set 4 lane D-PHY
<------>{0x6b, 0x090A, 0xC0, 0x00},
<------>{0x6b, 0x094A, 0xC0, 0x00},
<------>{0x6b, 0x098A, 0xC0, 0x00},
<------>{0x6b, 0x09CA, 0xC0, 0x00},
<------>// Turn on MIPI PHYs
<------>{0x6b, 0x08A2, 0xF0, 0x00},
<------>// Hold DPLL in reset (config_soft_rst_n = 0) before changing the rate
<------>{0x6b, 0x1C00, 0xF4, 0x00},
<------>{0x6b, 0x1D00, 0xF4, 0x00},
<------>{0x6b, 0x1E00, 0xF4, 0x00},
<------>{0x6b, 0x1F00, 0xF4, 0x00},
<------>// Set Data rate to be 800Mbps/lane for port A and enable software override
<------>{0x6b, 0x0415, 0xE8, 0x00},	//override pipe0/1
<------>{0x6b, 0x0418, 0x28, 0x00},
<------>{0x6b, 0x041B, 0x28, 0x00},
<------>{0x6b, 0x041E, 0x28, 0x00},
<------>// Release reset to DPLL (config_soft_rst_n = 1)
<------>{0x6b, 0x1C00, 0xF5, 0x00},
<------>{0x6b, 0x1D00, 0xF5, 0x00},
<------>{0x6b, 0x1E00, 0xF5, 0x00},
<------>{0x6b, 0x1F00, 0xF5, 0x00},
<------>{0x6b, 0x0003, 0xFF, 0x00},
<------>{0x6b, 0x0006, 0xF3, 0x0a},
<------>// {0x6b, 0x08A0, 0x84},
<------>{0x6b, REG_NULL, 0x00, 0x00},
};
 
static const struct max96722_mode supported_modes[] = {
<------>{
<------><------>.width = 1920,
<------><------>.height = 1080,
<------><------>.max_fps = {
<------><------><------>.numerator = 10000,
<------><------><------>.denominator = 300000,
<------><------>},
<------><------>.reg_list = max96722_mipi_init,
<------><------>.link_freq_idx = 0,
<------>},
};
 
static const s64 link_freq_items[] = {
<------>MAX96722_LINK_FREQ_400MHZ,
};
 
/* Write registers up to 4 at a time */
static int max96722_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%x val:0x%x)!\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) {
<------><------>dev_err(&client->dev, "%s: writing register 0x%x from 0x%x failed\n",
<------><------><------><------>__func__, reg, client->addr);
<------><------>return -EIO;
<------>}
 
<------>return 0;
}
 
static int max96722_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 = max96722_write_reg(client, regs[i].addr,
<------><------><------><------><------>MAX96722_REG_VALUE_08BIT,
<------><------><------><------><------>regs[i].val);
<------><------>msleep(regs[i].delay);
<------>}
 
<------>return ret;
}
 
/* Read registers up to 4 at a time */
static int max96722_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)) {
<------><------>dev_err(&client->dev, "%s: reading register 0x%x from 0x%x failed\n",
<------><------><------><------>__func__, reg, client->addr);
<------><------>return -EIO;
<------>}
 
<------>*val = be32_to_cpu(data_be);
 
<------>return 0;
}
 
static int max96722_get_reso_dist(const struct max96722_mode *mode,
<------><------><------><------> struct v4l2_mbus_framefmt *framefmt)
{
<------>return abs(mode->width - framefmt->width) +
<------><------>abs(mode->height - framefmt->height);
}
 
static const struct max96722_mode *
max96722_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 = max96722_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 max96722_set_fmt(struct v4l2_subdev *sd,
<------><------><------>   struct v4l2_subdev_pad_config *cfg,
<------><------><------>  struct v4l2_subdev_format *fmt)
{
<------>struct max96722 *max96722 = to_max96722(sd);
<------>const struct max96722_mode *mode;
 
<------>mutex_lock(&max96722->mutex);
 
<------>mode = max96722_find_best_fit(fmt);
<------>fmt->format.code = MAX96722_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(&max96722->mutex);
<------><------>return -ENOTTY;
#endif
<------>} else {
<------><------>if (max96722->streaming) {
<------><------><------>mutex_unlock(&max96722->mutex);
<------><------><------>return -EBUSY;
<------><------>}
<------>}
 
<------>mutex_unlock(&max96722->mutex);
 
<------>return 0;
}
 
static int max96722_get_fmt(struct v4l2_subdev *sd,
<------><------><------>   struct v4l2_subdev_pad_config *cfg,
<------><------><------>   struct v4l2_subdev_format *fmt)
{
<------>struct max96722 *max96722 = to_max96722(sd);
<------>const struct max96722_mode *mode = max96722->cur_mode;
 
<------>mutex_lock(&max96722->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(&max96722->mutex);
<------><------>return -ENOTTY;
#endif
<------>} else {
<------><------>fmt->format.width = mode->width;
<------><------>fmt->format.height = mode->height;
<------><------>fmt->format.code = MAX96722_MEDIA_BUS_FMT;
<------><------>fmt->format.field = V4L2_FIELD_NONE;
<------>}
<------>mutex_unlock(&max96722->mutex);
 
<------>return 0;
}
 
static int max96722_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 = MAX96722_MEDIA_BUS_FMT;
 
<------>return 0;
}
 
static int max96722_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 != MAX96722_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 max96722_g_frame_interval(struct v4l2_subdev *sd,
<------><------><------><------>    struct v4l2_subdev_frame_interval *fi)
{
<------>struct max96722 *max96722 = to_max96722(sd);
<------>const struct max96722_mode *mode = max96722->cur_mode;
 
<------>mutex_lock(&max96722->mutex);
<------>fi->interval = mode->max_fps;
<------>mutex_unlock(&max96722->mutex);
 
<------>return 0;
}
 
static void max96722_get_module_inf(struct max96722 *max96722,
<------><------><------><------>   struct rkmodule_inf *inf)
{
<------>memset(inf, 0, sizeof(*inf));
<------>strscpy(inf->base.sensor, MAX96722_NAME, sizeof(inf->base.sensor));
<------>strscpy(inf->base.module, max96722->module_name,
<------><------>sizeof(inf->base.module));
<------>strscpy(inf->base.lens, max96722->len_name, sizeof(inf->base.lens));
}
 
static void max96722_get_vicap_rst_inf(struct max96722 *max96722,
<------><------><------><------>   struct rkmodule_vicap_reset_info *rst_info)
{
<------>struct i2c_client *client = max96722->client;
 
<------>rst_info->is_reset = max96722->hot_plug;
<------>max96722->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 max96722_set_vicap_rst_inf(struct max96722 *max96722,
<------><------><------><------>   struct rkmodule_vicap_reset_info rst_info)
{
<------>max96722->is_reset = rst_info.is_reset;
}
 
static long max96722_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
<------>struct max96722 *max96722 = to_max96722(sd);
<------>long ret = 0;
<------>u32 stream = 0;
 
<------>switch (cmd) {
<------>case RKMODULE_GET_MODULE_INFO:
<------><------>max96722_get_module_inf(max96722, (struct rkmodule_inf *)arg);
<------><------>break;
<------>case RKMODULE_SET_QUICK_STREAM:
 
<------><------>stream = *((u32 *)arg);
 
<------><------>if (stream)
<------><------><------>ret = max96722_write_reg(max96722->client,
<------><------><------><------> MAX96722_REG_CTRL_MODE,
<------><------><------><------> MAX96722_REG_VALUE_08BIT,
<------><------><------><------> MAX96722_MODE_STREAMING);
<------><------>else
<------><------><------>ret = max96722_write_reg(max96722->client,
<------><------><------><------> MAX96722_REG_CTRL_MODE,
<------><------><------><------> MAX96722_REG_VALUE_08BIT,
<------><------><------><------> MAX96722_MODE_SW_STANDBY);
<------><------>break;
<------>case RKMODULE_GET_VICAP_RST_INFO:
<------><------>max96722_get_vicap_rst_inf(max96722,
<------><------><------>(struct rkmodule_vicap_reset_info *)arg);
<------><------>break;
<------>case RKMODULE_SET_VICAP_RST_INFO:
<------><------>max96722_set_vicap_rst_inf(max96722,
<------><------><------>*(struct rkmodule_vicap_reset_info *)arg);
<------><------>break;
<------>case RKMODULE_GET_CSI_DSI_INFO:
<------><------>*(int *)arg = RKMODULE_CSI_INPUT;
<------><------>break;
<------>default:
<------><------>ret = -ENOIOCTLCMD;
<------><------>break;
<------>}
 
<------>return ret;
}
 
#ifdef CONFIG_COMPAT
static long max96722_compat_ioctl32(struct v4l2_subdev *sd,
<------><------><------><------>   unsigned int cmd, unsigned long arg)
{
<------>void __user *up = compat_ptr(arg);
<------>struct rkmodule_inf *inf;
<------>struct rkmodule_awb_cfg *cfg;
<------>struct rkmodule_vicap_reset_info *vicap_rst_inf;
<------>long ret = 0;
<------>int *seq;
<------>u32 stream = 0;
 
<------>switch (cmd) {
<------>case RKMODULE_GET_MODULE_INFO:
<------><------>inf = kzalloc(sizeof(*inf), GFP_KERNEL);
<------><------>if (!inf) {
<------><------><------>ret = -ENOMEM;
<------><------><------>return ret;
<------><------>}
 
<------><------>ret = max96722_ioctl(sd, cmd, inf);
<------><------>if (!ret) {
<------><------><------>ret = copy_to_user(up, inf, sizeof(*inf));
<------><------><------>if (ret)
<------><------><------><------>ret = -EFAULT;
<------><------>}
<------><------>kfree(inf);
<------><------>break;
<------>case RKMODULE_AWB_CFG:
<------><------>cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
<------><------>if (!cfg) {
<------><------><------>ret = -ENOMEM;
<------><------><------>return ret;
<------><------>}
 
<------><------>ret = copy_from_user(cfg, up, sizeof(*cfg));
<------><------>if (!ret)
<------><------><------>ret = max96722_ioctl(sd, cmd, cfg);
<------><------>else
<------><------><------>ret = -EFAULT;
<------><------>kfree(cfg);
<------><------>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 = max96722_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 = max96722_ioctl(sd, cmd, vicap_rst_inf);
<------><------>else
<------><------><------>ret = -EFAULT;
<------><------>kfree(vicap_rst_inf);
<------><------>break;
<------>case RKMODULE_GET_START_STREAM_SEQ:
<------><------>seq = kzalloc(sizeof(*seq), GFP_KERNEL);
<------><------>if (!seq) {
<------><------><------>ret = -ENOMEM;
<------><------><------>return ret;
<------><------>}
 
<------><------>ret = max96722_ioctl(sd, cmd, seq);
<------><------>if (!ret) {
<------><------><------>ret = copy_to_user(up, seq, sizeof(*seq));
<------><------><------>if (ret)
<------><------><------><------>ret = -EFAULT;
<------><------>}
<------><------>kfree(seq);
<------><------>break;
<------>case RKMODULE_SET_QUICK_STREAM:
<------><------>ret = copy_from_user(&stream, up, sizeof(u32));
<------><------>if (!ret)
<------><------><------>ret = max96722_ioctl(sd, cmd, &stream);
<------><------>else
<------><------><------>ret = -EFAULT;
<------><------>break;
<------>case RKMODULE_GET_CSI_DSI_INFO:
<------><------>seq = kzalloc(sizeof(*seq), GFP_KERNEL);
<------><------>if (!seq) {
<------><------><------>ret = -ENOMEM;
<------><------><------>return ret;
<------><------>}
 
<------><------>ret = max96722_ioctl(sd, cmd, seq);
<------><------>if (!ret) {
<------><------><------>ret = copy_to_user(up, seq, sizeof(*seq));
<------><------><------>if (ret)
<------><------><------><------>ret = -EFAULT;
<------><------>}
<------><------>kfree(seq);
<------><------>break;
<------>default:
<------><------>ret = -ENOIOCTLCMD;
<------><------>break;
<------>}
 
<------>return ret;
}
#endif
 
static int __max96722_start_stream(struct max96722 *max96722)
{
<------>int ret;
 
<------>ret = max96722_write_array(max96722->client, max96722->cur_mode->reg_list);
<------>if (ret)
<------><------>return ret;
 
<------>/* In case these controls are set before streaming */
<------>mutex_unlock(&max96722->mutex);
<------>ret = v4l2_ctrl_handler_setup(&max96722->ctrl_handler);
<------>mutex_lock(&max96722->mutex);
<------>if (ret)
<------><------>return ret;
 
<------>return max96722_write_reg(max96722->client,
<------><------><------><------> MAX96722_REG_CTRL_MODE,
<------><------><------><------> MAX96722_REG_VALUE_08BIT,
<------><------><------><------> MAX96722_MODE_STREAMING);
}
 
static int __max96722_stop_stream(struct max96722 *max96722)
{
<------>return max96722_write_reg(max96722->client,
<------><------><------><------> MAX96722_REG_CTRL_MODE,
<------><------><------><------> MAX96722_REG_VALUE_08BIT,
<------><------><------><------> MAX96722_MODE_SW_STANDBY);
}
 
static int max96722_s_stream(struct v4l2_subdev *sd, int on)
{
<------>struct max96722 *max96722 = to_max96722(sd);
<------>struct i2c_client *client = max96722->client;
<------>int ret = 0;
 
<------>dev_info(&client->dev, "%s: on: %d, %dx%d@%d\n", __func__, on,
<------><------><------><------>max96722->cur_mode->width,
<------><------><------><------>max96722->cur_mode->height,
<------><------>DIV_ROUND_CLOSEST(max96722->cur_mode->max_fps.denominator,
<------><------><------><------>  max96722->cur_mode->max_fps.numerator));
 
<------>mutex_lock(&max96722->mutex);
<------>on = !!on;
<------>if (on == max96722->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 = __max96722_start_stream(max96722);
<------><------>if (ret) {
<------><------><------>v4l2_err(sd, "start stream failed while write regs\n");
<------><------><------>pm_runtime_put(&client->dev);
<------><------><------>goto unlock_and_return;
<------><------>}
<------>} else {
<------><------>__max96722_stop_stream(max96722);
<------><------>pm_runtime_put(&client->dev);
<------>}
 
<------>max96722->streaming = on;
 
unlock_and_return:
<------>mutex_unlock(&max96722->mutex);
 
<------>return ret;
}
 
static int max96722_s_power(struct v4l2_subdev *sd, int on)
{
<------>struct max96722 *max96722 = to_max96722(sd);
<------>struct i2c_client *client = max96722->client;
<------>int ret = 0;
 
<------>mutex_lock(&max96722->mutex);
 
<------>/* If the power state is not modified - no work to do. */
<------>if (max96722->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;
<------><------>}
 
<------><------>max96722->power_on = true;
<------>} else {
<------><------>pm_runtime_put(&client->dev);
<------><------>max96722->power_on = false;
<------>}
 
unlock_and_return:
<------>mutex_unlock(&max96722->mutex);
 
<------>return ret;
}
 
/* Calculate the delay in us by clock rate and clock cycles */
static inline u32 max96722_cal_delay(u32 cycles)
{
<------>return DIV_ROUND_UP(cycles, MAX96722_XVCLK_FREQ / 1000 / 1000);
}
 
static int __max96722_power_on(struct max96722 *max96722)
{
<------>int ret;
<------>u32 delay_us;
<------>struct device *dev = &max96722->client->dev;
 
<------>if (!IS_ERR(max96722->power_gpio))
<------><------>gpiod_set_value_cansleep(max96722->power_gpio, 1);
 
<------>usleep_range(1000, 2000);
 
<------>if (!IS_ERR_OR_NULL(max96722->pins_default)) {
<------><------>ret = pinctrl_select_state(max96722->pinctrl,
<------><------><------><------><------>   max96722->pins_default);
<------><------>if (ret < 0)
<------><------><------>dev_err(dev, "could not set pins\n");
<------>}
 
<------>if (!IS_ERR(max96722->reset_gpio))
<------><------>gpiod_set_value_cansleep(max96722->reset_gpio, 0);
 
<------>ret = regulator_bulk_enable(MAX96722_NUM_SUPPLIES, max96722->supplies);
<------>if (ret < 0) {
<------><------>dev_err(dev, "Failed to enable regulators\n");
<------><------>goto disable_clk;
<------>}
 
<------>if (!IS_ERR(max96722->reset_gpio))
<------><------>gpiod_set_value_cansleep(max96722->reset_gpio, 1);
 
<------>usleep_range(500, 1000);
<------>if (!IS_ERR(max96722->pwdn_gpio))
<------><------>gpiod_set_value_cansleep(max96722->pwdn_gpio, 1);
 
<------>/* 8192 cycles prior to first SCCB transaction */
<------>delay_us = max96722_cal_delay(8192);
<------>usleep_range(delay_us, delay_us * 2);
 
<------>return 0;
 
disable_clk:
<------>clk_disable_unprepare(max96722->xvclk);
 
<------>return ret;
}
 
static void __max96722_power_off(struct max96722 *max96722)
{
<------>int ret;
<------>struct device *dev = &max96722->client->dev;
 
<------>if (!IS_ERR(max96722->pwdn_gpio))
<------><------>gpiod_set_value_cansleep(max96722->pwdn_gpio, 0);
<------>clk_disable_unprepare(max96722->xvclk);
<------>if (!IS_ERR(max96722->reset_gpio))
<------><------>gpiod_set_value_cansleep(max96722->reset_gpio, 0);
 
<------>if (!IS_ERR_OR_NULL(max96722->pins_sleep)) {
<------><------>ret = pinctrl_select_state(max96722->pinctrl,
<------><------><------><------><------>   max96722->pins_sleep);
<------><------>if (ret < 0)
<------><------><------>dev_dbg(dev, "could not set pins\n");
<------>}
<------>if (!IS_ERR(max96722->power_gpio))
<------><------>gpiod_set_value_cansleep(max96722->power_gpio, 0);
 
<------>regulator_bulk_disable(MAX96722_NUM_SUPPLIES, max96722->supplies);
}
 
static int max96722_runtime_resume(struct device *dev)
{
<------>struct i2c_client *client = to_i2c_client(dev);
<------>struct v4l2_subdev *sd = i2c_get_clientdata(client);
<------>struct max96722 *max96722 = to_max96722(sd);
 
<------>return __max96722_power_on(max96722);
}
 
static int max96722_runtime_suspend(struct device *dev)
{
<------>struct i2c_client *client = to_i2c_client(dev);
<------>struct v4l2_subdev *sd = i2c_get_clientdata(client);
<------>struct max96722 *max96722 = to_max96722(sd);
 
<------>__max96722_power_off(max96722);
 
<------>return 0;
}
 
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static int max96722_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
<------>struct max96722 *max96722 = to_max96722(sd);
<------>struct v4l2_mbus_framefmt *try_fmt =
<------><------><------><------>v4l2_subdev_get_try_format(sd, fh->pad, 0);
<------>const struct max96722_mode *def_mode = &supported_modes[0];
 
<------>mutex_lock(&max96722->mutex);
<------>/* Initialize try_fmt */
<------>try_fmt->width = def_mode->width;
<------>try_fmt->height = def_mode->height;
<------>try_fmt->code = MAX96722_MEDIA_BUS_FMT;
<------>try_fmt->field = V4L2_FIELD_NONE;
 
<------>mutex_unlock(&max96722->mutex);
<------>/* No crop or compose */
 
<------>return 0;
}
#endif
 
static int max96722_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;
 
<------>if (fie->code != MAX96722_MEDIA_BUS_FMT)
<------><------>return -EINVAL;
 
<------>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 max96722_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 max96722_get_selection(struct v4l2_subdev *sd,
<------><------><------><------>struct v4l2_subdev_pad_config *cfg,
<------><------><------><------>struct v4l2_subdev_selection *sel)
{
<------>struct max96722 *max96722 = to_max96722(sd);
 
<------>if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) {
<------><------>sel->r.left = 0;
<------><------>sel->r.width = max96722->cur_mode->width;
<------><------>sel->r.top = 0;
<------><------>sel->r.height = max96722->cur_mode->height;
<------><------>return 0;
<------>}
 
<------>return -EINVAL;
}
 
static const struct dev_pm_ops max96722_pm_ops = {
<------>SET_RUNTIME_PM_OPS(max96722_runtime_suspend,
<------><------><------>   max96722_runtime_resume, NULL)
};
 
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
static const struct v4l2_subdev_internal_ops max96722_internal_ops = {
<------>.open = max96722_open,
};
#endif
 
static const struct v4l2_subdev_core_ops max96722_core_ops = {
<------>.s_power = max96722_s_power,
<------>.ioctl = max96722_ioctl,
#ifdef CONFIG_COMPAT
<------>.compat_ioctl32 = max96722_compat_ioctl32,
#endif
};
 
static const struct v4l2_subdev_video_ops max96722_video_ops = {
<------>.s_stream = max96722_s_stream,
<------>.g_frame_interval = max96722_g_frame_interval,
};
 
static const struct v4l2_subdev_pad_ops max96722_pad_ops = {
<------>.enum_mbus_code = max96722_enum_mbus_code,
<------>.enum_frame_size = max96722_enum_frame_sizes,
<------>.enum_frame_interval = max96722_enum_frame_interval,
<------>.get_fmt = max96722_get_fmt,
<------>.set_fmt = max96722_set_fmt,
<------>.get_selection = max96722_get_selection,
<------>.get_mbus_config = max96722_g_mbus_config,
};
 
static const struct v4l2_subdev_ops max96722_subdev_ops = {
<------>.core	= &max96722_core_ops,
<------>.video	= &max96722_video_ops,
<------>.pad	= &max96722_pad_ops,
};
 
static int max96722_initialize_controls(struct max96722 *max96722)
{
<------>const struct max96722_mode *mode;
<------>struct v4l2_ctrl_handler *handler;
<------>int ret;
 
<------>handler = &max96722->ctrl_handler;
 
<------>mode = max96722->cur_mode;
<------>ret = v4l2_ctrl_handler_init(handler, 2);
<------>if (ret)
<------><------>return ret;
<------>handler->lock = &max96722->mutex;
 
<------>max96722->link_freq = v4l2_ctrl_new_int_menu(handler, NULL,
<------><------><------>V4L2_CID_LINK_FREQ,
<------><------><------>1, 0, link_freq_items);
 
<------>max96722->pixel_rate = v4l2_ctrl_new_std(handler, NULL,
<------><------><------>V4L2_CID_PIXEL_RATE,
<------><------><------>0, MAX96722_PIXEL_RATE,
<------><------><------>1, MAX96722_PIXEL_RATE);
 
<------>__v4l2_ctrl_s_ctrl(max96722->link_freq,
<------><------><------>   mode->link_freq_idx);
 
<------>if (handler->error) {
<------><------>ret = handler->error;
<------><------>dev_err(&max96722->client->dev,
<------><------><------>"Failed to init controls(%d)\n", ret);
<------><------>goto err_free_handler;
<------>}
 
<------>max96722->subdev.ctrl_handler = handler;
 
<------>return 0;
 
err_free_handler:
<------>v4l2_ctrl_handler_free(handler);
 
<------>return ret;
}
 
static int max96722_check_sensor_id(struct max96722 *max96722,
<------><------><------><------>   struct i2c_client *client)
{
<------>struct device *dev = &max96722->client->dev;
<------>u32 id = 0;
<------>int ret;
 
<------>ret = max96722_read_reg(client, MAX96722_REG_CHIP_ID,
<------><------><------>       MAX96722_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 sensor\n", id);
 
<------>return 0;
}
 
static int max96722_configure_regulators(struct max96722 *max96722)
{
<------>unsigned int i;
 
<------>for (i = 0; i < MAX96722_NUM_SUPPLIES; i++)
<------><------>max96722->supplies[i].supply = max96722_supply_names[i];
 
<------>return devm_regulator_bulk_get(&max96722->client->dev,
<------><------><------><------><------>MAX96722_NUM_SUPPLIES,
<------><------><------><------><------>max96722->supplies);
}
 
static int max96722_probe(struct i2c_client *client,
<------><------><------> const struct i2c_device_id *id)
{
<------>struct device *dev = &client->dev;
<------>struct device_node *node = dev->of_node;
<------>struct max96722 *max96722;
<------>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);
 
<------>max96722 = devm_kzalloc(dev, sizeof(*max96722), GFP_KERNEL);
<------>if (!max96722)
<------><------>return -ENOMEM;
 
<------>ret = of_property_read_u32(node, RKMODULE_CAMERA_MODULE_INDEX,
<------><------><------><------>   &max96722->module_index);
<------>ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_FACING,
<------><------><------><------>       &max96722->module_facing);
<------>ret |= of_property_read_string(node, RKMODULE_CAMERA_MODULE_NAME,
<------><------><------><------>       &max96722->module_name);
<------>ret |= of_property_read_string(node, RKMODULE_CAMERA_LENS_NAME,
<------><------><------><------>       &max96722->len_name);
<------>if (ret) {
<------><------>dev_err(dev, "could not get module information!\n");
<------><------>return -EINVAL;
<------>}
 
<------>max96722->client = client;
<------>max96722->cur_mode = &supported_modes[0];
 
<------>max96722->power_gpio = devm_gpiod_get(dev, "power", GPIOD_OUT_LOW);
<------>if (IS_ERR(max96722->power_gpio))
<------><------>dev_warn(dev, "Failed to get power-gpios, maybe no use\n");
 
<------>max96722->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
<------>if (IS_ERR(max96722->reset_gpio))
<------><------>dev_warn(dev, "Failed to get reset-gpios\n");
 
<------>max96722->pwdn_gpio = devm_gpiod_get(dev, "pwdn", GPIOD_OUT_LOW);
<------>if (IS_ERR(max96722->pwdn_gpio))
<------><------>dev_warn(dev, "Failed to get pwdn-gpios\n");
 
<------>ret = max96722_configure_regulators(max96722);
<------>if (ret) {
<------><------>dev_err(dev, "Failed to get power regulators\n");
<------><------>return ret;
<------>}
 
<------>max96722->pinctrl = devm_pinctrl_get(dev);
<------>if (!IS_ERR(max96722->pinctrl)) {
<------><------>max96722->pins_default =
<------><------><------>pinctrl_lookup_state(max96722->pinctrl,
<------><------><------><------><------>     OF_CAMERA_PINCTRL_STATE_DEFAULT);
<------><------>if (IS_ERR(max96722->pins_default))
<------><------><------>dev_err(dev, "could not get default pinstate\n");
 
<------><------>max96722->pins_sleep =
<------><------><------>pinctrl_lookup_state(max96722->pinctrl,
<------><------><------><------><------>     OF_CAMERA_PINCTRL_STATE_SLEEP);
<------><------>if (IS_ERR(max96722->pins_sleep))
<------><------><------>dev_err(dev, "could not get sleep pinstate\n");
<------>}
 
<------>mutex_init(&max96722->mutex);
 
<------>sd = &max96722->subdev;
<------>v4l2_i2c_subdev_init(sd, client, &max96722_subdev_ops);
<------>ret = max96722_initialize_controls(max96722);
<------>if (ret)
<------><------>goto err_destroy_mutex;
 
<------>ret = __max96722_power_on(max96722);
<------>if (ret)
<------><------>goto err_free_handler;
 
<------>ret = max96722_write_reg(max96722->client,
<------><------><------><------> MAX96722_REMOTE_CTRL,
<------><------><------><------> MAX96722_REG_VALUE_08BIT,
<------><------><------><------> MAX96722_REMOTE_DISABLE);
<------>if (ret) {
<------><------>dev_err(dev, "disable i2c remote control error\n");
<------><------>goto err_power_off;
<------>}
 
<------>ret = max96722_check_sensor_id(max96722, client);
<------>if (ret)
<------><------>goto err_power_off;
 
#ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
<------>sd->internal_ops = &max96722_internal_ops;
<------>sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
#endif
#if defined(CONFIG_MEDIA_CONTROLLER)
<------>max96722->pad.flags = MEDIA_PAD_FL_SOURCE;
<------>sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
<------>ret = media_entity_pads_init(&sd->entity, 1, &max96722->pad);
<------>if (ret < 0)
<------><------>goto err_power_off;
#endif
 
<------>memset(facing, 0, sizeof(facing));
<------>if (strcmp(max96722->module_facing, "back") == 0)
<------><------>facing[0] = 'b';
<------>else
<------><------>facing[0] = 'f';
 
<------>snprintf(sd->name, sizeof(sd->name), "m%02d_%s_%s %s",
<------><------> max96722->module_index, facing,
<------><------> MAX96722_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:
<------>__max96722_power_off(max96722);
err_free_handler:
<------>v4l2_ctrl_handler_free(&max96722->ctrl_handler);
err_destroy_mutex:
<------>mutex_destroy(&max96722->mutex);
 
<------>return ret;
}
 
static int max96722_remove(struct i2c_client *client)
{
<------>struct v4l2_subdev *sd = i2c_get_clientdata(client);
<------>struct max96722 *max96722 = to_max96722(sd);
 
<------>v4l2_async_unregister_subdev(sd);
#if defined(CONFIG_MEDIA_CONTROLLER)
<------>media_entity_cleanup(&sd->entity);
#endif
<------>v4l2_ctrl_handler_free(&max96722->ctrl_handler);
<------>mutex_destroy(&max96722->mutex);
 
<------>pm_runtime_disable(&client->dev);
<------>if (!pm_runtime_status_suspended(&client->dev))
<------><------>__max96722_power_off(max96722);
<------>pm_runtime_set_suspended(&client->dev);
 
<------>return 0;
}
 
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id max96722_of_match[] = {
<------>{ .compatible = "maxim,max96722" },
<------>{},
};
MODULE_DEVICE_TABLE(of, max96722_of_match);
#endif
 
static const struct i2c_device_id max96722_match_id[] = {
<------>{ "maxim,max96722", 0 },
<------>{},
};
 
static struct i2c_driver max96722_i2c_driver = {
<------>.driver = {
<------><------>.name = MAX96722_NAME,
<------><------>.pm = &max96722_pm_ops,
<------><------>.of_match_table = of_match_ptr(max96722_of_match),
<------>},
<------>.probe		= &max96722_probe,
<------>.remove		= &max96722_remove,
<------>.id_table	= max96722_match_id,
};
 
static int __init sensor_mod_init(void)
{
<------>return i2c_add_driver(&max96722_i2c_driver);
}
 
static void __exit sensor_mod_exit(void)
{
<------>i2c_del_driver(&max96722_i2c_driver);
}
 
device_initcall_sync(sensor_mod_init);
module_exit(sensor_mod_exit);
 
MODULE_DESCRIPTION("Maxim max96722 deserializer driver");
MODULE_LICENSE("GPL");