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linux/drivers/media/i2c/ov5647.c
Kuninori Morimoto c188df3db1 media: i2c: replace of_graph_get_next_endpoint() 
From DT point of view, in general, drivers should be asking for a
specific port number because their function is fixed in the binding.

of_graph_get_next_endpoint() doesn't match to this concept.

Simply replace

	- of_graph_get_next_endpoint(xxx, NULL);
	+ of_graph_get_endpoint_by_regs(xxx, 0, -1);

Link: https://lore.kernel.org/r/20240202174941.GA310089-robh@kernel.org
Link: https://lore.kernel.org/r/9d1e99b0-892d-4a72-a9b3-886b8ed094b0@xs4all.nl
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2024-02-23 14:33:32 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* A V4L2 driver for OmniVision OV5647 cameras.
*
* Based on Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor driver
* Copyright (C) 2011 Sylwester Nawrocki <s.nawrocki@samsung.com>
*
* Based on Omnivision OV7670 Camera Driver
* Copyright (C) 2006-7 Jonathan Corbet <corbet@lwn.net>
*
* Copyright (C) 2016, Synopsys, Inc.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-image-sizes.h>
#include <media/v4l2-mediabus.h>
/*
* From the datasheet, "20ms after PWDN goes low or 20ms after RESETB goes
* high if reset is inserted after PWDN goes high, host can access sensor's
* SCCB to initialize sensor."
*/
#define PWDN_ACTIVE_DELAY_MS 20
#define MIPI_CTRL00_CLOCK_LANE_GATE BIT(5)
#define MIPI_CTRL00_LINE_SYNC_ENABLE BIT(4)
#define MIPI_CTRL00_BUS_IDLE BIT(2)
#define MIPI_CTRL00_CLOCK_LANE_DISABLE BIT(0)
#define OV5647_SW_STANDBY 0x0100
#define OV5647_SW_RESET 0x0103
#define OV5647_REG_CHIPID_H 0x300a
#define OV5647_REG_CHIPID_L 0x300b
#define OV5640_REG_PAD_OUT 0x300d
#define OV5647_REG_EXP_HI 0x3500
#define OV5647_REG_EXP_MID 0x3501
#define OV5647_REG_EXP_LO 0x3502
#define OV5647_REG_AEC_AGC 0x3503
#define OV5647_REG_GAIN_HI 0x350a
#define OV5647_REG_GAIN_LO 0x350b
#define OV5647_REG_VTS_HI 0x380e
#define OV5647_REG_VTS_LO 0x380f
#define OV5647_REG_FRAME_OFF_NUMBER 0x4202
#define OV5647_REG_MIPI_CTRL00 0x4800
#define OV5647_REG_MIPI_CTRL14 0x4814
#define OV5647_REG_AWB 0x5001
#define OV5647_REG_ISPCTRL3D 0x503d
#define REG_TERM 0xfffe
#define VAL_TERM 0xfe
#define REG_DLY 0xffff
/* OV5647 native and active pixel array size */
#define OV5647_NATIVE_WIDTH 2624U
#define OV5647_NATIVE_HEIGHT 1956U
#define OV5647_PIXEL_ARRAY_LEFT 16U
#define OV5647_PIXEL_ARRAY_TOP 16U
#define OV5647_PIXEL_ARRAY_WIDTH 2592U
#define OV5647_PIXEL_ARRAY_HEIGHT 1944U
#define OV5647_VBLANK_MIN 4
#define OV5647_VTS_MAX 32767
#define OV5647_EXPOSURE_MIN 4
#define OV5647_EXPOSURE_STEP 1
#define OV5647_EXPOSURE_DEFAULT 1000
#define OV5647_EXPOSURE_MAX 65535
struct regval_list {
u16 addr;
u8 data;
};
struct ov5647_mode {
struct v4l2_mbus_framefmt format;
struct v4l2_rect crop;
u64 pixel_rate;
int hts;
int vts;
const struct regval_list *reg_list;
unsigned int num_regs;
};
struct ov5647 {
struct v4l2_subdev sd;
struct media_pad pad;
struct mutex lock;
struct clk *xclk;
struct gpio_desc *pwdn;
bool clock_ncont;
struct v4l2_ctrl_handler ctrls;
const struct ov5647_mode *mode;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *vblank;
struct v4l2_ctrl *exposure;
};
static inline struct ov5647 *to_sensor(struct v4l2_subdev *sd)
{
return container_of(sd, struct ov5647, sd);
}
static const char * const ov5647_test_pattern_menu[] = {
"Disabled",
"Color Bars",
"Color Squares",
"Random Data",
};
static const u8 ov5647_test_pattern_val[] = {
0x00, /* Disabled */
0x80, /* Color Bars */
0x82, /* Color Squares */
0x81, /* Random Data */
};
static const struct regval_list sensor_oe_disable_regs[] = {
{0x3000, 0x00},
{0x3001, 0x00},
{0x3002, 0x00},
};
static const struct regval_list sensor_oe_enable_regs[] = {
{0x3000, 0x0f},
{0x3001, 0xff},
{0x3002, 0xe4},
};
static struct regval_list ov5647_2592x1944_10bpp[] = {
{0x0100, 0x00},
{0x0103, 0x01},
{0x3034, 0x1a},
{0x3035, 0x21},
{0x3036, 0x69},
{0x303c, 0x11},
{0x3106, 0xf5},
{0x3821, 0x06},
{0x3820, 0x00},
{0x3827, 0xec},
{0x370c, 0x03},
{0x3612, 0x5b},
{0x3618, 0x04},
{0x5000, 0x06},
{0x5002, 0x41},
{0x5003, 0x08},
{0x5a00, 0x08},
{0x3000, 0x00},
{0x3001, 0x00},
{0x3002, 0x00},
{0x3016, 0x08},
{0x3017, 0xe0},
{0x3018, 0x44},
{0x301c, 0xf8},
{0x301d, 0xf0},
{0x3a18, 0x00},
{0x3a19, 0xf8},
{0x3c01, 0x80},
{0x3b07, 0x0c},
{0x380c, 0x0b},
{0x380d, 0x1c},
{0x3814, 0x11},
{0x3815, 0x11},
{0x3708, 0x64},
{0x3709, 0x12},
{0x3808, 0x0a},
{0x3809, 0x20},
{0x380a, 0x07},
{0x380b, 0x98},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x0a},
{0x3805, 0x3f},
{0x3806, 0x07},
{0x3807, 0xa3},
{0x3811, 0x10},
{0x3813, 0x06},
{0x3630, 0x2e},
{0x3632, 0xe2},
{0x3633, 0x23},
{0x3634, 0x44},
{0x3636, 0x06},
{0x3620, 0x64},
{0x3621, 0xe0},
{0x3600, 0x37},
{0x3704, 0xa0},
{0x3703, 0x5a},
{0x3715, 0x78},
{0x3717, 0x01},
{0x3731, 0x02},
{0x370b, 0x60},
{0x3705, 0x1a},
{0x3f05, 0x02},
{0x3f06, 0x10},
{0x3f01, 0x0a},
{0x3a08, 0x01},
{0x3a09, 0x28},
{0x3a0a, 0x00},
{0x3a0b, 0xf6},
{0x3a0d, 0x08},
{0x3a0e, 0x06},
{0x3a0f, 0x58},
{0x3a10, 0x50},
{0x3a1b, 0x58},
{0x3a1e, 0x50},
{0x3a11, 0x60},
{0x3a1f, 0x28},
{0x4001, 0x02},
{0x4004, 0x04},
{0x4000, 0x09},
{0x4837, 0x19},
{0x4800, 0x24},
{0x3503, 0x03},
{0x0100, 0x01},
};
static struct regval_list ov5647_1080p30_10bpp[] = {
{0x0100, 0x00},
{0x0103, 0x01},
{0x3034, 0x1a},
{0x3035, 0x21},
{0x3036, 0x62},
{0x303c, 0x11},
{0x3106, 0xf5},
{0x3821, 0x06},
{0x3820, 0x00},
{0x3827, 0xec},
{0x370c, 0x03},
{0x3612, 0x5b},
{0x3618, 0x04},
{0x5000, 0x06},
{0x5002, 0x41},
{0x5003, 0x08},
{0x5a00, 0x08},
{0x3000, 0x00},
{0x3001, 0x00},
{0x3002, 0x00},
{0x3016, 0x08},
{0x3017, 0xe0},
{0x3018, 0x44},
{0x301c, 0xf8},
{0x301d, 0xf0},
{0x3a18, 0x00},
{0x3a19, 0xf8},
{0x3c01, 0x80},
{0x3b07, 0x0c},
{0x380c, 0x09},
{0x380d, 0x70},
{0x3814, 0x11},
{0x3815, 0x11},
{0x3708, 0x64},
{0x3709, 0x12},
{0x3808, 0x07},
{0x3809, 0x80},
{0x380a, 0x04},
{0x380b, 0x38},
{0x3800, 0x01},
{0x3801, 0x5c},
{0x3802, 0x01},
{0x3803, 0xb2},
{0x3804, 0x08},
{0x3805, 0xe3},
{0x3806, 0x05},
{0x3807, 0xf1},
{0x3811, 0x04},
{0x3813, 0x02},
{0x3630, 0x2e},
{0x3632, 0xe2},
{0x3633, 0x23},
{0x3634, 0x44},
{0x3636, 0x06},
{0x3620, 0x64},
{0x3621, 0xe0},
{0x3600, 0x37},
{0x3704, 0xa0},
{0x3703, 0x5a},
{0x3715, 0x78},
{0x3717, 0x01},
{0x3731, 0x02},
{0x370b, 0x60},
{0x3705, 0x1a},
{0x3f05, 0x02},
{0x3f06, 0x10},
{0x3f01, 0x0a},
{0x3a08, 0x01},
{0x3a09, 0x4b},
{0x3a0a, 0x01},
{0x3a0b, 0x13},
{0x3a0d, 0x04},
{0x3a0e, 0x03},
{0x3a0f, 0x58},
{0x3a10, 0x50},
{0x3a1b, 0x58},
{0x3a1e, 0x50},
{0x3a11, 0x60},
{0x3a1f, 0x28},
{0x4001, 0x02},
{0x4004, 0x04},
{0x4000, 0x09},
{0x4837, 0x19},
{0x4800, 0x34},
{0x3503, 0x03},
{0x0100, 0x01},
};
static struct regval_list ov5647_2x2binned_10bpp[] = {
{0x0100, 0x00},
{0x0103, 0x01},
{0x3034, 0x1a},
{0x3035, 0x21},
{0x3036, 0x62},
{0x303c, 0x11},
{0x3106, 0xf5},
{0x3827, 0xec},
{0x370c, 0x03},
{0x3612, 0x59},
{0x3618, 0x00},
{0x5000, 0x06},
{0x5002, 0x41},
{0x5003, 0x08},
{0x5a00, 0x08},
{0x3000, 0x00},
{0x3001, 0x00},
{0x3002, 0x00},
{0x3016, 0x08},
{0x3017, 0xe0},
{0x3018, 0x44},
{0x301c, 0xf8},
{0x301d, 0xf0},
{0x3a18, 0x00},
{0x3a19, 0xf8},
{0x3c01, 0x80},
{0x3b07, 0x0c},
{0x3800, 0x00},
{0x3801, 0x00},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x0a},
{0x3805, 0x3f},
{0x3806, 0x07},
{0x3807, 0xa3},
{0x3808, 0x05},
{0x3809, 0x10},
{0x380a, 0x03},
{0x380b, 0xcc},
{0x380c, 0x07},
{0x380d, 0x68},
{0x3811, 0x0c},
{0x3813, 0x06},
{0x3814, 0x31},
{0x3815, 0x31},
{0x3630, 0x2e},
{0x3632, 0xe2},
{0x3633, 0x23},
{0x3634, 0x44},
{0x3636, 0x06},
{0x3620, 0x64},
{0x3621, 0xe0},
{0x3600, 0x37},
{0x3704, 0xa0},
{0x3703, 0x5a},
{0x3715, 0x78},
{0x3717, 0x01},
{0x3731, 0x02},
{0x370b, 0x60},
{0x3705, 0x1a},
{0x3f05, 0x02},
{0x3f06, 0x10},
{0x3f01, 0x0a},
{0x3a08, 0x01},
{0x3a09, 0x28},
{0x3a0a, 0x00},
{0x3a0b, 0xf6},
{0x3a0d, 0x08},
{0x3a0e, 0x06},
{0x3a0f, 0x58},
{0x3a10, 0x50},
{0x3a1b, 0x58},
{0x3a1e, 0x50},
{0x3a11, 0x60},
{0x3a1f, 0x28},
{0x4001, 0x02},
{0x4004, 0x04},
{0x4000, 0x09},
{0x4837, 0x16},
{0x4800, 0x24},
{0x3503, 0x03},
{0x3820, 0x41},
{0x3821, 0x07},
{0x350a, 0x00},
{0x350b, 0x10},
{0x3500, 0x00},
{0x3501, 0x1a},
{0x3502, 0xf0},
{0x3212, 0xa0},
{0x0100, 0x01},
};
static struct regval_list ov5647_640x480_10bpp[] = {
{0x0100, 0x00},
{0x0103, 0x01},
{0x3035, 0x11},
{0x3036, 0x46},
{0x303c, 0x11},
{0x3821, 0x07},
{0x3820, 0x41},
{0x370c, 0x03},
{0x3612, 0x59},
{0x3618, 0x00},
{0x5000, 0x06},
{0x5003, 0x08},
{0x5a00, 0x08},
{0x3000, 0xff},
{0x3001, 0xff},
{0x3002, 0xff},
{0x301d, 0xf0},
{0x3a18, 0x00},
{0x3a19, 0xf8},
{0x3c01, 0x80},
{0x3b07, 0x0c},
{0x380c, 0x07},
{0x380d, 0x3c},
{0x3814, 0x35},
{0x3815, 0x35},
{0x3708, 0x64},
{0x3709, 0x52},
{0x3808, 0x02},
{0x3809, 0x80},
{0x380a, 0x01},
{0x380b, 0xe0},
{0x3800, 0x00},
{0x3801, 0x10},
{0x3802, 0x00},
{0x3803, 0x00},
{0x3804, 0x0a},
{0x3805, 0x2f},
{0x3806, 0x07},
{0x3807, 0x9f},
{0x3630, 0x2e},
{0x3632, 0xe2},
{0x3633, 0x23},
{0x3634, 0x44},
{0x3620, 0x64},
{0x3621, 0xe0},
{0x3600, 0x37},
{0x3704, 0xa0},
{0x3703, 0x5a},
{0x3715, 0x78},
{0x3717, 0x01},
{0x3731, 0x02},
{0x370b, 0x60},
{0x3705, 0x1a},
{0x3f05, 0x02},
{0x3f06, 0x10},
{0x3f01, 0x0a},
{0x3a08, 0x01},
{0x3a09, 0x2e},
{0x3a0a, 0x00},
{0x3a0b, 0xfb},
{0x3a0d, 0x02},
{0x3a0e, 0x01},
{0x3a0f, 0x58},
{0x3a10, 0x50},
{0x3a1b, 0x58},
{0x3a1e, 0x50},
{0x3a11, 0x60},
{0x3a1f, 0x28},
{0x4001, 0x02},
{0x4004, 0x02},
{0x4000, 0x09},
{0x3000, 0x00},
{0x3001, 0x00},
{0x3002, 0x00},
{0x3017, 0xe0},
{0x301c, 0xfc},
{0x3636, 0x06},
{0x3016, 0x08},
{0x3827, 0xec},
{0x3018, 0x44},
{0x3035, 0x21},
{0x3106, 0xf5},
{0x3034, 0x1a},
{0x301c, 0xf8},
{0x4800, 0x34},
{0x3503, 0x03},
{0x0100, 0x01},
};
static const struct ov5647_mode ov5647_modes[] = {
/* 2592x1944 full resolution full FOV 10-bit mode. */
{
.format = {
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.colorspace = V4L2_COLORSPACE_SRGB,
.field = V4L2_FIELD_NONE,
.width = 2592,
.height = 1944
},
.crop = {
.left = OV5647_PIXEL_ARRAY_LEFT,
.top = OV5647_PIXEL_ARRAY_TOP,
.width = 2592,
.height = 1944
},
.pixel_rate = 87500000,
.hts = 2844,
.vts = 0x7b0,
.reg_list = ov5647_2592x1944_10bpp,
.num_regs = ARRAY_SIZE(ov5647_2592x1944_10bpp)
},
/* 1080p30 10-bit mode. Full resolution centre-cropped down to 1080p. */
{
.format = {
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.colorspace = V4L2_COLORSPACE_SRGB,
.field = V4L2_FIELD_NONE,
.width = 1920,
.height = 1080
},
.crop = {
.left = 348 + OV5647_PIXEL_ARRAY_LEFT,
.top = 434 + OV5647_PIXEL_ARRAY_TOP,
.width = 1928,
.height = 1080,
},
.pixel_rate = 81666700,
.hts = 2416,
.vts = 0x450,
.reg_list = ov5647_1080p30_10bpp,
.num_regs = ARRAY_SIZE(ov5647_1080p30_10bpp)
},
/* 2x2 binned full FOV 10-bit mode. */
{
.format = {
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.colorspace = V4L2_COLORSPACE_SRGB,
.field = V4L2_FIELD_NONE,
.width = 1296,
.height = 972
},
.crop = {
.left = OV5647_PIXEL_ARRAY_LEFT,
.top = OV5647_PIXEL_ARRAY_TOP,
.width = 2592,
.height = 1944,
},
.pixel_rate = 81666700,
.hts = 1896,
.vts = 0x59b,
.reg_list = ov5647_2x2binned_10bpp,
.num_regs = ARRAY_SIZE(ov5647_2x2binned_10bpp)
},
/* 10-bit VGA full FOV 60fps. 2x2 binned and subsampled down to VGA. */
{
.format = {
.code = MEDIA_BUS_FMT_SBGGR10_1X10,
.colorspace = V4L2_COLORSPACE_SRGB,
.field = V4L2_FIELD_NONE,
.width = 640,
.height = 480
},
.crop = {
.left = 16 + OV5647_PIXEL_ARRAY_LEFT,
.top = OV5647_PIXEL_ARRAY_TOP,
.width = 2560,
.height = 1920,
},
.pixel_rate = 55000000,
.hts = 1852,
.vts = 0x1f8,
.reg_list = ov5647_640x480_10bpp,
.num_regs = ARRAY_SIZE(ov5647_640x480_10bpp)
},
};
/* Default sensor mode is 2x2 binned 640x480 SBGGR10_1X10. */
#define OV5647_DEFAULT_MODE (&ov5647_modes[3])
#define OV5647_DEFAULT_FORMAT (ov5647_modes[3].format)
static int ov5647_write16(struct v4l2_subdev *sd, u16 reg, u16 val)
{
unsigned char data[4] = { reg >> 8, reg & 0xff, val >> 8, val & 0xff};
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
ret = i2c_master_send(client, data, 4);
if (ret < 0) {
dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
__func__, reg);
return ret;
}
return 0;
}
static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
{
unsigned char data[3] = { reg >> 8, reg & 0xff, val};
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
ret = i2c_master_send(client, data, 3);
if (ret < 0) {
dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
__func__, reg);
return ret;
}
return 0;
}
static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 buf[2] = { reg >> 8, reg & 0xff };
struct i2c_msg msg[2];
int ret;
msg[0].addr = client->addr;
msg[0].flags = client->flags;
msg[0].buf = buf;
msg[0].len = sizeof(buf);
msg[1].addr = client->addr;
msg[1].flags = client->flags | I2C_M_RD;
msg[1].buf = buf;
msg[1].len = 1;
ret = i2c_transfer(client->adapter, msg, 2);
if (ret != 2) {
dev_err(&client->dev, "%s: i2c read error, reg: %x = %d\n",
__func__, reg, ret);
return ret >= 0 ? -EINVAL : ret;
}
*val = buf[0];
return 0;
}
static int ov5647_write_array(struct v4l2_subdev *sd,
const struct regval_list *regs, int array_size)
{
int i, ret;
for (i = 0; i < array_size; i++) {
ret = ov5647_write(sd, regs[i].addr, regs[i].data);
if (ret < 0)
return ret;
}
return 0;
}
static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
{
u8 channel_id;
int ret;
ret = ov5647_read(sd, OV5647_REG_MIPI_CTRL14, &channel_id);
if (ret < 0)
return ret;
channel_id &= ~(3 << 6);
return ov5647_write(sd, OV5647_REG_MIPI_CTRL14,
channel_id | (channel << 6));
}
static int ov5647_set_mode(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5647 *sensor = to_sensor(sd);
u8 resetval, rdval;
int ret;
ret = ov5647_read(sd, OV5647_SW_STANDBY, &rdval);
if (ret < 0)
return ret;
ret = ov5647_write_array(sd, sensor->mode->reg_list,
sensor->mode->num_regs);
if (ret < 0) {
dev_err(&client->dev, "write sensor default regs error\n");
return ret;
}
ret = ov5647_set_virtual_channel(sd, 0);
if (ret < 0)
return ret;
ret = ov5647_read(sd, OV5647_SW_STANDBY, &resetval);
if (ret < 0)
return ret;
if (!(resetval & 0x01)) {
dev_err(&client->dev, "Device was in SW standby");
ret = ov5647_write(sd, OV5647_SW_STANDBY, 0x01);
if (ret < 0)
return ret;
}
return 0;
}
static int ov5647_stream_on(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5647 *sensor = to_sensor(sd);
u8 val = MIPI_CTRL00_BUS_IDLE;
int ret;
ret = ov5647_set_mode(sd);
if (ret) {
dev_err(&client->dev, "Failed to program sensor mode: %d\n", ret);
return ret;
}
/* Apply customized values from user when stream starts. */
ret = __v4l2_ctrl_handler_setup(sd->ctrl_handler);
if (ret)
return ret;
if (sensor->clock_ncont)
val |= MIPI_CTRL00_CLOCK_LANE_GATE |
MIPI_CTRL00_LINE_SYNC_ENABLE;
ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00, val);
if (ret < 0)
return ret;
ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x00);
if (ret < 0)
return ret;
return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x00);
}
static int ov5647_stream_off(struct v4l2_subdev *sd)
{
int ret;
ret = ov5647_write(sd, OV5647_REG_MIPI_CTRL00,
MIPI_CTRL00_CLOCK_LANE_GATE | MIPI_CTRL00_BUS_IDLE |
MIPI_CTRL00_CLOCK_LANE_DISABLE);
if (ret < 0)
return ret;
ret = ov5647_write(sd, OV5647_REG_FRAME_OFF_NUMBER, 0x0f);
if (ret < 0)
return ret;
return ov5647_write(sd, OV5640_REG_PAD_OUT, 0x01);
}
static int ov5647_power_on(struct device *dev)
{
struct ov5647 *sensor = dev_get_drvdata(dev);
int ret;
dev_dbg(dev, "OV5647 power on\n");
if (sensor->pwdn) {
gpiod_set_value_cansleep(sensor->pwdn, 0);
msleep(PWDN_ACTIVE_DELAY_MS);
}
ret = clk_prepare_enable(sensor->xclk);
if (ret < 0) {
dev_err(dev, "clk prepare enable failed\n");
goto error_pwdn;
}
ret = ov5647_write_array(&sensor->sd, sensor_oe_enable_regs,
ARRAY_SIZE(sensor_oe_enable_regs));
if (ret < 0) {
dev_err(dev, "write sensor_oe_enable_regs error\n");
goto error_clk_disable;
}
/* Stream off to coax lanes into LP-11 state. */
ret = ov5647_stream_off(&sensor->sd);
if (ret < 0) {
dev_err(dev, "camera not available, check power\n");
goto error_clk_disable;
}
return 0;
error_clk_disable:
clk_disable_unprepare(sensor->xclk);
error_pwdn:
gpiod_set_value_cansleep(sensor->pwdn, 1);
return ret;
}
static int ov5647_power_off(struct device *dev)
{
struct ov5647 *sensor = dev_get_drvdata(dev);
u8 rdval;
int ret;
dev_dbg(dev, "OV5647 power off\n");
ret = ov5647_write_array(&sensor->sd, sensor_oe_disable_regs,
ARRAY_SIZE(sensor_oe_disable_regs));
if (ret < 0)
dev_dbg(dev, "disable oe failed\n");
/* Enter software standby */
ret = ov5647_read(&sensor->sd, OV5647_SW_STANDBY, &rdval);
if (ret < 0)
dev_dbg(dev, "software standby failed\n");
rdval &= ~0x01;
ret = ov5647_write(&sensor->sd, OV5647_SW_STANDBY, rdval);
if (ret < 0)
dev_dbg(dev, "software standby failed\n");
clk_disable_unprepare(sensor->xclk);
gpiod_set_value_cansleep(sensor->pwdn, 1);
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
int ret;
u8 val;
ret = ov5647_read(sd, reg->reg & 0xff, &val);
if (ret < 0)
return ret;
reg->val = val;
reg->size = 1;
return 0;
}
static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff);
}
#endif
/* Subdev core operations registration */
static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = ov5647_sensor_get_register,
.s_register = ov5647_sensor_set_register,
#endif
};
static const struct v4l2_rect *
__ov5647_get_pad_crop(struct ov5647 *ov5647,
struct v4l2_subdev_state *sd_state,
unsigned int pad, enum v4l2_subdev_format_whence which)
{
switch (which) {
case V4L2_SUBDEV_FORMAT_TRY:
return v4l2_subdev_state_get_crop(sd_state, pad);
case V4L2_SUBDEV_FORMAT_ACTIVE:
return &ov5647->mode->crop;
}
return NULL;
}
static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct ov5647 *sensor = to_sensor(sd);
int ret;
mutex_lock(&sensor->lock);
if (enable) {
ret = pm_runtime_resume_and_get(&client->dev);
if (ret < 0)
goto error_unlock;
ret = ov5647_stream_on(sd);
if (ret < 0) {
dev_err(&client->dev, "stream start failed: %d\n", ret);
goto error_pm;
}
} else {
ret = ov5647_stream_off(sd);
if (ret < 0) {
dev_err(&client->dev, "stream stop failed: %d\n", ret);
goto error_pm;
}
pm_runtime_put(&client->dev);
}
mutex_unlock(&sensor->lock);
return 0;
error_pm:
pm_runtime_put(&client->dev);
error_unlock:
mutex_unlock(&sensor->lock);
return ret;
}
static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
.s_stream = ov5647_s_stream,
};
static int ov5647_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_SBGGR10_1X10;
return 0;
}
static int ov5647_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
const struct v4l2_mbus_framefmt *fmt;
if (fse->code != MEDIA_BUS_FMT_SBGGR10_1X10 ||
fse->index >= ARRAY_SIZE(ov5647_modes))
return -EINVAL;
fmt = &ov5647_modes[fse->index].format;
fse->min_width = fmt->width;
fse->max_width = fmt->width;
fse->min_height = fmt->height;
fse->max_height = fmt->height;
return 0;
}
static int ov5647_get_pad_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *fmt = &format->format;
const struct v4l2_mbus_framefmt *sensor_format;
struct ov5647 *sensor = to_sensor(sd);
mutex_lock(&sensor->lock);
switch (format->which) {
case V4L2_SUBDEV_FORMAT_TRY:
sensor_format = v4l2_subdev_state_get_format(sd_state,
format->pad);
break;
default:
sensor_format = &sensor->mode->format;
break;
}
*fmt = *sensor_format;
mutex_unlock(&sensor->lock);
return 0;
}
static int ov5647_set_pad_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *fmt = &format->format;
struct ov5647 *sensor = to_sensor(sd);
const struct ov5647_mode *mode;
mode = v4l2_find_nearest_size(ov5647_modes, ARRAY_SIZE(ov5647_modes),
format.width, format.height,
fmt->width, fmt->height);
/* Update the sensor mode and apply at it at streamon time. */
mutex_lock(&sensor->lock);
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
*v4l2_subdev_state_get_format(sd_state, format->pad) = mode->format;
} else {
int exposure_max, exposure_def;
int hblank, vblank;
sensor->mode = mode;
__v4l2_ctrl_modify_range(sensor->pixel_rate, mode->pixel_rate,
mode->pixel_rate, 1, mode->pixel_rate);
hblank = mode->hts - mode->format.width;
__v4l2_ctrl_modify_range(sensor->hblank, hblank, hblank, 1,
hblank);
vblank = mode->vts - mode->format.height;
__v4l2_ctrl_modify_range(sensor->vblank, OV5647_VBLANK_MIN,
OV5647_VTS_MAX - mode->format.height,
1, vblank);
__v4l2_ctrl_s_ctrl(sensor->vblank, vblank);
exposure_max = mode->vts - 4;
exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
__v4l2_ctrl_modify_range(sensor->exposure,
sensor->exposure->minimum,
exposure_max, sensor->exposure->step,
exposure_def);
}
*fmt = mode->format;
mutex_unlock(&sensor->lock);
return 0;
}
static int ov5647_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
switch (sel->target) {
case V4L2_SEL_TGT_CROP: {
struct ov5647 *sensor = to_sensor(sd);
mutex_lock(&sensor->lock);
sel->r = *__ov5647_get_pad_crop(sensor, sd_state, sel->pad,
sel->which);
mutex_unlock(&sensor->lock);
return 0;
}
case V4L2_SEL_TGT_NATIVE_SIZE:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = OV5647_NATIVE_WIDTH;
sel->r.height = OV5647_NATIVE_HEIGHT;
return 0;
case V4L2_SEL_TGT_CROP_DEFAULT:
case V4L2_SEL_TGT_CROP_BOUNDS:
sel->r.top = OV5647_PIXEL_ARRAY_TOP;
sel->r.left = OV5647_PIXEL_ARRAY_LEFT;
sel->r.width = OV5647_PIXEL_ARRAY_WIDTH;
sel->r.height = OV5647_PIXEL_ARRAY_HEIGHT;
return 0;
}
return -EINVAL;
}
static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = {
.enum_mbus_code = ov5647_enum_mbus_code,
.enum_frame_size = ov5647_enum_frame_size,
.set_fmt = ov5647_set_pad_fmt,
.get_fmt = ov5647_get_pad_fmt,
.get_selection = ov5647_get_selection,
};
static const struct v4l2_subdev_ops ov5647_subdev_ops = {
.core = &ov5647_subdev_core_ops,
.video = &ov5647_subdev_video_ops,
.pad = &ov5647_subdev_pad_ops,
};
static int ov5647_detect(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 read;
int ret;
ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
if (ret < 0)
return ret;
ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &read);
if (ret < 0)
return ret;
if (read != 0x56) {
dev_err(&client->dev, "ID High expected 0x56 got %x", read);
return -ENODEV;
}
ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &read);
if (ret < 0)
return ret;
if (read != 0x47) {
dev_err(&client->dev, "ID Low expected 0x47 got %x", read);
return -ENODEV;
}
return ov5647_write(sd, OV5647_SW_RESET, 0x00);
}
static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_mbus_framefmt *format =
v4l2_subdev_state_get_format(fh->state, 0);
struct v4l2_rect *crop = v4l2_subdev_state_get_crop(fh->state, 0);
crop->left = OV5647_PIXEL_ARRAY_LEFT;
crop->top = OV5647_PIXEL_ARRAY_TOP;
crop->width = OV5647_PIXEL_ARRAY_WIDTH;
crop->height = OV5647_PIXEL_ARRAY_HEIGHT;
*format = OV5647_DEFAULT_FORMAT;
return 0;
}
static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
.open = ov5647_open,
};
static int ov5647_s_auto_white_balance(struct v4l2_subdev *sd, u32 val)
{
return ov5647_write(sd, OV5647_REG_AWB, val ? 1 : 0);
}
static int ov5647_s_autogain(struct v4l2_subdev *sd, u32 val)
{
int ret;
u8 reg;
/* Non-zero turns on AGC by clearing bit 1.*/
ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
if (ret)
return ret;
return ov5647_write(sd, OV5647_REG_AEC_AGC, val ? reg & ~BIT(1)
: reg | BIT(1));
}
static int ov5647_s_exposure_auto(struct v4l2_subdev *sd, u32 val)
{
int ret;
u8 reg;
/*
* Everything except V4L2_EXPOSURE_MANUAL turns on AEC by
* clearing bit 0.
*/
ret = ov5647_read(sd, OV5647_REG_AEC_AGC, &reg);
if (ret)
return ret;
return ov5647_write(sd, OV5647_REG_AEC_AGC,
val == V4L2_EXPOSURE_MANUAL ? reg | BIT(0)
: reg & ~BIT(0));
}
static int ov5647_s_analogue_gain(struct v4l2_subdev *sd, u32 val)
{
int ret;
/* 10 bits of gain, 2 in the high register. */
ret = ov5647_write(sd, OV5647_REG_GAIN_HI, (val >> 8) & 3);
if (ret)
return ret;
return ov5647_write(sd, OV5647_REG_GAIN_LO, val & 0xff);
}
static int ov5647_s_exposure(struct v4l2_subdev *sd, u32 val)
{
int ret;
/*
* Sensor has 20 bits, but the bottom 4 bits are fractions of a line
* which we leave as zero (and don't receive in "val").
*/
ret = ov5647_write(sd, OV5647_REG_EXP_HI, (val >> 12) & 0xf);
if (ret)
return ret;
ret = ov5647_write(sd, OV5647_REG_EXP_MID, (val >> 4) & 0xff);
if (ret)
return ret;
return ov5647_write(sd, OV5647_REG_EXP_LO, (val & 0xf) << 4);
}
static int ov5647_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct ov5647 *sensor = container_of(ctrl->handler,
struct ov5647, ctrls);
struct v4l2_subdev *sd = &sensor->sd;
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret = 0;
/* v4l2_ctrl_lock() locks our own mutex */
if (ctrl->id == V4L2_CID_VBLANK) {
int exposure_max, exposure_def;
/* Update max exposure while meeting expected vblanking */
exposure_max = sensor->mode->format.height + ctrl->val - 4;
exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
__v4l2_ctrl_modify_range(sensor->exposure,
sensor->exposure->minimum,
exposure_max, sensor->exposure->step,
exposure_def);
}
/*
* If the device is not powered up do not apply any controls
* to H/W at this time. Instead the controls will be restored
* at s_stream(1) time.
*/
if (pm_runtime_get_if_in_use(&client->dev) == 0)
return 0;
switch (ctrl->id) {
case V4L2_CID_AUTO_WHITE_BALANCE:
ret = ov5647_s_auto_white_balance(sd, ctrl->val);
break;
case V4L2_CID_AUTOGAIN:
ret = ov5647_s_autogain(sd, ctrl->val);
break;
case V4L2_CID_EXPOSURE_AUTO:
ret = ov5647_s_exposure_auto(sd, ctrl->val);
break;
case V4L2_CID_ANALOGUE_GAIN:
ret = ov5647_s_analogue_gain(sd, ctrl->val);
break;
case V4L2_CID_EXPOSURE:
ret = ov5647_s_exposure(sd, ctrl->val);
break;
case V4L2_CID_VBLANK:
ret = ov5647_write16(sd, OV5647_REG_VTS_HI,
sensor->mode->format.height + ctrl->val);
break;
case V4L2_CID_TEST_PATTERN:
ret = ov5647_write(sd, OV5647_REG_ISPCTRL3D,
ov5647_test_pattern_val[ctrl->val]);
break;
/* Read-only, but we adjust it based on mode. */
case V4L2_CID_PIXEL_RATE:
case V4L2_CID_HBLANK:
/* Read-only, but we adjust it based on mode. */
break;
default:
dev_info(&client->dev,
"Control (id:0x%x, val:0x%x) not supported\n",
ctrl->id, ctrl->val);
return -EINVAL;
}
pm_runtime_put(&client->dev);
return ret;
}
static const struct v4l2_ctrl_ops ov5647_ctrl_ops = {
.s_ctrl = ov5647_s_ctrl,
};
static int ov5647_init_controls(struct ov5647 *sensor)
{
struct i2c_client *client = v4l2_get_subdevdata(&sensor->sd);
int hblank, exposure_max, exposure_def;
v4l2_ctrl_handler_init(&sensor->ctrls, 9);
v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 0);
v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 0);
v4l2_ctrl_new_std_menu(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL,
0, V4L2_EXPOSURE_MANUAL);
exposure_max = sensor->mode->vts - 4;
exposure_def = min(exposure_max, OV5647_EXPOSURE_DEFAULT);
sensor->exposure = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_EXPOSURE,
OV5647_EXPOSURE_MIN,
exposure_max, OV5647_EXPOSURE_STEP,
exposure_def);
/* min: 16 = 1.0x; max (10 bits); default: 32 = 2.0x. */
v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_ANALOGUE_GAIN, 16, 1023, 1, 32);
/* By default, PIXEL_RATE is read only, but it does change per mode */
sensor->pixel_rate = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_PIXEL_RATE,
sensor->mode->pixel_rate,
sensor->mode->pixel_rate, 1,
sensor->mode->pixel_rate);
/* By default, HBLANK is read only, but it does change per mode. */
hblank = sensor->mode->hts - sensor->mode->format.width;
sensor->hblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_HBLANK, hblank, hblank, 1,
hblank);
sensor->vblank = v4l2_ctrl_new_std(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_VBLANK, OV5647_VBLANK_MIN,
OV5647_VTS_MAX -
sensor->mode->format.height, 1,
sensor->mode->vts -
sensor->mode->format.height);
v4l2_ctrl_new_std_menu_items(&sensor->ctrls, &ov5647_ctrl_ops,
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov5647_test_pattern_menu) - 1,
0, 0, ov5647_test_pattern_menu);
if (sensor->ctrls.error)
goto handler_free;
sensor->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
sensor->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
sensor->sd.ctrl_handler = &sensor->ctrls;
return 0;
handler_free:
dev_err(&client->dev, "%s Controls initialization failed (%d)\n",
__func__, sensor->ctrls.error);
v4l2_ctrl_handler_free(&sensor->ctrls);
return sensor->ctrls.error;
}
static int ov5647_parse_dt(struct ov5647 *sensor, struct device_node *np)
{
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_CSI2_DPHY,
};
struct device_node *ep;
int ret;
ep = of_graph_get_endpoint_by_regs(np, 0, -1);
if (!ep)
return -EINVAL;
ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
if (ret)
goto out;
sensor->clock_ncont = bus_cfg.bus.mipi_csi2.flags &
V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
out:
of_node_put(ep);
return ret;
}
static int ov5647_probe(struct i2c_client *client)
{
struct device_node *np = client->dev.of_node;
struct device *dev = &client->dev;
struct ov5647 *sensor;
struct v4l2_subdev *sd;
u32 xclk_freq;
int ret;
sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
if (!sensor)
return -ENOMEM;
if (IS_ENABLED(CONFIG_OF) && np) {
ret = ov5647_parse_dt(sensor, np);
if (ret) {
dev_err(dev, "DT parsing error: %d\n", ret);
return ret;
}
}
sensor->xclk = devm_clk_get(dev, NULL);
if (IS_ERR(sensor->xclk)) {
dev_err(dev, "could not get xclk");
return PTR_ERR(sensor->xclk);
}
xclk_freq = clk_get_rate(sensor->xclk);
if (xclk_freq != 25000000) {
dev_err(dev, "Unsupported clock frequency: %u\n", xclk_freq);
return -EINVAL;
}
/* Request the power down GPIO asserted. */
sensor->pwdn = devm_gpiod_get_optional(dev, "pwdn", GPIOD_OUT_HIGH);
if (IS_ERR(sensor->pwdn)) {
dev_err(dev, "Failed to get 'pwdn' gpio\n");
return -EINVAL;
}
mutex_init(&sensor->lock);
sensor->mode = OV5647_DEFAULT_MODE;
ret = ov5647_init_controls(sensor);
if (ret)
goto mutex_destroy;
sd = &sensor->sd;
v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
sd->internal_ops = &ov5647_subdev_internal_ops;
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
if (ret < 0)
goto ctrl_handler_free;
ret = ov5647_power_on(dev);
if (ret)
goto entity_cleanup;
ret = ov5647_detect(sd);
if (ret < 0)
goto power_off;
ret = v4l2_async_register_subdev(sd);
if (ret < 0)
goto power_off;
/* Enable runtime PM and turn off the device */
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_idle(dev);
dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
return 0;
power_off:
ov5647_power_off(dev);
entity_cleanup:
media_entity_cleanup(&sd->entity);
ctrl_handler_free:
v4l2_ctrl_handler_free(&sensor->ctrls);
mutex_destroy:
mutex_destroy(&sensor->lock);
return ret;
}
static void ov5647_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct ov5647 *sensor = to_sensor(sd);
v4l2_async_unregister_subdev(&sensor->sd);
media_entity_cleanup(&sensor->sd.entity);
v4l2_ctrl_handler_free(&sensor->ctrls);
v4l2_device_unregister_subdev(sd);
pm_runtime_disable(&client->dev);
mutex_destroy(&sensor->lock);
}
static const struct dev_pm_ops ov5647_pm_ops = {
SET_RUNTIME_PM_OPS(ov5647_power_off, ov5647_power_on, NULL)
};
static const struct i2c_device_id ov5647_id[] = {
{ "ov5647", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, ov5647_id);
#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id ov5647_of_match[] = {
{ .compatible = "ovti,ov5647" },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ov5647_of_match);
#endif
static struct i2c_driver ov5647_driver = {
.driver = {
.of_match_table = of_match_ptr(ov5647_of_match),
.name = "ov5647",
.pm = &ov5647_pm_ops,
},
.probe = ov5647_probe,
.remove = ov5647_remove,
.id_table = ov5647_id,
};
module_i2c_driver(ov5647_driver);
MODULE_AUTHOR("Ramiro Oliveira <roliveir@synopsys.com>");
MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
MODULE_LICENSE("GPL v2");
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