Hi Jacopo,
I wonder if it'd make sense to just make all the changes to the driver and
then have it reviewed; I'm not sure the old driver can be said to have been
in a known-good state that'd be useful to compare against. I think you did
that with another driver as well.
On Mon, Mar 12, 2018 at 02:43:02PM +0100, Jacopo Mondi wrote:
> Copy the soc_camera based driver in v4l2 sensor driver directory.
> This commit just copies the original file without modifying it.
> No modification to KConfig and Makefile as soc_camera framework
> dependencies need to be removed first in next commit.
>
> Signed-off-by: Jacopo Mondi <jacopo+rene...@jmondi.org>
> ---
> drivers/media/i2c/mt9t112.c | 1163
> +++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 1163 insertions(+)
> create mode 100644 drivers/media/i2c/mt9t112.c
>
> diff --git a/drivers/media/i2c/mt9t112.c b/drivers/media/i2c/mt9t112.c
> new file mode 100644
> index 0000000..297d22e
> --- /dev/null
> +++ b/drivers/media/i2c/mt9t112.c
> @@ -0,0 +1,1163 @@
> +/*
> + * mt9t112 Camera Driver
> + *
> + * Copyright (C) 2009 Renesas Solutions Corp.
> + * Kuninori Morimoto <morimoto.kunin...@renesas.com>
> + *
> + * Based on ov772x driver, mt9m111 driver,
> + *
> + * Copyright (C) 2008 Kuninori Morimoto <morimoto.kunin...@renesas.com>
> + * Copyright (C) 2008, Robert Jarzmik <robert.jarz...@free.fr>
> + * Copyright 2006-7 Jonathan Corbet <cor...@lwn.net>
> + * Copyright (C) 2008 Magnus Damm
> + * Copyright (C) 2008, Guennadi Liakhovetski <ker...@pengutronix.de>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/i2c.h>
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/v4l2-mediabus.h>
> +#include <linux/videodev2.h>
> +
> +#include <media/i2c/mt9t112.h>
> +#include <media/soc_camera.h>
> +#include <media/v4l2-clk.h>
> +#include <media/v4l2-common.h>
> +#include <media/v4l2-image-sizes.h>
> +
> +/* you can check PLL/clock info */
> +/* #define EXT_CLOCK 24000000 */
> +
> +/************************************************************************
> + macro
> +************************************************************************/
> +/*
> + * frame size
> + */
> +#define MAX_WIDTH 2048
> +#define MAX_HEIGHT 1536
> +
> +/*
> + * macro of read/write
> + */
> +#define ECHECKER(ret, x) \
> + do { \
> + (ret) = (x); \
> + if ((ret) < 0) \
> + return (ret); \
I think the code would be easier to follow without macros like this one.
> + } while (0)
> +
> +#define mt9t112_reg_write(ret, client, a, b) \
> + ECHECKER(ret, __mt9t112_reg_write(client, a, b))
> +#define mt9t112_mcu_write(ret, client, a, b) \
> + ECHECKER(ret, __mt9t112_mcu_write(client, a, b))
> +
> +#define mt9t112_reg_mask_set(ret, client, a, b, c) \
> + ECHECKER(ret, __mt9t112_reg_mask_set(client, a, b, c))
> +#define mt9t112_mcu_mask_set(ret, client, a, b, c) \
> + ECHECKER(ret, __mt9t112_mcu_mask_set(client, a, b, c))
> +
> +#define mt9t112_reg_read(ret, client, a) \
> + ECHECKER(ret, __mt9t112_reg_read(client, a))
> +
> +/*
> + * Logical address
> + */
> +#define _VAR(id, offset, base) (base | (id & 0x1f) << 10 | (offset &
> 0x3ff))
> +#define VAR(id, offset) _VAR(id, offset, 0x0000)
> +#define VAR8(id, offset) _VAR(id, offset, 0x8000)
> +
> +/************************************************************************
> + struct
> +************************************************************************/
> +struct mt9t112_format {
> + u32 code;
> + enum v4l2_colorspace colorspace;
> + u16 fmt;
> + u16 order;
> +};
> +
> +struct mt9t112_priv {
> + struct v4l2_subdev subdev;
> + struct mt9t112_camera_info *info;
> + struct i2c_client *client;
> + struct v4l2_rect frame;
> + struct v4l2_clk *clk;
> + const struct mt9t112_format *format;
> + int num_formats;
> + u32 flags;
> +/* for flags */
> +#define INIT_DONE (1 << 0)
> +#define PCLK_RISING (1 << 1)
> +};
> +
> +/************************************************************************
> + supported format
> +************************************************************************/
> +
> +static const struct mt9t112_format mt9t112_cfmts[] = {
> + {
> + .code = MEDIA_BUS_FMT_UYVY8_2X8,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .fmt = 1,
> + .order = 0,
> + }, {
> + .code = MEDIA_BUS_FMT_VYUY8_2X8,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .fmt = 1,
> + .order = 1,
> + }, {
> + .code = MEDIA_BUS_FMT_YUYV8_2X8,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .fmt = 1,
> + .order = 2,
> + }, {
> + .code = MEDIA_BUS_FMT_YVYU8_2X8,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .fmt = 1,
> + .order = 3,
> + }, {
> + .code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .fmt = 8,
> + .order = 2,
> + }, {
> + .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
> + .colorspace = V4L2_COLORSPACE_SRGB,
> + .fmt = 4,
> + .order = 2,
> + },
> +};
> +
> +/************************************************************************
> + general function
> +************************************************************************/
> +static struct mt9t112_priv *to_mt9t112(const struct i2c_client *client)
> +{
> + return container_of(i2c_get_clientdata(client),
> + struct mt9t112_priv,
> + subdev);
> +}
> +
> +static int __mt9t112_reg_read(const struct i2c_client *client, u16 command)
> +{
> + struct i2c_msg msg[2];
> + u8 buf[2];
> + int ret;
> +
> + command = swab16(command);
> +
> + msg[0].addr = client->addr;
> + msg[0].flags = 0;
> + msg[0].len = 2;
> + msg[0].buf = (u8 *)&command;
> +
> + msg[1].addr = client->addr;
> + msg[1].flags = I2C_M_RD;
> + msg[1].len = 2;
> + msg[1].buf = buf;
> +
> + /*
> + * if return value of this function is < 0,
> + * it mean error.
> + * else, under 16bit is valid data.
> + */
> + ret = i2c_transfer(client->adapter, msg, 2);
> + if (ret < 0)
> + return ret;
> +
> + memcpy(&ret, buf, 2);
> + return swab16(ret);
> +}
> +
> +static int __mt9t112_reg_write(const struct i2c_client *client,
> + u16 command, u16 data)
> +{
> + struct i2c_msg msg;
> + u8 buf[4];
> + int ret;
> +
> + command = swab16(command);
> + data = swab16(data);
Ouch. This presumably works on little endian systems *only*. Same in the
above functions.
> +
> + memcpy(buf + 0, &command, 2);
> + memcpy(buf + 2, &data, 2);
Just use put_unaligned_be16(), that's all you need.
> +
> + msg.addr = client->addr;
> + msg.flags = 0;
> + msg.len = 4;
> + msg.buf = buf;
> +
> + /*
> + * i2c_transfer return message length,
> + * but this function should return 0 if correct case
> + */
> + ret = i2c_transfer(client->adapter, &msg, 1);
> + if (ret >= 0)
> + ret = 0;
> +
> + return ret;
> +}
> +
> +static int __mt9t112_reg_mask_set(const struct i2c_client *client,
> + u16 command,
> + u16 mask,
> + u16 set)
> +{
> + int val = __mt9t112_reg_read(client, command);
> + if (val < 0)
> + return val;
> +
> + val &= ~mask;
> + val |= set & mask;
> +
> + return __mt9t112_reg_write(client, command, val);
> +}
> +
> +/* mcu access */
> +static int __mt9t112_mcu_read(const struct i2c_client *client, u16 command)
> +{
> + int ret;
> +
> + ret = __mt9t112_reg_write(client, 0x098E, command);
> + if (ret < 0)
> + return ret;
> +
> + return __mt9t112_reg_read(client, 0x0990);
> +}
> +
> +static int __mt9t112_mcu_write(const struct i2c_client *client,
> + u16 command, u16 data)
> +{
> + int ret;
> +
> + ret = __mt9t112_reg_write(client, 0x098E, command);
> + if (ret < 0)
> + return ret;
> +
> + return __mt9t112_reg_write(client, 0x0990, data);
> +}
> +
> +static int __mt9t112_mcu_mask_set(const struct i2c_client *client,
> + u16 command,
> + u16 mask,
> + u16 set)
> +{
> + int val = __mt9t112_mcu_read(client, command);
> + if (val < 0)
> + return val;
> +
> + val &= ~mask;
> + val |= set & mask;
> +
> + return __mt9t112_mcu_write(client, command, val);
> +}
> +
> +static int mt9t112_reset(const struct i2c_client *client)
> +{
> + int ret;
> +
> + mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0001);
> + msleep(1);
> + mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0000);
> +
> + return ret;
> +}
> +
> +#ifndef EXT_CLOCK
> +#define CLOCK_INFO(a, b)
> +#else
> +#define CLOCK_INFO(a, b) mt9t112_clock_info(a, b)
> +static int mt9t112_clock_info(const struct i2c_client *client, u32 ext)
> +{
> + int m, n, p1, p2, p3, p4, p5, p6, p7;
> + u32 vco, clk;
> + char *enable;
> +
> + ext /= 1000; /* kbyte order */
> +
> + mt9t112_reg_read(n, client, 0x0012);
> + p1 = n & 0x000f;
> + n = n >> 4;
> + p2 = n & 0x000f;
> + n = n >> 4;
> + p3 = n & 0x000f;
> +
> + mt9t112_reg_read(n, client, 0x002a);
> + p4 = n & 0x000f;
> + n = n >> 4;
> + p5 = n & 0x000f;
> + n = n >> 4;
> + p6 = n & 0x000f;
> +
> + mt9t112_reg_read(n, client, 0x002c);
> + p7 = n & 0x000f;
> +
> + mt9t112_reg_read(n, client, 0x0010);
> + m = n & 0x00ff;
> + n = (n >> 8) & 0x003f;
> +
> + enable = ((6000 > ext) || (54000 < ext)) ? "X" : "";
> + dev_dbg(&client->dev, "EXTCLK : %10u K %s\n", ext, enable);
> +
> + vco = 2 * m * ext / (n+1);
> + enable = ((384000 > vco) || (768000 < vco)) ? "X" : "";
> + dev_dbg(&client->dev, "VCO : %10u K %s\n", vco, enable);
> +
> + clk = vco / (p1+1) / (p2+1);
> + enable = (96000 < clk) ? "X" : "";
> + dev_dbg(&client->dev, "PIXCLK : %10u K %s\n", clk, enable);
> +
> + clk = vco / (p3+1);
> + enable = (768000 < clk) ? "X" : "";
> + dev_dbg(&client->dev, "MIPICLK : %10u K %s\n", clk, enable);
> +
> + clk = vco / (p6+1);
> + enable = (96000 < clk) ? "X" : "";
> + dev_dbg(&client->dev, "MCU CLK : %10u K %s\n", clk, enable);
> +
> + clk = vco / (p5+1);
> + enable = (54000 < clk) ? "X" : "";
> + dev_dbg(&client->dev, "SOC CLK : %10u K %s\n", clk, enable);
> +
> + clk = vco / (p4+1);
> + enable = (70000 < clk) ? "X" : "";
> + dev_dbg(&client->dev, "Sensor CLK : %10u K %s\n", clk, enable);
> +
> + clk = vco / (p7+1);
> + dev_dbg(&client->dev, "External sensor : %10u K\n", clk);
> +
> + clk = ext / (n+1);
> + enable = ((2000 > clk) || (24000 < clk)) ? "X" : "";
> + dev_dbg(&client->dev, "PFD : %10u K %s\n", clk, enable);
> +
> + return 0;
> +}
> +#endif
> +
> +static void mt9t112_frame_check(u32 *width, u32 *height, u32 *left, u32 *top)
> +{
> + soc_camera_limit_side(left, width, 0, 0, MAX_WIDTH);
> + soc_camera_limit_side(top, height, 0, 0, MAX_HEIGHT);
> +}
> +
> +static int mt9t112_set_a_frame_size(const struct i2c_client *client,
> + u16 width,
> + u16 height)
> +{
> + int ret;
> + u16 wstart = (MAX_WIDTH - width) / 2;
> + u16 hstart = (MAX_HEIGHT - height) / 2;
> +
> + /* (Context A) Image Width/Height */
> + mt9t112_mcu_write(ret, client, VAR(26, 0), width);
> + mt9t112_mcu_write(ret, client, VAR(26, 2), height);
> +
> + /* (Context A) Output Width/Height */
> + mt9t112_mcu_write(ret, client, VAR(18, 43), 8 + width);
> + mt9t112_mcu_write(ret, client, VAR(18, 45), 8 + height);
> +
> + /* (Context A) Start Row/Column */
> + mt9t112_mcu_write(ret, client, VAR(18, 2), 4 + hstart);
> + mt9t112_mcu_write(ret, client, VAR(18, 4), 4 + wstart);
> +
> + /* (Context A) End Row/Column */
> + mt9t112_mcu_write(ret, client, VAR(18, 6), 11 + height + hstart);
> + mt9t112_mcu_write(ret, client, VAR(18, 8), 11 + width + wstart);
> +
> + mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
> +
> + return ret;
> +}
> +
> +static int mt9t112_set_pll_dividers(const struct i2c_client *client,
> + u8 m, u8 n,
> + u8 p1, u8 p2, u8 p3,
> + u8 p4, u8 p5, u8 p6,
> + u8 p7)
> +{
> + int ret;
> + u16 val;
> +
> + /* N/M */
> + val = (n << 8) |
> + (m << 0);
> + mt9t112_reg_mask_set(ret, client, 0x0010, 0x3fff, val);
> +
> + /* P1/P2/P3 */
> + val = ((p3 & 0x0F) << 8) |
> + ((p2 & 0x0F) << 4) |
> + ((p1 & 0x0F) << 0);
> + mt9t112_reg_mask_set(ret, client, 0x0012, 0x0fff, val);
> +
> + /* P4/P5/P6 */
> + val = (0x7 << 12) |
> + ((p6 & 0x0F) << 8) |
> + ((p5 & 0x0F) << 4) |
> + ((p4 & 0x0F) << 0);
> + mt9t112_reg_mask_set(ret, client, 0x002A, 0x7fff, val);
> +
> + /* P7 */
> + val = (0x1 << 12) |
> + ((p7 & 0x0F) << 0);
> + mt9t112_reg_mask_set(ret, client, 0x002C, 0x100f, val);
> +
> + return ret;
> +}
> +
> +static int mt9t112_init_pll(const struct i2c_client *client)
> +{
> + struct mt9t112_priv *priv = to_mt9t112(client);
> + int data, i, ret;
> +
> + mt9t112_reg_mask_set(ret, client, 0x0014, 0x003, 0x0001);
> +
> + /* PLL control: BYPASS PLL = 8517 */
> + mt9t112_reg_write(ret, client, 0x0014, 0x2145);
> +
> + /* Replace these registers when new timing parameters are generated */
> + mt9t112_set_pll_dividers(client,
> + priv->info->divider.m,
> + priv->info->divider.n,
> + priv->info->divider.p1,
> + priv->info->divider.p2,
> + priv->info->divider.p3,
> + priv->info->divider.p4,
> + priv->info->divider.p5,
> + priv->info->divider.p6,
> + priv->info->divider.p7);
> +
> + /*
> + * TEST_BYPASS on
> + * PLL_ENABLE on
> + * SEL_LOCK_DET on
> + * TEST_BYPASS off
> + */
> + mt9t112_reg_write(ret, client, 0x0014, 0x2525);
> + mt9t112_reg_write(ret, client, 0x0014, 0x2527);
> + mt9t112_reg_write(ret, client, 0x0014, 0x3427);
> + mt9t112_reg_write(ret, client, 0x0014, 0x3027);
> +
> + mdelay(10);
> +
> + /*
> + * PLL_BYPASS off
> + * Reference clock count
> + * I2C Master Clock Divider
> + */
> + mt9t112_reg_write(ret, client, 0x0014, 0x3046);
> + mt9t112_reg_write(ret, client, 0x0016, 0x0400); /* JPEG initialization
> workaround */
> + mt9t112_reg_write(ret, client, 0x0022, 0x0190);
> + mt9t112_reg_write(ret, client, 0x3B84, 0x0212);
> +
> + /* External sensor clock is PLL bypass */
> + mt9t112_reg_write(ret, client, 0x002E, 0x0500);
> +
> + mt9t112_reg_mask_set(ret, client, 0x0018, 0x0002, 0x0002);
> + mt9t112_reg_mask_set(ret, client, 0x3B82, 0x0004, 0x0004);
> +
> + /* MCU disabled */
> + mt9t112_reg_mask_set(ret, client, 0x0018, 0x0004, 0x0004);
> +
> + /* out of standby */
> + mt9t112_reg_mask_set(ret, client, 0x0018, 0x0001, 0);
> +
> + mdelay(50);
> +
> + /*
> + * Standby Workaround
> + * Disable Secondary I2C Pads
> + */
> + mt9t112_reg_write(ret, client, 0x0614, 0x0001);
> + mdelay(1);
> + mt9t112_reg_write(ret, client, 0x0614, 0x0001);
> + mdelay(1);
> + mt9t112_reg_write(ret, client, 0x0614, 0x0001);
> + mdelay(1);
> + mt9t112_reg_write(ret, client, 0x0614, 0x0001);
> + mdelay(1);
> + mt9t112_reg_write(ret, client, 0x0614, 0x0001);
> + mdelay(1);
> + mt9t112_reg_write(ret, client, 0x0614, 0x0001);
> + mdelay(1);
> +
> + /* poll to verify out of standby. Must Poll this bit */
> + for (i = 0; i < 100; i++) {
> + mt9t112_reg_read(data, client, 0x0018);
> + if (!(0x4000 & data))
> + break;
> +
> + mdelay(10);
> + }
> +
> + return ret;
> +}
> +
> +static int mt9t112_init_setting(const struct i2c_client *client)
> +{
> +
> + int ret;
> +
> + /* Adaptive Output Clock (A) */
> + mt9t112_mcu_mask_set(ret, client, VAR(26, 160), 0x0040, 0x0000);
> +
> + /* Read Mode (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 12), 0x0024);
> +
> + /* Fine Correction (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 15), 0x00CC);
> +
> + /* Fine IT Min (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 17), 0x01f1);
> +
> + /* Fine IT Max Margin (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 19), 0x00fF);
> +
> + /* Base Frame Lines (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 29), 0x032D);
> +
> + /* Min Line Length (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 31), 0x073a);
> +
> + /* Line Length (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 37), 0x07d0);
> +
> + /* Adaptive Output Clock (B) */
> + mt9t112_mcu_mask_set(ret, client, VAR(27, 160), 0x0040, 0x0000);
> +
> + /* Row Start (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 74), 0x004);
> +
> + /* Column Start (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 76), 0x004);
> +
> + /* Row End (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 78), 0x60B);
> +
> + /* Column End (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 80), 0x80B);
> +
> + /* Fine Correction (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 87), 0x008C);
> +
> + /* Fine IT Min (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 89), 0x01F1);
> +
> + /* Fine IT Max Margin (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 91), 0x00FF);
> +
> + /* Base Frame Lines (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 101), 0x0668);
> +
> + /* Min Line Length (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 103), 0x0AF0);
> +
> + /* Line Length (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 109), 0x0AF0);
> +
> + /*
> + * Flicker Dectection registers
> + * This section should be replaced whenever new Timing file is generated
> + * All the following registers need to be replaced
> + * Following registers are generated from Register Wizard but user can
> + * modify them. For detail see auto flicker detection tuning
> + */
> +
> + /* FD_FDPERIOD_SELECT */
> + mt9t112_mcu_write(ret, client, VAR8(8, 5), 0x01);
> +
> + /* PRI_B_CONFIG_FD_ALGO_RUN */
> + mt9t112_mcu_write(ret, client, VAR(27, 17), 0x0003);
> +
> + /* PRI_A_CONFIG_FD_ALGO_RUN */
> + mt9t112_mcu_write(ret, client, VAR(26, 17), 0x0003);
> +
> + /*
> + * AFD range detection tuning registers
> + */
> +
> + /* search_f1_50 */
> + mt9t112_mcu_write(ret, client, VAR8(18, 165), 0x25);
> +
> + /* search_f2_50 */
> + mt9t112_mcu_write(ret, client, VAR8(18, 166), 0x28);
> +
> + /* search_f1_60 */
> + mt9t112_mcu_write(ret, client, VAR8(18, 167), 0x2C);
> +
> + /* search_f2_60 */
> + mt9t112_mcu_write(ret, client, VAR8(18, 168), 0x2F);
> +
> + /* period_50Hz (A) */
> + mt9t112_mcu_write(ret, client, VAR8(18, 68), 0xBA);
> +
> + /* secret register by aptina */
> + /* period_50Hz (A MSB) */
> + mt9t112_mcu_write(ret, client, VAR8(18, 303), 0x00);
> +
> + /* period_60Hz (A) */
> + mt9t112_mcu_write(ret, client, VAR8(18, 69), 0x9B);
> +
> + /* secret register by aptina */
> + /* period_60Hz (A MSB) */
> + mt9t112_mcu_write(ret, client, VAR8(18, 301), 0x00);
> +
> + /* period_50Hz (B) */
> + mt9t112_mcu_write(ret, client, VAR8(18, 140), 0x82);
> +
> + /* secret register by aptina */
> + /* period_50Hz (B) MSB */
> + mt9t112_mcu_write(ret, client, VAR8(18, 304), 0x00);
> +
> + /* period_60Hz (B) */
> + mt9t112_mcu_write(ret, client, VAR8(18, 141), 0x6D);
> +
> + /* secret register by aptina */
> + /* period_60Hz (B) MSB */
> + mt9t112_mcu_write(ret, client, VAR8(18, 302), 0x00);
> +
> + /* FD Mode */
> + mt9t112_mcu_write(ret, client, VAR8(8, 2), 0x10);
> +
> + /* Stat_min */
> + mt9t112_mcu_write(ret, client, VAR8(8, 9), 0x02);
> +
> + /* Stat_max */
> + mt9t112_mcu_write(ret, client, VAR8(8, 10), 0x03);
> +
> + /* Min_amplitude */
> + mt9t112_mcu_write(ret, client, VAR8(8, 12), 0x0A);
> +
> + /* RX FIFO Watermark (A) */
> + mt9t112_mcu_write(ret, client, VAR(18, 70), 0x0014);
> +
> + /* RX FIFO Watermark (B) */
> + mt9t112_mcu_write(ret, client, VAR(18, 142), 0x0014);
> +
> + /* MCLK: 16MHz
> + * PCLK: 73MHz
> + * CorePixCLK: 36.5 MHz
> + */
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x0044), 133);
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x0045), 110);
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x008c), 130);
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x008d), 108);
> +
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x00A5), 27);
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x00a6), 30);
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x00a7), 32);
> + mt9t112_mcu_write(ret, client, VAR8(18, 0x00a8), 35);
> +
> + return ret;
> +}
> +
> +static int mt9t112_auto_focus_setting(const struct i2c_client *client)
> +{
> + int ret;
> +
> + mt9t112_mcu_write(ret, client, VAR(12, 13), 0x000F);
> + mt9t112_mcu_write(ret, client, VAR(12, 23), 0x0F0F);
> + mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
> +
> + mt9t112_reg_write(ret, client, 0x0614, 0x0000);
> +
> + mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x05);
> + mt9t112_mcu_write(ret, client, VAR8(12, 2), 0x02);
> + mt9t112_mcu_write(ret, client, VAR(12, 3), 0x0002);
> + mt9t112_mcu_write(ret, client, VAR(17, 3), 0x8001);
> + mt9t112_mcu_write(ret, client, VAR(17, 11), 0x0025);
> + mt9t112_mcu_write(ret, client, VAR(17, 13), 0x0193);
> + mt9t112_mcu_write(ret, client, VAR8(17, 33), 0x18);
> + mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x05);
> +
> + return ret;
> +}
> +
> +static int mt9t112_auto_focus_trigger(const struct i2c_client *client)
> +{
> + int ret;
> +
> + mt9t112_mcu_write(ret, client, VAR8(12, 25), 0x01);
> +
> + return ret;
> +}
> +
> +static int mt9t112_init_camera(const struct i2c_client *client)
> +{
> + int ret;
> +
> + ECHECKER(ret, mt9t112_reset(client));
> +
> + ECHECKER(ret, mt9t112_init_pll(client));
> +
> + ECHECKER(ret, mt9t112_init_setting(client));
> +
> + ECHECKER(ret, mt9t112_auto_focus_setting(client));
> +
> + mt9t112_reg_mask_set(ret, client, 0x0018, 0x0004, 0);
> +
> + /* Analog setting B */
> + mt9t112_reg_write(ret, client, 0x3084, 0x2409);
> + mt9t112_reg_write(ret, client, 0x3092, 0x0A49);
> + mt9t112_reg_write(ret, client, 0x3094, 0x4949);
> + mt9t112_reg_write(ret, client, 0x3096, 0x4950);
> +
> + /*
> + * Disable adaptive clock
> + * PRI_A_CONFIG_JPEG_OB_TX_CONTROL_VAR
> + * PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR
> + */
> + mt9t112_mcu_write(ret, client, VAR(26, 160), 0x0A2E);
> + mt9t112_mcu_write(ret, client, VAR(27, 160), 0x0A2E);
> +
> + /* Configure STatus in Status_before_length Format and enable header */
> + /* PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR */
> + mt9t112_mcu_write(ret, client, VAR(27, 144), 0x0CB4);
> +
> + /* Enable JPEG in context B */
> + /* PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR */
> + mt9t112_mcu_write(ret, client, VAR8(27, 142), 0x01);
> +
> + /* Disable Dac_TXLO */
> + mt9t112_reg_write(ret, client, 0x316C, 0x350F);
> +
> + /* Set max slew rates */
> + mt9t112_reg_write(ret, client, 0x1E, 0x777);
> +
> + return ret;
> +}
> +
> +/************************************************************************
> + v4l2_subdev_core_ops
> +************************************************************************/
> +
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> +static int mt9t112_g_register(struct v4l2_subdev *sd,
> + struct v4l2_dbg_register *reg)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + int ret;
> +
> + reg->size = 2;
> + mt9t112_reg_read(ret, client, reg->reg);
> +
> + reg->val = (__u64)ret;
> +
> + return 0;
> +}
> +
> +static int mt9t112_s_register(struct v4l2_subdev *sd,
> + const struct v4l2_dbg_register *reg)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + int ret;
> +
> + mt9t112_reg_write(ret, client, reg->reg, reg->val);
> +
> + return ret;
> +}
> +#endif
> +
> +static int mt9t112_s_power(struct v4l2_subdev *sd, int on)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> +
> + return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
> +}
> +
> +static const struct v4l2_subdev_core_ops mt9t112_subdev_core_ops = {
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + .g_register = mt9t112_g_register,
> + .s_register = mt9t112_s_register,
> +#endif
> + .s_power = mt9t112_s_power,
> +};
> +
> +
> +/************************************************************************
> + v4l2_subdev_video_ops
> +************************************************************************/
> +static int mt9t112_s_stream(struct v4l2_subdev *sd, int enable)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> + int ret = 0;
> +
> + if (!enable) {
> + /* FIXME
> + *
> + * If user selected large output size,
> + * and used it long time,
> + * mt9t112 camera will be very warm.
> + *
> + * But current driver can not stop mt9t112 camera.
> + * So, set small size here to solve this problem.
> + */
> + mt9t112_set_a_frame_size(client, VGA_WIDTH, VGA_HEIGHT);
> + return ret;
> + }
> +
> + if (!(priv->flags & INIT_DONE)) {
> + u16 param = PCLK_RISING & priv->flags ? 0x0001 : 0x0000;
> +
> + ECHECKER(ret, mt9t112_init_camera(client));
Would it be possible to do this in power-on instead?
> +
> + /* Invert PCLK (Data sampled on falling edge of pixclk) */
> + mt9t112_reg_write(ret, client, 0x3C20, param);
This one as well, it's known at that time.
> +
> + mdelay(5);
> +
> + priv->flags |= INIT_DONE;
> + }
> +
> + mt9t112_mcu_write(ret, client, VAR(26, 7), priv->format->fmt);
> + mt9t112_mcu_write(ret, client, VAR(26, 9), priv->format->order);
> + mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
> +
> + mt9t112_set_a_frame_size(client,
> + priv->frame.width,
> + priv->frame.height);
> +
> + ECHECKER(ret, mt9t112_auto_focus_trigger(client));
> +
> + dev_dbg(&client->dev, "format : %d\n", priv->format->code);
> + dev_dbg(&client->dev, "size : %d x %d\n",
> + priv->frame.width,
> + priv->frame.height);
> +
> + CLOCK_INFO(client, EXT_CLOCK);
> +
> + return ret;
> +}
> +
> +static int mt9t112_set_params(struct mt9t112_priv *priv,
> + const struct v4l2_rect *rect,
> + u32 code)
> +{
> + int i;
> +
> + /*
> + * get color format
> + */
> + for (i = 0; i < priv->num_formats; i++)
> + if (mt9t112_cfmts[i].code == code)
> + break;
> +
> + if (i == priv->num_formats)
> + return -EINVAL;
> +
> + priv->frame = *rect;
> +
> + /*
> + * frame size check
> + */
> + mt9t112_frame_check(&priv->frame.width, &priv->frame.height,
> + &priv->frame.left, &priv->frame.top);
> +
> + priv->format = mt9t112_cfmts + i;
> +
> + return 0;
> +}
> +
> +static int mt9t112_get_selection(struct v4l2_subdev *sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_selection *sel)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> +
> + if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
> + return -EINVAL;
> +
> + switch (sel->target) {
> + case V4L2_SEL_TGT_CROP_BOUNDS:
> + sel->r.left = 0;
> + sel->r.top = 0;
> + sel->r.width = MAX_WIDTH;
> + sel->r.height = MAX_HEIGHT;
> + return 0;
> + case V4L2_SEL_TGT_CROP_DEFAULT:
> + sel->r.left = 0;
> + sel->r.top = 0;
> + sel->r.width = VGA_WIDTH;
> + sel->r.height = VGA_HEIGHT;
> + return 0;
> + case V4L2_SEL_TGT_CROP:
> + sel->r = priv->frame;
> + return 0;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> +static int mt9t112_set_selection(struct v4l2_subdev *sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_selection *sel)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> + const struct v4l2_rect *rect = &sel->r;
> +
> + if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
> + sel->target != V4L2_SEL_TGT_CROP)
> + return -EINVAL;
> +
> + return mt9t112_set_params(priv, rect, priv->format->code);
> +}
> +
> +static int mt9t112_get_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_format *format)
> +{
> + struct v4l2_mbus_framefmt *mf = &format->format;
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> +
> + if (format->pad)
> + return -EINVAL;
If there's just one pad, the check is redundant. (It's already present in
the subdev IOCTL handling.)
> +
> + mf->width = priv->frame.width;
> + mf->height = priv->frame.height;
> + mf->colorspace = priv->format->colorspace;
> + mf->code = priv->format->code;
> + mf->field = V4L2_FIELD_NONE;
> +
> + return 0;
> +}
> +
> +static int mt9t112_s_fmt(struct v4l2_subdev *sd,
> + struct v4l2_mbus_framefmt *mf)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> + struct v4l2_rect rect = {
> + .width = mf->width,
> + .height = mf->height,
> + .left = priv->frame.left,
> + .top = priv->frame.top,
> + };
> + int ret;
> +
> + ret = mt9t112_set_params(priv, &rect, mf->code);
> +
> + if (!ret)
> + mf->colorspace = priv->format->colorspace;
> +
> + return ret;
> +}
> +
> +static int mt9t112_set_fmt(struct v4l2_subdev *sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_format *format)
> +{
> + struct v4l2_mbus_framefmt *mf = &format->format;
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> + unsigned int top, left;
> + int i;
> +
> + if (format->pad)
> + return -EINVAL;
> +
> + for (i = 0; i < priv->num_formats; i++)
> + if (mt9t112_cfmts[i].code == mf->code)
> + break;
> +
> + if (i == priv->num_formats) {
> + mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
> + mf->colorspace = V4L2_COLORSPACE_JPEG;
> + } else {
> + mf->colorspace = mt9t112_cfmts[i].colorspace;
> + }
> +
> + mt9t112_frame_check(&mf->width, &mf->height, &left, &top);
> +
> + mf->field = V4L2_FIELD_NONE;
> +
> + if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
> + return mt9t112_s_fmt(sd, mf);
> + cfg->try_fmt = *mf;
> + return 0;
> +}
> +
> +static int mt9t112_enum_mbus_code(struct v4l2_subdev *sd,
> + struct v4l2_subdev_pad_config *cfg,
> + struct v4l2_subdev_mbus_code_enum *code)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> +
> + if (code->pad || code->index >= priv->num_formats)
> + return -EINVAL;
> +
> + code->code = mt9t112_cfmts[code->index].code;
> +
> + return 0;
> +}
> +
> +static int mt9t112_g_mbus_config(struct v4l2_subdev *sd,
> + struct v4l2_mbus_config *cfg)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
> +
> + cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
> + V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH |
> + V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING;
> + cfg->type = V4L2_MBUS_PARALLEL;
> + cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
> +
> + return 0;
> +}
> +
> +static int mt9t112_s_mbus_config(struct v4l2_subdev *sd,
> + const struct v4l2_mbus_config *cfg)
> +{
> + struct i2c_client *client = v4l2_get_subdevdata(sd);
> + struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
> + struct mt9t112_priv *priv = to_mt9t112(client);
> +
> + if (soc_camera_apply_board_flags(ssdd, cfg) &
> V4L2_MBUS_PCLK_SAMPLE_RISING)
> + priv->flags |= PCLK_RISING;
> +
> + return 0;
> +}
Do you have a DT based system where you use this? Then I think it'd be
rather easy to get rid of the mbus config stuff.
> +
> +static const struct v4l2_subdev_video_ops mt9t112_subdev_video_ops = {
> + .s_stream = mt9t112_s_stream,
> + .g_mbus_config = mt9t112_g_mbus_config,
> + .s_mbus_config = mt9t112_s_mbus_config,
> +};
> +
> +static const struct v4l2_subdev_pad_ops mt9t112_subdev_pad_ops = {
> + .enum_mbus_code = mt9t112_enum_mbus_code,
> + .get_selection = mt9t112_get_selection,
> + .set_selection = mt9t112_set_selection,
> + .get_fmt = mt9t112_get_fmt,
> + .set_fmt = mt9t112_set_fmt,
> +};
> +
> +/************************************************************************
> + i2c driver
> +************************************************************************/
> +static const struct v4l2_subdev_ops mt9t112_subdev_ops = {
> + .core = &mt9t112_subdev_core_ops,
> + .video = &mt9t112_subdev_video_ops,
> + .pad = &mt9t112_subdev_pad_ops,
> +};
> +
> +static int mt9t112_camera_probe(struct i2c_client *client)
> +{
> + struct mt9t112_priv *priv = to_mt9t112(client);
> + const char *devname;
> + int chipid;
> + int ret;
> +
> + ret = mt9t112_s_power(&priv->subdev, 1);
> + if (ret < 0)
> + return ret;
> +
> + /*
> + * check and show chip ID
> + */
> + mt9t112_reg_read(chipid, client, 0x0000);
> +
> + switch (chipid) {
> + case 0x2680:
> + devname = "mt9t111";
> + priv->num_formats = 1;
> + break;
> + case 0x2682:
> + devname = "mt9t112";
> + priv->num_formats = ARRAY_SIZE(mt9t112_cfmts);
> + break;
> + default:
> + dev_err(&client->dev, "Product ID error %04x\n", chipid);
> + ret = -ENODEV;
> + goto done;
> + }
> +
> + dev_info(&client->dev, "%s chip ID %04x\n", devname, chipid);
> +
> +done:
> + mt9t112_s_power(&priv->subdev, 0);
> + return ret;
> +}
> +
> +static int mt9t112_probe(struct i2c_client *client,
> + const struct i2c_device_id *did)
> +{
> + struct mt9t112_priv *priv;
> + struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
> + struct v4l2_rect rect = {
> + .width = VGA_WIDTH,
> + .height = VGA_HEIGHT,
> + .left = (MAX_WIDTH - VGA_WIDTH) / 2,
> + .top = (MAX_HEIGHT - VGA_HEIGHT) / 2,
> + };
> + int ret;
> +
> + if (!ssdd || !ssdd->drv_priv) {
> + dev_err(&client->dev, "mt9t112: missing platform data!\n");
> + return -EINVAL;
> + }
> +
> + priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->info = ssdd->drv_priv;
> +
> + v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
> +
> + priv->clk = v4l2_clk_get(&client->dev, "mclk");
> + if (IS_ERR(priv->clk))
> + return PTR_ERR(priv->clk);
> +
> + ret = mt9t112_camera_probe(client);
> +
> + /* Cannot fail: using the default supported pixel code */
> + if (!ret)
> + mt9t112_set_params(priv, &rect, MEDIA_BUS_FMT_UYVY8_2X8);
> + else
> + v4l2_clk_put(priv->clk);
> +
> + return ret;
> +}
> +
> +static int mt9t112_remove(struct i2c_client *client)
> +{
> + struct mt9t112_priv *priv = to_mt9t112(client);
> +
> + v4l2_clk_put(priv->clk);
> + return 0;
> +}
> +
> +static const struct i2c_device_id mt9t112_id[] = {
> + { "mt9t112", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, mt9t112_id);
> +
> +static struct i2c_driver mt9t112_i2c_driver = {
> + .driver = {
> + .name = "mt9t112",
> + },
> + .probe = mt9t112_probe,
If you need to support OF based systems only, you could use probe_new and
drop the i2c ID table.
> + .remove = mt9t112_remove,
> + .id_table = mt9t112_id,
> +};
> +
> +module_i2c_driver(mt9t112_i2c_driver);
> +
> +MODULE_DESCRIPTION("SoC Camera driver for mt9t112");
> +MODULE_AUTHOR("Kuninori Morimoto");
> +MODULE_LICENSE("GPL v2");
--
Kind regards,
Sakari Ailus
e-mail: sakari.ai...@iki.fi
