498 lines
12 KiB
C
498 lines
12 KiB
C
/*
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* Driver for IMX074 CMOS Image Sensor from Sony
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*
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* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*
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* Partially inspired by the IMX074 driver from the Android / MSM tree
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/v4l2-mediabus.h>
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#include <linux/slab.h>
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#include <linux/videodev2.h>
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#include <linux/module.h>
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#include <media/soc_camera.h>
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#include <media/v4l2-async.h>
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#include <media/v4l2-clk.h>
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#include <media/v4l2-subdev.h>
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/* IMX074 registers */
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#define MODE_SELECT 0x0100
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#define IMAGE_ORIENTATION 0x0101
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#define GROUPED_PARAMETER_HOLD 0x0104
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/* Integration Time */
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#define COARSE_INTEGRATION_TIME_HI 0x0202
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#define COARSE_INTEGRATION_TIME_LO 0x0203
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/* Gain */
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#define ANALOGUE_GAIN_CODE_GLOBAL_HI 0x0204
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#define ANALOGUE_GAIN_CODE_GLOBAL_LO 0x0205
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/* PLL registers */
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#define PRE_PLL_CLK_DIV 0x0305
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#define PLL_MULTIPLIER 0x0307
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#define PLSTATIM 0x302b
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#define VNDMY_ABLMGSHLMT 0x300a
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#define Y_OPBADDR_START_DI 0x3014
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/* mode setting */
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#define FRAME_LENGTH_LINES_HI 0x0340
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#define FRAME_LENGTH_LINES_LO 0x0341
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#define LINE_LENGTH_PCK_HI 0x0342
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#define LINE_LENGTH_PCK_LO 0x0343
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#define YADDR_START 0x0347
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#define YADDR_END 0x034b
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#define X_OUTPUT_SIZE_MSB 0x034c
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#define X_OUTPUT_SIZE_LSB 0x034d
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#define Y_OUTPUT_SIZE_MSB 0x034e
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#define Y_OUTPUT_SIZE_LSB 0x034f
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#define X_EVEN_INC 0x0381
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#define X_ODD_INC 0x0383
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#define Y_EVEN_INC 0x0385
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#define Y_ODD_INC 0x0387
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#define HMODEADD 0x3001
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#define VMODEADD 0x3016
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#define VAPPLINE_START 0x3069
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#define VAPPLINE_END 0x306b
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#define SHUTTER 0x3086
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#define HADDAVE 0x30e8
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#define LANESEL 0x3301
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/* IMX074 supported geometry */
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#define IMX074_WIDTH 1052
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#define IMX074_HEIGHT 780
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/* IMX074 has only one fixed colorspace per pixelcode */
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struct imx074_datafmt {
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u32 code;
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enum v4l2_colorspace colorspace;
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};
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struct imx074 {
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struct v4l2_subdev subdev;
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const struct imx074_datafmt *fmt;
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struct v4l2_clk *clk;
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};
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static const struct imx074_datafmt imx074_colour_fmts[] = {
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{MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
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};
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static struct imx074 *to_imx074(const struct i2c_client *client)
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{
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return container_of(i2c_get_clientdata(client), struct imx074, subdev);
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}
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/* Find a data format by a pixel code in an array */
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static const struct imx074_datafmt *imx074_find_datafmt(u32 code)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(imx074_colour_fmts); i++)
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if (imx074_colour_fmts[i].code == code)
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return imx074_colour_fmts + i;
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return NULL;
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}
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static int reg_write(struct i2c_client *client, const u16 addr, const u8 data)
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{
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struct i2c_adapter *adap = client->adapter;
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struct i2c_msg msg;
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unsigned char tx[3];
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int ret;
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msg.addr = client->addr;
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msg.buf = tx;
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msg.len = 3;
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msg.flags = 0;
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tx[0] = addr >> 8;
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tx[1] = addr & 0xff;
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tx[2] = data;
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ret = i2c_transfer(adap, &msg, 1);
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mdelay(2);
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return ret == 1 ? 0 : -EIO;
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}
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static int reg_read(struct i2c_client *client, const u16 addr)
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{
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u8 buf[2] = {addr >> 8, addr & 0xff};
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int ret;
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struct i2c_msg msgs[] = {
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{
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.addr = client->addr,
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.flags = 0,
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.len = 2,
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.buf = buf,
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}, {
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = 2,
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.buf = buf,
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},
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};
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ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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if (ret < 0) {
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dev_warn(&client->dev, "Reading register %x from %x failed\n",
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addr, client->addr);
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return ret;
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}
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return buf[0] & 0xff; /* no sign-extension */
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}
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static int imx074_set_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *format)
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{
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struct v4l2_mbus_framefmt *mf = &format->format;
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const struct imx074_datafmt *fmt = imx074_find_datafmt(mf->code);
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct imx074 *priv = to_imx074(client);
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if (format->pad)
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return -EINVAL;
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dev_dbg(sd->v4l2_dev->dev, "%s(%u)\n", __func__, mf->code);
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if (!fmt) {
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/* MIPI CSI could have changed the format, double-check */
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if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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mf->code = imx074_colour_fmts[0].code;
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mf->colorspace = imx074_colour_fmts[0].colorspace;
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}
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mf->width = IMX074_WIDTH;
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mf->height = IMX074_HEIGHT;
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mf->field = V4L2_FIELD_NONE;
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if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
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priv->fmt = fmt;
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else
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cfg->try_fmt = *mf;
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return 0;
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}
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static int imx074_get_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_format *format)
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{
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struct v4l2_mbus_framefmt *mf = &format->format;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct imx074 *priv = to_imx074(client);
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const struct imx074_datafmt *fmt = priv->fmt;
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if (format->pad)
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return -EINVAL;
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mf->code = fmt->code;
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mf->colorspace = fmt->colorspace;
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mf->width = IMX074_WIDTH;
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mf->height = IMX074_HEIGHT;
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mf->field = V4L2_FIELD_NONE;
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return 0;
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}
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static int imx074_get_selection(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_selection *sel)
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{
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if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
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return -EINVAL;
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sel->r.left = 0;
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sel->r.top = 0;
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sel->r.width = IMX074_WIDTH;
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sel->r.height = IMX074_HEIGHT;
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switch (sel->target) {
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case V4L2_SEL_TGT_CROP_BOUNDS:
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case V4L2_SEL_TGT_CROP_DEFAULT:
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case V4L2_SEL_TGT_CROP:
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return 0;
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default:
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return -EINVAL;
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}
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}
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static int imx074_enum_mbus_code(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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if (code->pad ||
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(unsigned int)code->index >= ARRAY_SIZE(imx074_colour_fmts))
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return -EINVAL;
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code->code = imx074_colour_fmts[code->index].code;
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return 0;
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}
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static int imx074_s_stream(struct v4l2_subdev *sd, int enable)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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/* MODE_SELECT: stream or standby */
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return reg_write(client, MODE_SELECT, !!enable);
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}
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static int imx074_s_power(struct v4l2_subdev *sd, int on)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
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struct imx074 *priv = to_imx074(client);
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return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
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}
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static int imx074_g_mbus_config(struct v4l2_subdev *sd,
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struct v4l2_mbus_config *cfg)
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{
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cfg->type = V4L2_MBUS_CSI2;
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cfg->flags = V4L2_MBUS_CSI2_2_LANE |
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V4L2_MBUS_CSI2_CHANNEL_0 |
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V4L2_MBUS_CSI2_CONTINUOUS_CLOCK;
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return 0;
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}
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static const struct v4l2_subdev_video_ops imx074_subdev_video_ops = {
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.s_stream = imx074_s_stream,
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.g_mbus_config = imx074_g_mbus_config,
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};
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static const struct v4l2_subdev_core_ops imx074_subdev_core_ops = {
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.s_power = imx074_s_power,
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};
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static const struct v4l2_subdev_pad_ops imx074_subdev_pad_ops = {
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.enum_mbus_code = imx074_enum_mbus_code,
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.get_selection = imx074_get_selection,
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.get_fmt = imx074_get_fmt,
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.set_fmt = imx074_set_fmt,
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};
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static const struct v4l2_subdev_ops imx074_subdev_ops = {
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.core = &imx074_subdev_core_ops,
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.video = &imx074_subdev_video_ops,
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.pad = &imx074_subdev_pad_ops,
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};
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static int imx074_video_probe(struct i2c_client *client)
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{
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struct v4l2_subdev *subdev = i2c_get_clientdata(client);
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int ret;
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u16 id;
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ret = imx074_s_power(subdev, 1);
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if (ret < 0)
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return ret;
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/* Read sensor Model ID */
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ret = reg_read(client, 0);
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if (ret < 0)
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goto done;
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id = ret << 8;
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ret = reg_read(client, 1);
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if (ret < 0)
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goto done;
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id |= ret;
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dev_info(&client->dev, "Chip ID 0x%04x detected\n", id);
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if (id != 0x74) {
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ret = -ENODEV;
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goto done;
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}
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/* PLL Setting EXTCLK=24MHz, 22.5times */
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reg_write(client, PLL_MULTIPLIER, 0x2D);
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reg_write(client, PRE_PLL_CLK_DIV, 0x02);
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reg_write(client, PLSTATIM, 0x4B);
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/* 2-lane mode */
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reg_write(client, 0x3024, 0x00);
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reg_write(client, IMAGE_ORIENTATION, 0x00);
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/* select RAW mode:
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* 0x08+0x08 = top 8 bits
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* 0x0a+0x08 = compressed 8-bits
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* 0x0a+0x0a = 10 bits
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*/
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reg_write(client, 0x0112, 0x08);
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reg_write(client, 0x0113, 0x08);
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/* Base setting for High frame mode */
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reg_write(client, VNDMY_ABLMGSHLMT, 0x80);
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reg_write(client, Y_OPBADDR_START_DI, 0x08);
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reg_write(client, 0x3015, 0x37);
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reg_write(client, 0x301C, 0x01);
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reg_write(client, 0x302C, 0x05);
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reg_write(client, 0x3031, 0x26);
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reg_write(client, 0x3041, 0x60);
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reg_write(client, 0x3051, 0x24);
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reg_write(client, 0x3053, 0x34);
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reg_write(client, 0x3057, 0xC0);
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reg_write(client, 0x305C, 0x09);
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reg_write(client, 0x305D, 0x07);
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reg_write(client, 0x3060, 0x30);
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reg_write(client, 0x3065, 0x00);
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reg_write(client, 0x30AA, 0x08);
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reg_write(client, 0x30AB, 0x1C);
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reg_write(client, 0x30B0, 0x32);
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reg_write(client, 0x30B2, 0x83);
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reg_write(client, 0x30D3, 0x04);
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reg_write(client, 0x3106, 0x78);
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reg_write(client, 0x310C, 0x82);
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reg_write(client, 0x3304, 0x05);
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reg_write(client, 0x3305, 0x04);
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reg_write(client, 0x3306, 0x11);
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reg_write(client, 0x3307, 0x02);
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reg_write(client, 0x3308, 0x0C);
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reg_write(client, 0x3309, 0x06);
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reg_write(client, 0x330A, 0x08);
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reg_write(client, 0x330B, 0x04);
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reg_write(client, 0x330C, 0x08);
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reg_write(client, 0x330D, 0x06);
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reg_write(client, 0x330E, 0x01);
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reg_write(client, 0x3381, 0x00);
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/* V : 1/2V-addition (1,3), H : 1/2H-averaging (1,3) -> Full HD */
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/* 1608 = 1560 + 48 (black lines) */
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reg_write(client, FRAME_LENGTH_LINES_HI, 0x06);
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reg_write(client, FRAME_LENGTH_LINES_LO, 0x48);
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reg_write(client, YADDR_START, 0x00);
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reg_write(client, YADDR_END, 0x2F);
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/* 0x838 == 2104 */
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reg_write(client, X_OUTPUT_SIZE_MSB, 0x08);
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reg_write(client, X_OUTPUT_SIZE_LSB, 0x38);
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/* 0x618 == 1560 */
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reg_write(client, Y_OUTPUT_SIZE_MSB, 0x06);
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reg_write(client, Y_OUTPUT_SIZE_LSB, 0x18);
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reg_write(client, X_EVEN_INC, 0x01);
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reg_write(client, X_ODD_INC, 0x03);
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reg_write(client, Y_EVEN_INC, 0x01);
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reg_write(client, Y_ODD_INC, 0x03);
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reg_write(client, HMODEADD, 0x00);
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reg_write(client, VMODEADD, 0x16);
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reg_write(client, VAPPLINE_START, 0x24);
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reg_write(client, VAPPLINE_END, 0x53);
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reg_write(client, SHUTTER, 0x00);
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reg_write(client, HADDAVE, 0x80);
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reg_write(client, LANESEL, 0x00);
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reg_write(client, GROUPED_PARAMETER_HOLD, 0x00); /* off */
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ret = 0;
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done:
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imx074_s_power(subdev, 0);
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return ret;
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}
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static int imx074_probe(struct i2c_client *client,
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const struct i2c_device_id *did)
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{
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struct imx074 *priv;
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struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
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struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
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int ret;
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if (!ssdd) {
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dev_err(&client->dev, "IMX074: missing platform data!\n");
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return -EINVAL;
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}
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
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dev_warn(&adapter->dev,
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"I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
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return -EIO;
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}
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priv = devm_kzalloc(&client->dev, sizeof(struct imx074), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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v4l2_i2c_subdev_init(&priv->subdev, client, &imx074_subdev_ops);
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priv->fmt = &imx074_colour_fmts[0];
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priv->clk = v4l2_clk_get(&client->dev, "mclk");
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if (IS_ERR(priv->clk)) {
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dev_info(&client->dev, "Error %ld getting clock\n", PTR_ERR(priv->clk));
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return -EPROBE_DEFER;
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}
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ret = soc_camera_power_init(&client->dev, ssdd);
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if (ret < 0)
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goto epwrinit;
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ret = imx074_video_probe(client);
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if (ret < 0)
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goto eprobe;
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ret = v4l2_async_register_subdev(&priv->subdev);
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if (!ret)
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return 0;
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epwrinit:
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eprobe:
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v4l2_clk_put(priv->clk);
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return ret;
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}
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static int imx074_remove(struct i2c_client *client)
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{
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struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
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struct imx074 *priv = to_imx074(client);
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v4l2_async_unregister_subdev(&priv->subdev);
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v4l2_clk_put(priv->clk);
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if (ssdd->free_bus)
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ssdd->free_bus(ssdd);
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return 0;
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}
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static const struct i2c_device_id imx074_id[] = {
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{ "imx074", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, imx074_id);
|
|
|
|
static struct i2c_driver imx074_i2c_driver = {
|
|
.driver = {
|
|
.name = "imx074",
|
|
},
|
|
.probe = imx074_probe,
|
|
.remove = imx074_remove,
|
|
.id_table = imx074_id,
|
|
};
|
|
|
|
module_i2c_driver(imx074_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("Sony IMX074 Camera driver");
|
|
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
|
|
MODULE_LICENSE("GPL v2");
|