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authorMarek Vasut <marek.vasut@gmail.com>2009-09-23 04:59:24 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-12-05 18:40:01 -0200
commit8d64827172ae680d34d0611a1e865b546e6a5f08 (patch)
tree8192517a82ae195c9534986b678af76c7b91f2ba /drivers/media/video/ov9640.c
parent96fa2b508d2d3fe040cf4ef2fffb955f0a537ea1 (diff)
V4L/DVB (13040): V4L2: Add a v4l2-subdev (soc-camera) driver for OmniVision OV9640 sensor
Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/ov9640.c')
-rw-r--r--drivers/media/video/ov9640.c801
1 files changed, 801 insertions, 0 deletions
diff --git a/drivers/media/video/ov9640.c b/drivers/media/video/ov9640.c
new file mode 100644
index 00000000000..c81ae219288
--- /dev/null
+++ b/drivers/media/video/ov9640.c
@@ -0,0 +1,801 @@
+/*
+ * OmniVision OV96xx Camera Driver
+ *
+ * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * Based on ov772x camera driver:
+ *
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ * Kuninori Morimoto <morimoto.kuninori@renesas.com>
+ *
+ * Based on ov7670 and soc_camera_platform driver,
+ *
+ * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
+ * Copyright (C) 2008 Magnus Damm
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@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/init.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-common.h>
+#include <media/soc_camera.h>
+
+#include "ov9640.h"
+
+/* default register setup */
+static const struct ov9640_reg ov9640_regs_dflt[] = {
+ { OV9640_COM5, OV9640_COM5_SYSCLK | OV9640_COM5_LONGEXP },
+ { OV9640_COM6, OV9640_COM6_OPT_BLC | OV9640_COM6_ADBLC_BIAS |
+ OV9640_COM6_FMT_RST | OV9640_COM6_ADBLC_OPTEN },
+ { OV9640_PSHFT, OV9640_PSHFT_VAL(0x01) },
+ { OV9640_ACOM, OV9640_ACOM_2X_ANALOG | OV9640_ACOM_RSVD },
+ { OV9640_TSLB, OV9640_TSLB_YUYV_UYVY },
+ { OV9640_COM16, OV9640_COM16_RB_AVG },
+
+ /* Gamma curve P */
+ { 0x6c, 0x40 }, { 0x6d, 0x30 }, { 0x6e, 0x4b }, { 0x6f, 0x60 },
+ { 0x70, 0x70 }, { 0x71, 0x70 }, { 0x72, 0x70 }, { 0x73, 0x70 },
+ { 0x74, 0x60 }, { 0x75, 0x60 }, { 0x76, 0x50 }, { 0x77, 0x48 },
+ { 0x78, 0x3a }, { 0x79, 0x2e }, { 0x7a, 0x28 }, { 0x7b, 0x22 },
+
+ /* Gamma curve T */
+ { 0x7c, 0x04 }, { 0x7d, 0x07 }, { 0x7e, 0x10 }, { 0x7f, 0x28 },
+ { 0x80, 0x36 }, { 0x81, 0x44 }, { 0x82, 0x52 }, { 0x83, 0x60 },
+ { 0x84, 0x6c }, { 0x85, 0x78 }, { 0x86, 0x8c }, { 0x87, 0x9e },
+ { 0x88, 0xbb }, { 0x89, 0xd2 }, { 0x8a, 0xe6 },
+};
+
+/* Configurations
+ * NOTE: for YUV, alter the following registers:
+ * COM12 |= OV9640_COM12_YUV_AVG
+ *
+ * for RGB, alter the following registers:
+ * COM7 |= OV9640_COM7_RGB
+ * COM13 |= OV9640_COM13_RGB_AVG
+ * COM15 |= proper RGB color encoding mode
+ */
+static const struct ov9640_reg ov9640_regs_qqcif[] = {
+ { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x0f) },
+ { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
+ { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
+ { OV9640_COM7, OV9640_COM7_QCIF },
+ { OV9640_COM12, OV9640_COM12_RSVD },
+ { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
+ { OV9640_COM15, OV9640_COM15_OR_10F0 },
+};
+
+static const struct ov9640_reg ov9640_regs_qqvga[] = {
+ { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
+ { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
+ { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
+ { OV9640_COM7, OV9640_COM7_QVGA },
+ { OV9640_COM12, OV9640_COM12_RSVD },
+ { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
+ { OV9640_COM15, OV9640_COM15_OR_10F0 },
+};
+
+static const struct ov9640_reg ov9640_regs_qcif[] = {
+ { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
+ { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
+ { OV9640_COM7, OV9640_COM7_QCIF },
+ { OV9640_COM12, OV9640_COM12_RSVD },
+ { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
+ { OV9640_COM15, OV9640_COM15_OR_10F0 },
+};
+
+static const struct ov9640_reg ov9640_regs_qvga[] = {
+ { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
+ { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
+ { OV9640_COM7, OV9640_COM7_QVGA },
+ { OV9640_COM12, OV9640_COM12_RSVD },
+ { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
+ { OV9640_COM15, OV9640_COM15_OR_10F0 },
+};
+
+static const struct ov9640_reg ov9640_regs_cif[] = {
+ { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
+ { OV9640_COM3, OV9640_COM3_VP },
+ { OV9640_COM7, OV9640_COM7_CIF },
+ { OV9640_COM12, OV9640_COM12_RSVD },
+ { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
+ { OV9640_COM15, OV9640_COM15_OR_10F0 },
+};
+
+static const struct ov9640_reg ov9640_regs_vga[] = {
+ { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
+ { OV9640_COM3, OV9640_COM3_VP },
+ { OV9640_COM7, OV9640_COM7_VGA },
+ { OV9640_COM12, OV9640_COM12_RSVD },
+ { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
+ { OV9640_COM15, OV9640_COM15_OR_10F0 },
+};
+
+static const struct ov9640_reg ov9640_regs_sxga[] = {
+ { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
+ { OV9640_COM3, OV9640_COM3_VP },
+ { OV9640_COM7, 0 },
+ { OV9640_COM12, OV9640_COM12_RSVD },
+ { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
+ { OV9640_COM15, OV9640_COM15_OR_10F0 },
+};
+
+static const struct ov9640_reg ov9640_regs_yuv[] = {
+ { OV9640_MTX1, 0x58 },
+ { OV9640_MTX2, 0x48 },
+ { OV9640_MTX3, 0x10 },
+ { OV9640_MTX4, 0x28 },
+ { OV9640_MTX5, 0x48 },
+ { OV9640_MTX6, 0x70 },
+ { OV9640_MTX7, 0x40 },
+ { OV9640_MTX8, 0x40 },
+ { OV9640_MTX9, 0x40 },
+ { OV9640_MTXS, 0x0f },
+};
+
+static const struct ov9640_reg ov9640_regs_rgb[] = {
+ { OV9640_MTX1, 0x71 },
+ { OV9640_MTX2, 0x3e },
+ { OV9640_MTX3, 0x0c },
+ { OV9640_MTX4, 0x33 },
+ { OV9640_MTX5, 0x72 },
+ { OV9640_MTX6, 0x00 },
+ { OV9640_MTX7, 0x2b },
+ { OV9640_MTX8, 0x66 },
+ { OV9640_MTX9, 0xd2 },
+ { OV9640_MTXS, 0x65 },
+};
+
+/*
+ * TODO: this sensor also supports RGB555 and RGB565 formats, but support for
+ * them has not yet been sufficiently tested and so it is not included with
+ * this version of the driver. To test and debug these formats add two entries
+ * to the below array, see ov722x.c for an example.
+ */
+static const struct soc_camera_data_format ov9640_fmt_lists[] = {
+ {
+ .name = "UYVY",
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .depth = 16,
+ .colorspace = V4L2_COLORSPACE_JPEG,
+ },
+};
+
+static const struct v4l2_queryctrl ov9640_controls[] = {
+ {
+ .id = V4L2_CID_VFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Flip Vertically",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_HFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Flip Horizontally",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+};
+
+/* read a register */
+static int ov9640_reg_read(struct i2c_client *client, u8 reg, u8 *val)
+{
+ int ret;
+ u8 data = reg;
+ struct i2c_msg msg = {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = &data,
+ };
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ goto err;
+
+ msg.flags = I2C_M_RD;
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0)
+ goto err;
+
+ *val = data;
+ return 0;
+
+err:
+ dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
+ return ret;
+}
+
+/* write a register */
+static int ov9640_reg_write(struct i2c_client *client, u8 reg, u8 val)
+{
+ int ret;
+ u8 _val;
+ unsigned char data[2] = { reg, val };
+ struct i2c_msg msg = {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 2,
+ .buf = data,
+ };
+
+ ret = i2c_transfer(client->adapter, &msg, 1);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
+ return ret;
+ }
+
+ /* we have to read the register back ... no idea why, maybe HW bug */
+ ret = ov9640_reg_read(client, reg, &_val);
+ if (ret)
+ dev_err(&client->dev,
+ "Failed reading back register 0x%02x!\n", reg);
+
+ return 0;
+}
+
+
+/* Read a register, alter its bits, write it back */
+static int ov9640_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 unset)
+{
+ u8 val;
+ int ret;
+
+ ret = ov9640_reg_read(client, reg, &val);
+ if (ret) {
+ dev_err(&client->dev,
+ "[Read]-Modify-Write of register %02x failed!\n", reg);
+ return val;
+ }
+
+ val |= set;
+ val &= ~unset;
+
+ ret = ov9640_reg_write(client, reg, val);
+ if (ret)
+ dev_err(&client->dev,
+ "Read-Modify-[Write] of register %02x failed!\n", reg);
+
+ return ret;
+}
+
+/* Soft reset the camera. This has nothing to do with the RESET pin! */
+static int ov9640_reset(struct i2c_client *client)
+{
+ int ret;
+
+ ret = ov9640_reg_write(client, OV9640_COM7, OV9640_COM7_SCCB_RESET);
+ if (ret)
+ dev_err(&client->dev,
+ "An error occured while entering soft reset!\n");
+
+ return ret;
+}
+
+/* Start/Stop streaming from the device */
+static int ov9640_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ return 0;
+}
+
+/* Alter bus settings on camera side */
+static int ov9640_set_bus_param(struct soc_camera_device *icd,
+ unsigned long flags)
+{
+ return 0;
+}
+
+/* Request bus settings on camera side */
+static unsigned long ov9640_query_bus_param(struct soc_camera_device *icd)
+{
+ struct soc_camera_link *icl = to_soc_camera_link(icd);
+
+ /*
+ * REVISIT: the camera probably can do 10 bit transfers, but I don't
+ * have those pins connected on my hardware.
+ */
+ unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
+ SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
+ SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATAWIDTH_8;
+
+ return soc_camera_apply_sensor_flags(icl, flags);
+}
+
+/* Get status of additional camera capabilities */
+static int ov9640_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct i2c_client *client = sd->priv;
+ struct ov9640_priv *priv = container_of(i2c_get_clientdata(client),
+ struct ov9640_priv, subdev);
+
+ switch (ctrl->id) {
+ case V4L2_CID_VFLIP:
+ ctrl->value = priv->flag_vflip;
+ break;
+ case V4L2_CID_HFLIP:
+ ctrl->value = priv->flag_hflip;
+ break;
+ }
+ return 0;
+}
+
+/* Set status of additional camera capabilities */
+static int ov9640_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct i2c_client *client = sd->priv;
+ struct ov9640_priv *priv = container_of(i2c_get_clientdata(client),
+ struct ov9640_priv, subdev);
+
+ int ret = 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_VFLIP:
+ priv->flag_vflip = ctrl->value;
+ if (ctrl->value)
+ ret = ov9640_reg_rmw(client, OV9640_MVFP,
+ OV9640_MVFP_V, 0);
+ else
+ ret = ov9640_reg_rmw(client, OV9640_MVFP,
+ 0, OV9640_MVFP_V);
+ break;
+ case V4L2_CID_HFLIP:
+ priv->flag_hflip = ctrl->value;
+ if (ctrl->value)
+ ret = ov9640_reg_rmw(client, OV9640_MVFP,
+ OV9640_MVFP_H, 0);
+ else
+ ret = ov9640_reg_rmw(client, OV9640_MVFP,
+ 0, OV9640_MVFP_H);
+ break;
+ }
+
+ return ret;
+}
+
+/* Get chip identification */
+static int ov9640_g_chip_ident(struct v4l2_subdev *sd,
+ struct v4l2_dbg_chip_ident *id)
+{
+ struct i2c_client *client = sd->priv;
+ struct ov9640_priv *priv = container_of(i2c_get_clientdata(client),
+ struct ov9640_priv, subdev);
+
+ id->ident = priv->model;
+ id->revision = priv->revision;
+
+ return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int ov9640_get_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct i2c_client *client = sd->priv;
+ int ret;
+ u8 val;
+
+ if (reg->reg & ~0xff)
+ return -EINVAL;
+
+ reg->size = 1;
+
+ ret = ov9640_reg_read(client, reg->reg, &val);
+ if (ret)
+ return ret;
+
+ reg->val = (__u64)val;
+
+ return 0;
+}
+
+static int ov9640_set_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct i2c_client *client = sd->priv;
+
+ if (reg->reg & ~0xff || reg->val & ~0xff)
+ return -EINVAL;
+
+ return ov9640_reg_write(client, reg->reg, reg->val);
+}
+#endif
+
+/* select nearest higher resolution for capture */
+static void ov9640_res_roundup(u32 *width, u32 *height)
+{
+ int i;
+ enum { QQCIF, QQVGA, QCIF, QVGA, CIF, VGA, SXGA };
+ int res_x[] = { 88, 160, 176, 320, 352, 640, 1280 };
+ int res_y[] = { 72, 120, 144, 240, 288, 480, 960 };
+
+ for (i = 0; i < ARRAY_SIZE(res_x); i++) {
+ if (res_x[i] >= *width && res_y[i] >= *height) {
+ *width = res_x[i];
+ *height = res_y[i];
+ return;
+ }
+ }
+
+ *width = res_x[SXGA];
+ *height = res_y[SXGA];
+}
+
+/* Prepare necessary register changes depending on color encoding */
+static void ov9640_alter_regs(u32 pixfmt, struct ov9640_reg_alt *alt)
+{
+ switch (pixfmt) {
+ case V4L2_PIX_FMT_UYVY:
+ alt->com12 = OV9640_COM12_YUV_AVG;
+ alt->com13 = OV9640_COM13_Y_DELAY_EN |
+ OV9640_COM13_YUV_DLY(0x01);
+ break;
+ case V4L2_PIX_FMT_RGB555:
+ alt->com7 = OV9640_COM7_RGB;
+ alt->com13 = OV9640_COM13_RGB_AVG;
+ alt->com15 = OV9640_COM15_RGB_555;
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ alt->com7 = OV9640_COM7_RGB;
+ alt->com13 = OV9640_COM13_RGB_AVG;
+ alt->com15 = OV9640_COM15_RGB_565;
+ break;
+ };
+}
+
+/* Setup registers according to resolution and color encoding */
+static int ov9640_write_regs(struct i2c_client *client,
+ u32 width, u32 pixfmt, struct ov9640_reg_alt *alts)
+{
+ const struct ov9640_reg *ov9640_regs, *matrix_regs;
+ int ov9640_regs_len, matrix_regs_len;
+ int i, ret;
+ u8 val;
+
+ /* select register configuration for given resolution */
+ switch (width) {
+ case W_QQCIF:
+ ov9640_regs = ov9640_regs_qqcif;
+ ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqcif);
+ break;
+ case W_QQVGA:
+ ov9640_regs = ov9640_regs_qqvga;
+ ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqvga);
+ break;
+ case W_QCIF:
+ ov9640_regs = ov9640_regs_qcif;
+ ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qcif);
+ break;
+ case W_QVGA:
+ ov9640_regs = ov9640_regs_qvga;
+ ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qvga);
+ break;
+ case W_CIF:
+ ov9640_regs = ov9640_regs_cif;
+ ov9640_regs_len = ARRAY_SIZE(ov9640_regs_cif);
+ break;
+ case W_VGA:
+ ov9640_regs = ov9640_regs_vga;
+ ov9640_regs_len = ARRAY_SIZE(ov9640_regs_vga);
+ break;
+ case W_SXGA:
+ ov9640_regs = ov9640_regs_sxga;
+ ov9640_regs_len = ARRAY_SIZE(ov9640_regs_sxga);
+ break;
+ default:
+ dev_err(&client->dev, "Failed to select resolution!\n");
+ return -EINVAL;
+ }
+
+ /* select color matrix configuration for given color encoding */
+ if (pixfmt == V4L2_PIX_FMT_UYVY) {
+ matrix_regs = ov9640_regs_yuv;
+ matrix_regs_len = ARRAY_SIZE(ov9640_regs_yuv);
+ } else {
+ matrix_regs = ov9640_regs_rgb;
+ matrix_regs_len = ARRAY_SIZE(ov9640_regs_rgb);
+ }
+
+ /* write register settings into the module */
+ for (i = 0; i < ov9640_regs_len; i++) {
+ val = ov9640_regs[i].val;
+
+ switch (ov9640_regs[i].reg) {
+ case OV9640_COM7:
+ val |= alts->com7;
+ break;
+ case OV9640_COM12:
+ val |= alts->com12;
+ break;
+ case OV9640_COM13:
+ val |= alts->com13;
+ break;
+ case OV9640_COM15:
+ val |= alts->com15;
+ break;
+ }
+
+ ret = ov9640_reg_write(client, ov9640_regs[i].reg, val);
+ if (ret)
+ return ret;
+ }
+
+ /* write color matrix configuration into the module */
+ for (i = 0; i < matrix_regs_len; i++) {
+ ret = ov9640_reg_write(client, matrix_regs[i].reg,
+ matrix_regs[i].val);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/* program default register values */
+static int ov9640_prog_dflt(struct i2c_client *client)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(ov9640_regs_dflt); i++) {
+ ret = ov9640_reg_write(client, ov9640_regs_dflt[i].reg,
+ ov9640_regs_dflt[i].val);
+ if (ret)
+ return ret;
+ }
+
+ /* wait for the changes to actually happen, 140ms are not enough yet */
+ mdelay(150);
+
+ return 0;
+}
+
+/* set the format we will capture in */
+static int ov9640_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+{
+ struct i2c_client *client = sd->priv;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct ov9640_reg_alt alts = {0};
+ int ret;
+
+ ov9640_res_roundup(&pix->width, &pix->height);
+ ov9640_alter_regs(pix->pixelformat, &alts);
+
+ ov9640_reset(client);
+
+ ret = ov9640_prog_dflt(client);
+ if (ret)
+ return ret;
+
+ return ov9640_write_regs(client, pix->width, pix->pixelformat, &alts);
+}
+
+static int ov9640_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+{
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+
+ ov9640_res_roundup(&pix->width, &pix->height);
+ pix->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int ov9640_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
+{
+ a->c.left = 0;
+ a->c.top = 0;
+ a->c.width = W_SXGA;
+ a->c.height = H_SXGA;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ return 0;
+}
+
+static int ov9640_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
+{
+ a->bounds.left = 0;
+ a->bounds.top = 0;
+ a->bounds.width = W_SXGA;
+ a->bounds.height = H_SXGA;
+ a->defrect = a->bounds;
+ a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ a->pixelaspect.numerator = 1;
+ a->pixelaspect.denominator = 1;
+
+ return 0;
+}
+
+
+
+static int ov9640_video_probe(struct soc_camera_device *icd,
+ struct i2c_client *client)
+{
+ struct ov9640_priv *priv = i2c_get_clientdata(client);
+ u8 pid, ver, midh, midl;
+ const char *devname;
+ int ret = 0;
+
+ /*
+ * We must have a parent by now. And it cannot be a wrong one.
+ * So this entire test is completely redundant.
+ */
+ if (!icd->dev.parent ||
+ to_soc_camera_host(icd->dev.parent)->nr != icd->iface) {
+ dev_err(&client->dev, "Parent missing or invalid!\n");
+ ret = -ENODEV;
+ goto err;
+ }
+
+ icd->formats = ov9640_fmt_lists;
+ icd->num_formats = ARRAY_SIZE(ov9640_fmt_lists);
+
+ /*
+ * check and show product ID and manufacturer ID
+ */
+
+ ret = ov9640_reg_read(client, OV9640_PID, &pid);
+ if (ret)
+ goto err;
+
+ ret = ov9640_reg_read(client, OV9640_VER, &ver);
+ if (ret)
+ goto err;
+
+ ret = ov9640_reg_read(client, OV9640_MIDH, &midh);
+ if (ret)
+ goto err;
+
+ ret = ov9640_reg_read(client, OV9640_MIDL, &midl);
+ if (ret)
+ goto err;
+
+ switch (VERSION(pid, ver)) {
+ case OV9640_V2:
+ devname = "ov9640";
+ priv->model = V4L2_IDENT_OV9640;
+ priv->revision = 2;
+ case OV9640_V3:
+ devname = "ov9640";
+ priv->model = V4L2_IDENT_OV9640;
+ priv->revision = 3;
+ break;
+ default:
+ dev_err(&client->dev, "Product ID error %x:%x\n", pid, ver);
+ ret = -ENODEV;
+ goto err;
+ }
+
+ dev_info(&client->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
+ devname, pid, ver, midh, midl);
+
+err:
+ return ret;
+}
+
+static struct soc_camera_ops ov9640_ops = {
+ .set_bus_param = ov9640_set_bus_param,
+ .query_bus_param = ov9640_query_bus_param,
+ .controls = ov9640_controls,
+ .num_controls = ARRAY_SIZE(ov9640_controls),
+};
+
+static struct v4l2_subdev_core_ops ov9640_core_ops = {
+ .g_ctrl = ov9640_g_ctrl,
+ .s_ctrl = ov9640_s_ctrl,
+ .g_chip_ident = ov9640_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = ov9640_get_register,
+ .s_register = ov9640_set_register,
+#endif
+
+};
+
+static struct v4l2_subdev_video_ops ov9640_video_ops = {
+ .s_stream = ov9640_s_stream,
+ .s_fmt = ov9640_s_fmt,
+ .try_fmt = ov9640_try_fmt,
+ .cropcap = ov9640_cropcap,
+ .g_crop = ov9640_g_crop,
+
+};
+
+static struct v4l2_subdev_ops ov9640_subdev_ops = {
+ .core = &ov9640_core_ops,
+ .video = &ov9640_video_ops,
+};
+
+/*
+ * i2c_driver function
+ */
+static int ov9640_probe(struct i2c_client *client,
+ const struct i2c_device_id *did)
+{
+ struct ov9640_priv *priv;
+ struct soc_camera_device *icd = client->dev.platform_data;
+ struct soc_camera_link *icl;
+ int ret;
+
+ if (!icd) {
+ dev_err(&client->dev, "Missing soc-camera data!\n");
+ return -EINVAL;
+ }
+
+ icl = to_soc_camera_link(icd);
+ if (!icl) {
+ dev_err(&client->dev, "Missing platform_data for driver\n");
+ return -EINVAL;
+ }
+
+ priv = kzalloc(sizeof(struct ov9640_priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&client->dev,
+ "Failed to allocate memory for private data!\n");
+ return -ENOMEM;
+ }
+
+ v4l2_i2c_subdev_init(&priv->subdev, client, &ov9640_subdev_ops);
+
+ icd->ops = &ov9640_ops;
+
+ ret = ov9640_video_probe(icd, client);
+
+ if (ret) {
+ icd->ops = NULL;
+ i2c_set_clientdata(client, NULL);
+ kfree(priv);
+ }
+
+ return ret;
+}
+
+static int ov9640_remove(struct i2c_client *client)
+{
+ struct ov9640_priv *priv = i2c_get_clientdata(client);
+
+ i2c_set_clientdata(client, NULL);
+ kfree(priv);
+ return 0;
+}
+
+static const struct i2c_device_id ov9640_id[] = {
+ { "ov9640", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ov9640_id);
+
+static struct i2c_driver ov9640_i2c_driver = {
+ .driver = {
+ .name = "ov9640",
+ },
+ .probe = ov9640_probe,
+ .remove = ov9640_remove,
+ .id_table = ov9640_id,
+};
+
+static int __init ov9640_module_init(void)
+{
+ return i2c_add_driver(&ov9640_i2c_driver);
+}
+
+static void __exit ov9640_module_exit(void)
+{
+ i2c_del_driver(&ov9640_i2c_driver);
+}
+
+module_init(ov9640_module_init);
+module_exit(ov9640_module_exit);
+
+MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV96xx");
+MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
+MODULE_LICENSE("GPL v2");