--- /dev/null
+/*
+ * Copyright (C) 2005-2006 Micronas USA Inc.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+#include <linux/slab.h>
+
+MODULE_DESCRIPTION("TW9903 I2C subdev driver");
+MODULE_LICENSE("GPL v2");
+
+/*
+ * This driver is based on the wis-tw9903.c source that was in
+ * drivers/staging/media/go7007. That source had commented out code for
+ * saturation and scaling (neither seemed to work). If anyone ever gets
+ * hardware to test this driver, then that code might be useful to look at.
+ * You need to get the kernel sources of, say, kernel 3.8 where that
+ * wis-tw9903 driver is still present.
+ */
+
+struct tw9903 {
+ struct v4l2_subdev sd;
+ struct v4l2_ctrl_handler hdl;
+ v4l2_std_id norm;
+};
+
+static inline struct tw9903 *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct tw9903, sd);
+}
+
+static const u8 initial_registers[] = {
+ 0x02, 0x44, /* input 1, composite */
+ 0x03, 0x92, /* correct digital format */
+ 0x04, 0x00,
+ 0x05, 0x80, /* or 0x00 for PAL */
+ 0x06, 0x40, /* second internal current reference */
+ 0x07, 0x02, /* window */
+ 0x08, 0x14, /* window */
+ 0x09, 0xf0, /* window */
+ 0x0a, 0x81, /* window */
+ 0x0b, 0xd0, /* window */
+ 0x0c, 0x8c,
+ 0x0d, 0x00, /* scaling */
+ 0x0e, 0x11, /* scaling */
+ 0x0f, 0x00, /* scaling */
+ 0x10, 0x00, /* brightness */
+ 0x11, 0x60, /* contrast */
+ 0x12, 0x01, /* sharpness */
+ 0x13, 0x7f, /* U gain */
+ 0x14, 0x5a, /* V gain */
+ 0x15, 0x00, /* hue */
+ 0x16, 0xc3, /* sharpness */
+ 0x18, 0x00,
+ 0x19, 0x58, /* vbi */
+ 0x1a, 0x80,
+ 0x1c, 0x0f, /* video norm */
+ 0x1d, 0x7f, /* video norm */
+ 0x20, 0xa0, /* clamping gain (working 0x50) */
+ 0x21, 0x22,
+ 0x22, 0xf0,
+ 0x23, 0xfe,
+ 0x24, 0x3c,
+ 0x25, 0x38,
+ 0x26, 0x44,
+ 0x27, 0x20,
+ 0x28, 0x00,
+ 0x29, 0x15,
+ 0x2a, 0xa0,
+ 0x2b, 0x44,
+ 0x2c, 0x37,
+ 0x2d, 0x00,
+ 0x2e, 0xa5, /* burst PLL control (working: a9) */
+ 0x2f, 0xe0, /* 0xea is blue test frame -- 0xe0 for normal */
+ 0x31, 0x00,
+ 0x33, 0x22,
+ 0x34, 0x11,
+ 0x35, 0x35,
+ 0x3b, 0x05,
+ 0x06, 0xc0, /* reset device */
+ 0x00, 0x00, /* Terminator (reg 0x00 is read-only) */
+};
+
+static int write_reg(struct v4l2_subdev *sd, u8 reg, u8 value)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static int write_regs(struct v4l2_subdev *sd, const u8 *regs)
+{
+ int i;
+
+ for (i = 0; regs[i] != 0x00; i += 2)
+ if (write_reg(sd, regs[i], regs[i + 1]) < 0)
+ return -1;
+ return 0;
+}
+
+static int tw9903_s_video_routing(struct v4l2_subdev *sd, u32 input,
+ u32 output, u32 config)
+{
+ write_reg(sd, 0x02, 0x40 | (input << 1));
+ return 0;
+}
+
+static int tw9903_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
+{
+ struct tw9903 *dec = to_state(sd);
+ bool is_60hz = norm & V4L2_STD_525_60;
+ static const u8 config_60hz[] = {
+ 0x05, 0x80,
+ 0x07, 0x02,
+ 0x08, 0x14,
+ 0x09, 0xf0,
+ 0, 0,
+ };
+ static const u8 config_50hz[] = {
+ 0x05, 0x00,
+ 0x07, 0x12,
+ 0x08, 0x18,
+ 0x09, 0x20,
+ 0, 0,
+ };
+
+ write_regs(sd, is_60hz ? config_60hz : config_50hz);
+ dec->norm = norm;
+ return 0;
+}
+
+
+static int tw9903_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct tw9903 *dec = container_of(ctrl->handler, struct tw9903, hdl);
+ struct v4l2_subdev *sd = &dec->sd;
+
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ write_reg(sd, 0x10, ctrl->val);
+ break;
+ case V4L2_CID_CONTRAST:
+ write_reg(sd, 0x11, ctrl->val);
+ break;
+ case V4L2_CID_HUE:
+ write_reg(sd, 0x15, ctrl->val);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int tw9903_log_status(struct v4l2_subdev *sd)
+{
+ struct tw9903 *dec = to_state(sd);
+ bool is_60hz = dec->norm & V4L2_STD_525_60;
+
+ v4l2_info(sd, "Standard: %d Hz\n", is_60hz ? 60 : 50);
+ v4l2_ctrl_subdev_log_status(sd);
+ return 0;
+}
+
+/* --------------------------------------------------------------------------*/
+
+static const struct v4l2_ctrl_ops tw9903_ctrl_ops = {
+ .s_ctrl = tw9903_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops tw9903_core_ops = {
+ .log_status = tw9903_log_status,
+};
+
+static const struct v4l2_subdev_video_ops tw9903_video_ops = {
+ .s_std = tw9903_s_std,
+ .s_routing = tw9903_s_video_routing,
+};
+
+static const struct v4l2_subdev_ops tw9903_ops = {
+ .core = &tw9903_core_ops,
+ .video = &tw9903_video_ops,
+};
+
+/* --------------------------------------------------------------------------*/
+
+static int tw9903_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tw9903 *dec;
+ struct v4l2_subdev *sd;
+ struct v4l2_ctrl_handler *hdl;
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ v4l_info(client, "chip found @ 0x%02x (%s)\n",
+ client->addr << 1, client->adapter->name);
+
+ dec = devm_kzalloc(&client->dev, sizeof(*dec), GFP_KERNEL);
+ if (dec == NULL)
+ return -ENOMEM;
+ sd = &dec->sd;
+ v4l2_i2c_subdev_init(sd, client, &tw9903_ops);
+ hdl = &dec->hdl;
+ v4l2_ctrl_handler_init(hdl, 4);
+ v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
+ v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 255, 1, 0x60);
+ v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops,
+ V4L2_CID_HUE, -128, 127, 1, 0);
+ sd->ctrl_handler = hdl;
+ if (hdl->error) {
+ int err = hdl->error;
+
+ v4l2_ctrl_handler_free(hdl);
+ return err;
+ }
+
+ /* Initialize tw9903 */
+ dec->norm = V4L2_STD_NTSC;
+
+ if (write_regs(sd, initial_registers) < 0) {
+ v4l2_err(client, "error initializing TW9903\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int tw9903_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+ v4l2_device_unregister_subdev(sd);
+ v4l2_ctrl_handler_free(&to_state(sd)->hdl);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id tw9903_id[] = {
+ { "tw9903", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tw9903_id);
+
+static struct i2c_driver tw9903_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "tw9903",
+ },
+ .probe = tw9903_probe,
+ .remove = tw9903_remove,
+ .id_table = tw9903_id,
+};
+module_i2c_driver(tw9903_driver);
Code Review / kvmfornfv.git / blobdiff