--- /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 <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+
+MODULE_DESCRIPTION("TW9906 I2C subdev driver");
+MODULE_LICENSE("GPL v2");
+
+struct tw9906 {
+ struct v4l2_subdev sd;
+ struct v4l2_ctrl_handler hdl;
+ v4l2_std_id norm;
+};
+
+static inline struct tw9906 *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct tw9906, sd);
+}
+
+static const u8 initial_registers[] = {
+ 0x02, 0x40, /* input 0, composite */
+ 0x03, 0xa2, /* correct digital format */
+ 0x05, 0x81, /* or 0x01 for PAL */
+ 0x07, 0x02, /* window */
+ 0x08, 0x14, /* window */
+ 0x09, 0xf0, /* window */
+ 0x0a, 0x10, /* window */
+ 0x0b, 0xd0, /* window */
+ 0x0d, 0x00, /* scaling */
+ 0x0e, 0x11, /* scaling */
+ 0x0f, 0x00, /* scaling */
+ 0x10, 0x00, /* brightness */
+ 0x11, 0x60, /* contrast */
+ 0x12, 0x11, /* sharpness */
+ 0x13, 0x7e, /* U gain */
+ 0x14, 0x7e, /* V gain */
+ 0x15, 0x00, /* hue */
+ 0x19, 0x57, /* vbi */
+ 0x1a, 0x0f,
+ 0x1b, 0x40,
+ 0x29, 0x03,
+ 0x55, 0x00,
+ 0x6b, 0x26,
+ 0x6c, 0x36,
+ 0x6d, 0xf0,
+ 0x6e, 0x41,
+ 0x6f, 0x13,
+ 0xad, 0x70,
+ 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 tw9906_s_video_routing(struct v4l2_subdev *sd, u32 input,
+ u32 output, u32 config)
+{
+ write_reg(sd, 0x02, 0x40 | (input << 1));
+ return 0;
+}
+
+static int tw9906_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
+{
+ struct tw9906 *dec = to_state(sd);
+ bool is_60hz = norm & V4L2_STD_525_60;
+ static const u8 config_60hz[] = {
+ 0x05, 0x81,
+ 0x07, 0x02,
+ 0x08, 0x14,
+ 0x09, 0xf0,
+ 0, 0,
+ };
+ static const u8 config_50hz[] = {
+ 0x05, 0x01,
+ 0x07, 0x12,
+ 0x08, 0x18,
+ 0x09, 0x20,
+ 0, 0,
+ };
+
+ write_regs(sd, is_60hz ? config_60hz : config_50hz);
+ dec->norm = norm;
+ return 0;
+}
+
+static int tw9906_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct tw9906 *dec = container_of(ctrl->handler, struct tw9906, 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 tw9906_log_status(struct v4l2_subdev *sd)
+{
+ struct tw9906 *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 tw9906_ctrl_ops = {
+ .s_ctrl = tw9906_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops tw9906_core_ops = {
+ .log_status = tw9906_log_status,
+};
+
+static const struct v4l2_subdev_video_ops tw9906_video_ops = {
+ .s_std = tw9906_s_std,
+ .s_routing = tw9906_s_video_routing,
+};
+
+static const struct v4l2_subdev_ops tw9906_ops = {
+ .core = &tw9906_core_ops,
+ .video = &tw9906_video_ops,
+};
+
+static int tw9906_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tw9906 *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, &tw9906_ops);
+ hdl = &dec->hdl;
+ v4l2_ctrl_handler_init(hdl, 4);
+ v4l2_ctrl_new_std(hdl, &tw9906_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
+ v4l2_ctrl_new_std(hdl, &tw9906_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 255, 1, 0x60);
+ v4l2_ctrl_new_std(hdl, &tw9906_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 tw9906 */
+ dec->norm = V4L2_STD_NTSC;
+
+ if (write_regs(sd, initial_registers) < 0) {
+ v4l2_err(client, "error initializing TW9906\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int tw9906_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 tw9906_id[] = {
+ { "tw9906", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tw9906_id);
+
+static struct i2c_driver tw9906_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "tw9906",
+ },
+ .probe = tw9906_probe,
+ .remove = tw9906_remove,
+ .id_table = tw9906_id,
+};
+module_i2c_driver(tw9906_driver);
Code Review / kvmfornfv.git / blobdiff