2 * Copyright (C) 2005-2006 Micronas USA Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License (Version 2) as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software Foundation,
15 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/i2c.h>
21 #include <linux/videodev2.h>
22 #include <linux/ioctl.h>
23 #include <linux/slab.h>
36 static u8 global_registers[] = {
44 0xff, 0xff, /* Terminator (reg 0xff does not exist) */
47 static u8 channel_registers[] = {
103 0xff, 0xff, /* Terminator (reg 0xff does not exist) */
106 static int write_reg(struct i2c_client *client, u8 reg, u8 value, int channel)
108 return i2c_smbus_write_byte_data(client, reg | (channel << 6), value);
111 static int write_regs(struct i2c_client *client, u8 *regs, int channel)
115 for (i = 0; regs[i] != 0xff; i += 2)
116 if (i2c_smbus_write_byte_data(client,
117 regs[i] | (channel << 6), regs[i + 1]) < 0)
122 static int wis_tw2804_command(struct i2c_client *client,
123 unsigned int cmd, void *arg)
125 struct wis_tw2804 *dec = i2c_get_clientdata(client);
127 if (cmd == DECODER_SET_CHANNEL) {
130 if (*input < 0 || *input > 3) {
131 printk(KERN_ERR "wis-tw2804: channel %d is not "
132 "between 0 and 3!\n", *input);
135 dec->channel = *input;
136 printk(KERN_DEBUG "wis-tw2804: initializing TW2804 "
137 "channel %d\n", dec->channel);
138 if (dec->channel == 0 &&
139 write_regs(client, global_registers, 0) < 0) {
140 printk(KERN_ERR "wis-tw2804: error initializing "
141 "TW2804 global registers\n");
144 if (write_regs(client, channel_registers, dec->channel) < 0) {
145 printk(KERN_ERR "wis-tw2804: error initializing "
146 "TW2804 channel %d\n", dec->channel);
152 if (dec->channel < 0) {
153 printk(KERN_DEBUG "wis-tw2804: ignoring command %08x until "
154 "channel number is set\n", cmd);
161 v4l2_std_id *input = arg;
163 0x01, *input & V4L2_STD_NTSC ? 0xc4 : 0x84,
164 0x09, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
165 0x0a, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
166 0x0b, *input & V4L2_STD_NTSC ? 0x07 : 0x04,
167 0x0c, *input & V4L2_STD_NTSC ? 0xf0 : 0x20,
168 0x0d, *input & V4L2_STD_NTSC ? 0x40 : 0x4a,
169 0x16, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
170 0x17, *input & V4L2_STD_NTSC ? 0x00 : 0x40,
171 0x20, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
172 0x21, *input & V4L2_STD_NTSC ? 0x07 : 0x0f,
175 write_regs(client, regs, dec->channel);
179 case VIDIOC_QUERYCTRL:
181 struct v4l2_queryctrl *ctrl = arg;
184 case V4L2_CID_BRIGHTNESS:
185 ctrl->type = V4L2_CTRL_TYPE_INTEGER;
186 strncpy(ctrl->name, "Brightness", sizeof(ctrl->name));
190 ctrl->default_value = 128;
193 case V4L2_CID_CONTRAST:
194 ctrl->type = V4L2_CTRL_TYPE_INTEGER;
195 strncpy(ctrl->name, "Contrast", sizeof(ctrl->name));
199 ctrl->default_value = 128;
202 case V4L2_CID_SATURATION:
203 ctrl->type = V4L2_CTRL_TYPE_INTEGER;
204 strncpy(ctrl->name, "Saturation", sizeof(ctrl->name));
208 ctrl->default_value = 128;
212 ctrl->type = V4L2_CTRL_TYPE_INTEGER;
213 strncpy(ctrl->name, "Hue", sizeof(ctrl->name));
217 ctrl->default_value = 128;
225 struct v4l2_control *ctrl = arg;
228 case V4L2_CID_BRIGHTNESS:
229 if (ctrl->value > 255)
230 dec->brightness = 255;
231 else if (ctrl->value < 0)
234 dec->brightness = ctrl->value;
235 write_reg(client, 0x12, dec->brightness, dec->channel);
237 case V4L2_CID_CONTRAST:
238 if (ctrl->value > 255)
240 else if (ctrl->value < 0)
243 dec->contrast = ctrl->value;
244 write_reg(client, 0x11, dec->contrast, dec->channel);
246 case V4L2_CID_SATURATION:
247 if (ctrl->value > 255)
248 dec->saturation = 255;
249 else if (ctrl->value < 0)
252 dec->saturation = ctrl->value;
253 write_reg(client, 0x10, dec->saturation, dec->channel);
256 if (ctrl->value > 255)
258 else if (ctrl->value < 0)
261 dec->hue = ctrl->value;
262 write_reg(client, 0x0f, dec->hue, dec->channel);
269 struct v4l2_control *ctrl = arg;
272 case V4L2_CID_BRIGHTNESS:
273 ctrl->value = dec->brightness;
275 case V4L2_CID_CONTRAST:
276 ctrl->value = dec->contrast;
278 case V4L2_CID_SATURATION:
279 ctrl->value = dec->saturation;
282 ctrl->value = dec->hue;
293 static int wis_tw2804_probe(struct i2c_client *client,
294 const struct i2c_device_id *id)
296 struct i2c_adapter *adapter = client->adapter;
297 struct wis_tw2804 *dec;
299 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
302 dec = kmalloc(sizeof(struct wis_tw2804), GFP_KERNEL);
307 dec->norm = V4L2_STD_NTSC;
308 dec->brightness = 128;
310 dec->saturation = 128;
312 i2c_set_clientdata(client, dec);
314 printk(KERN_DEBUG "wis-tw2804: creating TW2804 at address %d on %s\n",
315 client->addr, adapter->name);
320 static int wis_tw2804_remove(struct i2c_client *client)
322 struct wis_tw2804 *dec = i2c_get_clientdata(client);
328 static const struct i2c_device_id wis_tw2804_id[] = {
332 MODULE_DEVICE_TABLE(i2c, wis_tw2804_id);
334 static struct i2c_driver wis_tw2804_driver = {
336 .name = "WIS TW2804 I2C driver",
338 .probe = wis_tw2804_probe,
339 .remove = wis_tw2804_remove,
340 .command = wis_tw2804_command,
341 .id_table = wis_tw2804_id,
344 static int __init wis_tw2804_init(void)
346 return i2c_add_driver(&wis_tw2804_driver);
349 static void __exit wis_tw2804_cleanup(void)
351 i2c_del_driver(&wis_tw2804_driver);
354 module_init(wis_tw2804_init);
355 module_exit(wis_tw2804_cleanup);
357 MODULE_LICENSE("GPL v2");