Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / bt856.c
blob4d47a0a0e974c28b089baa75352fc8f2e49aec6e
1 /*
2 * bt856 - BT856A Digital Video Encoder (Rockwell Part)
4 * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
7 * Modifications for LML33/DC10plus unified driver
8 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
10 * This code was modify/ported from the saa7111 driver written
11 * by Dave Perks.
13 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
14 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/delay.h>
34 #include <linux/errno.h>
35 #include <linux/fs.h>
36 #include <linux/kernel.h>
37 #include <linux/major.h>
38 #include <linux/slab.h>
39 #include <linux/mm.h>
40 #include <linux/pci.h>
41 #include <linux/signal.h>
42 #include <asm/io.h>
43 #include <asm/pgtable.h>
44 #include <asm/page.h>
45 #include <linux/sched.h>
46 #include <linux/types.h>
48 #include <linux/videodev.h>
49 #include <asm/uaccess.h>
51 MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
52 MODULE_AUTHOR("Mike Bernson & Dave Perks");
53 MODULE_LICENSE("GPL");
55 #include <linux/i2c.h>
57 #define I2C_NAME(s) (s)->name
59 #include <linux/video_encoder.h>
61 static int debug = 0;
62 module_param(debug, int, 0);
63 MODULE_PARM_DESC(debug, "Debug level (0-1)");
65 #define dprintk(num, format, args...) \
66 do { \
67 if (debug >= num) \
68 printk(format, ##args); \
69 } while (0)
71 /* ----------------------------------------------------------------------- */
73 #define REG_OFFSET 0xDA
74 #define BT856_NR_REG 6
76 struct bt856 {
77 unsigned char reg[BT856_NR_REG];
79 int norm;
80 int enable;
83 #define I2C_BT856 0x88
85 /* ----------------------------------------------------------------------- */
87 static inline int
88 bt856_write (struct i2c_client *client,
89 u8 reg,
90 u8 value)
92 struct bt856 *encoder = i2c_get_clientdata(client);
94 encoder->reg[reg - REG_OFFSET] = value;
95 return i2c_smbus_write_byte_data(client, reg, value);
98 static inline int
99 bt856_setbit (struct i2c_client *client,
100 u8 reg,
101 u8 bit,
102 u8 value)
104 struct bt856 *encoder = i2c_get_clientdata(client);
106 return bt856_write(client, reg,
107 (encoder->
108 reg[reg - REG_OFFSET] & ~(1 << bit)) |
109 (value ? (1 << bit) : 0));
112 static void
113 bt856_dump (struct i2c_client *client)
115 int i;
116 struct bt856 *encoder = i2c_get_clientdata(client);
118 printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
119 for (i = 0; i < BT856_NR_REG; i += 2)
120 printk(" %02x", encoder->reg[i]);
121 printk("\n");
124 /* ----------------------------------------------------------------------- */
126 static int
127 bt856_command (struct i2c_client *client,
128 unsigned int cmd,
129 void *arg)
131 struct bt856 *encoder = i2c_get_clientdata(client);
133 switch (cmd) {
135 case 0:
136 /* This is just for testing!!! */
137 dprintk(1, KERN_INFO "bt856: init\n");
138 bt856_write(client, 0xdc, 0x18);
139 bt856_write(client, 0xda, 0);
140 bt856_write(client, 0xde, 0);
142 bt856_setbit(client, 0xdc, 3, 1);
143 //bt856_setbit(client, 0xdc, 6, 0);
144 bt856_setbit(client, 0xdc, 4, 1);
146 switch (encoder->norm) {
148 case VIDEO_MODE_NTSC:
149 bt856_setbit(client, 0xdc, 2, 0);
150 break;
152 case VIDEO_MODE_PAL:
153 bt856_setbit(client, 0xdc, 2, 1);
154 break;
157 bt856_setbit(client, 0xdc, 1, 1);
158 bt856_setbit(client, 0xde, 4, 0);
159 bt856_setbit(client, 0xde, 3, 1);
160 if (debug != 0)
161 bt856_dump(client);
162 break;
164 case ENCODER_GET_CAPABILITIES:
166 struct video_encoder_capability *cap = arg;
168 dprintk(1, KERN_INFO "%s: get capabilities\n",
169 I2C_NAME(client));
171 cap->flags = VIDEO_ENCODER_PAL |
172 VIDEO_ENCODER_NTSC |
173 VIDEO_ENCODER_CCIR;
174 cap->inputs = 2;
175 cap->outputs = 1;
177 break;
179 case ENCODER_SET_NORM:
181 int *iarg = arg;
183 dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
184 *iarg);
186 switch (*iarg) {
188 case VIDEO_MODE_NTSC:
189 bt856_setbit(client, 0xdc, 2, 0);
190 break;
192 case VIDEO_MODE_PAL:
193 bt856_setbit(client, 0xdc, 2, 1);
194 bt856_setbit(client, 0xda, 0, 0);
195 //bt856_setbit(client, 0xda, 0, 1);
196 break;
198 default:
199 return -EINVAL;
202 encoder->norm = *iarg;
203 if (debug != 0)
204 bt856_dump(client);
206 break;
208 case ENCODER_SET_INPUT:
210 int *iarg = arg;
212 dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
213 *iarg);
215 /* We only have video bus.
216 * iarg = 0: input is from bt819
217 * iarg = 1: input is from ZR36060 */
219 switch (*iarg) {
221 case 0:
222 bt856_setbit(client, 0xde, 4, 0);
223 bt856_setbit(client, 0xde, 3, 1);
224 bt856_setbit(client, 0xdc, 3, 1);
225 bt856_setbit(client, 0xdc, 6, 0);
226 break;
227 case 1:
228 bt856_setbit(client, 0xde, 4, 0);
229 bt856_setbit(client, 0xde, 3, 1);
230 bt856_setbit(client, 0xdc, 3, 1);
231 bt856_setbit(client, 0xdc, 6, 1);
232 break;
233 case 2: // Color bar
234 bt856_setbit(client, 0xdc, 3, 0);
235 bt856_setbit(client, 0xde, 4, 1);
236 break;
237 default:
238 return -EINVAL;
242 if (debug != 0)
243 bt856_dump(client);
245 break;
247 case ENCODER_SET_OUTPUT:
249 int *iarg = arg;
251 dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
252 *iarg);
254 /* not much choice of outputs */
255 if (*iarg != 0) {
256 return -EINVAL;
259 break;
261 case ENCODER_ENABLE_OUTPUT:
263 int *iarg = arg;
265 encoder->enable = !!*iarg;
267 dprintk(1, KERN_INFO "%s: enable output %d\n",
268 I2C_NAME(client), encoder->enable);
270 break;
272 default:
273 return -EINVAL;
276 return 0;
279 /* ----------------------------------------------------------------------- */
282 * Generic i2c probe
283 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
285 static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };
287 static unsigned short ignore = I2C_CLIENT_END;
289 static struct i2c_client_address_data addr_data = {
290 .normal_i2c = normal_i2c,
291 .probe = &ignore,
292 .ignore = &ignore,
295 static struct i2c_driver i2c_driver_bt856;
297 static int
298 bt856_detect_client (struct i2c_adapter *adapter,
299 int address,
300 int kind)
302 int i;
303 struct i2c_client *client;
304 struct bt856 *encoder;
306 dprintk(1,
307 KERN_INFO
308 "bt856.c: detecting bt856 client on address 0x%x\n",
309 address << 1);
311 /* Check if the adapter supports the needed features */
312 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
313 return 0;
315 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
316 if (client == 0)
317 return -ENOMEM;
318 client->addr = address;
319 client->adapter = adapter;
320 client->driver = &i2c_driver_bt856;
321 strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
323 encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
324 if (encoder == NULL) {
325 kfree(client);
326 return -ENOMEM;
328 encoder->norm = VIDEO_MODE_NTSC;
329 encoder->enable = 1;
330 i2c_set_clientdata(client, encoder);
332 i = i2c_attach_client(client);
333 if (i) {
334 kfree(client);
335 kfree(encoder);
336 return i;
339 bt856_write(client, 0xdc, 0x18);
340 bt856_write(client, 0xda, 0);
341 bt856_write(client, 0xde, 0);
343 bt856_setbit(client, 0xdc, 3, 1);
344 //bt856_setbit(client, 0xdc, 6, 0);
345 bt856_setbit(client, 0xdc, 4, 1);
347 switch (encoder->norm) {
349 case VIDEO_MODE_NTSC:
350 bt856_setbit(client, 0xdc, 2, 0);
351 break;
353 case VIDEO_MODE_PAL:
354 bt856_setbit(client, 0xdc, 2, 1);
355 break;
358 bt856_setbit(client, 0xdc, 1, 1);
359 bt856_setbit(client, 0xde, 4, 0);
360 bt856_setbit(client, 0xde, 3, 1);
362 if (debug != 0)
363 bt856_dump(client);
365 dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
366 client->addr << 1);
368 return 0;
371 static int
372 bt856_attach_adapter (struct i2c_adapter *adapter)
374 dprintk(1,
375 KERN_INFO
376 "bt856.c: starting probe for adapter %s (0x%x)\n",
377 I2C_NAME(adapter), adapter->id);
378 return i2c_probe(adapter, &addr_data, &bt856_detect_client);
381 static int
382 bt856_detach_client (struct i2c_client *client)
384 struct bt856 *encoder = i2c_get_clientdata(client);
385 int err;
387 err = i2c_detach_client(client);
388 if (err) {
389 return err;
392 kfree(encoder);
393 kfree(client);
395 return 0;
398 /* ----------------------------------------------------------------------- */
400 static struct i2c_driver i2c_driver_bt856 = {
401 .driver = {
402 .name = "bt856",
405 .id = I2C_DRIVERID_BT856,
407 .attach_adapter = bt856_attach_adapter,
408 .detach_client = bt856_detach_client,
409 .command = bt856_command,
412 static int __init
413 bt856_init (void)
415 return i2c_add_driver(&i2c_driver_bt856);
418 static void __exit
419 bt856_exit (void)
421 i2c_del_driver(&i2c_driver_bt856);
424 module_init(bt856_init);
425 module_exit(bt856_exit);