[PATCH] i2c: Drop i2c_driver.flags, 2 of 3
[linux-2.6.git] / drivers / media / video / bt856.c
1 /* 
2  * bt856 - BT856A Digital Video Encoder (Rockwell Part)
3  *
4  * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
5  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
6  *
7  * Modifications for LML33/DC10plus unified driver
8  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
9  *
10  * This code was modify/ported from the saa7111 driver written
11  * by Dave Perks.
12  *
13  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
14  *   - moved over to linux>=2.4.x i2c protocol (9/9/2002)
15  *
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.
20  *
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.
25  *
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.
29  */
30
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>
47
48 #include <linux/videodev.h>
49 #include <asm/uaccess.h>
50
51 MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
52 MODULE_AUTHOR("Mike Bernson & Dave Perks");
53 MODULE_LICENSE("GPL");
54
55 #include <linux/i2c.h>
56 #include <linux/i2c-dev.h>
57
58 #define I2C_NAME(s) (s)->name
59
60 #include <linux/video_encoder.h>
61
62 static int debug = 0;
63 module_param(debug, int, 0);
64 MODULE_PARM_DESC(debug, "Debug level (0-1)");
65
66 #define dprintk(num, format, args...) \
67         do { \
68                 if (debug >= num) \
69                         printk(format, ##args); \
70         } while (0)
71
72 /* ----------------------------------------------------------------------- */
73
74 #define REG_OFFSET  0xCE
75
76 struct bt856 {
77         unsigned char reg[32];
78
79         int norm;
80         int enable;
81         int bright;
82         int contrast;
83         int hue;
84         int sat;
85 };
86
87 #define   I2C_BT856        0x88
88
89 /* ----------------------------------------------------------------------- */
90
91 static inline int
92 bt856_write (struct i2c_client *client,
93              u8                 reg,
94              u8                 value)
95 {
96         struct bt856 *encoder = i2c_get_clientdata(client);
97
98         encoder->reg[reg - REG_OFFSET] = value;
99         return i2c_smbus_write_byte_data(client, reg, value);
100 }
101
102 static inline int
103 bt856_setbit (struct i2c_client *client,
104               u8                 reg,
105               u8                 bit,
106               u8                 value)
107 {
108         struct bt856 *encoder = i2c_get_clientdata(client);
109
110         return bt856_write(client, reg,
111                            (encoder->
112                             reg[reg - REG_OFFSET] & ~(1 << bit)) |
113                             (value ? (1 << bit) : 0));
114 }
115
116 static void
117 bt856_dump (struct i2c_client *client)
118 {
119         int i;
120         struct bt856 *encoder = i2c_get_clientdata(client);
121
122         printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
123         for (i = 0xd6; i <= 0xde; i += 2)
124                 printk(" %02x", encoder->reg[i - REG_OFFSET]);
125         printk("\n");
126 }
127
128 /* ----------------------------------------------------------------------- */
129
130 static int
131 bt856_command (struct i2c_client *client,
132                unsigned int       cmd,
133                void              *arg)
134 {
135         struct bt856 *encoder = i2c_get_clientdata(client);
136
137         switch (cmd) {
138
139         case 0:
140                 /* This is just for testing!!! */
141                 dprintk(1, KERN_INFO "bt856: init\n");
142                 bt856_write(client, 0xdc, 0x18);
143                 bt856_write(client, 0xda, 0);
144                 bt856_write(client, 0xde, 0);
145
146                 bt856_setbit(client, 0xdc, 3, 1);
147                 //bt856_setbit(client, 0xdc, 6, 0);
148                 bt856_setbit(client, 0xdc, 4, 1);
149
150                 switch (encoder->norm) {
151
152                 case VIDEO_MODE_NTSC:
153                         bt856_setbit(client, 0xdc, 2, 0);
154                         break;
155
156                 case VIDEO_MODE_PAL:
157                         bt856_setbit(client, 0xdc, 2, 1);
158                         break;
159                 }
160
161                 bt856_setbit(client, 0xdc, 1, 1);
162                 bt856_setbit(client, 0xde, 4, 0);
163                 bt856_setbit(client, 0xde, 3, 1);
164                 if (debug != 0)
165                         bt856_dump(client);
166                 break;
167
168         case ENCODER_GET_CAPABILITIES:
169         {
170                 struct video_encoder_capability *cap = arg;
171
172                 dprintk(1, KERN_INFO "%s: get capabilities\n",
173                         I2C_NAME(client));
174
175                 cap->flags = VIDEO_ENCODER_PAL |
176                              VIDEO_ENCODER_NTSC |
177                              VIDEO_ENCODER_CCIR;
178                 cap->inputs = 2;
179                 cap->outputs = 1;
180         }
181                 break;
182
183         case ENCODER_SET_NORM:
184         {
185                 int *iarg = arg;
186
187                 dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
188                         *iarg);
189
190                 switch (*iarg) {
191
192                 case VIDEO_MODE_NTSC:
193                         bt856_setbit(client, 0xdc, 2, 0);
194                         break;
195
196                 case VIDEO_MODE_PAL:
197                         bt856_setbit(client, 0xdc, 2, 1);
198                         bt856_setbit(client, 0xda, 0, 0);
199                         //bt856_setbit(client, 0xda, 0, 1);
200                         break;
201
202                 default:
203                         return -EINVAL;
204
205                 }
206                 encoder->norm = *iarg;
207                 if (debug != 0)
208                         bt856_dump(client);
209         }
210                 break;
211
212         case ENCODER_SET_INPUT:
213         {
214                 int *iarg = arg;
215
216                 dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
217                         *iarg);
218
219                 /* We only have video bus.
220                  * iarg = 0: input is from bt819
221                  * iarg = 1: input is from ZR36060 */
222
223                 switch (*iarg) {
224
225                 case 0:
226                         bt856_setbit(client, 0xde, 4, 0);
227                         bt856_setbit(client, 0xde, 3, 1);
228                         bt856_setbit(client, 0xdc, 3, 1);
229                         bt856_setbit(client, 0xdc, 6, 0);
230                         break;
231                 case 1:
232                         bt856_setbit(client, 0xde, 4, 0);
233                         bt856_setbit(client, 0xde, 3, 1);
234                         bt856_setbit(client, 0xdc, 3, 1);
235                         bt856_setbit(client, 0xdc, 6, 1);
236                         break;
237                 case 2: // Color bar
238                         bt856_setbit(client, 0xdc, 3, 0);
239                         bt856_setbit(client, 0xde, 4, 1);
240                         break;
241                 default:
242                         return -EINVAL;
243
244                 }
245
246                 if (debug != 0)
247                         bt856_dump(client);
248         }
249                 break;
250
251         case ENCODER_SET_OUTPUT:
252         {
253                 int *iarg = arg;
254
255                 dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
256                         *iarg);
257
258                 /* not much choice of outputs */
259                 if (*iarg != 0) {
260                         return -EINVAL;
261                 }
262         }
263                 break;
264
265         case ENCODER_ENABLE_OUTPUT:
266         {
267                 int *iarg = arg;
268
269                 encoder->enable = !!*iarg;
270
271                 dprintk(1, KERN_INFO "%s: enable output %d\n",
272                         I2C_NAME(client), encoder->enable);
273         }
274                 break;
275
276         default:
277                 return -EINVAL;
278         }
279
280         return 0;
281 }
282
283 /* ----------------------------------------------------------------------- */
284
285 /*
286  * Generic i2c probe
287  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
288  */
289 static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };
290
291 static unsigned short ignore = I2C_CLIENT_END;
292                                                                                 
293 static struct i2c_client_address_data addr_data = {
294         .normal_i2c             = normal_i2c,
295         .probe                  = &ignore,
296         .ignore                 = &ignore,
297 };
298
299 static struct i2c_driver i2c_driver_bt856;
300
301 static int
302 bt856_detect_client (struct i2c_adapter *adapter,
303                      int                 address,
304                      int                 kind)
305 {
306         int i;
307         struct i2c_client *client;
308         struct bt856 *encoder;
309
310         dprintk(1,
311                 KERN_INFO
312                 "bt856.c: detecting bt856 client on address 0x%x\n",
313                 address << 1);
314
315         /* Check if the adapter supports the needed features */
316         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
317                 return 0;
318
319         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
320         if (client == 0)
321                 return -ENOMEM;
322         memset(client, 0, sizeof(struct i2c_client));
323         client->addr = address;
324         client->adapter = adapter;
325         client->driver = &i2c_driver_bt856;
326         client->flags = I2C_CLIENT_ALLOW_USE;
327         strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
328
329         encoder = kmalloc(sizeof(struct bt856), GFP_KERNEL);
330         if (encoder == NULL) {
331                 kfree(client);
332                 return -ENOMEM;
333         }
334         memset(encoder, 0, sizeof(struct bt856));
335         encoder->norm = VIDEO_MODE_NTSC;
336         encoder->enable = 1;
337         i2c_set_clientdata(client, encoder);
338
339         i = i2c_attach_client(client);
340         if (i) {
341                 kfree(client);
342                 kfree(encoder);
343                 return i;
344         }
345
346         bt856_write(client, 0xdc, 0x18);
347         bt856_write(client, 0xda, 0);
348         bt856_write(client, 0xde, 0);
349
350         bt856_setbit(client, 0xdc, 3, 1);
351         //bt856_setbit(client, 0xdc, 6, 0);
352         bt856_setbit(client, 0xdc, 4, 1);
353
354         switch (encoder->norm) {
355
356         case VIDEO_MODE_NTSC:
357                 bt856_setbit(client, 0xdc, 2, 0);
358                 break;
359
360         case VIDEO_MODE_PAL:
361                 bt856_setbit(client, 0xdc, 2, 1);
362                 break;
363         }
364
365         bt856_setbit(client, 0xdc, 1, 1);
366         bt856_setbit(client, 0xde, 4, 0);
367         bt856_setbit(client, 0xde, 3, 1);
368
369         if (debug != 0)
370                 bt856_dump(client);
371
372         dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
373                 client->addr << 1);
374
375         return 0;
376 }
377
378 static int
379 bt856_attach_adapter (struct i2c_adapter *adapter)
380 {
381         dprintk(1,
382                 KERN_INFO
383                 "bt856.c: starting probe for adapter %s (0x%x)\n",
384                 I2C_NAME(adapter), adapter->id);
385         return i2c_probe(adapter, &addr_data, &bt856_detect_client);
386 }
387
388 static int
389 bt856_detach_client (struct i2c_client *client)
390 {
391         struct bt856 *encoder = i2c_get_clientdata(client);
392         int err;
393
394         err = i2c_detach_client(client);
395         if (err) {
396                 return err;
397         }
398
399         kfree(encoder);
400         kfree(client);
401
402         return 0;
403 }
404
405 /* ----------------------------------------------------------------------- */
406
407 static struct i2c_driver i2c_driver_bt856 = {
408         .owner = THIS_MODULE,
409         .name = "bt856",
410
411         .id = I2C_DRIVERID_BT856,
412
413         .attach_adapter = bt856_attach_adapter,
414         .detach_client = bt856_detach_client,
415         .command = bt856_command,
416 };
417
418 static int __init
419 bt856_init (void)
420 {
421         return i2c_add_driver(&i2c_driver_bt856);
422 }
423
424 static void __exit
425 bt856_exit (void)
426 {
427         i2c_del_driver(&i2c_driver_bt856);
428 }
429
430 module_init(bt856_init);
431 module_exit(bt856_exit);