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Commit | Line | Data |
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d56410e0 | 1 | /* |
1da177e4 LT |
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> | |
1da177e4 | 40 | #include <linux/signal.h> |
18f3fa1e MCC |
41 | #include <linux/types.h> |
42 | #include <linux/i2c.h> | |
43 | #include <linux/video_encoder.h> | |
1da177e4 LT |
44 | #include <asm/io.h> |
45 | #include <asm/pgtable.h> | |
46 | #include <asm/page.h> | |
18f3fa1e | 47 | #include <asm/uaccess.h> |
1da177e4 LT |
48 | |
49 | #include <linux/videodev.h> | |
1da177e4 LT |
50 | |
51 | MODULE_DESCRIPTION("Brooktree-856A video encoder driver"); | |
52 | MODULE_AUTHOR("Mike Bernson & Dave Perks"); | |
53 | MODULE_LICENSE("GPL"); | |
54 | ||
1da177e4 LT |
55 | |
56 | #define I2C_NAME(s) (s)->name | |
57 | ||
1da177e4 | 58 | |
ff699e6b | 59 | static int debug; |
1da177e4 LT |
60 | module_param(debug, int, 0); |
61 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); | |
62 | ||
63 | #define dprintk(num, format, args...) \ | |
64 | do { \ | |
65 | if (debug >= num) \ | |
66 | printk(format, ##args); \ | |
67 | } while (0) | |
68 | ||
69 | /* ----------------------------------------------------------------------- */ | |
70 | ||
f49a5eae JD |
71 | #define REG_OFFSET 0xDA |
72 | #define BT856_NR_REG 6 | |
1da177e4 LT |
73 | |
74 | struct bt856 { | |
f49a5eae | 75 | unsigned char reg[BT856_NR_REG]; |
1da177e4 LT |
76 | |
77 | int norm; | |
78 | int enable; | |
1da177e4 LT |
79 | }; |
80 | ||
81 | #define I2C_BT856 0x88 | |
82 | ||
83 | /* ----------------------------------------------------------------------- */ | |
84 | ||
85 | static inline int | |
86 | bt856_write (struct i2c_client *client, | |
87 | u8 reg, | |
88 | u8 value) | |
89 | { | |
90 | struct bt856 *encoder = i2c_get_clientdata(client); | |
91 | ||
92 | encoder->reg[reg - REG_OFFSET] = value; | |
93 | return i2c_smbus_write_byte_data(client, reg, value); | |
94 | } | |
95 | ||
96 | static inline int | |
97 | bt856_setbit (struct i2c_client *client, | |
98 | u8 reg, | |
99 | u8 bit, | |
100 | u8 value) | |
101 | { | |
102 | struct bt856 *encoder = i2c_get_clientdata(client); | |
103 | ||
104 | return bt856_write(client, reg, | |
105 | (encoder-> | |
106 | reg[reg - REG_OFFSET] & ~(1 << bit)) | | |
107 | (value ? (1 << bit) : 0)); | |
108 | } | |
109 | ||
110 | static void | |
111 | bt856_dump (struct i2c_client *client) | |
112 | { | |
113 | int i; | |
114 | struct bt856 *encoder = i2c_get_clientdata(client); | |
115 | ||
116 | printk(KERN_INFO "%s: register dump:", I2C_NAME(client)); | |
f49a5eae JD |
117 | for (i = 0; i < BT856_NR_REG; i += 2) |
118 | printk(" %02x", encoder->reg[i]); | |
1da177e4 LT |
119 | printk("\n"); |
120 | } | |
121 | ||
122 | /* ----------------------------------------------------------------------- */ | |
123 | ||
124 | static int | |
125 | bt856_command (struct i2c_client *client, | |
126 | unsigned int cmd, | |
127 | void *arg) | |
128 | { | |
129 | struct bt856 *encoder = i2c_get_clientdata(client); | |
130 | ||
131 | switch (cmd) { | |
132 | ||
133 | case 0: | |
134 | /* This is just for testing!!! */ | |
135 | dprintk(1, KERN_INFO "bt856: init\n"); | |
136 | bt856_write(client, 0xdc, 0x18); | |
137 | bt856_write(client, 0xda, 0); | |
138 | bt856_write(client, 0xde, 0); | |
139 | ||
140 | bt856_setbit(client, 0xdc, 3, 1); | |
141 | //bt856_setbit(client, 0xdc, 6, 0); | |
142 | bt856_setbit(client, 0xdc, 4, 1); | |
143 | ||
144 | switch (encoder->norm) { | |
145 | ||
146 | case VIDEO_MODE_NTSC: | |
147 | bt856_setbit(client, 0xdc, 2, 0); | |
148 | break; | |
149 | ||
150 | case VIDEO_MODE_PAL: | |
151 | bt856_setbit(client, 0xdc, 2, 1); | |
152 | break; | |
153 | } | |
154 | ||
155 | bt856_setbit(client, 0xdc, 1, 1); | |
156 | bt856_setbit(client, 0xde, 4, 0); | |
157 | bt856_setbit(client, 0xde, 3, 1); | |
158 | if (debug != 0) | |
159 | bt856_dump(client); | |
160 | break; | |
161 | ||
162 | case ENCODER_GET_CAPABILITIES: | |
163 | { | |
164 | struct video_encoder_capability *cap = arg; | |
165 | ||
166 | dprintk(1, KERN_INFO "%s: get capabilities\n", | |
167 | I2C_NAME(client)); | |
168 | ||
169 | cap->flags = VIDEO_ENCODER_PAL | | |
170 | VIDEO_ENCODER_NTSC | | |
171 | VIDEO_ENCODER_CCIR; | |
172 | cap->inputs = 2; | |
173 | cap->outputs = 1; | |
174 | } | |
175 | break; | |
176 | ||
177 | case ENCODER_SET_NORM: | |
178 | { | |
179 | int *iarg = arg; | |
180 | ||
181 | dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client), | |
182 | *iarg); | |
183 | ||
184 | switch (*iarg) { | |
185 | ||
186 | case VIDEO_MODE_NTSC: | |
187 | bt856_setbit(client, 0xdc, 2, 0); | |
188 | break; | |
189 | ||
190 | case VIDEO_MODE_PAL: | |
191 | bt856_setbit(client, 0xdc, 2, 1); | |
192 | bt856_setbit(client, 0xda, 0, 0); | |
193 | //bt856_setbit(client, 0xda, 0, 1); | |
194 | break; | |
195 | ||
196 | default: | |
197 | return -EINVAL; | |
198 | ||
199 | } | |
200 | encoder->norm = *iarg; | |
201 | if (debug != 0) | |
202 | bt856_dump(client); | |
203 | } | |
204 | break; | |
205 | ||
206 | case ENCODER_SET_INPUT: | |
207 | { | |
208 | int *iarg = arg; | |
209 | ||
210 | dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client), | |
211 | *iarg); | |
212 | ||
213 | /* We only have video bus. | |
214 | * iarg = 0: input is from bt819 | |
215 | * iarg = 1: input is from ZR36060 */ | |
216 | ||
217 | switch (*iarg) { | |
218 | ||
219 | case 0: | |
220 | bt856_setbit(client, 0xde, 4, 0); | |
221 | bt856_setbit(client, 0xde, 3, 1); | |
222 | bt856_setbit(client, 0xdc, 3, 1); | |
223 | bt856_setbit(client, 0xdc, 6, 0); | |
224 | break; | |
225 | case 1: | |
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, 1); | |
230 | break; | |
231 | case 2: // Color bar | |
232 | bt856_setbit(client, 0xdc, 3, 0); | |
233 | bt856_setbit(client, 0xde, 4, 1); | |
234 | break; | |
235 | default: | |
236 | return -EINVAL; | |
237 | ||
238 | } | |
239 | ||
240 | if (debug != 0) | |
241 | bt856_dump(client); | |
242 | } | |
243 | break; | |
244 | ||
245 | case ENCODER_SET_OUTPUT: | |
246 | { | |
247 | int *iarg = arg; | |
248 | ||
249 | dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client), | |
250 | *iarg); | |
251 | ||
252 | /* not much choice of outputs */ | |
253 | if (*iarg != 0) { | |
254 | return -EINVAL; | |
255 | } | |
256 | } | |
257 | break; | |
258 | ||
259 | case ENCODER_ENABLE_OUTPUT: | |
260 | { | |
261 | int *iarg = arg; | |
262 | ||
263 | encoder->enable = !!*iarg; | |
264 | ||
265 | dprintk(1, KERN_INFO "%s: enable output %d\n", | |
266 | I2C_NAME(client), encoder->enable); | |
267 | } | |
268 | break; | |
269 | ||
270 | default: | |
271 | return -EINVAL; | |
272 | } | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
277 | /* ----------------------------------------------------------------------- */ | |
278 | ||
279 | /* | |
280 | * Generic i2c probe | |
281 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
282 | */ | |
283 | static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END }; | |
1da177e4 | 284 | |
68cc9d0b | 285 | static unsigned short ignore = I2C_CLIENT_END; |
d56410e0 | 286 | |
1da177e4 LT |
287 | static struct i2c_client_address_data addr_data = { |
288 | .normal_i2c = normal_i2c, | |
68cc9d0b JD |
289 | .probe = &ignore, |
290 | .ignore = &ignore, | |
1da177e4 LT |
291 | }; |
292 | ||
293 | static struct i2c_driver i2c_driver_bt856; | |
294 | ||
295 | static int | |
296 | bt856_detect_client (struct i2c_adapter *adapter, | |
297 | int address, | |
298 | int kind) | |
299 | { | |
300 | int i; | |
301 | struct i2c_client *client; | |
302 | struct bt856 *encoder; | |
303 | ||
304 | dprintk(1, | |
305 | KERN_INFO | |
306 | "bt856.c: detecting bt856 client on address 0x%x\n", | |
307 | address << 1); | |
308 | ||
309 | /* Check if the adapter supports the needed features */ | |
310 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
311 | return 0; | |
312 | ||
7408187d | 313 | client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); |
5fa1247a | 314 | if (!client) |
1da177e4 | 315 | return -ENOMEM; |
1da177e4 LT |
316 | client->addr = address; |
317 | client->adapter = adapter; | |
318 | client->driver = &i2c_driver_bt856; | |
1da177e4 LT |
319 | strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client))); |
320 | ||
7408187d | 321 | encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL); |
1da177e4 LT |
322 | if (encoder == NULL) { |
323 | kfree(client); | |
324 | return -ENOMEM; | |
325 | } | |
1da177e4 LT |
326 | encoder->norm = VIDEO_MODE_NTSC; |
327 | encoder->enable = 1; | |
328 | i2c_set_clientdata(client, encoder); | |
329 | ||
330 | i = i2c_attach_client(client); | |
331 | if (i) { | |
332 | kfree(client); | |
333 | kfree(encoder); | |
334 | return i; | |
335 | } | |
336 | ||
337 | bt856_write(client, 0xdc, 0x18); | |
338 | bt856_write(client, 0xda, 0); | |
339 | bt856_write(client, 0xde, 0); | |
340 | ||
341 | bt856_setbit(client, 0xdc, 3, 1); | |
342 | //bt856_setbit(client, 0xdc, 6, 0); | |
343 | bt856_setbit(client, 0xdc, 4, 1); | |
344 | ||
345 | switch (encoder->norm) { | |
346 | ||
347 | case VIDEO_MODE_NTSC: | |
348 | bt856_setbit(client, 0xdc, 2, 0); | |
349 | break; | |
350 | ||
351 | case VIDEO_MODE_PAL: | |
352 | bt856_setbit(client, 0xdc, 2, 1); | |
353 | break; | |
354 | } | |
355 | ||
356 | bt856_setbit(client, 0xdc, 1, 1); | |
357 | bt856_setbit(client, 0xde, 4, 0); | |
358 | bt856_setbit(client, 0xde, 3, 1); | |
359 | ||
360 | if (debug != 0) | |
361 | bt856_dump(client); | |
362 | ||
363 | dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client), | |
364 | client->addr << 1); | |
365 | ||
366 | return 0; | |
367 | } | |
368 | ||
369 | static int | |
370 | bt856_attach_adapter (struct i2c_adapter *adapter) | |
371 | { | |
372 | dprintk(1, | |
373 | KERN_INFO | |
374 | "bt856.c: starting probe for adapter %s (0x%x)\n", | |
375 | I2C_NAME(adapter), adapter->id); | |
376 | return i2c_probe(adapter, &addr_data, &bt856_detect_client); | |
377 | } | |
378 | ||
379 | static int | |
380 | bt856_detach_client (struct i2c_client *client) | |
381 | { | |
382 | struct bt856 *encoder = i2c_get_clientdata(client); | |
383 | int err; | |
384 | ||
385 | err = i2c_detach_client(client); | |
386 | if (err) { | |
387 | return err; | |
388 | } | |
389 | ||
390 | kfree(encoder); | |
391 | kfree(client); | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | /* ----------------------------------------------------------------------- */ | |
397 | ||
398 | static struct i2c_driver i2c_driver_bt856 = { | |
604f28e2 | 399 | .driver = { |
604f28e2 LR |
400 | .name = "bt856", |
401 | }, | |
1da177e4 LT |
402 | |
403 | .id = I2C_DRIVERID_BT856, | |
1da177e4 LT |
404 | |
405 | .attach_adapter = bt856_attach_adapter, | |
406 | .detach_client = bt856_detach_client, | |
407 | .command = bt856_command, | |
408 | }; | |
409 | ||
410 | static int __init | |
411 | bt856_init (void) | |
412 | { | |
413 | return i2c_add_driver(&i2c_driver_bt856); | |
414 | } | |
415 | ||
416 | static void __exit | |
417 | bt856_exit (void) | |
418 | { | |
419 | i2c_del_driver(&i2c_driver_bt856); | |
420 | } | |
421 | ||
422 | module_init(bt856_init); | |
423 | module_exit(bt856_exit); |