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