1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * saa7110 - Philips SAA7110(A) video decoder driver
4 *
5 * Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
6 *
7 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
8 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
9 * - some corrections for Pinnacle Systems Inc. DC10plus card.
10 *
11 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
12 * - moved over to linux>=2.4.x i2c protocol (1/1/2003)
13 */
14
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/types.h>
18 #include <linux/delay.h>
19 #include <linux/slab.h>
20 #include <linux/wait.h>
21 #include <linux/uaccess.h>
22 #include <linux/i2c.h>
23 #include <linux/videodev2.h>
24 #include <media/v4l2-device.h>
25 #include <media/v4l2-ctrls.h>
26
27 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
28 MODULE_AUTHOR("Pauline Middelink");
29 MODULE_LICENSE("GPL");
30
31
32 static int debug;
33 module_param(debug, int, 0);
34 MODULE_PARM_DESC(debug, "Debug level (0-1)");
35
36 #define SAA7110_MAX_INPUT 9 /* 6 CVBS, 3 SVHS */
37 #define SAA7110_MAX_OUTPUT 1 /* 1 YUV */
38
39 #define SAA7110_NR_REG 0x35
40
41 struct saa7110 {
42 struct v4l2_subdev sd;
43 struct v4l2_ctrl_handler hdl;
44 u8 reg[SAA7110_NR_REG];
45
46 v4l2_std_id norm;
47 int input;
48 int enable;
49
50 wait_queue_head_t wq;
51 };
52
to_saa7110(struct v4l2_subdev * sd)53 static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
54 {
55 return container_of(sd, struct saa7110, sd);
56 }
57
to_sd(struct v4l2_ctrl * ctrl)58 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
59 {
60 return &container_of(ctrl->handler, struct saa7110, hdl)->sd;
61 }
62
63 /* ----------------------------------------------------------------------- */
64 /* I2C support functions */
65 /* ----------------------------------------------------------------------- */
66
saa7110_write(struct v4l2_subdev * sd,u8 reg,u8 value)67 static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
68 {
69 struct i2c_client *client = v4l2_get_subdevdata(sd);
70 struct saa7110 *decoder = to_saa7110(sd);
71
72 decoder->reg[reg] = value;
73 return i2c_smbus_write_byte_data(client, reg, value);
74 }
75
saa7110_write_block(struct v4l2_subdev * sd,const u8 * data,unsigned int len)76 static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
77 {
78 struct i2c_client *client = v4l2_get_subdevdata(sd);
79 struct saa7110 *decoder = to_saa7110(sd);
80 int ret = -1;
81 u8 reg = *data; /* first register to write to */
82
83 /* Sanity check */
84 if (reg + (len - 1) > SAA7110_NR_REG)
85 return ret;
86
87 /* the saa7110 has an autoincrement function, use it if
88 * the adapter understands raw I2C */
89 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
90 ret = i2c_master_send(client, data, len);
91
92 /* Cache the written data */
93 memcpy(decoder->reg + reg, data + 1, len - 1);
94 } else {
95 for (++data, --len; len; len--) {
96 ret = saa7110_write(sd, reg++, *data++);
97 if (ret < 0)
98 break;
99 }
100 }
101
102 return ret;
103 }
104
saa7110_read(struct v4l2_subdev * sd)105 static inline int saa7110_read(struct v4l2_subdev *sd)
106 {
107 struct i2c_client *client = v4l2_get_subdevdata(sd);
108
109 return i2c_smbus_read_byte(client);
110 }
111
112 /* ----------------------------------------------------------------------- */
113 /* SAA7110 functions */
114 /* ----------------------------------------------------------------------- */
115
116 #define FRESP_06H_COMPST 0x03 /*0x13*/
117 #define FRESP_06H_SVIDEO 0x83 /*0xC0*/
118
119
saa7110_selmux(struct v4l2_subdev * sd,int chan)120 static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
121 {
122 static const unsigned char modes[9][8] = {
123 /* mode 0 */
124 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
125 0x44, 0x75, 0x16},
126 /* mode 1 */
127 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
128 0x44, 0x75, 0x16},
129 /* mode 2 */
130 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
131 0x60, 0xB5, 0x05},
132 /* mode 3 */
133 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
134 0x60, 0xB5, 0x05},
135 /* mode 4 */
136 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
137 0x60, 0xB5, 0x03},
138 /* mode 5 */
139 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
140 0x60, 0xB5, 0x03},
141 /* mode 6 */
142 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
143 0x44, 0x75, 0x12},
144 /* mode 7 */
145 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
146 0x60, 0xB5, 0x14},
147 /* mode 8 */
148 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
149 0x44, 0x75, 0x21}
150 };
151 struct saa7110 *decoder = to_saa7110(sd);
152 const unsigned char *ptr = modes[chan];
153
154 saa7110_write(sd, 0x06, ptr[0]); /* Luminance control */
155 saa7110_write(sd, 0x20, ptr[1]); /* Analog Control #1 */
156 saa7110_write(sd, 0x21, ptr[2]); /* Analog Control #2 */
157 saa7110_write(sd, 0x22, ptr[3]); /* Mixer Control #1 */
158 saa7110_write(sd, 0x2C, ptr[4]); /* Mixer Control #2 */
159 saa7110_write(sd, 0x30, ptr[5]); /* ADCs gain control */
160 saa7110_write(sd, 0x31, ptr[6]); /* Mixer Control #3 */
161 saa7110_write(sd, 0x21, ptr[7]); /* Analog Control #2 */
162 decoder->input = chan;
163
164 return 0;
165 }
166
167 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
168 0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
169 /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
170 /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
171 /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
172 /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
173 /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
174 /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
175 };
176
determine_norm(struct v4l2_subdev * sd)177 static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
178 {
179 DEFINE_WAIT(wait);
180 struct saa7110 *decoder = to_saa7110(sd);
181 int status;
182
183 /* mode changed, start automatic detection */
184 saa7110_write_block(sd, initseq, sizeof(initseq));
185 saa7110_selmux(sd, decoder->input);
186 prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
187 schedule_timeout(msecs_to_jiffies(250));
188 finish_wait(&decoder->wq, &wait);
189 status = saa7110_read(sd);
190 if (status & 0x40) {
191 v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
192 return V4L2_STD_UNKNOWN;
193 }
194 if ((status & 3) == 0) {
195 saa7110_write(sd, 0x06, 0x83);
196 if (status & 0x20) {
197 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
198 /*saa7110_write(sd,0x2E,0x81);*/
199 return V4L2_STD_NTSC;
200 }
201 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
202 /*saa7110_write(sd,0x2E,0x9A);*/
203 return V4L2_STD_PAL;
204 }
205 /*saa7110_write(sd,0x06,0x03);*/
206 if (status & 0x20) { /* 60Hz */
207 v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
208 saa7110_write(sd, 0x0D, 0x86);
209 saa7110_write(sd, 0x0F, 0x50);
210 saa7110_write(sd, 0x11, 0x2C);
211 /*saa7110_write(sd,0x2E,0x81);*/
212 return V4L2_STD_NTSC;
213 }
214
215 /* 50Hz -> PAL/SECAM */
216 saa7110_write(sd, 0x0D, 0x86);
217 saa7110_write(sd, 0x0F, 0x10);
218 saa7110_write(sd, 0x11, 0x59);
219 /*saa7110_write(sd,0x2E,0x9A);*/
220
221 prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
222 schedule_timeout(msecs_to_jiffies(250));
223 finish_wait(&decoder->wq, &wait);
224
225 status = saa7110_read(sd);
226 if ((status & 0x03) == 0x01) {
227 v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
228 saa7110_write(sd, 0x0D, 0x87);
229 return V4L2_STD_SECAM;
230 }
231 v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
232 return V4L2_STD_PAL;
233 }
234
saa7110_g_input_status(struct v4l2_subdev * sd,u32 * pstatus)235 static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
236 {
237 struct saa7110 *decoder = to_saa7110(sd);
238 int res = V4L2_IN_ST_NO_SIGNAL;
239 int status = saa7110_read(sd);
240
241 v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
242 status, (unsigned long long)decoder->norm);
243 if (!(status & 0x40))
244 res = 0;
245 if (!(status & 0x03))
246 res |= V4L2_IN_ST_NO_COLOR;
247
248 *pstatus = res;
249 return 0;
250 }
251
saa7110_querystd(struct v4l2_subdev * sd,v4l2_std_id * std)252 static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
253 {
254 *std &= determine_norm(sd);
255 return 0;
256 }
257
saa7110_s_std(struct v4l2_subdev * sd,v4l2_std_id std)258 static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
259 {
260 struct saa7110 *decoder = to_saa7110(sd);
261
262 if (decoder->norm != std) {
263 decoder->norm = std;
264 /*saa7110_write(sd, 0x06, 0x03);*/
265 if (std & V4L2_STD_NTSC) {
266 saa7110_write(sd, 0x0D, 0x86);
267 saa7110_write(sd, 0x0F, 0x50);
268 saa7110_write(sd, 0x11, 0x2C);
269 /*saa7110_write(sd, 0x2E, 0x81);*/
270 v4l2_dbg(1, debug, sd, "switched to NTSC\n");
271 } else if (std & V4L2_STD_PAL) {
272 saa7110_write(sd, 0x0D, 0x86);
273 saa7110_write(sd, 0x0F, 0x10);
274 saa7110_write(sd, 0x11, 0x59);
275 /*saa7110_write(sd, 0x2E, 0x9A);*/
276 v4l2_dbg(1, debug, sd, "switched to PAL\n");
277 } else if (std & V4L2_STD_SECAM) {
278 saa7110_write(sd, 0x0D, 0x87);
279 saa7110_write(sd, 0x0F, 0x10);
280 saa7110_write(sd, 0x11, 0x59);
281 /*saa7110_write(sd, 0x2E, 0x9A);*/
282 v4l2_dbg(1, debug, sd, "switched to SECAM\n");
283 } else {
284 return -EINVAL;
285 }
286 }
287 return 0;
288 }
289
saa7110_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)290 static int saa7110_s_routing(struct v4l2_subdev *sd,
291 u32 input, u32 output, u32 config)
292 {
293 struct saa7110 *decoder = to_saa7110(sd);
294
295 if (input >= SAA7110_MAX_INPUT) {
296 v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
297 return -EINVAL;
298 }
299 if (decoder->input != input) {
300 saa7110_selmux(sd, input);
301 v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
302 }
303 return 0;
304 }
305
saa7110_s_stream(struct v4l2_subdev * sd,int enable)306 static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
307 {
308 struct saa7110 *decoder = to_saa7110(sd);
309
310 if (decoder->enable != enable) {
311 decoder->enable = enable;
312 saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
313 v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
314 }
315 return 0;
316 }
317
saa7110_s_ctrl(struct v4l2_ctrl * ctrl)318 static int saa7110_s_ctrl(struct v4l2_ctrl *ctrl)
319 {
320 struct v4l2_subdev *sd = to_sd(ctrl);
321
322 switch (ctrl->id) {
323 case V4L2_CID_BRIGHTNESS:
324 saa7110_write(sd, 0x19, ctrl->val);
325 break;
326 case V4L2_CID_CONTRAST:
327 saa7110_write(sd, 0x13, ctrl->val);
328 break;
329 case V4L2_CID_SATURATION:
330 saa7110_write(sd, 0x12, ctrl->val);
331 break;
332 case V4L2_CID_HUE:
333 saa7110_write(sd, 0x07, ctrl->val);
334 break;
335 default:
336 return -EINVAL;
337 }
338 return 0;
339 }
340
341 /* ----------------------------------------------------------------------- */
342
343 static const struct v4l2_ctrl_ops saa7110_ctrl_ops = {
344 .s_ctrl = saa7110_s_ctrl,
345 };
346
347 static const struct v4l2_subdev_video_ops saa7110_video_ops = {
348 .s_std = saa7110_s_std,
349 .s_routing = saa7110_s_routing,
350 .s_stream = saa7110_s_stream,
351 .querystd = saa7110_querystd,
352 .g_input_status = saa7110_g_input_status,
353 };
354
355 static const struct v4l2_subdev_ops saa7110_ops = {
356 .video = &saa7110_video_ops,
357 };
358
359 /* ----------------------------------------------------------------------- */
360
saa7110_probe(struct i2c_client * client,const struct i2c_device_id * id)361 static int saa7110_probe(struct i2c_client *client,
362 const struct i2c_device_id *id)
363 {
364 struct saa7110 *decoder;
365 struct v4l2_subdev *sd;
366 int rv;
367
368 /* Check if the adapter supports the needed features */
369 if (!i2c_check_functionality(client->adapter,
370 I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
371 return -ENODEV;
372
373 v4l_info(client, "chip found @ 0x%x (%s)\n",
374 client->addr << 1, client->adapter->name);
375
376 decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
377 if (!decoder)
378 return -ENOMEM;
379 sd = &decoder->sd;
380 v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
381 decoder->norm = V4L2_STD_PAL;
382 decoder->input = 0;
383 decoder->enable = 1;
384 v4l2_ctrl_handler_init(&decoder->hdl, 2);
385 v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
386 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
387 v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
388 V4L2_CID_CONTRAST, 0, 127, 1, 64);
389 v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
390 V4L2_CID_SATURATION, 0, 127, 1, 64);
391 v4l2_ctrl_new_std(&decoder->hdl, &saa7110_ctrl_ops,
392 V4L2_CID_HUE, -128, 127, 1, 0);
393 sd->ctrl_handler = &decoder->hdl;
394 if (decoder->hdl.error) {
395 int err = decoder->hdl.error;
396
397 v4l2_ctrl_handler_free(&decoder->hdl);
398 return err;
399 }
400 v4l2_ctrl_handler_setup(&decoder->hdl);
401
402 init_waitqueue_head(&decoder->wq);
403
404 rv = saa7110_write_block(sd, initseq, sizeof(initseq));
405 if (rv < 0) {
406 v4l2_dbg(1, debug, sd, "init status %d\n", rv);
407 } else {
408 int ver, status;
409 saa7110_write(sd, 0x21, 0x10);
410 saa7110_write(sd, 0x0e, 0x18);
411 saa7110_write(sd, 0x0D, 0x04);
412 ver = saa7110_read(sd);
413 saa7110_write(sd, 0x0D, 0x06);
414 /*mdelay(150);*/
415 status = saa7110_read(sd);
416 v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
417 ver, status);
418 saa7110_write(sd, 0x0D, 0x86);
419 saa7110_write(sd, 0x0F, 0x10);
420 saa7110_write(sd, 0x11, 0x59);
421 /*saa7110_write(sd, 0x2E, 0x9A);*/
422 }
423
424 /*saa7110_selmux(sd,0);*/
425 /*determine_norm(sd);*/
426 /* setup and implicit mode 0 select has been performed */
427
428 return 0;
429 }
430
saa7110_remove(struct i2c_client * client)431 static int saa7110_remove(struct i2c_client *client)
432 {
433 struct v4l2_subdev *sd = i2c_get_clientdata(client);
434 struct saa7110 *decoder = to_saa7110(sd);
435
436 v4l2_device_unregister_subdev(sd);
437 v4l2_ctrl_handler_free(&decoder->hdl);
438 return 0;
439 }
440
441 /* ----------------------------------------------------------------------- */
442
443 static const struct i2c_device_id saa7110_id[] = {
444 { "saa7110", 0 },
445 { }
446 };
447 MODULE_DEVICE_TABLE(i2c, saa7110_id);
448
449 static struct i2c_driver saa7110_driver = {
450 .driver = {
451 .name = "saa7110",
452 },
453 .probe = saa7110_probe,
454 .remove = saa7110_remove,
455 .id_table = saa7110_id,
456 };
457
458 module_i2c_driver(saa7110_driver);
459
