Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6
[linux-2.6] / drivers / media / video / vpx3220.c
1 /*
2  * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
3  *
4  * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  */
20
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
24 #include <linux/types.h>
25 #include <asm/uaccess.h>
26 #include <linux/i2c.h>
27 #include <linux/videodev2.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-chip-ident.h>
30 #include <media/v4l2-i2c-drv.h>
31
32 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
33 MODULE_AUTHOR("Laurent Pinchart");
34 MODULE_LICENSE("GPL");
35
36 static int debug;
37 module_param(debug, int, 0);
38 MODULE_PARM_DESC(debug, "Debug level (0-1)");
39
40
41 #define VPX_TIMEOUT_COUNT  10
42
43 /* ----------------------------------------------------------------------- */
44
45 struct vpx3220 {
46         struct v4l2_subdev sd;
47         unsigned char reg[255];
48
49         v4l2_std_id norm;
50         int ident;
51         int input;
52         int enable;
53         int bright;
54         int contrast;
55         int hue;
56         int sat;
57 };
58
59 static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)
60 {
61         return container_of(sd, struct vpx3220, sd);
62 }
63
64 static char *inputs[] = { "internal", "composite", "svideo" };
65
66 /* ----------------------------------------------------------------------- */
67
68 static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)
69 {
70         struct i2c_client *client = v4l2_get_subdevdata(sd);
71         struct vpx3220 *decoder = i2c_get_clientdata(client);
72
73         decoder->reg[reg] = value;
74         return i2c_smbus_write_byte_data(client, reg, value);
75 }
76
77 static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg)
78 {
79         struct i2c_client *client = v4l2_get_subdevdata(sd);
80
81         return i2c_smbus_read_byte_data(client, reg);
82 }
83
84 static int vpx3220_fp_status(struct v4l2_subdev *sd)
85 {
86         unsigned char status;
87         unsigned int i;
88
89         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
90                 status = vpx3220_read(sd, 0x29);
91
92                 if (!(status & 4))
93                         return 0;
94
95                 udelay(10);
96
97                 if (need_resched())
98                         cond_resched();
99         }
100
101         return -1;
102 }
103
104 static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)
105 {
106         struct i2c_client *client = v4l2_get_subdevdata(sd);
107
108         /* Write the 16-bit address to the FPWR register */
109         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
110                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
111                 return -1;
112         }
113
114         if (vpx3220_fp_status(sd) < 0)
115                 return -1;
116
117         /* Write the 16-bit data to the FPDAT register */
118         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
119                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
120                 return -1;
121         }
122
123         return 0;
124 }
125
126 static u16 vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)
127 {
128         struct i2c_client *client = v4l2_get_subdevdata(sd);
129         s16 data;
130
131         /* Write the 16-bit address to the FPRD register */
132         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
133                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
134                 return -1;
135         }
136
137         if (vpx3220_fp_status(sd) < 0)
138                 return -1;
139
140         /* Read the 16-bit data from the FPDAT register */
141         data = i2c_smbus_read_word_data(client, 0x28);
142         if (data == -1) {
143                 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
144                 return -1;
145         }
146
147         return swab16(data);
148 }
149
150 static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
151 {
152         u8 reg;
153         int ret = -1;
154
155         while (len >= 2) {
156                 reg = *data++;
157                 ret = vpx3220_write(sd, reg, *data++);
158                 if (ret < 0)
159                         break;
160                 len -= 2;
161         }
162
163         return ret;
164 }
165
166 static int vpx3220_write_fp_block(struct v4l2_subdev *sd,
167                 const u16 *data, unsigned int len)
168 {
169         u8 reg;
170         int ret = 0;
171
172         while (len > 1) {
173                 reg = *data++;
174                 ret |= vpx3220_fp_write(sd, reg, *data++);
175                 len -= 2;
176         }
177
178         return ret;
179 }
180
181 /* ---------------------------------------------------------------------- */
182
183 static const unsigned short init_ntsc[] = {
184         0x1c, 0x00,             /* NTSC tint angle */
185         0x88, 17,               /* Window 1 vertical */
186         0x89, 240,              /* Vertical lines in */
187         0x8a, 240,              /* Vertical lines out */
188         0x8b, 000,              /* Horizontal begin */
189         0x8c, 640,              /* Horizontal length */
190         0x8d, 640,              /* Number of pixels */
191         0x8f, 0xc00,            /* Disable window 2 */
192         0xf0, 0x73,             /* 13.5 MHz transport, Forced
193                                  * mode, latch windows */
194         0xf2, 0x13,             /* NTSC M, composite input */
195         0xe7, 0x1e1,            /* Enable vertical standard
196                                  * locking @ 240 lines */
197 };
198
199 static const unsigned short init_pal[] = {
200         0x88, 23,               /* Window 1 vertical begin */
201         0x89, 288,              /* Vertical lines in (16 lines
202                                  * skipped by the VFE) */
203         0x8a, 288,              /* Vertical lines out (16 lines
204                                  * skipped by the VFE) */
205         0x8b, 16,               /* Horizontal begin */
206         0x8c, 768,              /* Horizontal length */
207         0x8d, 784,              /* Number of pixels
208                                  * Must be >= Horizontal begin + Horizontal length */
209         0x8f, 0xc00,            /* Disable window 2 */
210         0xf0, 0x77,             /* 13.5 MHz transport, Forced
211                                  * mode, latch windows */
212         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
213         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
214 };
215
216 static const unsigned short init_secam[] = {
217         0x88, 23,               /* Window 1 vertical begin */
218         0x89, 288,              /* Vertical lines in (16 lines
219                                  * skipped by the VFE) */
220         0x8a, 288,              /* Vertical lines out (16 lines
221                                  * skipped by the VFE) */
222         0x8b, 16,               /* Horizontal begin */
223         0x8c, 768,              /* Horizontal length */
224         0x8d, 784,              /* Number of pixels
225                                  * Must be >= Horizontal begin + Horizontal length */
226         0x8f, 0xc00,            /* Disable window 2 */
227         0xf0, 0x77,             /* 13.5 MHz transport, Forced
228                                  * mode, latch windows */
229         0xf2, 0x3d5,            /* SECAM, composite input */
230         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
231 };
232
233 static const unsigned char init_common[] = {
234         0xf2, 0x00,             /* Disable all outputs */
235         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
236                                  * (clamp off) */
237         0xd8, 0xa8,             /* HREF/VREF active high, VREF
238                                  * pulse = 2, Odd/Even flag */
239         0x20, 0x03,             /* IF compensation 0dB/oct */
240         0xe0, 0xff,             /* Open up all comparators */
241         0xe1, 0x00,
242         0xe2, 0x7f,
243         0xe3, 0x80,
244         0xe4, 0x7f,
245         0xe5, 0x80,
246         0xe6, 0x00,             /* Brightness set to 0 */
247         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
248                                  * 10 to 8 2-bit error diffusion */
249         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
250                                  * ... (p.32) */
251         0xea, 0x18,             /* LLC2 connected, output FIFO
252                                  * reset with VACTintern */
253         0xf0, 0x8a,             /* Half full level to 10, bus
254                                  * shuffler [7:0, 23:16, 15:8] */
255         0xf1, 0x18,             /* Single clock, sync mode, no
256                                  * FE delay, no HLEN counter */
257         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
258                                  * strength to 2 */
259         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
260                                  * ALPHA strength to 4 */
261 };
262
263 static const unsigned short init_fp[] = {
264         0x59, 0,
265         0xa0, 2070,             /* ACC reference */
266         0xa3, 0,
267         0xa4, 0,
268         0xa8, 30,
269         0xb2, 768,
270         0xbe, 27,
271         0x58, 0,
272         0x26, 0,
273         0x4b, 0x298,            /* PLL gain */
274 };
275
276
277 static int vpx3220_init(struct v4l2_subdev *sd, u32 val)
278 {
279         struct vpx3220 *decoder = to_vpx3220(sd);
280
281         vpx3220_write_block(sd, init_common, sizeof(init_common));
282         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
283         if (decoder->norm & V4L2_STD_NTSC)
284                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
285         else if (decoder->norm & V4L2_STD_PAL)
286                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
287         else if (decoder->norm & V4L2_STD_SECAM)
288                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
289         else
290                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
291         return 0;
292 }
293
294 static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
295 {
296         int res = V4L2_IN_ST_NO_SIGNAL, status;
297         v4l2_std_id std = 0;
298
299         status = vpx3220_fp_read(sd, 0x0f3);
300
301         v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status);
302
303         if (status < 0)
304                 return status;
305
306         if ((status & 0x20) == 0) {
307                 res = 0;
308
309                 switch (status & 0x18) {
310                 case 0x00:
311                 case 0x10:
312                 case 0x14:
313                 case 0x18:
314                         std = V4L2_STD_PAL;
315                         break;
316
317                 case 0x08:
318                         std = V4L2_STD_SECAM;
319                         break;
320
321                 case 0x04:
322                 case 0x0c:
323                 case 0x1c:
324                         std = V4L2_STD_NTSC;
325                         break;
326                 }
327         }
328         if (pstd)
329                 *pstd = std;
330         if (pstatus)
331                 *pstatus = status;
332         return 0;
333 }
334
335 static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
336 {
337         v4l2_dbg(1, debug, sd, "querystd\n");
338         return vpx3220_status(sd, NULL, std);
339 }
340
341 static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status)
342 {
343         v4l2_dbg(1, debug, sd, "g_input_status\n");
344         return vpx3220_status(sd, status, NULL);
345 }
346
347 static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
348 {
349         struct vpx3220 *decoder = to_vpx3220(sd);
350         int temp_input;
351
352         /* Here we back up the input selection because it gets
353            overwritten when we fill the registers with the
354            choosen video norm */
355         temp_input = vpx3220_fp_read(sd, 0xf2);
356
357         v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std);
358         if (std & V4L2_STD_NTSC) {
359                 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
360                 v4l2_dbg(1, debug, sd, "norm switched to NTSC\n");
361         } else if (std & V4L2_STD_PAL) {
362                 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
363                 v4l2_dbg(1, debug, sd, "norm switched to PAL\n");
364         } else if (std & V4L2_STD_SECAM) {
365                 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
366                 v4l2_dbg(1, debug, sd, "norm switched to SECAM\n");
367         } else {
368                 return -EINVAL;
369         }
370
371         decoder->norm = std;
372
373         /* And here we set the backed up video input again */
374         vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010);
375         udelay(10);
376         return 0;
377 }
378
379 static int vpx3220_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
380 {
381         int data;
382
383         /* RJ:   route->input = 0: ST8 (PCTV) input
384                  route->input = 1: COMPOSITE  input
385                  route->input = 2: SVHS       input  */
386
387         const int input[3][2] = {
388                 {0x0c, 0},
389                 {0x0d, 0},
390                 {0x0e, 1}
391         };
392
393         if (route->input < 0 || route->input > 2)
394                 return -EINVAL;
395
396         v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[route->input]);
397
398         vpx3220_write(sd, 0x33, input[route->input][0]);
399
400         data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020);
401         if (data < 0)
402                 return data;
403         /* 0x0010 is required to latch the setting */
404         vpx3220_fp_write(sd, 0xf2,
405                         data | (input[route->input][1] << 5) | 0x0010);
406
407         udelay(10);
408         return 0;
409 }
410
411 static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable)
412 {
413         v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off");
414
415         vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00));
416         return 0;
417 }
418
419 static int vpx3220_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
420 {
421         switch (qc->id) {
422         case V4L2_CID_BRIGHTNESS:
423                 v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
424                 break;
425
426         case V4L2_CID_CONTRAST:
427                 v4l2_ctrl_query_fill(qc, 0, 63, 1, 32);
428                 break;
429
430         case V4L2_CID_SATURATION:
431                 v4l2_ctrl_query_fill(qc, 0, 4095, 1, 2048);
432                 break;
433
434         case V4L2_CID_HUE:
435                 v4l2_ctrl_query_fill(qc, -512, 511, 1, 0);
436                 break;
437
438         default:
439                 return -EINVAL;
440         }
441         return 0;
442 }
443
444 static int vpx3220_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
445 {
446         struct vpx3220 *decoder = to_vpx3220(sd);
447
448         switch (ctrl->id) {
449         case V4L2_CID_BRIGHTNESS:
450                 ctrl->value = decoder->bright;
451                 break;
452         case V4L2_CID_CONTRAST:
453                 ctrl->value = decoder->contrast;
454                 break;
455         case V4L2_CID_SATURATION:
456                 ctrl->value = decoder->sat;
457                 break;
458         case V4L2_CID_HUE:
459                 ctrl->value = decoder->hue;
460                 break;
461         default:
462                 return -EINVAL;
463         }
464         return 0;
465 }
466
467 static int vpx3220_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
468 {
469         struct vpx3220 *decoder = to_vpx3220(sd);
470
471         switch (ctrl->id) {
472         case V4L2_CID_BRIGHTNESS:
473                 if (decoder->bright != ctrl->value) {
474                         decoder->bright = ctrl->value;
475                         vpx3220_write(sd, 0xe6, decoder->bright);
476                 }
477                 break;
478         case V4L2_CID_CONTRAST:
479                 if (decoder->contrast != ctrl->value) {
480                         /* Bit 7 and 8 is for noise shaping */
481                         decoder->contrast = ctrl->value;
482                         vpx3220_write(sd, 0xe7, decoder->contrast + 192);
483                 }
484                 break;
485         case V4L2_CID_SATURATION:
486                 if (decoder->sat != ctrl->value) {
487                         decoder->sat = ctrl->value;
488                         vpx3220_fp_write(sd, 0xa0, decoder->sat);
489                 }
490                 break;
491         case V4L2_CID_HUE:
492                 if (decoder->hue != ctrl->value) {
493                         decoder->hue = ctrl->value;
494                         vpx3220_fp_write(sd, 0x1c, decoder->hue);
495                 }
496                 break;
497         default:
498                 return -EINVAL;
499         }
500         return 0;
501 }
502
503 static int vpx3220_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
504 {
505         struct vpx3220 *decoder = to_vpx3220(sd);
506         struct i2c_client *client = v4l2_get_subdevdata(sd);
507
508         return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
509 }
510
511 /* ----------------------------------------------------------------------- */
512
513 static const struct v4l2_subdev_core_ops vpx3220_core_ops = {
514         .g_chip_ident = vpx3220_g_chip_ident,
515         .init = vpx3220_init,
516         .g_ctrl = vpx3220_g_ctrl,
517         .s_ctrl = vpx3220_s_ctrl,
518         .queryctrl = vpx3220_queryctrl,
519 };
520
521 static const struct v4l2_subdev_tuner_ops vpx3220_tuner_ops = {
522         .s_std = vpx3220_s_std,
523 };
524
525 static const struct v4l2_subdev_video_ops vpx3220_video_ops = {
526         .s_routing = vpx3220_s_routing,
527         .s_stream = vpx3220_s_stream,
528         .querystd = vpx3220_querystd,
529         .g_input_status = vpx3220_g_input_status,
530 };
531
532 static const struct v4l2_subdev_ops vpx3220_ops = {
533         .core = &vpx3220_core_ops,
534         .tuner = &vpx3220_tuner_ops,
535         .video = &vpx3220_video_ops,
536 };
537
538 /* -----------------------------------------------------------------------
539  * Client management code
540  */
541
542 static int vpx3220_probe(struct i2c_client *client,
543                         const struct i2c_device_id *id)
544 {
545         struct vpx3220 *decoder;
546         struct v4l2_subdev *sd;
547         const char *name = NULL;
548         u8 ver;
549         u16 pn;
550
551         /* Check if the adapter supports the needed features */
552         if (!i2c_check_functionality(client->adapter,
553                 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
554                 return -ENODEV;
555
556         decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
557         if (decoder == NULL)
558                 return -ENOMEM;
559         sd = &decoder->sd;
560         v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);
561         decoder->norm = V4L2_STD_PAL;
562         decoder->input = 0;
563         decoder->enable = 1;
564         decoder->bright = 32768;
565         decoder->contrast = 32768;
566         decoder->hue = 32768;
567         decoder->sat = 32768;
568
569         ver = i2c_smbus_read_byte_data(client, 0x00);
570         pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
571                 i2c_smbus_read_byte_data(client, 0x01);
572         decoder->ident = V4L2_IDENT_VPX3220A;
573         if (ver == 0xec) {
574                 switch (pn) {
575                 case 0x4680:
576                         name = "vpx3220a";
577                         break;
578                 case 0x4260:
579                         name = "vpx3216b";
580                         decoder->ident = V4L2_IDENT_VPX3216B;
581                         break;
582                 case 0x4280:
583                         name = "vpx3214c";
584                         decoder->ident = V4L2_IDENT_VPX3214C;
585                         break;
586                 }
587         }
588         if (name)
589                 v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,
590                         client->addr << 1, client->adapter->name);
591         else
592                 v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",
593                         ver, pn, client->addr << 1, client->adapter->name);
594
595         vpx3220_write_block(sd, init_common, sizeof(init_common));
596         vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
597         /* Default to PAL */
598         vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
599         return 0;
600 }
601
602 static int vpx3220_remove(struct i2c_client *client)
603 {
604         struct v4l2_subdev *sd = i2c_get_clientdata(client);
605
606         v4l2_device_unregister_subdev(sd);
607         kfree(to_vpx3220(sd));
608         return 0;
609 }
610
611 static const struct i2c_device_id vpx3220_id[] = {
612         { "vpx3220a", 0 },
613         { "vpx3216b", 0 },
614         { "vpx3214c", 0 },
615         { }
616 };
617 MODULE_DEVICE_TABLE(i2c, vpx3220_id);
618
619 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
620         .name = "vpx3220",
621         .probe = vpx3220_probe,
622         .remove = vpx3220_remove,
623         .id_table = vpx3220_id,
624 };