Automatic merge with /usr/src/ntfs-2.6.git.
[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 <linux/slab.h>
26
27 #include <linux/byteorder/swab.h>
28
29 #include <asm/io.h>
30 #include <asm/uaccess.h>
31
32 #include <linux/i2c.h>
33 #include <linux/i2c-dev.h>
34
35 #define I2C_NAME(x) (x)->name
36
37 #include <linux/videodev.h>
38 #include <linux/video_decoder.h>
39
40 #define I2C_VPX3220        0x86
41 #define VPX3220_DEBUG   KERN_DEBUG "vpx3220: "
42
43 static int debug = 0;
44 module_param(debug, int, 0);
45 MODULE_PARM_DESC(debug, "Debug level (0-1)");
46
47 #define dprintk(num, format, args...) \
48         do { \
49                 if (debug >= num) \
50                         printk(format, ##args); \
51         } while (0)
52
53 #define VPX_TIMEOUT_COUNT  10
54
55 /* ----------------------------------------------------------------------- */
56
57 struct vpx3220 {
58         unsigned char reg[255];
59
60         int norm;
61         int input;
62         int enable;
63         int bright;
64         int contrast;
65         int hue;
66         int sat;
67 };
68
69 static char *inputs[] = { "internal", "composite", "svideo" };
70
71 /* ----------------------------------------------------------------------- */
72 static inline int
73 vpx3220_write (struct i2c_client *client,
74                u8                 reg,
75                u8                 value)
76 {
77         struct vpx3220 *decoder = i2c_get_clientdata(client);
78
79         decoder->reg[reg] = value;
80         return i2c_smbus_write_byte_data(client, reg, value);
81 }
82
83 static inline int
84 vpx3220_read (struct i2c_client *client,
85               u8                 reg)
86 {
87         return i2c_smbus_read_byte_data(client, reg);
88 }
89
90 static int
91 vpx3220_fp_status (struct i2c_client *client)
92 {
93         unsigned char status;
94         unsigned int i;
95
96         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
97                 status = vpx3220_read(client, 0x29);
98
99                 if (!(status & 4))
100                         return 0;
101
102                 udelay(10);
103
104                 if (need_resched())
105                         cond_resched();
106         }
107
108         return -1;
109 }
110
111 static int
112 vpx3220_fp_write (struct i2c_client *client,
113                   u8                 fpaddr,
114                   u16                data)
115 {
116         /* Write the 16-bit address to the FPWR register */
117         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
118                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
119                 return -1;
120         }
121
122         if (vpx3220_fp_status(client) < 0)
123                 return -1;
124
125         /* Write the 16-bit data to the FPDAT register */
126         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
127                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
128                 return -1;
129         }
130
131         return 0;
132 }
133
134 static u16
135 vpx3220_fp_read (struct i2c_client *client,
136                  u16                fpaddr)
137 {
138         s16 data;
139
140         /* Write the 16-bit address to the FPRD register */
141         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
142                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
143                 return -1;
144         }
145
146         if (vpx3220_fp_status(client) < 0)
147                 return -1;
148
149         /* Read the 16-bit data from the FPDAT register */
150         data = i2c_smbus_read_word_data(client, 0x28);
151         if (data == -1) {
152                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
153                 return -1;
154         }
155
156         return swab16(data);
157 }
158
159 static int
160 vpx3220_write_block (struct i2c_client *client,
161                      const u8          *data,
162                      unsigned int       len)
163 {
164         u8 reg;
165         int ret = -1;
166
167         while (len >= 2) {
168                 reg = *data++;
169                 if ((ret =
170                      vpx3220_write(client, reg, *data++)) < 0)
171                         break;
172                 len -= 2;
173         }
174
175         return ret;
176 }
177
178 static int
179 vpx3220_write_fp_block (struct i2c_client *client,
180                         const u16         *data,
181                         unsigned int       len)
182 {
183         u8 reg;
184         int ret = 0;
185
186         while (len > 1) {
187                 reg = *data++;
188                 ret |= vpx3220_fp_write(client, reg, *data++);
189                 len -= 2;
190         }
191
192         return ret;
193 }
194
195 /* ---------------------------------------------------------------------- */
196
197 static const unsigned short init_ntsc[] = {
198         0x1c, 0x00,             /* NTSC tint angle */
199         0x88, 17,               /* Window 1 vertical */
200         0x89, 240,              /* Vertical lines in */
201         0x8a, 240,              /* Vertical lines out */
202         0x8b, 000,              /* Horizontal begin */
203         0x8c, 640,              /* Horizontal length */
204         0x8d, 640,              /* Number of pixels */
205         0x8f, 0xc00,            /* Disable window 2 */
206         0xf0, 0x173,            /* 13.5 MHz transport, Forced
207                                  * mode, latch windows */
208         0xf2, 0x13,             /* NTSC M, composite input */
209         0xe7, 0x1e1,            /* Enable vertical standard
210                                  * locking @ 240 lines */
211 };
212
213 static const unsigned short init_pal[] = {
214         0x88, 23,               /* Window 1 vertical begin */
215         0x89, 288 + 16,         /* Vertical lines in (16 lines
216                                  * skipped by the VFE) */
217         0x8a, 288 + 16,         /* Vertical lines out (16 lines
218                                  * skipped by the VFE) */
219         0x8b, 16,               /* Horizontal begin */
220         0x8c, 768,              /* Horizontal length */
221         0x8d, 784,              /* Number of pixels
222                                  * Must be >= Horizontal begin + Horizontal length */
223         0x8f, 0xc00,            /* Disable window 2 */
224         0xf0, 0x177,            /* 13.5 MHz transport, Forced
225                                  * mode, latch windows */
226         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
227         0xe7, 0x261,            /* PAL/SECAM set to 288 + 16 lines 
228                                  * change to 0x241 for 288 lines */
229 };
230
231 static const unsigned short init_secam[] = {
232         0x88, 23  - 16,         /* Window 1 vertical begin */
233         0x89, 288 + 16,         /* Vertical lines in (16 lines
234                                  * skipped by the VFE) */
235         0x8a, 288 + 16,         /* Vertical lines out (16 lines
236                                  * skipped by the VFE) */
237         0x8b, 16,               /* Horizontal begin */
238         0x8c, 768,              /* Horizontal length */
239         0x8d, 784,              /* Number of pixels
240                                  * Must be >= Horizontal begin + Horizontal length */
241         0x8f, 0xc00,            /* Disable window 2 */
242         0xf0, 0x177,            /* 13.5 MHz transport, Forced
243                                  * mode, latch windows */
244         0xf2, 0x3d5,            /* SECAM, composite input */
245         0xe7, 0x261,            /* PAL/SECAM set to 288 + 16 lines 
246                                  * change to 0x241 for 288 lines */
247 };
248
249 static const unsigned char init_common[] = {
250         0xf2, 0x00,             /* Disable all outputs */
251         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
252                                  * (clamp off) */
253         0xd8, 0xa8,             /* HREF/VREF active high, VREF
254                                  * pulse = 2, Odd/Even flag */
255         0x20, 0x03,             /* IF compensation 0dB/oct */
256         0xe0, 0xff,             /* Open up all comparators */
257         0xe1, 0x00,
258         0xe2, 0x7f,
259         0xe3, 0x80,
260         0xe4, 0x7f,
261         0xe5, 0x80,
262         0xe6, 0x00,             /* Brightness set to 0 */
263         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
264                                  * 10 to 8 2-bit error diffusion */
265         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
266                                  * ... (p.32) */
267         0xea, 0x18,             /* LLC2 connected, output FIFO
268                                  * reset with VACTintern */
269         0xf0, 0x8a,             /* Half full level to 10, bus
270                                  * shuffler [7:0, 23:16, 15:8] */
271         0xf1, 0x18,             /* Single clock, sync mode, no
272                                  * FE delay, no HLEN counter */
273         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
274                                  * strength to 2 */
275         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
276                                  * ALPHA strength to 4 */
277 };
278
279 static const unsigned short init_fp[] = {
280         0x59, 0,
281         0xa0, 2070,             /* ACC reference */
282         0xa3, 0,
283         0xa4, 0,
284         0xa8, 30,
285         0xb2, 768,
286         0xbe, 27,
287         0x58, 0,
288         0x26, 0,
289         0x4b, 0x298,            /* PLL gain */
290 };
291
292 static void
293 vpx3220_dump_i2c (struct i2c_client *client)
294 {
295         int len = sizeof(init_common);
296         const unsigned char *data = init_common;
297
298         while (len > 1) {
299                 dprintk(1,
300                         KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
301                         *data, vpx3220_read(client, *data));
302                 data += 2;
303                 len -= 2;
304         }
305 }
306
307 static int
308 vpx3220_command (struct i2c_client *client,
309                  unsigned int       cmd,
310                  void              *arg)
311 {
312         struct vpx3220 *decoder = i2c_get_clientdata(client);
313
314         switch (cmd) {
315         case 0:
316         {
317                 vpx3220_write_block(client, init_common,
318                                     sizeof(init_common));
319                 vpx3220_write_fp_block(client, init_fp,
320                                        sizeof(init_fp) >> 1);
321                 switch (decoder->norm) {
322                         
323                 case VIDEO_MODE_NTSC:
324                         vpx3220_write_fp_block(client, init_ntsc,
325                                                sizeof(init_ntsc) >> 1);
326                         break;
327
328                 case VIDEO_MODE_PAL:
329                         vpx3220_write_fp_block(client, init_pal,
330                                                sizeof(init_pal) >> 1);
331                         break;
332                 case VIDEO_MODE_SECAM:
333                         vpx3220_write_fp_block(client, init_secam,
334                                                sizeof(init_secam) >> 1);
335                         break;
336                 default:
337                         vpx3220_write_fp_block(client, init_pal,
338                                                sizeof(init_pal) >> 1);
339                         break;
340                 }
341         }               
342                 break;
343
344         case DECODER_DUMP:
345         {
346                 vpx3220_dump_i2c(client);
347         }
348                 break;
349
350         case DECODER_GET_CAPABILITIES:
351         {
352                 struct video_decoder_capability *cap = arg;
353
354                 dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
355                         I2C_NAME(client));
356
357                 cap->flags = VIDEO_DECODER_PAL |
358                              VIDEO_DECODER_NTSC |
359                              VIDEO_DECODER_SECAM |
360                              VIDEO_DECODER_AUTO |
361                              VIDEO_DECODER_CCIR;
362                 cap->inputs = 3;
363                 cap->outputs = 1;
364         }
365                 break;
366
367         case DECODER_GET_STATUS:
368         {
369                 int res = 0, status;
370
371                 dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
372                         I2C_NAME(client));
373
374                 status = vpx3220_fp_read(client, 0x0f3);
375
376                 dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
377                         status);
378
379                 if (status < 0)
380                         return status;
381
382                 if ((status & 0x20) == 0) {
383                         res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;
384
385                         switch (status & 0x18) {
386
387                         case 0x00:
388                         case 0x10:
389                         case 0x14:
390                         case 0x18:
391                                 res |= DECODER_STATUS_PAL;
392                                 break;
393
394                         case 0x08:
395                                 res |= DECODER_STATUS_SECAM;
396                                 break;
397
398                         case 0x04:
399                         case 0x0c:
400                         case 0x1c:
401                                 res |= DECODER_STATUS_NTSC;
402                                 break;
403                         }
404                 }
405
406                 *(int *) arg = res;
407         }
408                 break;
409
410         case DECODER_SET_NORM:
411         {
412                 int *iarg = arg, data;
413
414                 dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
415                         I2C_NAME(client), *iarg);
416                 switch (*iarg) {
417
418                 case VIDEO_MODE_NTSC:
419                         vpx3220_write_fp_block(client, init_ntsc,
420                                                sizeof(init_ntsc) >> 1);
421                         dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
422                                 I2C_NAME(client));
423                         break;
424
425                 case VIDEO_MODE_PAL:
426                         vpx3220_write_fp_block(client, init_pal,
427                                                sizeof(init_pal) >> 1);
428                         dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
429                                 I2C_NAME(client));
430                         break;
431
432                 case VIDEO_MODE_SECAM:
433                         vpx3220_write_fp_block(client, init_secam,
434                                                sizeof(init_secam) >> 1);
435                         dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
436                                 I2C_NAME(client));
437                         break;
438
439                 case VIDEO_MODE_AUTO:
440                         /* FIXME This is only preliminary support */
441                         data = vpx3220_fp_read(client, 0xf2) & 0x20;
442                         vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
443                         dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
444                                 I2C_NAME(client));
445                         break;
446
447                 default:
448                         return -EINVAL;
449
450                 }
451                 decoder->norm = *iarg;
452         }
453                 break;
454
455         case DECODER_SET_INPUT:
456         {
457                 int *iarg = arg, data;
458
459                 /* RJ:  *iarg = 0: ST8 (PCTV) input
460                  *iarg = 1: COMPOSITE  input
461                  *iarg = 2: SVHS       input  */
462
463                 const int input[3][2] = {
464                         {0x0c, 0},
465                         {0x0d, 0},
466                         {0x0e, 1}
467                 };
468
469                 if (*iarg < 0 || *iarg > 2)
470                         return -EINVAL;
471
472                 dprintk(1, KERN_INFO "%s: input switched to %s\n",
473                         I2C_NAME(client), inputs[*iarg]);
474
475                 vpx3220_write(client, 0x33, input[*iarg][0]);
476
477                 data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
478                 if (data < 0)
479                         return data;
480                 /* 0x0010 is required to latch the setting */
481                 vpx3220_fp_write(client, 0xf2,
482                                  data | (input[*iarg][1] << 5) | 0x0010);
483
484                 udelay(10);
485         }
486                 break;
487
488         case DECODER_SET_OUTPUT:
489         {
490                 int *iarg = arg;
491
492                 /* not much choice of outputs */
493                 if (*iarg != 0) {
494                         return -EINVAL;
495                 }
496         }
497                 break;
498
499         case DECODER_ENABLE_OUTPUT:
500         {
501                 int *iarg = arg;
502
503                 dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
504                         I2C_NAME(client), *iarg);
505
506                 vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
507         }
508                 break;
509
510         case DECODER_SET_PICTURE:
511         {
512                 struct video_picture *pic = arg;
513
514                 if (decoder->bright != pic->brightness) {
515                         /* We want -128 to 128 we get 0-65535 */
516                         decoder->bright = pic->brightness;
517                         vpx3220_write(client, 0xe6,
518                                       (decoder->bright - 32768) >> 8);
519                 }
520                 if (decoder->contrast != pic->contrast) {
521                         /* We want 0 to 64 we get 0-65535 */
522                         /* Bit 7 and 8 is for noise shaping */
523                         decoder->contrast = pic->contrast;
524                         vpx3220_write(client, 0xe7,
525                                       (decoder->contrast >> 10) + 192);
526                 }
527                 if (decoder->sat != pic->colour) {
528                         /* We want 0 to 4096 we get 0-65535 */
529                         decoder->sat = pic->colour;
530                         vpx3220_fp_write(client, 0xa0,
531                                          decoder->sat >> 4);
532                 }
533                 if (decoder->hue != pic->hue) {
534                         /* We want -512 to 512 we get 0-65535 */
535                         decoder->hue = pic->hue;
536                         vpx3220_fp_write(client, 0x1c,
537                                          ((decoder->hue - 32768) >> 6) & 0xFFF);
538                 }
539         }
540                 break;
541
542         default:
543                 return -EINVAL;
544         }
545
546         return 0;
547 }
548
549 static int
550 vpx3220_init_client (struct i2c_client *client)
551 {
552         vpx3220_write_block(client, init_common, sizeof(init_common));
553         vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
554         /* Default to PAL */
555         vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
556
557         return 0;
558 }
559
560 /* -----------------------------------------------------------------------
561  * Client managment code
562  */
563
564 /*
565  * Generic i2c probe
566  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
567  */
568 static unsigned short normal_i2c[] =
569     { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
570         I2C_CLIENT_END
571 };
572
573 static unsigned short ignore = I2C_CLIENT_END;
574                                                                                 
575 static struct i2c_client_address_data addr_data = {
576         .normal_i2c             = normal_i2c,
577         .probe                  = &ignore,
578         .ignore                 = &ignore,
579         .force                  = &ignore,
580 };
581
582 static struct i2c_driver vpx3220_i2c_driver;
583
584 static int
585 vpx3220_detach_client (struct i2c_client *client)
586 {
587         struct vpx3220 *decoder = i2c_get_clientdata(client);
588         int err;
589
590         err = i2c_detach_client(client);
591         if (err) {
592                 return err;
593         }
594
595         kfree(decoder);
596         kfree(client);
597
598         return 0;
599 }
600
601 static int
602 vpx3220_detect_client (struct i2c_adapter *adapter,
603                        int                 address,
604                        int                 kind)
605 {
606         int err;
607         struct i2c_client *client;
608         struct vpx3220 *decoder;
609
610         dprintk(1, VPX3220_DEBUG "%s\n", __func__);
611
612         /* Check if the adapter supports the needed features */
613         if (!i2c_check_functionality
614             (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
615                 return 0;
616
617         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
618         if (client == NULL) {
619                 return -ENOMEM;
620         }
621
622         memset(client, 0, sizeof(struct i2c_client));
623
624         client->addr = address;
625         client->adapter = adapter;
626         client->driver = &vpx3220_i2c_driver;
627         client->flags = I2C_CLIENT_ALLOW_USE;
628
629         /* Check for manufacture ID and part number */
630         if (kind < 0) {
631                 u8 id;
632                 u16 pn;
633
634                 id = vpx3220_read(client, 0x00);
635                 if (id != 0xec) {
636                         dprintk(1,
637                                 KERN_INFO
638                                 "vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
639                                 id);
640                         kfree(client);
641                         return 0;
642                 }
643
644                 pn = (vpx3220_read(client, 0x02) << 8) +
645                     vpx3220_read(client, 0x01);
646                 switch (pn) {
647                 case 0x4680:
648                         strlcpy(I2C_NAME(client), "vpx3220a",
649                                 sizeof(I2C_NAME(client)));
650                         break;
651                 case 0x4260:
652                         strlcpy(I2C_NAME(client), "vpx3216b",
653                                 sizeof(I2C_NAME(client)));
654                         break;
655                 case 0x4280:
656                         strlcpy(I2C_NAME(client), "vpx3214c",
657                                 sizeof(I2C_NAME(client)));
658                         break;
659                 default:
660                         dprintk(1,
661                                 KERN_INFO 
662                                 "%s: Wrong part number (0x%04x)\n",
663                                 __func__, pn);
664                         kfree(client);
665                         return 0;
666                 }
667         } else {
668                 strlcpy(I2C_NAME(client), "forced vpx32xx",
669                         sizeof(I2C_NAME(client)));
670         }
671
672         decoder = kmalloc(sizeof(struct vpx3220), GFP_KERNEL);
673         if (decoder == NULL) {
674                 kfree(client);
675                 return -ENOMEM;
676         }
677         memset(decoder, 0, sizeof(struct vpx3220));
678         decoder->norm = VIDEO_MODE_PAL;
679         decoder->input = 0;
680         decoder->enable = 1;
681         decoder->bright = 32768;
682         decoder->contrast = 32768;
683         decoder->hue = 32768;
684         decoder->sat = 32768;
685         i2c_set_clientdata(client, decoder);
686
687         err = i2c_attach_client(client);
688         if (err) {
689                 kfree(client);
690                 kfree(decoder);
691                 return err;
692         }
693
694         dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
695                 I2C_NAME(client), client->addr << 1);
696
697         vpx3220_init_client(client);
698
699         return 0;
700 }
701
702 static int
703 vpx3220_attach_adapter (struct i2c_adapter *adapter)
704 {
705         int ret;
706
707         ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
708         dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
709                 __func__, ret);
710         return ret;
711 }
712
713 /* -----------------------------------------------------------------------
714  * Driver initialization and cleanup code
715  */
716
717 static struct i2c_driver vpx3220_i2c_driver = {
718         .owner = THIS_MODULE,
719         .name = "vpx3220",
720
721         .id = I2C_DRIVERID_VPX3220,
722         .flags = I2C_DF_NOTIFY,
723
724         .attach_adapter = vpx3220_attach_adapter,
725         .detach_client = vpx3220_detach_client,
726         .command = vpx3220_command,
727 };
728
729 static int __init
730 vpx3220_init (void)
731 {
732         return i2c_add_driver(&vpx3220_i2c_driver);
733 }
734
735 static void __exit
736 vpx3220_cleanup (void)
737 {
738         i2c_del_driver(&vpx3220_i2c_driver);
739 }
740
741 module_init(vpx3220_init);
742 module_exit(vpx3220_cleanup);
743
744 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
745 MODULE_AUTHOR("Laurent Pinchart");
746 MODULE_LICENSE("GPL");