Merge git://git.kernel.org/pub/scm/linux/kernel/git/aia21/ntfs-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 <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
34 #define I2C_NAME(x) (x)->name
35
36 #include <linux/videodev.h>
37 #include <linux/video_decoder.h>
38
39 #define I2C_VPX3220        0x86
40 #define VPX3220_DEBUG   KERN_DEBUG "vpx3220: "
41
42 static int debug = 0;
43 module_param(debug, int, 0);
44 MODULE_PARM_DESC(debug, "Debug level (0-1)");
45
46 #define dprintk(num, format, args...) \
47         do { \
48                 if (debug >= num) \
49                         printk(format, ##args); \
50         } while (0)
51
52 #define VPX_TIMEOUT_COUNT  10
53
54 /* ----------------------------------------------------------------------- */
55
56 struct vpx3220 {
57         unsigned char reg[255];
58
59         int norm;
60         int input;
61         int enable;
62         int bright;
63         int contrast;
64         int hue;
65         int sat;
66 };
67
68 static char *inputs[] = { "internal", "composite", "svideo" };
69
70 /* ----------------------------------------------------------------------- */
71 static inline int
72 vpx3220_write (struct i2c_client *client,
73                u8                 reg,
74                u8                 value)
75 {
76         struct vpx3220 *decoder = i2c_get_clientdata(client);
77
78         decoder->reg[reg] = value;
79         return i2c_smbus_write_byte_data(client, reg, value);
80 }
81
82 static inline int
83 vpx3220_read (struct i2c_client *client,
84               u8                 reg)
85 {
86         return i2c_smbus_read_byte_data(client, reg);
87 }
88
89 static int
90 vpx3220_fp_status (struct i2c_client *client)
91 {
92         unsigned char status;
93         unsigned int i;
94
95         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
96                 status = vpx3220_read(client, 0x29);
97
98                 if (!(status & 4))
99                         return 0;
100
101                 udelay(10);
102
103                 if (need_resched())
104                         cond_resched();
105         }
106
107         return -1;
108 }
109
110 static int
111 vpx3220_fp_write (struct i2c_client *client,
112                   u8                 fpaddr,
113                   u16                data)
114 {
115         /* Write the 16-bit address to the FPWR register */
116         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
117                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
118                 return -1;
119         }
120
121         if (vpx3220_fp_status(client) < 0)
122                 return -1;
123
124         /* Write the 16-bit data to the FPDAT register */
125         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
126                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
127                 return -1;
128         }
129
130         return 0;
131 }
132
133 static u16
134 vpx3220_fp_read (struct i2c_client *client,
135                  u16                fpaddr)
136 {
137         s16 data;
138
139         /* Write the 16-bit address to the FPRD register */
140         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
141                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
142                 return -1;
143         }
144
145         if (vpx3220_fp_status(client) < 0)
146                 return -1;
147
148         /* Read the 16-bit data from the FPDAT register */
149         data = i2c_smbus_read_word_data(client, 0x28);
150         if (data == -1) {
151                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
152                 return -1;
153         }
154
155         return swab16(data);
156 }
157
158 static int
159 vpx3220_write_block (struct i2c_client *client,
160                      const u8          *data,
161                      unsigned int       len)
162 {
163         u8 reg;
164         int ret = -1;
165
166         while (len >= 2) {
167                 reg = *data++;
168                 if ((ret =
169                      vpx3220_write(client, reg, *data++)) < 0)
170                         break;
171                 len -= 2;
172         }
173
174         return ret;
175 }
176
177 static int
178 vpx3220_write_fp_block (struct i2c_client *client,
179                         const u16         *data,
180                         unsigned int       len)
181 {
182         u8 reg;
183         int ret = 0;
184
185         while (len > 1) {
186                 reg = *data++;
187                 ret |= vpx3220_fp_write(client, reg, *data++);
188                 len -= 2;
189         }
190
191         return ret;
192 }
193
194 /* ---------------------------------------------------------------------- */
195
196 static const unsigned short init_ntsc[] = {
197         0x1c, 0x00,             /* NTSC tint angle */
198         0x88, 17,               /* Window 1 vertical */
199         0x89, 240,              /* Vertical lines in */
200         0x8a, 240,              /* Vertical lines out */
201         0x8b, 000,              /* Horizontal begin */
202         0x8c, 640,              /* Horizontal length */
203         0x8d, 640,              /* Number of pixels */
204         0x8f, 0xc00,            /* Disable window 2 */
205         0xf0, 0x73,             /* 13.5 MHz transport, Forced
206                                  * mode, latch windows */
207         0xf2, 0x13,             /* NTSC M, composite input */
208         0xe7, 0x1e1,            /* Enable vertical standard
209                                  * locking @ 240 lines */
210 };
211
212 static const unsigned short init_pal[] = {
213         0x88, 23,               /* Window 1 vertical begin */
214         0x89, 288,              /* Vertical lines in (16 lines
215                                  * skipped by the VFE) */
216         0x8a, 288,              /* Vertical lines out (16 lines
217                                  * skipped by the VFE) */
218         0x8b, 16,               /* Horizontal begin */
219         0x8c, 768,              /* Horizontal length */
220         0x8d, 784,              /* Number of pixels
221                                  * Must be >= Horizontal begin + Horizontal length */
222         0x8f, 0xc00,            /* Disable window 2 */
223         0xf0, 0x77,             /* 13.5 MHz transport, Forced
224                                  * mode, latch windows */
225         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
226         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
227 };
228
229 static const unsigned short init_secam[] = {
230         0x88, 23,               /* Window 1 vertical begin */
231         0x89, 288,              /* Vertical lines in (16 lines
232                                  * skipped by the VFE) */
233         0x8a, 288,              /* Vertical lines out (16 lines
234                                  * skipped by the VFE) */
235         0x8b, 16,               /* Horizontal begin */
236         0x8c, 768,              /* Horizontal length */
237         0x8d, 784,              /* Number of pixels
238                                  * Must be >= Horizontal begin + Horizontal length */
239         0x8f, 0xc00,            /* Disable window 2 */
240         0xf0, 0x77,             /* 13.5 MHz transport, Forced
241                                  * mode, latch windows */
242         0xf2, 0x3d5,            /* SECAM, composite input */
243         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
244 };
245
246 static const unsigned char init_common[] = {
247         0xf2, 0x00,             /* Disable all outputs */
248         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
249                                  * (clamp off) */
250         0xd8, 0xa8,             /* HREF/VREF active high, VREF
251                                  * pulse = 2, Odd/Even flag */
252         0x20, 0x03,             /* IF compensation 0dB/oct */
253         0xe0, 0xff,             /* Open up all comparators */
254         0xe1, 0x00,
255         0xe2, 0x7f,
256         0xe3, 0x80,
257         0xe4, 0x7f,
258         0xe5, 0x80,
259         0xe6, 0x00,             /* Brightness set to 0 */
260         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
261                                  * 10 to 8 2-bit error diffusion */
262         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
263                                  * ... (p.32) */
264         0xea, 0x18,             /* LLC2 connected, output FIFO
265                                  * reset with VACTintern */
266         0xf0, 0x8a,             /* Half full level to 10, bus
267                                  * shuffler [7:0, 23:16, 15:8] */
268         0xf1, 0x18,             /* Single clock, sync mode, no
269                                  * FE delay, no HLEN counter */
270         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
271                                  * strength to 2 */
272         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
273                                  * ALPHA strength to 4 */
274 };
275
276 static const unsigned short init_fp[] = {
277         0x59, 0,
278         0xa0, 2070,             /* ACC reference */
279         0xa3, 0,
280         0xa4, 0,
281         0xa8, 30,
282         0xb2, 768,
283         0xbe, 27,
284         0x58, 0,
285         0x26, 0,
286         0x4b, 0x298,            /* PLL gain */
287 };
288
289 static void
290 vpx3220_dump_i2c (struct i2c_client *client)
291 {
292         int len = sizeof(init_common);
293         const unsigned char *data = init_common;
294
295         while (len > 1) {
296                 dprintk(1,
297                         KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
298                         *data, vpx3220_read(client, *data));
299                 data += 2;
300                 len -= 2;
301         }
302 }
303
304 static int
305 vpx3220_command (struct i2c_client *client,
306                  unsigned int       cmd,
307                  void              *arg)
308 {
309         struct vpx3220 *decoder = i2c_get_clientdata(client);
310
311         switch (cmd) {
312         case 0:
313         {
314                 vpx3220_write_block(client, init_common,
315                                     sizeof(init_common));
316                 vpx3220_write_fp_block(client, init_fp,
317                                        sizeof(init_fp) >> 1);
318                 switch (decoder->norm) {
319                         
320                 case VIDEO_MODE_NTSC:
321                         vpx3220_write_fp_block(client, init_ntsc,
322                                                sizeof(init_ntsc) >> 1);
323                         break;
324
325                 case VIDEO_MODE_PAL:
326                         vpx3220_write_fp_block(client, init_pal,
327                                                sizeof(init_pal) >> 1);
328                         break;
329                 case VIDEO_MODE_SECAM:
330                         vpx3220_write_fp_block(client, init_secam,
331                                                sizeof(init_secam) >> 1);
332                         break;
333                 default:
334                         vpx3220_write_fp_block(client, init_pal,
335                                                sizeof(init_pal) >> 1);
336                         break;
337                 }
338         }               
339                 break;
340
341         case DECODER_DUMP:
342         {
343                 vpx3220_dump_i2c(client);
344         }
345                 break;
346
347         case DECODER_GET_CAPABILITIES:
348         {
349                 struct video_decoder_capability *cap = arg;
350
351                 dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
352                         I2C_NAME(client));
353
354                 cap->flags = VIDEO_DECODER_PAL |
355                              VIDEO_DECODER_NTSC |
356                              VIDEO_DECODER_SECAM |
357                              VIDEO_DECODER_AUTO |
358                              VIDEO_DECODER_CCIR;
359                 cap->inputs = 3;
360                 cap->outputs = 1;
361         }
362                 break;
363
364         case DECODER_GET_STATUS:
365         {
366                 int res = 0, status;
367
368                 dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
369                         I2C_NAME(client));
370
371                 status = vpx3220_fp_read(client, 0x0f3);
372
373                 dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
374                         status);
375
376                 if (status < 0)
377                         return status;
378
379                 if ((status & 0x20) == 0) {
380                         res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;
381
382                         switch (status & 0x18) {
383
384                         case 0x00:
385                         case 0x10:
386                         case 0x14:
387                         case 0x18:
388                                 res |= DECODER_STATUS_PAL;
389                                 break;
390
391                         case 0x08:
392                                 res |= DECODER_STATUS_SECAM;
393                                 break;
394
395                         case 0x04:
396                         case 0x0c:
397                         case 0x1c:
398                                 res |= DECODER_STATUS_NTSC;
399                                 break;
400                         }
401                 }
402
403                 *(int *) arg = res;
404         }
405                 break;
406
407         case DECODER_SET_NORM:
408         {
409                 int *iarg = arg, data;
410                 int temp_input;
411
412                 /* Here we back up the input selection because it gets
413                    overwritten when we fill the registers with the
414                    choosen video norm */
415                 temp_input = vpx3220_fp_read(client, 0xf2);
416
417                 dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
418                         I2C_NAME(client), *iarg);
419                 switch (*iarg) {
420
421                 case VIDEO_MODE_NTSC:
422                         vpx3220_write_fp_block(client, init_ntsc,
423                                                sizeof(init_ntsc) >> 1);
424                         dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
425                                 I2C_NAME(client));
426                         break;
427
428                 case VIDEO_MODE_PAL:
429                         vpx3220_write_fp_block(client, init_pal,
430                                                sizeof(init_pal) >> 1);
431                         dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
432                                 I2C_NAME(client));
433                         break;
434
435                 case VIDEO_MODE_SECAM:
436                         vpx3220_write_fp_block(client, init_secam,
437                                                sizeof(init_secam) >> 1);
438                         dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
439                                 I2C_NAME(client));
440                         break;
441
442                 case VIDEO_MODE_AUTO:
443                         /* FIXME This is only preliminary support */
444                         data = vpx3220_fp_read(client, 0xf2) & 0x20;
445                         vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
446                         dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
447                                 I2C_NAME(client));
448                         break;
449
450                 default:
451                         return -EINVAL;
452
453                 }
454                 decoder->norm = *iarg;
455
456                 /* And here we set the backed up video input again */
457                 vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
458                 udelay(10);
459         }
460                 break;
461
462         case DECODER_SET_INPUT:
463         {
464                 int *iarg = arg, data;
465
466                 /* RJ:  *iarg = 0: ST8 (PCTV) input
467                  *iarg = 1: COMPOSITE  input
468                  *iarg = 2: SVHS       input  */
469
470                 const int input[3][2] = {
471                         {0x0c, 0},
472                         {0x0d, 0},
473                         {0x0e, 1}
474                 };
475
476                 if (*iarg < 0 || *iarg > 2)
477                         return -EINVAL;
478
479                 dprintk(1, KERN_INFO "%s: input switched to %s\n",
480                         I2C_NAME(client), inputs[*iarg]);
481
482                 vpx3220_write(client, 0x33, input[*iarg][0]);
483
484                 data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
485                 if (data < 0)
486                         return data;
487                 /* 0x0010 is required to latch the setting */
488                 vpx3220_fp_write(client, 0xf2,
489                                  data | (input[*iarg][1] << 5) | 0x0010);
490
491                 udelay(10);
492         }
493                 break;
494
495         case DECODER_SET_OUTPUT:
496         {
497                 int *iarg = arg;
498
499                 /* not much choice of outputs */
500                 if (*iarg != 0) {
501                         return -EINVAL;
502                 }
503         }
504                 break;
505
506         case DECODER_ENABLE_OUTPUT:
507         {
508                 int *iarg = arg;
509
510                 dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
511                         I2C_NAME(client), *iarg);
512
513                 vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
514         }
515                 break;
516
517         case DECODER_SET_PICTURE:
518         {
519                 struct video_picture *pic = arg;
520
521                 if (decoder->bright != pic->brightness) {
522                         /* We want -128 to 128 we get 0-65535 */
523                         decoder->bright = pic->brightness;
524                         vpx3220_write(client, 0xe6,
525                                       (decoder->bright - 32768) >> 8);
526                 }
527                 if (decoder->contrast != pic->contrast) {
528                         /* We want 0 to 64 we get 0-65535 */
529                         /* Bit 7 and 8 is for noise shaping */
530                         decoder->contrast = pic->contrast;
531                         vpx3220_write(client, 0xe7,
532                                       (decoder->contrast >> 10) + 192);
533                 }
534                 if (decoder->sat != pic->colour) {
535                         /* We want 0 to 4096 we get 0-65535 */
536                         decoder->sat = pic->colour;
537                         vpx3220_fp_write(client, 0xa0,
538                                          decoder->sat >> 4);
539                 }
540                 if (decoder->hue != pic->hue) {
541                         /* We want -512 to 512 we get 0-65535 */
542                         decoder->hue = pic->hue;
543                         vpx3220_fp_write(client, 0x1c,
544                                          ((decoder->hue - 32768) >> 6) & 0xFFF);
545                 }
546         }
547                 break;
548
549         default:
550                 return -EINVAL;
551         }
552
553         return 0;
554 }
555
556 static int
557 vpx3220_init_client (struct i2c_client *client)
558 {
559         vpx3220_write_block(client, init_common, sizeof(init_common));
560         vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
561         /* Default to PAL */
562         vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
563
564         return 0;
565 }
566
567 /* -----------------------------------------------------------------------
568  * Client managment code
569  */
570
571 /*
572  * Generic i2c probe
573  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
574  */
575 static unsigned short normal_i2c[] =
576     { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
577         I2C_CLIENT_END
578 };
579
580 static unsigned short ignore = I2C_CLIENT_END;
581                                                                                 
582 static struct i2c_client_address_data addr_data = {
583         .normal_i2c             = normal_i2c,
584         .probe                  = &ignore,
585         .ignore                 = &ignore,
586 };
587
588 static struct i2c_driver vpx3220_i2c_driver;
589
590 static int
591 vpx3220_detach_client (struct i2c_client *client)
592 {
593         struct vpx3220 *decoder = i2c_get_clientdata(client);
594         int err;
595
596         err = i2c_detach_client(client);
597         if (err) {
598                 return err;
599         }
600
601         kfree(decoder);
602         kfree(client);
603
604         return 0;
605 }
606
607 static int
608 vpx3220_detect_client (struct i2c_adapter *adapter,
609                        int                 address,
610                        int                 kind)
611 {
612         int err;
613         struct i2c_client *client;
614         struct vpx3220 *decoder;
615
616         dprintk(1, VPX3220_DEBUG "%s\n", __func__);
617
618         /* Check if the adapter supports the needed features */
619         if (!i2c_check_functionality
620             (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
621                 return 0;
622
623         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
624         if (client == NULL) {
625                 return -ENOMEM;
626         }
627
628         client->addr = address;
629         client->adapter = adapter;
630         client->driver = &vpx3220_i2c_driver;
631
632         /* Check for manufacture ID and part number */
633         if (kind < 0) {
634                 u8 id;
635                 u16 pn;
636
637                 id = vpx3220_read(client, 0x00);
638                 if (id != 0xec) {
639                         dprintk(1,
640                                 KERN_INFO
641                                 "vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
642                                 id);
643                         kfree(client);
644                         return 0;
645                 }
646
647                 pn = (vpx3220_read(client, 0x02) << 8) +
648                     vpx3220_read(client, 0x01);
649                 switch (pn) {
650                 case 0x4680:
651                         strlcpy(I2C_NAME(client), "vpx3220a",
652                                 sizeof(I2C_NAME(client)));
653                         break;
654                 case 0x4260:
655                         strlcpy(I2C_NAME(client), "vpx3216b",
656                                 sizeof(I2C_NAME(client)));
657                         break;
658                 case 0x4280:
659                         strlcpy(I2C_NAME(client), "vpx3214c",
660                                 sizeof(I2C_NAME(client)));
661                         break;
662                 default:
663                         dprintk(1,
664                                 KERN_INFO 
665                                 "%s: Wrong part number (0x%04x)\n",
666                                 __func__, pn);
667                         kfree(client);
668                         return 0;
669                 }
670         } else {
671                 strlcpy(I2C_NAME(client), "forced vpx32xx",
672                         sizeof(I2C_NAME(client)));
673         }
674
675         decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
676         if (decoder == NULL) {
677                 kfree(client);
678                 return -ENOMEM;
679         }
680         decoder->norm = VIDEO_MODE_PAL;
681         decoder->input = 0;
682         decoder->enable = 1;
683         decoder->bright = 32768;
684         decoder->contrast = 32768;
685         decoder->hue = 32768;
686         decoder->sat = 32768;
687         i2c_set_clientdata(client, decoder);
688
689         err = i2c_attach_client(client);
690         if (err) {
691                 kfree(client);
692                 kfree(decoder);
693                 return err;
694         }
695
696         dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
697                 I2C_NAME(client), client->addr << 1);
698
699         vpx3220_init_client(client);
700
701         return 0;
702 }
703
704 static int
705 vpx3220_attach_adapter (struct i2c_adapter *adapter)
706 {
707         int ret;
708
709         ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
710         dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
711                 __func__, ret);
712         return ret;
713 }
714
715 /* -----------------------------------------------------------------------
716  * Driver initialization and cleanup code
717  */
718
719 static struct i2c_driver vpx3220_i2c_driver = {
720         .driver = {
721                 .name = "vpx3220",
722         },
723
724         .id = I2C_DRIVERID_VPX3220,
725
726         .attach_adapter = vpx3220_attach_adapter,
727         .detach_client = vpx3220_detach_client,
728         .command = vpx3220_command,
729 };
730
731 static int __init
732 vpx3220_init (void)
733 {
734         return i2c_add_driver(&vpx3220_i2c_driver);
735 }
736
737 static void __exit
738 vpx3220_cleanup (void)
739 {
740         i2c_del_driver(&vpx3220_i2c_driver);
741 }
742
743 module_init(vpx3220_init);
744 module_exit(vpx3220_cleanup);
745
746 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
747 MODULE_AUTHOR("Laurent Pinchart");
748 MODULE_LICENSE("GPL");