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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / media / dvb / frontends / tda10023.c
blob364bc01971a0c7c4071ac98d0fd9f6e5e86fced8
1 /*
2 TDA10023 - DVB-C decoder
3 (as used in Philips CU1216-3 NIM and the Reelbox DVB-C tuner card)
4
5 Copyright (C) 2005 Georg Acher, BayCom GmbH (acher at baycom dot de)
6 Copyright (c) 2006 Hartmut Birr (e9hack at gmail dot com)
7
8 Remotely based on tda10021.c
9 Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
10 Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
11 Support for TDA10021
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
28 #include <linux/delay.h>
29 #include <linux/errno.h>
30 #include <linux/init.h>
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/string.h>
34 #include <linux/slab.h>
35
36 #include <asm/div64.h>
37
38 #include "dvb_frontend.h"
39 #include "tda1002x.h"
40
41
42 struct tda10023_state {
43 struct i2c_adapter* i2c;
44 /* configuration settings */
45 const struct tda1002x_config* config;
46 struct dvb_frontend frontend;
47
48 u8 pwm;
49 u8 reg0;
50 };
51
52
53 #define dprintk(x...)
54
55 static int verbose;
56
57 #define XTAL 28920000UL
58 #define PLL_M 8UL
59 #define PLL_P 4UL
60 #define PLL_N 1UL
61 #define SYSCLK (XTAL*PLL_M/(PLL_N*PLL_P)) // -> 57840000
62
63 static u8 tda10023_inittab[]={
64 // reg mask val
65 0x2a,0xff,0x02, // PLL3, Bypass, Power Down
66 0xff,0x64,0x00, // Sleep 100ms
67 0x2a,0xff,0x03, // PLL3, Bypass, Power Down
68 0xff,0x64,0x00, // Sleep 100ms
69 0x28,0xff,PLL_M-1, // PLL1 M=8
70 0x29,0xff,((PLL_P-1)<<6)|(PLL_N-1), // PLL2
71 0x00,0xff,0x23, // GPR FSAMPLING=1
72 0x2a,0xff,0x08, // PLL3 PSACLK=1
73 0xff,0x64,0x00, // Sleep 100ms
74 0x1f,0xff,0x00, // RESET
75 0xff,0x64,0x00, // Sleep 100ms
76 0xe6,0x0c,0x04, // RSCFG_IND
77 0x10,0xc0,0x80, // DECDVBCFG1 PBER=1
78
79 0x0e,0xff,0x82, // GAIN1
80 0x03,0x08,0x08, // CLKCONF DYN=1
81 0x2e,0xbf,0x30, // AGCCONF2 TRIAGC=0,POSAGC=ENAGCIF=1 PPWMTUN=0 PPWMIF=0
82 0x01,0xff,0x30, // AGCREF
83 0x1e,0x84,0x84, // CONTROL SACLK_ON=1
84 0x1b,0xff,0xc8, // ADC TWOS=1
85 0x3b,0xff,0xff, // IFMAX
86 0x3c,0xff,0x00, // IFMIN
87 0x34,0xff,0x00, // PWMREF
88 0x35,0xff,0xff, // TUNMAX
89 0x36,0xff,0x00, // TUNMIN
90 0x06,0xff,0x7f, // EQCONF1 POSI=7 ENADAPT=ENEQUAL=DFE=1 // 0x77
91 0x1c,0x30,0x30, // EQCONF2 STEPALGO=SGNALGO=1
92 0x37,0xff,0xf6, // DELTAF_LSB
93 0x38,0xff,0xff, // DELTAF_MSB
94 0x02,0xff,0x93, // AGCCONF1 IFS=1 KAGCIF=2 KAGCTUN=3
95 0x2d,0xff,0xf6, // SWEEP SWPOS=1 SWDYN=7 SWSTEP=1 SWLEN=2
96 0x04,0x10,0x00, // SWRAMP=1
97 0x12,0xff,0xa1, // INTP1 POCLKP=1 FEL=1 MFS=0
98 0x2b,0x01,0xa1, // INTS1
99 0x20,0xff,0x04, // INTP2 SWAPP=? MSBFIRSTP=? INTPSEL=?
100 0x2c,0xff,0x0d, // INTP/S TRIP=0 TRIS=0
101 0xc4,0xff,0x00,
102 0xc3,0x30,0x00,
103 0xb5,0xff,0x19, // ERAGC_THD
104 0x00,0x03,0x01, // GPR, CLBS soft reset
105 0x00,0x03,0x03, // GPR, CLBS soft reset
106 0xff,0x64,0x00, // Sleep 100ms
107 0xff,0xff,0xff
108 };
109
110 static u8 tda10023_readreg (struct tda10023_state* state, u8 reg)
111 {
112 u8 b0 [] = { reg };
113 u8 b1 [] = { 0 };
114 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
115 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
116 int ret;
117
118 ret = i2c_transfer (state->i2c, msg, 2);
119 if (ret != 2)
120 printk("DVB: TDA10023: %s: readreg error (ret == %i)\n",
121 __FUNCTION__, ret);
122 return b1[0];
123 }
124
125 static int tda10023_writereg (struct tda10023_state* state, u8 reg, u8 data)
126 {
127 u8 buf[] = { reg, data };
128 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
129 int ret;
130
131 ret = i2c_transfer (state->i2c, &msg, 1);
132 if (ret != 1)
133 printk("DVB: TDA10023(%d): %s, writereg error "
134 "(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
135 state->frontend.dvb->num, __FUNCTION__, reg, data, ret);
136
137 return (ret != 1) ? -EREMOTEIO : 0;
138 }
139
140
141 static int tda10023_writebit (struct tda10023_state* state, u8 reg, u8 mask,u8 data)
142 {
143 if (mask==0xff)
144 return tda10023_writereg(state, reg, data);
145 else {
146 u8 val;
147 val=tda10023_readreg(state,reg);
148 val&=~mask;
149 val|=(data&mask);
150 return tda10023_writereg(state, reg, val);
151 }
152 }
153
154 static void tda10023_writetab(struct tda10023_state* state, u8* tab)
155 {
156 u8 r,m,v;
157 while (1) {
158 r=*tab++;
159 m=*tab++;
160 v=*tab++;
161 if (r==0xff) {
162 if (m==0xff)
163 break;
164 else
165 msleep(m);
166 }
167 else
168 tda10023_writebit(state,r,m,v);
169 }
170 }
171
172 //get access to tuner
173 static int lock_tuner(struct tda10023_state* state)
174 {
175 u8 buf[2] = { 0x0f, 0xc0 };
176 struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
177
178 if(i2c_transfer(state->i2c, &msg, 1) != 1)
179 {
180 printk("tda10023: lock tuner fails\n");
181 return -EREMOTEIO;
182 }
183 return 0;
184 }
185
186 //release access from tuner
187 static int unlock_tuner(struct tda10023_state* state)
188 {
189 u8 buf[2] = { 0x0f, 0x40 };
190 struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
191
192 if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
193 {
194 printk("tda10023: unlock tuner fails\n");
195 return -EREMOTEIO;
196 }
197 return 0;
198 }
199
200 static int tda10023_setup_reg0 (struct tda10023_state* state, u8 reg0)
201 {
202 reg0 |= state->reg0 & 0x63;
203
204 tda10023_writereg (state, 0x00, reg0 & 0xfe);
205 tda10023_writereg (state, 0x00, reg0 | 0x01);
206
207 state->reg0 = reg0;
208 return 0;
209 }
210
211 static int tda10023_set_symbolrate (struct tda10023_state* state, u32 sr)
212 {
213 s32 BDR;
214 s32 BDRI;
215 s16 SFIL=0;
216 u16 NDEC = 0;
217
218 if (sr < (u32)(SYSCLK/98.40)) {
219 NDEC=3;
220 SFIL=1;
221 } else if (sr<(u32)(SYSCLK/64.0)) {
222 NDEC=3;
223 SFIL=0;
224 } else if (sr<(u32)(SYSCLK/49.2)) {
225 NDEC=2;
226 SFIL=1;
227 } else if (sr<(u32)(SYSCLK/32.0)) {
228 NDEC=2;
229 SFIL=0;
230 } else if (sr<(u32)(SYSCLK/24.6)) {
231 NDEC=1;
232 SFIL=1;
233 } else if (sr<(u32)(SYSCLK/16.0)) {
234 NDEC=1;
235 SFIL=0;
236 } else if (sr<(u32)(SYSCLK/12.3)) {
237 NDEC=0;
238 SFIL=1;
239 }
240
241 BDRI=SYSCLK*16;
242 BDRI>>=NDEC;
243 BDRI +=sr/2;
244 BDRI /=sr;
245
246 if (BDRI>255)
247 BDRI=255;
248
249 {
250 u64 BDRX;
251
252 BDRX=1<<(24+NDEC);
253 BDRX*=sr;
254 do_div(BDRX,SYSCLK); // BDRX/=SYSCLK;
255
256 BDR=(s32)BDRX;
257 }
258 // printk("Symbolrate %i, BDR %i BDRI %i, NDEC %i\n",sr,BDR,BDRI,NDEC);
259 tda10023_writebit (state, 0x03, 0xc0, NDEC<<6);
260 tda10023_writereg (state, 0x0a, BDR&255);
261 tda10023_writereg (state, 0x0b, (BDR>>8)&255);
262 tda10023_writereg (state, 0x0c, (BDR>>16)&31);
263 tda10023_writereg (state, 0x0d, BDRI);
264 tda10023_writereg (state, 0x3d, (SFIL<<7));
265 return 0;
266 }
267
268 static int tda10023_init (struct dvb_frontend *fe)
269 {
270 struct tda10023_state* state = fe->demodulator_priv;
271
272 dprintk("DVB: TDA10023(%d): init chip\n", fe->adapter->num);
273
274 tda10023_writetab(state, tda10023_inittab);
275
276 return 0;
277 }
278
279 static int tda10023_set_parameters (struct dvb_frontend *fe,
280 struct dvb_frontend_parameters *p)
281 {
282 struct tda10023_state* state = fe->demodulator_priv;
283
284 static int qamvals[6][6] = {
285 // QAM LOCKTHR MSETH AREF AGCREFNYQ ERAGCNYQ_THD
286 { (5<<2), 0x78, 0x8c, 0x96, 0x78, 0x4c }, // 4 QAM
287 { (0<<2), 0x87, 0xa2, 0x91, 0x8c, 0x57 }, // 16 QAM
288 { (1<<2), 0x64, 0x74, 0x96, 0x8c, 0x57 }, // 32 QAM
289 { (2<<2), 0x46, 0x43, 0x6a, 0x6a, 0x44 }, // 64 QAM
290 { (3<<2), 0x36, 0x34, 0x7e, 0x78, 0x4c }, // 128 QAM
291 { (4<<2), 0x26, 0x23, 0x6c, 0x5c, 0x3c }, // 256 QAM
292 };
293
294 int qam = p->u.qam.modulation;
295
296 if (qam < 0 || qam > 5)
297 return -EINVAL;
298
299 if (fe->ops.tuner_ops.set_params) {
300 fe->ops.tuner_ops.set_params(fe, p);
301 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
302 }
303
304 tda10023_set_symbolrate (state, p->u.qam.symbol_rate);
305 tda10023_writereg (state, 0x05, qamvals[qam][1]);
306 tda10023_writereg (state, 0x08, qamvals[qam][2]);
307 tda10023_writereg (state, 0x09, qamvals[qam][3]);
308 tda10023_writereg (state, 0xb4, qamvals[qam][4]);
309 tda10023_writereg (state, 0xb6, qamvals[qam][5]);
310
311 // tda10023_writereg (state, 0x04, (p->inversion?0x12:0x32));
312 // tda10023_writebit (state, 0x04, 0x60, (p->inversion?0:0x20));
313 tda10023_writebit (state, 0x04, 0x40, 0x40);
314 tda10023_setup_reg0 (state, qamvals[qam][0]);
315
316 return 0;
317 }
318
319 static int tda10023_read_status(struct dvb_frontend* fe, fe_status_t* status)
320 {
321 struct tda10023_state* state = fe->demodulator_priv;
322 int sync;
323
324 *status = 0;
325
326 //0x11[1] == CARLOCK -> Carrier locked
327 //0x11[2] == FSYNC -> Frame synchronisation
328 //0x11[3] == FEL -> Front End locked
329 //0x11[6] == NODVB -> DVB Mode Information
330 sync = tda10023_readreg (state, 0x11);
331
332 if (sync & 2)
333 *status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
334
335 if (sync & 4)
336 *status |= FE_HAS_SYNC|FE_HAS_VITERBI;
337
338 if (sync & 8)
339 *status |= FE_HAS_LOCK;
340
341 return 0;
342 }
343
344 static int tda10023_read_ber(struct dvb_frontend* fe, u32* ber)
345 {
346 struct tda10023_state* state = fe->demodulator_priv;
347 u8 a,b,c;
348 a=tda10023_readreg(state, 0x14);
349 b=tda10023_readreg(state, 0x15);
350 c=tda10023_readreg(state, 0x16)&0xf;
351 tda10023_writebit (state, 0x10, 0xc0, 0x00);
352
353 *ber = a | (b<<8)| (c<<16);
354 return 0;
355 }
356
357 static int tda10023_read_signal_strength(struct dvb_frontend* fe, u16* strength)
358 {
359 struct tda10023_state* state = fe->demodulator_priv;
360 u8 ifgain=tda10023_readreg(state, 0x2f);
361
362 u16 gain = ((255-tda10023_readreg(state, 0x17))) + (255-ifgain)/16;
363 // Max raw value is about 0xb0 -> Normalize to >0xf0 after 0x90
364 if (gain>0x90)
365 gain=gain+2*(gain-0x90);
366 if (gain>255)
367 gain=255;
368
369 *strength = (gain<<8)|gain;
370 return 0;
371 }
372
373 static int tda10023_read_snr(struct dvb_frontend* fe, u16* snr)
374 {
375 struct tda10023_state* state = fe->demodulator_priv;
376
377 u8 quality = ~tda10023_readreg(state, 0x18);
378 *snr = (quality << 8) | quality;
379 return 0;
380 }
381
382 static int tda10023_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
383 {
384 struct tda10023_state* state = fe->demodulator_priv;
385 u8 a,b,c,d;
386 a= tda10023_readreg (state, 0x74);
387 b= tda10023_readreg (state, 0x75);
388 c= tda10023_readreg (state, 0x76);
389 d= tda10023_readreg (state, 0x77);
390 *ucblocks = a | (b<<8)|(c<<16)|(d<<24);
391
392 tda10023_writebit (state, 0x10, 0x20,0x00);
393 tda10023_writebit (state, 0x10, 0x20,0x20);
394 tda10023_writebit (state, 0x13, 0x01, 0x00);
395
396 return 0;
397 }
398
399 static int tda10023_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
400 {
401 struct tda10023_state* state = fe->demodulator_priv;
402 int sync,inv;
403 s8 afc = 0;
404
405 sync = tda10023_readreg(state, 0x11);
406 afc = tda10023_readreg(state, 0x19);
407 inv = tda10023_readreg(state, 0x04);
408
409 if (verbose) {
410 /* AFC only valid when carrier has been recovered */
411 printk(sync & 2 ? "DVB: TDA10023(%d): AFC (%d) %dHz\n" :
412 "DVB: TDA10023(%d): [AFC (%d) %dHz]\n",
413 state->frontend.dvb->num, afc,
414 -((s32)p->u.qam.symbol_rate * afc) >> 10);
415 }
416
417 p->inversion = (inv&0x20?0:1);
418 p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16;
419
420 p->u.qam.fec_inner = FEC_NONE;
421 p->frequency = ((p->frequency + 31250) / 62500) * 62500;
422
423 if (sync & 2)
424 p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10;
425
426 return 0;
427 }
428
429 static int tda10023_sleep(struct dvb_frontend* fe)
430 {
431 struct tda10023_state* state = fe->demodulator_priv;
432
433 tda10023_writereg (state, 0x1b, 0x02); /* pdown ADC */
434 tda10023_writereg (state, 0x00, 0x80); /* standby */
435
436 return 0;
437 }
438
439 static int tda10023_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
440 {
441 struct tda10023_state* state = fe->demodulator_priv;
442
443 if (enable) {
444 lock_tuner(state);
445 } else {
446 unlock_tuner(state);
447 }
448 return 0;
449 }
450
451 static void tda10023_release(struct dvb_frontend* fe)
452 {
453 struct tda10023_state* state = fe->demodulator_priv;
454 kfree(state);
455 }
456
457 static struct dvb_frontend_ops tda10023_ops;
458
459 struct dvb_frontend* tda10023_attach(const struct tda1002x_config* config,
460 struct i2c_adapter* i2c,
461 u8 pwm)
462 {
463 struct tda10023_state* state = NULL;
464 int i;
465
466 /* allocate memory for the internal state */
467 state = kmalloc(sizeof(struct tda10023_state), GFP_KERNEL);
468 if (state == NULL) goto error;
469
470 /* setup the state */
471 state->config = config;
472 state->i2c = i2c;
473 memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
474 state->pwm = pwm;
475 for (i=0; i < ARRAY_SIZE(tda10023_inittab);i+=3) {
476 if (tda10023_inittab[i] == 0x00) {
477 state->reg0 = tda10023_inittab[i+2];
478 break;
479 }
480 }
481
482 // Wakeup if in standby
483 tda10023_writereg (state, 0x00, 0x33);
484 /* check if the demod is there */
485 if ((tda10023_readreg(state, 0x1a) & 0xf0) != 0x70) goto error;
486
487 /* create dvb_frontend */
488 memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
489 state->frontend.demodulator_priv = state;
490 return &state->frontend;
491
492 error:
493 kfree(state);
494 return NULL;
495 }
496
497 static struct dvb_frontend_ops tda10023_ops = {
498
499 .info = {
500 .name = "Philips TDA10023 DVB-C",
501 .type = FE_QAM,
502 .frequency_stepsize = 62500,
503 .frequency_min = 47000000,
504 .frequency_max = 862000000,
505 .symbol_rate_min = (SYSCLK/2)/64, /* SACLK/64 == (SYSCLK/2)/64 */
506 .symbol_rate_max = (SYSCLK/2)/4, /* SACLK/4 */
507 .caps = 0x400 | //FE_CAN_QAM_4
508 FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
509 FE_CAN_QAM_128 | FE_CAN_QAM_256 |
510 FE_CAN_FEC_AUTO
511 },
512
513 .release = tda10023_release,
514
515 .init = tda10023_init,
516 .sleep = tda10023_sleep,
517 .i2c_gate_ctrl = tda10023_i2c_gate_ctrl,
518
519 .set_frontend = tda10023_set_parameters,
520 .get_frontend = tda10023_get_frontend,
521
522 .read_status = tda10023_read_status,
523 .read_ber = tda10023_read_ber,
524 .read_signal_strength = tda10023_read_signal_strength,
525 .read_snr = tda10023_read_snr,
526 .read_ucblocks = tda10023_read_ucblocks,
527 };
528
529
530 MODULE_DESCRIPTION("Philips TDA10023 DVB-C demodulator driver");
531 MODULE_AUTHOR("Georg Acher, Hartmut Birr");
532 MODULE_LICENSE("GPL");
533
534 EXPORT_SYMBOL(tda10023_attach);
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