Merge master.kernel.org:/home/rmk/linux-2.6-mmc
[linux-2.6] / drivers / media / dvb / frontends / tda10021.c
1 /*
2     TDA10021  - Single Chip Cable Channel Receiver driver module
3                used on the the Siemens DVB-C cards
4
5     Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
6     Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
7                    Support for TDA10021
8
9     This program is free software; you can redistribute it and/or modify
10     it under the terms of the GNU General Public License as published by
11     the Free Software Foundation; either version 2 of the License, or
12     (at your option) any later version.
13
14     This program is distributed in the hope that it will be useful,
15     but WITHOUT ANY WARRANTY; without even the implied warranty of
16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17     GNU General Public License for more details.
18
19     You should have received a copy of the GNU General Public License
20     along with this program; if not, write to the Free Software
21     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include <linux/config.h>
25 #include <linux/delay.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/string.h>
31 #include <linux/slab.h>
32
33 #include "dvb_frontend.h"
34 #include "tda10021.h"
35
36
37 struct tda10021_state {
38         struct i2c_adapter* i2c;
39         struct dvb_frontend_ops ops;
40         /* configuration settings */
41         const struct tda10021_config* config;
42         struct dvb_frontend frontend;
43
44         u8 pwm;
45         u8 reg0;
46 };
47
48
49 #if 0
50 #define dprintk(x...) printk(x)
51 #else
52 #define dprintk(x...)
53 #endif
54
55 static int verbose;
56
57 #define XIN 57840000UL
58 #define DISABLE_INVERSION(reg0)         do { reg0 |= 0x20; } while (0)
59 #define ENABLE_INVERSION(reg0)          do { reg0 &= ~0x20; } while (0)
60 #define HAS_INVERSION(reg0)             (!(reg0 & 0x20))
61
62 #define FIN (XIN >> 4)
63
64 static int tda10021_inittab_size = 0x40;
65 static u8 tda10021_inittab[0x40]=
66 {
67         0x73, 0x6a, 0x23, 0x0a, 0x02, 0x37, 0x77, 0x1a,
68         0x37, 0x6a, 0x17, 0x8a, 0x1e, 0x86, 0x43, 0x40,
69         0xb8, 0x3f, 0xa0, 0x00, 0xcd, 0x01, 0x00, 0xff,
70         0x11, 0x00, 0x7c, 0x31, 0x30, 0x20, 0x00, 0x00,
71         0x02, 0x00, 0x00, 0x7d, 0x00, 0x00, 0x00, 0x00,
72         0x07, 0x00, 0x33, 0x11, 0x0d, 0x95, 0x08, 0x58,
73         0x00, 0x00, 0x80, 0x00, 0x80, 0xff, 0x00, 0x00,
74         0x04, 0x2d, 0x2f, 0xff, 0x00, 0x00, 0x00, 0x00,
75 };
76
77 static int tda10021_writereg (struct tda10021_state* state, u8 reg, u8 data)
78 {
79         u8 buf[] = { reg, data };
80         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
81         int ret;
82
83         ret = i2c_transfer (state->i2c, &msg, 1);
84         if (ret != 1)
85                 printk("DVB: TDA10021(%d): %s, writereg error "
86                         "(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
87                         state->frontend.dvb->num, __FUNCTION__, reg, data, ret);
88
89         msleep(10);
90         return (ret != 1) ? -EREMOTEIO : 0;
91 }
92
93 static u8 tda10021_readreg (struct tda10021_state* state, u8 reg)
94 {
95         u8 b0 [] = { reg };
96         u8 b1 [] = { 0 };
97         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
98                                   { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
99         int ret;
100
101         ret = i2c_transfer (state->i2c, msg, 2);
102         if (ret != 2)
103                 printk("DVB: TDA10021: %s: readreg error (ret == %i)\n",
104                                 __FUNCTION__, ret);
105         return b1[0];
106 }
107
108 //get access to tuner
109 static int lock_tuner(struct tda10021_state* state)
110 {
111         u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] | 0x80 };
112         struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
113
114         if(i2c_transfer(state->i2c, &msg, 1) != 1)
115         {
116                 printk("tda10021: lock tuner fails\n");
117                 return -EREMOTEIO;
118         }
119         return 0;
120 }
121
122 //release access from tuner
123 static int unlock_tuner(struct tda10021_state* state)
124 {
125         u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] & 0x7f };
126         struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
127
128         if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
129         {
130                 printk("tda10021: unlock tuner fails\n");
131                 return -EREMOTEIO;
132         }
133         return 0;
134 }
135
136 static int tda10021_setup_reg0 (struct tda10021_state* state, u8 reg0,
137                                 fe_spectral_inversion_t inversion)
138 {
139         reg0 |= state->reg0 & 0x63;
140
141         if (INVERSION_ON == inversion)
142                 ENABLE_INVERSION(reg0);
143         else if (INVERSION_OFF == inversion)
144                 DISABLE_INVERSION(reg0);
145
146         tda10021_writereg (state, 0x00, reg0 & 0xfe);
147         tda10021_writereg (state, 0x00, reg0 | 0x01);
148
149         state->reg0 = reg0;
150         return 0;
151 }
152
153 static int tda10021_set_symbolrate (struct tda10021_state* state, u32 symbolrate)
154 {
155         s32 BDR;
156         s32 BDRI;
157         s16 SFIL=0;
158         u16 NDEC = 0;
159         u32 tmp, ratio;
160
161         if (symbolrate > XIN/2)
162                 symbolrate = XIN/2;
163         if (symbolrate < 500000)
164                 symbolrate = 500000;
165
166         if (symbolrate < XIN/16) NDEC = 1;
167         if (symbolrate < XIN/32) NDEC = 2;
168         if (symbolrate < XIN/64) NDEC = 3;
169
170         if (symbolrate < (u32)(XIN/12.3)) SFIL = 1;
171         if (symbolrate < (u32)(XIN/16))  SFIL = 0;
172         if (symbolrate < (u32)(XIN/24.6)) SFIL = 1;
173         if (symbolrate < (u32)(XIN/32))  SFIL = 0;
174         if (symbolrate < (u32)(XIN/49.2)) SFIL = 1;
175         if (symbolrate < (u32)(XIN/64))  SFIL = 0;
176         if (symbolrate < (u32)(XIN/98.4)) SFIL = 1;
177
178         symbolrate <<= NDEC;
179         ratio = (symbolrate << 4) / FIN;
180         tmp =  ((symbolrate << 4) % FIN) << 8;
181         ratio = (ratio << 8) + tmp / FIN;
182         tmp = (tmp % FIN) << 8;
183         ratio = (ratio << 8) + (tmp + FIN/2) / FIN;
184
185         BDR = ratio;
186         BDRI = (((XIN << 5) / symbolrate) + 1) / 2;
187
188         if (BDRI > 0xFF)
189                 BDRI = 0xFF;
190
191         SFIL = (SFIL << 4) | tda10021_inittab[0x0E];
192
193         NDEC = (NDEC << 6) | tda10021_inittab[0x03];
194
195         tda10021_writereg (state, 0x03, NDEC);
196         tda10021_writereg (state, 0x0a, BDR&0xff);
197         tda10021_writereg (state, 0x0b, (BDR>> 8)&0xff);
198         tda10021_writereg (state, 0x0c, (BDR>>16)&0x3f);
199
200         tda10021_writereg (state, 0x0d, BDRI);
201         tda10021_writereg (state, 0x0e, SFIL);
202
203         return 0;
204 }
205
206 static int tda10021_init (struct dvb_frontend *fe)
207 {
208         struct tda10021_state* state = fe->demodulator_priv;
209         int i;
210
211         dprintk("DVB: TDA10021(%d): init chip\n", fe->adapter->num);
212
213         //tda10021_writereg (fe, 0, 0);
214
215         for (i=0; i<tda10021_inittab_size; i++)
216                 tda10021_writereg (state, i, tda10021_inittab[i]);
217
218         tda10021_writereg (state, 0x34, state->pwm);
219
220         //Comment by markus
221         //0x2A[3-0] == PDIV -> P multiplaying factor (P=PDIV+1)(default 0)
222         //0x2A[4] == BYPPLL -> Power down mode (default 1)
223         //0x2A[5] == LCK -> PLL Lock Flag
224         //0x2A[6] == POLAXIN -> Polarity of the input reference clock (default 0)
225
226         //Activate PLL
227         tda10021_writereg(state, 0x2a, tda10021_inittab[0x2a] & 0xef);
228
229         if (state->config->pll_init) {
230                 lock_tuner(state);
231                 state->config->pll_init(fe);
232                 unlock_tuner(state);
233         }
234
235         return 0;
236 }
237
238 static int tda10021_set_parameters (struct dvb_frontend *fe,
239                             struct dvb_frontend_parameters *p)
240 {
241         struct tda10021_state* state = fe->demodulator_priv;
242
243         //table for QAM4-QAM256 ready  QAM4  QAM16 QAM32 QAM64 QAM128 QAM256
244         //CONF
245         static const u8 reg0x00 [] = { 0x14, 0x00, 0x04, 0x08, 0x0c,  0x10 };
246         //AGCREF value
247         static const u8 reg0x01 [] = { 0x78, 0x8c, 0x8c, 0x6a, 0x78,  0x5c };
248         //LTHR value
249         static const u8 reg0x05 [] = { 0x78, 0x87, 0x64, 0x46, 0x36,  0x26 };
250         //MSETH
251         static const u8 reg0x08 [] = { 0x8c, 0xa2, 0x74, 0x43, 0x34,  0x23 };
252         //AREF
253         static const u8 reg0x09 [] = { 0x96, 0x91, 0x96, 0x6a, 0x7e,  0x6b };
254
255         int qam = p->u.qam.modulation;
256
257         if (qam < 0 || qam > 5)
258                 return -EINVAL;
259
260         //printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->u.qam.symbol_rate);
261
262         lock_tuner(state);
263         state->config->pll_set(fe, p);
264         unlock_tuner(state);
265
266         tda10021_set_symbolrate (state, p->u.qam.symbol_rate);
267         tda10021_writereg (state, 0x34, state->pwm);
268
269         tda10021_writereg (state, 0x01, reg0x01[qam]);
270         tda10021_writereg (state, 0x05, reg0x05[qam]);
271         tda10021_writereg (state, 0x08, reg0x08[qam]);
272         tda10021_writereg (state, 0x09, reg0x09[qam]);
273
274         tda10021_setup_reg0 (state, reg0x00[qam], p->inversion);
275
276         return 0;
277 }
278
279 static int tda10021_read_status(struct dvb_frontend* fe, fe_status_t* status)
280 {
281         struct tda10021_state* state = fe->demodulator_priv;
282         int sync;
283
284         *status = 0;
285         //0x11[0] == EQALGO -> Equalizer algorithms state
286         //0x11[1] == CARLOCK -> Carrier locked
287         //0x11[2] == FSYNC -> Frame synchronisation
288         //0x11[3] == FEL -> Front End locked
289         //0x11[6] == NODVB -> DVB Mode Information
290         sync = tda10021_readreg (state, 0x11);
291
292         if (sync & 2)
293                 *status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
294
295         if (sync & 4)
296                 *status |= FE_HAS_SYNC|FE_HAS_VITERBI;
297
298         if (sync & 8)
299                 *status |= FE_HAS_LOCK;
300
301         return 0;
302 }
303
304 static int tda10021_read_ber(struct dvb_frontend* fe, u32* ber)
305 {
306         struct tda10021_state* state = fe->demodulator_priv;
307
308         u32 _ber = tda10021_readreg(state, 0x14) |
309                 (tda10021_readreg(state, 0x15) << 8) |
310                 ((tda10021_readreg(state, 0x16) & 0x0f) << 16);
311         *ber = 10 * _ber;
312
313         return 0;
314 }
315
316 static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength)
317 {
318         struct tda10021_state* state = fe->demodulator_priv;
319
320         u8 gain = tda10021_readreg(state, 0x17);
321         *strength = (gain << 8) | gain;
322
323         return 0;
324 }
325
326 static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr)
327 {
328         struct tda10021_state* state = fe->demodulator_priv;
329
330         u8 quality = ~tda10021_readreg(state, 0x18);
331         *snr = (quality << 8) | quality;
332
333         return 0;
334 }
335
336 static int tda10021_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
337 {
338         struct tda10021_state* state = fe->demodulator_priv;
339
340         *ucblocks = tda10021_readreg (state, 0x13) & 0x7f;
341         if (*ucblocks == 0x7f)
342                 *ucblocks = 0xffffffff;
343
344         /* reset uncorrected block counter */
345         tda10021_writereg (state, 0x10, tda10021_inittab[0x10] & 0xdf);
346         tda10021_writereg (state, 0x10, tda10021_inittab[0x10]);
347
348         return 0;
349 }
350
351 static int tda10021_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
352 {
353         struct tda10021_state* state = fe->demodulator_priv;
354         int sync;
355         s8 afc = 0;
356
357         sync = tda10021_readreg(state, 0x11);
358         afc = tda10021_readreg(state, 0x19);
359         if (verbose) {
360                 /* AFC only valid when carrier has been recovered */
361                 printk(sync & 2 ? "DVB: TDA10021(%d): AFC (%d) %dHz\n" :
362                                   "DVB: TDA10021(%d): [AFC (%d) %dHz]\n",
363                         state->frontend.dvb->num, afc,
364                        -((s32)p->u.qam.symbol_rate * afc) >> 10);
365         }
366
367         p->inversion = HAS_INVERSION(state->reg0) ? INVERSION_ON : INVERSION_OFF;
368         p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16;
369
370         p->u.qam.fec_inner = FEC_NONE;
371         p->frequency = ((p->frequency + 31250) / 62500) * 62500;
372
373         if (sync & 2)
374                 p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10;
375
376         return 0;
377 }
378
379 static int tda10021_sleep(struct dvb_frontend* fe)
380 {
381         struct tda10021_state* state = fe->demodulator_priv;
382
383         tda10021_writereg (state, 0x1b, 0x02);  /* pdown ADC */
384         tda10021_writereg (state, 0x00, 0x80);  /* standby */
385
386         return 0;
387 }
388
389 static void tda10021_release(struct dvb_frontend* fe)
390 {
391         struct tda10021_state* state = fe->demodulator_priv;
392         kfree(state);
393 }
394
395 static struct dvb_frontend_ops tda10021_ops;
396
397 struct dvb_frontend* tda10021_attach(const struct tda10021_config* config,
398                                      struct i2c_adapter* i2c,
399                                      u8 pwm)
400 {
401         struct tda10021_state* state = NULL;
402
403         /* allocate memory for the internal state */
404         state = kmalloc(sizeof(struct tda10021_state), GFP_KERNEL);
405         if (state == NULL) goto error;
406
407         /* setup the state */
408         state->config = config;
409         state->i2c = i2c;
410         memcpy(&state->ops, &tda10021_ops, sizeof(struct dvb_frontend_ops));
411         state->pwm = pwm;
412         state->reg0 = tda10021_inittab[0];
413
414         /* check if the demod is there */
415         if ((tda10021_readreg(state, 0x1a) & 0xf0) != 0x70) goto error;
416
417         /* create dvb_frontend */
418         state->frontend.ops = &state->ops;
419         state->frontend.demodulator_priv = state;
420         return &state->frontend;
421
422 error:
423         kfree(state);
424         return NULL;
425 }
426
427 static struct dvb_frontend_ops tda10021_ops = {
428
429         .info = {
430                 .name = "Philips TDA10021 DVB-C",
431                 .type = FE_QAM,
432                 .frequency_stepsize = 62500,
433                 .frequency_min = 51000000,
434                 .frequency_max = 858000000,
435                 .symbol_rate_min = (XIN/2)/64,     /* SACLK/64 == (XIN/2)/64 */
436                 .symbol_rate_max = (XIN/2)/4,      /* SACLK/4 */
437 #if 0
438                 .frequency_tolerance = ???,
439                 .symbol_rate_tolerance = ???,  /* ppm */  /* == 8% (spec p. 5) */
440         #endif
441                 .caps = 0x400 | //FE_CAN_QAM_4
442                         FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
443                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
444                         FE_CAN_FEC_AUTO
445         },
446
447         .release = tda10021_release,
448
449         .init = tda10021_init,
450         .sleep = tda10021_sleep,
451
452         .set_frontend = tda10021_set_parameters,
453         .get_frontend = tda10021_get_frontend,
454
455         .read_status = tda10021_read_status,
456         .read_ber = tda10021_read_ber,
457         .read_signal_strength = tda10021_read_signal_strength,
458         .read_snr = tda10021_read_snr,
459         .read_ucblocks = tda10021_read_ucblocks,
460 };
461
462 module_param(verbose, int, 0644);
463 MODULE_PARM_DESC(verbose, "print AFC offset after tuning for debugging the PWM setting");
464
465 MODULE_DESCRIPTION("Philips TDA10021 DVB-C demodulator driver");
466 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Markus Schulz");
467 MODULE_LICENSE("GPL");
468
469 EXPORT_SYMBOL(tda10021_attach);