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V4L/DVB (9377): Add STB6100 Support
[net-next-2.6.git] / drivers / media / dvb / frontends / stb6100.c
CommitLineData
c46b6562
MA		 1/*
2 STB6100 Silicon Tuner
3 Copyright (C) Manu Abraham (abraham.manu@gmail.com)
4
5 Copyright (C) ST Microelectronics
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20*/
21
22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/string.h>
26
27#include "dvb_frontend.h"
28#include "stb6100.h"
29
30static unsigned int verbose;
31module_param(verbose, int, 0644);
32
33
34#define FE_ERROR 0
35#define FE_NOTICE 1
36#define FE_INFO 2
37#define FE_DEBUG 3
38
39#define dprintk(x, y, z, format, arg...) do { \
40 if (z) { \
41 if ((x > FE_ERROR) && (x > y)) \
42 printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
43 else if ((x > FE_NOTICE) && (x > y)) \
44 printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
45 else if ((x > FE_INFO) && (x > y)) \
46 printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
47 else if ((x > FE_DEBUG) && (x > y)) \
48 printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
49 } else { \
50 if (x > y) \
51 printk(format, ##arg); \
52 } \
53} while(0)
54
55struct stb6100_lkup {
56 u32 val_low;
57 u32 val_high;
58 u8 reg;
59};
60
61static int stb6100_release(struct dvb_frontend *fe);
62
63static const struct stb6100_lkup lkup[] = {
64 { 0, 950000, 0x0a },
65 { 950000, 1000000, 0x0a },
66 { 1000000, 1075000, 0x0c },
67 { 1075000, 1200000, 0x00 },
68 { 1200000, 1300000, 0x01 },
69 { 1300000, 1370000, 0x02 },
70 { 1370000, 1470000, 0x04 },
71 { 1470000, 1530000, 0x05 },
72 { 1530000, 1650000, 0x06 },
73 { 1650000, 1800000, 0x08 },
74 { 1800000, 1950000, 0x0a },
75 { 1950000, 2150000, 0x0c },
76 { 2150000, 9999999, 0x0c },
77 { 0, 0, 0x00 }
78};
79
80/* Register names for easy debugging. */
81static const char *stb6100_regnames[] = {
82 [STB6100_LD] = "LD",
83 [STB6100_VCO] = "VCO",
84 [STB6100_NI] = "NI",
85 [STB6100_NF_LSB] = "NF",
86 [STB6100_K] = "K",
87 [STB6100_G] = "G",
88 [STB6100_F] = "F",
89 [STB6100_DLB] = "DLB",
90 [STB6100_TEST1] = "TEST1",
91 [STB6100_FCCK] = "FCCK",
92 [STB6100_LPEN] = "LPEN",
93 [STB6100_TEST3] = "TEST3",
94};
95
96/* Template for normalisation, i.e. setting unused or undocumented
97 * bits as required according to the documentation.
98 */
99struct stb6100_regmask {
100 u8 mask;
101 u8 set;
102};
103
104static const struct stb6100_regmask stb6100_template[] = {
105 [STB6100_LD] = { 0xff, 0x00 },
106 [STB6100_VCO] = { 0xff, 0x00 },
107 [STB6100_NI] = { 0xff, 0x00 },
108 [STB6100_NF_LSB] = { 0xff, 0x00 },
109 [STB6100_K] = { 0xc7, 0x38 },
110 [STB6100_G] = { 0xef, 0x10 },
111 [STB6100_F] = { 0x1f, 0xc0 },
112 [STB6100_DLB] = { 0x38, 0xc4 },
113 [STB6100_TEST1] = { 0x00, 0x8f },
114 [STB6100_FCCK] = { 0x40, 0x0d },
115 [STB6100_LPEN] = { 0xf0, 0x0b },
116 [STB6100_TEST3] = { 0x00, 0xde },
117};
118
119static void stb6100_normalise_regs(u8 regs[])
120{
121 int i;
122
123 for (i = 0; i < STB6100_NUMREGS; i++)
124 regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set;
125}
126
127static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
128{
129 int rc;
130 struct i2c_msg msg = {
131 .addr = state->config->tuner_address,
132 .flags = I2C_M_RD,
133 .buf = regs,
134 .len = STB6100_NUMREGS
135 };
136
137 if (state->frontend->ops.i2c_gate_ctrl)
138 if ((rc = state->frontend->ops.i2c_gate_ctrl(state->frontend, 1)) < 0)
139 return rc;
140
141 rc = i2c_transfer(state->i2c, &msg, 1);
142 if (state->frontend->ops.i2c_gate_ctrl) {
143 int rc2;
144 if ((rc2 = state->frontend->ops.i2c_gate_ctrl(state->frontend, 0)) < 0)
145 return rc2;
146 }
147 if (unlikely(rc != 1)) {
148 dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
149 state->config->tuner_address, rc);
150
151 return -EREMOTEIO;
152 }
153 if (unlikely(verbose > FE_DEBUG)) {
154 int i;
155
156 dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
157 for (i = 0; i < STB6100_NUMREGS; i++)
158 dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[i], regs[i]);
159 }
160 return 0;
161}
162
163static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
164{
165 u8 regs[STB6100_NUMREGS];
166 int rc;
167
168 if (unlikely(reg >= STB6100_NUMREGS)) {
169 dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
170 return -EINVAL;
171 }
172 if ((rc = stb6100_read_regs(state, regs)) < 0)
173 return rc;
174 return (unsigned int)regs[reg];
175}
176
177static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
178{
179 int rc;
180 u8 cmdbuf[len + 1];
181 struct i2c_msg msg = {
182 .addr = state->config->tuner_address,
183 .flags = 0,
184 .buf = cmdbuf,
185 .len = len + 1
186 };
187
188 if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) {
189 dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
190 start, len);
191 return -EINVAL;
192 }
193 memcpy(&cmdbuf[1], buf, len);
194 cmdbuf[0] = start;
195
196 if (unlikely(verbose > FE_DEBUG)) {
197 int i;
198
199 dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
200 for (i = 0; i < len; i++)
201 dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
202 }
203 if (state->frontend->ops.i2c_gate_ctrl)
204 if ((rc = state->frontend->ops.i2c_gate_ctrl(state->frontend, 1)) < 0)
205 return rc;
206 rc = i2c_transfer(state->i2c, &msg, 1);
207 if (state->frontend->ops.i2c_gate_ctrl) {
208 int rc2;
209 if ((rc2 = state->frontend->ops.i2c_gate_ctrl(state->frontend, 0)) < 0)
210 return rc2;
211 }
212 if (unlikely(rc != 1)) {
213 dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
214 (unsigned int)state->config->tuner_address, start, len, rc);
215 return -EREMOTEIO;
216 }
217 return 0;
218}
219
220static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
221{
222 if (unlikely(reg >= STB6100_NUMREGS)) {
223 dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
224 return -EREMOTEIO;
225 }
226 data = (data & stb6100_template[reg].mask) | stb6100_template[reg].set;
227 return stb6100_write_reg_range(state, &data, reg, 1);
228}
229
230static int stb6100_write_regs(struct stb6100_state *state, u8 regs[])
231{
232 stb6100_normalise_regs(regs);
233 return stb6100_write_reg_range(state, &regs[1], 1, STB6100_NUMREGS - 1);
234}
235
236static int stb6100_get_status(struct dvb_frontend *fe, u32 *status)
237{
238 int rc;
239 struct stb6100_state *state = fe->tuner_priv;
240
241 if ((rc = stb6100_read_reg(state, STB6100_LD)) < 0)
242 return rc;
243
244 return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
245}
246
247static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
248{
249 int rc;
250 u8 f;
251 struct stb6100_state *state = fe->tuner_priv;
252
253 if ((rc = stb6100_read_reg(state, STB6100_F)) < 0)
254 return rc;
255 f = rc & STB6100_F_F;
256
257 state->status.bandwidth = (f + 5) * 2000; /* x2 for ZIF */
258
259 *bandwidth = state->bandwidth = state->status.bandwidth * 1000;
260 dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
261 return 0;
262}
263
264static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
265{
266 u32 tmp;
267 int rc;
268 struct stb6100_state *state = fe->tuner_priv;
269
270 dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u kHz", bandwidth);
271
272 bandwidth *= 1000 / 2; /* kHz -> Hz, bw / 2 */
273
274 if (bandwidth > 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */
275 tmp = 31;
276 if (bandwidth < 5000000) /* bw/2 min = 5Mhz for F=0 */
277 tmp = 0;
278 else /* if 5 < bw/2 < 36 */
279 tmp = bandwidth / 1000000 - 5;
280
281 /* Turn on LPF bandwidth setting clock control,
282 * set bandwidth, wait 10ms, turn off.
283 */
284 if ((rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK)) < 0)
285 return rc;
286 if ((rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp)) < 0)
287 return rc;
288 msleep(1);
289 if ((rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d)) < 0)
290 return rc;
291
292 return 0;
293}
294
295static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
296{
297 int rc;
298 u32 nint, nfrac, fvco;
299 int psd2, odiv;
300 struct stb6100_state *state = fe->tuner_priv;
301 u8 regs[STB6100_NUMREGS];
302
303 if ((rc = stb6100_read_regs(state, regs)) < 0)
304 return rc;
305
306 odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
307 psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
308 nint = regs[STB6100_NI];
309 nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB];
310 fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
311 *frequency = state->frequency = fvco >> (odiv + 1);
312
313 dprintk(verbose, FE_DEBUG, 1,
314 "frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
315 state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac);
316 return 0;
317}
318
319
320static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
321{
322 int rc;
323 const struct stb6100_lkup *ptr;
324 struct stb6100_state *state = fe->tuner_priv;
325 struct dvbfe_params params;
326
327 u32 srate = 0, fvco, nint, nfrac;
328 u8 regs[STB6100_NUMREGS];
329 u8 g, psd2, odiv;
330
331 if ((rc = stb6100_read_regs(state, regs)) < 0)
332 return rc;
333 if (fe->ops.get_params) {
334 dprintk(verbose, FE_DEBUG, 1, "Get Frontend parameters");
335 fe->ops.get_params(fe, &params);
336 }
337 switch (params.delivery) {
338 case DVBFE_DELSYS_DVBS:
339 srate = params.delsys.dvbs.symbol_rate;
340 dprintk(verbose, FE_DEBUG, 1, "Delivery system = DVB-S, Symbol Rate=[%d]", srate);
341 break;
342 case DVBFE_DELSYS_DSS:
343 dprintk(verbose, FE_DEBUG, 1, "Delivery system = DSS, Symbol Rate=[%d]", srate);
344 srate = params.delsys.dss.symbol_rate;
345 break;
346 case DVBFE_DELSYS_DVBS2:
347 dprintk(verbose, FE_DEBUG, 1, "Delivery system = DVB-S2, Symbol Rate=[%d]", srate);
348 srate = params.delsys.dvbs2.symbol_rate;
349 break;
350 default:
351 dprintk(verbose, FE_NOTICE, 1, "symbol rate unknown!");
352 srate = 22000000; /* just a typical default value */
353 }
354
355 /* Baseband gain. */
356 if (srate >= 15000000)
357 g = 8;
358 else if (state->srate >= 5000000)
359 g = 12;
360 else
361 g = 14;
362 regs[STB6100_G] = (regs[STB6100_G] & ~STB6100_G_G) | g;
363
364 /* VCO divide ratio (LO divide ratio, VCO prescaler enable). */
365 if (frequency <= 1075000)
366 odiv = 1;
367 else
368 odiv = 0;
369 regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_ODIV) | (odiv << STB6100_VCO_ODIV_SHIFT);
370
371 if ((frequency > 1075000) && (frequency <= 1325000))
372 psd2 = 0;
373 else
374 psd2 = 1;
375 regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT);
376
377 /* OSM */
378 for (ptr = lkup;
379 (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
380 ptr++);
381 if (ptr->val_high == 0) {
382 printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
383 return -EINVAL;
384 }
385 regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg;
386
387 /* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4) */
388 fvco = frequency << (1 + odiv);
389 /* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */
390 nint = fvco / (state->reference << psd2);
391 /* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */
392 nfrac = (((fvco - (nint * state->reference << psd2)) << (9 - psd2)) + state->reference / 2) / state->reference;
393 dprintk(verbose, FE_DEBUG, 1,
394 "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
395 frequency, srate, (unsigned int)g, (unsigned int)odiv,
396 (unsigned int)psd2, state->reference,
397 ptr->reg, fvco, nint, nfrac);
398 regs[STB6100_NI] = nint;
399 regs[STB6100_NF_LSB] = nfrac;
400 regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB);
401 regs[STB6100_VCO] |= STB6100_VCO_OSCH; /* VCO search enabled */
402 regs[STB6100_VCO] |= STB6100_VCO_OCK; /* VCO search clock off */
403 regs[STB6100_FCCK] |= STB6100_FCCK_FCCK; /* LPF BW setting clock enabled */
404 regs[STB6100_LPEN] &= ~STB6100_LPEN_LPEN; /* PLL loop disabled */
405 /* Power up. */
406 regs[STB6100_LPEN] |= STB6100_LPEN_SYNP | STB6100_LPEN_OSCP | STB6100_LPEN_BEN;
407
408 if ((rc = stb6100_write_regs(state, regs)) < 0)
409 return rc;
410
411 regs[STB6100_LPEN] |= STB6100_LPEN_LPEN; /* PLL loop enabled */
412 if ((rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN])) < 0)
413 return rc;
414
415 regs[STB6100_VCO] &= ~STB6100_VCO_OCK; /* VCO fast search */
416 if ((rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO])) < 0)
417 return rc;
418
419 msleep(5); /* wait for LO to lock */
420 regs[STB6100_VCO] &= ~STB6100_VCO_OSCH; /* vco search disabled */
421 regs[STB6100_VCO] |= STB6100_VCO_OCK; /* search clock off */
422 if ((rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO])) < 0)
423 return rc;
424 regs[STB6100_FCCK] &= ~STB6100_FCCK_FCCK; /* LPF BW clock disabled */
425 if ((rc = stb6100_write_reg(state, STB6100_FCCK, regs[STB6100_FCCK])) < 0)
426 return rc;
427
428 return 0;
429}
430
431static int stb6100_sleep(struct dvb_frontend *fe)
432{
433 /* TODO: power down */
434 return 0;
435}
436
437static int stb6100_init(struct dvb_frontend *fe)
438{
439 struct stb6100_state *state = fe->tuner_priv;
440 struct tuner_state *status = &state->status;
441
442 status->tunerstep = 125000;
443 status->ifreq = 0;
444 status->refclock = 27000000; /* Hz */
445 status->iqsense = 1;
446 status->bandwidth = 36000; /* kHz */
447 state->bandwidth = status->bandwidth * 1000; /* MHz */
448 state->reference = status->refclock / 1000; /* kHz */
449
450 /* Set default bandwidth. */
451 return stb6100_set_bandwidth(fe, status->bandwidth);
452}
453
454static int stb6100_get_state(struct dvb_frontend *fe,
455 enum tuner_param param,
456 struct tuner_state *state)
457{
458 switch (param) {
459 case DVBFE_TUNER_FREQUENCY:
460 stb6100_get_frequency(fe, &state->frequency);
461 break;
462 case DVBFE_TUNER_TUNERSTEP:
463 break;
464 case DVBFE_TUNER_IFFREQ:
465 break;
466 case DVBFE_TUNER_BANDWIDTH:
467 stb6100_get_bandwidth(fe, &state->bandwidth);
468 break;
469 case DVBFE_TUNER_REFCLOCK:
470 break;
471 default:
472 break;
473 }
474
475 return 0;
476}
477
478static int stb6100_set_state(struct dvb_frontend *fe,
479 enum tuner_param param,
480 struct tuner_state *state)
481{
482 struct stb6100_state *tstate = fe->tuner_priv;
483
484 switch (param) {
485 case DVBFE_TUNER_FREQUENCY:
486 stb6100_set_frequency(fe, state->frequency);
487 state->frequency = tstate->frequency;
488 break;
489 case DVBFE_TUNER_TUNERSTEP:
490 break;
491 case DVBFE_TUNER_IFFREQ:
492 break;
493 case DVBFE_TUNER_BANDWIDTH:
494 stb6100_set_bandwidth(fe, state->bandwidth);
495 state->bandwidth = tstate->bandwidth;
496 break;
497 case DVBFE_TUNER_REFCLOCK:
498 break;
499 default:
500 break;
501 }
502
503 return 0;
504}
505
506static struct dvb_tuner_ops stb6100_ops = {
507 .info = {
508 .name = "STB6100 Silicon Tuner",
509 .frequency_min = 950000,
510 .frequency_max = 2150000,
511 .frequency_step = 0,
512 },
513
514 .init = stb6100_init,
515 .sleep = stb6100_sleep,
516 .get_status = stb6100_get_status,
517 .get_state = stb6100_get_state,
518 .set_state = stb6100_set_state,
519 .get_frequency = stb6100_get_frequency,
520 .get_bandwidth = stb6100_get_bandwidth,
521 .release = stb6100_release
522};
523
524struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
525 struct stb6100_config *config,
526 struct i2c_adapter *i2c)
527{
528 struct stb6100_state *state = NULL;
529
530 state = kmalloc(sizeof (struct stb6100_state), GFP_KERNEL);
531 if (state == NULL)
532 goto error;
533
534 state->config = config;
535 state->i2c = i2c;
536 state->frontend = fe;
537 state->reference = config->refclock;
538 fe->tuner_priv = state;
539 fe->ops.tuner_ops = stb6100_ops;
540
541 printk("%s: Attaching\n", __func__);
542 return fe;
543
544error:
545 kfree(state);
546
547 return NULL;
548}
549
550static int stb6100_release(struct dvb_frontend *fe)
551{
552 struct stb6100_state *state = fe->tuner_priv;
553
554 fe->tuner_priv = NULL;
555 memset(&fe->ops.tuner_ops, 0, sizeof (fe->ops.tuner_ops));
556 kfree(state);
557
558 return 0;
559}
560
561EXPORT_SYMBOL(stb6100_attach);
562MODULE_PARM_DESC(verbose, "Set Verbosity level");
563
564MODULE_AUTHOR("Manu Abraham");
565MODULE_DESCRIPTION("STB6100 Silicon tuner");
566MODULE_LICENSE("GPL");
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