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22#include <linux/init.h>
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/slab.h>
26#include <linux/string.h>
27
28#include "dvb_frontend.h"
29#include "stb6100.h"
30
31static unsigned int verbose;
32module_param(verbose, int, 0644);
33
34
35#define MAX_XFER_SIZE 64
36
37#define FE_ERROR 0
38#define FE_NOTICE 1
39#define FE_INFO 2
40#define FE_DEBUG 3
41
42#define dprintk(x, y, z, format, arg...) do { \
43 if (z) { \
44 if ((x > FE_ERROR) && (x > y)) \
45 printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
46 else if ((x > FE_NOTICE) && (x > y)) \
47 printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
48 else if ((x > FE_INFO) && (x > y)) \
49 printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
50 else if ((x > FE_DEBUG) && (x > y)) \
51 printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
52 } else { \
53 if (x > y) \
54 printk(format, ##arg); \
55 } \
56} while (0)
57
58struct stb6100_lkup {
59 u32 val_low;
60 u32 val_high;
61 u8 reg;
62};
63
64static int stb6100_release(struct dvb_frontend *fe);
65
66static const struct stb6100_lkup lkup[] = {
67 { 0, 950000, 0x0a },
68 { 950000, 1000000, 0x0a },
69 { 1000000, 1075000, 0x0c },
70 { 1075000, 1200000, 0x00 },
71 { 1200000, 1300000, 0x01 },
72 { 1300000, 1370000, 0x02 },
73 { 1370000, 1470000, 0x04 },
74 { 1470000, 1530000, 0x05 },
75 { 1530000, 1650000, 0x06 },
76 { 1650000, 1800000, 0x08 },
77 { 1800000, 1950000, 0x0a },
78 { 1950000, 2150000, 0x0c },
79 { 2150000, 9999999, 0x0c },
80 { 0, 0, 0x00 }
81};
82
83
84static const char *stb6100_regnames[] = {
85 [STB6100_LD] = "LD",
86 [STB6100_VCO] = "VCO",
87 [STB6100_NI] = "NI",
88 [STB6100_NF_LSB] = "NF",
89 [STB6100_K] = "K",
90 [STB6100_G] = "G",
91 [STB6100_F] = "F",
92 [STB6100_DLB] = "DLB",
93 [STB6100_TEST1] = "TEST1",
94 [STB6100_FCCK] = "FCCK",
95 [STB6100_LPEN] = "LPEN",
96 [STB6100_TEST3] = "TEST3",
97};
98
99
100
101
102struct stb6100_regmask {
103 u8 mask;
104 u8 set;
105};
106
107static const struct stb6100_regmask stb6100_template[] = {
108 [STB6100_LD] = { 0xff, 0x00 },
109 [STB6100_VCO] = { 0xff, 0x00 },
110 [STB6100_NI] = { 0xff, 0x00 },
111 [STB6100_NF_LSB] = { 0xff, 0x00 },
112 [STB6100_K] = { 0xc7, 0x38 },
113 [STB6100_G] = { 0xef, 0x10 },
114 [STB6100_F] = { 0x1f, 0xc0 },
115 [STB6100_DLB] = { 0x38, 0xc4 },
116 [STB6100_TEST1] = { 0x00, 0x8f },
117 [STB6100_FCCK] = { 0x40, 0x0d },
118 [STB6100_LPEN] = { 0xf0, 0x0b },
119 [STB6100_TEST3] = { 0x00, 0xde },
120};
121
122
123
124
125static inline void stb6100_normalise_regs(u8 regs[])
126{
127 int i;
128
129 for (i = 0; i < STB6100_NUMREGS; i++)
130 regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set;
131}
132
133static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
134{
135 int rc;
136 struct i2c_msg msg = {
137 .addr = state->config->tuner_address,
138 .flags = I2C_M_RD,
139 .buf = regs,
140 .len = STB6100_NUMREGS
141 };
142
143 rc = i2c_transfer(state->i2c, &msg, 1);
144 if (unlikely(rc != 1)) {
145 dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
146 state->config->tuner_address, rc);
147
148 return -EREMOTEIO;
149 }
150 if (unlikely(verbose > FE_DEBUG)) {
151 int i;
152
153 dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
154 for (i = 0; i < STB6100_NUMREGS; i++)
155 dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[i], regs[i]);
156 }
157 return 0;
158}
159
160static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
161{
162 u8 regs[STB6100_NUMREGS];
163
164 struct i2c_msg msg = {
165 .addr = state->config->tuner_address + reg,
166 .flags = I2C_M_RD,
167 .buf = regs,
168 .len = 1
169 };
170
171 i2c_transfer(state->i2c, &msg, 1);
172
173 if (unlikely(reg >= STB6100_NUMREGS)) {
174 dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
175 return -EINVAL;
176 }
177 if (unlikely(verbose > FE_DEBUG)) {
178 dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
179 dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[reg], regs[0]);
180 }
181
182 return (unsigned int)regs[0];
183}
184
185static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
186{
187 int rc;
188 u8 cmdbuf[MAX_XFER_SIZE];
189 struct i2c_msg msg = {
190 .addr = state->config->tuner_address,
191 .flags = 0,
192 .buf = cmdbuf,
193 .len = len + 1
194 };
195
196 if (1 + len > sizeof(cmdbuf)) {
197 printk(KERN_WARNING
198 "%s: i2c wr: len=%d is too big!\n",
199 KBUILD_MODNAME, len);
200 return -EINVAL;
201 }
202
203 if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) {
204 dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
205 start, len);
206 return -EINVAL;
207 }
208 memcpy(&cmdbuf[1], buf, len);
209 cmdbuf[0] = start;
210
211 if (unlikely(verbose > FE_DEBUG)) {
212 int i;
213
214 dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
215 for (i = 0; i < len; i++)
216 dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
217 }
218 rc = i2c_transfer(state->i2c, &msg, 1);
219 if (unlikely(rc != 1)) {
220 dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
221 (unsigned int)state->config->tuner_address, start, len, rc);
222 return -EREMOTEIO;
223 }
224 return 0;
225}
226
227static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
228{
229 if (unlikely(reg >= STB6100_NUMREGS)) {
230 dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
231 return -EREMOTEIO;
232 }
233 data = (data & stb6100_template[reg].mask) | stb6100_template[reg].set;
234 return stb6100_write_reg_range(state, &data, reg, 1);
235}
236
237
238static int stb6100_get_status(struct dvb_frontend *fe, u32 *status)
239{
240 int rc;
241 struct stb6100_state *state = fe->tuner_priv;
242
243 rc = stb6100_read_reg(state, STB6100_LD);
244 if (rc < 0) {
245 dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
246 return rc;
247 }
248 return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
249}
250
251static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
252{
253 int rc;
254 u8 f;
255 u32 bw;
256 struct stb6100_state *state = fe->tuner_priv;
257
258 rc = stb6100_read_reg(state, STB6100_F);
259 if (rc < 0)
260 return rc;
261 f = rc & STB6100_F_F;
262
263 bw = (f + 5) * 2000;
264
265 *bandwidth = state->bandwidth = bw * 1000;
266 dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
267 return 0;
268}
269
270static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
271{
272 u32 tmp;
273 int rc;
274 struct stb6100_state *state = fe->tuner_priv;
275
276 dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);
277
278 bandwidth /= 2;
279
280 if (bandwidth >= 36000000)
281 tmp = 31;
282 else if (bandwidth <= 5000000)
283 tmp = 0;
284 else
285 tmp = (bandwidth + 500000) / 1000000 - 5;
286
287
288
289
290 rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK);
291 if (rc < 0)
292 return rc;
293 rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp);
294 if (rc < 0)
295 return rc;
296
297 msleep(5);
298
299 rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
300 if (rc < 0)
301 return rc;
302
303 msleep(10);
304
305 return 0;
306}
307
308static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
309{
310 int rc;
311 u32 nint, nfrac, fvco;
312 int psd2, odiv;
313 struct stb6100_state *state = fe->tuner_priv;
314 u8 regs[STB6100_NUMREGS];
315
316 rc = stb6100_read_regs(state, regs);
317 if (rc < 0)
318 return rc;
319
320 odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
321 psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
322 nint = regs[STB6100_NI];
323 nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB];
324 fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
325 *frequency = state->frequency = fvco >> (odiv + 1);
326
327 dprintk(verbose, FE_DEBUG, 1,
328 "frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
329 state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac);
330 return 0;
331}
332
333
334static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
335{
336 int rc;
337 const struct stb6100_lkup *ptr;
338 struct stb6100_state *state = fe->tuner_priv;
339 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
340
341 u32 srate = 0, fvco, nint, nfrac;
342 u8 regs[STB6100_NUMREGS];
343 u8 g, psd2, odiv;
344
345 dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");
346
347 if (fe->ops.get_frontend) {
348 dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
349 fe->ops.get_frontend(fe, p);
350 }
351 srate = p->symbol_rate;
352
353
354 rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d | STB6100_FCCK_FCCK);
355 if (rc < 0)
356 return rc;
357
358
359 regs[STB6100_LPEN] = 0xeb;
360 rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
361 if (rc < 0)
362 return rc;
363
364
365
366
367 if (frequency <= 1075000)
368 odiv = 1;
369 else
370 odiv = 0;
371
372
373 regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT);
374
375
376 for (ptr = lkup;
377 (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
378 ptr++);
379
380 if (ptr->val_high == 0) {
381 printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
382 return -EINVAL;
383 }
384 regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg;
385 rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
386 if (rc < 0)
387 return rc;
388
389 if ((frequency > 1075000) && (frequency <= 1325000))
390 psd2 = 0;
391 else
392 psd2 = 1;
393
394 fvco = frequency << (1 + odiv);
395
396 nint = fvco / (state->reference << psd2);
397
398 nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
399 << (9 - psd2), state->reference);
400
401
402 regs[STB6100_NI] = nint;
403 rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
404 if (rc < 0)
405 return rc;
406
407
408 regs[STB6100_NF_LSB] = nfrac;
409 rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
410 if (rc < 0)
411 return rc;
412
413
414 regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT);
415 regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB);
416 rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
417 if (rc < 0)
418 return rc;
419
420
421 if (srate >= 15000000)
422 g = 9;
423 else if (srate >= 5000000)
424 g = 11;
425 else
426 g = 14;
427
428 regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g;
429 regs[STB6100_G] &= ~STB6100_G_GCT;
430 regs[STB6100_G] |= (1 << 5);
431 rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
432 if (rc < 0)
433 return rc;
434
435
436
437
438 regs[STB6100_DLB] = 0xcc;
439 rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
440 if (rc < 0)
441 return rc;
442
443 dprintk(verbose, FE_DEBUG, 1,
444 "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
445 frequency, srate, (unsigned int)g, (unsigned int)odiv,
446 (unsigned int)psd2, state->reference,
447 ptr->reg, fvco, nint, nfrac);
448
449
450 regs[STB6100_TEST1] = 0x8f;
451 rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
452 if (rc < 0)
453 return rc;
454 regs[STB6100_TEST3] = 0xde;
455 rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
456 if (rc < 0)
457 return rc;
458
459
460 regs[STB6100_LPEN] = 0xfb;
461 rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
462 if (rc < 0)
463 return rc;
464
465 msleep(2);
466
467
468 regs[STB6100_VCO] &= ~STB6100_VCO_OCK;
469 rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
470 if (rc < 0)
471 return rc;
472
473 msleep(10);
474
475 regs[STB6100_VCO] &= ~STB6100_VCO_OSCH;
476 regs[STB6100_VCO] |= STB6100_VCO_OCK;
477 rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
478 if (rc < 0)
479 return rc;
480
481 rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
482 if (rc < 0)
483 return rc;
484
485 msleep(10);
486
487 return 0;
488}
489
490static int stb6100_sleep(struct dvb_frontend *fe)
491{
492
493 return 0;
494}
495
496static int stb6100_init(struct dvb_frontend *fe)
497{
498 struct stb6100_state *state = fe->tuner_priv;
499 int refclk = 27000000;
500
501
502
503
504
505 state->bandwidth = 36000000;
506 state->reference = refclk / 1000;
507
508
509 return 0;
510}
511
512static int stb6100_set_params(struct dvb_frontend *fe)
513{
514 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
515
516 if (c->frequency > 0)
517 stb6100_set_frequency(fe, c->frequency);
518
519 if (c->bandwidth_hz > 0)
520 stb6100_set_bandwidth(fe, c->bandwidth_hz);
521
522 return 0;
523}
524
525static struct dvb_tuner_ops stb6100_ops = {
526 .info = {
527 .name = "STB6100 Silicon Tuner",
528 .frequency_min = 950000,
529 .frequency_max = 2150000,
530 .frequency_step = 0,
531 },
532
533 .init = stb6100_init,
534 .sleep = stb6100_sleep,
535 .get_status = stb6100_get_status,
536 .set_params = stb6100_set_params,
537 .get_frequency = stb6100_get_frequency,
538 .get_bandwidth = stb6100_get_bandwidth,
539 .release = stb6100_release
540};
541
542struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
543 const struct stb6100_config *config,
544 struct i2c_adapter *i2c)
545{
546 struct stb6100_state *state = NULL;
547
548 state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
549 if (!state)
550 return NULL;
551
552 state->config = config;
553 state->i2c = i2c;
554 state->frontend = fe;
555 state->reference = config->refclock / 1000;
556 fe->tuner_priv = state;
557 fe->ops.tuner_ops = stb6100_ops;
558
559 printk("%s: Attaching STB6100 \n", __func__);
560 return fe;
561}
562
563static int stb6100_release(struct dvb_frontend *fe)
564{
565 struct stb6100_state *state = fe->tuner_priv;
566
567 fe->tuner_priv = NULL;
568 kfree(state);
569
570 return 0;
571}
572
573EXPORT_SYMBOL(stb6100_attach);
574MODULE_PARM_DESC(verbose, "Set Verbosity level");
575
576MODULE_AUTHOR("Manu Abraham");
577MODULE_DESCRIPTION("STB6100 Silicon tuner");
578MODULE_LICENSE("GPL");
579
