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47220bc1 IL |
1 | /* |
2 | * stv6110.c | |
3 | * | |
4 | * Driver for ST STV6110 satellite tuner IC. | |
5 | * | |
6 | * Copyright (C) 2009 NetUP Inc. | |
7 | * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> | |
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 | * | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
5a0e3ad6 | 25 | #include <linux/slab.h> |
47220bc1 IL |
26 | #include <linux/module.h> |
27 | #include <linux/dvb/frontend.h> | |
28 | ||
29 | #include <linux/types.h> | |
30 | ||
31 | #include "stv6110.h" | |
32 | ||
33 | static int debug; | |
34 | ||
35 | struct stv6110_priv { | |
36 | int i2c_address; | |
37 | struct i2c_adapter *i2c; | |
38 | ||
39 | u32 mclk; | |
92782bb0 | 40 | u8 clk_div; |
873688cd | 41 | u8 gain; |
47220bc1 IL |
42 | u8 regs[8]; |
43 | }; | |
44 | ||
45 | #define dprintk(args...) \ | |
46 | do { \ | |
47 | if (debug) \ | |
48 | printk(KERN_DEBUG args); \ | |
49 | } while (0) | |
50 | ||
51 | static s32 abssub(s32 a, s32 b) | |
52 | { | |
53 | if (a > b) | |
54 | return a - b; | |
55 | else | |
56 | return b - a; | |
57 | }; | |
58 | ||
59 | static int stv6110_release(struct dvb_frontend *fe) | |
60 | { | |
61 | kfree(fe->tuner_priv); | |
62 | fe->tuner_priv = NULL; | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[], | |
67 | int start, int len) | |
68 | { | |
69 | struct stv6110_priv *priv = fe->tuner_priv; | |
70 | int rc; | |
71 | u8 cmdbuf[len + 1]; | |
72 | struct i2c_msg msg = { | |
73 | .addr = priv->i2c_address, | |
74 | .flags = 0, | |
75 | .buf = cmdbuf, | |
76 | .len = len + 1 | |
77 | }; | |
78 | ||
79 | dprintk("%s\n", __func__); | |
80 | ||
81 | if (start + len > 8) | |
82 | return -EINVAL; | |
83 | ||
84 | memcpy(&cmdbuf[1], buf, len); | |
85 | cmdbuf[0] = start; | |
86 | ||
87 | if (fe->ops.i2c_gate_ctrl) | |
88 | fe->ops.i2c_gate_ctrl(fe, 1); | |
89 | ||
90 | rc = i2c_transfer(priv->i2c, &msg, 1); | |
91 | if (rc != 1) | |
92 | dprintk("%s: i2c error\n", __func__); | |
93 | ||
94 | if (fe->ops.i2c_gate_ctrl) | |
95 | fe->ops.i2c_gate_ctrl(fe, 0); | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
100 | static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[], | |
101 | int start, int len) | |
102 | { | |
103 | struct stv6110_priv *priv = fe->tuner_priv; | |
104 | int rc; | |
105 | u8 reg[] = { start }; | |
c8461210 IL |
106 | struct i2c_msg msg[] = { |
107 | { | |
108 | .addr = priv->i2c_address, | |
109 | .flags = 0, | |
110 | .buf = reg, | |
111 | .len = 1, | |
112 | }, { | |
113 | .addr = priv->i2c_address, | |
114 | .flags = I2C_M_RD, | |
115 | .buf = regs, | |
116 | .len = len, | |
117 | }, | |
47220bc1 IL |
118 | }; |
119 | ||
47220bc1 IL |
120 | if (fe->ops.i2c_gate_ctrl) |
121 | fe->ops.i2c_gate_ctrl(fe, 1); | |
122 | ||
c8461210 IL |
123 | rc = i2c_transfer(priv->i2c, msg, 2); |
124 | if (rc != 2) | |
47220bc1 IL |
125 | dprintk("%s: i2c error\n", __func__); |
126 | ||
127 | if (fe->ops.i2c_gate_ctrl) | |
128 | fe->ops.i2c_gate_ctrl(fe, 0); | |
129 | ||
130 | memcpy(&priv->regs[start], regs, len); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int stv6110_read_reg(struct dvb_frontend *fe, int start) | |
136 | { | |
137 | u8 buf[] = { 0 }; | |
138 | stv6110_read_regs(fe, buf, start, 1); | |
139 | ||
140 | return buf[0]; | |
141 | } | |
142 | ||
143 | static int stv6110_sleep(struct dvb_frontend *fe) | |
144 | { | |
145 | u8 reg[] = { 0 }; | |
146 | stv6110_write_regs(fe, reg, 0, 1); | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static u32 carrier_width(u32 symbol_rate, fe_rolloff_t rolloff) | |
152 | { | |
153 | u32 rlf; | |
154 | ||
155 | switch (rolloff) { | |
156 | case ROLLOFF_20: | |
157 | rlf = 20; | |
158 | break; | |
159 | case ROLLOFF_25: | |
160 | rlf = 25; | |
161 | break; | |
162 | default: | |
163 | rlf = 35; | |
164 | break; | |
165 | } | |
166 | ||
167 | return symbol_rate + ((symbol_rate * rlf) / 100); | |
168 | } | |
169 | ||
170 | static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth) | |
171 | { | |
172 | struct stv6110_priv *priv = fe->tuner_priv; | |
173 | u8 r8, ret = 0x04; | |
174 | int i; | |
175 | ||
176 | if ((bandwidth / 2) > 36000000) /*BW/2 max=31+5=36 mhz for r8=31*/ | |
177 | r8 = 31; | |
178 | else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */ | |
179 | r8 = 0; | |
180 | else /*if 5 < BW/2 < 36*/ | |
181 | r8 = (bandwidth / 2) / 1000000 - 5; | |
182 | ||
183 | /* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */ | |
184 | /* ctrl3, CF = r8 Set the LPF value */ | |
185 | priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) | 0x1f); | |
186 | priv->regs[RSTV6110_CTRL3] |= (r8 & 0x1f); | |
187 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1); | |
188 | /* stat1, CALRCSTRT = 1 Start LPF auto calibration*/ | |
189 | priv->regs[RSTV6110_STAT1] |= 0x02; | |
190 | stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1); | |
191 | ||
192 | i = 0; | |
193 | /* Wait for CALRCSTRT == 0 */ | |
194 | while ((i < 10) && (ret != 0)) { | |
195 | ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02); | |
196 | mdelay(1); /* wait for LPF auto calibration */ | |
197 | i++; | |
198 | } | |
199 | ||
200 | /* RCCLKOFF = 1 calibration done, desactivate the calibration Clock */ | |
201 | priv->regs[RSTV6110_CTRL3] |= (1 << 6); | |
202 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1); | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static int stv6110_init(struct dvb_frontend *fe) | |
207 | { | |
208 | struct stv6110_priv *priv = fe->tuner_priv; | |
209 | u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e }; | |
210 | ||
211 | memcpy(priv->regs, buf0, 8); | |
212 | /* K = (Reference / 1000000) - 16 */ | |
213 | priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3); | |
214 | priv->regs[RSTV6110_CTRL1] |= | |
215 | ((((priv->mclk / 1000000) - 16) & 0x1f) << 3); | |
216 | ||
92782bb0 IL |
217 | /* divisor value for the output clock */ |
218 | priv->regs[RSTV6110_CTRL2] &= ~0xc0; | |
219 | priv->regs[RSTV6110_CTRL2] |= (priv->clk_div << 6); | |
220 | ||
47220bc1 IL |
221 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8); |
222 | msleep(1); | |
223 | stv6110_set_bandwidth(fe, 72000000); | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static int stv6110_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
229 | { | |
230 | struct stv6110_priv *priv = fe->tuner_priv; | |
231 | u32 nbsteps, divider, psd2, freq; | |
232 | u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
233 | ||
234 | stv6110_read_regs(fe, regs, 0, 8); | |
235 | /*N*/ | |
236 | divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8; | |
237 | divider += priv->regs[RSTV6110_TUNING1]; | |
238 | ||
239 | /*R*/ | |
240 | nbsteps = (priv->regs[RSTV6110_TUNING2] >> 6) & 3; | |
241 | /*p*/ | |
242 | psd2 = (priv->regs[RSTV6110_TUNING2] >> 4) & 1; | |
243 | ||
244 | freq = divider * (priv->mclk / 1000); | |
245 | freq /= (1 << (nbsteps + psd2)); | |
246 | freq /= 4; | |
247 | ||
248 | *frequency = freq; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency) | |
254 | { | |
255 | struct stv6110_priv *priv = fe->tuner_priv; | |
256 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
257 | u8 ret = 0x04; | |
258 | u32 divider, ref, p, presc, i, result_freq, vco_freq; | |
259 | s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val; | |
873688cd | 260 | s32 srate; |
47220bc1 IL |
261 | |
262 | dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__, | |
263 | frequency, priv->mclk); | |
264 | ||
265 | /* K = (Reference / 1000000) - 16 */ | |
266 | priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3); | |
267 | priv->regs[RSTV6110_CTRL1] |= | |
268 | ((((priv->mclk / 1000000) - 16) & 0x1f) << 3); | |
269 | ||
270 | /* BB_GAIN = db/2 */ | |
271 | if (fe->ops.set_property && fe->ops.get_property) { | |
272 | srate = c->symbol_rate; | |
273 | dprintk("%s: Get Frontend parameters: srate=%d\n", | |
274 | __func__, srate); | |
275 | } else | |
276 | srate = 15000000; | |
277 | ||
47220bc1 | 278 | priv->regs[RSTV6110_CTRL2] &= ~0x0f; |
873688cd | 279 | priv->regs[RSTV6110_CTRL2] |= (priv->gain & 0x0f); |
47220bc1 IL |
280 | |
281 | if (frequency <= 1023000) { | |
282 | p = 1; | |
283 | presc = 0; | |
284 | } else if (frequency <= 1300000) { | |
285 | p = 1; | |
286 | presc = 1; | |
287 | } else if (frequency <= 2046000) { | |
288 | p = 0; | |
289 | presc = 0; | |
290 | } else { | |
291 | p = 0; | |
292 | presc = 1; | |
293 | } | |
294 | /* DIV4SEL = p*/ | |
295 | priv->regs[RSTV6110_TUNING2] &= ~(1 << 4); | |
296 | priv->regs[RSTV6110_TUNING2] |= (p << 4); | |
297 | ||
298 | /* PRESC32ON = presc */ | |
299 | priv->regs[RSTV6110_TUNING2] &= ~(1 << 5); | |
300 | priv->regs[RSTV6110_TUNING2] |= (presc << 5); | |
301 | ||
302 | p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */ | |
303 | for (r_div = 0; r_div <= 3; r_div++) { | |
304 | p_calc = (priv->mclk / 100000); | |
305 | p_calc /= (1 << (r_div + 1)); | |
306 | if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val))) | |
307 | r_div_opt = r_div; | |
308 | ||
309 | p_calc_opt = (priv->mclk / 100000); | |
310 | p_calc_opt /= (1 << (r_div_opt + 1)); | |
311 | } | |
312 | ||
313 | ref = priv->mclk / ((1 << (r_div_opt + 1)) * (1 << (p + 1))); | |
314 | divider = (((frequency * 1000) + (ref >> 1)) / ref); | |
315 | ||
316 | /* RDIV = r_div_opt */ | |
317 | priv->regs[RSTV6110_TUNING2] &= ~(3 << 6); | |
318 | priv->regs[RSTV6110_TUNING2] |= (((r_div_opt) & 3) << 6); | |
319 | ||
320 | /* NDIV_MSB = MSB(divider) */ | |
321 | priv->regs[RSTV6110_TUNING2] &= ~0x0f; | |
322 | priv->regs[RSTV6110_TUNING2] |= (((divider) >> 8) & 0x0f); | |
323 | ||
324 | /* NDIV_LSB, LSB(divider) */ | |
325 | priv->regs[RSTV6110_TUNING1] = (divider & 0xff); | |
326 | ||
327 | /* CALVCOSTRT = 1 VCO Auto Calibration */ | |
328 | priv->regs[RSTV6110_STAT1] |= 0x04; | |
329 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], | |
330 | RSTV6110_CTRL1, 8); | |
331 | ||
332 | i = 0; | |
333 | /* Wait for CALVCOSTRT == 0 */ | |
334 | while ((i < 10) && (ret != 0)) { | |
335 | ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04); | |
336 | msleep(1); /* wait for VCO auto calibration */ | |
337 | i++; | |
338 | } | |
339 | ||
340 | ret = stv6110_read_reg(fe, RSTV6110_STAT1); | |
341 | stv6110_get_frequency(fe, &result_freq); | |
342 | ||
343 | vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1)))); | |
344 | dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__, | |
345 | ret, result_freq, vco_freq); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
14d24d14 | 350 | static int stv6110_set_params(struct dvb_frontend *fe) |
47220bc1 IL |
351 | { |
352 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
353 | u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff); | |
354 | ||
355 | stv6110_set_frequency(fe, c->frequency); | |
356 | stv6110_set_bandwidth(fe, bandwidth); | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | static int stv6110_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) | |
362 | { | |
363 | struct stv6110_priv *priv = fe->tuner_priv; | |
364 | u8 r8 = 0; | |
365 | u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
366 | stv6110_read_regs(fe, regs, 0, 8); | |
367 | ||
368 | /* CF */ | |
369 | r8 = priv->regs[RSTV6110_CTRL3] & 0x1f; | |
370 | *bandwidth = (r8 + 5) * 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */ | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
375 | static struct dvb_tuner_ops stv6110_tuner_ops = { | |
376 | .info = { | |
377 | .name = "ST STV6110", | |
378 | .frequency_min = 950000, | |
379 | .frequency_max = 2150000, | |
380 | .frequency_step = 1000, | |
381 | }, | |
382 | .init = stv6110_init, | |
383 | .release = stv6110_release, | |
384 | .sleep = stv6110_sleep, | |
385 | .set_params = stv6110_set_params, | |
386 | .get_frequency = stv6110_get_frequency, | |
387 | .set_frequency = stv6110_set_frequency, | |
388 | .get_bandwidth = stv6110_get_bandwidth, | |
389 | .set_bandwidth = stv6110_set_bandwidth, | |
390 | ||
391 | }; | |
392 | ||
393 | struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe, | |
394 | const struct stv6110_config *config, | |
395 | struct i2c_adapter *i2c) | |
396 | { | |
397 | struct stv6110_priv *priv = NULL; | |
398 | u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e }; | |
399 | ||
400 | struct i2c_msg msg[] = { | |
401 | { | |
402 | .addr = config->i2c_address, | |
403 | .flags = 0, | |
404 | .buf = reg0, | |
405 | .len = 9 | |
406 | } | |
407 | }; | |
408 | int ret; | |
409 | ||
92782bb0 IL |
410 | /* divisor value for the output clock */ |
411 | reg0[2] &= ~0xc0; | |
412 | reg0[2] |= (config->clk_div << 6); | |
413 | ||
47220bc1 IL |
414 | if (fe->ops.i2c_gate_ctrl) |
415 | fe->ops.i2c_gate_ctrl(fe, 1); | |
416 | ||
417 | ret = i2c_transfer(i2c, msg, 1); | |
418 | ||
419 | if (fe->ops.i2c_gate_ctrl) | |
420 | fe->ops.i2c_gate_ctrl(fe, 0); | |
421 | ||
422 | if (ret != 1) | |
423 | return NULL; | |
424 | ||
425 | priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL); | |
426 | if (priv == NULL) | |
427 | return NULL; | |
428 | ||
429 | priv->i2c_address = config->i2c_address; | |
430 | priv->i2c = i2c; | |
431 | priv->mclk = config->mclk; | |
92782bb0 | 432 | priv->clk_div = config->clk_div; |
873688cd | 433 | priv->gain = config->gain; |
47220bc1 IL |
434 | |
435 | memcpy(&priv->regs, ®0[1], 8); | |
436 | ||
437 | memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops, | |
438 | sizeof(struct dvb_tuner_ops)); | |
439 | fe->tuner_priv = priv; | |
440 | printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address); | |
441 | ||
442 | return fe; | |
443 | } | |
444 | EXPORT_SYMBOL(stv6110_attach); | |
445 | ||
446 | module_param(debug, int, 0644); | |
447 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); | |
448 | ||
449 | MODULE_DESCRIPTION("ST STV6110 driver"); | |
450 | MODULE_AUTHOR("Igor M. Liplianin"); | |
451 | MODULE_LICENSE("GPL"); |