Commit | Line | Data |
---|---|---|
c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
47220bc1 IL |
2 | /* |
3 | * stv6110.c | |
4 | * | |
5 | * Driver for ST STV6110 satellite tuner IC. | |
6 | * | |
7 | * Copyright (C) 2009 NetUP Inc. | |
8 | * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> | |
47220bc1 IL |
9 | */ |
10 | ||
5a0e3ad6 | 11 | #include <linux/slab.h> |
47220bc1 IL |
12 | #include <linux/module.h> |
13 | #include <linux/dvb/frontend.h> | |
14 | ||
15 | #include <linux/types.h> | |
16 | ||
17 | #include "stv6110.h" | |
18 | ||
8393796d MCC |
19 | /* Max transfer size done by I2C transfer functions */ |
20 | #define MAX_XFER_SIZE 64 | |
21 | ||
47220bc1 IL |
22 | static int debug; |
23 | ||
24 | struct stv6110_priv { | |
25 | int i2c_address; | |
26 | struct i2c_adapter *i2c; | |
27 | ||
28 | u32 mclk; | |
92782bb0 | 29 | u8 clk_div; |
873688cd | 30 | u8 gain; |
47220bc1 IL |
31 | u8 regs[8]; |
32 | }; | |
33 | ||
34 | #define dprintk(args...) \ | |
35 | do { \ | |
36 | if (debug) \ | |
37 | printk(KERN_DEBUG args); \ | |
38 | } while (0) | |
39 | ||
40 | static s32 abssub(s32 a, s32 b) | |
41 | { | |
42 | if (a > b) | |
43 | return a - b; | |
44 | else | |
45 | return b - a; | |
46 | }; | |
47 | ||
f2709c20 MCC |
48 | static void stv6110_release(struct dvb_frontend *fe) |
49 | { | |
50 | kfree(fe->tuner_priv); | |
51 | fe->tuner_priv = NULL; | |
52 | } | |
53 | ||
47220bc1 IL |
54 | static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[], |
55 | int start, int len) | |
56 | { | |
57 | struct stv6110_priv *priv = fe->tuner_priv; | |
58 | int rc; | |
8393796d | 59 | u8 cmdbuf[MAX_XFER_SIZE]; |
47220bc1 IL |
60 | struct i2c_msg msg = { |
61 | .addr = priv->i2c_address, | |
62 | .flags = 0, | |
63 | .buf = cmdbuf, | |
64 | .len = len + 1 | |
65 | }; | |
66 | ||
67 | dprintk("%s\n", __func__); | |
68 | ||
8393796d MCC |
69 | if (1 + len > sizeof(cmdbuf)) { |
70 | printk(KERN_WARNING | |
71 | "%s: i2c wr: len=%d is too big!\n", | |
72 | KBUILD_MODNAME, len); | |
73 | return -EINVAL; | |
74 | } | |
75 | ||
47220bc1 IL |
76 | if (start + len > 8) |
77 | return -EINVAL; | |
78 | ||
79 | memcpy(&cmdbuf[1], buf, len); | |
80 | cmdbuf[0] = start; | |
81 | ||
82 | if (fe->ops.i2c_gate_ctrl) | |
83 | fe->ops.i2c_gate_ctrl(fe, 1); | |
84 | ||
85 | rc = i2c_transfer(priv->i2c, &msg, 1); | |
86 | if (rc != 1) | |
87 | dprintk("%s: i2c error\n", __func__); | |
88 | ||
89 | if (fe->ops.i2c_gate_ctrl) | |
90 | fe->ops.i2c_gate_ctrl(fe, 0); | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[], | |
96 | int start, int len) | |
97 | { | |
98 | struct stv6110_priv *priv = fe->tuner_priv; | |
99 | int rc; | |
100 | u8 reg[] = { start }; | |
c8461210 IL |
101 | struct i2c_msg msg[] = { |
102 | { | |
103 | .addr = priv->i2c_address, | |
104 | .flags = 0, | |
105 | .buf = reg, | |
106 | .len = 1, | |
107 | }, { | |
108 | .addr = priv->i2c_address, | |
109 | .flags = I2C_M_RD, | |
110 | .buf = regs, | |
111 | .len = len, | |
112 | }, | |
47220bc1 IL |
113 | }; |
114 | ||
47220bc1 IL |
115 | if (fe->ops.i2c_gate_ctrl) |
116 | fe->ops.i2c_gate_ctrl(fe, 1); | |
117 | ||
c8461210 IL |
118 | rc = i2c_transfer(priv->i2c, msg, 2); |
119 | if (rc != 2) | |
47220bc1 IL |
120 | dprintk("%s: i2c error\n", __func__); |
121 | ||
122 | if (fe->ops.i2c_gate_ctrl) | |
123 | fe->ops.i2c_gate_ctrl(fe, 0); | |
124 | ||
125 | memcpy(&priv->regs[start], regs, len); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int stv6110_read_reg(struct dvb_frontend *fe, int start) | |
131 | { | |
132 | u8 buf[] = { 0 }; | |
133 | stv6110_read_regs(fe, buf, start, 1); | |
134 | ||
135 | return buf[0]; | |
136 | } | |
137 | ||
138 | static int stv6110_sleep(struct dvb_frontend *fe) | |
139 | { | |
140 | u8 reg[] = { 0 }; | |
141 | stv6110_write_regs(fe, reg, 0, 1); | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
0df289a2 | 146 | static u32 carrier_width(u32 symbol_rate, enum fe_rolloff rolloff) |
47220bc1 IL |
147 | { |
148 | u32 rlf; | |
149 | ||
150 | switch (rolloff) { | |
151 | case ROLLOFF_20: | |
152 | rlf = 20; | |
153 | break; | |
154 | case ROLLOFF_25: | |
155 | rlf = 25; | |
156 | break; | |
157 | default: | |
158 | rlf = 35; | |
159 | break; | |
160 | } | |
161 | ||
162 | return symbol_rate + ((symbol_rate * rlf) / 100); | |
163 | } | |
164 | ||
165 | static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth) | |
166 | { | |
167 | struct stv6110_priv *priv = fe->tuner_priv; | |
168 | u8 r8, ret = 0x04; | |
169 | int i; | |
170 | ||
171 | if ((bandwidth / 2) > 36000000) /*BW/2 max=31+5=36 mhz for r8=31*/ | |
172 | r8 = 31; | |
173 | else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */ | |
174 | r8 = 0; | |
175 | else /*if 5 < BW/2 < 36*/ | |
176 | r8 = (bandwidth / 2) / 1000000 - 5; | |
177 | ||
178 | /* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */ | |
179 | /* ctrl3, CF = r8 Set the LPF value */ | |
180 | priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) | 0x1f); | |
181 | priv->regs[RSTV6110_CTRL3] |= (r8 & 0x1f); | |
182 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1); | |
183 | /* stat1, CALRCSTRT = 1 Start LPF auto calibration*/ | |
184 | priv->regs[RSTV6110_STAT1] |= 0x02; | |
185 | stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1); | |
186 | ||
187 | i = 0; | |
188 | /* Wait for CALRCSTRT == 0 */ | |
189 | while ((i < 10) && (ret != 0)) { | |
190 | ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02); | |
191 | mdelay(1); /* wait for LPF auto calibration */ | |
192 | i++; | |
193 | } | |
194 | ||
868c9a17 | 195 | /* RCCLKOFF = 1 calibration done, deactivate the calibration Clock */ |
47220bc1 IL |
196 | priv->regs[RSTV6110_CTRL3] |= (1 << 6); |
197 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1); | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static int stv6110_init(struct dvb_frontend *fe) | |
202 | { | |
203 | struct stv6110_priv *priv = fe->tuner_priv; | |
204 | u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e }; | |
205 | ||
206 | memcpy(priv->regs, buf0, 8); | |
207 | /* K = (Reference / 1000000) - 16 */ | |
208 | priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3); | |
209 | priv->regs[RSTV6110_CTRL1] |= | |
210 | ((((priv->mclk / 1000000) - 16) & 0x1f) << 3); | |
211 | ||
92782bb0 IL |
212 | /* divisor value for the output clock */ |
213 | priv->regs[RSTV6110_CTRL2] &= ~0xc0; | |
214 | priv->regs[RSTV6110_CTRL2] |= (priv->clk_div << 6); | |
215 | ||
47220bc1 IL |
216 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8); |
217 | msleep(1); | |
218 | stv6110_set_bandwidth(fe, 72000000); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static int stv6110_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
224 | { | |
225 | struct stv6110_priv *priv = fe->tuner_priv; | |
226 | u32 nbsteps, divider, psd2, freq; | |
227 | u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
228 | ||
229 | stv6110_read_regs(fe, regs, 0, 8); | |
230 | /*N*/ | |
231 | divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8; | |
232 | divider += priv->regs[RSTV6110_TUNING1]; | |
233 | ||
234 | /*R*/ | |
235 | nbsteps = (priv->regs[RSTV6110_TUNING2] >> 6) & 3; | |
236 | /*p*/ | |
237 | psd2 = (priv->regs[RSTV6110_TUNING2] >> 4) & 1; | |
238 | ||
239 | freq = divider * (priv->mclk / 1000); | |
240 | freq /= (1 << (nbsteps + psd2)); | |
241 | freq /= 4; | |
242 | ||
243 | *frequency = freq; | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency) | |
249 | { | |
250 | struct stv6110_priv *priv = fe->tuner_priv; | |
47220bc1 IL |
251 | u8 ret = 0x04; |
252 | u32 divider, ref, p, presc, i, result_freq, vco_freq; | |
253 | s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val; | |
47220bc1 IL |
254 | |
255 | dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__, | |
256 | frequency, priv->mclk); | |
257 | ||
258 | /* K = (Reference / 1000000) - 16 */ | |
259 | priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3); | |
260 | priv->regs[RSTV6110_CTRL1] |= | |
261 | ((((priv->mclk / 1000000) - 16) & 0x1f) << 3); | |
262 | ||
263 | /* BB_GAIN = db/2 */ | |
47220bc1 | 264 | priv->regs[RSTV6110_CTRL2] &= ~0x0f; |
873688cd | 265 | priv->regs[RSTV6110_CTRL2] |= (priv->gain & 0x0f); |
47220bc1 IL |
266 | |
267 | if (frequency <= 1023000) { | |
268 | p = 1; | |
269 | presc = 0; | |
270 | } else if (frequency <= 1300000) { | |
271 | p = 1; | |
272 | presc = 1; | |
273 | } else if (frequency <= 2046000) { | |
274 | p = 0; | |
275 | presc = 0; | |
276 | } else { | |
277 | p = 0; | |
278 | presc = 1; | |
279 | } | |
280 | /* DIV4SEL = p*/ | |
281 | priv->regs[RSTV6110_TUNING2] &= ~(1 << 4); | |
282 | priv->regs[RSTV6110_TUNING2] |= (p << 4); | |
283 | ||
284 | /* PRESC32ON = presc */ | |
285 | priv->regs[RSTV6110_TUNING2] &= ~(1 << 5); | |
286 | priv->regs[RSTV6110_TUNING2] |= (presc << 5); | |
287 | ||
288 | p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */ | |
289 | for (r_div = 0; r_div <= 3; r_div++) { | |
290 | p_calc = (priv->mclk / 100000); | |
291 | p_calc /= (1 << (r_div + 1)); | |
292 | if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val))) | |
293 | r_div_opt = r_div; | |
294 | ||
295 | p_calc_opt = (priv->mclk / 100000); | |
296 | p_calc_opt /= (1 << (r_div_opt + 1)); | |
297 | } | |
298 | ||
299 | ref = priv->mclk / ((1 << (r_div_opt + 1)) * (1 << (p + 1))); | |
300 | divider = (((frequency * 1000) + (ref >> 1)) / ref); | |
301 | ||
302 | /* RDIV = r_div_opt */ | |
303 | priv->regs[RSTV6110_TUNING2] &= ~(3 << 6); | |
304 | priv->regs[RSTV6110_TUNING2] |= (((r_div_opt) & 3) << 6); | |
305 | ||
306 | /* NDIV_MSB = MSB(divider) */ | |
307 | priv->regs[RSTV6110_TUNING2] &= ~0x0f; | |
308 | priv->regs[RSTV6110_TUNING2] |= (((divider) >> 8) & 0x0f); | |
309 | ||
310 | /* NDIV_LSB, LSB(divider) */ | |
311 | priv->regs[RSTV6110_TUNING1] = (divider & 0xff); | |
312 | ||
313 | /* CALVCOSTRT = 1 VCO Auto Calibration */ | |
314 | priv->regs[RSTV6110_STAT1] |= 0x04; | |
315 | stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], | |
316 | RSTV6110_CTRL1, 8); | |
317 | ||
318 | i = 0; | |
319 | /* Wait for CALVCOSTRT == 0 */ | |
320 | while ((i < 10) && (ret != 0)) { | |
321 | ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04); | |
322 | msleep(1); /* wait for VCO auto calibration */ | |
323 | i++; | |
324 | } | |
325 | ||
326 | ret = stv6110_read_reg(fe, RSTV6110_STAT1); | |
327 | stv6110_get_frequency(fe, &result_freq); | |
328 | ||
329 | vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1)))); | |
330 | dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__, | |
331 | ret, result_freq, vco_freq); | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
14d24d14 | 336 | static int stv6110_set_params(struct dvb_frontend *fe) |
47220bc1 IL |
337 | { |
338 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
339 | u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff); | |
340 | ||
341 | stv6110_set_frequency(fe, c->frequency); | |
342 | stv6110_set_bandwidth(fe, bandwidth); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static int stv6110_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) | |
348 | { | |
349 | struct stv6110_priv *priv = fe->tuner_priv; | |
350 | u8 r8 = 0; | |
351 | u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; | |
352 | stv6110_read_regs(fe, regs, 0, 8); | |
353 | ||
354 | /* CF */ | |
355 | r8 = priv->regs[RSTV6110_CTRL3] & 0x1f; | |
356 | *bandwidth = (r8 + 5) * 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */ | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
14c4bf3c | 361 | static const struct dvb_tuner_ops stv6110_tuner_ops = { |
47220bc1 IL |
362 | .info = { |
363 | .name = "ST STV6110", | |
a3f90c75 MCC |
364 | .frequency_min_hz = 950 * MHz, |
365 | .frequency_max_hz = 2150 * MHz, | |
366 | .frequency_step_hz = 1 * MHz, | |
47220bc1 IL |
367 | }, |
368 | .init = stv6110_init, | |
f2709c20 | 369 | .release = stv6110_release, |
47220bc1 IL |
370 | .sleep = stv6110_sleep, |
371 | .set_params = stv6110_set_params, | |
372 | .get_frequency = stv6110_get_frequency, | |
373 | .set_frequency = stv6110_set_frequency, | |
374 | .get_bandwidth = stv6110_get_bandwidth, | |
375 | .set_bandwidth = stv6110_set_bandwidth, | |
376 | ||
377 | }; | |
378 | ||
379 | struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe, | |
380 | const struct stv6110_config *config, | |
381 | struct i2c_adapter *i2c) | |
382 | { | |
383 | struct stv6110_priv *priv = NULL; | |
384 | u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e }; | |
385 | ||
386 | struct i2c_msg msg[] = { | |
387 | { | |
388 | .addr = config->i2c_address, | |
389 | .flags = 0, | |
390 | .buf = reg0, | |
391 | .len = 9 | |
392 | } | |
393 | }; | |
394 | int ret; | |
395 | ||
92782bb0 IL |
396 | /* divisor value for the output clock */ |
397 | reg0[2] &= ~0xc0; | |
398 | reg0[2] |= (config->clk_div << 6); | |
399 | ||
47220bc1 IL |
400 | if (fe->ops.i2c_gate_ctrl) |
401 | fe->ops.i2c_gate_ctrl(fe, 1); | |
402 | ||
403 | ret = i2c_transfer(i2c, msg, 1); | |
404 | ||
405 | if (fe->ops.i2c_gate_ctrl) | |
406 | fe->ops.i2c_gate_ctrl(fe, 0); | |
407 | ||
408 | if (ret != 1) | |
409 | return NULL; | |
410 | ||
411 | priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL); | |
412 | if (priv == NULL) | |
413 | return NULL; | |
414 | ||
415 | priv->i2c_address = config->i2c_address; | |
416 | priv->i2c = i2c; | |
417 | priv->mclk = config->mclk; | |
92782bb0 | 418 | priv->clk_div = config->clk_div; |
873688cd | 419 | priv->gain = config->gain; |
47220bc1 IL |
420 | |
421 | memcpy(&priv->regs, ®0[1], 8); | |
422 | ||
423 | memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops, | |
424 | sizeof(struct dvb_tuner_ops)); | |
425 | fe->tuner_priv = priv; | |
426 | printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address); | |
427 | ||
428 | return fe; | |
429 | } | |
430 | EXPORT_SYMBOL(stv6110_attach); | |
431 | ||
432 | module_param(debug, int, 0644); | |
433 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); | |
434 | ||
435 | MODULE_DESCRIPTION("ST STV6110 driver"); | |
436 | MODULE_AUTHOR("Igor M. Liplianin"); | |
437 | MODULE_LICENSE("GPL"); |