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21#include <linux/slab.h>
22#include <linux/module.h>
23#include <linux/dvb/frontend.h>
24
25#include <linux/types.h>
26
27#include "stv6110.h"
28
29
30#define MAX_XFER_SIZE 64
31
32static int debug;
33
34struct stv6110_priv {
35 int i2c_address;
36 struct i2c_adapter *i2c;
37
38 u32 mclk;
39 u8 clk_div;
40 u8 gain;
41 u8 regs[8];
42};
43
44#define dprintk(args...) \
45 do { \
46 if (debug) \
47 printk(KERN_DEBUG args); \
48 } while (0)
49
50static s32 abssub(s32 a, s32 b)
51{
52 if (a > b)
53 return a - b;
54 else
55 return b - a;
56};
57
58static void stv6110_release(struct dvb_frontend *fe)
59{
60 kfree(fe->tuner_priv);
61 fe->tuner_priv = NULL;
62}
63
64static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
65 int start, int len)
66{
67 struct stv6110_priv *priv = fe->tuner_priv;
68 int rc;
69 u8 cmdbuf[MAX_XFER_SIZE];
70 struct i2c_msg msg = {
71 .addr = priv->i2c_address,
72 .flags = 0,
73 .buf = cmdbuf,
74 .len = len + 1
75 };
76
77 dprintk("%s\n", __func__);
78
79 if (1 + len > sizeof(cmdbuf)) {
80 printk(KERN_WARNING
81 "%s: i2c wr: len=%d is too big!\n",
82 KBUILD_MODNAME, len);
83 return -EINVAL;
84 }
85
86 if (start + len > 8)
87 return -EINVAL;
88
89 memcpy(&cmdbuf[1], buf, len);
90 cmdbuf[0] = start;
91
92 if (fe->ops.i2c_gate_ctrl)
93 fe->ops.i2c_gate_ctrl(fe, 1);
94
95 rc = i2c_transfer(priv->i2c, &msg, 1);
96 if (rc != 1)
97 dprintk("%s: i2c error\n", __func__);
98
99 if (fe->ops.i2c_gate_ctrl)
100 fe->ops.i2c_gate_ctrl(fe, 0);
101
102 return 0;
103}
104
105static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
106 int start, int len)
107{
108 struct stv6110_priv *priv = fe->tuner_priv;
109 int rc;
110 u8 reg[] = { start };
111 struct i2c_msg msg[] = {
112 {
113 .addr = priv->i2c_address,
114 .flags = 0,
115 .buf = reg,
116 .len = 1,
117 }, {
118 .addr = priv->i2c_address,
119 .flags = I2C_M_RD,
120 .buf = regs,
121 .len = len,
122 },
123 };
124
125 if (fe->ops.i2c_gate_ctrl)
126 fe->ops.i2c_gate_ctrl(fe, 1);
127
128 rc = i2c_transfer(priv->i2c, msg, 2);
129 if (rc != 2)
130 dprintk("%s: i2c error\n", __func__);
131
132 if (fe->ops.i2c_gate_ctrl)
133 fe->ops.i2c_gate_ctrl(fe, 0);
134
135 memcpy(&priv->regs[start], regs, len);
136
137 return 0;
138}
139
140static int stv6110_read_reg(struct dvb_frontend *fe, int start)
141{
142 u8 buf[] = { 0 };
143 stv6110_read_regs(fe, buf, start, 1);
144
145 return buf[0];
146}
147
148static int stv6110_sleep(struct dvb_frontend *fe)
149{
150 u8 reg[] = { 0 };
151 stv6110_write_regs(fe, reg, 0, 1);
152
153 return 0;
154}
155
156static u32 carrier_width(u32 symbol_rate, enum fe_rolloff rolloff)
157{
158 u32 rlf;
159
160 switch (rolloff) {
161 case ROLLOFF_20:
162 rlf = 20;
163 break;
164 case ROLLOFF_25:
165 rlf = 25;
166 break;
167 default:
168 rlf = 35;
169 break;
170 }
171
172 return symbol_rate + ((symbol_rate * rlf) / 100);
173}
174
175static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
176{
177 struct stv6110_priv *priv = fe->tuner_priv;
178 u8 r8, ret = 0x04;
179 int i;
180
181 if ((bandwidth / 2) > 36000000)
182 r8 = 31;
183 else if ((bandwidth / 2) < 5000000)
184 r8 = 0;
185 else
186 r8 = (bandwidth / 2) / 1000000 - 5;
187
188
189
190 priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) | 0x1f);
191 priv->regs[RSTV6110_CTRL3] |= (r8 & 0x1f);
192 stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
193
194 priv->regs[RSTV6110_STAT1] |= 0x02;
195 stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);
196
197 i = 0;
198
199 while ((i < 10) && (ret != 0)) {
200 ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
201 mdelay(1);
202 i++;
203 }
204
205
206 priv->regs[RSTV6110_CTRL3] |= (1 << 6);
207 stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
208 return 0;
209}
210
211static int stv6110_init(struct dvb_frontend *fe)
212{
213 struct stv6110_priv *priv = fe->tuner_priv;
214 u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
215
216 memcpy(priv->regs, buf0, 8);
217
218 priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
219 priv->regs[RSTV6110_CTRL1] |=
220 ((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
221
222
223 priv->regs[RSTV6110_CTRL2] &= ~0xc0;
224 priv->regs[RSTV6110_CTRL2] |= (priv->clk_div << 6);
225
226 stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
227 msleep(1);
228 stv6110_set_bandwidth(fe, 72000000);
229
230 return 0;
231}
232
233static int stv6110_get_frequency(struct dvb_frontend *fe, u32 *frequency)
234{
235 struct stv6110_priv *priv = fe->tuner_priv;
236 u32 nbsteps, divider, psd2, freq;
237 u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
238
239 stv6110_read_regs(fe, regs, 0, 8);
240
241 divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
242 divider += priv->regs[RSTV6110_TUNING1];
243
244
245 nbsteps = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
246
247 psd2 = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;
248
249 freq = divider * (priv->mclk / 1000);
250 freq /= (1 << (nbsteps + psd2));
251 freq /= 4;
252
253 *frequency = freq;
254
255 return 0;
256}
257
258static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
259{
260 struct stv6110_priv *priv = fe->tuner_priv;
261 u8 ret = 0x04;
262 u32 divider, ref, p, presc, i, result_freq, vco_freq;
263 s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
264
265 dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
266 frequency, priv->mclk);
267
268
269 priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
270 priv->regs[RSTV6110_CTRL1] |=
271 ((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
272
273
274 priv->regs[RSTV6110_CTRL2] &= ~0x0f;
275 priv->regs[RSTV6110_CTRL2] |= (priv->gain & 0x0f);
276
277 if (frequency <= 1023000) {
278 p = 1;
279 presc = 0;
280 } else if (frequency <= 1300000) {
281 p = 1;
282 presc = 1;
283 } else if (frequency <= 2046000) {
284 p = 0;
285 presc = 0;
286 } else {
287 p = 0;
288 presc = 1;
289 }
290
291 priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
292 priv->regs[RSTV6110_TUNING2] |= (p << 4);
293
294
295 priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
296 priv->regs[RSTV6110_TUNING2] |= (presc << 5);
297
298 p_val = (int)(1 << (p + 1)) * 10;
299 for (r_div = 0; r_div <= 3; r_div++) {
300 p_calc = (priv->mclk / 100000);
301 p_calc /= (1 << (r_div + 1));
302 if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
303 r_div_opt = r_div;
304
305 p_calc_opt = (priv->mclk / 100000);
306 p_calc_opt /= (1 << (r_div_opt + 1));
307 }
308
309 ref = priv->mclk / ((1 << (r_div_opt + 1)) * (1 << (p + 1)));
310 divider = (((frequency * 1000) + (ref >> 1)) / ref);
311
312
313 priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
314 priv->regs[RSTV6110_TUNING2] |= (((r_div_opt) & 3) << 6);
315
316
317 priv->regs[RSTV6110_TUNING2] &= ~0x0f;
318 priv->regs[RSTV6110_TUNING2] |= (((divider) >> 8) & 0x0f);
319
320
321 priv->regs[RSTV6110_TUNING1] = (divider & 0xff);
322
323
324 priv->regs[RSTV6110_STAT1] |= 0x04;
325 stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
326 RSTV6110_CTRL1, 8);
327
328 i = 0;
329
330 while ((i < 10) && (ret != 0)) {
331 ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
332 msleep(1);
333 i++;
334 }
335
336 ret = stv6110_read_reg(fe, RSTV6110_STAT1);
337 stv6110_get_frequency(fe, &result_freq);
338
339 vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
340 dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
341 ret, result_freq, vco_freq);
342
343 return 0;
344}
345
346static int stv6110_set_params(struct dvb_frontend *fe)
347{
348 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
349 u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);
350
351 stv6110_set_frequency(fe, c->frequency);
352 stv6110_set_bandwidth(fe, bandwidth);
353
354 return 0;
355}
356
357static int stv6110_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
358{
359 struct stv6110_priv *priv = fe->tuner_priv;
360 u8 r8 = 0;
361 u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
362 stv6110_read_regs(fe, regs, 0, 8);
363
364
365 r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
366 *bandwidth = (r8 + 5) * 2000000;
367
368 return 0;
369}
370
371static const struct dvb_tuner_ops stv6110_tuner_ops = {
372 .info = {
373 .name = "ST STV6110",
374 .frequency_min_hz = 950 * MHz,
375 .frequency_max_hz = 2150 * MHz,
376 .frequency_step_hz = 1 * MHz,
377 },
378 .init = stv6110_init,
379 .release = stv6110_release,
380 .sleep = stv6110_sleep,
381 .set_params = stv6110_set_params,
382 .get_frequency = stv6110_get_frequency,
383 .set_frequency = stv6110_set_frequency,
384 .get_bandwidth = stv6110_get_bandwidth,
385 .set_bandwidth = stv6110_set_bandwidth,
386
387};
388
389struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe,
390 const struct stv6110_config *config,
391 struct i2c_adapter *i2c)
392{
393 struct stv6110_priv *priv = NULL;
394 u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
395
396 struct i2c_msg msg[] = {
397 {
398 .addr = config->i2c_address,
399 .flags = 0,
400 .buf = reg0,
401 .len = 9
402 }
403 };
404 int ret;
405
406
407 reg0[2] &= ~0xc0;
408 reg0[2] |= (config->clk_div << 6);
409
410 if (fe->ops.i2c_gate_ctrl)
411 fe->ops.i2c_gate_ctrl(fe, 1);
412
413 ret = i2c_transfer(i2c, msg, 1);
414
415 if (fe->ops.i2c_gate_ctrl)
416 fe->ops.i2c_gate_ctrl(fe, 0);
417
418 if (ret != 1)
419 return NULL;
420
421 priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
422 if (priv == NULL)
423 return NULL;
424
425 priv->i2c_address = config->i2c_address;
426 priv->i2c = i2c;
427 priv->mclk = config->mclk;
428 priv->clk_div = config->clk_div;
429 priv->gain = config->gain;
430
431 memcpy(&priv->regs, ®0[1], 8);
432
433 memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
434 sizeof(struct dvb_tuner_ops));
435 fe->tuner_priv = priv;
436 printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);
437
438 return fe;
439}
440EXPORT_SYMBOL(stv6110_attach);
441
442module_param(debug, int, 0644);
443MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
444
445MODULE_DESCRIPTION("ST STV6110 driver");
446MODULE_AUTHOR("Igor M. Liplianin");
447MODULE_LICENSE("GPL");
448
