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23#include <linux/init.h>
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/slab.h>
27#include <linux/string.h>
28
29#include "dvb_frontend.h"
30
31#include "stv6110x_reg.h"
32#include "stv6110x.h"
33#include "stv6110x_priv.h"
34
35static unsigned int verbose;
36module_param(verbose, int, 0644);
37MODULE_PARM_DESC(verbose, "Set Verbosity level");
38
39static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data)
40{
41 int ret;
42 const struct stv6110x_config *config = stv6110x->config;
43 u8 b0[] = { reg };
44 u8 b1[] = { 0 };
45 struct i2c_msg msg[] = {
46 { .addr = config->addr, .flags = 0, .buf = b0, .len = 1 },
47 { .addr = config->addr, .flags = I2C_M_RD, .buf = b1, .len = 1 }
48 };
49
50 ret = i2c_transfer(stv6110x->i2c, msg, 2);
51 if (ret != 2) {
52 dprintk(FE_ERROR, 1, "I/O Error");
53 return -EREMOTEIO;
54 }
55 *data = b1[0];
56
57 return 0;
58}
59
60static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 data[], int len)
61{
62 int ret;
63 const struct stv6110x_config *config = stv6110x->config;
64 u8 buf[len + 1];
65 struct i2c_msg msg = {
66 .addr = config->addr,
67 .flags = 0,
68 .buf = buf,
69 .len = len + 1
70 };
71
72 if (start + len > 8)
73 return -EINVAL;
74
75 buf[0] = start;
76 memcpy(&buf[1], data, len);
77
78 ret = i2c_transfer(stv6110x->i2c, &msg, 1);
79 if (ret != 1) {
80 dprintk(FE_ERROR, 1, "I/O Error");
81 return -EREMOTEIO;
82 }
83
84 return 0;
85}
86
87static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
88{
89 return stv6110x_write_regs(stv6110x, reg, &data, 1);
90}
91
92static int stv6110x_init(struct dvb_frontend *fe)
93{
94 struct stv6110x_state *stv6110x = fe->tuner_priv;
95 int ret;
96
97 ret = stv6110x_write_regs(stv6110x, 0, stv6110x->regs,
98 ARRAY_SIZE(stv6110x->regs));
99 if (ret < 0) {
100 dprintk(FE_ERROR, 1, "Initialization failed");
101 return -1;
102 }
103
104 return 0;
105}
106
107static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
108{
109 struct stv6110x_state *stv6110x = fe->tuner_priv;
110 u32 rDiv, divider;
111 s32 pVal, pCalc, rDivOpt = 0, pCalcOpt = 1000;
112 u8 i;
113
114 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));
115
116 if (frequency <= 1023000) {
117 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
118 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
119 pVal = 40;
120 } else if (frequency <= 1300000) {
121 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
122 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
123 pVal = 40;
124 } else if (frequency <= 2046000) {
125 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
126 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
127 pVal = 20;
128 } else {
129 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
130 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
131 pVal = 20;
132 }
133
134 for (rDiv = 0; rDiv <= 3; rDiv++) {
135 pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);
136
137 if ((abs((s32)(pCalc - pVal))) < (abs((s32)(pCalcOpt - pVal))))
138 rDivOpt = rDiv;
139
140 pCalcOpt = (REFCLOCK_kHz / 100) / R_DIV(rDivOpt);
141 }
142
143 divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
144 divider = (divider + 5) / 10;
145
146 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_R_DIV, rDivOpt);
147 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_N_DIV_11_8, MSB(divider));
148 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG0], TNG0_N_DIV_7_0, LSB(divider));
149
150
151 STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);
152
153 stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
154 stv6110x_write_reg(stv6110x, STV6110x_TNG1, stv6110x->regs[STV6110x_TNG1]);
155 stv6110x_write_reg(stv6110x, STV6110x_TNG0, stv6110x->regs[STV6110x_TNG0]);
156 stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
157
158 for (i = 0; i < TRIALS; i++) {
159 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
160 if (!STV6110x_GETFIELD(STAT1_CALVCO_STRT, stv6110x->regs[STV6110x_STAT1]))
161 break;
162 msleep(1);
163 }
164
165 return 0;
166}
167
168static int stv6110x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
169{
170 struct stv6110x_state *stv6110x = fe->tuner_priv;
171
172 stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x->regs[STV6110x_TNG1]);
173 stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x->regs[STV6110x_TNG0]);
174
175 *frequency = (MAKEWORD16(STV6110x_GETFIELD(TNG1_N_DIV_11_8, stv6110x->regs[STV6110x_TNG1]),
176 STV6110x_GETFIELD(TNG0_N_DIV_7_0, stv6110x->regs[STV6110x_TNG0]))) * REFCLOCK_kHz;
177
178 *frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x->regs[STV6110x_TNG1]) +
179 STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x->regs[STV6110x_TNG1])));
180
181 *frequency >>= 2;
182
183 return 0;
184}
185
186static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
187{
188 struct stv6110x_state *stv6110x = fe->tuner_priv;
189 u32 halfbw;
190 u8 i;
191
192 halfbw = bandwidth >> 1;
193
194 if (halfbw > 36000000)
195 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 31);
196 else if (halfbw < 5000000)
197 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 0);
198 else
199 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5));
200
201
202 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0);
203 STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1);
204
205 stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
206 stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
207
208 for (i = 0; i < TRIALS; i++) {
209 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
210 if (!STV6110x_GETFIELD(STAT1_CALRC_STRT, stv6110x->regs[STV6110x_STAT1]))
211 break;
212 msleep(1);
213 }
214 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1);
215 stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
216
217 return 0;
218}
219
220static int stv6110x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
221{
222 struct stv6110x_state *stv6110x = fe->tuner_priv;
223
224 stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x->regs[STV6110x_CTRL3]);
225 *bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x->regs[STV6110x_CTRL3]) + 5) * 2000000;
226
227 return 0;
228}
229
230static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
231{
232 struct stv6110x_state *stv6110x = fe->tuner_priv;
233
234
235 switch (refclock) {
236 default:
237 case 1:
238 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
239 break;
240 case 2:
241 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
242 break;
243 case 4:
244 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
245 break;
246 case 8:
247 case 0:
248 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
249 break;
250 }
251 stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
252
253 return 0;
254}
255
256static int stv6110x_get_bbgain(struct dvb_frontend *fe, u32 *gain)
257{
258 struct stv6110x_state *stv6110x = fe->tuner_priv;
259
260 stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x->regs[STV6110x_CTRL2]);
261 *gain = 2 * STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x->regs[STV6110x_CTRL2]);
262
263 return 0;
264}
265
266static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
267{
268 struct stv6110x_state *stv6110x = fe->tuner_priv;
269
270 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
271 stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
272
273 return 0;
274}
275
276static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
277{
278 struct stv6110x_state *stv6110x = fe->tuner_priv;
279 int ret;
280
281 switch (mode) {
282 case TUNER_SLEEP:
283 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 0);
284 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 0);
285 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 0);
286 break;
287
288 case TUNER_WAKE:
289 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 1);
290 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 1);
291 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 1);
292 break;
293 }
294
295 ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
296 if (ret < 0) {
297 dprintk(FE_ERROR, 1, "I/O Error");
298 return -EIO;
299 }
300
301 return 0;
302}
303
304static int stv6110x_sleep(struct dvb_frontend *fe)
305{
306 if (fe->tuner_priv)
307 return stv6110x_set_mode(fe, TUNER_SLEEP);
308
309 return 0;
310}
311
312static int stv6110x_get_status(struct dvb_frontend *fe, u32 *status)
313{
314 struct stv6110x_state *stv6110x = fe->tuner_priv;
315
316 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
317
318 if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x->regs[STV6110x_STAT1]))
319 *status = TUNER_PHASELOCKED;
320 else
321 *status = 0;
322
323 return 0;
324}
325
326
327static int stv6110x_release(struct dvb_frontend *fe)
328{
329 struct stv6110x_state *stv6110x = fe->tuner_priv;
330
331 fe->tuner_priv = NULL;
332 kfree(stv6110x);
333
334 return 0;
335}
336
337static struct dvb_tuner_ops stv6110x_ops = {
338 .info = {
339 .name = "STV6110(A) Silicon Tuner",
340 .frequency_min = 950000,
341 .frequency_max = 2150000,
342 .frequency_step = 0,
343 },
344 .release = stv6110x_release
345};
346
347static struct stv6110x_devctl stv6110x_ctl = {
348 .tuner_init = stv6110x_init,
349 .tuner_sleep = stv6110x_sleep,
350 .tuner_set_mode = stv6110x_set_mode,
351 .tuner_set_frequency = stv6110x_set_frequency,
352 .tuner_get_frequency = stv6110x_get_frequency,
353 .tuner_set_bandwidth = stv6110x_set_bandwidth,
354 .tuner_get_bandwidth = stv6110x_get_bandwidth,
355 .tuner_set_bbgain = stv6110x_set_bbgain,
356 .tuner_get_bbgain = stv6110x_get_bbgain,
357 .tuner_set_refclk = stv6110x_set_refclock,
358 .tuner_get_status = stv6110x_get_status,
359};
360
361struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
362 const struct stv6110x_config *config,
363 struct i2c_adapter *i2c)
364{
365 struct stv6110x_state *stv6110x;
366 u8 default_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};
367
368 stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
369 if (!stv6110x)
370 return NULL;
371
372 stv6110x->i2c = i2c;
373 stv6110x->config = config;
374 stv6110x->devctl = &stv6110x_ctl;
375 memcpy(stv6110x->regs, default_regs, 8);
376
377
378 switch (stv6110x->config->clk_div) {
379 default:
380 case 1:
381 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
382 break;
383 case 2:
384 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
385 break;
386 case 4:
387 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
388 break;
389 case 8:
390 case 0:
391 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
392 break;
393 }
394
395 fe->tuner_priv = stv6110x;
396 fe->ops.tuner_ops = stv6110x_ops;
397
398 printk(KERN_INFO "%s: Attaching STV6110x\n", __func__);
399 return stv6110x->devctl;
400}
401EXPORT_SYMBOL(stv6110x_attach);
402
403MODULE_AUTHOR("Manu Abraham");
404MODULE_DESCRIPTION("STV6110x Silicon tuner");
405MODULE_LICENSE("GPL");
406
