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11#include <linux/init.h>
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/slab.h>
15#include <linux/string.h>
16
17#include <media/dvb_frontend.h>
18
19#include "stv6110x_reg.h"
20#include "stv6110x.h"
21#include "stv6110x_priv.h"
22
23
24#define MAX_XFER_SIZE 64
25
26static unsigned int verbose;
27module_param(verbose, int, 0644);
28MODULE_PARM_DESC(verbose, "Set Verbosity level");
29
30static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data)
31{
32 int ret;
33 const struct stv6110x_config *config = stv6110x->config;
34 u8 b0[] = { reg };
35 u8 b1[] = { 0 };
36 struct i2c_msg msg[] = {
37 { .addr = config->addr, .flags = 0, .buf = b0, .len = 1 },
38 { .addr = config->addr, .flags = I2C_M_RD, .buf = b1, .len = 1 }
39 };
40
41 ret = i2c_transfer(stv6110x->i2c, msg, 2);
42 if (ret != 2) {
43 dprintk(FE_ERROR, 1, "I/O Error");
44 return -EREMOTEIO;
45 }
46 *data = b1[0];
47
48 return 0;
49}
50
51static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 data[], int len)
52{
53 int ret;
54 const struct stv6110x_config *config = stv6110x->config;
55 u8 buf[MAX_XFER_SIZE];
56
57 struct i2c_msg msg = {
58 .addr = config->addr,
59 .flags = 0,
60 .buf = buf,
61 .len = len + 1
62 };
63
64 if (1 + len > sizeof(buf)) {
65 printk(KERN_WARNING
66 "%s: i2c wr: len=%d is too big!\n",
67 KBUILD_MODNAME, len);
68 return -EINVAL;
69 }
70
71 if (start + len > 8)
72 return -EINVAL;
73
74 buf[0] = start;
75 memcpy(&buf[1], data, len);
76
77 ret = i2c_transfer(stv6110x->i2c, &msg, 1);
78 if (ret != 1) {
79 dprintk(FE_ERROR, 1, "I/O Error");
80 return -EREMOTEIO;
81 }
82
83 return 0;
84}
85
86static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
87{
88 u8 tmp = data;
89
90 return stv6110x_write_regs(stv6110x, reg, &tmp, 1);
91}
92
93static int stv6110x_init(struct dvb_frontend *fe)
94{
95 struct stv6110x_state *stv6110x = fe->tuner_priv;
96 int ret;
97
98 ret = stv6110x_write_regs(stv6110x, 0, stv6110x->regs,
99 ARRAY_SIZE(stv6110x->regs));
100 if (ret < 0) {
101 dprintk(FE_ERROR, 1, "Initialization failed");
102 return -1;
103 }
104
105 return 0;
106}
107
108static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
109{
110 struct stv6110x_state *stv6110x = fe->tuner_priv;
111 u32 rDiv, divider;
112 s32 pVal, pCalc, rDivOpt = 0, pCalcOpt = 1000;
113 u8 i;
114
115 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));
116
117 if (frequency <= 1023000) {
118 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
119 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
120 pVal = 40;
121 } else if (frequency <= 1300000) {
122 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
123 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
124 pVal = 40;
125 } else if (frequency <= 2046000) {
126 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
127 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
128 pVal = 20;
129 } else {
130 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
131 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
132 pVal = 20;
133 }
134
135 for (rDiv = 0; rDiv <= 3; rDiv++) {
136 pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);
137
138 if ((abs((s32)(pCalc - pVal))) < (abs((s32)(pCalcOpt - pVal))))
139 rDivOpt = rDiv;
140
141 pCalcOpt = (REFCLOCK_kHz / 100) / R_DIV(rDivOpt);
142 }
143
144 divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
145 divider = (divider + 5) / 10;
146
147 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_R_DIV, rDivOpt);
148 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_N_DIV_11_8, MSB(divider));
149 STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG0], TNG0_N_DIV_7_0, LSB(divider));
150
151
152 STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);
153
154 stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
155 stv6110x_write_reg(stv6110x, STV6110x_TNG1, stv6110x->regs[STV6110x_TNG1]);
156 stv6110x_write_reg(stv6110x, STV6110x_TNG0, stv6110x->regs[STV6110x_TNG0]);
157 stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
158
159 for (i = 0; i < TRIALS; i++) {
160 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
161 if (!STV6110x_GETFIELD(STAT1_CALVCO_STRT, stv6110x->regs[STV6110x_STAT1]))
162 break;
163 msleep(1);
164 }
165
166 return 0;
167}
168
169static int stv6110x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
170{
171 struct stv6110x_state *stv6110x = fe->tuner_priv;
172
173 stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x->regs[STV6110x_TNG1]);
174 stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x->regs[STV6110x_TNG0]);
175
176 *frequency = (MAKEWORD16(STV6110x_GETFIELD(TNG1_N_DIV_11_8, stv6110x->regs[STV6110x_TNG1]),
177 STV6110x_GETFIELD(TNG0_N_DIV_7_0, stv6110x->regs[STV6110x_TNG0]))) * REFCLOCK_kHz;
178
179 *frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x->regs[STV6110x_TNG1]) +
180 STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x->regs[STV6110x_TNG1])));
181
182 *frequency >>= 2;
183
184 return 0;
185}
186
187static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
188{
189 struct stv6110x_state *stv6110x = fe->tuner_priv;
190 u32 halfbw;
191 u8 i;
192
193 halfbw = bandwidth >> 1;
194
195 if (halfbw > 36000000)
196 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 31);
197 else if (halfbw < 5000000)
198 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 0);
199 else
200 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5));
201
202
203 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0);
204 STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1);
205
206 stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
207 stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
208
209 for (i = 0; i < TRIALS; i++) {
210 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
211 if (!STV6110x_GETFIELD(STAT1_CALRC_STRT, stv6110x->regs[STV6110x_STAT1]))
212 break;
213 msleep(1);
214 }
215 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1);
216 stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
217
218 return 0;
219}
220
221static int stv6110x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
222{
223 struct stv6110x_state *stv6110x = fe->tuner_priv;
224
225 stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x->regs[STV6110x_CTRL3]);
226 *bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x->regs[STV6110x_CTRL3]) + 5) * 2000000;
227
228 return 0;
229}
230
231static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
232{
233 struct stv6110x_state *stv6110x = fe->tuner_priv;
234
235
236 switch (refclock) {
237 default:
238 case 1:
239 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
240 break;
241 case 2:
242 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
243 break;
244 case 4:
245 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
246 break;
247 case 8:
248 case 0:
249 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
250 break;
251 }
252 stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
253
254 return 0;
255}
256
257static int stv6110x_get_bbgain(struct dvb_frontend *fe, u32 *gain)
258{
259 struct stv6110x_state *stv6110x = fe->tuner_priv;
260
261 stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x->regs[STV6110x_CTRL2]);
262 *gain = 2 * STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x->regs[STV6110x_CTRL2]);
263
264 return 0;
265}
266
267static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
268{
269 struct stv6110x_state *stv6110x = fe->tuner_priv;
270
271 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
272 stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
273
274 return 0;
275}
276
277static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
278{
279 struct stv6110x_state *stv6110x = fe->tuner_priv;
280 int ret;
281
282 switch (mode) {
283 case TUNER_SLEEP:
284 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 0);
285 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 0);
286 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 0);
287 break;
288
289 case TUNER_WAKE:
290 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 1);
291 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 1);
292 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 1);
293 break;
294 }
295
296 ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
297 if (ret < 0) {
298 dprintk(FE_ERROR, 1, "I/O Error");
299 return -EIO;
300 }
301
302 return 0;
303}
304
305static int stv6110x_sleep(struct dvb_frontend *fe)
306{
307 if (fe->tuner_priv)
308 return stv6110x_set_mode(fe, TUNER_SLEEP);
309
310 return 0;
311}
312
313static int stv6110x_get_status(struct dvb_frontend *fe, u32 *status)
314{
315 struct stv6110x_state *stv6110x = fe->tuner_priv;
316
317 stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
318
319 if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x->regs[STV6110x_STAT1]))
320 *status = TUNER_PHASELOCKED;
321 else
322 *status = 0;
323
324 return 0;
325}
326
327
328static void stv6110x_release(struct dvb_frontend *fe)
329{
330 struct stv6110x_state *stv6110x = fe->tuner_priv;
331
332 fe->tuner_priv = NULL;
333 kfree(stv6110x);
334}
335
336static const struct dvb_tuner_ops stv6110x_ops = {
337 .info = {
338 .name = "STV6110(A) Silicon Tuner",
339 .frequency_min_hz = 950 * MHz,
340 .frequency_max_hz = 2150 * MHz,
341 },
342 .release = stv6110x_release
343};
344
345static const struct stv6110x_devctl stv6110x_ctl = {
346 .tuner_init = stv6110x_init,
347 .tuner_sleep = stv6110x_sleep,
348 .tuner_set_mode = stv6110x_set_mode,
349 .tuner_set_frequency = stv6110x_set_frequency,
350 .tuner_get_frequency = stv6110x_get_frequency,
351 .tuner_set_bandwidth = stv6110x_set_bandwidth,
352 .tuner_get_bandwidth = stv6110x_get_bandwidth,
353 .tuner_set_bbgain = stv6110x_set_bbgain,
354 .tuner_get_bbgain = stv6110x_get_bbgain,
355 .tuner_set_refclk = stv6110x_set_refclock,
356 .tuner_get_status = stv6110x_get_status,
357};
358
359const struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
360 const struct stv6110x_config *config,
361 struct i2c_adapter *i2c)
362{
363 struct stv6110x_state *stv6110x;
364 u8 default_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};
365
366 stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
367 if (!stv6110x)
368 return NULL;
369
370 stv6110x->i2c = i2c;
371 stv6110x->config = config;
372 stv6110x->devctl = &stv6110x_ctl;
373 memcpy(stv6110x->regs, default_regs, 8);
374
375
376 switch (stv6110x->config->clk_div) {
377 default:
378 case 1:
379 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
380 break;
381 case 2:
382 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
383 break;
384 case 4:
385 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
386 break;
387 case 8:
388 case 0:
389 STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
390 break;
391 }
392
393 fe->tuner_priv = stv6110x;
394 fe->ops.tuner_ops = stv6110x_ops;
395
396 printk(KERN_INFO "%s: Attaching STV6110x\n", __func__);
397 return stv6110x->devctl;
398}
399EXPORT_SYMBOL(stv6110x_attach);
400
401MODULE_AUTHOR("Manu Abraham");
402MODULE_DESCRIPTION("STV6110x Silicon tuner");
403MODULE_LICENSE("GPL");
404
