2
STV6110(A) Silicon tuner driver
4
Copyright (C) Manu Abraham <abraham.manu@gmail.com>
6
Copyright (C) ST Microelectronics
8
This program is free software; you can redistribute it and/or modify
9
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation; either version 2 of the License, or
11
(at your option) any later version.
13
This program is distributed in the hope that it will be useful,
14
but WITHOUT ANY WARRANTY; without even the implied warranty of
15
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
GNU General Public License for more details.
18
You should have received a copy of the GNU General Public License
19
along with this program; if not, write to the Free Software
20
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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>
29
#include "dvb_frontend.h"
31
#include "stv6110x_reg.h"
33
#include "stv6110x_priv.h"
35
static unsigned int verbose;
36
module_param(verbose, int, 0644);
37
MODULE_PARM_DESC(verbose, "Set Verbosity level");
39
static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data)
42
const struct stv6110x_config *config = stv6110x->config;
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 }
50
ret = i2c_transfer(stv6110x->i2c, msg, 2);
52
dprintk(FE_ERROR, 1, "I/O Error");
60
static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 data[], int len)
63
const struct stv6110x_config *config = stv6110x->config;
65
struct i2c_msg msg = {
76
memcpy(&buf[1], data, len);
78
ret = i2c_transfer(stv6110x->i2c, &msg, 1);
80
dprintk(FE_ERROR, 1, "I/O Error");
87
static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
89
return stv6110x_write_regs(stv6110x, reg, &data, 1);
92
static int stv6110x_init(struct dvb_frontend *fe)
94
struct stv6110x_state *stv6110x = fe->tuner_priv;
97
ret = stv6110x_write_regs(stv6110x, 0, stv6110x->regs,
98
ARRAY_SIZE(stv6110x->regs));
100
dprintk(FE_ERROR, 1, "Initialization failed");
107
static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
109
struct stv6110x_state *stv6110x = fe->tuner_priv;
111
s32 pVal, pCalc, rDivOpt = 0, pCalcOpt = 1000;
114
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));
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);
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);
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);
129
STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
130
STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
134
for (rDiv = 0; rDiv <= 3; rDiv++) {
135
pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);
137
if ((abs((s32)(pCalc - pVal))) < (abs((s32)(pCalcOpt - pVal))))
140
pCalcOpt = (REFCLOCK_kHz / 100) / R_DIV(rDivOpt);
143
divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
144
divider = (divider + 5) / 10;
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));
150
/* VCO Auto calibration */
151
STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);
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]);
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]))
168
static int stv6110x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
170
struct stv6110x_state *stv6110x = fe->tuner_priv;
172
stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x->regs[STV6110x_TNG1]);
173
stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x->regs[STV6110x_TNG0]);
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;
178
*frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x->regs[STV6110x_TNG1]) +
179
STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x->regs[STV6110x_TNG1])));
186
static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
188
struct stv6110x_state *stv6110x = fe->tuner_priv;
192
halfbw = bandwidth >> 1;
194
if (halfbw > 36000000)
195
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 31); /* LPF */
196
else if (halfbw < 5000000)
197
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 0); /* LPF */
199
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5)); /* LPF */
202
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0); /* cal. clk activated */
203
STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1); /* LPF auto cal */
205
stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
206
stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
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]))
214
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1); /* cal. done */
215
stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
220
static int stv6110x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
222
struct stv6110x_state *stv6110x = fe->tuner_priv;
224
stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x->regs[STV6110x_CTRL3]);
225
*bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x->regs[STV6110x_CTRL3]) + 5) * 2000000;
230
static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
232
struct stv6110x_state *stv6110x = fe->tuner_priv;
238
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
241
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
244
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
248
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
251
stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
256
static int stv6110x_get_bbgain(struct dvb_frontend *fe, u32 *gain)
258
struct stv6110x_state *stv6110x = fe->tuner_priv;
260
stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x->regs[STV6110x_CTRL2]);
261
*gain = 2 * STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x->regs[STV6110x_CTRL2]);
266
static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
268
struct stv6110x_state *stv6110x = fe->tuner_priv;
270
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
271
stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
276
static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
278
struct stv6110x_state *stv6110x = fe->tuner_priv;
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);
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);
295
ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
297
dprintk(FE_ERROR, 1, "I/O Error");
304
static int stv6110x_sleep(struct dvb_frontend *fe)
307
return stv6110x_set_mode(fe, TUNER_SLEEP);
312
static int stv6110x_get_status(struct dvb_frontend *fe, u32 *status)
314
struct stv6110x_state *stv6110x = fe->tuner_priv;
316
stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
318
if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x->regs[STV6110x_STAT1]))
319
*status = TUNER_PHASELOCKED;
327
static int stv6110x_release(struct dvb_frontend *fe)
329
struct stv6110x_state *stv6110x = fe->tuner_priv;
331
fe->tuner_priv = NULL;
337
static struct dvb_tuner_ops stv6110x_ops = {
339
.name = "STV6110(A) Silicon Tuner",
340
.frequency_min = 950000,
341
.frequency_max = 2150000,
344
.release = stv6110x_release
347
static 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,
361
struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
362
const struct stv6110x_config *config,
363
struct i2c_adapter *i2c)
365
struct stv6110x_state *stv6110x;
366
u8 default_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};
368
stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
373
stv6110x->config = config;
374
stv6110x->devctl = &stv6110x_ctl;
375
memcpy(stv6110x->regs, default_regs, 8);
378
switch (stv6110x->config->clk_div) {
381
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
384
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
387
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
391
STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
395
fe->tuner_priv = stv6110x;
396
fe->ops.tuner_ops = stv6110x_ops;
398
printk(KERN_INFO "%s: Attaching STV6110x\n", __func__);
399
return stv6110x->devctl;
401
EXPORT_SYMBOL(stv6110x_attach);
403
MODULE_AUTHOR("Manu Abraham");
404
MODULE_DESCRIPTION("STV6110x Silicon tuner");
405
MODULE_LICENSE("GPL");