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");