123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418 |
- /*
- STV6110(A) Silicon tuner driver
- Copyright (C) Manu Abraham <abraham.manu@gmail.com>
- Copyright (C) ST Microelectronics
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- #include "dvb_frontend.h"
- #include "stv6110x_reg.h"
- #include "stv6110x.h"
- #include "stv6110x_priv.h"
- /* Max transfer size done by I2C transfer functions */
- #define MAX_XFER_SIZE 64
- static unsigned int verbose;
- module_param(verbose, int, 0644);
- MODULE_PARM_DESC(verbose, "Set Verbosity level");
- static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data)
- {
- int ret;
- const struct stv6110x_config *config = stv6110x->config;
- u8 b0[] = { reg };
- u8 b1[] = { 0 };
- struct i2c_msg msg[] = {
- { .addr = config->addr, .flags = 0, .buf = b0, .len = 1 },
- { .addr = config->addr, .flags = I2C_M_RD, .buf = b1, .len = 1 }
- };
- ret = i2c_transfer(stv6110x->i2c, msg, 2);
- if (ret != 2) {
- dprintk(FE_ERROR, 1, "I/O Error");
- return -EREMOTEIO;
- }
- *data = b1[0];
- return 0;
- }
- static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 data[], int len)
- {
- int ret;
- const struct stv6110x_config *config = stv6110x->config;
- u8 buf[MAX_XFER_SIZE];
- struct i2c_msg msg = {
- .addr = config->addr,
- .flags = 0,
- .buf = buf,
- .len = len + 1
- };
- if (1 + len > sizeof(buf)) {
- printk(KERN_WARNING
- "%s: i2c wr: len=%d is too big!\n",
- KBUILD_MODNAME, len);
- return -EINVAL;
- }
- if (start + len > 8)
- return -EINVAL;
- buf[0] = start;
- memcpy(&buf[1], data, len);
- ret = i2c_transfer(stv6110x->i2c, &msg, 1);
- if (ret != 1) {
- dprintk(FE_ERROR, 1, "I/O Error");
- return -EREMOTEIO;
- }
- return 0;
- }
- static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
- {
- u8 tmp = data; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
- return stv6110x_write_regs(stv6110x, reg, &tmp, 1);
- }
- static int stv6110x_init(struct dvb_frontend *fe)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- int ret;
- ret = stv6110x_write_regs(stv6110x, 0, stv6110x->regs,
- ARRAY_SIZE(stv6110x->regs));
- if (ret < 0) {
- dprintk(FE_ERROR, 1, "Initialization failed");
- return -1;
- }
- return 0;
- }
- static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- u32 rDiv, divider;
- s32 pVal, pCalc, rDivOpt = 0, pCalcOpt = 1000;
- u8 i;
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));
- if (frequency <= 1023000) {
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
- pVal = 40;
- } else if (frequency <= 1300000) {
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
- pVal = 40;
- } else if (frequency <= 2046000) {
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
- pVal = 20;
- } else {
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
- pVal = 20;
- }
- for (rDiv = 0; rDiv <= 3; rDiv++) {
- pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);
- if ((abs((s32)(pCalc - pVal))) < (abs((s32)(pCalcOpt - pVal))))
- rDivOpt = rDiv;
- pCalcOpt = (REFCLOCK_kHz / 100) / R_DIV(rDivOpt);
- }
- divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
- divider = (divider + 5) / 10;
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_R_DIV, rDivOpt);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_N_DIV_11_8, MSB(divider));
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG0], TNG0_N_DIV_7_0, LSB(divider));
- /* VCO Auto calibration */
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);
- stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
- stv6110x_write_reg(stv6110x, STV6110x_TNG1, stv6110x->regs[STV6110x_TNG1]);
- stv6110x_write_reg(stv6110x, STV6110x_TNG0, stv6110x->regs[STV6110x_TNG0]);
- stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
- for (i = 0; i < TRIALS; i++) {
- stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
- if (!STV6110x_GETFIELD(STAT1_CALVCO_STRT, stv6110x->regs[STV6110x_STAT1]))
- break;
- msleep(1);
- }
- return 0;
- }
- static int stv6110x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x->regs[STV6110x_TNG1]);
- stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x->regs[STV6110x_TNG0]);
- *frequency = (MAKEWORD16(STV6110x_GETFIELD(TNG1_N_DIV_11_8, stv6110x->regs[STV6110x_TNG1]),
- STV6110x_GETFIELD(TNG0_N_DIV_7_0, stv6110x->regs[STV6110x_TNG0]))) * REFCLOCK_kHz;
- *frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x->regs[STV6110x_TNG1]) +
- STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x->regs[STV6110x_TNG1])));
- *frequency >>= 2;
- return 0;
- }
- static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- u32 halfbw;
- u8 i;
- halfbw = bandwidth >> 1;
- if (halfbw > 36000000)
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 31); /* LPF */
- else if (halfbw < 5000000)
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 0); /* LPF */
- else
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5)); /* LPF */
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0); /* cal. clk activated */
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1); /* LPF auto cal */
- stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
- stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
- for (i = 0; i < TRIALS; i++) {
- stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
- if (!STV6110x_GETFIELD(STAT1_CALRC_STRT, stv6110x->regs[STV6110x_STAT1]))
- break;
- msleep(1);
- }
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1); /* cal. done */
- stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
- return 0;
- }
- static int stv6110x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x->regs[STV6110x_CTRL3]);
- *bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x->regs[STV6110x_CTRL3]) + 5) * 2000000;
- return 0;
- }
- static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- /* setup divider */
- switch (refclock) {
- default:
- case 1:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
- break;
- case 2:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
- break;
- case 4:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
- break;
- case 8:
- case 0:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
- break;
- }
- stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
- return 0;
- }
- static int stv6110x_get_bbgain(struct dvb_frontend *fe, u32 *gain)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x->regs[STV6110x_CTRL2]);
- *gain = 2 * STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x->regs[STV6110x_CTRL2]);
- return 0;
- }
- static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
- stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
- return 0;
- }
- static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- int ret;
- switch (mode) {
- case TUNER_SLEEP:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 0);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 0);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 0);
- break;
- case TUNER_WAKE:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 1);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 1);
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 1);
- break;
- }
- ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
- if (ret < 0) {
- dprintk(FE_ERROR, 1, "I/O Error");
- return -EIO;
- }
- return 0;
- }
- static int stv6110x_sleep(struct dvb_frontend *fe)
- {
- if (fe->tuner_priv)
- return stv6110x_set_mode(fe, TUNER_SLEEP);
- return 0;
- }
- static int stv6110x_get_status(struct dvb_frontend *fe, u32 *status)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
- if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x->regs[STV6110x_STAT1]))
- *status = TUNER_PHASELOCKED;
- else
- *status = 0;
- return 0;
- }
- static int stv6110x_release(struct dvb_frontend *fe)
- {
- struct stv6110x_state *stv6110x = fe->tuner_priv;
- fe->tuner_priv = NULL;
- kfree(stv6110x);
- return 0;
- }
- static struct dvb_tuner_ops stv6110x_ops = {
- .info = {
- .name = "STV6110(A) Silicon Tuner",
- .frequency_min = 950000,
- .frequency_max = 2150000,
- .frequency_step = 0,
- },
- .release = stv6110x_release
- };
- static struct stv6110x_devctl stv6110x_ctl = {
- .tuner_init = stv6110x_init,
- .tuner_sleep = stv6110x_sleep,
- .tuner_set_mode = stv6110x_set_mode,
- .tuner_set_frequency = stv6110x_set_frequency,
- .tuner_get_frequency = stv6110x_get_frequency,
- .tuner_set_bandwidth = stv6110x_set_bandwidth,
- .tuner_get_bandwidth = stv6110x_get_bandwidth,
- .tuner_set_bbgain = stv6110x_set_bbgain,
- .tuner_get_bbgain = stv6110x_get_bbgain,
- .tuner_set_refclk = stv6110x_set_refclock,
- .tuner_get_status = stv6110x_get_status,
- };
- struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
- const struct stv6110x_config *config,
- struct i2c_adapter *i2c)
- {
- struct stv6110x_state *stv6110x;
- u8 default_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};
- stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
- if (!stv6110x)
- return NULL;
- stv6110x->i2c = i2c;
- stv6110x->config = config;
- stv6110x->devctl = &stv6110x_ctl;
- memcpy(stv6110x->regs, default_regs, 8);
- /* setup divider */
- switch (stv6110x->config->clk_div) {
- default:
- case 1:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
- break;
- case 2:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
- break;
- case 4:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
- break;
- case 8:
- case 0:
- STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
- break;
- }
- fe->tuner_priv = stv6110x;
- fe->ops.tuner_ops = stv6110x_ops;
- printk(KERN_INFO "%s: Attaching STV6110x\n", __func__);
- return stv6110x->devctl;
- }
- EXPORT_SYMBOL(stv6110x_attach);
- MODULE_AUTHOR("Manu Abraham");
- MODULE_DESCRIPTION("STV6110x Silicon tuner");
- MODULE_LICENSE("GPL");
|