diff options
Diffstat (limited to 'drivers/media/dvb-frontends/stv6110x.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stv6110x.c | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/stv6110x.c b/drivers/media/dvb-frontends/stv6110x.c new file mode 100644 index 00000000000..f36cab12bdc --- /dev/null +++ b/drivers/media/dvb-frontends/stv6110x.c @@ -0,0 +1,405 @@ +/* + 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" + +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[len + 1]; + struct i2c_msg msg = { + .addr = config->addr, + .flags = 0, + .buf = buf, + .len = len + 1 + }; + + 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) +{ + return stv6110x_write_regs(stv6110x, reg, &data, 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"); |