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