607 lines
13 KiB
C
607 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Driver for ST STV0288 demodulator
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Copyright (C) 2006 Georg Acher, BayCom GmbH, acher (at) baycom (dot) de
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for Reel Multimedia
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Copyright (C) 2008 TurboSight.com, Bob Liu <bob@turbosight.com>
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Copyright (C) 2008 Igor M. Liplianin <liplianin@me.by>
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Removed stb6000 specific tuner code and revised some
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procedures.
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2010-09-01 Josef Pavlik <josef@pavlik.it>
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Fixed diseqc_msg, diseqc_burst and set_tone problems
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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/string.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <asm/div64.h>
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#include <media/dvb_frontend.h>
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#include "stv0288.h"
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struct stv0288_state {
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struct i2c_adapter *i2c;
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const struct stv0288_config *config;
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struct dvb_frontend frontend;
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u8 initialised:1;
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u32 tuner_frequency;
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u32 symbol_rate;
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enum fe_code_rate fec_inner;
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int errmode;
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};
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#define STATUS_BER 0
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#define STATUS_UCBLOCKS 1
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static int debug;
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static int debug_legacy_dish_switch;
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#define dprintk(args...) \
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do { \
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if (debug) \
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printk(KERN_DEBUG "stv0288: " args); \
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} while (0)
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static int stv0288_writeregI(struct stv0288_state *state, u8 reg, u8 data)
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{
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int ret;
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u8 buf[] = { reg, data };
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struct i2c_msg msg = {
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.addr = state->config->demod_address,
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.flags = 0,
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.buf = buf,
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.len = 2
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};
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ret = i2c_transfer(state->i2c, &msg, 1);
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if (ret != 1)
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dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
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__func__, reg, data, ret);
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return (ret != 1) ? -EREMOTEIO : 0;
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}
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static int stv0288_write(struct dvb_frontend *fe, const u8 buf[], int len)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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if (len != 2)
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return -EINVAL;
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return stv0288_writeregI(state, buf[0], buf[1]);
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}
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static u8 stv0288_readreg(struct stv0288_state *state, u8 reg)
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{
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int ret;
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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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{
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.addr = state->config->demod_address,
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.flags = 0,
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.buf = b0,
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.len = 1
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}, {
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.addr = state->config->demod_address,
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.flags = I2C_M_RD,
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.buf = b1,
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.len = 1
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}
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};
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ret = i2c_transfer(state->i2c, msg, 2);
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if (ret != 2)
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dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
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__func__, reg, ret);
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return b1[0];
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}
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static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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unsigned int temp;
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unsigned char b[3];
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if ((srate < 1000000) || (srate > 45000000))
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return -EINVAL;
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stv0288_writeregI(state, 0x22, 0);
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stv0288_writeregI(state, 0x23, 0);
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stv0288_writeregI(state, 0x2b, 0xff);
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stv0288_writeregI(state, 0x2c, 0xf7);
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temp = (unsigned int)srate / 1000;
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temp = temp * 32768;
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temp = temp / 25;
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temp = temp / 125;
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b[0] = (unsigned char)((temp >> 12) & 0xff);
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b[1] = (unsigned char)((temp >> 4) & 0xff);
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b[2] = (unsigned char)((temp << 4) & 0xf0);
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stv0288_writeregI(state, 0x28, 0x80); /* SFRH */
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stv0288_writeregI(state, 0x29, 0); /* SFRM */
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stv0288_writeregI(state, 0x2a, 0); /* SFRL */
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stv0288_writeregI(state, 0x28, b[0]);
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stv0288_writeregI(state, 0x29, b[1]);
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stv0288_writeregI(state, 0x2a, b[2]);
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dprintk("stv0288: stv0288_set_symbolrate\n");
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return 0;
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}
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static int stv0288_send_diseqc_msg(struct dvb_frontend *fe,
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struct dvb_diseqc_master_cmd *m)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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int i;
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dprintk("%s\n", __func__);
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stv0288_writeregI(state, 0x09, 0);
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msleep(30);
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stv0288_writeregI(state, 0x05, 0x12);/* modulated mode, single shot */
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for (i = 0; i < m->msg_len; i++) {
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if (stv0288_writeregI(state, 0x06, m->msg[i]))
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return -EREMOTEIO;
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}
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msleep(m->msg_len*12);
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return 0;
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}
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static int stv0288_send_diseqc_burst(struct dvb_frontend *fe,
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enum fe_sec_mini_cmd burst)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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dprintk("%s\n", __func__);
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if (stv0288_writeregI(state, 0x05, 0x03))/* burst mode, single shot */
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return -EREMOTEIO;
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if (stv0288_writeregI(state, 0x06, burst == SEC_MINI_A ? 0x00 : 0xff))
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return -EREMOTEIO;
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msleep(15);
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if (stv0288_writeregI(state, 0x05, 0x12))
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return -EREMOTEIO;
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return 0;
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}
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static int stv0288_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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switch (tone) {
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case SEC_TONE_ON:
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if (stv0288_writeregI(state, 0x05, 0x10))/* cont carrier */
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return -EREMOTEIO;
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break;
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case SEC_TONE_OFF:
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if (stv0288_writeregI(state, 0x05, 0x12))/* burst mode off*/
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return -EREMOTEIO;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static u8 stv0288_inittab[] = {
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0x01, 0x15,
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0x02, 0x20,
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0x09, 0x0,
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0x0a, 0x4,
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0x0b, 0x0,
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0x0c, 0x0,
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0x0d, 0x0,
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0x0e, 0xd4,
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0x0f, 0x30,
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0x11, 0x80,
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0x12, 0x03,
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0x13, 0x48,
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0x14, 0x84,
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0x15, 0x45,
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0x16, 0xb7,
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0x17, 0x9c,
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0x18, 0x0,
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0x19, 0xa6,
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0x1a, 0x88,
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0x1b, 0x8f,
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0x1c, 0xf0,
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0x20, 0x0b,
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0x21, 0x54,
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0x22, 0x0,
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0x23, 0x0,
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0x2b, 0xff,
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0x2c, 0xf7,
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0x30, 0x0,
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0x31, 0x1e,
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0x32, 0x14,
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0x33, 0x0f,
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0x34, 0x09,
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0x35, 0x0c,
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0x36, 0x05,
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0x37, 0x2f,
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0x38, 0x16,
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0x39, 0xbe,
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0x3a, 0x0,
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0x3b, 0x13,
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0x3c, 0x11,
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0x3d, 0x30,
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0x40, 0x63,
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0x41, 0x04,
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0x42, 0x20,
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0x43, 0x00,
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0x44, 0x00,
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0x45, 0x00,
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0x46, 0x00,
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0x47, 0x00,
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0x4a, 0x00,
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0x50, 0x10,
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0x51, 0x38,
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0x52, 0x21,
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0x58, 0x54,
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0x59, 0x86,
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0x5a, 0x0,
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0x5b, 0x9b,
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0x5c, 0x08,
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0x5d, 0x7f,
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0x5e, 0x0,
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0x5f, 0xff,
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0x70, 0x0,
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0x71, 0x0,
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0x72, 0x0,
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0x74, 0x0,
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0x75, 0x0,
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0x76, 0x0,
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0x81, 0x0,
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0x82, 0x3f,
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0x83, 0x3f,
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0x84, 0x0,
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0x85, 0x0,
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0x88, 0x0,
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0x89, 0x0,
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0x8a, 0x0,
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0x8b, 0x0,
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0x8c, 0x0,
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0x90, 0x0,
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0x91, 0x0,
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0x92, 0x0,
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0x93, 0x0,
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0x94, 0x1c,
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0x97, 0x0,
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0xa0, 0x48,
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0xa1, 0x0,
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0xb0, 0xb8,
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0xb1, 0x3a,
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0xb2, 0x10,
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0xb3, 0x82,
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0xb4, 0x80,
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0xb5, 0x82,
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0xb6, 0x82,
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0xb7, 0x82,
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0xb8, 0x20,
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0xb9, 0x0,
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0xf0, 0x0,
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0xf1, 0x0,
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0xf2, 0xc0,
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0x51, 0x36,
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0x52, 0x09,
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0x53, 0x94,
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0x54, 0x62,
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0x55, 0x29,
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0x56, 0x64,
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0x57, 0x2b,
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0xff, 0xff,
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};
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static int stv0288_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage volt)
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{
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dprintk("%s: %s\n", __func__,
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volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
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volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
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return 0;
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}
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static int stv0288_init(struct dvb_frontend *fe)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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int i;
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u8 reg;
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u8 val;
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dprintk("stv0288: init chip\n");
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stv0288_writeregI(state, 0x41, 0x04);
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msleep(50);
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/* we have default inittab */
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if (state->config->inittab == NULL) {
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for (i = 0; !(stv0288_inittab[i] == 0xff &&
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stv0288_inittab[i + 1] == 0xff); i += 2)
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stv0288_writeregI(state, stv0288_inittab[i],
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stv0288_inittab[i + 1]);
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} else {
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for (i = 0; ; i += 2) {
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reg = state->config->inittab[i];
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val = state->config->inittab[i+1];
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if (reg == 0xff && val == 0xff)
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break;
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stv0288_writeregI(state, reg, val);
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}
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}
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return 0;
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}
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static int stv0288_read_status(struct dvb_frontend *fe, enum fe_status *status)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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u8 sync = stv0288_readreg(state, 0x24);
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if (sync == 255)
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sync = 0;
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dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
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*status = 0;
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if (sync & 0x80)
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*status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
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if (sync & 0x10)
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*status |= FE_HAS_VITERBI;
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if (sync & 0x08) {
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*status |= FE_HAS_LOCK;
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dprintk("stv0288 has locked\n");
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}
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return 0;
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}
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static int stv0288_read_ber(struct dvb_frontend *fe, u32 *ber)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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if (state->errmode != STATUS_BER)
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return 0;
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*ber = (stv0288_readreg(state, 0x26) << 8) |
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stv0288_readreg(state, 0x27);
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dprintk("stv0288_read_ber %d\n", *ber);
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return 0;
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}
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static int stv0288_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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s32 signal = 0xffff - ((stv0288_readreg(state, 0x10) << 8));
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signal = signal * 5 / 4;
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*strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
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dprintk("stv0288_read_signal_strength %d\n", *strength);
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return 0;
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}
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static int stv0288_sleep(struct dvb_frontend *fe)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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stv0288_writeregI(state, 0x41, 0x84);
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state->initialised = 0;
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return 0;
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}
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static int stv0288_read_snr(struct dvb_frontend *fe, u16 *snr)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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s32 xsnr = 0xffff - ((stv0288_readreg(state, 0x2d) << 8)
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| stv0288_readreg(state, 0x2e));
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xsnr = 3 * (xsnr - 0xa100);
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*snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
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dprintk("stv0288_read_snr %d\n", *snr);
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return 0;
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}
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static int stv0288_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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if (state->errmode != STATUS_BER)
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return 0;
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*ucblocks = (stv0288_readreg(state, 0x26) << 8) |
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stv0288_readreg(state, 0x27);
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dprintk("stv0288_read_ber %d\n", *ucblocks);
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return 0;
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}
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static int stv0288_set_frontend(struct dvb_frontend *fe)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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char tm;
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unsigned char tda[3];
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u8 reg, time_out = 0;
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dprintk("%s : FE_SET_FRONTEND\n", __func__);
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if (c->delivery_system != SYS_DVBS) {
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dprintk("%s: unsupported delivery system selected (%d)\n",
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__func__, c->delivery_system);
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return -EOPNOTSUPP;
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}
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if (state->config->set_ts_params)
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state->config->set_ts_params(fe, 0);
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/* only frequency & symbol_rate are used for tuner*/
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if (fe->ops.tuner_ops.set_params) {
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fe->ops.tuner_ops.set_params(fe);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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}
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udelay(10);
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stv0288_set_symbolrate(fe, c->symbol_rate);
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/* Carrier lock control register */
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stv0288_writeregI(state, 0x15, 0xc5);
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tda[2] = 0x0; /* CFRL */
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for (tm = -9; tm < 7;) {
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/* Viterbi status */
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reg = stv0288_readreg(state, 0x24);
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if (reg & 0x8)
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break;
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if (reg & 0x80) {
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time_out++;
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if (time_out > 10)
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break;
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tda[2] += 40;
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if (tda[2] < 40)
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tm++;
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} else {
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tm++;
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tda[2] = 0;
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time_out = 0;
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}
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tda[1] = (unsigned char)tm;
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stv0288_writeregI(state, 0x2b, tda[1]);
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stv0288_writeregI(state, 0x2c, tda[2]);
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msleep(30);
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}
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state->tuner_frequency = c->frequency;
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state->fec_inner = FEC_AUTO;
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state->symbol_rate = c->symbol_rate;
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return 0;
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}
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static int stv0288_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
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{
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struct stv0288_state *state = fe->demodulator_priv;
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if (enable)
|
|
stv0288_writeregI(state, 0x01, 0xb5);
|
|
else
|
|
stv0288_writeregI(state, 0x01, 0x35);
|
|
|
|
udelay(1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void stv0288_release(struct dvb_frontend *fe)
|
|
{
|
|
struct stv0288_state *state = fe->demodulator_priv;
|
|
kfree(state);
|
|
}
|
|
|
|
static const struct dvb_frontend_ops stv0288_ops = {
|
|
.delsys = { SYS_DVBS },
|
|
.info = {
|
|
.name = "ST STV0288 DVB-S",
|
|
.frequency_min_hz = 950 * MHz,
|
|
.frequency_max_hz = 2150 * MHz,
|
|
.frequency_stepsize_hz = 1 * MHz,
|
|
.symbol_rate_min = 1000000,
|
|
.symbol_rate_max = 45000000,
|
|
.symbol_rate_tolerance = 500, /* ppm */
|
|
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
|
|
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
|
|
FE_CAN_QPSK |
|
|
FE_CAN_FEC_AUTO
|
|
},
|
|
|
|
.release = stv0288_release,
|
|
.init = stv0288_init,
|
|
.sleep = stv0288_sleep,
|
|
.write = stv0288_write,
|
|
.i2c_gate_ctrl = stv0288_i2c_gate_ctrl,
|
|
.read_status = stv0288_read_status,
|
|
.read_ber = stv0288_read_ber,
|
|
.read_signal_strength = stv0288_read_signal_strength,
|
|
.read_snr = stv0288_read_snr,
|
|
.read_ucblocks = stv0288_read_ucblocks,
|
|
.diseqc_send_master_cmd = stv0288_send_diseqc_msg,
|
|
.diseqc_send_burst = stv0288_send_diseqc_burst,
|
|
.set_tone = stv0288_set_tone,
|
|
.set_voltage = stv0288_set_voltage,
|
|
|
|
.set_frontend = stv0288_set_frontend,
|
|
};
|
|
|
|
struct dvb_frontend *stv0288_attach(const struct stv0288_config *config,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct stv0288_state *state = NULL;
|
|
int id;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct stv0288_state), GFP_KERNEL);
|
|
if (state == NULL)
|
|
goto error;
|
|
|
|
/* setup the state */
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
state->initialised = 0;
|
|
state->tuner_frequency = 0;
|
|
state->symbol_rate = 0;
|
|
state->fec_inner = 0;
|
|
state->errmode = STATUS_BER;
|
|
|
|
stv0288_writeregI(state, 0x41, 0x04);
|
|
msleep(200);
|
|
id = stv0288_readreg(state, 0x00);
|
|
dprintk("stv0288 id %x\n", id);
|
|
|
|
/* register 0x00 contains 0x11 for STV0288 */
|
|
if (id != 0x11)
|
|
goto error;
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &stv0288_ops,
|
|
sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
|
|
error:
|
|
kfree(state);
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(stv0288_attach);
|
|
|
|
module_param(debug_legacy_dish_switch, int, 0444);
|
|
MODULE_PARM_DESC(debug_legacy_dish_switch,
|
|
"Enable timing analysis for Dish Network legacy switches");
|
|
|
|
module_param(debug, int, 0644);
|
|
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
|
|
|
|
MODULE_DESCRIPTION("ST STV0288 DVB Demodulator driver");
|
|
MODULE_AUTHOR("Georg Acher, Bob Liu, Igor liplianin");
|
|
MODULE_LICENSE("GPL");
|
|
|