mirror of https://gitee.com/openkylin/linux.git
537 lines
11 KiB
C
537 lines
11 KiB
C
/*
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* ISDB-T driver for VA1J5JF8007/VA1J5JF8011
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*
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* Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
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*
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* based on pt1dvr - http://pt1dvr.sourceforge.jp/
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* by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
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*
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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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*
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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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*
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include "dvb_frontend.h"
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#include "dvb_math.h"
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#include "va1j5jf8007t.h"
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enum va1j5jf8007t_tune_state {
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VA1J5JF8007T_IDLE,
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VA1J5JF8007T_SET_FREQUENCY,
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VA1J5JF8007T_CHECK_FREQUENCY,
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VA1J5JF8007T_SET_MODULATION,
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VA1J5JF8007T_CHECK_MODULATION,
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VA1J5JF8007T_TRACK,
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VA1J5JF8007T_ABORT,
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};
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struct va1j5jf8007t_state {
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const struct va1j5jf8007t_config *config;
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struct i2c_adapter *adap;
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struct dvb_frontend fe;
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enum va1j5jf8007t_tune_state tune_state;
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};
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static int va1j5jf8007t_read_snr(struct dvb_frontend *fe, u16 *snr)
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{
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struct va1j5jf8007t_state *state;
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u8 addr;
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int i;
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u8 write_buf[1], read_buf[1];
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struct i2c_msg msgs[2];
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s32 word, x, y;
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state = fe->demodulator_priv;
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addr = state->config->demod_address;
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word = 0;
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for (i = 0; i < 3; i++) {
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write_buf[0] = 0x8b + i;
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msgs[0].addr = addr;
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msgs[0].flags = 0;
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msgs[0].len = sizeof(write_buf);
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msgs[0].buf = write_buf;
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msgs[1].addr = addr;
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msgs[1].flags = I2C_M_RD;
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msgs[1].len = sizeof(read_buf);
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msgs[1].buf = read_buf;
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if (i2c_transfer(state->adap, msgs, 2) != 2)
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return -EREMOTEIO;
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word <<= 8;
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word |= read_buf[0];
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}
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if (!word)
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return -EIO;
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x = 10 * (intlog10(0x540000 * 100 / word) - (2 << 24));
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y = (24ll << 46) / 1000000;
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y = ((s64)y * x >> 30) - (16ll << 40) / 10000;
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y = ((s64)y * x >> 29) + (398ll << 35) / 10000;
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y = ((s64)y * x >> 30) + (5491ll << 29) / 10000;
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y = ((s64)y * x >> 30) + (30965ll << 23) / 10000;
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*snr = y >> 15;
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return 0;
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}
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static int va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe)
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{
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return DVBFE_ALGO_HW;
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}
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static int
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va1j5jf8007t_read_status(struct dvb_frontend *fe, fe_status_t *status)
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{
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struct va1j5jf8007t_state *state;
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state = fe->demodulator_priv;
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switch (state->tune_state) {
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case VA1J5JF8007T_IDLE:
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case VA1J5JF8007T_SET_FREQUENCY:
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case VA1J5JF8007T_CHECK_FREQUENCY:
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*status = 0;
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return 0;
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case VA1J5JF8007T_SET_MODULATION:
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case VA1J5JF8007T_CHECK_MODULATION:
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case VA1J5JF8007T_ABORT:
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*status |= FE_HAS_SIGNAL;
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return 0;
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case VA1J5JF8007T_TRACK:
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
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return 0;
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}
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BUG();
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}
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struct va1j5jf8007t_cb_map {
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u32 frequency;
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u8 cb;
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};
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static const struct va1j5jf8007t_cb_map va1j5jf8007t_cb_maps[] = {
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{ 90000000, 0x80 },
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{ 140000000, 0x81 },
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{ 170000000, 0xa1 },
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{ 220000000, 0x62 },
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{ 330000000, 0xa2 },
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{ 402000000, 0xe2 },
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{ 450000000, 0x64 },
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{ 550000000, 0x84 },
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{ 600000000, 0xa4 },
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{ 700000000, 0xc4 },
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};
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static u8 va1j5jf8007t_lookup_cb(u32 frequency)
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{
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int i;
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const struct va1j5jf8007t_cb_map *map;
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for (i = 0; i < ARRAY_SIZE(va1j5jf8007t_cb_maps); i++) {
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map = &va1j5jf8007t_cb_maps[i];
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if (frequency < map->frequency)
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return map->cb;
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}
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return 0xe4;
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}
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static int va1j5jf8007t_set_frequency(struct va1j5jf8007t_state *state)
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{
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u32 frequency;
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u16 word;
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u8 buf[6];
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struct i2c_msg msg;
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frequency = state->fe.dtv_property_cache.frequency;
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word = (frequency + 71428) / 142857 + 399;
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buf[0] = 0xfe;
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buf[1] = 0xc2;
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buf[2] = word >> 8;
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buf[3] = word;
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buf[4] = 0x80;
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buf[5] = va1j5jf8007t_lookup_cb(frequency);
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msg.addr = state->config->demod_address;
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msg.flags = 0;
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msg.len = sizeof(buf);
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msg.buf = buf;
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if (i2c_transfer(state->adap, &msg, 1) != 1)
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return -EREMOTEIO;
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return 0;
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}
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static int
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va1j5jf8007t_check_frequency(struct va1j5jf8007t_state *state, int *lock)
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{
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u8 addr;
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u8 write_buf[2], read_buf[1];
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struct i2c_msg msgs[2];
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addr = state->config->demod_address;
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write_buf[0] = 0xfe;
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write_buf[1] = 0xc3;
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msgs[0].addr = addr;
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msgs[0].flags = 0;
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msgs[0].len = sizeof(write_buf);
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msgs[0].buf = write_buf;
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msgs[1].addr = addr;
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msgs[1].flags = I2C_M_RD;
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msgs[1].len = sizeof(read_buf);
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msgs[1].buf = read_buf;
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if (i2c_transfer(state->adap, msgs, 2) != 2)
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return -EREMOTEIO;
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*lock = read_buf[0] & 0x40;
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return 0;
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}
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static int va1j5jf8007t_set_modulation(struct va1j5jf8007t_state *state)
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{
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u8 buf[2];
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struct i2c_msg msg;
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buf[0] = 0x01;
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buf[1] = 0x40;
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msg.addr = state->config->demod_address;
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msg.flags = 0;
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msg.len = sizeof(buf);
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msg.buf = buf;
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if (i2c_transfer(state->adap, &msg, 1) != 1)
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return -EREMOTEIO;
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return 0;
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}
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static int va1j5jf8007t_check_modulation(struct va1j5jf8007t_state *state,
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int *lock, int *retry)
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{
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u8 addr;
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u8 write_buf[1], read_buf[1];
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struct i2c_msg msgs[2];
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addr = state->config->demod_address;
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write_buf[0] = 0x80;
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msgs[0].addr = addr;
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msgs[0].flags = 0;
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msgs[0].len = sizeof(write_buf);
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msgs[0].buf = write_buf;
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msgs[1].addr = addr;
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msgs[1].flags = I2C_M_RD;
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msgs[1].len = sizeof(read_buf);
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msgs[1].buf = read_buf;
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if (i2c_transfer(state->adap, msgs, 2) != 2)
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return -EREMOTEIO;
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*lock = !(read_buf[0] & 0x10);
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*retry = read_buf[0] & 0x80;
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return 0;
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}
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static int
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va1j5jf8007t_tune(struct dvb_frontend *fe,
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struct dvb_frontend_parameters *params,
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unsigned int mode_flags, unsigned int *delay,
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fe_status_t *status)
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{
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struct va1j5jf8007t_state *state;
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int ret;
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int lock = 0, retry = 0;
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state = fe->demodulator_priv;
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if (params != NULL)
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state->tune_state = VA1J5JF8007T_SET_FREQUENCY;
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switch (state->tune_state) {
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case VA1J5JF8007T_IDLE:
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*delay = 3 * HZ;
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*status = 0;
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return 0;
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case VA1J5JF8007T_SET_FREQUENCY:
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ret = va1j5jf8007t_set_frequency(state);
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if (ret < 0)
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return ret;
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state->tune_state = VA1J5JF8007T_CHECK_FREQUENCY;
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*delay = 0;
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*status = 0;
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return 0;
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case VA1J5JF8007T_CHECK_FREQUENCY:
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ret = va1j5jf8007t_check_frequency(state, &lock);
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if (ret < 0)
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return ret;
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if (!lock) {
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*delay = (HZ + 999) / 1000;
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*status = 0;
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return 0;
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}
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state->tune_state = VA1J5JF8007T_SET_MODULATION;
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*delay = 0;
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*status = FE_HAS_SIGNAL;
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return 0;
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case VA1J5JF8007T_SET_MODULATION:
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ret = va1j5jf8007t_set_modulation(state);
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if (ret < 0)
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return ret;
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state->tune_state = VA1J5JF8007T_CHECK_MODULATION;
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*delay = 0;
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*status = FE_HAS_SIGNAL;
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return 0;
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case VA1J5JF8007T_CHECK_MODULATION:
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ret = va1j5jf8007t_check_modulation(state, &lock, &retry);
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if (ret < 0)
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return ret;
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if (!lock) {
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if (!retry) {
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state->tune_state = VA1J5JF8007T_ABORT;
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*delay = 3 * HZ;
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*status = FE_HAS_SIGNAL;
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return 0;
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}
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*delay = (HZ + 999) / 1000;
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*status = FE_HAS_SIGNAL;
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return 0;
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}
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state->tune_state = VA1J5JF8007T_TRACK;
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/* fall through */
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case VA1J5JF8007T_TRACK:
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*delay = 3 * HZ;
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*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
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return 0;
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case VA1J5JF8007T_ABORT:
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*delay = 3 * HZ;
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*status = FE_HAS_SIGNAL;
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return 0;
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}
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BUG();
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}
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static int va1j5jf8007t_init_frequency(struct va1j5jf8007t_state *state)
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{
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u8 buf[7];
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struct i2c_msg msg;
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buf[0] = 0xfe;
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buf[1] = 0xc2;
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buf[2] = 0x01;
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buf[3] = 0x8f;
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buf[4] = 0xc1;
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buf[5] = 0x80;
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buf[6] = 0x80;
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msg.addr = state->config->demod_address;
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msg.flags = 0;
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msg.len = sizeof(buf);
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msg.buf = buf;
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if (i2c_transfer(state->adap, &msg, 1) != 1)
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return -EREMOTEIO;
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return 0;
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}
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static int va1j5jf8007t_set_sleep(struct va1j5jf8007t_state *state, int sleep)
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{
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u8 buf[2];
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struct i2c_msg msg;
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buf[0] = 0x03;
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buf[1] = sleep ? 0x90 : 0x80;
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msg.addr = state->config->demod_address;
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msg.flags = 0;
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msg.len = sizeof(buf);
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msg.buf = buf;
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if (i2c_transfer(state->adap, &msg, 1) != 1)
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return -EREMOTEIO;
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return 0;
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}
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static int va1j5jf8007t_sleep(struct dvb_frontend *fe)
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{
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struct va1j5jf8007t_state *state;
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int ret;
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state = fe->demodulator_priv;
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ret = va1j5jf8007t_init_frequency(state);
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if (ret < 0)
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return ret;
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return va1j5jf8007t_set_sleep(state, 1);
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}
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static int va1j5jf8007t_init(struct dvb_frontend *fe)
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{
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struct va1j5jf8007t_state *state;
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state = fe->demodulator_priv;
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state->tune_state = VA1J5JF8007T_IDLE;
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return va1j5jf8007t_set_sleep(state, 0);
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}
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static void va1j5jf8007t_release(struct dvb_frontend *fe)
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{
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struct va1j5jf8007t_state *state;
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state = fe->demodulator_priv;
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kfree(state);
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}
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static struct dvb_frontend_ops va1j5jf8007t_ops = {
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.info = {
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.name = "VA1J5JF8007/VA1J5JF8011 ISDB-T",
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.type = FE_OFDM,
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.frequency_min = 90000000,
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.frequency_max = 770000000,
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.frequency_stepsize = 142857,
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.caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
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FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
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FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
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},
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.read_snr = va1j5jf8007t_read_snr,
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.get_frontend_algo = va1j5jf8007t_get_frontend_algo,
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.read_status = va1j5jf8007t_read_status,
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.tune = va1j5jf8007t_tune,
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.sleep = va1j5jf8007t_sleep,
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.init = va1j5jf8007t_init,
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.release = va1j5jf8007t_release,
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};
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static const u8 va1j5jf8007t_20mhz_prepare_bufs[][2] = {
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{0x03, 0x90}, {0x14, 0x8f}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2},
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{0x22, 0x83}, {0x31, 0x0d}, {0x32, 0xe0}, {0x39, 0xd3}, {0x3a, 0x00},
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{0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x02}, {0x76, 0x4e}, {0x77, 0x03},
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{0xef, 0x01}
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};
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static const u8 va1j5jf8007t_25mhz_prepare_bufs[][2] = {
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{0x03, 0x90}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2}, {0x22, 0x83},
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{0x3a, 0x00}, {0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x0a}, {0x76, 0x4c},
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{0x77, 0x03}, {0xef, 0x01}
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};
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int va1j5jf8007t_prepare(struct dvb_frontend *fe)
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{
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struct va1j5jf8007t_state *state;
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const u8 (*bufs)[2];
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int size;
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u8 buf[2];
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struct i2c_msg msg;
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int i;
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state = fe->demodulator_priv;
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switch (state->config->frequency) {
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case VA1J5JF8007T_20MHZ:
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bufs = va1j5jf8007t_20mhz_prepare_bufs;
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size = ARRAY_SIZE(va1j5jf8007t_20mhz_prepare_bufs);
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break;
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case VA1J5JF8007T_25MHZ:
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bufs = va1j5jf8007t_25mhz_prepare_bufs;
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size = ARRAY_SIZE(va1j5jf8007t_25mhz_prepare_bufs);
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break;
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default:
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return -EINVAL;
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}
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msg.addr = state->config->demod_address;
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msg.flags = 0;
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msg.len = sizeof(buf);
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msg.buf = buf;
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for (i = 0; i < size; i++) {
|
|
memcpy(buf, bufs[i], sizeof(buf));
|
|
if (i2c_transfer(state->adap, &msg, 1) != 1)
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
return va1j5jf8007t_init_frequency(state);
|
|
}
|
|
|
|
struct dvb_frontend *
|
|
va1j5jf8007t_attach(const struct va1j5jf8007t_config *config,
|
|
struct i2c_adapter *adap)
|
|
{
|
|
struct va1j5jf8007t_state *state;
|
|
struct dvb_frontend *fe;
|
|
u8 buf[2];
|
|
struct i2c_msg msg;
|
|
|
|
state = kzalloc(sizeof(struct va1j5jf8007t_state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
state->config = config;
|
|
state->adap = adap;
|
|
|
|
fe = &state->fe;
|
|
memcpy(&fe->ops, &va1j5jf8007t_ops, sizeof(struct dvb_frontend_ops));
|
|
fe->demodulator_priv = state;
|
|
|
|
buf[0] = 0x01;
|
|
buf[1] = 0x80;
|
|
|
|
msg.addr = state->config->demod_address;
|
|
msg.flags = 0;
|
|
msg.len = sizeof(buf);
|
|
msg.buf = buf;
|
|
|
|
if (i2c_transfer(state->adap, &msg, 1) != 1) {
|
|
kfree(state);
|
|
return NULL;
|
|
}
|
|
|
|
return fe;
|
|
}
|