1062 lines
23 KiB
C
1062 lines
23 KiB
C
/*
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* Support for Legend Silicon GB20600 (a.k.a DMB-TH) demodulator
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* LGS8913, LGS8GL5, LGS8G75
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* experimental support LGS8G42, LGS8G52
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*
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* Copyright (C) 2007-2009 David T.L. Wong <davidtlwong@gmail.com>
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* Copyright (C) 2008 Sirius International (Hong Kong) Limited
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* Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5)
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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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*/
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#include <asm/div64.h>
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#include <linux/firmware.h>
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#include <media/dvb_frontend.h>
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#include "lgs8gxx.h"
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#include "lgs8gxx_priv.h"
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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 "lgs8gxx: " args); \
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} while (0)
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static int debug;
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static int fake_signal_str = 1;
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#define LGS8GXX_FIRMWARE "lgs8g75.fw"
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
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module_param(fake_signal_str, int, 0644);
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MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
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"Signal strength calculation is slow.(default:on).");
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/* LGS8GXX internal helper functions */
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static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, 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 = { .flags = 0, .buf = buf, .len = 2 };
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msg.addr = priv->config->demod_address;
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if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
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msg.addr += 0x02;
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if (debug >= 2)
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dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
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ret = i2c_transfer(priv->i2c, &msg, 1);
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if (ret != 1)
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dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
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__func__, reg, data, ret);
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return (ret != 1) ? -1 : 0;
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}
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static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
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{
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int ret;
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u8 dev_addr;
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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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{ .flags = 0, .buf = b0, .len = 1 },
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{ .flags = I2C_M_RD, .buf = b1, .len = 1 },
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};
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dev_addr = priv->config->demod_address;
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if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
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dev_addr += 0x02;
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msg[1].addr = msg[0].addr = dev_addr;
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ret = i2c_transfer(priv->i2c, msg, 2);
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if (ret != 2) {
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dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
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return -1;
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}
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*p_data = b1[0];
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if (debug >= 2)
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dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]);
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return 0;
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}
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static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
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{
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lgs8gxx_write_reg(priv, 0x02, 0x00);
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msleep(1);
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lgs8gxx_write_reg(priv, 0x02, 0x01);
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msleep(100);
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return 0;
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}
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static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
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u8 val, u8 delay, u8 tries)
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{
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u8 t;
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int i;
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for (i = 0; i < tries; i++) {
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lgs8gxx_read_reg(priv, reg, &t);
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if ((t & mask) == val)
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return 0;
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msleep(delay);
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}
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return 1;
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}
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static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
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{
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const struct lgs8gxx_config *config = priv->config;
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u8 if_conf;
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if_conf = 0x10; /* AGC output on, RF_AGC output off; */
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if_conf |=
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((config->ext_adc) ? 0x80 : 0x00) |
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((config->if_neg_center) ? 0x04 : 0x00) |
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((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
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((config->adc_signed) ? 0x02 : 0x00) |
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((config->if_neg_edge) ? 0x01 : 0x00);
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if (config->ext_adc &&
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(config->prod == LGS8GXX_PROD_LGS8G52)) {
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lgs8gxx_write_reg(priv, 0xBA, 0x40);
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}
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lgs8gxx_write_reg(priv, 0x07, if_conf);
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return 0;
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}
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static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
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{
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u64 val;
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u32 v32;
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u32 if_clk;
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if_clk = priv->config->if_clk_freq;
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val = freq;
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if (freq != 0) {
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val <<= 32;
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if (if_clk != 0)
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do_div(val, if_clk);
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v32 = val & 0xFFFFFFFF;
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dprintk("Set IF Freq to %dkHz\n", freq);
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} else {
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v32 = 0;
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dprintk("Set IF Freq to baseband\n");
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}
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dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
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lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
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lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
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lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
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lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
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} else {
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lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
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lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
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lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
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lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
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}
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return 0;
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}
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static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
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{
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u64 val;
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u32 v32 = 0;
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u8 reg_addr, t;
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int i;
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
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reg_addr = 0x23;
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else
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reg_addr = 0x48;
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for (i = 0; i < 4; i++) {
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lgs8gxx_read_reg(priv, reg_addr, &t);
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v32 <<= 8;
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v32 |= t;
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reg_addr--;
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}
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val = v32;
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val *= priv->config->if_clk_freq;
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val >>= 32;
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dprintk("AFC = %u kHz\n", (u32)val);
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return 0;
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}
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static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
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{
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u8 t;
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u8 prod = priv->config->prod;
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if (prod == LGS8GXX_PROD_LGS8913)
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lgs8gxx_write_reg(priv, 0xC6, 0x01);
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if (prod == LGS8GXX_PROD_LGS8G75) {
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lgs8gxx_read_reg(priv, 0x0C, &t);
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t &= (~0x04);
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lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
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lgs8gxx_write_reg(priv, 0x39, 0x00);
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lgs8gxx_write_reg(priv, 0x3D, 0x04);
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} else if (prod == LGS8GXX_PROD_LGS8913 ||
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prod == LGS8GXX_PROD_LGS8GL5 ||
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prod == LGS8GXX_PROD_LGS8G42 ||
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prod == LGS8GXX_PROD_LGS8G52 ||
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prod == LGS8GXX_PROD_LGS8G54) {
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lgs8gxx_read_reg(priv, 0x7E, &t);
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lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
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/* clear FEC self reset */
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lgs8gxx_read_reg(priv, 0xC5, &t);
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lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
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}
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if (prod == LGS8GXX_PROD_LGS8913) {
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/* FEC auto detect */
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lgs8gxx_write_reg(priv, 0xC1, 0x03);
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lgs8gxx_read_reg(priv, 0x7C, &t);
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t = (t & 0x8C) | 0x03;
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lgs8gxx_write_reg(priv, 0x7C, t);
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/* BER test mode */
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lgs8gxx_read_reg(priv, 0xC3, &t);
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t = (t & 0xEF) | 0x10;
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lgs8gxx_write_reg(priv, 0xC3, t);
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}
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if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
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lgs8gxx_write_reg(priv, 0xD9, 0x40);
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return 0;
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}
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static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
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{
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u8 t;
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
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u8 t2;
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lgs8gxx_read_reg(priv, 0x0C, &t);
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t &= (~0x80);
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lgs8gxx_write_reg(priv, 0x0C, t);
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lgs8gxx_read_reg(priv, 0x0C, &t);
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lgs8gxx_read_reg(priv, 0x19, &t2);
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if (((t&0x03) == 0x01) && (t2&0x01)) {
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lgs8gxx_write_reg(priv, 0x6E, 0x05);
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lgs8gxx_write_reg(priv, 0x39, 0x02);
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lgs8gxx_write_reg(priv, 0x39, 0x03);
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lgs8gxx_write_reg(priv, 0x3D, 0x05);
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lgs8gxx_write_reg(priv, 0x3E, 0x28);
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lgs8gxx_write_reg(priv, 0x53, 0x80);
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} else {
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lgs8gxx_write_reg(priv, 0x6E, 0x3F);
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lgs8gxx_write_reg(priv, 0x39, 0x00);
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lgs8gxx_write_reg(priv, 0x3D, 0x04);
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}
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lgs8gxx_soft_reset(priv);
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return 0;
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}
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/* turn off auto-detect; manual settings */
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lgs8gxx_write_reg(priv, 0x7E, 0);
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if (priv->config->prod == LGS8GXX_PROD_LGS8913)
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lgs8gxx_write_reg(priv, 0xC1, 0);
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lgs8gxx_read_reg(priv, 0xC5, &t);
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t = (t & 0xE0) | 0x06;
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lgs8gxx_write_reg(priv, 0xC5, t);
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lgs8gxx_soft_reset(priv);
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return 0;
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}
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static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
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{
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int ret = 0;
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u8 t;
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
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ret = lgs8gxx_read_reg(priv, 0x13, &t);
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else
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ret = lgs8gxx_read_reg(priv, 0x4B, &t);
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if (ret != 0)
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return ret;
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
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*locked = ((t & 0x80) == 0x80) ? 1 : 0;
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else
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*locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
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return 0;
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}
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/* Wait for Code Acquisition Lock */
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static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
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{
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int ret = 0;
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u8 reg, mask, val;
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
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reg = 0x13;
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mask = 0x80;
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val = 0x80;
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} else {
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reg = 0x4B;
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mask = 0xC0;
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val = 0xC0;
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}
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ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
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*locked = (ret == 0) ? 1 : 0;
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return 0;
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}
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static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
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u8 *finished)
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{
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int ret = 0;
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u8 reg, mask, val;
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
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reg = 0x1f;
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mask = 0xC0;
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val = 0x80;
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} else {
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reg = 0xA4;
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mask = 0x03;
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val = 0x01;
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}
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ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
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*finished = (ret == 0) ? 1 : 0;
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return 0;
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}
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static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
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u8 *locked)
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{
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int err = 0;
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u8 ad_fini = 0;
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u8 t1, t2;
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if (gi == GI_945)
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dprintk("try GI 945\n");
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else if (gi == GI_595)
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dprintk("try GI 595\n");
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else if (gi == GI_420)
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dprintk("try GI 420\n");
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
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lgs8gxx_read_reg(priv, 0x0C, &t1);
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lgs8gxx_read_reg(priv, 0x18, &t2);
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t1 &= ~(GI_MASK);
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t1 |= gi;
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t2 &= 0xFE;
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t2 |= cpn ? 0x01 : 0x00;
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lgs8gxx_write_reg(priv, 0x0C, t1);
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lgs8gxx_write_reg(priv, 0x18, t2);
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} else {
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lgs8gxx_write_reg(priv, 0x04, gi);
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}
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lgs8gxx_soft_reset(priv);
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err = lgs8gxx_wait_ca_lock(priv, locked);
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if (err || !(*locked))
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return err;
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err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
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if (err != 0)
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return err;
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if (ad_fini) {
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dprintk("auto detect finished\n");
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} else
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*locked = 0;
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return 0;
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}
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static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
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u8 *detected_param, u8 *gi)
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{
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int i, j;
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int err = 0;
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u8 locked = 0, tmp_gi;
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dprintk("%s\n", __func__);
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lgs8gxx_set_mode_auto(priv);
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if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
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lgs8gxx_write_reg(priv, 0x67, 0xAA);
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lgs8gxx_write_reg(priv, 0x6E, 0x3F);
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} else {
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/* Guard Interval */
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lgs8gxx_write_reg(priv, 0x03, 00);
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}
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for (i = 0; i < 2; i++) {
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for (j = 0; j < 2; j++) {
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tmp_gi = GI_945;
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err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
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if (err)
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goto out;
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if (locked)
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goto locked;
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}
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for (j = 0; j < 2; j++) {
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tmp_gi = GI_420;
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err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
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if (err)
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goto out;
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if (locked)
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goto locked;
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}
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tmp_gi = GI_595;
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err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
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if (err)
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goto out;
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if (locked)
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goto locked;
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}
|
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|
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locked:
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if ((err == 0) && (locked == 1)) {
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u8 t;
|
|
|
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if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
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lgs8gxx_read_reg(priv, 0xA2, &t);
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*detected_param = t;
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} else {
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lgs8gxx_read_reg(priv, 0x1F, &t);
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*detected_param = t & 0x3F;
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}
|
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|
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if (tmp_gi == GI_945)
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dprintk("GI 945 locked\n");
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else if (tmp_gi == GI_595)
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dprintk("GI 595 locked\n");
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else if (tmp_gi == GI_420)
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dprintk("GI 420 locked\n");
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*gi = tmp_gi;
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}
|
|
if (!locked)
|
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err = -1;
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|
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out:
|
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return err;
|
|
}
|
|
|
|
static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
|
|
{
|
|
s8 err;
|
|
u8 gi = 0x2;
|
|
u8 detected_param = 0;
|
|
|
|
err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
|
|
|
|
if (err != 0) {
|
|
dprintk("lgs8gxx_auto_detect failed\n");
|
|
} else
|
|
dprintk("detected param = 0x%02X\n", detected_param);
|
|
|
|
/* Apply detected parameters */
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
|
|
u8 inter_leave_len = detected_param & TIM_MASK ;
|
|
/* Fix 8913 time interleaver detection bug */
|
|
inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
|
|
detected_param &= CF_MASK | SC_MASK | LGS_FEC_MASK;
|
|
detected_param |= inter_leave_len;
|
|
}
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
|
|
u8 t;
|
|
lgs8gxx_read_reg(priv, 0x19, &t);
|
|
t &= 0x81;
|
|
t |= detected_param << 1;
|
|
lgs8gxx_write_reg(priv, 0x19, t);
|
|
} else {
|
|
lgs8gxx_write_reg(priv, 0x7D, detected_param);
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8913)
|
|
lgs8gxx_write_reg(priv, 0xC0, detected_param);
|
|
}
|
|
/* lgs8gxx_soft_reset(priv); */
|
|
|
|
/* Enter manual mode */
|
|
lgs8gxx_set_mode_manual(priv);
|
|
|
|
switch (gi) {
|
|
case GI_945:
|
|
priv->curr_gi = 945; break;
|
|
case GI_595:
|
|
priv->curr_gi = 595; break;
|
|
case GI_420:
|
|
priv->curr_gi = 420; break;
|
|
default:
|
|
priv->curr_gi = 945; break;
|
|
}
|
|
}
|
|
|
|
static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
|
|
u8 serial, u8 clk_pol, u8 clk_gated)
|
|
{
|
|
int ret = 0;
|
|
u8 t, reg_addr;
|
|
|
|
reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
|
|
ret = lgs8gxx_read_reg(priv, reg_addr, &t);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
t &= 0xF8;
|
|
t |= serial ? TS_SERIAL : TS_PARALLEL;
|
|
t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
|
|
t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
|
|
|
|
ret = lgs8gxx_write_reg(priv, reg_addr, t);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* A/D input peak-to-peak voltage range */
|
|
static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
|
|
u8 sel)
|
|
{
|
|
u8 r26 = 0x73, r27 = 0x90;
|
|
|
|
if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
|
|
return 0;
|
|
|
|
r26 |= (sel & 0x01) << 7;
|
|
r27 |= (sel & 0x02) >> 1;
|
|
lgs8gxx_write_reg(priv, 0x26, r26);
|
|
lgs8gxx_write_reg(priv, 0x27, r27);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* LGS8913 demod frontend functions */
|
|
|
|
static int lgs8913_init(struct lgs8gxx_state *priv)
|
|
{
|
|
u8 t;
|
|
|
|
/* LGS8913 specific */
|
|
lgs8gxx_write_reg(priv, 0xc1, 0x3);
|
|
|
|
lgs8gxx_read_reg(priv, 0x7c, &t);
|
|
lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
|
|
|
|
/* LGS8913 specific */
|
|
lgs8gxx_read_reg(priv, 0xc3, &t);
|
|
lgs8gxx_write_reg(priv, 0xc3, t&0x10);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8g75_init_data(struct lgs8gxx_state *priv)
|
|
{
|
|
const struct firmware *fw;
|
|
int rc;
|
|
int i;
|
|
|
|
rc = request_firmware(&fw, LGS8GXX_FIRMWARE, &priv->i2c->dev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
lgs8gxx_write_reg(priv, 0xC6, 0x40);
|
|
|
|
lgs8gxx_write_reg(priv, 0x3D, 0x04);
|
|
lgs8gxx_write_reg(priv, 0x39, 0x00);
|
|
|
|
lgs8gxx_write_reg(priv, 0x3A, 0x00);
|
|
lgs8gxx_write_reg(priv, 0x38, 0x00);
|
|
lgs8gxx_write_reg(priv, 0x3B, 0x00);
|
|
lgs8gxx_write_reg(priv, 0x38, 0x00);
|
|
|
|
for (i = 0; i < fw->size; i++) {
|
|
lgs8gxx_write_reg(priv, 0x38, 0x00);
|
|
lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
|
|
lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
|
|
lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
|
|
}
|
|
|
|
lgs8gxx_write_reg(priv, 0x38, 0x00);
|
|
|
|
release_firmware(fw);
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8gxx_init(struct dvb_frontend *fe)
|
|
{
|
|
struct lgs8gxx_state *priv =
|
|
(struct lgs8gxx_state *)fe->demodulator_priv;
|
|
const struct lgs8gxx_config *config = priv->config;
|
|
u8 data = 0;
|
|
s8 err;
|
|
dprintk("%s\n", __func__);
|
|
|
|
lgs8gxx_read_reg(priv, 0, &data);
|
|
dprintk("reg 0 = 0x%02X\n", data);
|
|
|
|
if (config->prod == LGS8GXX_PROD_LGS8G75)
|
|
lgs8g75_set_adc_vpp(priv, config->adc_vpp);
|
|
|
|
/* Setup MPEG output format */
|
|
err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
|
|
config->ts_clk_pol,
|
|
config->ts_clk_gated);
|
|
if (err != 0)
|
|
return -EIO;
|
|
|
|
if (config->prod == LGS8GXX_PROD_LGS8913)
|
|
lgs8913_init(priv);
|
|
lgs8gxx_set_if_freq(priv, priv->config->if_freq);
|
|
lgs8gxx_set_ad_mode(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lgs8gxx_release(struct dvb_frontend *fe)
|
|
{
|
|
struct lgs8gxx_state *state = fe->demodulator_priv;
|
|
dprintk("%s\n", __func__);
|
|
|
|
kfree(state);
|
|
}
|
|
|
|
|
|
static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
|
|
{
|
|
struct lgs8gxx_state *priv = fe->demodulator_priv;
|
|
|
|
if (len != 2)
|
|
return -EINVAL;
|
|
|
|
return lgs8gxx_write_reg(priv, buf[0], buf[1]);
|
|
}
|
|
|
|
static int lgs8gxx_set_fe(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
|
|
struct lgs8gxx_state *priv = fe->demodulator_priv;
|
|
|
|
dprintk("%s\n", __func__);
|
|
|
|
/* set frequency */
|
|
if (fe->ops.tuner_ops.set_params) {
|
|
fe->ops.tuner_ops.set_params(fe);
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
}
|
|
|
|
/* start auto lock */
|
|
lgs8gxx_auto_lock(priv);
|
|
|
|
msleep(10);
|
|
|
|
/* TODO: get real readings from device */
|
|
|
|
/* bandwidth */
|
|
fe_params->bandwidth_hz = 8000000;
|
|
|
|
fe_params->code_rate_HP = FEC_AUTO;
|
|
fe_params->code_rate_LP = FEC_AUTO;
|
|
|
|
fe_params->modulation = QAM_AUTO;
|
|
|
|
/* transmission mode */
|
|
fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
|
|
|
|
/* guard interval */
|
|
fe_params->guard_interval = GUARD_INTERVAL_AUTO;
|
|
|
|
/* hierarchy */
|
|
fe_params->hierarchy = HIERARCHY_NONE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
|
|
struct dvb_frontend_tune_settings *fesettings)
|
|
{
|
|
/* FIXME: copy from tda1004x.c */
|
|
fesettings->min_delay_ms = 800;
|
|
fesettings->step_size = 0;
|
|
fesettings->max_drift = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8gxx_read_status(struct dvb_frontend *fe,
|
|
enum fe_status *fe_status)
|
|
{
|
|
struct lgs8gxx_state *priv = fe->demodulator_priv;
|
|
s8 ret;
|
|
u8 t, locked = 0;
|
|
|
|
dprintk("%s\n", __func__);
|
|
*fe_status = 0;
|
|
|
|
lgs8gxx_get_afc_phase(priv);
|
|
lgs8gxx_is_locked(priv, &locked);
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
|
|
if (locked)
|
|
*fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
|
|
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
|
|
return 0;
|
|
}
|
|
|
|
ret = lgs8gxx_read_reg(priv, 0x4B, &t);
|
|
if (ret != 0)
|
|
return -EIO;
|
|
|
|
dprintk("Reg 0x4B: 0x%02X\n", t);
|
|
|
|
*fe_status = 0;
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
|
|
if ((t & 0x40) == 0x40)
|
|
*fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
|
|
if ((t & 0x80) == 0x80)
|
|
*fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
|
|
FE_HAS_LOCK;
|
|
} else {
|
|
if ((t & 0x80) == 0x80)
|
|
*fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
|
|
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
|
|
}
|
|
|
|
/* success */
|
|
dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
|
|
{
|
|
u16 v;
|
|
u8 agc_lvl[2], cat;
|
|
|
|
dprintk("%s()\n", __func__);
|
|
lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
|
|
lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
|
|
|
|
v = agc_lvl[0];
|
|
v <<= 8;
|
|
v |= agc_lvl[1];
|
|
|
|
dprintk("agc_lvl: 0x%04X\n", v);
|
|
|
|
if (v < 0x100)
|
|
cat = 0;
|
|
else if (v < 0x190)
|
|
cat = 5;
|
|
else if (v < 0x2A8)
|
|
cat = 4;
|
|
else if (v < 0x381)
|
|
cat = 3;
|
|
else if (v < 0x400)
|
|
cat = 2;
|
|
else if (v == 0x400)
|
|
cat = 1;
|
|
else
|
|
cat = 0;
|
|
|
|
*signal = cat * 65535 / 5;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
|
|
{
|
|
u8 t; s8 ret;
|
|
s16 max_strength = 0;
|
|
u8 str;
|
|
u16 i, gi = priv->curr_gi;
|
|
|
|
dprintk("%s\n", __func__);
|
|
|
|
ret = lgs8gxx_read_reg(priv, 0x4B, &t);
|
|
if (ret != 0)
|
|
return -EIO;
|
|
|
|
if (fake_signal_str) {
|
|
if ((t & 0xC0) == 0xC0) {
|
|
dprintk("Fake signal strength\n");
|
|
*signal = 0x7FFF;
|
|
} else
|
|
*signal = 0;
|
|
return 0;
|
|
}
|
|
|
|
dprintk("gi = %d\n", gi);
|
|
for (i = 0; i < gi; i++) {
|
|
|
|
if ((i & 0xFF) == 0)
|
|
lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
|
|
lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
|
|
|
|
lgs8gxx_read_reg(priv, 0x94, &str);
|
|
if (max_strength < str)
|
|
max_strength = str;
|
|
}
|
|
|
|
*signal = max_strength;
|
|
dprintk("%s: signal=0x%02X\n", __func__, *signal);
|
|
|
|
lgs8gxx_read_reg(priv, 0x95, &t);
|
|
dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
|
|
{
|
|
u8 t;
|
|
s16 v = 0;
|
|
|
|
dprintk("%s\n", __func__);
|
|
|
|
lgs8gxx_read_reg(priv, 0xB1, &t);
|
|
v |= t;
|
|
v <<= 8;
|
|
lgs8gxx_read_reg(priv, 0xB0, &t);
|
|
v |= t;
|
|
|
|
*signal = v;
|
|
dprintk("%s: signal=0x%02X\n", __func__, *signal);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
|
|
{
|
|
struct lgs8gxx_state *priv = fe->demodulator_priv;
|
|
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8913)
|
|
return lgs8913_read_signal_strength(priv, signal);
|
|
else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
|
|
return lgs8g75_read_signal_strength(priv, signal);
|
|
else
|
|
return lgs8gxx_read_signal_agc(priv, signal);
|
|
}
|
|
|
|
static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
|
|
{
|
|
struct lgs8gxx_state *priv = fe->demodulator_priv;
|
|
u8 t;
|
|
*snr = 0;
|
|
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
|
|
lgs8gxx_read_reg(priv, 0x34, &t);
|
|
else
|
|
lgs8gxx_read_reg(priv, 0x95, &t);
|
|
dprintk("AVG Noise=0x%02X\n", t);
|
|
*snr = 256 - t;
|
|
*snr <<= 8;
|
|
dprintk("snr=0x%x\n", *snr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
|
|
{
|
|
*ucblocks = 0;
|
|
dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
|
|
return 0;
|
|
}
|
|
|
|
static void packet_counter_start(struct lgs8gxx_state *priv)
|
|
{
|
|
u8 orig, t;
|
|
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
|
|
lgs8gxx_read_reg(priv, 0x30, &orig);
|
|
orig &= 0xE7;
|
|
t = orig | 0x10;
|
|
lgs8gxx_write_reg(priv, 0x30, t);
|
|
t = orig | 0x18;
|
|
lgs8gxx_write_reg(priv, 0x30, t);
|
|
t = orig | 0x10;
|
|
lgs8gxx_write_reg(priv, 0x30, t);
|
|
} else {
|
|
lgs8gxx_write_reg(priv, 0xC6, 0x01);
|
|
lgs8gxx_write_reg(priv, 0xC6, 0x41);
|
|
lgs8gxx_write_reg(priv, 0xC6, 0x01);
|
|
}
|
|
}
|
|
|
|
static void packet_counter_stop(struct lgs8gxx_state *priv)
|
|
{
|
|
u8 t;
|
|
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
|
|
lgs8gxx_read_reg(priv, 0x30, &t);
|
|
t &= 0xE7;
|
|
lgs8gxx_write_reg(priv, 0x30, t);
|
|
} else {
|
|
lgs8gxx_write_reg(priv, 0xC6, 0x81);
|
|
}
|
|
}
|
|
|
|
static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
|
|
{
|
|
struct lgs8gxx_state *priv = fe->demodulator_priv;
|
|
u8 reg_err, reg_total, t;
|
|
u32 total_cnt = 0, err_cnt = 0;
|
|
int i;
|
|
|
|
dprintk("%s\n", __func__);
|
|
|
|
packet_counter_start(priv);
|
|
msleep(200);
|
|
packet_counter_stop(priv);
|
|
|
|
if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
|
|
reg_total = 0x28; reg_err = 0x2C;
|
|
} else {
|
|
reg_total = 0xD0; reg_err = 0xD4;
|
|
}
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
total_cnt <<= 8;
|
|
lgs8gxx_read_reg(priv, reg_total+3-i, &t);
|
|
total_cnt |= t;
|
|
}
|
|
for (i = 0; i < 4; i++) {
|
|
err_cnt <<= 8;
|
|
lgs8gxx_read_reg(priv, reg_err+3-i, &t);
|
|
err_cnt |= t;
|
|
}
|
|
dprintk("error=%d total=%d\n", err_cnt, total_cnt);
|
|
|
|
if (total_cnt == 0)
|
|
*ber = 0;
|
|
else
|
|
*ber = err_cnt * 100 / total_cnt;
|
|
|
|
dprintk("%s: ber=0x%x\n", __func__, *ber);
|
|
return 0;
|
|
}
|
|
|
|
static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
|
|
{
|
|
struct lgs8gxx_state *priv = fe->demodulator_priv;
|
|
|
|
if (priv->config->tuner_address == 0)
|
|
return 0;
|
|
if (enable) {
|
|
u8 v = 0x80 | priv->config->tuner_address;
|
|
return lgs8gxx_write_reg(priv, 0x01, v);
|
|
}
|
|
return lgs8gxx_write_reg(priv, 0x01, 0);
|
|
}
|
|
|
|
static const struct dvb_frontend_ops lgs8gxx_ops = {
|
|
.delsys = { SYS_DTMB },
|
|
.info = {
|
|
.name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
|
|
.frequency_min_hz = 474 * MHz,
|
|
.frequency_max_hz = 858 * MHz,
|
|
.frequency_stepsize_hz = 10 * kHz,
|
|
.caps =
|
|
FE_CAN_FEC_AUTO |
|
|
FE_CAN_QAM_AUTO |
|
|
FE_CAN_TRANSMISSION_MODE_AUTO |
|
|
FE_CAN_GUARD_INTERVAL_AUTO
|
|
},
|
|
|
|
.release = lgs8gxx_release,
|
|
|
|
.init = lgs8gxx_init,
|
|
.write = lgs8gxx_write,
|
|
.i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
|
|
|
|
.set_frontend = lgs8gxx_set_fe,
|
|
.get_tune_settings = lgs8gxx_get_tune_settings,
|
|
|
|
.read_status = lgs8gxx_read_status,
|
|
.read_ber = lgs8gxx_read_ber,
|
|
.read_signal_strength = lgs8gxx_read_signal_strength,
|
|
.read_snr = lgs8gxx_read_snr,
|
|
.read_ucblocks = lgs8gxx_read_ucblocks,
|
|
};
|
|
|
|
struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct lgs8gxx_state *priv = NULL;
|
|
u8 data = 0;
|
|
|
|
dprintk("%s()\n", __func__);
|
|
|
|
if (config == NULL || i2c == NULL)
|
|
return NULL;
|
|
|
|
priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
|
|
if (priv == NULL)
|
|
goto error_out;
|
|
|
|
priv->config = config;
|
|
priv->i2c = i2c;
|
|
|
|
/* check if the demod is there */
|
|
if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
|
|
dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
|
|
__func__, priv->config->demod_address);
|
|
goto error_out;
|
|
}
|
|
|
|
lgs8gxx_read_reg(priv, 1, &data);
|
|
|
|
memcpy(&priv->frontend.ops, &lgs8gxx_ops,
|
|
sizeof(struct dvb_frontend_ops));
|
|
priv->frontend.demodulator_priv = priv;
|
|
|
|
if (config->prod == LGS8GXX_PROD_LGS8G75)
|
|
lgs8g75_init_data(priv);
|
|
|
|
return &priv->frontend;
|
|
|
|
error_out:
|
|
dprintk("%s() error_out\n", __func__);
|
|
kfree(priv);
|
|
return NULL;
|
|
|
|
}
|
|
EXPORT_SYMBOL(lgs8gxx_attach);
|
|
|
|
MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
|
|
MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_FIRMWARE(LGS8GXX_FIRMWARE);
|