539 lines
14 KiB
C
539 lines
14 KiB
C
/*
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TDA10023 - DVB-C decoder
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(as used in Philips CU1216-3 NIM and the Reelbox DVB-C tuner card)
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Copyright (C) 2005 Georg Acher, BayCom GmbH (acher at baycom dot de)
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Copyright (c) 2006 Hartmut Birr (e9hack at gmail dot com)
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Remotely based on tda10021.c
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Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
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Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
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Support for TDA10021
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/delay.h>
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#include <linux/errno.h>
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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 <asm/div64.h>
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#include "dvb_frontend.h"
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#include "tda1002x.h"
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struct tda10023_state {
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struct i2c_adapter* i2c;
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/* configuration settings */
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const struct tda1002x_config* config;
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struct dvb_frontend frontend;
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u8 pwm;
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u8 reg0;
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};
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#define dprintk(x...)
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static int verbose;
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#define XTAL 28920000UL
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#define PLL_M 8UL
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#define PLL_P 4UL
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#define PLL_N 1UL
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#define SYSCLK (XTAL*PLL_M/(PLL_N*PLL_P)) // -> 57840000
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static u8 tda10023_inittab[]={
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// reg mask val
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0x2a,0xff,0x02, // PLL3, Bypass, Power Down
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0xff,0x64,0x00, // Sleep 100ms
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0x2a,0xff,0x03, // PLL3, Bypass, Power Down
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0xff,0x64,0x00, // Sleep 100ms
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0x28,0xff,PLL_M-1, // PLL1 M=8
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0x29,0xff,((PLL_P-1)<<6)|(PLL_N-1), // PLL2
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0x00,0xff,0x23, // GPR FSAMPLING=1
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0x2a,0xff,0x08, // PLL3 PSACLK=1
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0xff,0x64,0x00, // Sleep 100ms
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0x1f,0xff,0x00, // RESET
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0xff,0x64,0x00, // Sleep 100ms
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0xe6,0x0c,0x04, // RSCFG_IND
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0x10,0xc0,0x80, // DECDVBCFG1 PBER=1
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0x0e,0xff,0x82, // GAIN1
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0x03,0x08,0x08, // CLKCONF DYN=1
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0x2e,0xbf,0x30, // AGCCONF2 TRIAGC=0,POSAGC=ENAGCIF=1 PPWMTUN=0 PPWMIF=0
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0x01,0xff,0x30, // AGCREF
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0x1e,0x84,0x84, // CONTROL SACLK_ON=1
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0x1b,0xff,0xc8, // ADC TWOS=1
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0x3b,0xff,0xff, // IFMAX
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0x3c,0xff,0x00, // IFMIN
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0x34,0xff,0x00, // PWMREF
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0x35,0xff,0xff, // TUNMAX
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0x36,0xff,0x00, // TUNMIN
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0x06,0xff,0x7f, // EQCONF1 POSI=7 ENADAPT=ENEQUAL=DFE=1 // 0x77
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0x1c,0x30,0x30, // EQCONF2 STEPALGO=SGNALGO=1
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0x37,0xff,0xf6, // DELTAF_LSB
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0x38,0xff,0xff, // DELTAF_MSB
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0x02,0xff,0x93, // AGCCONF1 IFS=1 KAGCIF=2 KAGCTUN=3
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0x2d,0xff,0xf6, // SWEEP SWPOS=1 SWDYN=7 SWSTEP=1 SWLEN=2
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0x04,0x10,0x00, // SWRAMP=1
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0x12,0xff,0xa1, // INTP1 POCLKP=1 FEL=1 MFS=0
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0x2b,0x01,0xa1, // INTS1
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0x20,0xff,0x04, // INTP2 SWAPP=? MSBFIRSTP=? INTPSEL=?
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0x2c,0xff,0x0d, // INTP/S TRIP=0 TRIS=0
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0xc4,0xff,0x00,
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0xc3,0x30,0x00,
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0xb5,0xff,0x19, // ERAGC_THD
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0x00,0x03,0x01, // GPR, CLBS soft reset
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0x00,0x03,0x03, // GPR, CLBS soft reset
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0xff,0x64,0x00, // Sleep 100ms
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0xff,0xff,0xff
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};
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static u8 tda10023_readreg (struct tda10023_state* state, u8 reg)
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{
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u8 b0 [] = { reg };
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u8 b1 [] = { 0 };
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struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
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{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
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int ret;
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ret = i2c_transfer (state->i2c, msg, 2);
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if (ret != 2) {
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int num = state->frontend.dvb ? state->frontend.dvb->num : -1;
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printk(KERN_ERR "DVB: TDA10023(%d): %s: readreg error "
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"(reg == 0x%02x, ret == %i)\n",
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num, __func__, reg, ret);
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}
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return b1[0];
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}
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static int tda10023_writereg (struct tda10023_state* state, u8 reg, u8 data)
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{
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u8 buf[] = { reg, data };
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struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
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int ret;
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ret = i2c_transfer (state->i2c, &msg, 1);
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if (ret != 1) {
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int num = state->frontend.dvb ? state->frontend.dvb->num : -1;
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printk(KERN_ERR "DVB: TDA10023(%d): %s, writereg error "
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"(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
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num, __func__, reg, data, ret);
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}
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return (ret != 1) ? -EREMOTEIO : 0;
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}
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static int tda10023_writebit (struct tda10023_state* state, u8 reg, u8 mask,u8 data)
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{
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if (mask==0xff)
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return tda10023_writereg(state, reg, data);
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else {
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u8 val;
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val=tda10023_readreg(state,reg);
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val&=~mask;
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val|=(data&mask);
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return tda10023_writereg(state, reg, val);
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}
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}
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static void tda10023_writetab(struct tda10023_state* state, u8* tab)
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{
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u8 r,m,v;
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while (1) {
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r=*tab++;
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m=*tab++;
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v=*tab++;
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if (r==0xff) {
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if (m==0xff)
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break;
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else
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msleep(m);
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}
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else
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tda10023_writebit(state,r,m,v);
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}
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}
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//get access to tuner
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static int lock_tuner(struct tda10023_state* state)
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{
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u8 buf[2] = { 0x0f, 0xc0 };
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struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
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if(i2c_transfer(state->i2c, &msg, 1) != 1)
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{
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printk("tda10023: lock tuner fails\n");
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return -EREMOTEIO;
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}
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return 0;
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}
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//release access from tuner
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static int unlock_tuner(struct tda10023_state* state)
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{
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u8 buf[2] = { 0x0f, 0x40 };
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struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
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if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
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{
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printk("tda10023: unlock tuner fails\n");
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return -EREMOTEIO;
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}
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return 0;
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}
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static int tda10023_setup_reg0 (struct tda10023_state* state, u8 reg0)
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{
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reg0 |= state->reg0 & 0x63;
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tda10023_writereg (state, 0x00, reg0 & 0xfe);
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tda10023_writereg (state, 0x00, reg0 | 0x01);
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state->reg0 = reg0;
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return 0;
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}
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static int tda10023_set_symbolrate (struct tda10023_state* state, u32 sr)
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{
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s32 BDR;
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s32 BDRI;
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s16 SFIL=0;
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u16 NDEC = 0;
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if (sr < (u32)(SYSCLK/98.40)) {
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NDEC=3;
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SFIL=1;
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} else if (sr<(u32)(SYSCLK/64.0)) {
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NDEC=3;
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SFIL=0;
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} else if (sr<(u32)(SYSCLK/49.2)) {
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NDEC=2;
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SFIL=1;
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} else if (sr<(u32)(SYSCLK/32.0)) {
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NDEC=2;
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SFIL=0;
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} else if (sr<(u32)(SYSCLK/24.6)) {
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NDEC=1;
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SFIL=1;
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} else if (sr<(u32)(SYSCLK/16.0)) {
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NDEC=1;
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SFIL=0;
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} else if (sr<(u32)(SYSCLK/12.3)) {
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NDEC=0;
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SFIL=1;
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}
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BDRI=SYSCLK*16;
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BDRI>>=NDEC;
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BDRI +=sr/2;
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BDRI /=sr;
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if (BDRI>255)
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BDRI=255;
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{
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u64 BDRX;
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BDRX=1<<(24+NDEC);
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BDRX*=sr;
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do_div(BDRX,SYSCLK); // BDRX/=SYSCLK;
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BDR=(s32)BDRX;
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}
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// printk("Symbolrate %i, BDR %i BDRI %i, NDEC %i\n",sr,BDR,BDRI,NDEC);
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tda10023_writebit (state, 0x03, 0xc0, NDEC<<6);
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tda10023_writereg (state, 0x0a, BDR&255);
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tda10023_writereg (state, 0x0b, (BDR>>8)&255);
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tda10023_writereg (state, 0x0c, (BDR>>16)&31);
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tda10023_writereg (state, 0x0d, BDRI);
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tda10023_writereg (state, 0x3d, (SFIL<<7));
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return 0;
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}
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static int tda10023_init (struct dvb_frontend *fe)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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dprintk("DVB: TDA10023(%d): init chip\n", fe->adapter->num);
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tda10023_writetab(state, tda10023_inittab);
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return 0;
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}
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static int tda10023_set_parameters (struct dvb_frontend *fe,
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struct dvb_frontend_parameters *p)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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static int qamvals[6][6] = {
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// QAM LOCKTHR MSETH AREF AGCREFNYQ ERAGCNYQ_THD
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{ (5<<2), 0x78, 0x8c, 0x96, 0x78, 0x4c }, // 4 QAM
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{ (0<<2), 0x87, 0xa2, 0x91, 0x8c, 0x57 }, // 16 QAM
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{ (1<<2), 0x64, 0x74, 0x96, 0x8c, 0x57 }, // 32 QAM
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{ (2<<2), 0x46, 0x43, 0x6a, 0x6a, 0x44 }, // 64 QAM
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{ (3<<2), 0x36, 0x34, 0x7e, 0x78, 0x4c }, // 128 QAM
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{ (4<<2), 0x26, 0x23, 0x6c, 0x5c, 0x3c }, // 256 QAM
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};
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int qam = p->u.qam.modulation;
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if (qam < 0 || qam > 5)
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return -EINVAL;
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if (fe->ops.tuner_ops.set_params) {
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fe->ops.tuner_ops.set_params(fe, p);
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if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
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}
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tda10023_set_symbolrate (state, p->u.qam.symbol_rate);
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tda10023_writereg (state, 0x05, qamvals[qam][1]);
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tda10023_writereg (state, 0x08, qamvals[qam][2]);
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tda10023_writereg (state, 0x09, qamvals[qam][3]);
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tda10023_writereg (state, 0xb4, qamvals[qam][4]);
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tda10023_writereg (state, 0xb6, qamvals[qam][5]);
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// tda10023_writereg (state, 0x04, (p->inversion?0x12:0x32));
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// tda10023_writebit (state, 0x04, 0x60, (p->inversion?0:0x20));
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tda10023_writebit (state, 0x04, 0x40, 0x40);
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tda10023_setup_reg0 (state, qamvals[qam][0]);
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return 0;
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}
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static int tda10023_read_status(struct dvb_frontend* fe, fe_status_t* status)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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int sync;
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*status = 0;
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//0x11[1] == CARLOCK -> Carrier locked
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//0x11[2] == FSYNC -> Frame synchronisation
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//0x11[3] == FEL -> Front End locked
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//0x11[6] == NODVB -> DVB Mode Information
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sync = tda10023_readreg (state, 0x11);
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if (sync & 2)
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*status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
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if (sync & 4)
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*status |= FE_HAS_SYNC|FE_HAS_VITERBI;
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if (sync & 8)
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*status |= FE_HAS_LOCK;
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return 0;
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}
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static int tda10023_read_ber(struct dvb_frontend* fe, u32* ber)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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u8 a,b,c;
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a=tda10023_readreg(state, 0x14);
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b=tda10023_readreg(state, 0x15);
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c=tda10023_readreg(state, 0x16)&0xf;
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tda10023_writebit (state, 0x10, 0xc0, 0x00);
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*ber = a | (b<<8)| (c<<16);
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return 0;
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}
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static int tda10023_read_signal_strength(struct dvb_frontend* fe, u16* strength)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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u8 ifgain=tda10023_readreg(state, 0x2f);
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u16 gain = ((255-tda10023_readreg(state, 0x17))) + (255-ifgain)/16;
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// Max raw value is about 0xb0 -> Normalize to >0xf0 after 0x90
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if (gain>0x90)
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gain=gain+2*(gain-0x90);
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if (gain>255)
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gain=255;
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*strength = (gain<<8)|gain;
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return 0;
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}
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static int tda10023_read_snr(struct dvb_frontend* fe, u16* snr)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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u8 quality = ~tda10023_readreg(state, 0x18);
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*snr = (quality << 8) | quality;
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return 0;
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}
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static int tda10023_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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u8 a,b,c,d;
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a= tda10023_readreg (state, 0x74);
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b= tda10023_readreg (state, 0x75);
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c= tda10023_readreg (state, 0x76);
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d= tda10023_readreg (state, 0x77);
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*ucblocks = a | (b<<8)|(c<<16)|(d<<24);
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tda10023_writebit (state, 0x10, 0x20,0x00);
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tda10023_writebit (state, 0x10, 0x20,0x20);
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tda10023_writebit (state, 0x13, 0x01, 0x00);
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return 0;
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}
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static int tda10023_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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int sync,inv;
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s8 afc = 0;
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sync = tda10023_readreg(state, 0x11);
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afc = tda10023_readreg(state, 0x19);
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inv = tda10023_readreg(state, 0x04);
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if (verbose) {
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/* AFC only valid when carrier has been recovered */
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printk(sync & 2 ? "DVB: TDA10023(%d): AFC (%d) %dHz\n" :
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"DVB: TDA10023(%d): [AFC (%d) %dHz]\n",
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state->frontend.dvb->num, afc,
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-((s32)p->u.qam.symbol_rate * afc) >> 10);
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}
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p->inversion = (inv&0x20?0:1);
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p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16;
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p->u.qam.fec_inner = FEC_NONE;
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p->frequency = ((p->frequency + 31250) / 62500) * 62500;
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if (sync & 2)
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p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10;
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return 0;
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}
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static int tda10023_sleep(struct dvb_frontend* fe)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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tda10023_writereg (state, 0x1b, 0x02); /* pdown ADC */
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tda10023_writereg (state, 0x00, 0x80); /* standby */
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return 0;
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}
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static int tda10023_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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if (enable) {
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lock_tuner(state);
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} else {
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unlock_tuner(state);
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}
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return 0;
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}
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static void tda10023_release(struct dvb_frontend* fe)
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{
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struct tda10023_state* state = fe->demodulator_priv;
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kfree(state);
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}
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static struct dvb_frontend_ops tda10023_ops;
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struct dvb_frontend* tda10023_attach(const struct tda1002x_config* config,
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struct i2c_adapter* i2c,
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u8 pwm)
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{
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struct tda10023_state* state = NULL;
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int i;
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/* allocate memory for the internal state */
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state = kzalloc(sizeof(struct tda10023_state), GFP_KERNEL);
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if (state == NULL) goto error;
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/* setup the state */
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state->config = config;
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state->i2c = i2c;
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memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
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state->pwm = pwm;
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for (i=0; i < ARRAY_SIZE(tda10023_inittab);i+=3) {
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if (tda10023_inittab[i] == 0x00) {
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state->reg0 = tda10023_inittab[i+2];
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break;
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}
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}
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// Wakeup if in standby
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tda10023_writereg (state, 0x00, 0x33);
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/* check if the demod is there */
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if ((tda10023_readreg(state, 0x1a) & 0xf0) != 0x70) goto error;
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/* create dvb_frontend */
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memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
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state->frontend.demodulator_priv = state;
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return &state->frontend;
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error:
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kfree(state);
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return NULL;
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}
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static struct dvb_frontend_ops tda10023_ops = {
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.info = {
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.name = "Philips TDA10023 DVB-C",
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.type = FE_QAM,
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.frequency_stepsize = 62500,
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.frequency_min = 47000000,
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.frequency_max = 862000000,
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.symbol_rate_min = (SYSCLK/2)/64, /* SACLK/64 == (SYSCLK/2)/64 */
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.symbol_rate_max = (SYSCLK/2)/4, /* SACLK/4 */
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.caps = 0x400 | //FE_CAN_QAM_4
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FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
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FE_CAN_QAM_128 | FE_CAN_QAM_256 |
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FE_CAN_FEC_AUTO
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},
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.release = tda10023_release,
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.init = tda10023_init,
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.sleep = tda10023_sleep,
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.i2c_gate_ctrl = tda10023_i2c_gate_ctrl,
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.set_frontend = tda10023_set_parameters,
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.get_frontend = tda10023_get_frontend,
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.read_status = tda10023_read_status,
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.read_ber = tda10023_read_ber,
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.read_signal_strength = tda10023_read_signal_strength,
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.read_snr = tda10023_read_snr,
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.read_ucblocks = tda10023_read_ucblocks,
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};
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MODULE_DESCRIPTION("Philips TDA10023 DVB-C demodulator driver");
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MODULE_AUTHOR("Georg Acher, Hartmut Birr");
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MODULE_LICENSE("GPL");
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EXPORT_SYMBOL(tda10023_attach);
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