forked from Minki/linux
bd336e6344
These are immutable. Making them "const" allows the compiler to move them to the "rodata" section. Note that cxd2841er_t_c_ops cannot be made "const", because cxd2841er_attach() modifies it. Ouch! [mchehab@s-opensource.com: fix merge conflicts] Signed-off-by: Max Kellermann <max.kellermann@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
557 lines
14 KiB
C
557 lines
14 KiB
C
/*
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Driver for VES1893 and VES1993 QPSK Demodulators
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Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
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Copyright (C) 2001 Ronny Strutz <3des@elitedvb.de>
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Copyright (C) 2002 Dennis Noermann <dennis.noermann@noernet.de>
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Copyright (C) 2002-2003 Andreas Oberritter <obi@linuxtv.org>
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include "dvb_frontend.h"
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#include "ves1x93.h"
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struct ves1x93_state {
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struct i2c_adapter* i2c;
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/* configuration settings */
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const struct ves1x93_config* config;
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struct dvb_frontend frontend;
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/* previous uncorrected block counter */
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enum fe_spectral_inversion inversion;
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u8 *init_1x93_tab;
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u8 *init_1x93_wtab;
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u8 tab_size;
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u8 demod_type;
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u32 frequency;
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};
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static int debug;
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#define dprintk if (debug) printk
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#define DEMOD_VES1893 0
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#define DEMOD_VES1993 1
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static u8 init_1893_tab [] = {
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0x01, 0xa4, 0x35, 0x80, 0x2a, 0x0b, 0x55, 0xc4,
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0x09, 0x69, 0x00, 0x86, 0x4c, 0x28, 0x7f, 0x00,
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0x00, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x80, 0x00, 0x21, 0xb0, 0x14, 0x00, 0xdc, 0x00,
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0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x55, 0x00, 0x00, 0x7f, 0x00
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};
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static u8 init_1993_tab [] = {
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0x00, 0x9c, 0x35, 0x80, 0x6a, 0x09, 0x72, 0x8c,
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0x09, 0x6b, 0x00, 0x00, 0x4c, 0x08, 0x00, 0x00,
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0x00, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x80, 0x40, 0x21, 0xb0, 0x00, 0x00, 0x00, 0x10,
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0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x55, 0x03, 0x00, 0x00, 0x00, 0x00, 0x03,
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0x00, 0x00, 0x0e, 0x80, 0x00
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};
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static u8 init_1893_wtab[] =
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{
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1,1,1,1,1,1,1,1, 1,1,0,0,1,1,0,0,
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0,1,0,0,0,0,0,0, 1,0,1,1,0,0,0,1,
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1,1,1,0,0,0,0,0, 0,0,1,1,0,0,0,0,
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1,1,1,0,1,1
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};
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static u8 init_1993_wtab[] =
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{
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1,1,1,1,1,1,1,1, 1,1,0,0,1,1,0,0,
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0,1,0,0,0,0,0,0, 1,1,1,1,0,0,0,1,
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1,1,1,0,0,0,0,0, 0,0,1,1,0,0,0,0,
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1,1,1,0,1,1,1,1, 1,1,1,1,1
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};
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static int ves1x93_writereg (struct ves1x93_state* state, u8 reg, u8 data)
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{
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u8 buf [] = { 0x00, reg, data };
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struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 3 };
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int err;
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if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
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dprintk ("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
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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 u8 ves1x93_readreg (struct ves1x93_state* state, u8 reg)
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{
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int ret;
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u8 b0 [] = { 0x00, 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 = 2 },
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{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
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ret = i2c_transfer (state->i2c, msg, 2);
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if (ret != 2) return ret;
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return b1[0];
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}
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static int ves1x93_clr_bit (struct ves1x93_state* state)
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{
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msleep(10);
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ves1x93_writereg (state, 0, state->init_1x93_tab[0] & 0xfe);
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ves1x93_writereg (state, 0, state->init_1x93_tab[0]);
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msleep(50);
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return 0;
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}
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static int ves1x93_set_inversion(struct ves1x93_state *state,
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enum fe_spectral_inversion inversion)
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{
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u8 val;
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/*
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* inversion on/off are interchanged because i and q seem to
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* be swapped on the hardware
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*/
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switch (inversion) {
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case INVERSION_OFF:
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val = 0xc0;
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break;
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case INVERSION_ON:
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val = 0x80;
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break;
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case INVERSION_AUTO:
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val = 0x00;
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break;
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default:
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return -EINVAL;
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}
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return ves1x93_writereg (state, 0x0c, (state->init_1x93_tab[0x0c] & 0x3f) | val);
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}
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static int ves1x93_set_fec(struct ves1x93_state *state, enum fe_code_rate fec)
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{
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if (fec == FEC_AUTO)
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return ves1x93_writereg (state, 0x0d, 0x08);
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else if (fec < FEC_1_2 || fec > FEC_8_9)
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return -EINVAL;
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else
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return ves1x93_writereg (state, 0x0d, fec - FEC_1_2);
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}
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static enum fe_code_rate ves1x93_get_fec(struct ves1x93_state *state)
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{
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return FEC_1_2 + ((ves1x93_readreg (state, 0x0d) >> 4) & 0x7);
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}
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static int ves1x93_set_symbolrate (struct ves1x93_state* state, u32 srate)
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{
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u32 BDR;
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u32 ratio;
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u8 ADCONF, FCONF, FNR, AGCR;
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u32 BDRI;
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u32 tmp;
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u32 FIN;
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dprintk("%s: srate == %d\n", __func__, (unsigned int) srate);
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if (srate > state->config->xin/2)
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srate = state->config->xin/2;
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if (srate < 500000)
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srate = 500000;
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#define MUL (1UL<<26)
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FIN = (state->config->xin + 6000) >> 4;
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tmp = srate << 6;
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ratio = tmp / FIN;
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tmp = (tmp % FIN) << 8;
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ratio = (ratio << 8) + tmp / FIN;
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tmp = (tmp % FIN) << 8;
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ratio = (ratio << 8) + tmp / FIN;
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FNR = 0xff;
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if (ratio < MUL/3) FNR = 0;
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if (ratio < (MUL*11)/50) FNR = 1;
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if (ratio < MUL/6) FNR = 2;
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if (ratio < MUL/9) FNR = 3;
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if (ratio < MUL/12) FNR = 4;
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if (ratio < (MUL*11)/200) FNR = 5;
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if (ratio < MUL/24) FNR = 6;
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if (ratio < (MUL*27)/1000) FNR = 7;
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if (ratio < MUL/48) FNR = 8;
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if (ratio < (MUL*137)/10000) FNR = 9;
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if (FNR == 0xff) {
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ADCONF = 0x89;
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FCONF = 0x80;
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FNR = 0;
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} else {
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ADCONF = 0x81;
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FCONF = 0x88 | (FNR >> 1) | ((FNR & 0x01) << 5);
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/*FCONF = 0x80 | ((FNR & 0x01) << 5) | (((FNR > 1) & 0x03) << 3) | ((FNR >> 1) & 0x07);*/
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}
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BDR = (( (ratio << (FNR >> 1)) >> 4) + 1) >> 1;
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BDRI = ( ((FIN << 8) / ((srate << (FNR >> 1)) >> 2)) + 1) >> 1;
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dprintk("FNR= %d\n", FNR);
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dprintk("ratio= %08x\n", (unsigned int) ratio);
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dprintk("BDR= %08x\n", (unsigned int) BDR);
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dprintk("BDRI= %02x\n", (unsigned int) BDRI);
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if (BDRI > 0xff)
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BDRI = 0xff;
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ves1x93_writereg (state, 0x06, 0xff & BDR);
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ves1x93_writereg (state, 0x07, 0xff & (BDR >> 8));
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ves1x93_writereg (state, 0x08, 0x0f & (BDR >> 16));
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ves1x93_writereg (state, 0x09, BDRI);
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ves1x93_writereg (state, 0x20, ADCONF);
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ves1x93_writereg (state, 0x21, FCONF);
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AGCR = state->init_1x93_tab[0x05];
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if (state->config->invert_pwm)
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AGCR |= 0x20;
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if (srate < 6000000)
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AGCR |= 0x80;
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else
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AGCR &= ~0x80;
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ves1x93_writereg (state, 0x05, AGCR);
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/* ves1993 hates this, will lose lock */
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if (state->demod_type != DEMOD_VES1993)
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ves1x93_clr_bit (state);
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return 0;
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}
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static int ves1x93_init (struct dvb_frontend* fe)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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int i;
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int val;
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dprintk("%s: init chip\n", __func__);
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for (i = 0; i < state->tab_size; i++) {
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if (state->init_1x93_wtab[i]) {
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val = state->init_1x93_tab[i];
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if (state->config->invert_pwm && (i == 0x05)) val |= 0x20; /* invert PWM */
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ves1x93_writereg (state, i, val);
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}
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}
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return 0;
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}
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static int ves1x93_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage voltage)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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switch (voltage) {
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case SEC_VOLTAGE_13:
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return ves1x93_writereg (state, 0x1f, 0x20);
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case SEC_VOLTAGE_18:
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return ves1x93_writereg (state, 0x1f, 0x30);
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case SEC_VOLTAGE_OFF:
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return ves1x93_writereg (state, 0x1f, 0x00);
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default:
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return -EINVAL;
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}
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}
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static int ves1x93_read_status(struct dvb_frontend *fe,
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enum fe_status *status)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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u8 sync = ves1x93_readreg (state, 0x0e);
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/*
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* The ves1893 sometimes returns sync values that make no sense,
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* because, e.g., the SIGNAL bit is 0, while some of the higher
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* bits are 1 (and how can there be a CARRIER w/o a SIGNAL?).
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* Tests showed that the VITERBI and SYNC bits are returned
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* reliably, while the SIGNAL and CARRIER bits ar sometimes wrong.
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* If such a case occurs, we read the value again, until we get a
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* valid value.
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*/
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int maxtry = 10; /* just for safety - let's not get stuck here */
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while ((sync & 0x03) != 0x03 && (sync & 0x0c) && maxtry--) {
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msleep(10);
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sync = ves1x93_readreg (state, 0x0e);
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}
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*status = 0;
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if (sync & 1)
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*status |= FE_HAS_SIGNAL;
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if (sync & 2)
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*status |= FE_HAS_CARRIER;
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if (sync & 4)
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*status |= FE_HAS_VITERBI;
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if (sync & 8)
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*status |= FE_HAS_SYNC;
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if ((sync & 0x1f) == 0x1f)
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*status |= FE_HAS_LOCK;
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return 0;
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}
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static int ves1x93_read_ber(struct dvb_frontend* fe, u32* ber)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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*ber = ves1x93_readreg (state, 0x15);
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*ber |= (ves1x93_readreg (state, 0x16) << 8);
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*ber |= ((ves1x93_readreg (state, 0x17) & 0x0F) << 16);
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*ber *= 10;
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return 0;
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}
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static int ves1x93_read_signal_strength(struct dvb_frontend* fe, u16* strength)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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u8 signal = ~ves1x93_readreg (state, 0x0b);
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*strength = (signal << 8) | signal;
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return 0;
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}
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static int ves1x93_read_snr(struct dvb_frontend* fe, u16* snr)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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u8 _snr = ~ves1x93_readreg (state, 0x1c);
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*snr = (_snr << 8) | _snr;
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return 0;
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}
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static int ves1x93_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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*ucblocks = ves1x93_readreg (state, 0x18) & 0x7f;
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if (*ucblocks == 0x7f)
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*ucblocks = 0xffffffff; /* counter overflow... */
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ves1x93_writereg (state, 0x18, 0x00); /* reset the counter */
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ves1x93_writereg (state, 0x18, 0x80); /* dto. */
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return 0;
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}
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static int ves1x93_set_frontend(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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struct ves1x93_state* state = fe->demodulator_priv;
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if (fe->ops.tuner_ops.set_params) {
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fe->ops.tuner_ops.set_params(fe);
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if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
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}
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ves1x93_set_inversion (state, p->inversion);
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ves1x93_set_fec(state, p->fec_inner);
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ves1x93_set_symbolrate(state, p->symbol_rate);
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state->inversion = p->inversion;
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state->frequency = p->frequency;
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return 0;
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}
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static int ves1x93_get_frontend(struct dvb_frontend *fe,
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struct dtv_frontend_properties *p)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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int afc;
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afc = ((int)((char)(ves1x93_readreg (state, 0x0a) << 1)))/2;
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afc = (afc * (int)(p->symbol_rate/1000/8))/16;
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p->frequency = state->frequency - afc;
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/*
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* inversion indicator is only valid
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* if auto inversion was used
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*/
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if (state->inversion == INVERSION_AUTO)
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p->inversion = (ves1x93_readreg (state, 0x0f) & 2) ?
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INVERSION_OFF : INVERSION_ON;
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p->fec_inner = ves1x93_get_fec(state);
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/* XXX FIXME: timing offset !! */
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return 0;
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}
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static int ves1x93_sleep(struct dvb_frontend* fe)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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return ves1x93_writereg (state, 0x00, 0x08);
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}
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static void ves1x93_release(struct dvb_frontend* fe)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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kfree(state);
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}
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static int ves1x93_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
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{
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struct ves1x93_state* state = fe->demodulator_priv;
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if (enable) {
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return ves1x93_writereg(state, 0x00, 0x11);
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} else {
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return ves1x93_writereg(state, 0x00, 0x01);
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}
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}
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static const struct dvb_frontend_ops ves1x93_ops;
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struct dvb_frontend* ves1x93_attach(const struct ves1x93_config* config,
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struct i2c_adapter* i2c)
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{
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struct ves1x93_state* state = NULL;
|
|
u8 identity;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct ves1x93_state), GFP_KERNEL);
|
|
if (state == NULL) goto error;
|
|
|
|
/* setup the state */
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
state->inversion = INVERSION_OFF;
|
|
|
|
/* check if the demod is there + identify it */
|
|
identity = ves1x93_readreg(state, 0x1e);
|
|
switch (identity) {
|
|
case 0xdc: /* VES1893A rev1 */
|
|
printk("ves1x93: Detected ves1893a rev1\n");
|
|
state->demod_type = DEMOD_VES1893;
|
|
state->init_1x93_tab = init_1893_tab;
|
|
state->init_1x93_wtab = init_1893_wtab;
|
|
state->tab_size = sizeof(init_1893_tab);
|
|
break;
|
|
|
|
case 0xdd: /* VES1893A rev2 */
|
|
printk("ves1x93: Detected ves1893a rev2\n");
|
|
state->demod_type = DEMOD_VES1893;
|
|
state->init_1x93_tab = init_1893_tab;
|
|
state->init_1x93_wtab = init_1893_wtab;
|
|
state->tab_size = sizeof(init_1893_tab);
|
|
break;
|
|
|
|
case 0xde: /* VES1993 */
|
|
printk("ves1x93: Detected ves1993\n");
|
|
state->demod_type = DEMOD_VES1993;
|
|
state->init_1x93_tab = init_1993_tab;
|
|
state->init_1x93_wtab = init_1993_wtab;
|
|
state->tab_size = sizeof(init_1993_tab);
|
|
break;
|
|
|
|
default:
|
|
goto error;
|
|
}
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &ves1x93_ops, sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
|
|
error:
|
|
kfree(state);
|
|
return NULL;
|
|
}
|
|
|
|
static const struct dvb_frontend_ops ves1x93_ops = {
|
|
.delsys = { SYS_DVBS },
|
|
.info = {
|
|
.name = "VLSI VES1x93 DVB-S",
|
|
.frequency_min = 950000,
|
|
.frequency_max = 2150000,
|
|
.frequency_stepsize = 125, /* kHz for QPSK frontends */
|
|
.frequency_tolerance = 29500,
|
|
.symbol_rate_min = 1000000,
|
|
.symbol_rate_max = 45000000,
|
|
/* .symbol_rate_tolerance = ???,*/
|
|
.caps = FE_CAN_INVERSION_AUTO |
|
|
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
|
|
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
|
|
FE_CAN_QPSK
|
|
},
|
|
|
|
.release = ves1x93_release,
|
|
|
|
.init = ves1x93_init,
|
|
.sleep = ves1x93_sleep,
|
|
.i2c_gate_ctrl = ves1x93_i2c_gate_ctrl,
|
|
|
|
.set_frontend = ves1x93_set_frontend,
|
|
.get_frontend = ves1x93_get_frontend,
|
|
|
|
.read_status = ves1x93_read_status,
|
|
.read_ber = ves1x93_read_ber,
|
|
.read_signal_strength = ves1x93_read_signal_strength,
|
|
.read_snr = ves1x93_read_snr,
|
|
.read_ucblocks = ves1x93_read_ucblocks,
|
|
|
|
.set_voltage = ves1x93_set_voltage,
|
|
};
|
|
|
|
module_param(debug, int, 0644);
|
|
|
|
MODULE_DESCRIPTION("VLSI VES1x93 DVB-S Demodulator driver");
|
|
MODULE_AUTHOR("Ralph Metzler");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
EXPORT_SYMBOL(ves1x93_attach);
|