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484 lines
11 KiB
484 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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Driver for Philips TDA8083 based QPSK Demodulator |
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Copyright (C) 2001 Convergence Integrated Media GmbH |
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written by Ralph Metzler <[email protected]> |
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adoption to the new DVB frontend API and diagnostic ioctl's |
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by Holger Waechtler <[email protected]> |
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*/ |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/string.h> |
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#include <linux/slab.h> |
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#include <linux/jiffies.h> |
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#include <media/dvb_frontend.h> |
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#include "tda8083.h" |
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struct tda8083_state { |
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struct i2c_adapter* i2c; |
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/* configuration settings */ |
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const struct tda8083_config* config; |
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struct dvb_frontend frontend; |
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}; |
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static int debug; |
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#define dprintk(args...) \ |
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do { \ |
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if (debug) printk(KERN_DEBUG "tda8083: " args); \ |
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} while (0) |
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static u8 tda8083_init_tab [] = { |
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0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea, |
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0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10, |
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0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8, |
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0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00, |
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0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00 |
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}; |
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static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data) |
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{ |
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int ret; |
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u8 buf [] = { reg, data }; |
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struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; |
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ret = i2c_transfer(state->i2c, &msg, 1); |
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if (ret != 1) |
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dprintk ("%s: writereg error (reg %02x, ret == %i)\n", |
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__func__, reg, ret); |
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return (ret != 1) ? -1 : 0; |
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} |
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static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len) |
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{ |
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int ret; |
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struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 }, |
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{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } }; |
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ret = i2c_transfer(state->i2c, msg, 2); |
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if (ret != 2) |
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dprintk ("%s: readreg error (reg %02x, ret == %i)\n", |
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__func__, reg1, ret); |
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return ret == 2 ? 0 : -1; |
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} |
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static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg) |
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{ |
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u8 val; |
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tda8083_readregs (state, reg, &val, 1); |
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return val; |
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} |
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static int tda8083_set_inversion(struct tda8083_state *state, |
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enum fe_spectral_inversion inversion) |
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{ |
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/* XXX FIXME: implement other modes than FEC_AUTO */ |
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if (inversion == INVERSION_AUTO) |
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return 0; |
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return -EINVAL; |
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} |
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static int tda8083_set_fec(struct tda8083_state *state, enum fe_code_rate fec) |
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{ |
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if (fec == FEC_AUTO) |
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return tda8083_writereg (state, 0x07, 0xff); |
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if (fec >= FEC_1_2 && fec <= FEC_8_9) |
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return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec)); |
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return -EINVAL; |
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} |
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static enum fe_code_rate tda8083_get_fec(struct tda8083_state *state) |
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{ |
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u8 index; |
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static enum fe_code_rate fec_tab[] = { |
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FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4, |
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FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 |
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}; |
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index = tda8083_readreg(state, 0x0e) & 0x07; |
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return fec_tab [index]; |
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} |
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static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate) |
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{ |
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u32 ratio; |
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u32 tmp; |
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u8 filter; |
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if (srate > 32000000) |
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srate = 32000000; |
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if (srate < 500000) |
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srate = 500000; |
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filter = 0; |
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if (srate < 24000000) |
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filter = 2; |
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if (srate < 16000000) |
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filter = 3; |
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tmp = 31250 << 16; |
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ratio = tmp / srate; |
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tmp = (tmp % srate) << 8; |
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ratio = (ratio << 8) + tmp / srate; |
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tmp = (tmp % srate) << 8; |
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ratio = (ratio << 8) + tmp / srate; |
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dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio); |
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tda8083_writereg (state, 0x05, filter); |
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tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff); |
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tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff); |
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tda8083_writereg (state, 0x04, (ratio ) & 0xff); |
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tda8083_writereg (state, 0x00, 0x3c); |
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tda8083_writereg (state, 0x00, 0x04); |
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return 1; |
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} |
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static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout) |
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{ |
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unsigned long start = jiffies; |
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while (jiffies - start < timeout && |
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!(tda8083_readreg(state, 0x02) & 0x80)) |
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{ |
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msleep(50); |
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} |
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} |
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static int tda8083_set_tone(struct tda8083_state *state, |
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enum fe_sec_tone_mode tone) |
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{ |
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tda8083_writereg (state, 0x26, 0xf1); |
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switch (tone) { |
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case SEC_TONE_OFF: |
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return tda8083_writereg (state, 0x29, 0x00); |
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case SEC_TONE_ON: |
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return tda8083_writereg (state, 0x29, 0x80); |
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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 tda8083_set_voltage(struct tda8083_state *state, |
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enum fe_sec_voltage voltage) |
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{ |
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switch (voltage) { |
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case SEC_VOLTAGE_13: |
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return tda8083_writereg (state, 0x20, 0x00); |
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case SEC_VOLTAGE_18: |
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return tda8083_writereg (state, 0x20, 0x11); |
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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 tda8083_send_diseqc_burst(struct tda8083_state *state, |
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enum fe_sec_mini_cmd burst) |
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{ |
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switch (burst) { |
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case SEC_MINI_A: |
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tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */ |
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break; |
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case SEC_MINI_B: |
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tda8083_writereg (state, 0x29, (7 << 2)); /* send B */ |
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break; |
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default: |
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return -EINVAL; |
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} |
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tda8083_wait_diseqc_fifo (state, 100); |
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return 0; |
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} |
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static int tda8083_send_diseqc_msg(struct dvb_frontend *fe, |
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struct dvb_diseqc_master_cmd *m) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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int i; |
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tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */ |
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for (i=0; i<m->msg_len; i++) |
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tda8083_writereg (state, 0x23 + i, m->msg[i]); |
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tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */ |
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tda8083_wait_diseqc_fifo (state, 100); |
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return 0; |
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} |
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static int tda8083_read_status(struct dvb_frontend *fe, |
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enum fe_status *status) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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u8 signal = ~tda8083_readreg (state, 0x01); |
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u8 sync = tda8083_readreg (state, 0x02); |
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*status = 0; |
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if (signal > 10) |
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*status |= FE_HAS_SIGNAL; |
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if (sync & 0x01) |
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*status |= FE_HAS_CARRIER; |
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if (sync & 0x02) |
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*status |= FE_HAS_VITERBI; |
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if (sync & 0x10) |
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*status |= FE_HAS_SYNC; |
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if (sync & 0x20) /* frontend can not lock */ |
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*status |= FE_TIMEDOUT; |
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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 tda8083_read_ber(struct dvb_frontend* fe, u32* ber) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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int ret; |
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u8 buf[3]; |
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if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf)))) |
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return ret; |
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*ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2]; |
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return 0; |
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} |
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static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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u8 signal = ~tda8083_readreg (state, 0x01); |
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*strength = (signal << 8) | signal; |
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return 0; |
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} |
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static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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u8 _snr = tda8083_readreg (state, 0x08); |
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*snr = (_snr << 8) | _snr; |
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return 0; |
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} |
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static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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*ucblocks = tda8083_readreg(state, 0x0f); |
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if (*ucblocks == 0xff) |
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*ucblocks = 0xffffffff; |
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return 0; |
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} |
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static int tda8083_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 tda8083_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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tda8083_set_inversion (state, p->inversion); |
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tda8083_set_fec(state, p->fec_inner); |
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tda8083_set_symbolrate(state, p->symbol_rate); |
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tda8083_writereg (state, 0x00, 0x3c); |
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tda8083_writereg (state, 0x00, 0x04); |
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return 0; |
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} |
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static int tda8083_get_frontend(struct dvb_frontend *fe, |
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struct dtv_frontend_properties *p) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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/* FIXME: get symbolrate & frequency offset...*/ |
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/*p->frequency = ???;*/ |
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p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ? |
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INVERSION_ON : INVERSION_OFF; |
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p->fec_inner = tda8083_get_fec(state); |
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/*p->symbol_rate = tda8083_get_symbolrate (state);*/ |
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return 0; |
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} |
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static int tda8083_sleep(struct dvb_frontend* fe) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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tda8083_writereg (state, 0x00, 0x02); |
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return 0; |
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} |
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static int tda8083_init(struct dvb_frontend* fe) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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int i; |
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for (i=0; i<44; i++) |
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tda8083_writereg (state, i, tda8083_init_tab[i]); |
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tda8083_writereg (state, 0x00, 0x3c); |
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tda8083_writereg (state, 0x00, 0x04); |
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return 0; |
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} |
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static int tda8083_diseqc_send_burst(struct dvb_frontend *fe, |
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enum fe_sec_mini_cmd burst) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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tda8083_send_diseqc_burst (state, burst); |
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tda8083_writereg (state, 0x00, 0x3c); |
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tda8083_writereg (state, 0x00, 0x04); |
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return 0; |
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} |
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static int tda8083_diseqc_set_tone(struct dvb_frontend *fe, |
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enum fe_sec_tone_mode tone) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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tda8083_set_tone (state, tone); |
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tda8083_writereg (state, 0x00, 0x3c); |
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tda8083_writereg (state, 0x00, 0x04); |
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return 0; |
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} |
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static int tda8083_diseqc_set_voltage(struct dvb_frontend *fe, |
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enum fe_sec_voltage voltage) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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tda8083_set_voltage (state, voltage); |
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tda8083_writereg (state, 0x00, 0x3c); |
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tda8083_writereg (state, 0x00, 0x04); |
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return 0; |
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} |
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static void tda8083_release(struct dvb_frontend* fe) |
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{ |
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struct tda8083_state* state = fe->demodulator_priv; |
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kfree(state); |
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} |
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static const struct dvb_frontend_ops tda8083_ops; |
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struct dvb_frontend* tda8083_attach(const struct tda8083_config* config, |
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struct i2c_adapter* i2c) |
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{ |
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struct tda8083_state* state = NULL; |
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/* allocate memory for the internal state */ |
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state = kzalloc(sizeof(struct tda8083_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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/* check if the demod is there */ |
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if ((tda8083_readreg(state, 0x00)) != 0x05) goto error; |
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/* create dvb_frontend */ |
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memcpy(&state->frontend.ops, &tda8083_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 const struct dvb_frontend_ops tda8083_ops = { |
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.delsys = { SYS_DVBS }, |
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.info = { |
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.name = "Philips TDA8083 DVB-S", |
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.frequency_min_hz = 920 * MHz, /* TDA8060 */ |
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.frequency_max_hz = 2200 * MHz, /* TDA8060 */ |
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.frequency_stepsize_hz = 125 * kHz, |
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.symbol_rate_min = 12000000, |
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.symbol_rate_max = 30000000, |
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/* .symbol_rate_tolerance = ???,*/ |
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.caps = FE_CAN_INVERSION_AUTO | |
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FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | |
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FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | |
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FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO | |
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FE_CAN_QPSK | FE_CAN_MUTE_TS |
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}, |
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.release = tda8083_release, |
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.init = tda8083_init, |
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.sleep = tda8083_sleep, |
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.set_frontend = tda8083_set_frontend, |
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.get_frontend = tda8083_get_frontend, |
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.read_status = tda8083_read_status, |
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.read_signal_strength = tda8083_read_signal_strength, |
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.read_snr = tda8083_read_snr, |
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.read_ber = tda8083_read_ber, |
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.read_ucblocks = tda8083_read_ucblocks, |
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.diseqc_send_master_cmd = tda8083_send_diseqc_msg, |
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.diseqc_send_burst = tda8083_diseqc_send_burst, |
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.set_tone = tda8083_diseqc_set_tone, |
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.set_voltage = tda8083_diseqc_set_voltage, |
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}; |
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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_DESCRIPTION("Philips TDA8083 DVB-S Demodulator"); |
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MODULE_AUTHOR("Ralph Metzler, Holger Waechtler"); |
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MODULE_LICENSE("GPL"); |
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EXPORT_SYMBOL(tda8083_attach);
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