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503 lines
11 KiB
503 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* mxl111sf-tuner.c - driver for the MaxLinear MXL111SF CMOS tuner |
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* |
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* Copyright (C) 2010-2014 Michael Krufky <[email protected]> |
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*/ |
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#include "mxl111sf-tuner.h" |
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#include "mxl111sf-phy.h" |
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#include "mxl111sf-reg.h" |
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/* debug */ |
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static int mxl111sf_tuner_debug; |
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module_param_named(debug, mxl111sf_tuner_debug, int, 0644); |
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MODULE_PARM_DESC(debug, "set debugging level (1=info (or-able))."); |
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#define mxl_dbg(fmt, arg...) \ |
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if (mxl111sf_tuner_debug) \ |
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mxl_printk(KERN_DEBUG, fmt, ##arg) |
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/* ------------------------------------------------------------------------ */ |
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struct mxl111sf_tuner_state { |
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struct mxl111sf_state *mxl_state; |
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const struct mxl111sf_tuner_config *cfg; |
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enum mxl_if_freq if_freq; |
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u32 frequency; |
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u32 bandwidth; |
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}; |
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static int mxl111sf_tuner_read_reg(struct mxl111sf_tuner_state *state, |
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u8 addr, u8 *data) |
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{ |
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return (state->cfg->read_reg) ? |
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state->cfg->read_reg(state->mxl_state, addr, data) : |
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-EINVAL; |
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} |
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static int mxl111sf_tuner_write_reg(struct mxl111sf_tuner_state *state, |
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u8 addr, u8 data) |
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{ |
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return (state->cfg->write_reg) ? |
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state->cfg->write_reg(state->mxl_state, addr, data) : |
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-EINVAL; |
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} |
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static int mxl111sf_tuner_program_regs(struct mxl111sf_tuner_state *state, |
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struct mxl111sf_reg_ctrl_info *ctrl_reg_info) |
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{ |
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return (state->cfg->program_regs) ? |
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state->cfg->program_regs(state->mxl_state, ctrl_reg_info) : |
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-EINVAL; |
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} |
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static int mxl1x1sf_tuner_top_master_ctrl(struct mxl111sf_tuner_state *state, |
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int onoff) |
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{ |
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return (state->cfg->top_master_ctrl) ? |
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state->cfg->top_master_ctrl(state->mxl_state, onoff) : |
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-EINVAL; |
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} |
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/* ------------------------------------------------------------------------ */ |
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static struct mxl111sf_reg_ctrl_info mxl_phy_tune_rf[] = { |
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{0x1d, 0x7f, 0x00}, /* channel bandwidth section 1/2/3, |
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DIG_MODEINDEX, _A, _CSF, */ |
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{0x1e, 0xff, 0x00}, /* channel frequency (lo and fractional) */ |
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{0x1f, 0xff, 0x00}, /* channel frequency (hi for integer portion) */ |
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{0, 0, 0} |
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}; |
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/* ------------------------------------------------------------------------ */ |
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static struct mxl111sf_reg_ctrl_info *mxl111sf_calc_phy_tune_regs(u32 freq, |
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u8 bw) |
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{ |
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u8 filt_bw; |
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/* set channel bandwidth */ |
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switch (bw) { |
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case 0: /* ATSC */ |
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filt_bw = 25; |
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break; |
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case 1: /* QAM */ |
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filt_bw = 69; |
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break; |
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case 6: |
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filt_bw = 21; |
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break; |
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case 7: |
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filt_bw = 42; |
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break; |
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case 8: |
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filt_bw = 63; |
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break; |
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default: |
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pr_err("%s: invalid bandwidth setting!", __func__); |
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return NULL; |
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} |
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/* calculate RF channel */ |
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freq /= 1000000; |
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freq *= 64; |
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#if 0 |
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/* do round */ |
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freq += 0.5; |
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#endif |
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/* set bandwidth */ |
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mxl_phy_tune_rf[0].data = filt_bw; |
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/* set RF */ |
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mxl_phy_tune_rf[1].data = (freq & 0xff); |
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mxl_phy_tune_rf[2].data = (freq >> 8) & 0xff; |
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/* start tune */ |
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return mxl_phy_tune_rf; |
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} |
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static int mxl1x1sf_tuner_set_if_output_freq(struct mxl111sf_tuner_state *state) |
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{ |
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int ret; |
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u8 ctrl; |
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#if 0 |
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u16 iffcw; |
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u32 if_freq; |
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#endif |
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mxl_dbg("(IF polarity = %d, IF freq = 0x%02x)", |
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state->cfg->invert_spectrum, state->cfg->if_freq); |
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/* set IF polarity */ |
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ctrl = state->cfg->invert_spectrum; |
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ctrl |= state->cfg->if_freq; |
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ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_SEL_REG, ctrl); |
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if (mxl_fail(ret)) |
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goto fail; |
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#if 0 |
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if_freq /= 1000000; |
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/* do round */ |
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if_freq += 0.5; |
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if (MXL_IF_LO == state->cfg->if_freq) { |
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ctrl = 0x08; |
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iffcw = (u16)(if_freq / (108 * 4096)); |
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} else if (MXL_IF_HI == state->cfg->if_freq) { |
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ctrl = 0x08; |
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iffcw = (u16)(if_freq / (216 * 4096)); |
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} else { |
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ctrl = 0; |
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iffcw = 0; |
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} |
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ctrl |= (iffcw >> 8); |
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#endif |
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ret = mxl111sf_tuner_read_reg(state, V6_TUNER_IF_FCW_BYP_REG, &ctrl); |
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if (mxl_fail(ret)) |
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goto fail; |
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ctrl &= 0xf0; |
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ctrl |= 0x90; |
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ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_FCW_BYP_REG, ctrl); |
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if (mxl_fail(ret)) |
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goto fail; |
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#if 0 |
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ctrl = iffcw & 0x00ff; |
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#endif |
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ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_FCW_REG, ctrl); |
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if (mxl_fail(ret)) |
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goto fail; |
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state->if_freq = state->cfg->if_freq; |
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fail: |
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return ret; |
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} |
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static int mxl1x1sf_tune_rf(struct dvb_frontend *fe, u32 freq, u8 bw) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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static struct mxl111sf_reg_ctrl_info *reg_ctrl_array; |
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int ret; |
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u8 mxl_mode; |
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mxl_dbg("(freq = %d, bw = 0x%x)", freq, bw); |
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/* stop tune */ |
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ret = mxl111sf_tuner_write_reg(state, START_TUNE_REG, 0); |
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if (mxl_fail(ret)) |
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goto fail; |
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/* check device mode */ |
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ret = mxl111sf_tuner_read_reg(state, MXL_MODE_REG, &mxl_mode); |
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if (mxl_fail(ret)) |
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goto fail; |
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/* Fill out registers for channel tune */ |
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reg_ctrl_array = mxl111sf_calc_phy_tune_regs(freq, bw); |
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if (!reg_ctrl_array) |
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return -EINVAL; |
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ret = mxl111sf_tuner_program_regs(state, reg_ctrl_array); |
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if (mxl_fail(ret)) |
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goto fail; |
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if ((mxl_mode & MXL_DEV_MODE_MASK) == MXL_TUNER_MODE) { |
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/* IF tuner mode only */ |
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mxl1x1sf_tuner_top_master_ctrl(state, 0); |
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mxl1x1sf_tuner_top_master_ctrl(state, 1); |
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mxl1x1sf_tuner_set_if_output_freq(state); |
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} |
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ret = mxl111sf_tuner_write_reg(state, START_TUNE_REG, 1); |
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if (mxl_fail(ret)) |
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goto fail; |
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if (state->cfg->ant_hunt) |
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state->cfg->ant_hunt(fe); |
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fail: |
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return ret; |
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} |
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static int mxl1x1sf_tuner_get_lock_status(struct mxl111sf_tuner_state *state, |
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int *rf_synth_lock, |
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int *ref_synth_lock) |
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{ |
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int ret; |
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u8 data; |
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*rf_synth_lock = 0; |
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*ref_synth_lock = 0; |
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ret = mxl111sf_tuner_read_reg(state, V6_RF_LOCK_STATUS_REG, &data); |
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if (mxl_fail(ret)) |
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goto fail; |
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*ref_synth_lock = ((data & 0x03) == 0x03) ? 1 : 0; |
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*rf_synth_lock = ((data & 0x0c) == 0x0c) ? 1 : 0; |
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fail: |
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return ret; |
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} |
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#if 0 |
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static int mxl1x1sf_tuner_loop_thru_ctrl(struct mxl111sf_tuner_state *state, |
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int onoff) |
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{ |
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return mxl111sf_tuner_write_reg(state, V6_TUNER_LOOP_THRU_CTRL_REG, |
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onoff ? 1 : 0); |
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} |
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#endif |
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/* ------------------------------------------------------------------------ */ |
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static int mxl111sf_tuner_set_params(struct dvb_frontend *fe) |
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{ |
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struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
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u32 delsys = c->delivery_system; |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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int ret; |
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u8 bw; |
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mxl_dbg("()"); |
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switch (delsys) { |
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case SYS_ATSC: |
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case SYS_ATSCMH: |
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bw = 0; /* ATSC */ |
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break; |
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case SYS_DVBC_ANNEX_B: |
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bw = 1; /* US CABLE */ |
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break; |
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case SYS_DVBT: |
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switch (c->bandwidth_hz) { |
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case 6000000: |
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bw = 6; |
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break; |
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case 7000000: |
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bw = 7; |
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break; |
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case 8000000: |
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bw = 8; |
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break; |
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default: |
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pr_err("%s: bandwidth not set!", __func__); |
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return -EINVAL; |
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} |
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break; |
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default: |
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pr_err("%s: modulation type not supported!", __func__); |
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return -EINVAL; |
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} |
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ret = mxl1x1sf_tune_rf(fe, c->frequency, bw); |
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if (mxl_fail(ret)) |
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goto fail; |
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state->frequency = c->frequency; |
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state->bandwidth = c->bandwidth_hz; |
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fail: |
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return ret; |
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} |
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/* ------------------------------------------------------------------------ */ |
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#if 0 |
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static int mxl111sf_tuner_init(struct dvb_frontend *fe) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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int ret; |
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/* wake from standby handled by usb driver */ |
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return ret; |
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} |
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static int mxl111sf_tuner_sleep(struct dvb_frontend *fe) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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int ret; |
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/* enter standby mode handled by usb driver */ |
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return ret; |
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} |
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#endif |
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/* ------------------------------------------------------------------------ */ |
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static int mxl111sf_tuner_get_status(struct dvb_frontend *fe, u32 *status) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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int rf_locked, ref_locked, ret; |
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*status = 0; |
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ret = mxl1x1sf_tuner_get_lock_status(state, &rf_locked, &ref_locked); |
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if (mxl_fail(ret)) |
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goto fail; |
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mxl_info("%s%s", rf_locked ? "rf locked " : "", |
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ref_locked ? "ref locked" : ""); |
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if ((rf_locked) || (ref_locked)) |
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*status |= TUNER_STATUS_LOCKED; |
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fail: |
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return ret; |
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} |
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static int mxl111sf_get_rf_strength(struct dvb_frontend *fe, u16 *strength) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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u8 val1, val2; |
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int ret; |
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*strength = 0; |
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ret = mxl111sf_tuner_write_reg(state, 0x00, 0x02); |
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if (mxl_fail(ret)) |
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goto fail; |
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ret = mxl111sf_tuner_read_reg(state, V6_DIG_RF_PWR_LSB_REG, &val1); |
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if (mxl_fail(ret)) |
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goto fail; |
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ret = mxl111sf_tuner_read_reg(state, V6_DIG_RF_PWR_MSB_REG, &val2); |
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if (mxl_fail(ret)) |
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goto fail; |
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*strength = val1 | ((val2 & 0x07) << 8); |
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fail: |
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ret = mxl111sf_tuner_write_reg(state, 0x00, 0x00); |
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mxl_fail(ret); |
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return ret; |
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} |
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/* ------------------------------------------------------------------------ */ |
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static int mxl111sf_tuner_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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*frequency = state->frequency; |
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return 0; |
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} |
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static int mxl111sf_tuner_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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*bandwidth = state->bandwidth; |
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return 0; |
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} |
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static int mxl111sf_tuner_get_if_frequency(struct dvb_frontend *fe, |
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u32 *frequency) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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*frequency = 0; |
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switch (state->if_freq) { |
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case MXL_IF_4_0: /* 4.0 MHz */ |
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*frequency = 4000000; |
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break; |
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case MXL_IF_4_5: /* 4.5 MHz */ |
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*frequency = 4500000; |
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break; |
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case MXL_IF_4_57: /* 4.57 MHz */ |
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*frequency = 4570000; |
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break; |
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case MXL_IF_5_0: /* 5.0 MHz */ |
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*frequency = 5000000; |
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break; |
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case MXL_IF_5_38: /* 5.38 MHz */ |
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*frequency = 5380000; |
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break; |
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case MXL_IF_6_0: /* 6.0 MHz */ |
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*frequency = 6000000; |
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break; |
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case MXL_IF_6_28: /* 6.28 MHz */ |
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*frequency = 6280000; |
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break; |
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case MXL_IF_7_2: /* 7.2 MHz */ |
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*frequency = 7200000; |
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break; |
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case MXL_IF_35_25: /* 35.25 MHz */ |
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*frequency = 35250000; |
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break; |
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case MXL_IF_36: /* 36 MHz */ |
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*frequency = 36000000; |
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break; |
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case MXL_IF_36_15: /* 36.15 MHz */ |
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*frequency = 36150000; |
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break; |
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case MXL_IF_44: /* 44 MHz */ |
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*frequency = 44000000; |
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break; |
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} |
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return 0; |
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} |
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static void mxl111sf_tuner_release(struct dvb_frontend *fe) |
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{ |
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struct mxl111sf_tuner_state *state = fe->tuner_priv; |
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mxl_dbg("()"); |
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kfree(state); |
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fe->tuner_priv = NULL; |
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} |
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/* ------------------------------------------------------------------------- */ |
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static const struct dvb_tuner_ops mxl111sf_tuner_tuner_ops = { |
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.info = { |
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.name = "MaxLinear MxL111SF", |
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#if 0 |
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.frequency_min_hz = , |
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.frequency_max_hz = , |
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.frequency_step_hz = , |
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#endif |
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}, |
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#if 0 |
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.init = mxl111sf_tuner_init, |
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.sleep = mxl111sf_tuner_sleep, |
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#endif |
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.set_params = mxl111sf_tuner_set_params, |
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.get_status = mxl111sf_tuner_get_status, |
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.get_rf_strength = mxl111sf_get_rf_strength, |
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.get_frequency = mxl111sf_tuner_get_frequency, |
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.get_bandwidth = mxl111sf_tuner_get_bandwidth, |
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.get_if_frequency = mxl111sf_tuner_get_if_frequency, |
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.release = mxl111sf_tuner_release, |
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}; |
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struct dvb_frontend *mxl111sf_tuner_attach(struct dvb_frontend *fe, |
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struct mxl111sf_state *mxl_state, |
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const struct mxl111sf_tuner_config *cfg) |
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{ |
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struct mxl111sf_tuner_state *state = NULL; |
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mxl_dbg("()"); |
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state = kzalloc(sizeof(struct mxl111sf_tuner_state), GFP_KERNEL); |
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if (state == NULL) |
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return NULL; |
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state->mxl_state = mxl_state; |
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state->cfg = cfg; |
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memcpy(&fe->ops.tuner_ops, &mxl111sf_tuner_tuner_ops, |
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sizeof(struct dvb_tuner_ops)); |
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fe->tuner_priv = state; |
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return fe; |
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} |
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EXPORT_SYMBOL_GPL(mxl111sf_tuner_attach); |
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MODULE_DESCRIPTION("MaxLinear MxL111SF CMOS tuner driver"); |
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MODULE_AUTHOR("Michael Krufky <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION("0.1");
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