diff options
Diffstat (limited to 'drivers/media/dvb-frontends/dib0070.c')
| -rw-r--r-- | drivers/media/dvb-frontends/dib0070.c | 769 |
1 files changed, 769 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/dib0070.c b/drivers/media/dvb-frontends/dib0070.c new file mode 100644 index 0000000000..9a8e7cdd2a --- /dev/null +++ b/drivers/media/dvb-frontends/dib0070.c @@ -0,0 +1,769 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Linux-DVB Driver for DiBcom's DiB0070 base-band RF Tuner. + * + * Copyright (C) 2005-9 DiBcom (http://www.dibcom.fr/) + * + * This code is more or less generated from another driver, please + * excuse some codingstyle oddities. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/mutex.h> + +#include <media/dvb_frontend.h> + +#include "dib0070.h" +#include "dibx000_common.h" + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "turn on debugging (default: 0)"); + +#define dprintk(fmt, arg...) do { \ + if (debug) \ + printk(KERN_DEBUG pr_fmt("%s: " fmt), \ + __func__, ##arg); \ +} while (0) + +#define DIB0070_P1D 0x00 +#define DIB0070_P1F 0x01 +#define DIB0070_P1G 0x03 +#define DIB0070S_P1A 0x02 + +struct dib0070_state { + struct i2c_adapter *i2c; + struct dvb_frontend *fe; + const struct dib0070_config *cfg; + u16 wbd_ff_offset; + u8 revision; + + enum frontend_tune_state tune_state; + u32 current_rf; + + /* for the captrim binary search */ + s8 step; + u16 adc_diff; + + s8 captrim; + s8 fcaptrim; + u16 lo4; + + const struct dib0070_tuning *current_tune_table_index; + const struct dib0070_lna_match *lna_match; + + u8 wbd_gain_current; + u16 wbd_offset_3_3[2]; + + /* for the I2C transfer */ + struct i2c_msg msg[2]; + u8 i2c_write_buffer[3]; + u8 i2c_read_buffer[2]; + struct mutex i2c_buffer_lock; +}; + +static u16 dib0070_read_reg(struct dib0070_state *state, u8 reg) +{ + u16 ret; + + if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) { + dprintk("could not acquire lock\n"); + return 0; + } + + state->i2c_write_buffer[0] = reg; + + memset(state->msg, 0, 2 * sizeof(struct i2c_msg)); + state->msg[0].addr = state->cfg->i2c_address; + state->msg[0].flags = 0; + state->msg[0].buf = state->i2c_write_buffer; + state->msg[0].len = 1; + state->msg[1].addr = state->cfg->i2c_address; + state->msg[1].flags = I2C_M_RD; + state->msg[1].buf = state->i2c_read_buffer; + state->msg[1].len = 2; + + if (i2c_transfer(state->i2c, state->msg, 2) != 2) { + pr_warn("DiB0070 I2C read failed\n"); + ret = 0; + } else + ret = (state->i2c_read_buffer[0] << 8) + | state->i2c_read_buffer[1]; + + mutex_unlock(&state->i2c_buffer_lock); + return ret; +} + +static int dib0070_write_reg(struct dib0070_state *state, u8 reg, u16 val) +{ + int ret; + + if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) { + dprintk("could not acquire lock\n"); + return -EINVAL; + } + state->i2c_write_buffer[0] = reg; + state->i2c_write_buffer[1] = val >> 8; + state->i2c_write_buffer[2] = val & 0xff; + + memset(state->msg, 0, sizeof(struct i2c_msg)); + state->msg[0].addr = state->cfg->i2c_address; + state->msg[0].flags = 0; + state->msg[0].buf = state->i2c_write_buffer; + state->msg[0].len = 3; + + if (i2c_transfer(state->i2c, state->msg, 1) != 1) { + pr_warn("DiB0070 I2C write failed\n"); + ret = -EREMOTEIO; + } else + ret = 0; + + mutex_unlock(&state->i2c_buffer_lock); + return ret; +} + +#define HARD_RESET(state) do { \ + state->cfg->sleep(state->fe, 0); \ + if (state->cfg->reset) { \ + state->cfg->reset(state->fe,1); msleep(10); \ + state->cfg->reset(state->fe,0); msleep(10); \ + } \ +} while (0) + +static int dib0070_set_bandwidth(struct dvb_frontend *fe) + { + struct dib0070_state *state = fe->tuner_priv; + u16 tmp = dib0070_read_reg(state, 0x02) & 0x3fff; + + if (state->fe->dtv_property_cache.bandwidth_hz/1000 > 7000) + tmp |= (0 << 14); + else if (state->fe->dtv_property_cache.bandwidth_hz/1000 > 6000) + tmp |= (1 << 14); + else if (state->fe->dtv_property_cache.bandwidth_hz/1000 > 5000) + tmp |= (2 << 14); + else + tmp |= (3 << 14); + + dib0070_write_reg(state, 0x02, tmp); + + /* sharpen the BB filter in ISDB-T to have higher immunity to adjacent channels */ + if (state->fe->dtv_property_cache.delivery_system == SYS_ISDBT) { + u16 value = dib0070_read_reg(state, 0x17); + + dib0070_write_reg(state, 0x17, value & 0xfffc); + tmp = dib0070_read_reg(state, 0x01) & 0x01ff; + dib0070_write_reg(state, 0x01, tmp | (60 << 9)); + + dib0070_write_reg(state, 0x17, value); + } + return 0; +} + +static int dib0070_captrim(struct dib0070_state *state, enum frontend_tune_state *tune_state) +{ + int8_t step_sign; + u16 adc; + int ret = 0; + + if (*tune_state == CT_TUNER_STEP_0) { + dib0070_write_reg(state, 0x0f, 0xed10); + dib0070_write_reg(state, 0x17, 0x0034); + + dib0070_write_reg(state, 0x18, 0x0032); + state->step = state->captrim = state->fcaptrim = 64; + state->adc_diff = 3000; + ret = 20; + + *tune_state = CT_TUNER_STEP_1; + } else if (*tune_state == CT_TUNER_STEP_1) { + state->step /= 2; + dib0070_write_reg(state, 0x14, state->lo4 | state->captrim); + ret = 15; + + *tune_state = CT_TUNER_STEP_2; + } else if (*tune_state == CT_TUNER_STEP_2) { + + adc = dib0070_read_reg(state, 0x19); + + dprintk("CAPTRIM=%d; ADC = %hd (ADC) & %dmV\n", state->captrim, + adc, (u32)adc * (u32)1800 / (u32)1024); + + if (adc >= 400) { + adc -= 400; + step_sign = -1; + } else { + adc = 400 - adc; + step_sign = 1; + } + + if (adc < state->adc_diff) { + dprintk("CAPTRIM=%d is closer to target (%hd/%hd)\n", + state->captrim, adc, state->adc_diff); + state->adc_diff = adc; + state->fcaptrim = state->captrim; + } + state->captrim += (step_sign * state->step); + + if (state->step >= 1) + *tune_state = CT_TUNER_STEP_1; + else + *tune_state = CT_TUNER_STEP_3; + + } else if (*tune_state == CT_TUNER_STEP_3) { + dib0070_write_reg(state, 0x14, state->lo4 | state->fcaptrim); + dib0070_write_reg(state, 0x18, 0x07ff); + *tune_state = CT_TUNER_STEP_4; + } + + return ret; +} + +static int dib0070_set_ctrl_lo5(struct dvb_frontend *fe, u8 vco_bias_trim, u8 hf_div_trim, u8 cp_current, u8 third_order_filt) +{ + struct dib0070_state *state = fe->tuner_priv; + u16 lo5 = (third_order_filt << 14) | (0 << 13) | (1 << 12) | (3 << 9) | (cp_current << 6) | (hf_div_trim << 3) | (vco_bias_trim << 0); + + dprintk("CTRL_LO5: 0x%x\n", lo5); + return dib0070_write_reg(state, 0x15, lo5); +} + +void dib0070_ctrl_agc_filter(struct dvb_frontend *fe, u8 open) +{ + struct dib0070_state *state = fe->tuner_priv; + + if (open) { + dib0070_write_reg(state, 0x1b, 0xff00); + dib0070_write_reg(state, 0x1a, 0x0000); + } else { + dib0070_write_reg(state, 0x1b, 0x4112); + if (state->cfg->vga_filter != 0) { + dib0070_write_reg(state, 0x1a, state->cfg->vga_filter); + dprintk("vga filter register is set to %x\n", state->cfg->vga_filter); + } else + dib0070_write_reg(state, 0x1a, 0x0009); + } +} + +EXPORT_SYMBOL(dib0070_ctrl_agc_filter); +struct dib0070_tuning { + u32 max_freq; /* for every frequency less than or equal to that field: this information is correct */ + u8 switch_trim; + u8 vco_band; + u8 hfdiv; + u8 vco_multi; + u8 presc; + u8 wbdmux; + u16 tuner_enable; +}; + +struct dib0070_lna_match { + u32 max_freq; /* for every frequency less than or equal to that field: this information is correct */ + u8 lna_band; +}; + +static const struct dib0070_tuning dib0070s_tuning_table[] = { + { 570000, 2, 1, 3, 6, 6, 2, 0x4000 | 0x0800 }, /* UHF */ + { 700000, 2, 0, 2, 4, 2, 2, 0x4000 | 0x0800 }, + { 863999, 2, 1, 2, 4, 2, 2, 0x4000 | 0x0800 }, + { 1500000, 0, 1, 1, 2, 2, 4, 0x2000 | 0x0400 }, /* LBAND */ + { 1600000, 0, 1, 1, 2, 2, 4, 0x2000 | 0x0400 }, + { 2000000, 0, 1, 1, 2, 2, 4, 0x2000 | 0x0400 }, + { 0xffffffff, 0, 0, 8, 1, 2, 1, 0x8000 | 0x1000 }, /* SBAND */ +}; + +static const struct dib0070_tuning dib0070_tuning_table[] = { + { 115000, 1, 0, 7, 24, 2, 1, 0x8000 | 0x1000 }, /* FM below 92MHz cannot be tuned */ + { 179500, 1, 0, 3, 16, 2, 1, 0x8000 | 0x1000 }, /* VHF */ + { 189999, 1, 1, 3, 16, 2, 1, 0x8000 | 0x1000 }, + { 250000, 1, 0, 6, 12, 2, 1, 0x8000 | 0x1000 }, + { 569999, 2, 1, 5, 6, 2, 2, 0x4000 | 0x0800 }, /* UHF */ + { 699999, 2, 0, 1, 4, 2, 2, 0x4000 | 0x0800 }, + { 863999, 2, 1, 1, 4, 2, 2, 0x4000 | 0x0800 }, + { 0xffffffff, 0, 1, 0, 2, 2, 4, 0x2000 | 0x0400 }, /* LBAND or everything higher than UHF */ +}; + +static const struct dib0070_lna_match dib0070_lna_flip_chip[] = { + { 180000, 0 }, /* VHF */ + { 188000, 1 }, + { 196400, 2 }, + { 250000, 3 }, + { 550000, 0 }, /* UHF */ + { 590000, 1 }, + { 666000, 3 }, + { 864000, 5 }, + { 1500000, 0 }, /* LBAND or everything higher than UHF */ + { 1600000, 1 }, + { 2000000, 3 }, + { 0xffffffff, 7 }, +}; + +static const struct dib0070_lna_match dib0070_lna[] = { + { 180000, 0 }, /* VHF */ + { 188000, 1 }, + { 196400, 2 }, + { 250000, 3 }, + { 550000, 2 }, /* UHF */ + { 650000, 3 }, + { 750000, 5 }, + { 850000, 6 }, + { 864000, 7 }, + { 1500000, 0 }, /* LBAND or everything higher than UHF */ + { 1600000, 1 }, + { 2000000, 3 }, + { 0xffffffff, 7 }, +}; + +#define LPF 100 +static int dib0070_tune_digital(struct dvb_frontend *fe) +{ + struct dib0070_state *state = fe->tuner_priv; + + const struct dib0070_tuning *tune; + const struct dib0070_lna_match *lna_match; + + enum frontend_tune_state *tune_state = &state->tune_state; + int ret = 10; /* 1ms is the default delay most of the time */ + + u8 band = (u8)BAND_OF_FREQUENCY(fe->dtv_property_cache.frequency/1000); + u32 freq = fe->dtv_property_cache.frequency/1000 + (band == BAND_VHF ? state->cfg->freq_offset_khz_vhf : state->cfg->freq_offset_khz_uhf); + +#ifdef CONFIG_SYS_ISDBT + if (state->fe->dtv_property_cache.delivery_system == SYS_ISDBT && state->fe->dtv_property_cache.isdbt_sb_mode == 1) + if (((state->fe->dtv_property_cache.isdbt_sb_segment_count % 2) + && (state->fe->dtv_property_cache.isdbt_sb_segment_idx == ((state->fe->dtv_property_cache.isdbt_sb_segment_count / 2) + 1))) + || (((state->fe->dtv_property_cache.isdbt_sb_segment_count % 2) == 0) + && (state->fe->dtv_property_cache.isdbt_sb_segment_idx == (state->fe->dtv_property_cache.isdbt_sb_segment_count / 2))) + || (((state->fe->dtv_property_cache.isdbt_sb_segment_count % 2) == 0) + && (state->fe->dtv_property_cache.isdbt_sb_segment_idx == ((state->fe->dtv_property_cache.isdbt_sb_segment_count / 2) + 1)))) + freq += 850; +#endif + if (state->current_rf != freq) { + + switch (state->revision) { + case DIB0070S_P1A: + tune = dib0070s_tuning_table; + lna_match = dib0070_lna; + break; + default: + tune = dib0070_tuning_table; + if (state->cfg->flip_chip) + lna_match = dib0070_lna_flip_chip; + else + lna_match = dib0070_lna; + break; + } + while (freq > tune->max_freq) /* find the right one */ + tune++; + while (freq > lna_match->max_freq) /* find the right one */ + lna_match++; + + state->current_tune_table_index = tune; + state->lna_match = lna_match; + } + + if (*tune_state == CT_TUNER_START) { + dprintk("Tuning for Band: %d (%d kHz)\n", band, freq); + if (state->current_rf != freq) { + u8 REFDIV; + u32 FBDiv, Rest, FREF, VCOF_kHz; + u8 Den; + + state->current_rf = freq; + state->lo4 = (state->current_tune_table_index->vco_band << 11) | (state->current_tune_table_index->hfdiv << 7); + + + dib0070_write_reg(state, 0x17, 0x30); + + + VCOF_kHz = state->current_tune_table_index->vco_multi * freq * 2; + + switch (band) { + case BAND_VHF: + REFDIV = (u8) ((state->cfg->clock_khz + 9999) / 10000); + break; + case BAND_FM: + REFDIV = (u8) ((state->cfg->clock_khz) / 1000); + break; + default: + REFDIV = (u8) (state->cfg->clock_khz / 10000); + break; + } + FREF = state->cfg->clock_khz / REFDIV; + + + + switch (state->revision) { + case DIB0070S_P1A: + FBDiv = (VCOF_kHz / state->current_tune_table_index->presc / FREF); + Rest = (VCOF_kHz / state->current_tune_table_index->presc) - FBDiv * FREF; + break; + + case DIB0070_P1G: + case DIB0070_P1F: + default: + FBDiv = (freq / (FREF / 2)); + Rest = 2 * freq - FBDiv * FREF; + break; + } + + if (Rest < LPF) + Rest = 0; + else if (Rest < 2 * LPF) + Rest = 2 * LPF; + else if (Rest > (FREF - LPF)) { + Rest = 0; + FBDiv += 1; + } else if (Rest > (FREF - 2 * LPF)) + Rest = FREF - 2 * LPF; + Rest = (Rest * 6528) / (FREF / 10); + + Den = 1; + if (Rest > 0) { + state->lo4 |= (1 << 14) | (1 << 12); + Den = 255; + } + + + dib0070_write_reg(state, 0x11, (u16)FBDiv); + dib0070_write_reg(state, 0x12, (Den << 8) | REFDIV); + dib0070_write_reg(state, 0x13, (u16) Rest); + + if (state->revision == DIB0070S_P1A) { + + if (band == BAND_SBAND) { + dib0070_set_ctrl_lo5(fe, 2, 4, 3, 0); + dib0070_write_reg(state, 0x1d, 0xFFFF); + } else + dib0070_set_ctrl_lo5(fe, 5, 4, 3, 1); + } + + dib0070_write_reg(state, 0x20, + 0x0040 | 0x0020 | 0x0010 | 0x0008 | 0x0002 | 0x0001 | state->current_tune_table_index->tuner_enable); + + dprintk("REFDIV: %u, FREF: %d\n", REFDIV, FREF); + dprintk("FBDIV: %d, Rest: %d\n", FBDiv, Rest); + dprintk("Num: %u, Den: %u, SD: %d\n", (u16)Rest, Den, + (state->lo4 >> 12) & 0x1); + dprintk("HFDIV code: %u\n", + state->current_tune_table_index->hfdiv); + dprintk("VCO = %u\n", + state->current_tune_table_index->vco_band); + dprintk("VCOF: ((%u*%d) << 1))\n", + state->current_tune_table_index->vco_multi, + freq); + + *tune_state = CT_TUNER_STEP_0; + } else { /* we are already tuned to this frequency - the configuration is correct */ + ret = 50; /* wakeup time */ + *tune_state = CT_TUNER_STEP_5; + } + } else if ((*tune_state > CT_TUNER_START) && (*tune_state < CT_TUNER_STEP_4)) { + + ret = dib0070_captrim(state, tune_state); + + } else if (*tune_state == CT_TUNER_STEP_4) { + const struct dib0070_wbd_gain_cfg *tmp = state->cfg->wbd_gain; + if (tmp != NULL) { + while (freq/1000 > tmp->freq) /* find the right one */ + tmp++; + dib0070_write_reg(state, 0x0f, + (0 << 15) | (1 << 14) | (3 << 12) + | (tmp->wbd_gain_val << 9) | (0 << 8) | (1 << 7) + | (state->current_tune_table_index->wbdmux << 0)); + state->wbd_gain_current = tmp->wbd_gain_val; + } else { + dib0070_write_reg(state, 0x0f, + (0 << 15) | (1 << 14) | (3 << 12) + | (6 << 9) | (0 << 8) | (1 << 7) + | (state->current_tune_table_index->wbdmux << 0)); + state->wbd_gain_current = 6; + } + + dib0070_write_reg(state, 0x06, 0x3fff); + dib0070_write_reg(state, 0x07, + (state->current_tune_table_index->switch_trim << 11) | (7 << 8) | (state->lna_match->lna_band << 3) | (3 << 0)); + dib0070_write_reg(state, 0x08, (state->lna_match->lna_band << 10) | (3 << 7) | (127)); + dib0070_write_reg(state, 0x0d, 0x0d80); + + + dib0070_write_reg(state, 0x18, 0x07ff); + dib0070_write_reg(state, 0x17, 0x0033); + + + *tune_state = CT_TUNER_STEP_5; + } else if (*tune_state == CT_TUNER_STEP_5) { + dib0070_set_bandwidth(fe); + *tune_state = CT_TUNER_STOP; + } else { + ret = FE_CALLBACK_TIME_NEVER; /* tuner finished, time to call again infinite */ + } + return ret; +} + + +static int dib0070_tune(struct dvb_frontend *fe) +{ + struct dib0070_state *state = fe->tuner_priv; + uint32_t ret; + + state->tune_state = CT_TUNER_START; + + do { + ret = dib0070_tune_digital(fe); + if (ret != FE_CALLBACK_TIME_NEVER) + msleep(ret/10); + else + break; + } while (state->tune_state != CT_TUNER_STOP); + + return 0; +} + +static int dib0070_wakeup(struct dvb_frontend *fe) +{ + struct dib0070_state *state = fe->tuner_priv; + if (state->cfg->sleep) + state->cfg->sleep(fe, 0); + return 0; +} + +static int dib0070_sleep(struct dvb_frontend *fe) +{ + struct dib0070_state *state = fe->tuner_priv; + if (state->cfg->sleep) + state->cfg->sleep(fe, 1); + return 0; +} + +u8 dib0070_get_rf_output(struct dvb_frontend *fe) +{ + struct dib0070_state *state = fe->tuner_priv; + return (dib0070_read_reg(state, 0x07) >> 11) & 0x3; +} +EXPORT_SYMBOL(dib0070_get_rf_output); + +int dib0070_set_rf_output(struct dvb_frontend *fe, u8 no) +{ + struct dib0070_state *state = fe->tuner_priv; + u16 rxrf2 = dib0070_read_reg(state, 0x07) & 0xfe7ff; + if (no > 3) + no = 3; + if (no < 1) + no = 1; + return dib0070_write_reg(state, 0x07, rxrf2 | (no << 11)); +} +EXPORT_SYMBOL(dib0070_set_rf_output); + +static const u16 dib0070_p1f_defaults[] = + +{ + 7, 0x02, + 0x0008, + 0x0000, + 0x0000, + 0x0000, + 0x0000, + 0x0002, + 0x0100, + + 3, 0x0d, + 0x0d80, + 0x0001, + 0x0000, + + 4, 0x11, + 0x0000, + 0x0103, + 0x0000, + 0x0000, + + 3, 0x16, + 0x0004 | 0x0040, + 0x0030, + 0x07ff, + + 6, 0x1b, + 0x4112, + 0xff00, + 0xc07f, + 0x0000, + 0x0180, + 0x4000 | 0x0800 | 0x0040 | 0x0020 | 0x0010 | 0x0008 | 0x0002 | 0x0001, + + 0, +}; + +static u16 dib0070_read_wbd_offset(struct dib0070_state *state, u8 gain) +{ + u16 tuner_en = dib0070_read_reg(state, 0x20); + u16 offset; + + dib0070_write_reg(state, 0x18, 0x07ff); + dib0070_write_reg(state, 0x20, 0x0800 | 0x4000 | 0x0040 | 0x0020 | 0x0010 | 0x0008 | 0x0002 | 0x0001); + dib0070_write_reg(state, 0x0f, (1 << 14) | (2 << 12) | (gain << 9) | (1 << 8) | (1 << 7) | (0 << 0)); + msleep(9); + offset = dib0070_read_reg(state, 0x19); + dib0070_write_reg(state, 0x20, tuner_en); + return offset; +} + +static void dib0070_wbd_offset_calibration(struct dib0070_state *state) +{ + u8 gain; + for (gain = 6; gain < 8; gain++) { + state->wbd_offset_3_3[gain - 6] = ((dib0070_read_wbd_offset(state, gain) * 8 * 18 / 33 + 1) / 2); + dprintk("Gain: %d, WBDOffset (3.3V) = %hd\n", gain, state->wbd_offset_3_3[gain-6]); + } +} + +u16 dib0070_wbd_offset(struct dvb_frontend *fe) +{ + struct dib0070_state *state = fe->tuner_priv; + const struct dib0070_wbd_gain_cfg *tmp = state->cfg->wbd_gain; + u32 freq = fe->dtv_property_cache.frequency/1000; + + if (tmp != NULL) { + while (freq/1000 > tmp->freq) /* find the right one */ + tmp++; + state->wbd_gain_current = tmp->wbd_gain_val; + } else + state->wbd_gain_current = 6; + + return state->wbd_offset_3_3[state->wbd_gain_current - 6]; +} +EXPORT_SYMBOL(dib0070_wbd_offset); + +#define pgm_read_word(w) (*w) +static int dib0070_reset(struct dvb_frontend *fe) +{ + struct dib0070_state *state = fe->tuner_priv; + u16 l, r, *n; + + HARD_RESET(state); + + +#ifndef FORCE_SBAND_TUNER + if ((dib0070_read_reg(state, 0x22) >> 9) & 0x1) + state->revision = (dib0070_read_reg(state, 0x1f) >> 8) & 0xff; + else +#else +#warning forcing SBAND +#endif + state->revision = DIB0070S_P1A; + + /* P1F or not */ + dprintk("Revision: %x\n", state->revision); + + if (state->revision == DIB0070_P1D) { + dprintk("Error: this driver is not to be used meant for P1D or earlier\n"); + return -EINVAL; + } + + n = (u16 *) dib0070_p1f_defaults; + l = pgm_read_word(n++); + while (l) { + r = pgm_read_word(n++); + do { + dib0070_write_reg(state, (u8)r, pgm_read_word(n++)); + r++; + } while (--l); + l = pgm_read_word(n++); + } + + if (state->cfg->force_crystal_mode != 0) + r = state->cfg->force_crystal_mode; + else if (state->cfg->clock_khz >= 24000) + r = 1; + else + r = 2; + + + r |= state->cfg->osc_buffer_state << 3; + + dib0070_write_reg(state, 0x10, r); + dib0070_write_reg(state, 0x1f, (1 << 8) | ((state->cfg->clock_pad_drive & 0xf) << 5)); + + if (state->cfg->invert_iq) { + r = dib0070_read_reg(state, 0x02) & 0xffdf; + dib0070_write_reg(state, 0x02, r | (1 << 5)); + } + + if (state->revision == DIB0070S_P1A) + dib0070_set_ctrl_lo5(fe, 2, 4, 3, 0); + else + dib0070_set_ctrl_lo5(fe, 5, 4, state->cfg->charge_pump, + state->cfg->enable_third_order_filter); + + dib0070_write_reg(state, 0x01, (54 << 9) | 0xc8); + + dib0070_wbd_offset_calibration(state); + + return 0; +} + +static int dib0070_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct dib0070_state *state = fe->tuner_priv; + + *frequency = 1000 * state->current_rf; + return 0; +} + +static void dib0070_release(struct dvb_frontend *fe) +{ + kfree(fe->tuner_priv); + fe->tuner_priv = NULL; +} + +static const struct dvb_tuner_ops dib0070_ops = { + .info = { + .name = "DiBcom DiB0070", + .frequency_min_hz = 45 * MHz, + .frequency_max_hz = 860 * MHz, + .frequency_step_hz = 1 * kHz, + }, + .release = dib0070_release, + + .init = dib0070_wakeup, + .sleep = dib0070_sleep, + .set_params = dib0070_tune, + + .get_frequency = dib0070_get_frequency, +// .get_bandwidth = dib0070_get_bandwidth +}; + +struct dvb_frontend *dib0070_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct dib0070_config *cfg) +{ + struct dib0070_state *state = kzalloc(sizeof(struct dib0070_state), GFP_KERNEL); + if (state == NULL) + return NULL; + + state->cfg = cfg; + state->i2c = i2c; + state->fe = fe; + mutex_init(&state->i2c_buffer_lock); + fe->tuner_priv = state; + + if (dib0070_reset(fe) != 0) + goto free_mem; + + pr_info("DiB0070: successfully identified\n"); + memcpy(&fe->ops.tuner_ops, &dib0070_ops, sizeof(struct dvb_tuner_ops)); + + fe->tuner_priv = state; + return fe; + +free_mem: + kfree(state); + fe->tuner_priv = NULL; + return NULL; +} +EXPORT_SYMBOL_GPL(dib0070_attach); + +MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>"); +MODULE_DESCRIPTION("Driver for the DiBcom 0070 base-band RF Tuner"); +MODULE_LICENSE("GPL"); |