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624 lines
15 KiB
624 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* FCI FC2580 silicon tuner driver |
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* |
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* Copyright (C) 2012 Antti Palosaari <[email protected]> |
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*/ |
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|
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#include "fc2580_priv.h" |
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|
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/* |
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* TODO: |
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* I2C write and read works only for one single register. Multiple registers |
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* could not be accessed using normal register address auto-increment. |
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* There could be (very likely) register to change that behavior.... |
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*/ |
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|
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/* write single register conditionally only when value differs from 0xff |
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* XXX: This is special routine meant only for writing fc2580_freq_regs_lut[] |
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* values. Do not use for the other purposes. */ |
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static int fc2580_wr_reg_ff(struct fc2580_dev *dev, u8 reg, u8 val) |
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{ |
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if (val == 0xff) |
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return 0; |
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else |
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return regmap_write(dev->regmap, reg, val); |
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} |
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static int fc2580_set_params(struct fc2580_dev *dev) |
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{ |
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struct i2c_client *client = dev->client; |
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int ret, i; |
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unsigned int uitmp, div_ref, div_ref_val, div_n, k, k_cw, div_out; |
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u64 f_vco; |
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u8 synth_config; |
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unsigned long timeout; |
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if (!dev->active) { |
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dev_dbg(&client->dev, "tuner is sleeping\n"); |
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return 0; |
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} |
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|
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/* |
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* Fractional-N synthesizer |
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* |
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* +---------------------------------------+ |
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* v | |
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* Fref +----+ +----+ +-------+ +----+ +------+ +---+ |
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* ------> | /R | --> | PD | --> | VCO | ------> | /2 | --> | /N.F | <-- | K | |
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* +----+ +----+ +-------+ +----+ +------+ +---+ |
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* | |
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* | |
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* v |
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* +-------+ Fout |
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* | /Rout | ------> |
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* +-------+ |
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*/ |
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for (i = 0; i < ARRAY_SIZE(fc2580_pll_lut); i++) { |
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if (dev->f_frequency <= fc2580_pll_lut[i].freq) |
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break; |
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} |
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if (i == ARRAY_SIZE(fc2580_pll_lut)) { |
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ret = -EINVAL; |
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goto err; |
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} |
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#define DIV_PRE_N 2 |
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#define F_REF dev->clk |
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div_out = fc2580_pll_lut[i].div_out; |
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f_vco = (u64) dev->f_frequency * div_out; |
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synth_config = fc2580_pll_lut[i].band; |
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if (f_vco < 2600000000ULL) |
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synth_config |= 0x06; |
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else |
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synth_config |= 0x0e; |
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|
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/* select reference divider R (keep PLL div N in valid range) */ |
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#define DIV_N_MIN 76 |
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if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 1)) { |
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div_ref = 1; |
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div_ref_val = 0x00; |
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} else if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 2)) { |
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div_ref = 2; |
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div_ref_val = 0x10; |
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} else { |
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div_ref = 4; |
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div_ref_val = 0x20; |
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} |
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|
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/* calculate PLL integer and fractional control word */ |
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uitmp = DIV_PRE_N * F_REF / div_ref; |
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div_n = div_u64_rem(f_vco, uitmp, &k); |
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k_cw = div_u64((u64) k * 0x100000, uitmp); |
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dev_dbg(&client->dev, |
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"frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_ref=%u div_n=%u k=%u div_out=%u k_cw=%0x\n", |
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dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_ref, |
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div_n, k, div_out, k_cw); |
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ret = regmap_write(dev->regmap, 0x02, synth_config); |
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if (ret) |
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goto err; |
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ret = regmap_write(dev->regmap, 0x18, div_ref_val << 0 | k_cw >> 16); |
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if (ret) |
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goto err; |
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ret = regmap_write(dev->regmap, 0x1a, (k_cw >> 8) & 0xff); |
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if (ret) |
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goto err; |
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ret = regmap_write(dev->regmap, 0x1b, (k_cw >> 0) & 0xff); |
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if (ret) |
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goto err; |
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ret = regmap_write(dev->regmap, 0x1c, div_n); |
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if (ret) |
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goto err; |
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|
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/* registers */ |
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for (i = 0; i < ARRAY_SIZE(fc2580_freq_regs_lut); i++) { |
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if (dev->f_frequency <= fc2580_freq_regs_lut[i].freq) |
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break; |
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} |
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if (i == ARRAY_SIZE(fc2580_freq_regs_lut)) { |
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ret = -EINVAL; |
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goto err; |
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} |
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ret = fc2580_wr_reg_ff(dev, 0x25, fc2580_freq_regs_lut[i].r25_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x27, fc2580_freq_regs_lut[i].r27_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x28, fc2580_freq_regs_lut[i].r28_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x29, fc2580_freq_regs_lut[i].r29_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x2b, fc2580_freq_regs_lut[i].r2b_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x2c, fc2580_freq_regs_lut[i].r2c_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x2d, fc2580_freq_regs_lut[i].r2d_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x30, fc2580_freq_regs_lut[i].r30_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x44, fc2580_freq_regs_lut[i].r44_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x50, fc2580_freq_regs_lut[i].r50_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x53, fc2580_freq_regs_lut[i].r53_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x5f, fc2580_freq_regs_lut[i].r5f_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x61, fc2580_freq_regs_lut[i].r61_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x62, fc2580_freq_regs_lut[i].r62_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x63, fc2580_freq_regs_lut[i].r63_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x67, fc2580_freq_regs_lut[i].r67_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x68, fc2580_freq_regs_lut[i].r68_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x69, fc2580_freq_regs_lut[i].r69_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x6a, fc2580_freq_regs_lut[i].r6a_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x6b, fc2580_freq_regs_lut[i].r6b_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x6c, fc2580_freq_regs_lut[i].r6c_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x6d, fc2580_freq_regs_lut[i].r6d_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x6e, fc2580_freq_regs_lut[i].r6e_val); |
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if (ret) |
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goto err; |
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ret = fc2580_wr_reg_ff(dev, 0x6f, fc2580_freq_regs_lut[i].r6f_val); |
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if (ret) |
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goto err; |
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/* IF filters */ |
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for (i = 0; i < ARRAY_SIZE(fc2580_if_filter_lut); i++) { |
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if (dev->f_bandwidth <= fc2580_if_filter_lut[i].freq) |
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break; |
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} |
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if (i == ARRAY_SIZE(fc2580_if_filter_lut)) { |
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ret = -EINVAL; |
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goto err; |
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} |
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ret = regmap_write(dev->regmap, 0x36, fc2580_if_filter_lut[i].r36_val); |
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if (ret) |
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goto err; |
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uitmp = (unsigned int) 8058000 - (dev->f_bandwidth * 122 / 100 / 2); |
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uitmp = div64_u64((u64) dev->clk * uitmp, 1000000000000ULL); |
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ret = regmap_write(dev->regmap, 0x37, uitmp); |
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if (ret) |
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goto err; |
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ret = regmap_write(dev->regmap, 0x39, fc2580_if_filter_lut[i].r39_val); |
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if (ret) |
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goto err; |
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timeout = jiffies + msecs_to_jiffies(30); |
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for (uitmp = ~0xc0; !time_after(jiffies, timeout) && uitmp != 0xc0;) { |
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/* trigger filter */ |
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ret = regmap_write(dev->regmap, 0x2e, 0x09); |
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if (ret) |
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goto err; |
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/* locked when [7:6] are set (val: d7 6MHz, d5 7MHz, cd 8MHz) */ |
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ret = regmap_read(dev->regmap, 0x2f, &uitmp); |
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if (ret) |
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goto err; |
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uitmp &= 0xc0; |
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ret = regmap_write(dev->regmap, 0x2e, 0x01); |
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if (ret) |
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goto err; |
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} |
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if (uitmp != 0xc0) |
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dev_dbg(&client->dev, "filter did not lock %02x\n", uitmp); |
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return 0; |
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err: |
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dev_dbg(&client->dev, "failed=%d\n", ret); |
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return ret; |
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} |
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static int fc2580_init(struct fc2580_dev *dev) |
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{ |
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struct i2c_client *client = dev->client; |
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int ret, i; |
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dev_dbg(&client->dev, "\n"); |
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for (i = 0; i < ARRAY_SIZE(fc2580_init_reg_vals); i++) { |
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ret = regmap_write(dev->regmap, fc2580_init_reg_vals[i].reg, |
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fc2580_init_reg_vals[i].val); |
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if (ret) |
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goto err; |
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} |
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dev->active = true; |
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return 0; |
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err: |
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dev_dbg(&client->dev, "failed=%d\n", ret); |
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return ret; |
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} |
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static int fc2580_sleep(struct fc2580_dev *dev) |
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{ |
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struct i2c_client *client = dev->client; |
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int ret; |
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dev_dbg(&client->dev, "\n"); |
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dev->active = false; |
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ret = regmap_write(dev->regmap, 0x02, 0x0a); |
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if (ret) |
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goto err; |
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return 0; |
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err: |
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dev_dbg(&client->dev, "failed=%d\n", ret); |
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return ret; |
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} |
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/* |
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* DVB API |
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*/ |
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static int fc2580_dvb_set_params(struct dvb_frontend *fe) |
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{ |
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struct fc2580_dev *dev = fe->tuner_priv; |
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struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
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dev->f_frequency = c->frequency; |
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dev->f_bandwidth = c->bandwidth_hz; |
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return fc2580_set_params(dev); |
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} |
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static int fc2580_dvb_init(struct dvb_frontend *fe) |
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{ |
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return fc2580_init(fe->tuner_priv); |
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} |
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static int fc2580_dvb_sleep(struct dvb_frontend *fe) |
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{ |
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return fc2580_sleep(fe->tuner_priv); |
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} |
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static int fc2580_dvb_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
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{ |
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*frequency = 0; /* Zero-IF */ |
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return 0; |
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} |
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static const struct dvb_tuner_ops fc2580_dvb_tuner_ops = { |
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.info = { |
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.name = "FCI FC2580", |
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.frequency_min_hz = 174 * MHz, |
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.frequency_max_hz = 862 * MHz, |
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}, |
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.init = fc2580_dvb_init, |
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.sleep = fc2580_dvb_sleep, |
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.set_params = fc2580_dvb_set_params, |
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.get_if_frequency = fc2580_dvb_get_if_frequency, |
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}; |
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/* |
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* V4L2 API |
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*/ |
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#if IS_ENABLED(CONFIG_VIDEO_V4L2) |
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static const struct v4l2_frequency_band bands[] = { |
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{ |
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.type = V4L2_TUNER_RF, |
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.index = 0, |
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.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, |
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.rangelow = 130000000, |
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.rangehigh = 2000000000, |
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}, |
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}; |
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static inline struct fc2580_dev *fc2580_subdev_to_dev(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct fc2580_dev, subdev); |
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} |
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static int fc2580_standby(struct v4l2_subdev *sd) |
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{ |
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struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); |
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int ret; |
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ret = fc2580_sleep(dev); |
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if (ret) |
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return ret; |
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return fc2580_set_params(dev); |
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} |
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static int fc2580_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v) |
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{ |
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struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); |
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struct i2c_client *client = dev->client; |
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dev_dbg(&client->dev, "index=%d\n", v->index); |
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strscpy(v->name, "FCI FC2580", sizeof(v->name)); |
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v->type = V4L2_TUNER_RF; |
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v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; |
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v->rangelow = bands[0].rangelow; |
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v->rangehigh = bands[0].rangehigh; |
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return 0; |
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} |
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static int fc2580_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v) |
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{ |
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struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); |
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struct i2c_client *client = dev->client; |
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dev_dbg(&client->dev, "index=%d\n", v->index); |
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return 0; |
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} |
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static int fc2580_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) |
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{ |
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struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); |
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struct i2c_client *client = dev->client; |
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dev_dbg(&client->dev, "tuner=%d\n", f->tuner); |
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f->frequency = dev->f_frequency; |
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return 0; |
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} |
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static int fc2580_s_frequency(struct v4l2_subdev *sd, |
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const struct v4l2_frequency *f) |
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{ |
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struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); |
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struct i2c_client *client = dev->client; |
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dev_dbg(&client->dev, "tuner=%d type=%d frequency=%u\n", |
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f->tuner, f->type, f->frequency); |
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dev->f_frequency = clamp_t(unsigned int, f->frequency, |
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bands[0].rangelow, bands[0].rangehigh); |
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return fc2580_set_params(dev); |
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} |
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static int fc2580_enum_freq_bands(struct v4l2_subdev *sd, |
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struct v4l2_frequency_band *band) |
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{ |
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struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); |
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struct i2c_client *client = dev->client; |
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dev_dbg(&client->dev, "tuner=%d type=%d index=%d\n", |
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band->tuner, band->type, band->index); |
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if (band->index >= ARRAY_SIZE(bands)) |
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return -EINVAL; |
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band->capability = bands[band->index].capability; |
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band->rangelow = bands[band->index].rangelow; |
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band->rangehigh = bands[band->index].rangehigh; |
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return 0; |
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} |
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static const struct v4l2_subdev_tuner_ops fc2580_subdev_tuner_ops = { |
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.standby = fc2580_standby, |
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.g_tuner = fc2580_g_tuner, |
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.s_tuner = fc2580_s_tuner, |
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.g_frequency = fc2580_g_frequency, |
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.s_frequency = fc2580_s_frequency, |
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.enum_freq_bands = fc2580_enum_freq_bands, |
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}; |
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static const struct v4l2_subdev_ops fc2580_subdev_ops = { |
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.tuner = &fc2580_subdev_tuner_ops, |
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}; |
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|
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static int fc2580_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct fc2580_dev *dev = container_of(ctrl->handler, struct fc2580_dev, hdl); |
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struct i2c_client *client = dev->client; |
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int ret; |
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dev_dbg(&client->dev, "ctrl: id=%d name=%s cur.val=%d val=%d\n", |
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ctrl->id, ctrl->name, ctrl->cur.val, ctrl->val); |
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|
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switch (ctrl->id) { |
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case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: |
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case V4L2_CID_RF_TUNER_BANDWIDTH: |
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/* |
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* TODO: Auto logic does not work 100% correctly as tuner driver |
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* do not have information to calculate maximum suitable |
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* bandwidth. Calculating it is responsible of master driver. |
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*/ |
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dev->f_bandwidth = dev->bandwidth->val; |
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ret = fc2580_set_params(dev); |
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break; |
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default: |
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dev_dbg(&client->dev, "unknown ctrl"); |
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ret = -EINVAL; |
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} |
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return ret; |
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} |
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static const struct v4l2_ctrl_ops fc2580_ctrl_ops = { |
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.s_ctrl = fc2580_s_ctrl, |
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}; |
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#endif |
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static struct v4l2_subdev *fc2580_get_v4l2_subdev(struct i2c_client *client) |
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{ |
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struct fc2580_dev *dev = i2c_get_clientdata(client); |
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|
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if (dev->subdev.ops) |
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return &dev->subdev; |
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else |
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return NULL; |
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} |
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|
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static int fc2580_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct fc2580_dev *dev; |
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struct fc2580_platform_data *pdata = client->dev.platform_data; |
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struct dvb_frontend *fe = pdata->dvb_frontend; |
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int ret; |
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unsigned int uitmp; |
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static const struct regmap_config regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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}; |
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|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
|
if (!dev) { |
|
ret = -ENOMEM; |
|
goto err; |
|
} |
|
|
|
if (pdata->clk) |
|
dev->clk = pdata->clk; |
|
else |
|
dev->clk = 16384000; /* internal clock */ |
|
dev->client = client; |
|
dev->regmap = devm_regmap_init_i2c(client, ®map_config); |
|
if (IS_ERR(dev->regmap)) { |
|
ret = PTR_ERR(dev->regmap); |
|
goto err_kfree; |
|
} |
|
|
|
/* check if the tuner is there */ |
|
ret = regmap_read(dev->regmap, 0x01, &uitmp); |
|
if (ret) |
|
goto err_kfree; |
|
|
|
dev_dbg(&client->dev, "chip_id=%02x\n", uitmp); |
|
|
|
switch (uitmp) { |
|
case 0x56: |
|
case 0x5a: |
|
break; |
|
default: |
|
ret = -ENODEV; |
|
goto err_kfree; |
|
} |
|
|
|
#if IS_ENABLED(CONFIG_VIDEO_V4L2) |
|
/* Register controls */ |
|
v4l2_ctrl_handler_init(&dev->hdl, 2); |
|
dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops, |
|
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, |
|
0, 1, 1, 1); |
|
dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops, |
|
V4L2_CID_RF_TUNER_BANDWIDTH, |
|
3000, 10000000, 1, 3000); |
|
v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false); |
|
if (dev->hdl.error) { |
|
ret = dev->hdl.error; |
|
dev_err(&client->dev, "Could not initialize controls\n"); |
|
v4l2_ctrl_handler_free(&dev->hdl); |
|
goto err_kfree; |
|
} |
|
dev->subdev.ctrl_handler = &dev->hdl; |
|
dev->f_frequency = bands[0].rangelow; |
|
dev->f_bandwidth = dev->bandwidth->val; |
|
v4l2_i2c_subdev_init(&dev->subdev, client, &fc2580_subdev_ops); |
|
#endif |
|
fe->tuner_priv = dev; |
|
memcpy(&fe->ops.tuner_ops, &fc2580_dvb_tuner_ops, |
|
sizeof(fe->ops.tuner_ops)); |
|
pdata->get_v4l2_subdev = fc2580_get_v4l2_subdev; |
|
i2c_set_clientdata(client, dev); |
|
|
|
dev_info(&client->dev, "FCI FC2580 successfully identified\n"); |
|
return 0; |
|
err_kfree: |
|
kfree(dev); |
|
err: |
|
dev_dbg(&client->dev, "failed=%d\n", ret); |
|
return ret; |
|
} |
|
|
|
static int fc2580_remove(struct i2c_client *client) |
|
{ |
|
struct fc2580_dev *dev = i2c_get_clientdata(client); |
|
|
|
dev_dbg(&client->dev, "\n"); |
|
|
|
#if IS_ENABLED(CONFIG_VIDEO_V4L2) |
|
v4l2_ctrl_handler_free(&dev->hdl); |
|
#endif |
|
kfree(dev); |
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id fc2580_id_table[] = { |
|
{"fc2580", 0}, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, fc2580_id_table); |
|
|
|
static struct i2c_driver fc2580_driver = { |
|
.driver = { |
|
.name = "fc2580", |
|
.suppress_bind_attrs = true, |
|
}, |
|
.probe = fc2580_probe, |
|
.remove = fc2580_remove, |
|
.id_table = fc2580_id_table, |
|
}; |
|
|
|
module_i2c_driver(fc2580_driver); |
|
|
|
MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver"); |
|
MODULE_AUTHOR("Antti Palosaari <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|