648 lines
16 KiB
C
648 lines
16 KiB
C
/*
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* FCI FC2580 silicon tuner driver
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*
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* Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "fc2580_priv.h"
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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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/* 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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* 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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/* 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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/* 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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/* 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 = 174000000,
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.frequency_max = 862000000,
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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_s_power(struct v4l2_subdev *sd, int on)
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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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int ret;
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dev_dbg(&client->dev, "on=%d\n", on);
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if (on)
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ret = fc2580_init(dev);
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else
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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 const struct v4l2_subdev_core_ops fc2580_subdev_core_ops = {
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.s_power = fc2580_s_power,
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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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strlcpy(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;
|
|
}
|
|
|
|
static const struct v4l2_subdev_tuner_ops fc2580_subdev_tuner_ops = {
|
|
.g_tuner = fc2580_g_tuner,
|
|
.s_tuner = fc2580_s_tuner,
|
|
.g_frequency = fc2580_g_frequency,
|
|
.s_frequency = fc2580_s_frequency,
|
|
.enum_freq_bands = fc2580_enum_freq_bands,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops fc2580_subdev_ops = {
|
|
.core = &fc2580_subdev_core_ops,
|
|
.tuner = &fc2580_subdev_tuner_ops,
|
|
};
|
|
|
|
static int fc2580_s_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct fc2580_dev *dev = container_of(ctrl->handler, struct fc2580_dev, hdl);
|
|
struct i2c_client *client = dev->client;
|
|
int ret;
|
|
|
|
dev_dbg(&client->dev, "ctrl: id=%d name=%s cur.val=%d val=%d\n",
|
|
ctrl->id, ctrl->name, ctrl->cur.val, ctrl->val);
|
|
|
|
switch (ctrl->id) {
|
|
case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
|
|
case V4L2_CID_RF_TUNER_BANDWIDTH:
|
|
/*
|
|
* TODO: Auto logic does not work 100% correctly as tuner driver
|
|
* do not have information to calculate maximum suitable
|
|
* bandwidth. Calculating it is responsible of master driver.
|
|
*/
|
|
dev->f_bandwidth = dev->bandwidth->val;
|
|
ret = fc2580_set_params(dev);
|
|
break;
|
|
default:
|
|
dev_dbg(&client->dev, "unknown ctrl");
|
|
ret = -EINVAL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const struct v4l2_ctrl_ops fc2580_ctrl_ops = {
|
|
.s_ctrl = fc2580_s_ctrl,
|
|
};
|
|
#endif
|
|
|
|
static struct v4l2_subdev *fc2580_get_v4l2_subdev(struct i2c_client *client)
|
|
{
|
|
struct fc2580_dev *dev = i2c_get_clientdata(client);
|
|
|
|
if (dev->subdev.ops)
|
|
return &dev->subdev;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
static int fc2580_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct fc2580_dev *dev;
|
|
struct fc2580_platform_data *pdata = client->dev.platform_data;
|
|
struct dvb_frontend *fe = pdata->dvb_frontend;
|
|
int ret;
|
|
unsigned int uitmp;
|
|
static const struct regmap_config regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
};
|
|
|
|
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 <crope@iki.fi>");
|
|
MODULE_LICENSE("GPL");
|