mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-08-29 03:24:53 -04:00
2958d579ff
While being less compact, using named initializers allows to more easily see which members of the structs are assigned which value without having to lookup the declaration of the struct. And it's also more robust against changes to the struct definition. The mentioned robustness is relevant for a planned change to struct i2c_device_id that replaces .driver_data by an anonymous union. While touching all these arrays, unify usage of whitespace and commas. This patch doesn't modify the compiled arrays, only their representation in source form benefits. The former was confirmed with x86 and arm64 builds. Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
623 lines
15 KiB
C
623 lines
15 KiB
C
// 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 <crope@iki.fi>
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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_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_DEV)
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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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|
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static int fc2580_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v)
|
|
{
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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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{
|
|
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
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struct i2c_client *client = dev->client;
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|
|
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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;
|
|
}
|
|
|
|
static int fc2580_s_frequency(struct v4l2_subdev *sd,
|
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const struct v4l2_frequency *f)
|
|
{
|
|
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",
|
|
f->tuner, f->type, f->frequency);
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|
|
|
dev->f_frequency = clamp_t(unsigned int, f->frequency,
|
|
bands[0].rangelow, bands[0].rangehigh);
|
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return fc2580_set_params(dev);
|
|
}
|
|
|
|
static int fc2580_enum_freq_bands(struct v4l2_subdev *sd,
|
|
struct v4l2_frequency_band *band)
|
|
{
|
|
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
|
|
struct i2c_client *client = dev->client;
|
|
|
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dev_dbg(&client->dev, "tuner=%d type=%d index=%d\n",
|
|
band->tuner, band->type, band->index);
|
|
|
|
if (band->index >= ARRAY_SIZE(bands))
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|
return -EINVAL;
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|
|
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band->capability = bands[band->index].capability;
|
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band->rangelow = bands[band->index].rangelow;
|
|
band->rangehigh = bands[band->index].rangehigh;
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_subdev_tuner_ops fc2580_subdev_tuner_ops = {
|
|
.standby = fc2580_standby,
|
|
.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 = {
|
|
.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)
|
|
{
|
|
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_obj(*dev);
|
|
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_DEV)
|
|
/* 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 void fc2580_remove(struct i2c_client *client)
|
|
{
|
|
struct fc2580_dev *dev = i2c_get_clientdata(client);
|
|
|
|
dev_dbg(&client->dev, "\n");
|
|
|
|
#if IS_ENABLED(CONFIG_VIDEO_DEV)
|
|
v4l2_ctrl_handler_free(&dev->hdl);
|
|
#endif
|
|
kfree(dev);
|
|
}
|
|
|
|
static const struct i2c_device_id fc2580_id_table[] = {
|
|
{ .name = "fc2580" },
|
|
{ }
|
|
};
|
|
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");
|