35fe4c6533
Replace home made register access routines with regmap. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
444 lines
11 KiB
C
444 lines
11 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 dvb_frontend *fe)
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{
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struct fc2580_dev *dev = fe->tuner_priv;
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struct i2c_client *client = dev->client;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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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 u8tmp, synth_config;
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unsigned long timeout;
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dev_dbg(&client->dev,
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"delivery_system=%u frequency=%u bandwidth_hz=%u\n",
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c->delivery_system, c->frequency, c->bandwidth_hz);
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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 (c->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) c->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 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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c->frequency, f_vco, F_REF, div_ref, 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 (c->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 (c->bandwidth_hz <= 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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u8tmp = div_u64((u64) dev->clk * fc2580_if_filter_lut[i].mul,
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1000000000);
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ret = regmap_write(dev->regmap, 0x37, u8tmp);
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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 dvb_frontend *fe)
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{
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struct fc2580_dev *dev = fe->tuner_priv;
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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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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 dvb_frontend *fe)
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{
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struct fc2580_dev *dev = fe->tuner_priv;
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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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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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static int fc2580_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct fc2580_dev *dev = fe->tuner_priv;
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struct i2c_client *client = dev->client;
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dev_dbg(&client->dev, "\n");
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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_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_init,
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.sleep = fc2580_sleep,
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.set_params = fc2580_set_params,
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.get_if_frequency = fc2580_get_if_frequency,
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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);
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if (!dev) {
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ret = -ENOMEM;
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goto err;
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}
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if (pdata->clk)
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dev->clk = pdata->clk;
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else
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dev->clk = 16384000; /* internal clock */
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dev->client = client;
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dev->regmap = devm_regmap_init_i2c(client, ®map_config);
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if (IS_ERR(dev->regmap)) {
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ret = PTR_ERR(dev->regmap);
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goto err_kfree;
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}
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/* check if the tuner is there */
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ret = regmap_read(dev->regmap, 0x01, &uitmp);
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if (ret)
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goto err_kfree;
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dev_dbg(&client->dev, "chip_id=%02x\n", uitmp);
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switch (uitmp) {
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case 0x56:
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case 0x5a:
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break;
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default:
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goto err_kfree;
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}
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fe->tuner_priv = dev;
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memcpy(&fe->ops.tuner_ops, &fc2580_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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i2c_set_clientdata(client, dev);
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dev_info(&client->dev, "FCI FC2580 successfully identified\n");
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return 0;
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err_kfree:
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kfree(dev);
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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_remove(struct i2c_client *client)
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{
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struct fc2580_dev *dev = i2c_get_clientdata(client);
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dev_dbg(&client->dev, "\n");
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kfree(dev);
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return 0;
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}
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static const struct i2c_device_id fc2580_id_table[] = {
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{"fc2580", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, fc2580_id_table);
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static struct i2c_driver fc2580_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "fc2580",
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.suppress_bind_attrs = true,
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},
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.probe = fc2580_probe,
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.remove = fc2580_remove,
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.id_table = fc2580_id_table,
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};
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module_i2c_driver(fc2580_driver);
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MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver");
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MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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MODULE_LICENSE("GPL");
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