556 lines
12 KiB
C
556 lines
12 KiB
C
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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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* 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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/* Max transfer size done by I2C transfer functions */
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#define MAX_XFER_SIZE 64
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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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* Due to that limitation functions:
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* fc2580_wr_regs()
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* fc2580_rd_regs()
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* could not be used for accessing more than one register at once.
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*
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* TODO:
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* Currently it blind writes bunch of static registers from the
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* fc2580_freq_regs_lut[] when fc2580_set_params() is called. Add some
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* logic to reduce unneeded register writes.
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*/
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/* write multiple registers */
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static int fc2580_wr_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len)
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{
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int ret;
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u8 buf[MAX_XFER_SIZE];
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struct i2c_msg msg[1] = {
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{
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.addr = priv->cfg->i2c_addr,
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.flags = 0,
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.len = 1 + len,
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.buf = buf,
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}
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};
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if (1 + len > sizeof(buf)) {
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dev_warn(&priv->i2c->dev,
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"%s: i2c wr reg=%04x: len=%d is too big!\n",
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KBUILD_MODNAME, reg, len);
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return -EINVAL;
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}
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buf[0] = reg;
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memcpy(&buf[1], val, len);
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ret = i2c_transfer(priv->i2c, msg, 1);
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if (ret == 1) {
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ret = 0;
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} else {
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dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
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"len=%d\n", KBUILD_MODNAME, ret, reg, len);
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ret = -EREMOTEIO;
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}
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return ret;
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}
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/* read multiple registers */
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static int fc2580_rd_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len)
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{
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int ret;
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u8 buf[MAX_XFER_SIZE];
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struct i2c_msg msg[2] = {
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{
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.addr = priv->cfg->i2c_addr,
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.flags = 0,
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.len = 1,
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.buf = ®,
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}, {
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.addr = priv->cfg->i2c_addr,
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.flags = I2C_M_RD,
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.len = len,
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.buf = buf,
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}
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};
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if (len > sizeof(buf)) {
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dev_warn(&priv->i2c->dev,
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"%s: i2c rd reg=%04x: len=%d is too big!\n",
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KBUILD_MODNAME, reg, len);
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return -EINVAL;
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}
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ret = i2c_transfer(priv->i2c, msg, 2);
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if (ret == 2) {
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memcpy(val, buf, len);
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ret = 0;
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} else {
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dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
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"len=%d\n", KBUILD_MODNAME, ret, reg, len);
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ret = -EREMOTEIO;
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}
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return ret;
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}
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/* write single register */
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static int fc2580_wr_reg(struct fc2580_priv *priv, u8 reg, u8 val)
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{
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return fc2580_wr_regs(priv, reg, &val, 1);
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}
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/* read single register */
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static int fc2580_rd_reg(struct fc2580_priv *priv, u8 reg, u8 *val)
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{
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return fc2580_rd_regs(priv, reg, val, 1);
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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_priv *priv, 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 fc2580_wr_regs(priv, reg, &val, 1);
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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_priv *priv = fe->tuner_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret = 0, i;
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unsigned int r_val, n_val, k_val, k_val_reg, f_ref;
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u8 tmp_val, r18_val;
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u64 f_vco;
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/*
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* Fractional-N synthesizer/PLL.
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* Most likely all those PLL calculations are not correct. I am not
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* sure, but it looks like it is divider based Fractional-N synthesizer.
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* There is divider for reference clock too?
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* Anyhow, synthesizer calculation results seems to be quite correct.
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*/
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dev_dbg(&priv->i2c->dev, "%s: delivery_system=%d frequency=%d " \
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"bandwidth_hz=%d\n", __func__,
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c->delivery_system, c->frequency, c->bandwidth_hz);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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/* PLL */
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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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goto err;
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f_vco = c->frequency;
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f_vco *= fc2580_pll_lut[i].div;
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if (f_vco >= 2600000000UL)
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tmp_val = 0x0e | fc2580_pll_lut[i].band;
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else
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tmp_val = 0x06 | fc2580_pll_lut[i].band;
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ret = fc2580_wr_reg(priv, 0x02, tmp_val);
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if (ret < 0)
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goto err;
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if (f_vco >= 2UL * 76 * priv->cfg->clock) {
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r_val = 1;
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r18_val = 0x00;
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} else if (f_vco >= 1UL * 76 * priv->cfg->clock) {
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r_val = 2;
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r18_val = 0x10;
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} else {
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r_val = 4;
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r18_val = 0x20;
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}
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f_ref = 2UL * priv->cfg->clock / r_val;
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n_val = div_u64_rem(f_vco, f_ref, &k_val);
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k_val_reg = div_u64(1ULL * k_val * (1 << 20), f_ref);
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ret = fc2580_wr_reg(priv, 0x18, r18_val | ((k_val_reg >> 16) & 0xff));
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg(priv, 0x1a, (k_val_reg >> 8) & 0xff);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg(priv, 0x1b, (k_val_reg >> 0) & 0xff);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg(priv, 0x1c, n_val);
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if (ret < 0)
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goto err;
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if (priv->cfg->clock >= 28000000) {
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ret = fc2580_wr_reg(priv, 0x4b, 0x22);
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if (ret < 0)
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goto err;
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}
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if (fc2580_pll_lut[i].band == 0x00) {
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if (c->frequency <= 794000000)
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tmp_val = 0x9f;
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else
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tmp_val = 0x8f;
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ret = fc2580_wr_reg(priv, 0x2d, tmp_val);
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if (ret < 0)
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goto err;
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}
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/* registers */
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for (i = 0; i < ARRAY_SIZE(fc2580_freq_regs_lut); i++) {
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if (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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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x25, fc2580_freq_regs_lut[i].r25_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x27, fc2580_freq_regs_lut[i].r27_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x28, fc2580_freq_regs_lut[i].r28_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x29, fc2580_freq_regs_lut[i].r29_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x2b, fc2580_freq_regs_lut[i].r2b_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x2c, fc2580_freq_regs_lut[i].r2c_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x2d, fc2580_freq_regs_lut[i].r2d_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x30, fc2580_freq_regs_lut[i].r30_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x44, fc2580_freq_regs_lut[i].r44_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x50, fc2580_freq_regs_lut[i].r50_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x53, fc2580_freq_regs_lut[i].r53_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x5f, fc2580_freq_regs_lut[i].r5f_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x61, fc2580_freq_regs_lut[i].r61_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x62, fc2580_freq_regs_lut[i].r62_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x63, fc2580_freq_regs_lut[i].r63_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x67, fc2580_freq_regs_lut[i].r67_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x68, fc2580_freq_regs_lut[i].r68_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x69, fc2580_freq_regs_lut[i].r69_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x6a, fc2580_freq_regs_lut[i].r6a_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x6b, fc2580_freq_regs_lut[i].r6b_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x6c, fc2580_freq_regs_lut[i].r6c_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x6d, fc2580_freq_regs_lut[i].r6d_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x6e, fc2580_freq_regs_lut[i].r6e_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg_ff(priv, 0x6f, fc2580_freq_regs_lut[i].r6f_val);
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if (ret < 0)
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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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goto err;
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ret = fc2580_wr_reg(priv, 0x36, fc2580_if_filter_lut[i].r36_val);
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if (ret < 0)
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goto err;
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ret = fc2580_wr_reg(priv, 0x37, div_u64(1ULL * priv->cfg->clock *
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||
|
|
fc2580_if_filter_lut[i].mul, 1000000000));
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = fc2580_wr_reg(priv, 0x39, fc2580_if_filter_lut[i].r39_val);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
/* calibration? */
|
||
|
|
ret = fc2580_wr_reg(priv, 0x2e, 0x09);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
for (i = 0; i < 5; i++) {
|
||
|
|
ret = fc2580_rd_reg(priv, 0x2f, &tmp_val);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
/* done when [7:6] are set */
|
||
|
|
if ((tmp_val & 0xc0) == 0xc0)
|
||
|
|
break;
|
||
|
|
|
||
|
|
ret = fc2580_wr_reg(priv, 0x2e, 0x01);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
ret = fc2580_wr_reg(priv, 0x2e, 0x09);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
usleep_range(5000, 25000);
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: loop=%i\n", __func__, i);
|
||
|
|
|
||
|
|
ret = fc2580_wr_reg(priv, 0x2e, 0x01);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fc2580_init(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct fc2580_priv *priv = fe->tuner_priv;
|
||
|
|
int ret, i;
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(fc2580_init_reg_vals); i++) {
|
||
|
|
ret = fc2580_wr_reg(priv, fc2580_init_reg_vals[i].reg,
|
||
|
|
fc2580_init_reg_vals[i].val);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fc2580_sleep(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct fc2580_priv *priv = fe->tuner_priv;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
||
|
|
|
||
|
|
ret = fc2580_wr_reg(priv, 0x02, 0x0a);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fc2580_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
|
||
|
|
{
|
||
|
|
struct fc2580_priv *priv = fe->tuner_priv;
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
|
||
|
|
|
||
|
|
*frequency = 0; /* Zero-IF */
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fc2580_release(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct fc2580_priv *priv = fe->tuner_priv;
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
|
||
|
|
|
||
|
|
kfree(fe->tuner_priv);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dvb_tuner_ops fc2580_tuner_ops = {
|
||
|
|
.info = {
|
||
|
|
.name = "FCI FC2580",
|
||
|
|
.frequency_min = 174000000,
|
||
|
|
.frequency_max = 862000000,
|
||
|
|
},
|
||
|
|
|
||
|
|
.release = fc2580_release,
|
||
|
|
|
||
|
|
.init = fc2580_init,
|
||
|
|
.sleep = fc2580_sleep,
|
||
|
|
.set_params = fc2580_set_params,
|
||
|
|
|
||
|
|
.get_if_frequency = fc2580_get_if_frequency,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct dvb_frontend *fc2580_attach(struct dvb_frontend *fe,
|
||
|
|
struct i2c_adapter *i2c, const struct fc2580_config *cfg)
|
||
|
|
{
|
||
|
|
struct fc2580_priv *priv;
|
||
|
|
int ret;
|
||
|
|
u8 chip_id;
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
||
|
|
|
||
|
|
priv = kzalloc(sizeof(struct fc2580_priv), GFP_KERNEL);
|
||
|
|
if (!priv) {
|
||
|
|
ret = -ENOMEM;
|
||
|
|
dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
priv->cfg = cfg;
|
||
|
|
priv->i2c = i2c;
|
||
|
|
|
||
|
|
/* check if the tuner is there */
|
||
|
|
ret = fc2580_rd_reg(priv, 0x01, &chip_id);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id);
|
||
|
|
|
||
|
|
switch (chip_id) {
|
||
|
|
case 0x56:
|
||
|
|
case 0x5a:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_info(&priv->i2c->dev,
|
||
|
|
"%s: FCI FC2580 successfully identified\n",
|
||
|
|
KBUILD_MODNAME);
|
||
|
|
|
||
|
|
fe->tuner_priv = priv;
|
||
|
|
memcpy(&fe->ops.tuner_ops, &fc2580_tuner_ops,
|
||
|
|
sizeof(struct dvb_tuner_ops));
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
return fe;
|
||
|
|
err:
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
||
|
|
|
||
|
|
dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
kfree(priv);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(fc2580_attach);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver");
|
||
|
|
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
|
||
|
|
MODULE_LICENSE("GPL");
|