505 lines
12 KiB
C
505 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Mirics MSi001 silicon tuner driver
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*
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* Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
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* Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
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*/
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#include <linux/module.h>
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#include <linux/gcd.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ctrls.h>
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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 = 49000000,
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.rangehigh = 263000000,
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}, {
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.type = V4L2_TUNER_RF,
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.index = 1,
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.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
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.rangelow = 390000000,
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.rangehigh = 960000000,
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},
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};
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struct msi001_dev {
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struct spi_device *spi;
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struct v4l2_subdev sd;
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/* Controls */
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struct v4l2_ctrl_handler hdl;
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struct v4l2_ctrl *bandwidth_auto;
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struct v4l2_ctrl *bandwidth;
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struct v4l2_ctrl *lna_gain;
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struct v4l2_ctrl *mixer_gain;
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struct v4l2_ctrl *if_gain;
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unsigned int f_tuner;
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};
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static inline struct msi001_dev *sd_to_msi001_dev(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct msi001_dev, sd);
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}
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static int msi001_wreg(struct msi001_dev *dev, u32 data)
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{
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/* Register format: 4 bits addr + 20 bits value */
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return spi_write(dev->spi, &data, 3);
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};
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static int msi001_set_gain(struct msi001_dev *dev, int lna_gain, int mixer_gain,
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int if_gain)
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{
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struct spi_device *spi = dev->spi;
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int ret;
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u32 reg;
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dev_dbg(&spi->dev, "lna=%d mixer=%d if=%d\n",
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lna_gain, mixer_gain, if_gain);
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reg = 1 << 0;
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reg |= (59 - if_gain) << 4;
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reg |= 0 << 10;
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reg |= (1 - mixer_gain) << 12;
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reg |= (1 - lna_gain) << 13;
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reg |= 4 << 14;
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reg |= 0 << 17;
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ret = msi001_wreg(dev, reg);
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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(&spi->dev, "failed %d\n", ret);
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return ret;
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};
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static int msi001_set_tuner(struct msi001_dev *dev)
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{
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struct spi_device *spi = dev->spi;
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int ret, i;
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unsigned int uitmp, div_n, k, k_thresh, k_frac, div_lo, f_if1;
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u32 reg;
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u64 f_vco;
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u8 mode, filter_mode;
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static const struct {
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u32 rf;
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u8 mode;
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u8 div_lo;
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} band_lut[] = {
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{ 50000000, 0xe1, 16}, /* AM_MODE2, antenna 2 */
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{108000000, 0x42, 32}, /* VHF_MODE */
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{330000000, 0x44, 16}, /* B3_MODE */
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{960000000, 0x48, 4}, /* B45_MODE */
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{ ~0U, 0x50, 2}, /* BL_MODE */
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};
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static const struct {
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u32 freq;
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u8 filter_mode;
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} if_freq_lut[] = {
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{ 0, 0x03}, /* Zero IF */
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{ 450000, 0x02}, /* 450 kHz IF */
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{1620000, 0x01}, /* 1.62 MHz IF */
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{2048000, 0x00}, /* 2.048 MHz IF */
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};
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static const struct {
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u32 freq;
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u8 val;
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} bandwidth_lut[] = {
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{ 200000, 0x00}, /* 200 kHz */
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{ 300000, 0x01}, /* 300 kHz */
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{ 600000, 0x02}, /* 600 kHz */
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{1536000, 0x03}, /* 1.536 MHz */
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{5000000, 0x04}, /* 5 MHz */
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{6000000, 0x05}, /* 6 MHz */
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{7000000, 0x06}, /* 7 MHz */
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{8000000, 0x07}, /* 8 MHz */
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};
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unsigned int f_rf = dev->f_tuner;
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/*
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* bandwidth (Hz)
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* 200000, 300000, 600000, 1536000, 5000000, 6000000, 7000000, 8000000
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*/
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unsigned int bandwidth;
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/*
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* intermediate frequency (Hz)
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* 0, 450000, 1620000, 2048000
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*/
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unsigned int f_if = 0;
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#define F_REF 24000000
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#define DIV_PRE_N 4
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#define F_VCO_STEP div_lo
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dev_dbg(&spi->dev, "f_rf=%d f_if=%d\n", f_rf, f_if);
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for (i = 0; i < ARRAY_SIZE(band_lut); i++) {
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if (f_rf <= band_lut[i].rf) {
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mode = band_lut[i].mode;
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div_lo = band_lut[i].div_lo;
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break;
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}
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}
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if (i == ARRAY_SIZE(band_lut)) {
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ret = -EINVAL;
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goto err;
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}
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/* AM_MODE is upconverted */
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if ((mode >> 0) & 0x1)
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f_if1 = 5 * F_REF;
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else
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f_if1 = 0;
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for (i = 0; i < ARRAY_SIZE(if_freq_lut); i++) {
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if (f_if == if_freq_lut[i].freq) {
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filter_mode = if_freq_lut[i].filter_mode;
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break;
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}
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}
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if (i == ARRAY_SIZE(if_freq_lut)) {
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ret = -EINVAL;
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goto err;
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}
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/* filters */
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bandwidth = dev->bandwidth->val;
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bandwidth = clamp(bandwidth, 200000U, 8000000U);
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for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) {
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if (bandwidth <= bandwidth_lut[i].freq) {
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bandwidth = bandwidth_lut[i].val;
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break;
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}
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}
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if (i == ARRAY_SIZE(bandwidth_lut)) {
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ret = -EINVAL;
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goto err;
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}
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dev->bandwidth->val = bandwidth_lut[i].freq;
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dev_dbg(&spi->dev, "bandwidth selected=%d\n", bandwidth_lut[i].freq);
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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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* ------> | PD | --> | VCO | ------> | /4 | --> | /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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/* Calculate PLL integer and fractional control word. */
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f_vco = (u64) (f_rf + f_if + f_if1) * div_lo;
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div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k);
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k_thresh = (DIV_PRE_N * F_REF) / F_VCO_STEP;
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k_frac = div_u64((u64) k * k_thresh, (DIV_PRE_N * F_REF));
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/* Find out greatest common divisor and divide to smaller. */
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uitmp = gcd(k_thresh, k_frac);
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k_thresh /= uitmp;
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k_frac /= uitmp;
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/* Force divide to reg max. Resolution will be reduced. */
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uitmp = DIV_ROUND_UP(k_thresh, 4095);
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k_thresh = DIV_ROUND_CLOSEST(k_thresh, uitmp);
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k_frac = DIV_ROUND_CLOSEST(k_frac, uitmp);
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/* Calculate real RF set. */
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uitmp = (unsigned int) F_REF * DIV_PRE_N * div_n;
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uitmp += (unsigned int) F_REF * DIV_PRE_N * k_frac / k_thresh;
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uitmp /= div_lo;
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dev_dbg(&spi->dev,
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"f_rf=%u:%u f_vco=%llu div_n=%u k_thresh=%u k_frac=%u div_lo=%u\n",
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f_rf, uitmp, f_vco, div_n, k_thresh, k_frac, div_lo);
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ret = msi001_wreg(dev, 0x00000e);
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if (ret)
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goto err;
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ret = msi001_wreg(dev, 0x000003);
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if (ret)
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goto err;
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reg = 0 << 0;
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reg |= mode << 4;
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reg |= filter_mode << 12;
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reg |= bandwidth << 14;
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reg |= 0x02 << 17;
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reg |= 0x00 << 20;
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ret = msi001_wreg(dev, reg);
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if (ret)
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goto err;
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reg = 5 << 0;
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reg |= k_thresh << 4;
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reg |= 1 << 19;
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reg |= 1 << 21;
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ret = msi001_wreg(dev, reg);
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if (ret)
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goto err;
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reg = 2 << 0;
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reg |= k_frac << 4;
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reg |= div_n << 16;
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ret = msi001_wreg(dev, reg);
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if (ret)
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goto err;
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ret = msi001_set_gain(dev, dev->lna_gain->cur.val,
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dev->mixer_gain->cur.val, dev->if_gain->cur.val);
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if (ret)
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goto err;
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reg = 6 << 0;
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reg |= 63 << 4;
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reg |= 4095 << 10;
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ret = msi001_wreg(dev, reg);
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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(&spi->dev, "failed %d\n", ret);
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return ret;
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}
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static int msi001_standby(struct v4l2_subdev *sd)
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{
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struct msi001_dev *dev = sd_to_msi001_dev(sd);
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return msi001_wreg(dev, 0x000000);
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}
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static int msi001_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
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{
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struct msi001_dev *dev = sd_to_msi001_dev(sd);
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struct spi_device *spi = dev->spi;
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dev_dbg(&spi->dev, "index=%d\n", v->index);
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strscpy(v->name, "Mirics MSi001", 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 = 49000000;
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v->rangehigh = 960000000;
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return 0;
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}
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static int msi001_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v)
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{
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struct msi001_dev *dev = sd_to_msi001_dev(sd);
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struct spi_device *spi = dev->spi;
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dev_dbg(&spi->dev, "index=%d\n", v->index);
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return 0;
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}
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static int msi001_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
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{
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struct msi001_dev *dev = sd_to_msi001_dev(sd);
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struct spi_device *spi = dev->spi;
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dev_dbg(&spi->dev, "tuner=%d\n", f->tuner);
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f->frequency = dev->f_tuner;
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return 0;
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}
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static int msi001_s_frequency(struct v4l2_subdev *sd,
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const struct v4l2_frequency *f)
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{
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struct msi001_dev *dev = sd_to_msi001_dev(sd);
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struct spi_device *spi = dev->spi;
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unsigned int band;
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dev_dbg(&spi->dev, "tuner=%d type=%d frequency=%u\n",
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f->tuner, f->type, f->frequency);
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if (f->frequency < ((bands[0].rangehigh + bands[1].rangelow) / 2))
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band = 0;
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else
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band = 1;
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dev->f_tuner = clamp_t(unsigned int, f->frequency,
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bands[band].rangelow, bands[band].rangehigh);
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return msi001_set_tuner(dev);
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}
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static int msi001_enum_freq_bands(struct v4l2_subdev *sd,
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struct v4l2_frequency_band *band)
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{
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struct msi001_dev *dev = sd_to_msi001_dev(sd);
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struct spi_device *spi = dev->spi;
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dev_dbg(&spi->dev, "tuner=%d type=%d index=%d\n",
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band->tuner, band->type, band->index);
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if (band->index >= ARRAY_SIZE(bands))
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return -EINVAL;
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band->capability = bands[band->index].capability;
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band->rangelow = bands[band->index].rangelow;
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band->rangehigh = bands[band->index].rangehigh;
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return 0;
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}
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static const struct v4l2_subdev_tuner_ops msi001_tuner_ops = {
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.standby = msi001_standby,
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.g_tuner = msi001_g_tuner,
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.s_tuner = msi001_s_tuner,
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.g_frequency = msi001_g_frequency,
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.s_frequency = msi001_s_frequency,
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.enum_freq_bands = msi001_enum_freq_bands,
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};
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static const struct v4l2_subdev_ops msi001_ops = {
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.tuner = &msi001_tuner_ops,
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};
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static int msi001_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct msi001_dev *dev = container_of(ctrl->handler, struct msi001_dev, hdl);
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struct spi_device *spi = dev->spi;
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int ret;
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dev_dbg(&spi->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
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ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
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ctrl->step);
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switch (ctrl->id) {
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case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
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case V4L2_CID_RF_TUNER_BANDWIDTH:
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ret = msi001_set_tuner(dev);
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break;
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case V4L2_CID_RF_TUNER_LNA_GAIN:
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ret = msi001_set_gain(dev, dev->lna_gain->val,
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dev->mixer_gain->cur.val,
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dev->if_gain->cur.val);
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break;
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case V4L2_CID_RF_TUNER_MIXER_GAIN:
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ret = msi001_set_gain(dev, dev->lna_gain->cur.val,
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dev->mixer_gain->val,
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dev->if_gain->cur.val);
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break;
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case V4L2_CID_RF_TUNER_IF_GAIN:
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ret = msi001_set_gain(dev, dev->lna_gain->cur.val,
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dev->mixer_gain->cur.val,
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dev->if_gain->val);
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break;
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default:
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dev_dbg(&spi->dev, "unknown control %d\n", ctrl->id);
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ret = -EINVAL;
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}
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return ret;
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}
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static const struct v4l2_ctrl_ops msi001_ctrl_ops = {
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.s_ctrl = msi001_s_ctrl,
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};
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static int msi001_probe(struct spi_device *spi)
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{
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struct msi001_dev *dev;
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int ret;
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dev_dbg(&spi->dev, "\n");
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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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dev->spi = spi;
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dev->f_tuner = bands[0].rangelow;
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v4l2_spi_subdev_init(&dev->sd, spi, &msi001_ops);
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/* Register controls */
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v4l2_ctrl_handler_init(&dev->hdl, 5);
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dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops,
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V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
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dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops,
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V4L2_CID_RF_TUNER_BANDWIDTH, 200000, 8000000, 1, 200000);
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v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
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dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops,
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V4L2_CID_RF_TUNER_LNA_GAIN, 0, 1, 1, 1);
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dev->mixer_gain = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops,
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V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
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dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops,
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V4L2_CID_RF_TUNER_IF_GAIN, 0, 59, 1, 0);
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if (dev->hdl.error) {
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ret = dev->hdl.error;
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dev_err(&spi->dev, "Could not initialize controls\n");
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/* control init failed, free handler */
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goto err_ctrl_handler_free;
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}
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dev->sd.ctrl_handler = &dev->hdl;
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return 0;
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err_ctrl_handler_free:
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v4l2_ctrl_handler_free(&dev->hdl);
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kfree(dev);
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err:
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return ret;
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}
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static int msi001_remove(struct spi_device *spi)
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{
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struct v4l2_subdev *sd = spi_get_drvdata(spi);
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struct msi001_dev *dev = sd_to_msi001_dev(sd);
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dev_dbg(&spi->dev, "\n");
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/*
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* Registered by v4l2_spi_new_subdev() from master driver, but we must
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* unregister it from here. Weird.
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*/
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v4l2_device_unregister_subdev(&dev->sd);
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v4l2_ctrl_handler_free(&dev->hdl);
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kfree(dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct spi_device_id msi001_id_table[] = {
|
|
{"msi001", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, msi001_id_table);
|
|
|
|
static struct spi_driver msi001_driver = {
|
|
.driver = {
|
|
.name = "msi001",
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
.probe = msi001_probe,
|
|
.remove = msi001_remove,
|
|
.id_table = msi001_id_table,
|
|
};
|
|
module_spi_driver(msi001_driver);
|
|
|
|
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
|
|
MODULE_DESCRIPTION("Mirics MSi001");
|
|
MODULE_LICENSE("GPL");
|