diff options
Diffstat (limited to 'drivers/media/tuners/msi001.c')
| -rw-r--r-- | drivers/media/tuners/msi001.c | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/drivers/media/tuners/msi001.c b/drivers/media/tuners/msi001.c new file mode 100644 index 0000000000..ad6c72c1ed --- /dev/null +++ b/drivers/media/tuners/msi001.c @@ -0,0 +1,510 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Mirics MSi001 silicon tuner driver + * + * Copyright (C) 2013 Antti Palosaari <crope@iki.fi> + * Copyright (C) 2014 Antti Palosaari <crope@iki.fi> + */ + +#include <linux/module.h> +#include <linux/gcd.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ctrls.h> + +static const struct v4l2_frequency_band bands[] = { + { + .type = V4L2_TUNER_RF, + .index = 0, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 49000000, + .rangehigh = 263000000, + }, { + .type = V4L2_TUNER_RF, + .index = 1, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 390000000, + .rangehigh = 960000000, + }, +}; + +struct msi001_dev { + struct spi_device *spi; + struct v4l2_subdev sd; + + /* Controls */ + struct v4l2_ctrl_handler hdl; + struct v4l2_ctrl *bandwidth_auto; + struct v4l2_ctrl *bandwidth; + struct v4l2_ctrl *lna_gain; + struct v4l2_ctrl *mixer_gain; + struct v4l2_ctrl *if_gain; + + unsigned int f_tuner; +}; + +static inline struct msi001_dev *sd_to_msi001_dev(struct v4l2_subdev *sd) +{ + return container_of(sd, struct msi001_dev, sd); +} + +static int msi001_wreg(struct msi001_dev *dev, u32 data) +{ + /* Register format: 4 bits addr + 20 bits value */ + return spi_write(dev->spi, &data, 3); +}; + +static int msi001_set_gain(struct msi001_dev *dev, int lna_gain, int mixer_gain, + int if_gain) +{ + struct spi_device *spi = dev->spi; + int ret; + u32 reg; + + dev_dbg(&spi->dev, "lna=%d mixer=%d if=%d\n", + lna_gain, mixer_gain, if_gain); + + reg = 1 << 0; + reg |= (59 - if_gain) << 4; + reg |= 0 << 10; + reg |= (1 - mixer_gain) << 12; + reg |= (1 - lna_gain) << 13; + reg |= 4 << 14; + reg |= 0 << 17; + ret = msi001_wreg(dev, reg); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&spi->dev, "failed %d\n", ret); + return ret; +}; + +static int msi001_set_tuner(struct msi001_dev *dev) +{ + struct spi_device *spi = dev->spi; + int ret, i; + unsigned int uitmp, div_n, k, k_thresh, k_frac, div_lo, f_if1; + u32 reg; + u64 f_vco; + u8 mode, filter_mode; + + static const struct { + u32 rf; + u8 mode; + u8 div_lo; + } band_lut[] = { + { 50000000, 0xe1, 16}, /* AM_MODE2, antenna 2 */ + {108000000, 0x42, 32}, /* VHF_MODE */ + {330000000, 0x44, 16}, /* B3_MODE */ + {960000000, 0x48, 4}, /* B45_MODE */ + { ~0U, 0x50, 2}, /* BL_MODE */ + }; + static const struct { + u32 freq; + u8 filter_mode; + } if_freq_lut[] = { + { 0, 0x03}, /* Zero IF */ + { 450000, 0x02}, /* 450 kHz IF */ + {1620000, 0x01}, /* 1.62 MHz IF */ + {2048000, 0x00}, /* 2.048 MHz IF */ + }; + static const struct { + u32 freq; + u8 val; + } bandwidth_lut[] = { + { 200000, 0x00}, /* 200 kHz */ + { 300000, 0x01}, /* 300 kHz */ + { 600000, 0x02}, /* 600 kHz */ + {1536000, 0x03}, /* 1.536 MHz */ + {5000000, 0x04}, /* 5 MHz */ + {6000000, 0x05}, /* 6 MHz */ + {7000000, 0x06}, /* 7 MHz */ + {8000000, 0x07}, /* 8 MHz */ + }; + + unsigned int f_rf = dev->f_tuner; + + /* + * bandwidth (Hz) + * 200000, 300000, 600000, 1536000, 5000000, 6000000, 7000000, 8000000 + */ + unsigned int bandwidth; + + /* + * intermediate frequency (Hz) + * 0, 450000, 1620000, 2048000 + */ + unsigned int f_if = 0; + #define F_REF 24000000 + #define DIV_PRE_N 4 + #define F_VCO_STEP div_lo + + dev_dbg(&spi->dev, "f_rf=%d f_if=%d\n", f_rf, f_if); + + for (i = 0; i < ARRAY_SIZE(band_lut); i++) { + if (f_rf <= band_lut[i].rf) { + mode = band_lut[i].mode; + div_lo = band_lut[i].div_lo; + break; + } + } + if (i == ARRAY_SIZE(band_lut)) { + ret = -EINVAL; + goto err; + } + + /* AM_MODE is upconverted */ + if ((mode >> 0) & 0x1) + f_if1 = 5 * F_REF; + else + f_if1 = 0; + + for (i = 0; i < ARRAY_SIZE(if_freq_lut); i++) { + if (f_if == if_freq_lut[i].freq) { + filter_mode = if_freq_lut[i].filter_mode; + break; + } + } + if (i == ARRAY_SIZE(if_freq_lut)) { + ret = -EINVAL; + goto err; + } + + /* filters */ + bandwidth = dev->bandwidth->val; + bandwidth = clamp(bandwidth, 200000U, 8000000U); + + for (i = 0; i < ARRAY_SIZE(bandwidth_lut); i++) { + if (bandwidth <= bandwidth_lut[i].freq) { + bandwidth = bandwidth_lut[i].val; + break; + } + } + if (i == ARRAY_SIZE(bandwidth_lut)) { + ret = -EINVAL; + goto err; + } + + dev->bandwidth->val = bandwidth_lut[i].freq; + + dev_dbg(&spi->dev, "bandwidth selected=%d\n", bandwidth_lut[i].freq); + + /* + * Fractional-N synthesizer + * + * +---------------------------------------+ + * v | + * Fref +----+ +-------+ +----+ +------+ +---+ + * ------> | PD | --> | VCO | ------> | /4 | --> | /N.F | <-- | K | + * +----+ +-------+ +----+ +------+ +---+ + * | + * | + * v + * +-------+ Fout + * | /Rout | ------> + * +-------+ + */ + + /* Calculate PLL integer and fractional control word. */ + f_vco = (u64) (f_rf + f_if + f_if1) * div_lo; + div_n = div_u64_rem(f_vco, DIV_PRE_N * F_REF, &k); + k_thresh = (DIV_PRE_N * F_REF) / F_VCO_STEP; + k_frac = div_u64((u64) k * k_thresh, (DIV_PRE_N * F_REF)); + + /* Find out greatest common divisor and divide to smaller. */ + uitmp = gcd(k_thresh, k_frac); + k_thresh /= uitmp; + k_frac /= uitmp; + + /* Force divide to reg max. Resolution will be reduced. */ + uitmp = DIV_ROUND_UP(k_thresh, 4095); + k_thresh = DIV_ROUND_CLOSEST(k_thresh, uitmp); + k_frac = DIV_ROUND_CLOSEST(k_frac, uitmp); + + /* Calculate real RF set. */ + uitmp = (unsigned int) F_REF * DIV_PRE_N * div_n; + uitmp += (unsigned int) F_REF * DIV_PRE_N * k_frac / k_thresh; + uitmp /= div_lo; + + dev_dbg(&spi->dev, + "f_rf=%u:%u f_vco=%llu div_n=%u k_thresh=%u k_frac=%u div_lo=%u\n", + f_rf, uitmp, f_vco, div_n, k_thresh, k_frac, div_lo); + + ret = msi001_wreg(dev, 0x00000e); + if (ret) + goto err; + + ret = msi001_wreg(dev, 0x000003); + if (ret) + goto err; + + reg = 0 << 0; + reg |= mode << 4; + reg |= filter_mode << 12; + reg |= bandwidth << 14; + reg |= 0x02 << 17; + reg |= 0x00 << 20; + ret = msi001_wreg(dev, reg); + if (ret) + goto err; + + reg = 5 << 0; + reg |= k_thresh << 4; + reg |= 1 << 19; + reg |= 1 << 21; + ret = msi001_wreg(dev, reg); + if (ret) + goto err; + + reg = 2 << 0; + reg |= k_frac << 4; + reg |= div_n << 16; + ret = msi001_wreg(dev, reg); + if (ret) + goto err; + + ret = msi001_set_gain(dev, dev->lna_gain->cur.val, + dev->mixer_gain->cur.val, dev->if_gain->cur.val); + if (ret) + goto err; + + reg = 6 << 0; + reg |= 63 << 4; + reg |= 4095 << 10; + ret = msi001_wreg(dev, reg); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&spi->dev, "failed %d\n", ret); + return ret; +} + +static int msi001_standby(struct v4l2_subdev *sd) +{ + struct msi001_dev *dev = sd_to_msi001_dev(sd); + + return msi001_wreg(dev, 0x000000); +} + +static int msi001_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v) +{ + struct msi001_dev *dev = sd_to_msi001_dev(sd); + struct spi_device *spi = dev->spi; + + dev_dbg(&spi->dev, "index=%d\n", v->index); + + strscpy(v->name, "Mirics MSi001", sizeof(v->name)); + v->type = V4L2_TUNER_RF; + v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; + v->rangelow = 49000000; + v->rangehigh = 960000000; + + return 0; +} + +static int msi001_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v) +{ + struct msi001_dev *dev = sd_to_msi001_dev(sd); + struct spi_device *spi = dev->spi; + + dev_dbg(&spi->dev, "index=%d\n", v->index); + return 0; +} + +static int msi001_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) +{ + struct msi001_dev *dev = sd_to_msi001_dev(sd); + struct spi_device *spi = dev->spi; + + dev_dbg(&spi->dev, "tuner=%d\n", f->tuner); + f->frequency = dev->f_tuner; + return 0; +} + +static int msi001_s_frequency(struct v4l2_subdev *sd, + const struct v4l2_frequency *f) +{ + struct msi001_dev *dev = sd_to_msi001_dev(sd); + struct spi_device *spi = dev->spi; + unsigned int band; + + dev_dbg(&spi->dev, "tuner=%d type=%d frequency=%u\n", + f->tuner, f->type, f->frequency); + + if (f->frequency < ((bands[0].rangehigh + bands[1].rangelow) / 2)) + band = 0; + else + band = 1; + dev->f_tuner = clamp_t(unsigned int, f->frequency, + bands[band].rangelow, bands[band].rangehigh); + + return msi001_set_tuner(dev); +} + +static int msi001_enum_freq_bands(struct v4l2_subdev *sd, + struct v4l2_frequency_band *band) +{ + struct msi001_dev *dev = sd_to_msi001_dev(sd); + struct spi_device *spi = dev->spi; + + dev_dbg(&spi->dev, "tuner=%d type=%d index=%d\n", + band->tuner, band->type, band->index); + + if (band->index >= ARRAY_SIZE(bands)) + return -EINVAL; + + band->capability = bands[band->index].capability; + band->rangelow = bands[band->index].rangelow; + band->rangehigh = bands[band->index].rangehigh; + + return 0; +} + +static const struct v4l2_subdev_tuner_ops msi001_tuner_ops = { + .standby = msi001_standby, + .g_tuner = msi001_g_tuner, + .s_tuner = msi001_s_tuner, + .g_frequency = msi001_g_frequency, + .s_frequency = msi001_s_frequency, + .enum_freq_bands = msi001_enum_freq_bands, +}; + +static const struct v4l2_subdev_ops msi001_ops = { + .tuner = &msi001_tuner_ops, +}; + +static int msi001_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct msi001_dev *dev = container_of(ctrl->handler, struct msi001_dev, hdl); + struct spi_device *spi = dev->spi; + + int ret; + + dev_dbg(&spi->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n", + ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum, + ctrl->step); + + switch (ctrl->id) { + case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: + case V4L2_CID_RF_TUNER_BANDWIDTH: + ret = msi001_set_tuner(dev); + break; + case V4L2_CID_RF_TUNER_LNA_GAIN: + ret = msi001_set_gain(dev, dev->lna_gain->val, + dev->mixer_gain->cur.val, + dev->if_gain->cur.val); + break; + case V4L2_CID_RF_TUNER_MIXER_GAIN: + ret = msi001_set_gain(dev, dev->lna_gain->cur.val, + dev->mixer_gain->val, + dev->if_gain->cur.val); + break; + case V4L2_CID_RF_TUNER_IF_GAIN: + ret = msi001_set_gain(dev, dev->lna_gain->cur.val, + dev->mixer_gain->cur.val, + dev->if_gain->val); + break; + default: + dev_dbg(&spi->dev, "unknown control %d\n", ctrl->id); + ret = -EINVAL; + } + + return ret; +} + +static const struct v4l2_ctrl_ops msi001_ctrl_ops = { + .s_ctrl = msi001_s_ctrl, +}; + +static int msi001_probe(struct spi_device *spi) +{ + struct msi001_dev *dev; + int ret; + + dev_dbg(&spi->dev, "\n"); + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) { + ret = -ENOMEM; + goto err; + } + + dev->spi = spi; + dev->f_tuner = bands[0].rangelow; + v4l2_spi_subdev_init(&dev->sd, spi, &msi001_ops); + + /* Register controls */ + v4l2_ctrl_handler_init(&dev->hdl, 5); + dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops, + V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1); + dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops, + V4L2_CID_RF_TUNER_BANDWIDTH, 200000, 8000000, 1, 200000); + if (dev->hdl.error) { + ret = dev->hdl.error; + dev_err(&spi->dev, "Could not initialize controls\n"); + /* control init failed, free handler */ + goto err_ctrl_handler_free; + } + + v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false); + dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops, + V4L2_CID_RF_TUNER_LNA_GAIN, 0, 1, 1, 1); + dev->mixer_gain = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops, + V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1); + dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &msi001_ctrl_ops, + V4L2_CID_RF_TUNER_IF_GAIN, 0, 59, 1, 0); + if (dev->hdl.error) { + ret = dev->hdl.error; + dev_err(&spi->dev, "Could not initialize controls\n"); + /* control init failed, free handler */ + goto err_ctrl_handler_free; + } + + dev->sd.ctrl_handler = &dev->hdl; + return 0; +err_ctrl_handler_free: + v4l2_ctrl_handler_free(&dev->hdl); + kfree(dev); +err: + return ret; +} + +static void msi001_remove(struct spi_device *spi) +{ + struct v4l2_subdev *sd = spi_get_drvdata(spi); + struct msi001_dev *dev = sd_to_msi001_dev(sd); + + dev_dbg(&spi->dev, "\n"); + + /* + * Registered by v4l2_spi_new_subdev() from master driver, but we must + * unregister it from here. Weird. + */ + v4l2_device_unregister_subdev(&dev->sd); + v4l2_ctrl_handler_free(&dev->hdl); + kfree(dev); +} + +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"); |