/* * Mirics MSi001 silicon tuner driver * * Copyright (C) 2013 Antti Palosaari * Copyright (C) 2014 Antti Palosaari * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include 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); strlcpy(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 int 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); 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 "); MODULE_DESCRIPTION("Mirics MSi001"); MODULE_LICENSE("GPL");