diff options
Diffstat (limited to 'drivers/media/tuners/fc2580.c')
| -rw-r--r-- | drivers/media/tuners/fc2580.c | 623 |
1 files changed, 623 insertions, 0 deletions
diff --git a/drivers/media/tuners/fc2580.c b/drivers/media/tuners/fc2580.c new file mode 100644 index 000000000..f30932e1a --- /dev/null +++ b/drivers/media/tuners/fc2580.c @@ -0,0 +1,623 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * FCI FC2580 silicon tuner driver + * + * Copyright (C) 2012 Antti Palosaari <crope@iki.fi> + */ + +#include "fc2580_priv.h" + +/* + * TODO: + * I2C write and read works only for one single register. Multiple registers + * could not be accessed using normal register address auto-increment. + * There could be (very likely) register to change that behavior.... + */ + +/* write single register conditionally only when value differs from 0xff + * XXX: This is special routine meant only for writing fc2580_freq_regs_lut[] + * values. Do not use for the other purposes. */ +static int fc2580_wr_reg_ff(struct fc2580_dev *dev, u8 reg, u8 val) +{ + if (val == 0xff) + return 0; + else + return regmap_write(dev->regmap, reg, val); +} + +static int fc2580_set_params(struct fc2580_dev *dev) +{ + struct i2c_client *client = dev->client; + int ret, i; + unsigned int uitmp, div_ref, div_ref_val, div_n, k, k_cw, div_out; + u64 f_vco; + u8 synth_config; + unsigned long timeout; + + if (!dev->active) { + dev_dbg(&client->dev, "tuner is sleeping\n"); + return 0; + } + + /* + * Fractional-N synthesizer + * + * +---------------------------------------+ + * v | + * Fref +----+ +----+ +-------+ +----+ +------+ +---+ + * ------> | /R | --> | PD | --> | VCO | ------> | /2 | --> | /N.F | <-- | K | + * +----+ +----+ +-------+ +----+ +------+ +---+ + * | + * | + * v + * +-------+ Fout + * | /Rout | ------> + * +-------+ + */ + for (i = 0; i < ARRAY_SIZE(fc2580_pll_lut); i++) { + if (dev->f_frequency <= fc2580_pll_lut[i].freq) + break; + } + if (i == ARRAY_SIZE(fc2580_pll_lut)) { + ret = -EINVAL; + goto err; + } + + #define DIV_PRE_N 2 + #define F_REF dev->clk + div_out = fc2580_pll_lut[i].div_out; + f_vco = (u64) dev->f_frequency * div_out; + synth_config = fc2580_pll_lut[i].band; + if (f_vco < 2600000000ULL) + synth_config |= 0x06; + else + synth_config |= 0x0e; + + /* select reference divider R (keep PLL div N in valid range) */ + #define DIV_N_MIN 76 + if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 1)) { + div_ref = 1; + div_ref_val = 0x00; + } else if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 2)) { + div_ref = 2; + div_ref_val = 0x10; + } else { + div_ref = 4; + div_ref_val = 0x20; + } + + /* calculate PLL integer and fractional control word */ + uitmp = DIV_PRE_N * F_REF / div_ref; + div_n = div_u64_rem(f_vco, uitmp, &k); + k_cw = div_u64((u64) k * 0x100000, uitmp); + + dev_dbg(&client->dev, + "frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_ref=%u div_n=%u k=%u div_out=%u k_cw=%0x\n", + dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_ref, + div_n, k, div_out, k_cw); + + ret = regmap_write(dev->regmap, 0x02, synth_config); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x18, div_ref_val << 0 | k_cw >> 16); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x1a, (k_cw >> 8) & 0xff); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x1b, (k_cw >> 0) & 0xff); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x1c, div_n); + if (ret) + goto err; + + /* registers */ + for (i = 0; i < ARRAY_SIZE(fc2580_freq_regs_lut); i++) { + if (dev->f_frequency <= fc2580_freq_regs_lut[i].freq) + break; + } + if (i == ARRAY_SIZE(fc2580_freq_regs_lut)) { + ret = -EINVAL; + goto err; + } + + ret = fc2580_wr_reg_ff(dev, 0x25, fc2580_freq_regs_lut[i].r25_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x27, fc2580_freq_regs_lut[i].r27_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x28, fc2580_freq_regs_lut[i].r28_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x29, fc2580_freq_regs_lut[i].r29_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x2b, fc2580_freq_regs_lut[i].r2b_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x2c, fc2580_freq_regs_lut[i].r2c_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x2d, fc2580_freq_regs_lut[i].r2d_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x30, fc2580_freq_regs_lut[i].r30_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x44, fc2580_freq_regs_lut[i].r44_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x50, fc2580_freq_regs_lut[i].r50_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x53, fc2580_freq_regs_lut[i].r53_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x5f, fc2580_freq_regs_lut[i].r5f_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x61, fc2580_freq_regs_lut[i].r61_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x62, fc2580_freq_regs_lut[i].r62_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x63, fc2580_freq_regs_lut[i].r63_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x67, fc2580_freq_regs_lut[i].r67_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x68, fc2580_freq_regs_lut[i].r68_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x69, fc2580_freq_regs_lut[i].r69_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x6a, fc2580_freq_regs_lut[i].r6a_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x6b, fc2580_freq_regs_lut[i].r6b_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x6c, fc2580_freq_regs_lut[i].r6c_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x6d, fc2580_freq_regs_lut[i].r6d_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x6e, fc2580_freq_regs_lut[i].r6e_val); + if (ret) + goto err; + + ret = fc2580_wr_reg_ff(dev, 0x6f, fc2580_freq_regs_lut[i].r6f_val); + if (ret) + goto err; + + /* IF filters */ + for (i = 0; i < ARRAY_SIZE(fc2580_if_filter_lut); i++) { + if (dev->f_bandwidth <= fc2580_if_filter_lut[i].freq) + break; + } + if (i == ARRAY_SIZE(fc2580_if_filter_lut)) { + ret = -EINVAL; + goto err; + } + + ret = regmap_write(dev->regmap, 0x36, fc2580_if_filter_lut[i].r36_val); + if (ret) + goto err; + + uitmp = (unsigned int) 8058000 - (dev->f_bandwidth * 122 / 100 / 2); + uitmp = div64_u64((u64) dev->clk * uitmp, 1000000000000ULL); + ret = regmap_write(dev->regmap, 0x37, uitmp); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x39, fc2580_if_filter_lut[i].r39_val); + if (ret) + goto err; + + timeout = jiffies + msecs_to_jiffies(30); + for (uitmp = ~0xc0; !time_after(jiffies, timeout) && uitmp != 0xc0;) { + /* trigger filter */ + ret = regmap_write(dev->regmap, 0x2e, 0x09); + if (ret) + goto err; + + /* locked when [7:6] are set (val: d7 6MHz, d5 7MHz, cd 8MHz) */ + ret = regmap_read(dev->regmap, 0x2f, &uitmp); + if (ret) + goto err; + uitmp &= 0xc0; + + ret = regmap_write(dev->regmap, 0x2e, 0x01); + if (ret) + goto err; + } + if (uitmp != 0xc0) + dev_dbg(&client->dev, "filter did not lock %02x\n", uitmp); + + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int fc2580_init(struct fc2580_dev *dev) +{ + struct i2c_client *client = dev->client; + int ret, i; + + dev_dbg(&client->dev, "\n"); + + for (i = 0; i < ARRAY_SIZE(fc2580_init_reg_vals); i++) { + ret = regmap_write(dev->regmap, fc2580_init_reg_vals[i].reg, + fc2580_init_reg_vals[i].val); + if (ret) + goto err; + } + + dev->active = true; + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static int fc2580_sleep(struct fc2580_dev *dev) +{ + struct i2c_client *client = dev->client; + int ret; + + dev_dbg(&client->dev, "\n"); + + dev->active = false; + + ret = regmap_write(dev->regmap, 0x02, 0x0a); + if (ret) + goto err; + return 0; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +/* + * DVB API + */ +static int fc2580_dvb_set_params(struct dvb_frontend *fe) +{ + struct fc2580_dev *dev = fe->tuner_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + dev->f_frequency = c->frequency; + dev->f_bandwidth = c->bandwidth_hz; + return fc2580_set_params(dev); +} + +static int fc2580_dvb_init(struct dvb_frontend *fe) +{ + return fc2580_init(fe->tuner_priv); +} + +static int fc2580_dvb_sleep(struct dvb_frontend *fe) +{ + return fc2580_sleep(fe->tuner_priv); +} + +static int fc2580_dvb_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + *frequency = 0; /* Zero-IF */ + return 0; +} + +static const struct dvb_tuner_ops fc2580_dvb_tuner_ops = { + .info = { + .name = "FCI FC2580", + .frequency_min_hz = 174 * MHz, + .frequency_max_hz = 862 * MHz, + }, + + .init = fc2580_dvb_init, + .sleep = fc2580_dvb_sleep, + .set_params = fc2580_dvb_set_params, + + .get_if_frequency = fc2580_dvb_get_if_frequency, +}; + +/* + * V4L2 API + */ +#if IS_ENABLED(CONFIG_VIDEO_DEV) +static const struct v4l2_frequency_band bands[] = { + { + .type = V4L2_TUNER_RF, + .index = 0, + .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS, + .rangelow = 130000000, + .rangehigh = 2000000000, + }, +}; + +static inline struct fc2580_dev *fc2580_subdev_to_dev(struct v4l2_subdev *sd) +{ + return container_of(sd, struct fc2580_dev, subdev); +} + +static int fc2580_standby(struct v4l2_subdev *sd) +{ + struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); + int ret; + + ret = fc2580_sleep(dev); + if (ret) + return ret; + + return fc2580_set_params(dev); +} + +static int fc2580_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v) +{ + struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); + struct i2c_client *client = dev->client; + + dev_dbg(&client->dev, "index=%d\n", v->index); + + strscpy(v->name, "FCI FC2580", sizeof(v->name)); + v->type = V4L2_TUNER_RF; + v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS; + v->rangelow = bands[0].rangelow; + v->rangehigh = bands[0].rangehigh; + return 0; +} + +static int fc2580_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v) +{ + struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); + struct i2c_client *client = dev->client; + + dev_dbg(&client->dev, "index=%d\n", v->index); + return 0; +} + +static int fc2580_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f) +{ + struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); + struct i2c_client *client = dev->client; + + dev_dbg(&client->dev, "tuner=%d\n", f->tuner); + f->frequency = dev->f_frequency; + return 0; +} + +static int fc2580_s_frequency(struct v4l2_subdev *sd, + const struct v4l2_frequency *f) +{ + struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); + struct i2c_client *client = dev->client; + + dev_dbg(&client->dev, "tuner=%d type=%d frequency=%u\n", + f->tuner, f->type, f->frequency); + + dev->f_frequency = clamp_t(unsigned int, f->frequency, + bands[0].rangelow, bands[0].rangehigh); + return fc2580_set_params(dev); +} + +static int fc2580_enum_freq_bands(struct v4l2_subdev *sd, + struct v4l2_frequency_band *band) +{ + struct fc2580_dev *dev = fc2580_subdev_to_dev(sd); + struct i2c_client *client = dev->client; + + dev_dbg(&client->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 fc2580_subdev_tuner_ops = { + .standby = fc2580_standby, + .g_tuner = fc2580_g_tuner, + .s_tuner = fc2580_s_tuner, + .g_frequency = fc2580_g_frequency, + .s_frequency = fc2580_s_frequency, + .enum_freq_bands = fc2580_enum_freq_bands, +}; + +static const struct v4l2_subdev_ops fc2580_subdev_ops = { + .tuner = &fc2580_subdev_tuner_ops, +}; + +static int fc2580_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct fc2580_dev *dev = container_of(ctrl->handler, struct fc2580_dev, hdl); + struct i2c_client *client = dev->client; + int ret; + + dev_dbg(&client->dev, "ctrl: id=%d name=%s cur.val=%d val=%d\n", + ctrl->id, ctrl->name, ctrl->cur.val, ctrl->val); + + switch (ctrl->id) { + case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: + case V4L2_CID_RF_TUNER_BANDWIDTH: + /* + * TODO: Auto logic does not work 100% correctly as tuner driver + * do not have information to calculate maximum suitable + * bandwidth. Calculating it is responsible of master driver. + */ + dev->f_bandwidth = dev->bandwidth->val; + ret = fc2580_set_params(dev); + break; + default: + dev_dbg(&client->dev, "unknown ctrl"); + ret = -EINVAL; + } + return ret; +} + +static const struct v4l2_ctrl_ops fc2580_ctrl_ops = { + .s_ctrl = fc2580_s_ctrl, +}; +#endif + +static struct v4l2_subdev *fc2580_get_v4l2_subdev(struct i2c_client *client) +{ + struct fc2580_dev *dev = i2c_get_clientdata(client); + + if (dev->subdev.ops) + return &dev->subdev; + else + return NULL; +} + +static int fc2580_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct fc2580_dev *dev; + struct fc2580_platform_data *pdata = client->dev.platform_data; + struct dvb_frontend *fe = pdata->dvb_frontend; + int ret; + unsigned int uitmp; + static const struct regmap_config regmap_config = { + .reg_bits = 8, + .val_bits = 8, + }; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) { + ret = -ENOMEM; + goto err; + } + + if (pdata->clk) + dev->clk = pdata->clk; + else + dev->clk = 16384000; /* internal clock */ + dev->client = client; + dev->regmap = devm_regmap_init_i2c(client, ®map_config); + if (IS_ERR(dev->regmap)) { + ret = PTR_ERR(dev->regmap); + goto err_kfree; + } + + /* check if the tuner is there */ + ret = regmap_read(dev->regmap, 0x01, &uitmp); + if (ret) + goto err_kfree; + + dev_dbg(&client->dev, "chip_id=%02x\n", uitmp); + + switch (uitmp) { + case 0x56: + case 0x5a: + break; + default: + ret = -ENODEV; + goto err_kfree; + } + +#if IS_ENABLED(CONFIG_VIDEO_DEV) + /* Register controls */ + v4l2_ctrl_handler_init(&dev->hdl, 2); + dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops, + V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, + 0, 1, 1, 1); + dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops, + V4L2_CID_RF_TUNER_BANDWIDTH, + 3000, 10000000, 1, 3000); + v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false); + if (dev->hdl.error) { + ret = dev->hdl.error; + dev_err(&client->dev, "Could not initialize controls\n"); + v4l2_ctrl_handler_free(&dev->hdl); + goto err_kfree; + } + dev->subdev.ctrl_handler = &dev->hdl; + dev->f_frequency = bands[0].rangelow; + dev->f_bandwidth = dev->bandwidth->val; + v4l2_i2c_subdev_init(&dev->subdev, client, &fc2580_subdev_ops); +#endif + fe->tuner_priv = dev; + memcpy(&fe->ops.tuner_ops, &fc2580_dvb_tuner_ops, + sizeof(fe->ops.tuner_ops)); + pdata->get_v4l2_subdev = fc2580_get_v4l2_subdev; + i2c_set_clientdata(client, dev); + + dev_info(&client->dev, "FCI FC2580 successfully identified\n"); + return 0; +err_kfree: + kfree(dev); +err: + dev_dbg(&client->dev, "failed=%d\n", ret); + return ret; +} + +static void fc2580_remove(struct i2c_client *client) +{ + struct fc2580_dev *dev = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + +#if IS_ENABLED(CONFIG_VIDEO_DEV) + v4l2_ctrl_handler_free(&dev->hdl); +#endif + kfree(dev); +} + +static const struct i2c_device_id fc2580_id_table[] = { + {"fc2580", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, fc2580_id_table); + +static struct i2c_driver fc2580_driver = { + .driver = { + .name = "fc2580", + .suppress_bind_attrs = true, + }, + .probe = fc2580_probe, + .remove = fc2580_remove, + .id_table = fc2580_id_table, +}; + +module_i2c_driver(fc2580_driver); + +MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver"); +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_LICENSE("GPL"); |