| /* |
| * FCI FC2580 silicon tuner driver |
| * |
| * Copyright (C) 2012 Antti Palosaari <crope@iki.fi> |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| #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 dvb_frontend *fe) |
| { |
| struct fc2580_dev *dev = fe->tuner_priv; |
| struct i2c_client *client = dev->client; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| 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; |
| |
| dev_dbg(&client->dev, |
| "delivery_system=%u frequency=%u bandwidth_hz=%u\n", |
| c->delivery_system, c->frequency, c->bandwidth_hz); |
| |
| /* |
| * 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 (c->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) c->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 f_vco=%llu F_REF=%u div_ref=%u div_n=%u k=%u div_out=%u k_cw=%0x\n", |
| c->frequency, 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 (c->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 (c->bandwidth_hz <= 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 - (c->bandwidth_hz * 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 dvb_frontend *fe) |
| { |
| struct fc2580_dev *dev = fe->tuner_priv; |
| 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; |
| } |
| |
| return 0; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static int fc2580_sleep(struct dvb_frontend *fe) |
| { |
| struct fc2580_dev *dev = fe->tuner_priv; |
| struct i2c_client *client = dev->client; |
| int ret; |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| ret = regmap_write(dev->regmap, 0x02, 0x0a); |
| if (ret) |
| goto err; |
| |
| return 0; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static int fc2580_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
| { |
| struct fc2580_dev *dev = fe->tuner_priv; |
| struct i2c_client *client = dev->client; |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| *frequency = 0; /* Zero-IF */ |
| |
| return 0; |
| } |
| |
| static const struct dvb_tuner_ops fc2580_tuner_ops = { |
| .info = { |
| .name = "FCI FC2580", |
| .frequency_min = 174000000, |
| .frequency_max = 862000000, |
| }, |
| |
| .init = fc2580_init, |
| .sleep = fc2580_sleep, |
| .set_params = fc2580_set_params, |
| |
| .get_if_frequency = fc2580_get_if_frequency, |
| }; |
| |
| 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: |
| goto err_kfree; |
| } |
| |
| fe->tuner_priv = dev; |
| memcpy(&fe->ops.tuner_ops, &fc2580_tuner_ops, |
| sizeof(struct dvb_tuner_ops)); |
| 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 int fc2580_remove(struct i2c_client *client) |
| { |
| struct fc2580_dev *dev = i2c_get_clientdata(client); |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| kfree(dev); |
| return 0; |
| } |
| |
| 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 = { |
| .owner = THIS_MODULE, |
| .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"); |