/* * FCI FC2580 silicon tuner driver * * Copyright (C) 2012 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. * * 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 "); MODULE_LICENSE("GPL");