| /* |
| * 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" |
| |
| /* Max transfer size done by I2C transfer functions */ |
| #define MAX_XFER_SIZE 64 |
| |
| /* |
| * 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.... |
| * |
| * Due to that limitation functions: |
| * fc2580_wr_regs() |
| * fc2580_rd_regs() |
| * could not be used for accessing more than one register at once. |
| * |
| * TODO: |
| * Currently it blind writes bunch of static registers from the |
| * fc2580_freq_regs_lut[] when fc2580_set_params() is called. Add some |
| * logic to reduce unneeded register writes. |
| */ |
| |
| /* write multiple registers */ |
| static int fc2580_wr_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len) |
| { |
| int ret; |
| u8 buf[MAX_XFER_SIZE]; |
| struct i2c_msg msg[1] = { |
| { |
| .addr = priv->i2c_addr, |
| .flags = 0, |
| .len = 1 + len, |
| .buf = buf, |
| } |
| }; |
| |
| if (1 + len > sizeof(buf)) { |
| dev_warn(&priv->i2c->dev, |
| "%s: i2c wr reg=%04x: len=%d is too big!\n", |
| KBUILD_MODNAME, reg, len); |
| return -EINVAL; |
| } |
| |
| buf[0] = reg; |
| memcpy(&buf[1], val, len); |
| |
| ret = i2c_transfer(priv->i2c, msg, 1); |
| if (ret == 1) { |
| ret = 0; |
| } else { |
| dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \ |
| "len=%d\n", KBUILD_MODNAME, ret, reg, len); |
| ret = -EREMOTEIO; |
| } |
| return ret; |
| } |
| |
| /* read multiple registers */ |
| static int fc2580_rd_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len) |
| { |
| int ret; |
| u8 buf[MAX_XFER_SIZE]; |
| struct i2c_msg msg[2] = { |
| { |
| .addr = priv->i2c_addr, |
| .flags = 0, |
| .len = 1, |
| .buf = ®, |
| }, { |
| .addr = priv->i2c_addr, |
| .flags = I2C_M_RD, |
| .len = len, |
| .buf = buf, |
| } |
| }; |
| |
| if (len > sizeof(buf)) { |
| dev_warn(&priv->i2c->dev, |
| "%s: i2c rd reg=%04x: len=%d is too big!\n", |
| KBUILD_MODNAME, reg, len); |
| return -EINVAL; |
| } |
| |
| ret = i2c_transfer(priv->i2c, msg, 2); |
| if (ret == 2) { |
| memcpy(val, buf, len); |
| ret = 0; |
| } else { |
| dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \ |
| "len=%d\n", KBUILD_MODNAME, ret, reg, len); |
| ret = -EREMOTEIO; |
| } |
| |
| return ret; |
| } |
| |
| /* write single register */ |
| static int fc2580_wr_reg(struct fc2580_priv *priv, u8 reg, u8 val) |
| { |
| return fc2580_wr_regs(priv, reg, &val, 1); |
| } |
| |
| /* read single register */ |
| static int fc2580_rd_reg(struct fc2580_priv *priv, u8 reg, u8 *val) |
| { |
| return fc2580_rd_regs(priv, reg, val, 1); |
| } |
| |
| /* 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_priv *priv, u8 reg, u8 val) |
| { |
| if (val == 0xff) |
| return 0; |
| else |
| return fc2580_wr_regs(priv, reg, &val, 1); |
| } |
| |
| static int fc2580_set_params(struct dvb_frontend *fe) |
| { |
| struct fc2580_priv *priv = fe->tuner_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int ret = 0, i; |
| unsigned int r_val, n_val, k_val, k_val_reg, f_ref; |
| u8 tmp_val, r18_val; |
| u64 f_vco; |
| |
| /* |
| * Fractional-N synthesizer/PLL. |
| * Most likely all those PLL calculations are not correct. I am not |
| * sure, but it looks like it is divider based Fractional-N synthesizer. |
| * There is divider for reference clock too? |
| * Anyhow, synthesizer calculation results seems to be quite correct. |
| */ |
| |
| dev_dbg(&priv->i2c->dev, "%s: delivery_system=%d frequency=%d " \ |
| "bandwidth_hz=%d\n", __func__, |
| c->delivery_system, c->frequency, c->bandwidth_hz); |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| |
| /* PLL */ |
| 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)) |
| goto err; |
| |
| f_vco = c->frequency; |
| f_vco *= fc2580_pll_lut[i].div; |
| |
| if (f_vco >= 2600000000UL) |
| tmp_val = 0x0e | fc2580_pll_lut[i].band; |
| else |
| tmp_val = 0x06 | fc2580_pll_lut[i].band; |
| |
| ret = fc2580_wr_reg(priv, 0x02, tmp_val); |
| if (ret < 0) |
| goto err; |
| |
| if (f_vco >= 2UL * 76 * priv->clk) { |
| r_val = 1; |
| r18_val = 0x00; |
| } else if (f_vco >= 1UL * 76 * priv->clk) { |
| r_val = 2; |
| r18_val = 0x10; |
| } else { |
| r_val = 4; |
| r18_val = 0x20; |
| } |
| |
| f_ref = 2UL * priv->clk / r_val; |
| n_val = div_u64_rem(f_vco, f_ref, &k_val); |
| k_val_reg = div_u64(1ULL * k_val * (1 << 20), f_ref); |
| |
| ret = fc2580_wr_reg(priv, 0x18, r18_val | ((k_val_reg >> 16) & 0xff)); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg(priv, 0x1a, (k_val_reg >> 8) & 0xff); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg(priv, 0x1b, (k_val_reg >> 0) & 0xff); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg(priv, 0x1c, n_val); |
| if (ret < 0) |
| goto err; |
| |
| if (priv->clk >= 28000000) { |
| ret = fc2580_wr_reg(priv, 0x4b, 0x22); |
| if (ret < 0) |
| goto err; |
| } |
| |
| if (fc2580_pll_lut[i].band == 0x00) { |
| if (c->frequency <= 794000000) |
| tmp_val = 0x9f; |
| else |
| tmp_val = 0x8f; |
| |
| ret = fc2580_wr_reg(priv, 0x2d, tmp_val); |
| if (ret < 0) |
| 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)) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x25, fc2580_freq_regs_lut[i].r25_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x27, fc2580_freq_regs_lut[i].r27_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x28, fc2580_freq_regs_lut[i].r28_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x29, fc2580_freq_regs_lut[i].r29_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x2b, fc2580_freq_regs_lut[i].r2b_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x2c, fc2580_freq_regs_lut[i].r2c_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x2d, fc2580_freq_regs_lut[i].r2d_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x30, fc2580_freq_regs_lut[i].r30_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x44, fc2580_freq_regs_lut[i].r44_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x50, fc2580_freq_regs_lut[i].r50_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x53, fc2580_freq_regs_lut[i].r53_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x5f, fc2580_freq_regs_lut[i].r5f_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x61, fc2580_freq_regs_lut[i].r61_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x62, fc2580_freq_regs_lut[i].r62_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x63, fc2580_freq_regs_lut[i].r63_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x67, fc2580_freq_regs_lut[i].r67_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x68, fc2580_freq_regs_lut[i].r68_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x69, fc2580_freq_regs_lut[i].r69_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x6a, fc2580_freq_regs_lut[i].r6a_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x6b, fc2580_freq_regs_lut[i].r6b_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x6c, fc2580_freq_regs_lut[i].r6c_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x6d, fc2580_freq_regs_lut[i].r6d_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x6e, fc2580_freq_regs_lut[i].r6e_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg_ff(priv, 0x6f, fc2580_freq_regs_lut[i].r6f_val); |
| if (ret < 0) |
| 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)) |
| goto err; |
| |
| ret = fc2580_wr_reg(priv, 0x36, fc2580_if_filter_lut[i].r36_val); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg(priv, 0x37, div_u64(1ULL * priv->clk * |
| fc2580_if_filter_lut[i].mul, 1000000000)); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg(priv, 0x39, fc2580_if_filter_lut[i].r39_val); |
| if (ret < 0) |
| goto err; |
| |
| /* calibration? */ |
| ret = fc2580_wr_reg(priv, 0x2e, 0x09); |
| if (ret < 0) |
| goto err; |
| |
| for (i = 0; i < 5; i++) { |
| ret = fc2580_rd_reg(priv, 0x2f, &tmp_val); |
| if (ret < 0) |
| goto err; |
| |
| /* done when [7:6] are set */ |
| if ((tmp_val & 0xc0) == 0xc0) |
| break; |
| |
| ret = fc2580_wr_reg(priv, 0x2e, 0x01); |
| if (ret < 0) |
| goto err; |
| |
| ret = fc2580_wr_reg(priv, 0x2e, 0x09); |
| if (ret < 0) |
| goto err; |
| |
| usleep_range(5000, 25000); |
| } |
| |
| dev_dbg(&priv->i2c->dev, "%s: loop=%i\n", __func__, i); |
| |
| ret = fc2580_wr_reg(priv, 0x2e, 0x01); |
| if (ret < 0) |
| goto err; |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| return 0; |
| err: |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int fc2580_init(struct dvb_frontend *fe) |
| { |
| struct fc2580_priv *priv = fe->tuner_priv; |
| int ret, i; |
| |
| dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| |
| for (i = 0; i < ARRAY_SIZE(fc2580_init_reg_vals); i++) { |
| ret = fc2580_wr_reg(priv, fc2580_init_reg_vals[i].reg, |
| fc2580_init_reg_vals[i].val); |
| if (ret < 0) |
| goto err; |
| } |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| return 0; |
| err: |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int fc2580_sleep(struct dvb_frontend *fe) |
| { |
| struct fc2580_priv *priv = fe->tuner_priv; |
| int ret; |
| |
| dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| |
| ret = fc2580_wr_reg(priv, 0x02, 0x0a); |
| if (ret < 0) |
| goto err; |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| return 0; |
| err: |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
| return ret; |
| } |
| |
| static int fc2580_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
| { |
| struct fc2580_priv *priv = fe->tuner_priv; |
| |
| dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
| |
| *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_priv *dev; |
| struct fc2580_platform_data *pdata = client->dev.platform_data; |
| struct dvb_frontend *fe = pdata->dvb_frontend; |
| int ret; |
| u8 chip_id; |
| |
| 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->i2c = client->adapter; |
| dev->i2c_addr = client->addr; |
| |
| /* check if the tuner is there */ |
| ret = fc2580_rd_reg(dev, 0x01, &chip_id); |
| if (ret < 0) |
| goto err_kfree; |
| |
| dev_dbg(&client->dev, "chip_id=%02x\n", chip_id); |
| |
| switch (chip_id) { |
| 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_priv *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"); |