| /* |
| Montage Technology TS2020 - Silicon Tuner driver |
| Copyright (C) 2009-2012 Konstantin Dimitrov <kosio.dimitrov@gmail.com> |
| |
| Copyright (C) 2009-2012 TurboSight.com |
| |
| 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include "dvb_frontend.h" |
| #include "ts2020.h" |
| |
| #define TS2020_XTAL_FREQ 27000 /* in kHz */ |
| #define FREQ_OFFSET_LOW_SYM_RATE 3000 |
| |
| struct ts2020_priv { |
| struct dvb_frontend *fe; |
| /* i2c details */ |
| int i2c_address; |
| struct i2c_adapter *i2c; |
| u8 clk_out:2; |
| u8 clk_out_div:5; |
| u32 frequency; |
| u32 frequency_div; |
| #define TS2020_M88TS2020 0 |
| #define TS2020_M88TS2022 1 |
| u8 tuner; |
| u8 loop_through:1; |
| }; |
| |
| struct ts2020_reg_val { |
| u8 reg; |
| u8 val; |
| }; |
| |
| static int ts2020_release(struct dvb_frontend *fe) |
| { |
| kfree(fe->tuner_priv); |
| fe->tuner_priv = NULL; |
| return 0; |
| } |
| |
| static int ts2020_writereg(struct dvb_frontend *fe, int reg, int data) |
| { |
| struct ts2020_priv *priv = fe->tuner_priv; |
| u8 buf[] = { reg, data }; |
| struct i2c_msg msg[] = { |
| { |
| .addr = priv->i2c_address, |
| .flags = 0, |
| .buf = buf, |
| .len = 2 |
| } |
| }; |
| int err; |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| |
| err = i2c_transfer(priv->i2c, msg, 1); |
| if (err != 1) { |
| printk(KERN_ERR |
| "%s: writereg error(err == %i, reg == 0x%02x, value == 0x%02x)\n", |
| __func__, err, reg, data); |
| return -EREMOTEIO; |
| } |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| return 0; |
| } |
| |
| static int ts2020_readreg(struct dvb_frontend *fe, u8 reg) |
| { |
| struct ts2020_priv *priv = fe->tuner_priv; |
| int ret; |
| u8 b0[] = { reg }; |
| u8 b1[] = { 0 }; |
| struct i2c_msg msg[] = { |
| { |
| .addr = priv->i2c_address, |
| .flags = 0, |
| .buf = b0, |
| .len = 1 |
| }, { |
| .addr = priv->i2c_address, |
| .flags = I2C_M_RD, |
| .buf = b1, |
| .len = 1 |
| } |
| }; |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| |
| ret = i2c_transfer(priv->i2c, msg, 2); |
| |
| if (ret != 2) { |
| printk(KERN_ERR "%s: reg=0x%x(error=%d)\n", |
| __func__, reg, ret); |
| return ret; |
| } |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| return b1[0]; |
| } |
| |
| static int ts2020_sleep(struct dvb_frontend *fe) |
| { |
| struct ts2020_priv *priv = fe->tuner_priv; |
| u8 u8tmp; |
| |
| if (priv->tuner == TS2020_M88TS2020) |
| u8tmp = 0x0a; /* XXX: probably wrong */ |
| else |
| u8tmp = 0x00; |
| |
| return ts2020_writereg(fe, u8tmp, 0x00); |
| } |
| |
| static int ts2020_init(struct dvb_frontend *fe) |
| { |
| struct ts2020_priv *priv = fe->tuner_priv; |
| int i; |
| u8 u8tmp; |
| |
| if (priv->tuner == TS2020_M88TS2020) { |
| ts2020_writereg(fe, 0x42, 0x73); |
| ts2020_writereg(fe, 0x05, priv->clk_out_div); |
| ts2020_writereg(fe, 0x20, 0x27); |
| ts2020_writereg(fe, 0x07, 0x02); |
| ts2020_writereg(fe, 0x11, 0xff); |
| ts2020_writereg(fe, 0x60, 0xf9); |
| ts2020_writereg(fe, 0x08, 0x01); |
| ts2020_writereg(fe, 0x00, 0x41); |
| } else { |
| static const struct ts2020_reg_val reg_vals[] = { |
| {0x7d, 0x9d}, |
| {0x7c, 0x9a}, |
| {0x7a, 0x76}, |
| {0x3b, 0x01}, |
| {0x63, 0x88}, |
| {0x61, 0x85}, |
| {0x22, 0x30}, |
| {0x30, 0x40}, |
| {0x20, 0x23}, |
| {0x24, 0x02}, |
| {0x12, 0xa0}, |
| }; |
| |
| ts2020_writereg(fe, 0x00, 0x01); |
| ts2020_writereg(fe, 0x00, 0x03); |
| |
| switch (priv->clk_out) { |
| case TS2020_CLK_OUT_DISABLED: |
| u8tmp = 0x60; |
| break; |
| case TS2020_CLK_OUT_ENABLED: |
| u8tmp = 0x70; |
| ts2020_writereg(fe, 0x05, priv->clk_out_div); |
| break; |
| case TS2020_CLK_OUT_ENABLED_XTALOUT: |
| u8tmp = 0x6c; |
| break; |
| default: |
| u8tmp = 0x60; |
| break; |
| } |
| |
| ts2020_writereg(fe, 0x42, u8tmp); |
| |
| if (priv->loop_through) |
| u8tmp = 0xec; |
| else |
| u8tmp = 0x6c; |
| |
| ts2020_writereg(fe, 0x62, u8tmp); |
| |
| for (i = 0; i < ARRAY_SIZE(reg_vals); i++) |
| ts2020_writereg(fe, reg_vals[i].reg, reg_vals[i].val); |
| } |
| |
| return 0; |
| } |
| |
| static int ts2020_tuner_gate_ctrl(struct dvb_frontend *fe, u8 offset) |
| { |
| int ret; |
| ret = ts2020_writereg(fe, 0x51, 0x1f - offset); |
| ret |= ts2020_writereg(fe, 0x51, 0x1f); |
| ret |= ts2020_writereg(fe, 0x50, offset); |
| ret |= ts2020_writereg(fe, 0x50, 0x00); |
| msleep(20); |
| return ret; |
| } |
| |
| static int ts2020_set_tuner_rf(struct dvb_frontend *fe) |
| { |
| int reg; |
| |
| reg = ts2020_readreg(fe, 0x3d); |
| reg &= 0x7f; |
| if (reg < 0x16) |
| reg = 0xa1; |
| else if (reg == 0x16) |
| reg = 0x99; |
| else |
| reg = 0xf9; |
| |
| ts2020_writereg(fe, 0x60, reg); |
| reg = ts2020_tuner_gate_ctrl(fe, 0x08); |
| |
| return reg; |
| } |
| |
| static int ts2020_set_params(struct dvb_frontend *fe) |
| { |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| struct ts2020_priv *priv = fe->tuner_priv; |
| int ret; |
| u32 frequency = c->frequency; |
| s32 offset_khz; |
| u32 symbol_rate = (c->symbol_rate / 1000); |
| u32 f3db, gdiv28; |
| u16 value, ndiv, lpf_coeff; |
| u8 lpf_mxdiv, mlpf_max, mlpf_min, nlpf; |
| u8 lo = 0x01, div4 = 0x0; |
| |
| /* Calculate frequency divider */ |
| if (frequency < priv->frequency_div) { |
| lo |= 0x10; |
| div4 = 0x1; |
| ndiv = (frequency * 14 * 4) / TS2020_XTAL_FREQ; |
| } else |
| ndiv = (frequency * 14 * 2) / TS2020_XTAL_FREQ; |
| ndiv = ndiv + ndiv % 2; |
| ndiv = ndiv - 1024; |
| |
| if (priv->tuner == TS2020_M88TS2020) { |
| lpf_coeff = 2766; |
| ret = ts2020_writereg(fe, 0x10, 0x80 | lo); |
| } else { |
| lpf_coeff = 3200; |
| ret = ts2020_writereg(fe, 0x10, 0x0b); |
| ret |= ts2020_writereg(fe, 0x11, 0x40); |
| } |
| |
| /* Set frequency divider */ |
| ret |= ts2020_writereg(fe, 0x01, (ndiv >> 8) & 0xf); |
| ret |= ts2020_writereg(fe, 0x02, ndiv & 0xff); |
| |
| ret |= ts2020_writereg(fe, 0x03, 0x06); |
| ret |= ts2020_tuner_gate_ctrl(fe, 0x10); |
| if (ret < 0) |
| return -ENODEV; |
| |
| /* Tuner Frequency Range */ |
| ret = ts2020_writereg(fe, 0x10, lo); |
| |
| ret |= ts2020_tuner_gate_ctrl(fe, 0x08); |
| |
| /* Tuner RF */ |
| if (priv->tuner == TS2020_M88TS2020) |
| ret |= ts2020_set_tuner_rf(fe); |
| |
| gdiv28 = (TS2020_XTAL_FREQ / 1000 * 1694 + 500) / 1000; |
| ret |= ts2020_writereg(fe, 0x04, gdiv28 & 0xff); |
| ret |= ts2020_tuner_gate_ctrl(fe, 0x04); |
| if (ret < 0) |
| return -ENODEV; |
| |
| if (priv->tuner == TS2020_M88TS2022) { |
| ret = ts2020_writereg(fe, 0x25, 0x00); |
| ret |= ts2020_writereg(fe, 0x27, 0x70); |
| ret |= ts2020_writereg(fe, 0x41, 0x09); |
| ret |= ts2020_writereg(fe, 0x08, 0x0b); |
| if (ret < 0) |
| return -ENODEV; |
| } |
| |
| value = ts2020_readreg(fe, 0x26); |
| |
| f3db = (symbol_rate * 135) / 200 + 2000; |
| f3db += FREQ_OFFSET_LOW_SYM_RATE; |
| if (f3db < 7000) |
| f3db = 7000; |
| if (f3db > 40000) |
| f3db = 40000; |
| |
| gdiv28 = gdiv28 * 207 / (value * 2 + 151); |
| mlpf_max = gdiv28 * 135 / 100; |
| mlpf_min = gdiv28 * 78 / 100; |
| if (mlpf_max > 63) |
| mlpf_max = 63; |
| |
| nlpf = (f3db * gdiv28 * 2 / lpf_coeff / |
| (TS2020_XTAL_FREQ / 1000) + 1) / 2; |
| if (nlpf > 23) |
| nlpf = 23; |
| if (nlpf < 1) |
| nlpf = 1; |
| |
| lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000) |
| * lpf_coeff * 2 / f3db + 1) / 2; |
| |
| if (lpf_mxdiv < mlpf_min) { |
| nlpf++; |
| lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000) |
| * lpf_coeff * 2 / f3db + 1) / 2; |
| } |
| |
| if (lpf_mxdiv > mlpf_max) |
| lpf_mxdiv = mlpf_max; |
| |
| ret = ts2020_writereg(fe, 0x04, lpf_mxdiv); |
| ret |= ts2020_writereg(fe, 0x06, nlpf); |
| |
| ret |= ts2020_tuner_gate_ctrl(fe, 0x04); |
| |
| ret |= ts2020_tuner_gate_ctrl(fe, 0x01); |
| |
| msleep(80); |
| /* calculate offset assuming 96000kHz*/ |
| offset_khz = (ndiv - ndiv % 2 + 1024) * TS2020_XTAL_FREQ |
| / (6 + 8) / (div4 + 1) / 2; |
| |
| priv->frequency = offset_khz; |
| |
| return (ret < 0) ? -EINVAL : 0; |
| } |
| |
| static int ts2020_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
| { |
| struct ts2020_priv *priv = fe->tuner_priv; |
| *frequency = priv->frequency; |
| |
| return 0; |
| } |
| |
| static int ts2020_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
| { |
| *frequency = 0; /* Zero-IF */ |
| return 0; |
| } |
| |
| /* read TS2020 signal strength */ |
| static int ts2020_read_signal_strength(struct dvb_frontend *fe, |
| u16 *signal_strength) |
| { |
| u16 sig_reading, sig_strength; |
| u8 rfgain, bbgain; |
| |
| rfgain = ts2020_readreg(fe, 0x3d) & 0x1f; |
| bbgain = ts2020_readreg(fe, 0x21) & 0x1f; |
| |
| if (rfgain > 15) |
| rfgain = 15; |
| if (bbgain > 13) |
| bbgain = 13; |
| |
| sig_reading = rfgain * 2 + bbgain * 3; |
| |
| sig_strength = 40 + (64 - sig_reading) * 50 / 64 ; |
| |
| /* cook the value to be suitable for szap-s2 human readable output */ |
| *signal_strength = sig_strength * 1000; |
| |
| return 0; |
| } |
| |
| static struct dvb_tuner_ops ts2020_tuner_ops = { |
| .info = { |
| .name = "TS2020", |
| .frequency_min = 950000, |
| .frequency_max = 2150000 |
| }, |
| .init = ts2020_init, |
| .release = ts2020_release, |
| .sleep = ts2020_sleep, |
| .set_params = ts2020_set_params, |
| .get_frequency = ts2020_get_frequency, |
| .get_if_frequency = ts2020_get_if_frequency, |
| .get_rf_strength = ts2020_read_signal_strength, |
| }; |
| |
| struct dvb_frontend *ts2020_attach(struct dvb_frontend *fe, |
| const struct ts2020_config *config, |
| struct i2c_adapter *i2c) |
| { |
| struct ts2020_priv *priv = NULL; |
| u8 buf; |
| |
| priv = kzalloc(sizeof(struct ts2020_priv), GFP_KERNEL); |
| if (priv == NULL) |
| return NULL; |
| |
| priv->i2c_address = config->tuner_address; |
| priv->i2c = i2c; |
| priv->clk_out = config->clk_out; |
| priv->clk_out_div = config->clk_out_div; |
| priv->frequency_div = config->frequency_div; |
| priv->fe = fe; |
| fe->tuner_priv = priv; |
| |
| if (!priv->frequency_div) |
| priv->frequency_div = 1060000; |
| |
| /* Wake Up the tuner */ |
| if ((0x03 & ts2020_readreg(fe, 0x00)) == 0x00) { |
| ts2020_writereg(fe, 0x00, 0x01); |
| msleep(2); |
| } |
| |
| ts2020_writereg(fe, 0x00, 0x03); |
| msleep(2); |
| |
| /* Check the tuner version */ |
| buf = ts2020_readreg(fe, 0x00); |
| if ((buf == 0x01) || (buf == 0x41) || (buf == 0x81)) { |
| printk(KERN_INFO "%s: Find tuner TS2020!\n", __func__); |
| priv->tuner = TS2020_M88TS2020; |
| } else if ((buf == 0x83) || (buf == 0xc3)) { |
| printk(KERN_INFO "%s: Find tuner TS2022!\n", __func__); |
| priv->tuner = TS2020_M88TS2022; |
| } else { |
| printk(KERN_ERR "%s: Read tuner reg[0] = %d\n", __func__, buf); |
| kfree(priv); |
| return NULL; |
| } |
| |
| memcpy(&fe->ops.tuner_ops, &ts2020_tuner_ops, |
| sizeof(struct dvb_tuner_ops)); |
| |
| return fe; |
| } |
| EXPORT_SYMBOL(ts2020_attach); |
| |
| static int ts2020_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct ts2020_config *pdata = client->dev.platform_data; |
| struct dvb_frontend *fe = pdata->fe; |
| struct ts2020_priv *dev; |
| int ret; |
| u8 u8tmp; |
| unsigned int utmp; |
| char *chip_str; |
| |
| dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| if (!dev) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| dev->i2c = client->adapter; |
| dev->i2c_address = client->addr; |
| dev->clk_out = pdata->clk_out; |
| dev->clk_out_div = pdata->clk_out_div; |
| dev->frequency_div = pdata->frequency_div; |
| dev->fe = fe; |
| fe->tuner_priv = dev; |
| |
| /* check if the tuner is there */ |
| ret = ts2020_readreg(fe, 0x00); |
| if (ret < 0) |
| goto err; |
| utmp = ret; |
| |
| if ((utmp & 0x03) == 0x00) { |
| ret = ts2020_writereg(fe, 0x00, 0x01); |
| if (ret) |
| goto err; |
| |
| usleep_range(2000, 50000); |
| } |
| |
| ret = ts2020_writereg(fe, 0x00, 0x03); |
| if (ret) |
| goto err; |
| |
| usleep_range(2000, 50000); |
| |
| ret = ts2020_readreg(fe, 0x00); |
| if (ret < 0) |
| goto err; |
| utmp = ret; |
| |
| dev_dbg(&client->dev, "chip_id=%02x\n", utmp); |
| |
| switch (utmp) { |
| case 0x01: |
| case 0x41: |
| case 0x81: |
| dev->tuner = TS2020_M88TS2020; |
| chip_str = "TS2020"; |
| if (!dev->frequency_div) |
| dev->frequency_div = 1060000; |
| break; |
| case 0xc3: |
| case 0x83: |
| dev->tuner = TS2020_M88TS2022; |
| chip_str = "TS2022"; |
| if (!dev->frequency_div) |
| dev->frequency_div = 1103000; |
| break; |
| default: |
| ret = -ENODEV; |
| goto err; |
| } |
| |
| if (dev->tuner == TS2020_M88TS2022) { |
| switch (dev->clk_out) { |
| case TS2020_CLK_OUT_DISABLED: |
| u8tmp = 0x60; |
| break; |
| case TS2020_CLK_OUT_ENABLED: |
| u8tmp = 0x70; |
| ret = ts2020_writereg(fe, 0x05, dev->clk_out_div); |
| if (ret) |
| goto err; |
| break; |
| case TS2020_CLK_OUT_ENABLED_XTALOUT: |
| u8tmp = 0x6c; |
| break; |
| default: |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| ret = ts2020_writereg(fe, 0x42, u8tmp); |
| if (ret) |
| goto err; |
| |
| if (dev->loop_through) |
| u8tmp = 0xec; |
| else |
| u8tmp = 0x6c; |
| |
| ret = ts2020_writereg(fe, 0x62, u8tmp); |
| if (ret) |
| goto err; |
| } |
| |
| /* sleep */ |
| ret = ts2020_writereg(fe, 0x00, 0x00); |
| if (ret) |
| goto err; |
| |
| dev_info(&client->dev, |
| "Montage Technology %s successfully identified\n", chip_str); |
| |
| memcpy(&fe->ops.tuner_ops, &ts2020_tuner_ops, |
| sizeof(struct dvb_tuner_ops)); |
| fe->ops.tuner_ops.release = NULL; |
| |
| i2c_set_clientdata(client, dev); |
| return 0; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| kfree(dev); |
| return ret; |
| } |
| |
| static int ts2020_remove(struct i2c_client *client) |
| { |
| struct ts2020_priv *dev = i2c_get_clientdata(client); |
| struct dvb_frontend *fe = dev->fe; |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); |
| fe->tuner_priv = NULL; |
| kfree(dev); |
| |
| return 0; |
| } |
| |
| static const struct i2c_device_id ts2020_id_table[] = { |
| {"ts2020", 0}, |
| {"ts2022", 0}, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(i2c, ts2020_id_table); |
| |
| static struct i2c_driver ts2020_driver = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "ts2020", |
| }, |
| .probe = ts2020_probe, |
| .remove = ts2020_remove, |
| .id_table = ts2020_id_table, |
| }; |
| |
| module_i2c_driver(ts2020_driver); |
| |
| MODULE_AUTHOR("Konstantin Dimitrov <kosio.dimitrov@gmail.com>"); |
| MODULE_DESCRIPTION("Montage Technology TS2020 - Silicon tuner driver module"); |
| MODULE_LICENSE("GPL"); |
