| /* |
| Driver for Philips tda8262/tda8263 DVBS Silicon tuners |
| |
| (c) 2006 Andrew de Quincey |
| |
| 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 <linux/module.h> |
| #include <linux/dvb/frontend.h> |
| #include <asm/types.h> |
| |
| #include "tda826x.h" |
| |
| struct tda826x_priv { |
| /* i2c details */ |
| int i2c_address; |
| struct i2c_adapter *i2c; |
| u8 has_loopthrough:1; |
| u32 frequency; |
| }; |
| |
| static int tda826x_release(struct dvb_frontend *fe) |
| { |
| if (fe->tuner_priv) |
| kfree(fe->tuner_priv); |
| fe->tuner_priv = NULL; |
| return 0; |
| } |
| |
| static int tda826x_sleep(struct dvb_frontend *fe) |
| { |
| struct tda826x_priv *priv = fe->tuner_priv; |
| int ret; |
| u8 buf [] = { 0x00, 0x8d }; |
| struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 2 }; |
| |
| if (!priv->has_loopthrough) |
| buf[1] = 0xad; |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) { |
| printk("%s: i2c error\n", __FUNCTION__); |
| } |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| printk("%s:\n", __FUNCTION__); |
| |
| return (ret == 1) ? 0 : ret; |
| } |
| |
| static int tda826x_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) |
| { |
| struct tda826x_priv *priv = fe->tuner_priv; |
| int ret; |
| u32 div; |
| u8 buf [11]; |
| struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 11 }; |
| |
| div = (params->frequency + (1000-1)) / 1000; |
| |
| buf[0] = 0x00; // subaddress |
| buf[1] = 0x09; // powerdown RSSI + the magic value 1 |
| if (!priv->has_loopthrough) |
| buf[1] |= 0x20; // power down loopthrough if not needed |
| buf[2] = (1<<5) | 0x0b; // 1Mhz + 0.45 VCO |
| buf[3] = div >> 7; |
| buf[4] = div << 1; |
| buf[5] = 0xff; // basedband filter to max |
| buf[6] = 0xfe; // gains at max + no RF attenuation |
| buf[7] = 0x83; // charge pumps at high, tests off |
| buf[8] = 0x80; // recommended value 4 for AMPVCO + disable ports. |
| buf[9] = 0x1a; // normal caltime + recommended values for SELTH + SELVTL |
| buf[10] = 0xd4; // recommended value 13 for BBIAS + unknown bit set on |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) { |
| printk("%s: i2c error\n", __FUNCTION__); |
| } |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| priv->frequency = div * 1000; |
| printk("%s:\n", __FUNCTION__); |
| |
| return (ret == 1) ? 0 : ret; |
| } |
| |
| static int tda826x_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
| { |
| struct tda826x_priv *priv = fe->tuner_priv; |
| *frequency = priv->frequency; |
| return 0; |
| } |
| |
| static struct dvb_tuner_ops tda826x_tuner_ops = { |
| .info = { |
| .name = "Philips TDA826X", |
| .frequency_min = 950000, |
| .frequency_min = 2175000 |
| }, |
| .release = tda826x_release, |
| .sleep = tda826x_sleep, |
| .set_params = tda826x_set_params, |
| .get_frequency = tda826x_get_frequency, |
| }; |
| |
| struct dvb_frontend *tda826x_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c, int has_loopthrough) |
| { |
| struct tda826x_priv *priv = NULL; |
| u8 b1 [] = { 0, 0 }; |
| struct i2c_msg msg [] = { { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 } }; |
| int ret; |
| |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| ret = i2c_transfer (i2c, msg, 1); |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| |
| if (ret != 2) |
| return NULL; |
| if (!(b1[1] & 0x80)) |
| return NULL; |
| |
| priv = kzalloc(sizeof(struct tda826x_priv), GFP_KERNEL); |
| if (priv == NULL) |
| return NULL; |
| |
| priv->i2c_address = addr; |
| priv->i2c = i2c; |
| priv->has_loopthrough = has_loopthrough; |
| |
| memcpy(&fe->ops.tuner_ops, &tda826x_tuner_ops, sizeof(struct dvb_tuner_ops)); |
| |
| fe->tuner_priv = priv; |
| printk("%s:\n", __FUNCTION__); |
| |
| return fe; |
| } |
| EXPORT_SYMBOL(tda826x_attach); |
| |
| MODULE_DESCRIPTION("DVB TDA826x driver"); |
| MODULE_AUTHOR("Andrew de Quincey"); |
| MODULE_LICENSE("GPL"); |