2 Driver for Philips tda8262/tda8263 DVBS Silicon tuners
4 (c) 2006 Andrew de Quincey
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/module.h>
24 #include <linux/dvb/frontend.h>
25 #include <asm/types.h>
30 #define dprintk(args...) \
32 if (debug) printk(KERN_DEBUG "tda826x: " args); \
38 struct i2c_adapter *i2c;
43 static int tda826x_release(struct dvb_frontend *fe)
46 kfree(fe->tuner_priv);
47 fe->tuner_priv = NULL;
51 static int tda826x_sleep(struct dvb_frontend *fe)
53 struct tda826x_priv *priv = fe->tuner_priv;
55 u8 buf [] = { 0x00, 0x8d };
56 struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 2 };
58 dprintk("%s:\n", __FUNCTION__);
60 if (!priv->has_loopthrough)
63 if (fe->ops.i2c_gate_ctrl)
64 fe->ops.i2c_gate_ctrl(fe, 1);
65 if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {
66 dprintk("%s: i2c error\n", __FUNCTION__);
68 if (fe->ops.i2c_gate_ctrl)
69 fe->ops.i2c_gate_ctrl(fe, 0);
71 return (ret == 1) ? 0 : ret;
74 static int tda826x_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
76 struct tda826x_priv *priv = fe->tuner_priv;
80 struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 11 };
82 dprintk("%s:\n", __FUNCTION__);
84 div = (params->frequency + (1000-1)) / 1000;
86 buf[0] = 0x00; // subaddress
87 buf[1] = 0x09; // powerdown RSSI + the magic value 1
88 if (!priv->has_loopthrough)
89 buf[1] |= 0x20; // power down loopthrough if not needed
90 buf[2] = (1<<5) | 0x0b; // 1Mhz + 0.45 VCO
93 buf[5] = 0xff; // basedband filter to max
94 buf[6] = 0xfe; // gains at max + no RF attenuation
95 buf[7] = 0x83; // charge pumps at high, tests off
96 buf[8] = 0x80; // recommended value 4 for AMPVCO + disable ports.
97 buf[9] = 0x1a; // normal caltime + recommended values for SELTH + SELVTL
98 buf[10] = 0xd4; // recommended value 13 for BBIAS + unknown bit set on
100 if (fe->ops.i2c_gate_ctrl)
101 fe->ops.i2c_gate_ctrl(fe, 1);
102 if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {
103 dprintk("%s: i2c error\n", __FUNCTION__);
105 if (fe->ops.i2c_gate_ctrl)
106 fe->ops.i2c_gate_ctrl(fe, 0);
108 priv->frequency = div * 1000;
110 return (ret == 1) ? 0 : ret;
113 static int tda826x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
115 struct tda826x_priv *priv = fe->tuner_priv;
116 *frequency = priv->frequency;
120 static struct dvb_tuner_ops tda826x_tuner_ops = {
122 .name = "Philips TDA826X",
123 .frequency_min = 950000,
124 .frequency_min = 2175000
126 .release = tda826x_release,
127 .sleep = tda826x_sleep,
128 .set_params = tda826x_set_params,
129 .get_frequency = tda826x_get_frequency,
132 struct dvb_frontend *tda826x_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c, int has_loopthrough)
134 struct tda826x_priv *priv = NULL;
136 struct i2c_msg msg [] = { { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 } };
139 dprintk("%s:\n", __FUNCTION__);
141 if (fe->ops.i2c_gate_ctrl)
142 fe->ops.i2c_gate_ctrl(fe, 1);
143 ret = i2c_transfer (i2c, msg, 1);
144 if (fe->ops.i2c_gate_ctrl)
145 fe->ops.i2c_gate_ctrl(fe, 0);
152 priv = kzalloc(sizeof(struct tda826x_priv), GFP_KERNEL);
156 priv->i2c_address = addr;
158 priv->has_loopthrough = has_loopthrough;
160 memcpy(&fe->ops.tuner_ops, &tda826x_tuner_ops, sizeof(struct dvb_tuner_ops));
162 fe->tuner_priv = priv;
166 EXPORT_SYMBOL(tda826x_attach);
168 module_param(debug, int, 0644);
169 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
171 MODULE_DESCRIPTION("DVB TDA826x driver");
172 MODULE_AUTHOR("Andrew de Quincey");
173 MODULE_LICENSE("GPL");