2 * Driver for Microtune MT2131 "QAM/8VSB single chip tuner"
4 * Copyright (c) 2006 Steven Toth <stoth@hauppauge.com>
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.
22 #include <linux/module.h>
23 #include <linux/moduleparam.h>
24 #include <linux/delay.h>
25 #include <linux/dvb/frontend.h>
26 #include <linux/i2c.h>
28 #include "dvb_frontend.h"
31 #include "mt2131_priv.h"
34 module_param(debug, int, 0644);
35 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
37 #define dprintk(level,fmt, arg...) if (debug >= level) \
38 printk(KERN_INFO "%s: " fmt, "mt2131", ## arg)
40 static u8 mt2131_config1[] = {
42 0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88,
43 0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32,
44 0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80,
45 0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00
48 static u8 mt2131_config2[] = {
50 0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04
53 static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val)
55 struct i2c_msg msg[2] = {
56 { .addr = priv->cfg->i2c_address, .flags = 0,
57 .buf = ®, .len = 1 },
58 { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
59 .buf = val, .len = 1 },
62 if (i2c_transfer(priv->i2c, msg, 2) != 2) {
63 printk(KERN_WARNING "mt2131 I2C read failed\n");
69 static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val)
71 u8 buf[2] = { reg, val };
72 struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0,
73 .buf = buf, .len = 2 };
75 if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
76 printk(KERN_WARNING "mt2131 I2C write failed\n");
82 static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len)
84 struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
85 .flags = 0, .buf = buf, .len = len };
87 if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
88 printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",
95 static int mt2131_set_gpo(struct dvb_frontend *fe, u8 val)
97 struct mt2131_priv *priv = fe->tuner_priv;
100 mt2131_readreg(priv, 0x07, &v);
101 mt2131_writereg(priv, 0x07, (v & 0xfe) | (val & 0x01));
106 static int mt2131_set_params(struct dvb_frontend *fe,
107 struct dvb_frontend_parameters *params)
109 struct mt2131_priv *priv;
114 u32 div1, num1, div2, num2;
118 priv = fe->tuner_priv;
119 if (fe->ops.info.type == FE_OFDM)
120 priv->bandwidth = params->u.ofdm.bandwidth;
124 freq = params->frequency / 1000; // Hz -> kHz
125 dprintk(1, "%s() freq=%d\n", __FUNCTION__, freq);
127 f_lo1 = freq + MT2131_IF1 * 1000;
128 f_lo1 = (f_lo1 / 250) * 250;
129 f_lo2 = f_lo1 - freq - MT2131_IF2;
131 priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000,
133 /* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */
134 num1 = f_lo1 * 64 / (MT2131_FREF / 128);
138 /* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */
139 num2 = f_lo2 * 64 / (MT2131_FREF / 128);
143 if (freq <= 82500) if_band_center = 0x00; else
144 if (freq <= 137500) if_band_center = 0x01; else
145 if (freq <= 192500) if_band_center = 0x02; else
146 if (freq <= 247500) if_band_center = 0x03; else
147 if (freq <= 302500) if_band_center = 0x04; else
148 if (freq <= 357500) if_band_center = 0x05; else
149 if (freq <= 412500) if_band_center = 0x06; else
150 if (freq <= 467500) if_band_center = 0x07; else
151 if (freq <= 522500) if_band_center = 0x08; else
152 if (freq <= 577500) if_band_center = 0x09; else
153 if (freq <= 632500) if_band_center = 0x0A; else
154 if (freq <= 687500) if_band_center = 0x0B; else
155 if (freq <= 742500) if_band_center = 0x0C; else
156 if (freq <= 797500) if_band_center = 0x0D; else
157 if (freq <= 852500) if_band_center = 0x0E; else
158 if (freq <= 907500) if_band_center = 0x0F; else
159 if (freq <= 962500) if_band_center = 0x10; else
160 if (freq <= 1017500) if_band_center = 0x11; else
161 if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13;
164 b[1] = (num1 >> 5) & 0xFF;
165 b[2] = (num1 & 0x1F);
167 b[4] = (num2 >> 5) & 0xFF;
171 dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2);
172 dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center);
173 dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2);
174 dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n",
175 (int)div1, (int)num1, (int)div2, (int)num2);
176 dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n",
177 (int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5],
180 ret = mt2131_writeregs(priv,b,7);
184 mt2131_writereg(priv, 0x0b, if_band_center);
189 mt2131_readreg(priv, 0x08, &lockval);
190 if ((lockval & 0x88) == 0x88)
199 static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency)
201 struct mt2131_priv *priv = fe->tuner_priv;
202 dprintk(1, "%s()\n", __FUNCTION__);
203 *frequency = priv->frequency;
207 static int mt2131_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
209 struct mt2131_priv *priv = fe->tuner_priv;
210 dprintk(1, "%s()\n", __FUNCTION__);
211 *bandwidth = priv->bandwidth;
215 static int mt2131_get_status(struct dvb_frontend *fe, u32 *status)
217 struct mt2131_priv *priv = fe->tuner_priv;
223 mt2131_readreg(priv, 0x08, &lock_status);
224 if ((lock_status & 0x88) == 0x88)
225 *status = TUNER_STATUS_LOCKED;
227 mt2131_readreg(priv, 0x09, &afc_status);
228 dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n",
229 __FUNCTION__, lock_status, afc_status);
234 static int mt2131_init(struct dvb_frontend *fe)
236 struct mt2131_priv *priv = fe->tuner_priv;
238 dprintk(1, "%s()\n", __FUNCTION__);
240 if ((ret = mt2131_writeregs(priv, mt2131_config1,
241 sizeof(mt2131_config1))) < 0)
244 mt2131_writereg(priv, 0x0b, 0x09);
245 mt2131_writereg(priv, 0x15, 0x47);
246 mt2131_writereg(priv, 0x07, 0xf2);
247 mt2131_writereg(priv, 0x0b, 0x01);
249 if ((ret = mt2131_writeregs(priv, mt2131_config2,
250 sizeof(mt2131_config2))) < 0)
256 static int mt2131_release(struct dvb_frontend *fe)
258 dprintk(1, "%s()\n", __FUNCTION__);
259 kfree(fe->tuner_priv);
260 fe->tuner_priv = NULL;
264 static const struct dvb_tuner_ops mt2131_tuner_ops = {
266 .name = "Microtune MT2131",
267 .frequency_min = 48000000,
268 .frequency_max = 860000000,
269 .frequency_step = 50000,
272 .release = mt2131_release,
275 .set_params = mt2131_set_params,
276 .get_frequency = mt2131_get_frequency,
277 .get_bandwidth = mt2131_get_bandwidth,
278 .get_status = mt2131_get_status
281 struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe,
282 struct i2c_adapter *i2c,
283 struct mt2131_config *cfg, u16 if1)
285 struct mt2131_priv *priv = NULL;
288 dprintk(1, "%s()\n", __FUNCTION__);
290 priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL);
295 priv->bandwidth = 6000000; /* 6MHz */
298 if (mt2131_readreg(priv, 0, &id) != 0) {
302 if ( (id != 0x3E) && (id != 0x3F) ) {
303 printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n",
309 printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n",
311 memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops,
312 sizeof(struct dvb_tuner_ops));
314 fe->tuner_priv = priv;
317 EXPORT_SYMBOL(mt2131_attach);
319 MODULE_AUTHOR("Steven Toth");
320 MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver");
321 MODULE_LICENSE("GPL");