/* * Driver for Microtune MT2131 "QAM/8VSB single chip tuner" * * Copyright (c) 2006 Steven Toth * * 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 #include #include #include #include #include "dvb_frontend.h" #include "mt2131.h" #include "mt2131_priv.h" static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); #define dprintk(level,fmt, arg...) if (debug >= level) \ printk(KERN_INFO "%s: " fmt, "mt2131", ## arg) static u8 mt2131_config1[] = { 0x01, 0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88, 0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32, 0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80, 0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00 }; static u8 mt2131_config2[] = { 0x10, 0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04 }; static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val) { struct i2c_msg msg[2] = { { .addr = priv->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 }, { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val, .len = 1 }, }; if (i2c_transfer(priv->i2c, msg, 2) != 2) { printk(KERN_WARNING "mt2131 I2C read failed\n"); return -EREMOTEIO; } return 0; } static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val) { u8 buf[2] = { reg, val }; struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2 }; if (i2c_transfer(priv->i2c, &msg, 1) != 1) { printk(KERN_WARNING "mt2131 I2C write failed\n"); return -EREMOTEIO; } return 0; } static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len) { struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len }; if (i2c_transfer(priv->i2c, &msg, 1) != 1) { printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n", (int)len); return -EREMOTEIO; } return 0; } static int mt2131_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) { struct mt2131_priv *priv; int ret=0, i; u32 freq; u8 if_band_center; u32 f_lo1, f_lo2; u32 div1, num1, div2, num2; u8 b[8]; u8 lockval = 0; priv = fe->tuner_priv; if (fe->ops.info.type == FE_OFDM) priv->bandwidth = params->u.ofdm.bandwidth; else priv->bandwidth = 0; freq = params->frequency / 1000; // Hz -> kHz dprintk(1, "%s() freq=%d\n", __func__, freq); f_lo1 = freq + MT2131_IF1 * 1000; f_lo1 = (f_lo1 / 250) * 250; f_lo2 = f_lo1 - freq - MT2131_IF2; priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000; /* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */ num1 = f_lo1 * 64 / (MT2131_FREF / 128); div1 = num1 / 8192; num1 &= 0x1fff; /* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */ num2 = f_lo2 * 64 / (MT2131_FREF / 128); div2 = num2 / 8192; num2 &= 0x1fff; if (freq <= 82500) if_band_center = 0x00; else if (freq <= 137500) if_band_center = 0x01; else if (freq <= 192500) if_band_center = 0x02; else if (freq <= 247500) if_band_center = 0x03; else if (freq <= 302500) if_band_center = 0x04; else if (freq <= 357500) if_band_center = 0x05; else if (freq <= 412500) if_band_center = 0x06; else if (freq <= 467500) if_band_center = 0x07; else if (freq <= 522500) if_band_center = 0x08; else if (freq <= 577500) if_band_center = 0x09; else if (freq <= 632500) if_band_center = 0x0A; else if (freq <= 687500) if_band_center = 0x0B; else if (freq <= 742500) if_band_center = 0x0C; else if (freq <= 797500) if_band_center = 0x0D; else if (freq <= 852500) if_band_center = 0x0E; else if (freq <= 907500) if_band_center = 0x0F; else if (freq <= 962500) if_band_center = 0x10; else if (freq <= 1017500) if_band_center = 0x11; else if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13; b[0] = 1; b[1] = (num1 >> 5) & 0xFF; b[2] = (num1 & 0x1F); b[3] = div1; b[4] = (num2 >> 5) & 0xFF; b[5] = num2 & 0x1F; b[6] = div2; dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2); dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center); dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2); dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n", (int)div1, (int)num1, (int)div2, (int)num2); dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n", (int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5], (int)b[6]); ret = mt2131_writeregs(priv,b,7); if (ret < 0) return ret; mt2131_writereg(priv, 0x0b, if_band_center); /* Wait for lock */ i = 0; do { mt2131_readreg(priv, 0x08, &lockval); if ((lockval & 0x88) == 0x88) break; msleep(4); i++; } while (i < 10); return ret; } static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency) { struct mt2131_priv *priv = fe->tuner_priv; dprintk(1, "%s()\n", __func__); *frequency = priv->frequency; return 0; } static int mt2131_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) { struct mt2131_priv *priv = fe->tuner_priv; dprintk(1, "%s()\n", __func__); *bandwidth = priv->bandwidth; return 0; } static int mt2131_get_status(struct dvb_frontend *fe, u32 *status) { struct mt2131_priv *priv = fe->tuner_priv; u8 lock_status = 0; u8 afc_status = 0; *status = 0; mt2131_readreg(priv, 0x08, &lock_status); if ((lock_status & 0x88) == 0x88) *status = TUNER_STATUS_LOCKED; mt2131_readreg(priv, 0x09, &afc_status); dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n", __func__, lock_status, afc_status); return 0; } static int mt2131_init(struct dvb_frontend *fe) { struct mt2131_priv *priv = fe->tuner_priv; int ret; dprintk(1, "%s()\n", __func__); if ((ret = mt2131_writeregs(priv, mt2131_config1, sizeof(mt2131_config1))) < 0) return ret; mt2131_writereg(priv, 0x0b, 0x09); mt2131_writereg(priv, 0x15, 0x47); mt2131_writereg(priv, 0x07, 0xf2); mt2131_writereg(priv, 0x0b, 0x01); if ((ret = mt2131_writeregs(priv, mt2131_config2, sizeof(mt2131_config2))) < 0) return ret; return ret; } static int mt2131_release(struct dvb_frontend *fe) { dprintk(1, "%s()\n", __func__); kfree(fe->tuner_priv); fe->tuner_priv = NULL; return 0; } static const struct dvb_tuner_ops mt2131_tuner_ops = { .info = { .name = "Microtune MT2131", .frequency_min = 48000000, .frequency_max = 860000000, .frequency_step = 50000, }, .release = mt2131_release, .init = mt2131_init, .set_params = mt2131_set_params, .get_frequency = mt2131_get_frequency, .get_bandwidth = mt2131_get_bandwidth, .get_status = mt2131_get_status }; struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2131_config *cfg, u16 if1) { struct mt2131_priv *priv = NULL; u8 id = 0; dprintk(1, "%s()\n", __func__); priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL); if (priv == NULL) return NULL; priv->cfg = cfg; priv->bandwidth = 6000000; /* 6MHz */ priv->i2c = i2c; if (mt2131_readreg(priv, 0, &id) != 0) { kfree(priv); return NULL; } if ( (id != 0x3E) && (id != 0x3F) ) { printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n", cfg->i2c_address); kfree(priv); return NULL; } printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n", cfg->i2c_address); memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops, sizeof(struct dvb_tuner_ops)); fe->tuner_priv = priv; return fe; } EXPORT_SYMBOL(mt2131_attach); MODULE_AUTHOR("Steven Toth"); MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver"); MODULE_LICENSE("GPL"); /* * Local variables: * c-basic-offset: 8 */