| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Driver for Microtune MT2131 "QAM/8VSB single chip tuner" |
| * |
| * Copyright (c) 2006 Steven Toth <stoth@linuxtv.org> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/dvb/frontend.h> |
| #include <linux/i2c.h> |
| #include <linux/slab.h> |
| |
| #include <media/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 dtv_frontend_properties *c = &fe->dtv_property_cache; |
| 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; |
| |
| freq = c->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_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 void mt2131_release(struct dvb_frontend *fe) |
| { |
| dprintk(1, "%s()\n", __func__); |
| kfree(fe->tuner_priv); |
| fe->tuner_priv = NULL; |
| } |
| |
| static const struct dvb_tuner_ops mt2131_tuner_ops = { |
| .info = { |
| .name = "Microtune MT2131", |
| .frequency_min_hz = 48 * MHz, |
| .frequency_max_hz = 860 * MHz, |
| .frequency_step_hz = 50 * kHz, |
| }, |
| |
| .release = mt2131_release, |
| .init = mt2131_init, |
| |
| .set_params = mt2131_set_params, |
| .get_frequency = mt2131_get_frequency, |
| .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->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_GPL(mt2131_attach); |
| |
| MODULE_AUTHOR("Steven Toth"); |
| MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver"); |
| MODULE_LICENSE("GPL"); |
