diff options
Diffstat (limited to 'drivers/media/dvb/frontends/mt2060.c')
| -rw-r--r-- | drivers/media/dvb/frontends/mt2060.c | 369 |
1 files changed, 0 insertions, 369 deletions
diff --git a/drivers/media/dvb/frontends/mt2060.c b/drivers/media/dvb/frontends/mt2060.c deleted file mode 100644 index 1305b0e63ce5..000000000000 --- a/drivers/media/dvb/frontends/mt2060.c +++ /dev/null @@ -1,369 +0,0 @@ -/* - * Driver for Microtune MT2060 "Single chip dual conversion broadband tuner" - * - * Copyright (c) 2006 Olivier DANET <odanet@caramail.com> - * - * 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.= - */ - -/* In that file, frequencies are expressed in kiloHertz to avoid 32 bits overflows */ - -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/dvb/frontend.h> -#include <linux/i2c.h> - -#include "dvb_frontend.h" - -#include "mt2060.h" -#include "mt2060_priv.h" - -static int debug; -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); - -#define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2060: " args); printk("\n"); }} while (0) - -// Reads a single register -static int mt2060_readreg(struct mt2060_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 "mt2060 I2C read failed\n"); - return -EREMOTEIO; - } - return 0; -} - -// Writes a single register -static int mt2060_writereg(struct mt2060_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 "mt2060 I2C write failed\n"); - return -EREMOTEIO; - } - return 0; -} - -// Writes a set of consecutive registers -static int mt2060_writeregs(struct mt2060_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 "mt2060 I2C write failed (len=%i)\n",(int)len); - return -EREMOTEIO; - } - return 0; -} - -// Initialisation sequences -// LNABAND=3, NUM1=0x3C, DIV1=0x74, NUM2=0x1080, DIV2=0x49 -static u8 mt2060_config1[] = { - REG_LO1C1, - 0x3F, 0x74, 0x00, 0x08, 0x93 -}; - -// FMCG=2, GP2=0, GP1=0 -static u8 mt2060_config2[] = { - REG_MISC_CTRL, - 0x20, 0x1E, 0x30, 0xff, 0x80, 0xff, 0x00, 0x2c, 0x42 -}; - -// VGAG=3, V1CSE=1 - -#ifdef MT2060_SPURCHECK -/* The function below calculates the frequency offset between the output frequency if2 - and the closer cross modulation subcarrier between lo1 and lo2 up to the tenth harmonic */ -static int mt2060_spurcalc(u32 lo1,u32 lo2,u32 if2) -{ - int I,J; - int dia,diamin,diff; - diamin=1000000; - for (I = 1; I < 10; I++) { - J = ((2*I*lo1)/lo2+1)/2; - diff = I*(int)lo1-J*(int)lo2; - if (diff < 0) diff=-diff; - dia = (diff-(int)if2); - if (dia < 0) dia=-dia; - if (diamin > dia) diamin=dia; - } - return diamin; -} - -#define BANDWIDTH 4000 // kHz - -/* Calculates the frequency offset to add to avoid spurs. Returns 0 if no offset is needed */ -static int mt2060_spurcheck(u32 lo1,u32 lo2,u32 if2) -{ - u32 Spur,Sp1,Sp2; - int I,J; - I=0; - J=1000; - - Spur=mt2060_spurcalc(lo1,lo2,if2); - if (Spur < BANDWIDTH) { - /* Potential spurs detected */ - dprintk("Spurs before : f_lo1: %d f_lo2: %d (kHz)", - (int)lo1,(int)lo2); - I=1000; - Sp1 = mt2060_spurcalc(lo1+I,lo2+I,if2); - Sp2 = mt2060_spurcalc(lo1-I,lo2-I,if2); - - if (Sp1 < Sp2) { - J=-J; I=-I; Spur=Sp2; - } else - Spur=Sp1; - - while (Spur < BANDWIDTH) { - I += J; - Spur = mt2060_spurcalc(lo1+I,lo2+I,if2); - } - dprintk("Spurs after : f_lo1: %d f_lo2: %d (kHz)", - (int)(lo1+I),(int)(lo2+I)); - } - return I; -} -#endif - -#define IF2 36150 // IF2 frequency = 36.150 MHz -#define FREF 16000 // Quartz oscillator 16 MHz - -static int mt2060_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) -{ - struct mt2060_priv *priv; - int ret=0; - int i=0; - u32 freq; - u8 lnaband; - u32 f_lo1,f_lo2; - u32 div1,num1,div2,num2; - u8 b[8]; - u32 if1; - - priv = fe->tuner_priv; - - if1 = priv->if1_freq; - b[0] = REG_LO1B1; - b[1] = 0xFF; - - mt2060_writeregs(priv,b,2); - - freq = params->frequency / 1000; // Hz -> kHz - priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0; - - f_lo1 = freq + if1 * 1000; - f_lo1 = (f_lo1 / 250) * 250; - f_lo2 = f_lo1 - freq - IF2; - // From the Comtech datasheet, the step used is 50kHz. The tuner chip could be more precise - f_lo2 = ((f_lo2 + 25) / 50) * 50; - priv->frequency = (f_lo1 - f_lo2 - IF2) * 1000, - -#ifdef MT2060_SPURCHECK - // LO-related spurs detection and correction - num1 = mt2060_spurcheck(f_lo1,f_lo2,IF2); - f_lo1 += num1; - f_lo2 += num1; -#endif - //Frequency LO1 = 16MHz * (DIV1 + NUM1/64 ) - num1 = f_lo1 / (FREF / 64); - div1 = num1 / 64; - num1 &= 0x3f; - - // Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) - num2 = f_lo2 * 64 / (FREF / 128); - div2 = num2 / 8192; - num2 &= 0x1fff; - - if (freq <= 95000) lnaband = 0xB0; else - if (freq <= 180000) lnaband = 0xA0; else - if (freq <= 260000) lnaband = 0x90; else - if (freq <= 335000) lnaband = 0x80; else - if (freq <= 425000) lnaband = 0x70; else - if (freq <= 480000) lnaband = 0x60; else - if (freq <= 570000) lnaband = 0x50; else - if (freq <= 645000) lnaband = 0x40; else - if (freq <= 730000) lnaband = 0x30; else - if (freq <= 810000) lnaband = 0x20; else lnaband = 0x10; - - b[0] = REG_LO1C1; - b[1] = lnaband | ((num1 >>2) & 0x0F); - b[2] = div1; - b[3] = (num2 & 0x0F) | ((num1 & 3) << 4); - b[4] = num2 >> 4; - b[5] = ((num2 >>12) & 1) | (div2 << 1); - - dprintk("IF1: %dMHz",(int)if1); - dprintk("PLL freq=%dkHz f_lo1=%dkHz f_lo2=%dkHz",(int)freq,(int)f_lo1,(int)f_lo2); - dprintk("PLL div1=%d num1=%d div2=%d num2=%d",(int)div1,(int)num1,(int)div2,(int)num2); - dprintk("PLL [1..5]: %2x %2x %2x %2x %2x",(int)b[1],(int)b[2],(int)b[3],(int)b[4],(int)b[5]); - - mt2060_writeregs(priv,b,6); - - //Waits for pll lock or timeout - i = 0; - do { - mt2060_readreg(priv,REG_LO_STATUS,b); - if ((b[0] & 0x88)==0x88) - break; - msleep(4); - i++; - } while (i<10); - - return ret; -} - -static void mt2060_calibrate(struct mt2060_priv *priv) -{ - u8 b = 0; - int i = 0; - - if (mt2060_writeregs(priv,mt2060_config1,sizeof(mt2060_config1))) - return; - if (mt2060_writeregs(priv,mt2060_config2,sizeof(mt2060_config2))) - return; - - /* initialize the clock output */ - mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x30); - - do { - b |= (1 << 6); // FM1SS; - mt2060_writereg(priv, REG_LO2C1,b); - msleep(20); - - if (i == 0) { - b |= (1 << 7); // FM1CA; - mt2060_writereg(priv, REG_LO2C1,b); - b &= ~(1 << 7); // FM1CA; - msleep(20); - } - - b &= ~(1 << 6); // FM1SS - mt2060_writereg(priv, REG_LO2C1,b); - - msleep(20); - i++; - } while (i < 9); - - i = 0; - while (i++ < 10 && mt2060_readreg(priv, REG_MISC_STAT, &b) == 0 && (b & (1 << 6)) == 0) - msleep(20); - - if (i < 10) { - mt2060_readreg(priv, REG_FM_FREQ, &priv->fmfreq); // now find out, what is fmreq used for :) - dprintk("calibration was successful: %d", (int)priv->fmfreq); - } else - dprintk("FMCAL timed out"); -} - -static int mt2060_get_frequency(struct dvb_frontend *fe, u32 *frequency) -{ - struct mt2060_priv *priv = fe->tuner_priv; - *frequency = priv->frequency; - return 0; -} - -static int mt2060_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) -{ - struct mt2060_priv *priv = fe->tuner_priv; - *bandwidth = priv->bandwidth; - return 0; -} - -static int mt2060_init(struct dvb_frontend *fe) -{ - struct mt2060_priv *priv = fe->tuner_priv; - return mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x33); -} - -static int mt2060_sleep(struct dvb_frontend *fe) -{ - struct mt2060_priv *priv = fe->tuner_priv; - return mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x30); -} - -static int mt2060_release(struct dvb_frontend *fe) -{ - kfree(fe->tuner_priv); - fe->tuner_priv = NULL; - return 0; -} - -static const struct dvb_tuner_ops mt2060_tuner_ops = { - .info = { - .name = "Microtune MT2060", - .frequency_min = 48000000, - .frequency_max = 860000000, - .frequency_step = 50000, - }, - - .release = mt2060_release, - - .init = mt2060_init, - .sleep = mt2060_sleep, - - .set_params = mt2060_set_params, - .get_frequency = mt2060_get_frequency, - .get_bandwidth = mt2060_get_bandwidth -}; - -/* This functions tries to identify a MT2060 tuner by reading the PART/REV register. This is hasty. */ -struct dvb_frontend * mt2060_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2060_config *cfg, u16 if1) -{ - struct mt2060_priv *priv = NULL; - u8 id = 0; - - priv = kzalloc(sizeof(struct mt2060_priv), GFP_KERNEL); - if (priv == NULL) - return NULL; - - priv->cfg = cfg; - priv->i2c = i2c; - priv->if1_freq = if1; - - if (mt2060_readreg(priv,REG_PART_REV,&id) != 0) { - kfree(priv); - return NULL; - } - - if (id != PART_REV) { - kfree(priv); - return NULL; - } - printk(KERN_INFO "MT2060: successfully identified (IF1 = %d)\n", if1); - memcpy(&fe->ops.tuner_ops, &mt2060_tuner_ops, sizeof(struct dvb_tuner_ops)); - - fe->tuner_priv = priv; - - mt2060_calibrate(priv); - - return fe; -} -EXPORT_SYMBOL(mt2060_attach); - -MODULE_AUTHOR("Olivier DANET"); -MODULE_DESCRIPTION("Microtune MT2060 silicon tuner driver"); -MODULE_LICENSE("GPL"); |