diff options
Diffstat (limited to 'drivers/media/dvb/frontends/mt2266.c')
| -rw-r--r-- | drivers/media/dvb/frontends/mt2266.c | 351 |
1 files changed, 0 insertions, 351 deletions
diff --git a/drivers/media/dvb/frontends/mt2266.c b/drivers/media/dvb/frontends/mt2266.c deleted file mode 100644 index 54b18f9..0000000 --- a/drivers/media/dvb/frontends/mt2266.c +++ /dev/null @@ -1,351 +0,0 @@ -/* - * Driver for Microtune MT2266 "Direct conversion low power broadband tuner" - * - * Copyright (c) 2007 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. - */ - -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/dvb/frontend.h> -#include <linux/i2c.h> - -#include "dvb_frontend.h" -#include "mt2266.h" - -#define I2C_ADDRESS 0x60 - -#define REG_PART_REV 0 -#define REG_TUNE 1 -#define REG_BAND 6 -#define REG_BANDWIDTH 8 -#define REG_LOCK 0x12 - -#define PART_REV 0x85 - -struct mt2266_priv { - struct mt2266_config *cfg; - struct i2c_adapter *i2c; - - u32 frequency; - u32 bandwidth; - u8 band; -}; - -#define MT2266_VHF 1 -#define MT2266_UHF 0 - -/* Here, frequencies are expressed in kiloHertz to avoid 32 bits overflows */ - -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 "MT2266: " args); printk("\n"); }} while (0) - -// Reads a single register -static int mt2266_readreg(struct mt2266_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 "MT2266 I2C read failed\n"); - return -EREMOTEIO; - } - return 0; -} - -// Writes a single register -static int mt2266_writereg(struct mt2266_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 "MT2266 I2C write failed\n"); - return -EREMOTEIO; - } - return 0; -} - -// Writes a set of consecutive registers -static int mt2266_writeregs(struct mt2266_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 "MT2266 I2C write failed (len=%i)\n",(int)len); - return -EREMOTEIO; - } - return 0; -} - -// Initialisation sequences -static u8 mt2266_init1[] = { REG_TUNE, 0x00, 0x00, 0x28, - 0x00, 0x52, 0x99, 0x3f }; - -static u8 mt2266_init2[] = { - 0x17, 0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a, 0xd4, - 0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14, - 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff, - 0xff, 0x00, 0x77, 0x0f, 0x2d -}; - -static u8 mt2266_init_8mhz[] = { REG_BANDWIDTH, 0x22, 0x22, 0x22, 0x22, - 0x22, 0x22, 0x22, 0x22 }; - -static u8 mt2266_init_7mhz[] = { REG_BANDWIDTH, 0x32, 0x32, 0x32, 0x32, - 0x32, 0x32, 0x32, 0x32 }; - -static u8 mt2266_init_6mhz[] = { REG_BANDWIDTH, 0xa7, 0xa7, 0xa7, 0xa7, - 0xa7, 0xa7, 0xa7, 0xa7 }; - -static u8 mt2266_uhf[] = { 0x1d, 0xdc, 0x00, 0x0a, 0xd4, 0x03, 0x64, 0x64, - 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14 }; - -static u8 mt2266_vhf[] = { 0x1d, 0xfe, 0x00, 0x00, 0xb4, 0x03, 0xa5, 0xa5, - 0xa5, 0xa5, 0x82, 0xaa, 0xf1, 0x17, 0x80, 0x1f }; - -#define FREF 30000 // Quartz oscillator 30 MHz - -static int mt2266_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) -{ - struct mt2266_priv *priv; - int ret=0; - u32 freq; - u32 tune; - u8 lnaband; - u8 b[10]; - int i; - u8 band; - - priv = fe->tuner_priv; - - freq = params->frequency / 1000; // Hz -> kHz - if (freq < 470000 && freq > 230000) - return -EINVAL; /* Gap between VHF and UHF bands */ - priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0; - priv->frequency = freq * 1000; - - tune = 2 * freq * (8192/16) / (FREF/16); - band = (freq < 300000) ? MT2266_VHF : MT2266_UHF; - if (band == MT2266_VHF) - tune *= 2; - - switch (params->u.ofdm.bandwidth) { - case BANDWIDTH_6_MHZ: - mt2266_writeregs(priv, mt2266_init_6mhz, - sizeof(mt2266_init_6mhz)); - break; - case BANDWIDTH_7_MHZ: - mt2266_writeregs(priv, mt2266_init_7mhz, - sizeof(mt2266_init_7mhz)); - break; - case BANDWIDTH_8_MHZ: - default: - mt2266_writeregs(priv, mt2266_init_8mhz, - sizeof(mt2266_init_8mhz)); - break; - } - - if (band == MT2266_VHF && priv->band == MT2266_UHF) { - dprintk("Switch from UHF to VHF"); - mt2266_writereg(priv, 0x05, 0x04); - mt2266_writereg(priv, 0x19, 0x61); - mt2266_writeregs(priv, mt2266_vhf, sizeof(mt2266_vhf)); - } else if (band == MT2266_UHF && priv->band == MT2266_VHF) { - dprintk("Switch from VHF to UHF"); - mt2266_writereg(priv, 0x05, 0x52); - mt2266_writereg(priv, 0x19, 0x61); - mt2266_writeregs(priv, mt2266_uhf, sizeof(mt2266_uhf)); - } - msleep(10); - - if (freq <= 495000) - lnaband = 0xEE; - else if (freq <= 525000) - lnaband = 0xDD; - else if (freq <= 550000) - lnaband = 0xCC; - else if (freq <= 580000) - lnaband = 0xBB; - else if (freq <= 605000) - lnaband = 0xAA; - else if (freq <= 630000) - lnaband = 0x99; - else if (freq <= 655000) - lnaband = 0x88; - else if (freq <= 685000) - lnaband = 0x77; - else if (freq <= 710000) - lnaband = 0x66; - else if (freq <= 735000) - lnaband = 0x55; - else if (freq <= 765000) - lnaband = 0x44; - else if (freq <= 802000) - lnaband = 0x33; - else if (freq <= 840000) - lnaband = 0x22; - else - lnaband = 0x11; - - b[0] = REG_TUNE; - b[1] = (tune >> 8) & 0x1F; - b[2] = tune & 0xFF; - b[3] = tune >> 13; - mt2266_writeregs(priv,b,4); - - dprintk("set_parms: tune=%d band=%d %s", - (int) tune, (int) lnaband, - (band == MT2266_UHF) ? "UHF" : "VHF"); - dprintk("set_parms: [1..3]: %2x %2x %2x", - (int) b[1], (int) b[2], (int)b[3]); - - if (band == MT2266_UHF) { - b[0] = 0x05; - b[1] = (priv->band == MT2266_VHF) ? 0x52 : 0x62; - b[2] = lnaband; - mt2266_writeregs(priv, b, 3); - } - - /* Wait for pll lock or timeout */ - i = 0; - do { - mt2266_readreg(priv,REG_LOCK,b); - if (b[0] & 0x40) - break; - msleep(10); - i++; - } while (i<10); - dprintk("Lock when i=%i",(int)i); - - if (band == MT2266_UHF && priv->band == MT2266_VHF) - mt2266_writereg(priv, 0x05, 0x62); - - priv->band = band; - - return ret; -} - -static void mt2266_calibrate(struct mt2266_priv *priv) -{ - mt2266_writereg(priv, 0x11, 0x03); - mt2266_writereg(priv, 0x11, 0x01); - mt2266_writeregs(priv, mt2266_init1, sizeof(mt2266_init1)); - mt2266_writeregs(priv, mt2266_init2, sizeof(mt2266_init2)); - mt2266_writereg(priv, 0x33, 0x5e); - mt2266_writereg(priv, 0x10, 0x10); - mt2266_writereg(priv, 0x10, 0x00); - mt2266_writeregs(priv, mt2266_init_8mhz, sizeof(mt2266_init_8mhz)); - msleep(25); - mt2266_writereg(priv, 0x17, 0x6d); - mt2266_writereg(priv, 0x1c, 0x00); - msleep(75); - mt2266_writereg(priv, 0x17, 0x6d); - mt2266_writereg(priv, 0x1c, 0xff); -} - -static int mt2266_get_frequency(struct dvb_frontend *fe, u32 *frequency) -{ - struct mt2266_priv *priv = fe->tuner_priv; - *frequency = priv->frequency; - return 0; -} - -static int mt2266_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) -{ - struct mt2266_priv *priv = fe->tuner_priv; - *bandwidth = priv->bandwidth; - return 0; -} - -static int mt2266_init(struct dvb_frontend *fe) -{ - int ret; - struct mt2266_priv *priv = fe->tuner_priv; - ret = mt2266_writereg(priv, 0x17, 0x6d); - if (ret < 0) - return ret; - ret = mt2266_writereg(priv, 0x1c, 0xff); - if (ret < 0) - return ret; - return 0; -} - -static int mt2266_sleep(struct dvb_frontend *fe) -{ - struct mt2266_priv *priv = fe->tuner_priv; - mt2266_writereg(priv, 0x17, 0x6d); - mt2266_writereg(priv, 0x1c, 0x00); - return 0; -} - -static int mt2266_release(struct dvb_frontend *fe) -{ - kfree(fe->tuner_priv); - fe->tuner_priv = NULL; - return 0; -} - -static const struct dvb_tuner_ops mt2266_tuner_ops = { - .info = { - .name = "Microtune MT2266", - .frequency_min = 174000000, - .frequency_max = 862000000, - .frequency_step = 50000, - }, - .release = mt2266_release, - .init = mt2266_init, - .sleep = mt2266_sleep, - .set_params = mt2266_set_params, - .get_frequency = mt2266_get_frequency, - .get_bandwidth = mt2266_get_bandwidth -}; - -struct dvb_frontend * mt2266_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2266_config *cfg) -{ - struct mt2266_priv *priv = NULL; - u8 id = 0; - - priv = kzalloc(sizeof(struct mt2266_priv), GFP_KERNEL); - if (priv == NULL) - return NULL; - - priv->cfg = cfg; - priv->i2c = i2c; - priv->band = MT2266_UHF; - - if (mt2266_readreg(priv, 0, &id)) { - kfree(priv); - return NULL; - } - if (id != PART_REV) { - kfree(priv); - return NULL; - } - printk(KERN_INFO "MT2266: successfully identified\n"); - memcpy(&fe->ops.tuner_ops, &mt2266_tuner_ops, sizeof(struct dvb_tuner_ops)); - - fe->tuner_priv = priv; - mt2266_calibrate(priv); - return fe; -} -EXPORT_SYMBOL(mt2266_attach); - -MODULE_AUTHOR("Olivier DANET"); -MODULE_DESCRIPTION("Microtune MT2266 silicon tuner driver"); -MODULE_LICENSE("GPL"); |