a3f90c75b8
Right now, satellite tuner drivers specify frequencies in kHz, while terrestrial/cable ones specify in Hz. That's confusing for developers. However, the main problem is that universal tuners capable of handling both satellite and non-satelite delivery systems are appearing. We end by needing to hack the drivers in order to support such hybrid tuners. So, convert everything to specify tuner frequencies in Hz. Plese notice that a similar patch is also needed for frontends. Tested-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com> Acked-by: Michael Büsch <m@bues.ch> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
292 lines
7.6 KiB
C
292 lines
7.6 KiB
C
/*
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* Driver for Microtune MT2131 "QAM/8VSB single chip tuner"
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*
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* Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/dvb/frontend.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <media/dvb_frontend.h>
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#include "mt2131.h"
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#include "mt2131_priv.h"
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
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#define dprintk(level,fmt, arg...) if (debug >= level) \
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printk(KERN_INFO "%s: " fmt, "mt2131", ## arg)
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static u8 mt2131_config1[] = {
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0x01,
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0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88,
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0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32,
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0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80,
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0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00
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};
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static u8 mt2131_config2[] = {
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0x10,
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0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04
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};
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static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val)
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{
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struct i2c_msg msg[2] = {
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{ .addr = priv->cfg->i2c_address, .flags = 0,
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.buf = ®, .len = 1 },
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{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
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.buf = val, .len = 1 },
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};
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if (i2c_transfer(priv->i2c, msg, 2) != 2) {
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printk(KERN_WARNING "mt2131 I2C read failed\n");
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return -EREMOTEIO;
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}
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return 0;
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}
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static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val)
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{
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u8 buf[2] = { reg, val };
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struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0,
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.buf = buf, .len = 2 };
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if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
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printk(KERN_WARNING "mt2131 I2C write failed\n");
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return -EREMOTEIO;
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}
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return 0;
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}
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static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len)
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{
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struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
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.flags = 0, .buf = buf, .len = len };
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if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
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printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",
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(int)len);
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return -EREMOTEIO;
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}
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return 0;
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}
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static int mt2131_set_params(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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struct mt2131_priv *priv;
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int ret=0, i;
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u32 freq;
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u8 if_band_center;
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u32 f_lo1, f_lo2;
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u32 div1, num1, div2, num2;
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u8 b[8];
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u8 lockval = 0;
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priv = fe->tuner_priv;
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freq = c->frequency / 1000; /* Hz -> kHz */
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dprintk(1, "%s() freq=%d\n", __func__, freq);
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f_lo1 = freq + MT2131_IF1 * 1000;
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f_lo1 = (f_lo1 / 250) * 250;
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f_lo2 = f_lo1 - freq - MT2131_IF2;
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priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000;
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/* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */
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num1 = f_lo1 * 64 / (MT2131_FREF / 128);
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div1 = num1 / 8192;
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num1 &= 0x1fff;
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/* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */
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num2 = f_lo2 * 64 / (MT2131_FREF / 128);
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div2 = num2 / 8192;
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num2 &= 0x1fff;
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if (freq <= 82500) if_band_center = 0x00; else
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if (freq <= 137500) if_band_center = 0x01; else
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if (freq <= 192500) if_band_center = 0x02; else
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if (freq <= 247500) if_band_center = 0x03; else
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if (freq <= 302500) if_band_center = 0x04; else
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if (freq <= 357500) if_band_center = 0x05; else
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if (freq <= 412500) if_band_center = 0x06; else
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if (freq <= 467500) if_band_center = 0x07; else
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if (freq <= 522500) if_band_center = 0x08; else
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if (freq <= 577500) if_band_center = 0x09; else
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if (freq <= 632500) if_band_center = 0x0A; else
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if (freq <= 687500) if_band_center = 0x0B; else
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if (freq <= 742500) if_band_center = 0x0C; else
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if (freq <= 797500) if_band_center = 0x0D; else
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if (freq <= 852500) if_band_center = 0x0E; else
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if (freq <= 907500) if_band_center = 0x0F; else
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if (freq <= 962500) if_band_center = 0x10; else
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if (freq <= 1017500) if_band_center = 0x11; else
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if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13;
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b[0] = 1;
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b[1] = (num1 >> 5) & 0xFF;
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b[2] = (num1 & 0x1F);
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b[3] = div1;
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b[4] = (num2 >> 5) & 0xFF;
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b[5] = num2 & 0x1F;
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b[6] = div2;
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dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2);
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dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center);
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dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2);
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dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n",
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(int)div1, (int)num1, (int)div2, (int)num2);
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dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n",
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(int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5],
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(int)b[6]);
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ret = mt2131_writeregs(priv,b,7);
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if (ret < 0)
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return ret;
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mt2131_writereg(priv, 0x0b, if_band_center);
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/* Wait for lock */
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i = 0;
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do {
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mt2131_readreg(priv, 0x08, &lockval);
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if ((lockval & 0x88) == 0x88)
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break;
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msleep(4);
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i++;
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} while (i < 10);
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return ret;
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}
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static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct mt2131_priv *priv = fe->tuner_priv;
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dprintk(1, "%s()\n", __func__);
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*frequency = priv->frequency;
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return 0;
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}
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static int mt2131_get_status(struct dvb_frontend *fe, u32 *status)
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{
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struct mt2131_priv *priv = fe->tuner_priv;
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u8 lock_status = 0;
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u8 afc_status = 0;
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*status = 0;
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mt2131_readreg(priv, 0x08, &lock_status);
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if ((lock_status & 0x88) == 0x88)
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*status = TUNER_STATUS_LOCKED;
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mt2131_readreg(priv, 0x09, &afc_status);
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dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n",
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__func__, lock_status, afc_status);
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return 0;
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}
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static int mt2131_init(struct dvb_frontend *fe)
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{
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struct mt2131_priv *priv = fe->tuner_priv;
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int ret;
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dprintk(1, "%s()\n", __func__);
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if ((ret = mt2131_writeregs(priv, mt2131_config1,
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sizeof(mt2131_config1))) < 0)
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return ret;
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mt2131_writereg(priv, 0x0b, 0x09);
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mt2131_writereg(priv, 0x15, 0x47);
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mt2131_writereg(priv, 0x07, 0xf2);
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mt2131_writereg(priv, 0x0b, 0x01);
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if ((ret = mt2131_writeregs(priv, mt2131_config2,
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sizeof(mt2131_config2))) < 0)
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return ret;
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return ret;
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}
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static void mt2131_release(struct dvb_frontend *fe)
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{
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dprintk(1, "%s()\n", __func__);
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kfree(fe->tuner_priv);
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fe->tuner_priv = NULL;
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}
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static const struct dvb_tuner_ops mt2131_tuner_ops = {
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.info = {
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.name = "Microtune MT2131",
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.frequency_min_hz = 48 * MHz,
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.frequency_max_hz = 860 * MHz,
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.frequency_step_hz = 50 * kHz,
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},
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.release = mt2131_release,
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.init = mt2131_init,
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.set_params = mt2131_set_params,
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.get_frequency = mt2131_get_frequency,
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.get_status = mt2131_get_status
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};
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struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c,
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struct mt2131_config *cfg, u16 if1)
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{
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struct mt2131_priv *priv = NULL;
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u8 id = 0;
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dprintk(1, "%s()\n", __func__);
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priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL);
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if (priv == NULL)
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return NULL;
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priv->cfg = cfg;
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priv->i2c = i2c;
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if (mt2131_readreg(priv, 0, &id) != 0) {
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kfree(priv);
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return NULL;
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}
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if ( (id != 0x3E) && (id != 0x3F) ) {
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printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n",
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cfg->i2c_address);
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kfree(priv);
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return NULL;
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}
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printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n",
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cfg->i2c_address);
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memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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fe->tuner_priv = priv;
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return fe;
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}
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EXPORT_SYMBOL(mt2131_attach);
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MODULE_AUTHOR("Steven Toth");
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MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver");
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MODULE_LICENSE("GPL");
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