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marcus.erl |
/*
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* For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
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* I2C address is allways 0xC0.
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*
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*
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* Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@infradead.org)
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* This code is placed under the terms of the GNU General Public License
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*
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* tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa
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* from their contributions on DScaler.
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*/
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#include <linux/i2c.h>
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#include <linux/delay.h>
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#include <linux/videodev.h>
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#include "tuner-i2c.h"
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#include "tea5767.h"
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static int debug = 0;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "enable verbose debug messages");
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#define PREFIX "tea5767 "
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struct tea5767_priv {
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struct tuner_i2c_props i2c_props;
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u32 frequency;
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};
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/*****************************************************************************/
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/******************************
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* Write mode register values *
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******************************/
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/* First register */
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#define TEA5767_MUTE 0x80 /* Mutes output */
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#define TEA5767_SEARCH 0x40 /* Activates station search */
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/* Bits 0-5 for divider MSB */
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/* Second register */
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/* Bits 0-7 for divider LSB */
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/* Third register */
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/* Station search from botton to up */
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#define TEA5767_SEARCH_UP 0x80
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/* Searches with ADC output = 10 */
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#define TEA5767_SRCH_HIGH_LVL 0x60
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/* Searches with ADC output = 10 */
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#define TEA5767_SRCH_MID_LVL 0x40
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/* Searches with ADC output = 5 */
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#define TEA5767_SRCH_LOW_LVL 0x20
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/* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */
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#define TEA5767_HIGH_LO_INJECT 0x10
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/* Disable stereo */
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#define TEA5767_MONO 0x08
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/* Disable right channel and turns to mono */
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#define TEA5767_MUTE_RIGHT 0x04
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/* Disable left channel and turns to mono */
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#define TEA5767_MUTE_LEFT 0x02
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#define TEA5767_PORT1_HIGH 0x01
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/* Fourth register */
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#define TEA5767_PORT2_HIGH 0x80
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/* Chips stops working. Only I2C bus remains on */
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#define TEA5767_STDBY 0x40
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/* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */
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#define TEA5767_JAPAN_BAND 0x20
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/* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */
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#define TEA5767_XTAL_32768 0x10
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/* Cuts weak signals */
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#define TEA5767_SOFT_MUTE 0x08
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/* Activates high cut control */
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#define TEA5767_HIGH_CUT_CTRL 0x04
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/* Activates stereo noise control */
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#define TEA5767_ST_NOISE_CTL 0x02
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/* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */
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#define TEA5767_SRCH_IND 0x01
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/* Fifth register */
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/* By activating, it will use Xtal at 13 MHz as reference for divider */
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#define TEA5767_PLLREF_ENABLE 0x80
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/* By activating, deemphasis=50, or else, deemphasis of 50us */
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#define TEA5767_DEEMPH_75 0X40
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/*****************************
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* Read mode register values *
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*****************************/
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/* First register */
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#define TEA5767_READY_FLAG_MASK 0x80
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#define TEA5767_BAND_LIMIT_MASK 0X40
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/* Bits 0-5 for divider MSB after search or preset */
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/* Second register */
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/* Bits 0-7 for divider LSB after search or preset */
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/* Third register */
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#define TEA5767_STEREO_MASK 0x80
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#define TEA5767_IF_CNTR_MASK 0x7f
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/* Fourth register */
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#define TEA5767_ADC_LEVEL_MASK 0xf0
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/* should be 0 */
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#define TEA5767_CHIP_ID_MASK 0x0f
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/* Fifth register */
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/* Reserved for future extensions */
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#define TEA5767_RESERVED_MASK 0xff
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enum tea5767_xtal_freq {
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TEA5767_LOW_LO_32768 = 0,
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TEA5767_HIGH_LO_32768 = 1,
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TEA5767_LOW_LO_13MHz = 2,
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TEA5767_HIGH_LO_13MHz = 3,
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};
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/*****************************************************************************/
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static void tea5767_status_dump(unsigned char *buffer)
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{
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unsigned int div, frq;
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if (TEA5767_READY_FLAG_MASK & buffer[0])
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printk(PREFIX "Ready Flag ON\n");
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else
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printk(PREFIX "Ready Flag OFF\n");
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if (TEA5767_BAND_LIMIT_MASK & buffer[0])
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printk(PREFIX "Tuner at band limit\n");
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else
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printk(PREFIX "Tuner not at band limit\n");
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div = ((buffer[0] & 0x3f) << 8) | buffer[1];
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switch (TEA5767_HIGH_LO_32768) {
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case TEA5767_HIGH_LO_13MHz:
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frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */
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break;
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case TEA5767_LOW_LO_13MHz:
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frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */
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break;
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case TEA5767_LOW_LO_32768:
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frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */
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break;
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case TEA5767_HIGH_LO_32768:
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default:
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frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */
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break;
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}
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buffer[0] = (div >> 8) & 0x3f;
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buffer[1] = div & 0xff;
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printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",
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frq / 1000, frq % 1000, div);
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if (TEA5767_STEREO_MASK & buffer[2])
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printk(PREFIX "Stereo\n");
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else
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printk(PREFIX "Mono\n");
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printk(PREFIX "IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK);
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printk(PREFIX "ADC Level = %d\n",
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(buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4);
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printk(PREFIX "Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK));
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printk(PREFIX "Reserved = 0x%02x\n",
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(buffer[4] & TEA5767_RESERVED_MASK));
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}
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/* Freq should be specifyed at 62.5 Hz */
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static int set_radio_freq(struct dvb_frontend *fe,
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struct analog_parameters *params)
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{
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struct tea5767_priv *priv = fe->tuner_priv;
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unsigned int frq = params->frequency;
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unsigned char buffer[5];
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unsigned div;
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int rc;
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tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000);
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/* Rounds freq to next decimal value - for 62.5 KHz step */
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/* frq = 20*(frq/16)+radio_frq[frq%16]; */
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buffer[2] = TEA5767_PORT1_HIGH;
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buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |
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TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND;
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buffer[4] = 0;
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if (params->audmode == V4L2_TUNER_MODE_MONO) {
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tuner_dbg("TEA5767 set to mono\n");
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buffer[2] |= TEA5767_MONO;
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} else {
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tuner_dbg("TEA5767 set to stereo\n");
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}
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/* Should be replaced */
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switch (TEA5767_HIGH_LO_32768) {
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case TEA5767_HIGH_LO_13MHz:
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tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n");
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buffer[2] |= TEA5767_HIGH_LO_INJECT;
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buffer[4] |= TEA5767_PLLREF_ENABLE;
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div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000;
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break;
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case TEA5767_LOW_LO_13MHz:
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tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n");
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buffer[4] |= TEA5767_PLLREF_ENABLE;
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div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000;
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break;
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case TEA5767_LOW_LO_32768:
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tuner_dbg("radio LOW LO inject xtal @ 32,768 MHz\n");
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buffer[3] |= TEA5767_XTAL_32768;
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/* const 700=4000*175 Khz - to adjust freq to right value */
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div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15;
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break;
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case TEA5767_HIGH_LO_32768:
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default:
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tuner_dbg("radio HIGH LO inject xtal @ 32,768 MHz\n");
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buffer[2] |= TEA5767_HIGH_LO_INJECT;
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buffer[3] |= TEA5767_XTAL_32768;
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div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15;
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break;
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| 248 |
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}
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buffer[0] = (div >> 8) & 0x3f;
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| 250 |
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buffer[1] = div & 0xff;
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| 252 |
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if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
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tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
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| 254 |
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| 255 |
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if (debug) {
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| 256 |
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if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5)))
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| 257 |
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tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
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| 258 |
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else
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| 259 |
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tea5767_status_dump(buffer);
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| 260 |
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}
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| 261 |
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| 262 |
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priv->frequency = frq * 125 / 2;
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| 263 |
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| 264 |
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return 0;
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| 265 |
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}
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| 266 |
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| 267 |
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static int tea5767_read_status(struct dvb_frontend *fe, char *buffer)
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| 268 |
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{
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| 269 |
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struct tea5767_priv *priv = fe->tuner_priv;
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| 270 |
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int rc;
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| 271 |
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| 272 |
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memset(buffer, 0, 5);
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| 273 |
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if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) {
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| 274 |
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tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
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| 275 |
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return -EREMOTEIO;
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| 276 |
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}
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| 277 |
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| 278 |
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return 0;
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| 279 |
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}
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| 280 |
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| 281 |
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static inline int tea5767_signal(struct dvb_frontend *fe, const char *buffer)
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| 282 |
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{
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| 283 |
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struct tea5767_priv *priv = fe->tuner_priv;
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| 284 |
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| 285 |
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int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8);
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| 286 |
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| 287 |
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tuner_dbg("Signal strength: %d\n", signal);
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| 288 |
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| 289 |
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return signal;
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| 290 |
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}
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| 291 |
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| 292 |
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static inline int tea5767_stereo(struct dvb_frontend *fe, const char *buffer)
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| 293 |
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{
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| 294 |
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struct tea5767_priv *priv = fe->tuner_priv;
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| 295 |
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| 296 |
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int stereo = buffer[2] & TEA5767_STEREO_MASK;
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| 297 |
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| 298 |
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tuner_dbg("Radio ST GET = %02x\n", stereo);
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| 299 |
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| 300 |
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return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
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| 301 |
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}
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| 302 |
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| 303 |
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static int tea5767_get_status(struct dvb_frontend *fe, u32 *status)
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| 304 |
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{
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| 305 |
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unsigned char buffer[5];
|
| 306 |
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|
| 307 |
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*status = 0;
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| 308 |
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| 309 |
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if (0 == tea5767_read_status(fe, buffer)) {
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| 310 |
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if (tea5767_signal(fe, buffer))
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| 311 |
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*status = TUNER_STATUS_LOCKED;
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| 312 |
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if (tea5767_stereo(fe, buffer))
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| 313 |
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*status |= TUNER_STATUS_STEREO;
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| 314 |
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}
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| 315 |
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| 316 |
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return 0;
|
| 317 |
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}
|
| 318 |
|
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|
| 319 |
|
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static int tea5767_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
|
| 320 |
|
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{
|
| 321 |
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unsigned char buffer[5];
|
| 322 |
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|
| 323 |
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*strength = 0;
|
| 324 |
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|
| 325 |
|
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if (0 == tea5767_read_status(fe, buffer))
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| 326 |
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*strength = tea5767_signal(fe, buffer);
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| 327 |
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|
| 328 |
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return 0;
|
| 329 |
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}
|
| 330 |
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|
| 331 |
|
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static int tea5767_standby(struct dvb_frontend *fe)
|
| 332 |
|
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{
|
| 333 |
|
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unsigned char buffer[5];
|
| 334 |
|
|
struct tea5767_priv *priv = fe->tuner_priv;
|
| 335 |
|
|
unsigned div, rc;
|
| 336 |
|
|
|
| 337 |
|
|
div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */
|
| 338 |
|
|
buffer[0] = (div >> 8) & 0x3f;
|
| 339 |
|
|
buffer[1] = div & 0xff;
|
| 340 |
|
|
buffer[2] = TEA5767_PORT1_HIGH;
|
| 341 |
|
|
buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL |
|
| 342 |
|
|
TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY;
|
| 343 |
|
|
buffer[4] = 0;
|
| 344 |
|
|
|
| 345 |
|
|
if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5)))
|
| 346 |
|
|
tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
|
| 347 |
|
|
|
| 348 |
|
|
return 0;
|
| 349 |
|
|
}
|
| 350 |
|
|
|
| 351 |
|
|
int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
|
| 352 |
|
|
{
|
| 353 |
|
|
struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
|
| 354 |
|
|
unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
|
| 355 |
|
|
int rc;
|
| 356 |
|
|
|
| 357 |
|
|
if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) {
|
| 358 |
|
|
printk(KERN_WARNING "It is not a TEA5767. Received %i bytes.\n", rc);
|
| 359 |
|
|
return EINVAL;
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
|
|
/* If all bytes are the same then it's a TV tuner and not a tea5767 */
|
| 363 |
|
|
if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
|
| 364 |
|
|
buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
|
| 365 |
|
|
printk(KERN_WARNING "All bytes are equal. It is not a TEA5767\n");
|
| 366 |
|
|
return EINVAL;
|
| 367 |
|
|
}
|
| 368 |
|
|
|
| 369 |
|
|
/* Status bytes:
|
| 370 |
|
|
* Byte 4: bit 3:1 : CI (Chip Identification) == 0
|
| 371 |
|
|
* bit 0 : internally set to 0
|
| 372 |
|
|
* Byte 5: bit 7:0 : == 0
|
| 373 |
|
|
*/
|
| 374 |
|
|
if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) {
|
| 375 |
|
|
printk(KERN_WARNING "Chip ID is not zero. It is not a TEA5767\n");
|
| 376 |
|
|
return EINVAL;
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
/* It seems that tea5767 returns 0xff after the 5th byte */
|
| 380 |
|
|
if ((buffer[5] != 0xff) || (buffer[6] != 0xff)) {
|
| 381 |
|
|
printk(KERN_WARNING "Returned more than 5 bytes. It is not a TEA5767\n");
|
| 382 |
|
|
return EINVAL;
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
printk(KERN_WARNING "TEA5767 detected.\n");
|
| 386 |
|
|
return 0;
|
| 387 |
|
|
}
|
| 388 |
|
|
|
| 389 |
|
|
static int tea5767_release(struct dvb_frontend *fe)
|
| 390 |
|
|
{
|
| 391 |
|
|
kfree(fe->tuner_priv);
|
| 392 |
|
|
fe->tuner_priv = NULL;
|
| 393 |
|
|
|
| 394 |
|
|
return 0;
|
| 395 |
|
|
}
|
| 396 |
|
|
|
| 397 |
|
|
static int tea5767_get_frequency(struct dvb_frontend *fe, u32 *frequency)
|
| 398 |
|
|
{
|
| 399 |
|
|
struct tea5767_priv *priv = fe->tuner_priv;
|
| 400 |
|
|
*frequency = priv->frequency;
|
| 401 |
|
|
return 0;
|
| 402 |
|
|
}
|
| 403 |
|
|
|
| 404 |
|
|
static struct dvb_tuner_ops tea5767_tuner_ops = {
|
| 405 |
|
|
.info = {
|
| 406 |
|
|
.name = "tea5767", // Philips TEA5767HN FM Radio
|
| 407 |
|
|
},
|
| 408 |
|
|
|
| 409 |
|
|
.set_analog_params = set_radio_freq,
|
| 410 |
|
|
.sleep = tea5767_standby,
|
| 411 |
|
|
.release = tea5767_release,
|
| 412 |
|
|
.get_frequency = tea5767_get_frequency,
|
| 413 |
|
|
.get_status = tea5767_get_status,
|
| 414 |
|
|
.get_rf_strength = tea5767_get_rf_strength,
|
| 415 |
|
|
};
|
| 416 |
|
|
|
| 417 |
|
|
struct dvb_frontend *tea5767_attach(struct dvb_frontend *fe,
|
| 418 |
|
|
struct i2c_adapter* i2c_adap,
|
| 419 |
|
|
u8 i2c_addr)
|
| 420 |
|
|
{
|
| 421 |
|
|
struct tea5767_priv *priv = NULL;
|
| 422 |
|
|
|
| 423 |
|
|
priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL);
|
| 424 |
|
|
if (priv == NULL)
|
| 425 |
|
|
return NULL;
|
| 426 |
|
|
fe->tuner_priv = priv;
|
| 427 |
|
|
|
| 428 |
|
|
priv->i2c_props.addr = i2c_addr;
|
| 429 |
|
|
priv->i2c_props.adap = i2c_adap;
|
| 430 |
|
|
|
| 431 |
|
|
memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops,
|
| 432 |
|
|
sizeof(struct dvb_tuner_ops));
|
| 433 |
|
|
|
| 434 |
|
|
tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio");
|
| 435 |
|
|
|
| 436 |
|
|
return fe;
|
| 437 |
|
|
}
|
| 438 |
|
|
|
| 439 |
|
|
|
| 440 |
|
|
EXPORT_SYMBOL_GPL(tea5767_attach);
|
| 441 |
|
|
EXPORT_SYMBOL_GPL(tea5767_autodetection);
|
| 442 |
|
|
|
| 443 |
|
|
MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver");
|
| 444 |
|
|
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
|
| 445 |
|
|
MODULE_LICENSE("GPL");
|
