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473 lines
12 KiB
473 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview |
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// I2C address is always 0xC0. |
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// |
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// Copyright (c) 2005 Mauro Carvalho Chehab <[email protected]> |
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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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/i2c.h> |
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#include <linux/slab.h> |
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#include <linux/delay.h> |
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#include <linux/videodev2.h> |
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#include "tuner-i2c.h" |
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#include "tea5767.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, "enable verbose debug messages"); |
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/*****************************************************************************/ |
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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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struct tea5767_ctrl ctrl; |
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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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/*****************************************************************************/ |
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static void tea5767_status_dump(struct tea5767_priv *priv, |
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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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tuner_info("Ready Flag ON\n"); |
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else |
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tuner_info("Ready Flag OFF\n"); |
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if (TEA5767_BAND_LIMIT_MASK & buffer[0]) |
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tuner_info("Tuner at band limit\n"); |
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else |
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tuner_info("Tuner not at band limit\n"); |
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div = ((buffer[0] & 0x3f) << 8) | buffer[1]; |
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switch (priv->ctrl.xtal_freq) { |
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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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tuner_info("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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tuner_info("Stereo\n"); |
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else |
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tuner_info("Mono\n"); |
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tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK); |
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tuner_info("ADC Level = %d\n", |
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(buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4); |
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tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK)); |
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tuner_info("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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buffer[2] = 0; |
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if (priv->ctrl.port1) |
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buffer[2] |= TEA5767_PORT1_HIGH; |
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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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buffer[3] = 0; |
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if (priv->ctrl.port2) |
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buffer[3] |= TEA5767_PORT2_HIGH; |
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if (priv->ctrl.high_cut) |
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buffer[3] |= TEA5767_HIGH_CUT_CTRL; |
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if (priv->ctrl.st_noise) |
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buffer[3] |= TEA5767_ST_NOISE_CTL; |
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if (priv->ctrl.soft_mute) |
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buffer[3] |= TEA5767_SOFT_MUTE; |
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if (priv->ctrl.japan_band) |
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buffer[3] |= TEA5767_JAPAN_BAND; |
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buffer[4] = 0; |
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if (priv->ctrl.deemph_75) |
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buffer[4] |= TEA5767_DEEMPH_75; |
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if (priv->ctrl.pllref) |
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buffer[4] |= TEA5767_PLLREF_ENABLE; |
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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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switch (priv->ctrl.xtal_freq) { |
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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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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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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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} |
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buffer[0] = (div >> 8) & 0x3f; |
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buffer[1] = div & 0xff; |
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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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if (debug) { |
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if (5 != (rc = tuner_i2c_xfer_recv(&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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else |
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tea5767_status_dump(priv, buffer); |
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} |
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priv->frequency = frq * 125 / 2; |
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return 0; |
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} |
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static int tea5767_read_status(struct dvb_frontend *fe, char *buffer) |
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{ |
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struct tea5767_priv *priv = fe->tuner_priv; |
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int rc; |
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memset(buffer, 0, 5); |
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if (5 != (rc = tuner_i2c_xfer_recv(&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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return -EREMOTEIO; |
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} |
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return 0; |
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} |
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static inline int tea5767_signal(struct dvb_frontend *fe, const char *buffer) |
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{ |
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struct tea5767_priv *priv = fe->tuner_priv; |
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int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8); |
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tuner_dbg("Signal strength: %d\n", signal); |
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return signal; |
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} |
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static inline int tea5767_stereo(struct dvb_frontend *fe, const char *buffer) |
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{ |
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struct tea5767_priv *priv = fe->tuner_priv; |
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int stereo = buffer[2] & TEA5767_STEREO_MASK; |
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tuner_dbg("Radio ST GET = %02x\n", stereo); |
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return (stereo ? V4L2_TUNER_SUB_STEREO : 0); |
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} |
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static int tea5767_get_status(struct dvb_frontend *fe, u32 *status) |
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{ |
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unsigned char buffer[5]; |
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*status = 0; |
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if (0 == tea5767_read_status(fe, buffer)) { |
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if (tea5767_signal(fe, buffer)) |
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*status = TUNER_STATUS_LOCKED; |
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if (tea5767_stereo(fe, buffer)) |
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*status |= TUNER_STATUS_STEREO; |
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} |
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return 0; |
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} |
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static int tea5767_get_rf_strength(struct dvb_frontend *fe, u16 *strength) |
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{ |
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unsigned char buffer[5]; |
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*strength = 0; |
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if (0 == tea5767_read_status(fe, buffer)) |
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*strength = tea5767_signal(fe, buffer); |
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return 0; |
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} |
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static int tea5767_standby(struct dvb_frontend *fe) |
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{ |
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unsigned char buffer[5]; |
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struct tea5767_priv *priv = fe->tuner_priv; |
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unsigned div, rc; |
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div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */ |
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buffer[0] = (div >> 8) & 0x3f; |
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buffer[1] = div & 0xff; |
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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 | TEA5767_STDBY; |
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buffer[4] = 0; |
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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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return 0; |
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} |
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int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr) |
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{ |
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struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr }; |
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unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
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int rc; |
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if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) { |
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pr_warn("It is not a TEA5767. Received %i bytes.\n", rc); |
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return -EINVAL; |
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} |
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/* If all bytes are the same then it's a TV tuner and not a tea5767 */ |
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if (buffer[0] == buffer[1] && buffer[0] == buffer[2] && |
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buffer[0] == buffer[3] && buffer[0] == buffer[4]) { |
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pr_warn("All bytes are equal. It is not a TEA5767\n"); |
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return -EINVAL; |
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} |
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/* Status bytes: |
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* Byte 4: bit 3:1 : CI (Chip Identification) == 0 |
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* bit 0 : internally set to 0 |
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* Byte 5: bit 7:0 : == 0 |
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*/ |
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if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) { |
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pr_warn("Chip ID is not zero. It is not a TEA5767\n"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static void tea5767_release(struct dvb_frontend *fe) |
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{ |
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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 int tea5767_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
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{ |
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struct tea5767_priv *priv = fe->tuner_priv; |
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*frequency = priv->frequency; |
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return 0; |
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} |
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static int tea5767_set_config (struct dvb_frontend *fe, void *priv_cfg) |
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{ |
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struct tea5767_priv *priv = fe->tuner_priv; |
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memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl)); |
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return 0; |
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} |
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static const struct dvb_tuner_ops tea5767_tuner_ops = { |
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.info = { |
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.name = "tea5767", // Philips TEA5767HN FM Radio |
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}, |
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.set_analog_params = set_radio_freq, |
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.set_config = tea5767_set_config, |
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.sleep = tea5767_standby, |
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.release = tea5767_release, |
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.get_frequency = tea5767_get_frequency, |
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.get_status = tea5767_get_status, |
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.get_rf_strength = tea5767_get_rf_strength, |
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}; |
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struct dvb_frontend *tea5767_attach(struct dvb_frontend *fe, |
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struct i2c_adapter* i2c_adap, |
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u8 i2c_addr) |
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{ |
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struct tea5767_priv *priv = NULL; |
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priv = kzalloc(sizeof(struct tea5767_priv), GFP_KERNEL); |
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if (priv == NULL) |
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return NULL; |
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fe->tuner_priv = priv; |
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priv->i2c_props.addr = i2c_addr; |
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priv->i2c_props.adap = i2c_adap; |
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priv->i2c_props.name = "tea5767"; |
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priv->ctrl.xtal_freq = TEA5767_HIGH_LO_32768; |
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priv->ctrl.port1 = 1; |
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priv->ctrl.port2 = 1; |
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priv->ctrl.high_cut = 1; |
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priv->ctrl.st_noise = 1; |
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priv->ctrl.japan_band = 1; |
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memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops, |
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sizeof(struct dvb_tuner_ops)); |
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tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio"); |
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return fe; |
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} |
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EXPORT_SYMBOL_GPL(tea5767_attach); |
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EXPORT_SYMBOL_GPL(tea5767_autodetection); |
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MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver"); |
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MODULE_AUTHOR("Mauro Carvalho Chehab <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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