/* * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview * I2C address is allways 0xC0. * * $Id: tea5767.c,v 1.11 2005/06/21 15:40:33 mchehab Exp $ * * Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@brturbo.com.br) * This code is placed under the terms of the GNU General Public License * * tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa * from their contributions on DScaler. */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* Declared at tuner-core.c */ extern unsigned int tuner_debug; #define PREFIX "TEA5767 " /*****************************************************************************/ /****************************** * Write mode register values * ******************************/ /* First register */ #define TEA5767_MUTE 0x80 /* Mutes output */ #define TEA5767_SEARCH 0x40 /* Activates station search */ /* Bits 0-5 for divider MSB */ /* Second register */ /* Bits 0-7 for divider LSB */ /* Third register */ /* Station search from botton to up */ #define TEA5767_SEARCH_UP 0x80 /* Searches with ADC output = 10 */ #define TEA5767_SRCH_HIGH_LVL 0x60 /* Searches with ADC output = 10 */ #define TEA5767_SRCH_MID_LVL 0x40 /* Searches with ADC output = 5 */ #define TEA5767_SRCH_LOW_LVL 0x20 /* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */ #define TEA5767_HIGH_LO_INJECT 0x10 /* Disable stereo */ #define TEA5767_MONO 0x08 /* Disable right channel and turns to mono */ #define TEA5767_MUTE_RIGHT 0x04 /* Disable left channel and turns to mono */ #define TEA5767_MUTE_LEFT 0x02 #define TEA5767_PORT1_HIGH 0x01 /* Forth register */ #define TEA5767_PORT2_HIGH 0x80 /* Chips stops working. Only I2C bus remains on */ #define TEA5767_STDBY 0x40 /* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */ #define TEA5767_JAPAN_BAND 0x20 /* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */ #define TEA5767_XTAL_32768 0x10 /* Cuts weak signals */ #define TEA5767_SOFT_MUTE 0x08 /* Activates high cut control */ #define TEA5767_HIGH_CUT_CTRL 0x04 /* Activates stereo noise control */ #define TEA5767_ST_NOISE_CTL 0x02 /* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */ #define TEA5767_SRCH_IND 0x01 /* Fiveth register */ /* By activating, it will use Xtal at 13 MHz as reference for divider */ #define TEA5767_PLLREF_ENABLE 0x80 /* By activating, deemphasis=50, or else, deemphasis of 50us */ #define TEA5767_DEEMPH_75 0X40 /***************************** * Read mode register values * *****************************/ /* First register */ #define TEA5767_READY_FLAG_MASK 0x80 #define TEA5767_BAND_LIMIT_MASK 0X40 /* Bits 0-5 for divider MSB after search or preset */ /* Second register */ /* Bits 0-7 for divider LSB after search or preset */ /* Third register */ #define TEA5767_STEREO_MASK 0x80 #define TEA5767_IF_CNTR_MASK 0x7f /* Four register */ #define TEA5767_ADC_LEVEL_MASK 0xf0 /* should be 0 */ #define TEA5767_CHIP_ID_MASK 0x0f /* Fiveth register */ /* Reserved for future extensions */ #define TEA5767_RESERVED_MASK 0xff /*****************************************************************************/ static void set_tv_freq(struct i2c_client *c, unsigned int freq) { struct tuner *t = i2c_get_clientdata(c); tuner_warn("This tuner doesn't support TV freq.\n"); } static void tea5767_status_dump(unsigned char *buffer) { unsigned int div, frq; if (TEA5767_READY_FLAG_MASK & buffer[0]) printk(PREFIX "Ready Flag ON\n"); else printk(PREFIX "Ready Flag OFF\n"); if (TEA5767_BAND_LIMIT_MASK & buffer[0]) printk(PREFIX "Tuner at band limit\n"); else printk(PREFIX "Tuner not at band limit\n"); div=((buffer[0]&0x3f)<<8) | buffer[1]; switch (TEA5767_HIGH_LO_32768) { case TEA5767_HIGH_LO_13MHz: frq = 1000*(div*50-700-225)/4; /* Freq in KHz */ break; case TEA5767_LOW_LO_13MHz: frq = 1000*(div*50+700+225)/4; /* Freq in KHz */ break; case TEA5767_LOW_LO_32768: frq = 1000*(div*32768/1000+700+225)/4; /* Freq in KHz */ break; case TEA5767_HIGH_LO_32768: default: frq = 1000*(div*32768/1000-700-225)/4; /* Freq in KHz */ break; } buffer[0] = (div>>8) & 0x3f; buffer[1] = div & 0xff; printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n", frq/1000,frq%1000,div); if (TEA5767_STEREO_MASK & buffer[2]) printk(PREFIX "Stereo\n"); else printk(PREFIX "Mono\n"); printk(PREFIX "IF Counter = %d\n",buffer[2] & TEA5767_IF_CNTR_MASK); printk(PREFIX "ADC Level = %d\n",(buffer[3] & TEA5767_ADC_LEVEL_MASK)>>4); printk(PREFIX "Chip ID = %d\n",(buffer[3] & TEA5767_CHIP_ID_MASK)); printk(PREFIX "Reserved = 0x%02x\n",(buffer[4] & TEA5767_RESERVED_MASK)); } /* Freq should be specifyed at 62.5 Hz */ static void set_radio_freq(struct i2c_client *c, unsigned int frq) { struct tuner *t = i2c_get_clientdata(c); unsigned char buffer[5]; unsigned div; int rc; if ( tuner_debug ) printk(PREFIX "radio freq counter %d\n",frq); /* Rounds freq to next decimal value - for 62.5 KHz step */ /* frq = 20*(frq/16)+radio_frq[frq%16]; */ buffer[2] = TEA5767_PORT1_HIGH; buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL | TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND; buffer[4]=0; if (t->audmode == V4L2_TUNER_MODE_MONO) { tuner_dbg("TEA5767 set to mono\n"); buffer[2] |= TEA5767_MONO; } else tuner_dbg("TEA5767 set to stereo\n"); switch (t->type) { case TEA5767_HIGH_LO_13MHz: tuner_dbg("TEA5767 radio HIGH LO inject xtal @ 13 MHz\n"); buffer[2] |= TEA5767_HIGH_LO_INJECT; buffer[4] |= TEA5767_PLLREF_ENABLE; div = (frq*4/16+700+225+25)/50; break; case TEA5767_LOW_LO_13MHz: tuner_dbg("TEA5767 radio LOW LO inject xtal @ 13 MHz\n"); buffer[4] |= TEA5767_PLLREF_ENABLE; div = (frq*4/16-700-225+25)/50; break; case TEA5767_LOW_LO_32768: tuner_dbg("TEA5767 radio LOW LO inject xtal @ 32,768 MHz\n"); buffer[3] |= TEA5767_XTAL_32768; /* const 700=4000*175 Khz - to adjust freq to right value */ div = (1000*(frq*4/16-700-225)+16384)>>15; break; case TEA5767_HIGH_LO_32768: default: tuner_dbg("TEA5767 radio HIGH LO inject xtal @ 32,768 MHz\n"); buffer[2] |= TEA5767_HIGH_LO_INJECT; buffer[3] |= TEA5767_XTAL_32768; div = (1000*(frq*4/16+700+225)+16384)>>15; break; } buffer[0] = (div>>8) & 0x3f; buffer[1] = div & 0xff; if ( tuner_debug ) tea5767_status_dump(buffer); if (5 != (rc = i2c_master_send(c,buffer,5))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n",rc); } static int tea5767_signal(struct i2c_client *c) { unsigned char buffer[5]; int rc; struct tuner *t = i2c_get_clientdata(c); memset(buffer,0,sizeof(buffer)); if (5 != (rc = i2c_master_recv(c,buffer,5))) tuner_warn ( "i2c i/o error: rc == %d (should be 5)\n",rc); return ((buffer[3] & TEA5767_ADC_LEVEL_MASK) <<(13-4)); } static int tea5767_stereo(struct i2c_client *c) { unsigned char buffer[5]; int rc; struct tuner *t = i2c_get_clientdata(c); memset(buffer,0,sizeof(buffer)); if (5 != (rc = i2c_master_recv(c,buffer,5))) tuner_warn ( "i2c i/o error: rc == %d (should be 5)\n",rc); rc = buffer[2] & TEA5767_STEREO_MASK; if ( tuner_debug ) tuner_dbg("TEA5767 radio ST GET = %02x\n", rc); return ( (buffer[2] & TEA5767_STEREO_MASK) ? V4L2_TUNER_SUB_STEREO: 0); } int tea_detection(struct i2c_client *c) { unsigned char buffer[5]= { 0xff, 0xff, 0xff, 0xff, 0xff }; int rc; struct tuner *t = i2c_get_clientdata(c); if (5 != (rc = i2c_master_recv(c,buffer,5))) { tuner_warn ( "it is not a TEA5767. Received %i chars.\n",rc ); return EINVAL; } /* If all bytes are the same then it's a TV tuner and not a tea5767 chip. */ if (buffer[0] == buffer[1] && buffer[0] == buffer[2] && buffer[0] == buffer[3] && buffer[0] == buffer[4]) { tuner_warn ( "All bytes are equal. It is not a TEA5767\n" ); return EINVAL; } /* Status bytes: * Byte 4: bit 3:1 : CI (Chip Identification) == 0 * bit 0 : internally set to 0 * Byte 5: bit 7:0 : == 0 */ if (!((buffer[3] & 0x0f) == 0x00) && (buffer[4] == 0x00)) { tuner_warn ( "Chip ID is not zero. It is not a TEA5767\n" ); return EINVAL; } tuner_warn ( "TEA5767 detected.\n" ); return 0; } int tea5767_tuner_init(struct i2c_client *c) { struct tuner *t = i2c_get_clientdata(c); if (tea_detection(c)==EINVAL) return EINVAL; tuner_info("type set to %d (%s)\n", t->type, TEA5767_TUNER_NAME); strlcpy(c->name, TEA5767_TUNER_NAME, sizeof(c->name)); t->tv_freq = set_tv_freq; t->radio_freq = set_radio_freq; t->has_signal = tea5767_signal; t->is_stereo = tea5767_stereo; return (0); }