diff options
Diffstat (limited to 'drivers/media/video/tea5767.c')
| -rw-r--r-- | drivers/media/video/tea5767.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/drivers/media/video/tea5767.c b/drivers/media/video/tea5767.c new file mode 100644 index 00000000000..4d27ac1b7fb --- /dev/null +++ b/drivers/media/video/tea5767.c @@ -0,0 +1,342 @@ +/* + * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview + * I2C address is allways 0xC0. + * + * $Id: tea5767.c,v 1.21 2005/07/14 03:06:43 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 <linux/i2c.h> +#include <linux/videodev.h> +#include <linux/delay.h> +#include <media/tuner.h> +#include <media/tuner.h> + +#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 + +enum tea5767_xtal_freq { + TEA5767_LOW_LO_32768 = 0, + TEA5767_HIGH_LO_32768 = 1, + TEA5767_LOW_LO_13MHz = 2, + TEA5767_HIGH_LO_13MHz = 3, +}; + + +/*****************************************************************************/ + +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 = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */ + break; + case TEA5767_LOW_LO_13MHz: + frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */ + break; + case TEA5767_LOW_LO_32768: + frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */ + break; + case TEA5767_HIGH_LO_32768: + default: + frq = (div * 32768 - 700000 - 225000) / 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; + + tuner_dbg (PREFIX "radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000); + + /* 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->mode == T_STANDBY) { + tuner_dbg("TEA5767 set to standby mode\n"); + buffer[3] |= TEA5767_STDBY; + } + + 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"); + } + + /* Should be replaced */ + switch (TEA5767_HIGH_LO_32768) { + 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 * 4000 / 16 + 700000 + 225000 + 25000) / 50000; + break; + case TEA5767_LOW_LO_13MHz: + tuner_dbg ("TEA5767 radio LOW LO inject xtal @ 13 MHz\n"); + + buffer[4] |= TEA5767_PLLREF_ENABLE; + div = (frq * 4000 / 16 - 700000 - 225000 + 25000) / 50000; + 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 = ((frq * 4000 / 16 - 700000 - 225000) + 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 = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15; + break; + } + buffer[0] = (div >> 8) & 0x3f; + buffer[1] = div & 0xff; + + if (5 != (rc = i2c_master_send(c, buffer, 5))) + tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); + + if (tuner_debug) { + if (5 != (rc = i2c_master_recv(c, buffer, 5))) + tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); + else + tea5767_status_dump(buffer); + } +} + +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; + + tuner_dbg("TEA5767 radio ST GET = %02x\n", rc); + + return ((buffer[2] & TEA5767_STEREO_MASK) ? V4L2_TUNER_SUB_STEREO : 0); +} + +int tea5767_autodetection(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 bytes.\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 (tea5767_autodetection(c) == EINVAL) + return EINVAL; + + tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5767HN FM Radio"); + strlcpy(c->name, "tea5767", 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); +} |