| /* |
| * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview |
| * I2C address is allways 0xC0. |
| * |
| * |
| * Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@infradead.org) |
| * 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/delay.h> |
| #include <linux/videodev.h> |
| #include "tuner-driver.h" |
| |
| #define PREFIX "TEA5767 " |
| |
| /* from tuner-core.c */ |
| extern int tuner_debug; |
| |
| /*****************************************************************************/ |
| |
| /****************************** |
| * 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 |
| |
| /* Fourth 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 |
| |
| /* Fifth 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 |
| |
| /* Fourth register */ |
| #define TEA5767_ADC_LEVEL_MASK 0xf0 |
| |
| /* should be 0 */ |
| #define TEA5767_CHIP_ID_MASK 0x0f |
| |
| /* Fifth 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->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) << 8); |
| } |
| |
| 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); |
| } |
| |
| static void tea5767_standby(struct i2c_client *c) |
| { |
| unsigned char buffer[5]; |
| struct tuner *t = i2c_get_clientdata(c); |
| unsigned div, rc; |
| |
| div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */ |
| buffer[0] = (div >> 8) & 0x3f; |
| buffer[1] = div & 0xff; |
| buffer[2] = TEA5767_PORT1_HIGH; |
| buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL | |
| TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY; |
| buffer[4] = 0; |
| |
| if (5 != (rc = i2c_master_send(c, buffer, 5))) |
| tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); |
| } |
| |
| int tea5767_autodetection(struct i2c_client *c) |
| { |
| unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
| int rc; |
| struct tuner *t = i2c_get_clientdata(c); |
| |
| if ((rc = i2c_master_recv(c, buffer, 7))< 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 */ |
| 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; |
| } |
| |
| /* It seems that tea5767 returns 0xff after the 5th byte */ |
| if ((buffer[5] != 0xff) || (buffer[6] != 0xff)) { |
| tuner_warn("Returned more than 5 bytes. It is not a TEA5767\n"); |
| return EINVAL; |
| } |
| |
| tuner_warn("TEA5767 detected.\n"); |
| return 0; |
| } |
| |
| static struct tuner_operations tea5767_tuner_ops = { |
| .set_tv_freq = set_tv_freq, |
| .set_radio_freq = set_radio_freq, |
| .has_signal = tea5767_signal, |
| .is_stereo = tea5767_stereo, |
| .standby = tea5767_standby, |
| }; |
| |
| int tea5767_tuner_init(struct i2c_client *c) |
| { |
| struct tuner *t = i2c_get_clientdata(c); |
| |
| tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5767HN FM Radio"); |
| strlcpy(c->name, "tea5767", sizeof(c->name)); |
| |
| memcpy(&t->ops, &tea5767_tuner_ops, sizeof(struct tuner_operations)); |
| |
| return (0); |
| } |