/* * For Philips TEA5761 FM Chip * I2C address is allways 0x20 (0x10 at 7-bit mode). * * Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org) * This code is placed under the terms of the GNUv2 General Public License * */ #include #include #include #include #include "tuner-driver.h" #define PREFIX "TEA5761 " /* from tuner-core.c */ extern int tuner_debug; /*****************************************************************************/ /*************************** * TEA5761HN I2C registers * ***************************/ /* INTREG - Read: bytes 0 and 1 / Write: byte 0 */ /* first byte for reading */ #define TEA5761_INTREG_IFFLAG 0x10 #define TEA5761_INTREG_LEVFLAG 0x8 #define TEA5761_INTREG_FRRFLAG 0x2 #define TEA5761_INTREG_BLFLAG 0x1 /* second byte for reading / byte for writing */ #define TEA5761_INTREG_IFMSK 0x10 #define TEA5761_INTREG_LEVMSK 0x8 #define TEA5761_INTREG_FRMSK 0x2 #define TEA5761_INTREG_BLMSK 0x1 /* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */ /* First byte */ #define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */ #define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */ /* Bits 0-5 for divider MSB */ /* Second byte */ /* Bits 0-7 for divider LSB */ /* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */ /* first byte */ #define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */ #define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */ #define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */ #define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */ #define TEA5761_TNCTRL_AFM 0x04 #define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */ #define TEA5761_TNCTRL_SNC 0x01 /* second byte */ #define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */ #define TEA5761_TNCTRL_SSL_1 0x40 #define TEA5761_TNCTRL_SSL_0 0x20 #define TEA5761_TNCTRL_HLSI 0x10 #define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */ #define TEA5761_TNCTRL_SWP 0x04 #define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */ #define TEA5761_TNCTRL_AHLSI 0x01 /* FRQCHECK - Read: bytes 6 and 7 */ /* First byte */ /* Bits 0-5 for divider MSB */ /* Second byte */ /* Bits 0-7 for divider LSB */ /* TUNCHECK - Read: bytes 8 and 9 */ /* First byte */ #define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */ #define TEA5761_TUNCHECK_TUNTO 0x01 /* Second byte */ #define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */ #define TEA5761_TUNCHECK_LD 0x08 #define TEA5761_TUNCHECK_STEREO 0x04 /* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */ /* All zero = no test mode */ /* MANID - Read: bytes 12 and 13 */ /* First byte - should be 0x10 */ #define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */ #define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */ /* Second byte - Should be 0x2b */ #define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */ #define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */ /* Chip ID - Read: bytes 14 and 15 */ /* First byte - should be 0x57 */ /* Second byte - should be 0x61 */ /*****************************************************************************/ 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"); } #define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */ static void tea5761_status_dump(unsigned char *buffer) { unsigned int div, frq; div = ((buffer[2] & 0x3f) << 8) | buffer[3]; frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */ printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n", frq / 1000, frq % 1000, div); } /* 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[7] = {0, 0, 0, 0, 0, 0, 0 }; unsigned div; int rc; tuner_dbg (PREFIX "radio freq counter %d\n", frq); if (t->mode == T_STANDBY) { tuner_dbg("TEA5761 set to standby mode\n"); buffer[5] |= TEA5761_TNCTRL_MU; } else { buffer[4] |= TEA5761_TNCTRL_PUPD_0; } if (t->audmode == V4L2_TUNER_MODE_MONO) { tuner_dbg("TEA5761 set to mono\n"); buffer[5] |= TEA5761_TNCTRL_MST; ; } else { tuner_dbg("TEA5761 set to stereo\n"); } div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15; buffer[1] = (div >> 8) & 0x3f; buffer[2] = div & 0xff; if (tuner_debug) tea5761_status_dump(buffer); if (7 != (rc = i2c_master_send(c, buffer, 7))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); } static int tea5761_signal(struct i2c_client *c) { unsigned char buffer[16]; int rc; struct tuner *t = i2c_get_clientdata(c); memset(buffer, 0, sizeof(buffer)); if (16 != (rc = i2c_master_recv(c, buffer, 16))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); return ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4)); } static int tea5761_stereo(struct i2c_client *c) { unsigned char buffer[16]; int rc; struct tuner *t = i2c_get_clientdata(c); memset(buffer, 0, sizeof(buffer)); if (16 != (rc = i2c_master_recv(c, buffer, 16))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); rc = buffer[9] & TEA5761_TUNCHECK_STEREO; tuner_dbg("TEA5761 radio ST GET = %02x\n", rc); return (rc ? V4L2_TUNER_SUB_STEREO : 0); } int tea5761_autodetection(struct i2c_client *c) { unsigned char buffer[16]; int rc; struct tuner *t = i2c_get_clientdata(c); if (16 != (rc = i2c_master_recv(c, buffer, 16))) { tuner_warn("it is not a TEA5761. Received %i chars.\n", rc); return EINVAL; } if (!((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061))) { tuner_warn("Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n",buffer[13],buffer[14],buffer[15]); return EINVAL; } tuner_warn("TEA5761 detected.\n"); return 0; } static struct tuner_operations tea5761_tuner_ops = { .set_tv_freq = set_tv_freq, .set_radio_freq = set_radio_freq, .has_signal = tea5761_signal, .is_stereo = tea5761_stereo, }; int tea5761_tuner_init(struct i2c_client *c) { struct tuner *t = i2c_get_clientdata(c); if (tea5761_autodetection(c) == EINVAL) return EINVAL; tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5761HN FM Radio"); strlcpy(c->name, "tea5761", sizeof(c->name)); memcpy(&t->ops, &tea5761_tuner_ops, sizeof(struct tuner_operations)); return (0); }