mirror of https://gitee.com/openkylin/linux.git
244 lines
6.5 KiB
C
244 lines
6.5 KiB
C
/*
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* For Philips TEA5761 FM Chip
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* I2C address is allways 0x20 (0x10 at 7-bit mode).
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*
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* Copyright (c) 2005-2007 Mauro Carvalho Chehab (mchehab@infradead.org)
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* This code is placed under the terms of the GNUv2 General Public License
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*
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*/
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#include <linux/i2c.h>
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#include <linux/videodev.h>
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#include <linux/delay.h>
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#include <media/tuner.h>
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#include "tuner-driver.h"
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#define PREFIX "TEA5761 "
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/* from tuner-core.c */
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extern int tuner_debug;
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/*****************************************************************************/
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/***************************
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* TEA5761HN I2C registers *
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***************************/
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/* INTREG - Read: bytes 0 and 1 / Write: byte 0 */
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/* first byte for reading */
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#define TEA5761_INTREG_IFFLAG 0x10
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#define TEA5761_INTREG_LEVFLAG 0x8
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#define TEA5761_INTREG_FRRFLAG 0x2
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#define TEA5761_INTREG_BLFLAG 0x1
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/* second byte for reading / byte for writing */
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#define TEA5761_INTREG_IFMSK 0x10
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#define TEA5761_INTREG_LEVMSK 0x8
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#define TEA5761_INTREG_FRMSK 0x2
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#define TEA5761_INTREG_BLMSK 0x1
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/* FRQSET - Read: bytes 2 and 3 / Write: byte 1 and 2 */
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/* First byte */
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#define TEA5761_FRQSET_SEARCH_UP 0x80 /* 1=Station search from botton to up */
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#define TEA5761_FRQSET_SEARCH_MODE 0x40 /* 1=Search mode */
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/* Bits 0-5 for divider MSB */
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/* Second byte */
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/* Bits 0-7 for divider LSB */
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/* TNCTRL - Read: bytes 4 and 5 / Write: Bytes 3 and 4 */
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/* first byte */
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#define TEA5761_TNCTRL_PUPD_0 0x40 /* Power UP/Power Down MSB */
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#define TEA5761_TNCTRL_BLIM 0X20 /* 1= Japan Frequencies, 0= European frequencies */
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#define TEA5761_TNCTRL_SWPM 0x10 /* 1= software port is FRRFLAG */
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#define TEA5761_TNCTRL_IFCTC 0x08 /* 1= IF count time 15.02 ms, 0= IF count time 2.02 ms */
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#define TEA5761_TNCTRL_AFM 0x04
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#define TEA5761_TNCTRL_SMUTE 0x02 /* 1= Soft mute */
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#define TEA5761_TNCTRL_SNC 0x01
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/* second byte */
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#define TEA5761_TNCTRL_MU 0x80 /* 1=Hard mute */
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#define TEA5761_TNCTRL_SSL_1 0x40
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#define TEA5761_TNCTRL_SSL_0 0x20
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#define TEA5761_TNCTRL_HLSI 0x10
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#define TEA5761_TNCTRL_MST 0x08 /* 1 = mono */
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#define TEA5761_TNCTRL_SWP 0x04
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#define TEA5761_TNCTRL_DTC 0x02 /* 1 = deemphasis 50 us, 0 = deemphasis 75 us */
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#define TEA5761_TNCTRL_AHLSI 0x01
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/* FRQCHECK - Read: bytes 6 and 7 */
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/* First byte */
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/* Bits 0-5 for divider MSB */
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/* Second byte */
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/* Bits 0-7 for divider LSB */
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/* TUNCHECK - Read: bytes 8 and 9 */
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/* First byte */
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#define TEA5761_TUNCHECK_IF_MASK 0x7e /* IF count */
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#define TEA5761_TUNCHECK_TUNTO 0x01
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/* Second byte */
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#define TEA5761_TUNCHECK_LEV_MASK 0xf0 /* Level Count */
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#define TEA5761_TUNCHECK_LD 0x08
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#define TEA5761_TUNCHECK_STEREO 0x04
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/* TESTREG - Read: bytes 10 and 11 / Write: bytes 5 and 6 */
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/* All zero = no test mode */
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/* MANID - Read: bytes 12 and 13 */
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/* First byte - should be 0x10 */
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#define TEA5767_MANID_VERSION_MASK 0xf0 /* Version = 1 */
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#define TEA5767_MANID_ID_MSB_MASK 0x0f /* Manufacurer ID - should be 0 */
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/* Second byte - Should be 0x2b */
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#define TEA5767_MANID_ID_LSB_MASK 0xfe /* Manufacturer ID - should be 0x15 */
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#define TEA5767_MANID_IDAV 0x01 /* 1 = Chip has ID, 0 = Chip has no ID */
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/* Chip ID - Read: bytes 14 and 15 */
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/* First byte - should be 0x57 */
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/* Second byte - should be 0x61 */
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/*****************************************************************************/
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static void set_tv_freq(struct i2c_client *c, unsigned int freq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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tuner_warn("This tuner doesn't support TV freq.\n");
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}
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#define FREQ_OFFSET 0 /* for TEA5767, it is 700 to give the right freq */
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static void tea5761_status_dump(unsigned char *buffer)
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{
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unsigned int div, frq;
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div = ((buffer[2] & 0x3f) << 8) | buffer[3];
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frq = 1000 * (div * 32768 / 1000 + FREQ_OFFSET + 225) / 4; /* Freq in KHz */
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printk(PREFIX "Frequency %d.%03d KHz (divider = 0x%04x)\n",
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frq / 1000, frq % 1000, div);
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}
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/* Freq should be specifyed at 62.5 Hz */
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static void set_radio_freq(struct i2c_client *c, unsigned int frq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 };
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unsigned div;
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int rc;
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tuner_dbg (PREFIX "radio freq counter %d\n", frq);
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if (t->mode == T_STANDBY) {
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tuner_dbg("TEA5761 set to standby mode\n");
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buffer[5] |= TEA5761_TNCTRL_MU;
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} else {
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buffer[4] |= TEA5761_TNCTRL_PUPD_0;
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}
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if (t->audmode == V4L2_TUNER_MODE_MONO) {
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tuner_dbg("TEA5761 set to mono\n");
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buffer[5] |= TEA5761_TNCTRL_MST;
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;
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} else {
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tuner_dbg("TEA5761 set to stereo\n");
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}
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div = (1000 * (frq * 4 / 16 + 700 + 225) ) >> 15;
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buffer[1] = (div >> 8) & 0x3f;
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buffer[2] = div & 0xff;
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if (tuner_debug)
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tea5761_status_dump(buffer);
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if (7 != (rc = i2c_master_send(c, buffer, 7)))
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tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
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}
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static int tea5761_signal(struct i2c_client *c)
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{
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unsigned char buffer[16];
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int rc;
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struct tuner *t = i2c_get_clientdata(c);
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memset(buffer, 0, sizeof(buffer));
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if (16 != (rc = i2c_master_recv(c, buffer, 16)))
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tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
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return ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
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}
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static int tea5761_stereo(struct i2c_client *c)
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{
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unsigned char buffer[16];
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int rc;
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struct tuner *t = i2c_get_clientdata(c);
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memset(buffer, 0, sizeof(buffer));
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if (16 != (rc = i2c_master_recv(c, buffer, 16)))
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tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
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rc = buffer[9] & TEA5761_TUNCHECK_STEREO;
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tuner_dbg("TEA5761 radio ST GET = %02x\n", rc);
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return (rc ? V4L2_TUNER_SUB_STEREO : 0);
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}
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int tea5761_autodetection(struct i2c_client *c)
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{
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unsigned char buffer[16];
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int rc;
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struct tuner *t = i2c_get_clientdata(c);
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if (16 != (rc = i2c_master_recv(c, buffer, 16))) {
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tuner_warn("it is not a TEA5761. Received %i chars.\n", rc);
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return EINVAL;
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}
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if (!((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061))) {
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tuner_warn("Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n",buffer[13],buffer[14],buffer[15]);
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return EINVAL;
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}
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tuner_warn("TEA5761 detected.\n");
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return 0;
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}
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static struct tuner_operations tea5761_tuner_ops = {
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.set_tv_freq = set_tv_freq,
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.set_radio_freq = set_radio_freq,
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.has_signal = tea5761_signal,
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.is_stereo = tea5761_stereo,
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};
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int tea5761_tuner_init(struct i2c_client *c)
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{
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struct tuner *t = i2c_get_clientdata(c);
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if (tea5761_autodetection(c) == EINVAL)
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return EINVAL;
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tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5761HN FM Radio");
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strlcpy(c->name, "tea5761", sizeof(c->name));
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memcpy(&t->ops, &tea5761_tuner_ops, sizeof(struct tuner_operations));
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return (0);
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}
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