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https://github.com/torvalds/linux
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2d351df443
tda9887 used to use the T_STANDBY type internally, while tea5761 used it to put the device to sleep. Fix the code for it to work properly with the tuner core changes and remove this flag from tuner.h. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
349 lines
8.7 KiB
C
349 lines
8.7 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/slab.h>
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#include <linux/delay.h>
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#include <linux/videodev2.h>
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#include <media/tuner.h>
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#include "tuner-i2c.h"
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#include "tea5761.h"
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "enable verbose debug messages");
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struct tea5761_priv {
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struct tuner_i2c_props i2c_props;
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u32 frequency;
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bool standby;
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};
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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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#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(KERN_INFO "tea5761: 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 int __set_radio_freq(struct dvb_frontend *fe,
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unsigned int freq,
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bool mono)
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{
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struct tea5761_priv *priv = fe->tuner_priv;
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unsigned int frq = freq;
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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("radio freq counter %d\n", frq);
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if (priv->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 (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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} 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 (debug)
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tea5761_status_dump(buffer);
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if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7)))
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tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc);
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priv->frequency = frq * 125 / 2;
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return 0;
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}
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static int set_radio_freq(struct dvb_frontend *fe,
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struct analog_parameters *params)
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{
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struct tea5761_priv *priv = fe->analog_demod_priv;
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priv->standby = false;
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return __set_radio_freq(fe, params->frequency,
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params->audmode == V4L2_TUNER_MODE_MONO);
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}
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static int set_radio_sleep(struct dvb_frontend *fe)
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{
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struct tea5761_priv *priv = fe->analog_demod_priv;
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priv->standby = true;
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return __set_radio_freq(fe, priv->frequency, false);
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}
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static int tea5761_read_status(struct dvb_frontend *fe, char *buffer)
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{
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struct tea5761_priv *priv = fe->tuner_priv;
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int rc;
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memset(buffer, 0, 16);
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if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) {
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tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc);
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return -EREMOTEIO;
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}
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return 0;
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}
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static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer)
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{
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struct tea5761_priv *priv = fe->tuner_priv;
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int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4));
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tuner_dbg("Signal strength: %d\n", signal);
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return signal;
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}
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static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer)
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{
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struct tea5761_priv *priv = fe->tuner_priv;
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int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO;
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tuner_dbg("Radio ST GET = %02x\n", stereo);
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return (stereo ? V4L2_TUNER_SUB_STEREO : 0);
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}
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static int tea5761_get_status(struct dvb_frontend *fe, u32 *status)
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{
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unsigned char buffer[16];
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*status = 0;
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if (0 == tea5761_read_status(fe, buffer)) {
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if (tea5761_signal(fe, buffer))
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*status = TUNER_STATUS_LOCKED;
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if (tea5761_stereo(fe, buffer))
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*status |= TUNER_STATUS_STEREO;
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}
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return 0;
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}
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static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
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{
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unsigned char buffer[16];
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*strength = 0;
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if (0 == tea5761_read_status(fe, buffer))
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*strength = tea5761_signal(fe, buffer);
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return 0;
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}
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int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr)
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{
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unsigned char buffer[16];
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int rc;
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struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr };
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if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) {
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printk(KERN_WARNING "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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printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x."
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" It is not a TEA5761\n",
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buffer[13], buffer[14], buffer[15]);
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return -EINVAL;
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}
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printk(KERN_WARNING "tea5761: TEA%02x%02x detected. "
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"Manufacturer ID= 0x%02x\n",
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buffer[14], buffer[15], buffer[13]);
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return 0;
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}
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static int tea5761_release(struct dvb_frontend *fe)
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{
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kfree(fe->tuner_priv);
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fe->tuner_priv = NULL;
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return 0;
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}
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static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct tea5761_priv *priv = fe->tuner_priv;
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*frequency = priv->frequency;
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return 0;
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}
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static struct dvb_tuner_ops tea5761_tuner_ops = {
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.info = {
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.name = "tea5761", // Philips TEA5761HN FM Radio
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},
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.set_analog_params = set_radio_freq,
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.sleep = set_radio_sleep,
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.release = tea5761_release,
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.get_frequency = tea5761_get_frequency,
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.get_status = tea5761_get_status,
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.get_rf_strength = tea5761_get_rf_strength,
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};
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struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe,
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struct i2c_adapter* i2c_adap,
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u8 i2c_addr)
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{
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struct tea5761_priv *priv = NULL;
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if (tea5761_autodetection(i2c_adap, i2c_addr) != 0)
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return NULL;
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priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL);
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if (priv == NULL)
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return NULL;
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fe->tuner_priv = priv;
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priv->i2c_props.addr = i2c_addr;
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priv->i2c_props.adap = i2c_adap;
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priv->i2c_props.name = "tea5761";
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memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio");
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return fe;
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}
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EXPORT_SYMBOL_GPL(tea5761_attach);
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EXPORT_SYMBOL_GPL(tea5761_autodetection);
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MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver");
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MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
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MODULE_LICENSE("GPL");
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