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341 lines
8.6 KiB
341 lines
8.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// For Philips TEA5761 FM Chip |
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// I2C address is always 0x20 (0x10 at 7-bit mode). |
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// |
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// Copyright (c) 2005-2007 Mauro Carvalho Chehab <[email protected]> |
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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. 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. 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 void 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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} |
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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 const 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 <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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