| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mauro Carvalho Chehab | 815 | 61.28% | 7 | 36.84% |
| Michael Ira Krufky | 508 | 38.20% | 8 | 42.11% |
| Tejun Heo | 3 | 0.23% | 1 | 5.26% |
| Marcin Ślusarz | 2 | 0.15% | 1 | 5.26% |
| Julia Lawall | 1 | 0.08% | 1 | 5.26% |
| Hans Verkuil | 1 | 0.08% | 1 | 5.26% |
| Total | 1330 | 19 |
// SPDX-License-Identifier: GPL-2.0 // For Philips TEA5761 FM Chip // I2C address is always 0x20 (0x10 at 7-bit mode). // // Copyright (c) 2005-2007 Mauro Carvalho Chehab <mchehab@kernel.org> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/videodev2.h> #include <media/tuner.h> #include "tuner-i2c.h" #include "tea5761.h" static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "enable verbose debug messages"); struct tea5761_priv { struct tuner_i2c_props i2c_props; u32 frequency; bool standby; }; /*****************************************************************************/ /*************************** * 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 */ /*****************************************************************************/ #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(KERN_INFO "tea5761: Frequency %d.%03d KHz (divider = 0x%04x)\n", frq / 1000, frq % 1000, div); } /* Freq should be specifyed at 62.5 Hz */ static int __set_radio_freq(struct dvb_frontend *fe, unsigned int freq, bool mono) { struct tea5761_priv *priv = fe->tuner_priv; unsigned int frq = freq; unsigned char buffer[7] = {0, 0, 0, 0, 0, 0, 0 }; unsigned div; int rc; tuner_dbg("radio freq counter %d\n", frq); if (priv->standby) { tuner_dbg("TEA5761 set to standby mode\n"); buffer[5] |= TEA5761_TNCTRL_MU; } else { buffer[4] |= TEA5761_TNCTRL_PUPD_0; } if (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 (debug) tea5761_status_dump(buffer); if (7 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 7))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); priv->frequency = frq * 125 / 2; return 0; } static int set_radio_freq(struct dvb_frontend *fe, struct analog_parameters *params) { struct tea5761_priv *priv = fe->analog_demod_priv; priv->standby = false; return __set_radio_freq(fe, params->frequency, params->audmode == V4L2_TUNER_MODE_MONO); } static int set_radio_sleep(struct dvb_frontend *fe) { struct tea5761_priv *priv = fe->analog_demod_priv; priv->standby = true; return __set_radio_freq(fe, priv->frequency, false); } static int tea5761_read_status(struct dvb_frontend *fe, char *buffer) { struct tea5761_priv *priv = fe->tuner_priv; int rc; memset(buffer, 0, 16); if (16 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 16))) { tuner_warn("i2c i/o error: rc == %d (should be 16)\n", rc); return -EREMOTEIO; } return 0; } static inline int tea5761_signal(struct dvb_frontend *fe, const char *buffer) { struct tea5761_priv *priv = fe->tuner_priv; int signal = ((buffer[9] & TEA5761_TUNCHECK_LEV_MASK) << (13 - 4)); tuner_dbg("Signal strength: %d\n", signal); return signal; } static inline int tea5761_stereo(struct dvb_frontend *fe, const char *buffer) { struct tea5761_priv *priv = fe->tuner_priv; int stereo = buffer[9] & TEA5761_TUNCHECK_STEREO; tuner_dbg("Radio ST GET = %02x\n", stereo); return (stereo ? V4L2_TUNER_SUB_STEREO : 0); } static int tea5761_get_status(struct dvb_frontend *fe, u32 *status) { unsigned char buffer[16]; *status = 0; if (0 == tea5761_read_status(fe, buffer)) { if (tea5761_signal(fe, buffer)) *status = TUNER_STATUS_LOCKED; if (tea5761_stereo(fe, buffer)) *status |= TUNER_STATUS_STEREO; } return 0; } static int tea5761_get_rf_strength(struct dvb_frontend *fe, u16 *strength) { unsigned char buffer[16]; *strength = 0; if (0 == tea5761_read_status(fe, buffer)) *strength = tea5761_signal(fe, buffer); return 0; } int tea5761_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr) { unsigned char buffer[16]; int rc; struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr }; if (16 != (rc = tuner_i2c_xfer_recv(&i2c, buffer, 16))) { printk(KERN_WARNING "it is not a TEA5761. Received %i chars.\n", rc); return -EINVAL; } if ((buffer[13] != 0x2b) || (buffer[14] != 0x57) || (buffer[15] != 0x061)) { printk(KERN_WARNING "Manufacturer ID= 0x%02x, Chip ID = %02x%02x. It is not a TEA5761\n", buffer[13], buffer[14], buffer[15]); return -EINVAL; } printk(KERN_WARNING "tea5761: TEA%02x%02x detected. Manufacturer ID= 0x%02x\n", buffer[14], buffer[15], buffer[13]); return 0; } static void tea5761_release(struct dvb_frontend *fe) { kfree(fe->tuner_priv); fe->tuner_priv = NULL; } static int tea5761_get_frequency(struct dvb_frontend *fe, u32 *frequency) { struct tea5761_priv *priv = fe->tuner_priv; *frequency = priv->frequency; return 0; } static const struct dvb_tuner_ops tea5761_tuner_ops = { .info = { .name = "tea5761", // Philips TEA5761HN FM Radio }, .set_analog_params = set_radio_freq, .sleep = set_radio_sleep, .release = tea5761_release, .get_frequency = tea5761_get_frequency, .get_status = tea5761_get_status, .get_rf_strength = tea5761_get_rf_strength, }; struct dvb_frontend *tea5761_attach(struct dvb_frontend *fe, struct i2c_adapter* i2c_adap, u8 i2c_addr) { struct tea5761_priv *priv = NULL; if (tea5761_autodetection(i2c_adap, i2c_addr) != 0) return NULL; priv = kzalloc(sizeof(struct tea5761_priv), GFP_KERNEL); if (priv == NULL) return NULL; fe->tuner_priv = priv; priv->i2c_props.addr = i2c_addr; priv->i2c_props.adap = i2c_adap; priv->i2c_props.name = "tea5761"; memcpy(&fe->ops.tuner_ops, &tea5761_tuner_ops, sizeof(struct dvb_tuner_ops)); tuner_info("type set to %s\n", "Philips TEA5761HN FM Radio"); return fe; } EXPORT_SYMBOL_GPL(tea5761_attach); EXPORT_SYMBOL_GPL(tea5761_autodetection); MODULE_DESCRIPTION("Philips TEA5761 FM tuner driver"); MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>"); MODULE_LICENSE("GPL v2");
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