| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mauro Carvalho Chehab | 1307 | 67.09% | 12 | 35.29% |
| Michael Ira Krufky | 536 | 27.52% | 8 | 23.53% |
| Linus Torvalds (pre-git) | 56 | 2.87% | 3 | 8.82% |
| Gerd Knorr | 29 | 1.49% | 2 | 5.88% |
| Hans Verkuil | 12 | 0.62% | 3 | 8.82% |
| Linus Torvalds | 5 | 0.26% | 3 | 8.82% |
| Andrew Morton | 1 | 0.05% | 1 | 2.94% |
| Max Kellermann | 1 | 0.05% | 1 | 2.94% |
| Julia Lawall | 1 | 0.05% | 1 | 2.94% |
| Total | 1948 | 34 |
// SPDX-License-Identifier: GPL-2.0 // For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview // I2C address is always 0xC0. // // Copyright (c) 2005 Mauro Carvalho Chehab <mchehab@kernel.org> // // tea5767 autodetection thanks to Torsten Seeboth and Atsushi Nakagawa // from their contributions on DScaler. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/i2c.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/videodev2.h> #include "tuner-i2c.h" #include "tea5767.h" static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "enable verbose debug messages"); /*****************************************************************************/ struct tea5767_priv { struct tuner_i2c_props i2c_props; u32 frequency; struct tea5767_ctrl ctrl; }; /*****************************************************************************/ /****************************** * Write mode register values * ******************************/ /* First register */ #define TEA5767_MUTE 0x80 /* Mutes output */ #define TEA5767_SEARCH 0x40 /* Activates station search */ /* Bits 0-5 for divider MSB */ /* Second register */ /* Bits 0-7 for divider LSB */ /* Third register */ /* Station search from botton to up */ #define TEA5767_SEARCH_UP 0x80 /* Searches with ADC output = 10 */ #define TEA5767_SRCH_HIGH_LVL 0x60 /* Searches with ADC output = 10 */ #define TEA5767_SRCH_MID_LVL 0x40 /* Searches with ADC output = 5 */ #define TEA5767_SRCH_LOW_LVL 0x20 /* if on, div=4*(Frf+Fif)/Fref otherwise, div=4*(Frf-Fif)/Freq) */ #define TEA5767_HIGH_LO_INJECT 0x10 /* Disable stereo */ #define TEA5767_MONO 0x08 /* Disable right channel and turns to mono */ #define TEA5767_MUTE_RIGHT 0x04 /* Disable left channel and turns to mono */ #define TEA5767_MUTE_LEFT 0x02 #define TEA5767_PORT1_HIGH 0x01 /* Fourth register */ #define TEA5767_PORT2_HIGH 0x80 /* Chips stops working. Only I2C bus remains on */ #define TEA5767_STDBY 0x40 /* Japan freq (76-108 MHz. If disabled, 87.5-108 MHz */ #define TEA5767_JAPAN_BAND 0x20 /* Unselected means 32.768 KHz freq as reference. Otherwise Xtal at 13 MHz */ #define TEA5767_XTAL_32768 0x10 /* Cuts weak signals */ #define TEA5767_SOFT_MUTE 0x08 /* Activates high cut control */ #define TEA5767_HIGH_CUT_CTRL 0x04 /* Activates stereo noise control */ #define TEA5767_ST_NOISE_CTL 0x02 /* If activate PORT 1 indicates SEARCH or else it is used as PORT1 */ #define TEA5767_SRCH_IND 0x01 /* Fifth register */ /* By activating, it will use Xtal at 13 MHz as reference for divider */ #define TEA5767_PLLREF_ENABLE 0x80 /* By activating, deemphasis=50, or else, deemphasis of 50us */ #define TEA5767_DEEMPH_75 0X40 /***************************** * Read mode register values * *****************************/ /* First register */ #define TEA5767_READY_FLAG_MASK 0x80 #define TEA5767_BAND_LIMIT_MASK 0X40 /* Bits 0-5 for divider MSB after search or preset */ /* Second register */ /* Bits 0-7 for divider LSB after search or preset */ /* Third register */ #define TEA5767_STEREO_MASK 0x80 #define TEA5767_IF_CNTR_MASK 0x7f /* Fourth register */ #define TEA5767_ADC_LEVEL_MASK 0xf0 /* should be 0 */ #define TEA5767_CHIP_ID_MASK 0x0f /* Fifth register */ /* Reserved for future extensions */ #define TEA5767_RESERVED_MASK 0xff /*****************************************************************************/ static void tea5767_status_dump(struct tea5767_priv *priv, unsigned char *buffer) { unsigned int div, frq; if (TEA5767_READY_FLAG_MASK & buffer[0]) tuner_info("Ready Flag ON\n"); else tuner_info("Ready Flag OFF\n"); if (TEA5767_BAND_LIMIT_MASK & buffer[0]) tuner_info("Tuner at band limit\n"); else tuner_info("Tuner not at band limit\n"); div = ((buffer[0] & 0x3f) << 8) | buffer[1]; switch (priv->ctrl.xtal_freq) { case TEA5767_HIGH_LO_13MHz: frq = (div * 50000 - 700000 - 225000) / 4; /* Freq in KHz */ break; case TEA5767_LOW_LO_13MHz: frq = (div * 50000 + 700000 + 225000) / 4; /* Freq in KHz */ break; case TEA5767_LOW_LO_32768: frq = (div * 32768 + 700000 + 225000) / 4; /* Freq in KHz */ break; case TEA5767_HIGH_LO_32768: default: frq = (div * 32768 - 700000 - 225000) / 4; /* Freq in KHz */ break; } buffer[0] = (div >> 8) & 0x3f; buffer[1] = div & 0xff; tuner_info("Frequency %d.%03d KHz (divider = 0x%04x)\n", frq / 1000, frq % 1000, div); if (TEA5767_STEREO_MASK & buffer[2]) tuner_info("Stereo\n"); else tuner_info("Mono\n"); tuner_info("IF Counter = %d\n", buffer[2] & TEA5767_IF_CNTR_MASK); tuner_info("ADC Level = %d\n", (buffer[3] & TEA5767_ADC_LEVEL_MASK) >> 4); tuner_info("Chip ID = %d\n", (buffer[3] & TEA5767_CHIP_ID_MASK)); tuner_info("Reserved = 0x%02x\n", (buffer[4] & TEA5767_RESERVED_MASK)); } /* Freq should be specifyed at 62.5 Hz */ static int set_radio_freq(struct dvb_frontend *fe, struct analog_parameters *params) { struct tea5767_priv *priv = fe->tuner_priv; unsigned int frq = params->frequency; unsigned char buffer[5]; unsigned div; int rc; tuner_dbg("radio freq = %d.%03d MHz\n", frq/16000,(frq/16)%1000); buffer[2] = 0; if (priv->ctrl.port1) buffer[2] |= TEA5767_PORT1_HIGH; if (params->audmode == V4L2_TUNER_MODE_MONO) { tuner_dbg("TEA5767 set to mono\n"); buffer[2] |= TEA5767_MONO; } else { tuner_dbg("TEA5767 set to stereo\n"); } buffer[3] = 0; if (priv->ctrl.port2) buffer[3] |= TEA5767_PORT2_HIGH; if (priv->ctrl.high_cut) buffer[3] |= TEA5767_HIGH_CUT_CTRL; if (priv->ctrl.st_noise) buffer[3] |= TEA5767_ST_NOISE_CTL; if (priv->ctrl.soft_mute) buffer[3] |= TEA5767_SOFT_MUTE; if (priv->ctrl.japan_band) buffer[3] |= TEA5767_JAPAN_BAND; buffer[4] = 0; if (priv->ctrl.deemph_75) buffer[4] |= TEA5767_DEEMPH_75; if (priv->ctrl.pllref) buffer[4] |= TEA5767_PLLREF_ENABLE; /* Rounds freq to next decimal value - for 62.5 KHz step */ /* frq = 20*(frq/16)+radio_frq[frq%16]; */ switch (priv->ctrl.xtal_freq) { case TEA5767_HIGH_LO_13MHz: tuner_dbg("radio HIGH LO inject xtal @ 13 MHz\n"); buffer[2] |= TEA5767_HIGH_LO_INJECT; div = (frq * (4000 / 16) + 700000 + 225000 + 25000) / 50000; break; case TEA5767_LOW_LO_13MHz: tuner_dbg("radio LOW LO inject xtal @ 13 MHz\n"); div = (frq * (4000 / 16) - 700000 - 225000 + 25000) / 50000; break; case TEA5767_LOW_LO_32768: tuner_dbg("radio LOW LO inject xtal @ 32,768 MHz\n"); buffer[3] |= TEA5767_XTAL_32768; /* const 700=4000*175 Khz - to adjust freq to right value */ div = ((frq * (4000 / 16) - 700000 - 225000) + 16384) >> 15; break; case TEA5767_HIGH_LO_32768: default: tuner_dbg("radio HIGH LO inject xtal @ 32,768 MHz\n"); buffer[2] |= TEA5767_HIGH_LO_INJECT; buffer[3] |= TEA5767_XTAL_32768; div = ((frq * (4000 / 16) + 700000 + 225000) + 16384) >> 15; break; } buffer[0] = (div >> 8) & 0x3f; buffer[1] = div & 0xff; if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); if (debug) { if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); else tea5767_status_dump(priv, buffer); } priv->frequency = frq * 125 / 2; return 0; } static int tea5767_read_status(struct dvb_frontend *fe, char *buffer) { struct tea5767_priv *priv = fe->tuner_priv; int rc; memset(buffer, 0, 5); if (5 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props, buffer, 5))) { tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); return -EREMOTEIO; } return 0; } static inline int tea5767_signal(struct dvb_frontend *fe, const char *buffer) { struct tea5767_priv *priv = fe->tuner_priv; int signal = ((buffer[3] & TEA5767_ADC_LEVEL_MASK) << 8); tuner_dbg("Signal strength: %d\n", signal); return signal; } static inline int tea5767_stereo(struct dvb_frontend *fe, const char *buffer) { struct tea5767_priv *priv = fe->tuner_priv; int stereo = buffer[2] & TEA5767_STEREO_MASK; tuner_dbg("Radio ST GET = %02x\n", stereo); return (stereo ? V4L2_TUNER_SUB_STEREO : 0); } static int tea5767_get_status(struct dvb_frontend *fe, u32 *status) { unsigned char buffer[5]; *status = 0; if (0 == tea5767_read_status(fe, buffer)) { if (tea5767_signal(fe, buffer)) *status = TUNER_STATUS_LOCKED; if (tea5767_stereo(fe, buffer)) *status |= TUNER_STATUS_STEREO; } return 0; } static int tea5767_get_rf_strength(struct dvb_frontend *fe, u16 *strength) { unsigned char buffer[5]; *strength = 0; if (0 == tea5767_read_status(fe, buffer)) *strength = tea5767_signal(fe, buffer); return 0; } static int tea5767_standby(struct dvb_frontend *fe) { unsigned char buffer[5]; struct tea5767_priv *priv = fe->tuner_priv; unsigned div, rc; div = (87500 * 4 + 700 + 225 + 25) / 50; /* Set frequency to 87.5 MHz */ buffer[0] = (div >> 8) & 0x3f; buffer[1] = div & 0xff; buffer[2] = TEA5767_PORT1_HIGH; buffer[3] = TEA5767_PORT2_HIGH | TEA5767_HIGH_CUT_CTRL | TEA5767_ST_NOISE_CTL | TEA5767_JAPAN_BAND | TEA5767_STDBY; buffer[4] = 0; if (5 != (rc = tuner_i2c_xfer_send(&priv->i2c_props, buffer, 5))) tuner_warn("i2c i/o error: rc == %d (should be 5)\n", rc); return 0; } int tea5767_autodetection(struct i2c_adapter* i2c_adap, u8 i2c_addr) { struct tuner_i2c_props i2c = { .adap = i2c_adap, .addr = i2c_addr }; unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; int rc; if ((rc = tuner_i2c_xfer_recv(&i2c, buffer, 7))< 5) { pr_warn("It is not a TEA5767. Received %i bytes.\n", rc); return -EINVAL; } /* If all bytes are the same then it's a TV tuner and not a tea5767 */ if (buffer[0] == buffer[1] && buffer[0] == buffer[2] && buffer[0] == buffer[3] && buffer[0] == buffer[4]) { pr_warn("All bytes are equal. It is not a TEA5767\n"); return -EINVAL; } /* Status bytes: * Byte 4: bit 3:1 : CI (Chip Identification) == 0 * bit 0 : internally set to 0 * Byte 5: bit 7:0 : == 0 */ if (((buffer[3] & 0x0f) != 0x00) || (buffer[4] != 0x00)) { pr_warn("Chip ID is not zero. It is not a TEA5767\n"); return -EINVAL; } return 0; } static void tea5767_release(struct dvb_frontend *fe) { kfree(fe->tuner_priv); fe->tuner_priv = NULL; } static int tea5767_get_frequency(struct dvb_frontend *fe, u32 *frequency) { struct tea5767_priv *priv = fe->tuner_priv; *frequency = priv->frequency; return 0; } static int tea5767_set_config (struct dvb_frontend *fe, void *priv_cfg) { struct tea5767_priv *priv = fe->tuner_priv; memcpy(&priv->ctrl, priv_cfg, sizeof(priv->ctrl)); return 0; } static const struct dvb_tuner_ops tea5767_tuner_ops = { .info = { .name = "tea5767", // Philips TEA5767HN FM Radio }, .set_analog_params = set_radio_freq, .set_config = tea5767_set_config, .sleep = tea5767_standby, .release = tea5767_release, .get_frequency = tea5767_get_frequency, .get_status = tea5767_get_status, .get_rf_strength = tea5767_get_rf_strength, }; struct dvb_frontend *tea5767_attach(struct dvb_frontend *fe, struct i2c_adapter* i2c_adap, u8 i2c_addr) { struct tea5767_priv *priv = NULL; priv = kzalloc(sizeof(struct tea5767_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 = "tea5767"; priv->ctrl.xtal_freq = TEA5767_HIGH_LO_32768; priv->ctrl.port1 = 1; priv->ctrl.port2 = 1; priv->ctrl.high_cut = 1; priv->ctrl.st_noise = 1; priv->ctrl.japan_band = 1; memcpy(&fe->ops.tuner_ops, &tea5767_tuner_ops, sizeof(struct dvb_tuner_ops)); tuner_info("type set to %s\n", "Philips TEA5767HN FM Radio"); return fe; } EXPORT_SYMBOL_GPL(tea5767_attach); EXPORT_SYMBOL_GPL(tea5767_autodetection); MODULE_DESCRIPTION("Philips TEA5767 FM tuner driver"); MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>"); MODULE_LICENSE("GPL v2");
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