350 lines
8.2 KiB
C
350 lines
8.2 KiB
C
/* $NetBSD: tea5767.c,v 1.2 2019/12/23 20:49:09 thorpej Exp $ */
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/*-
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* Copyright (c) 2018 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Karuna Grewal.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tea5767.c,v 1.2 2019/12/23 20:49:09 thorpej Exp $");
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <sys/systm.h>
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#include <dev/i2c/i2cvar.h>
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#include <sys/ioctl.h>
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#include <sys/radioio.h>
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#include <dev/radio_if.h>
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#include "tea5767reg.h"
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struct tea5767_tune {
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int mute;
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uint32_t freq;
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int stereo;
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bool is_pll_set;
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bool is_xtal_set;
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bool is_force_srch;
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int fm_band; /* Set = JAPAN. */
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int lock;
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int adc_stop_level;
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};
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struct tea5767_softc {
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device_t sc_dev;
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/* Tunable properties. */
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struct tea5767_tune tune;
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/* I2C bus controller. */
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i2c_tag_t sc_i2c_tag;
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/* Device addr on I2C. */
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i2c_addr_t sc_addr;
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/* Device capabilities. */
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uint32_t caps;
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};
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static int tea5767_get_info(void *, struct radio_info *);
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static int tea5767_set_info(void *, struct radio_info *);
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static int tea5767_search(void *, int);
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static int tea5767_match(device_t, cfdata_t, void *);
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static void tea5767_attach(device_t, device_t, void *);
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static const struct radio_hw_if tea5767_hw_if = {
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NULL,
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NULL,
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tea5767_get_info,
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tea5767_set_info,
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tea5767_search
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};
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static const uint32_t tea5767_common_caps =
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RADIO_CAPS_DETECT_STEREO |
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RADIO_CAPS_SET_MONO |
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RADIO_CAPS_HW_SEARCH |
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RADIO_CAPS_LOCK_SENSITIVITY;
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CFATTACH_DECL_NEW(tea5767radio, sizeof(struct tea5767_softc), tea5767_match,
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tea5767_attach, NULL, NULL);
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static int
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tea5767_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct i2c_attach_args *ia = aux;
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if (ia->ia_addr == TEA5767_ADDR)
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return I2C_MATCH_ADDRESS_ONLY;
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return 0;
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}
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static void
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tea5767_attach(device_t parent, device_t self, void *aux)
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{
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struct tea5767_softc *sc = device_private(self);
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int tea5767_flags = device_cfdata(self)->cf_flags;
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struct i2c_attach_args *ia = aux;
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aprint_normal(": Philips/NXP TEA5767 Radio\n");
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aprint_naive(": FM radio\n");
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sc->sc_dev = self;
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sc->tune.mute = 0;
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sc->tune.freq = MIN_FM_FREQ;
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sc->tune.stereo = 1;
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sc->tune.is_pll_set = false;
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sc->tune.is_xtal_set = false;
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sc->tune.is_force_srch = false;
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sc->sc_i2c_tag = ia->ia_tag;
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sc->sc_addr = ia->ia_addr;
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if (tea5767_flags & TEA5767_PLL_FLAG)
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sc->tune.is_pll_set = true;
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if (tea5767_flags & TEA5767_XTAL_FLAG)
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sc->tune.is_xtal_set = true;
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if (tea5767_flags & TEA5767_JAPAN_FM_FLAG)
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sc->tune.fm_band = 1;
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if (tea5767_flags & TEA5767_FORCE_SRCH_FLAG)
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sc->tune.is_force_srch = true;
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sc->caps = tea5767_common_caps;
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/*
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* Check the quality of crystal and disable hardware search if
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* necessary.
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*/
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if (!tea5767_if_check(sc) && !(sc->tune.is_force_srch))
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sc->caps &= ~RADIO_CAPS_HW_SEARCH;
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radio_attach_mi(&tea5767_hw_if, sc, self);
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}
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static int
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tea5767_write(struct tea5767_softc *sc, uint8_t *reg)
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{
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int exec_result;
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if (iic_acquire_bus(sc->sc_i2c_tag, 0)) {
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device_printf(sc->sc_dev, "bus acquiration failed.\n");
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return 1;
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}
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exec_result = iic_exec(sc->sc_i2c_tag, I2C_OP_WRITE_WITH_STOP,
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sc->sc_addr, NULL, 0, reg, 5, 0);
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if (exec_result) {
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iic_release_bus(sc->sc_i2c_tag, 0);
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device_printf(sc->sc_dev, "write operation failed %d.\n",
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exec_result);
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return 1;
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}
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iic_release_bus(sc->sc_i2c_tag, 0);
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return 0;
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}
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static int
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tea5767_read(struct tea5767_softc *sc, uint8_t *reg)
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{
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int exec_result;
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if (iic_acquire_bus(sc->sc_i2c_tag, 0)) {
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device_printf(sc->sc_dev, "bus acquiration failed.\n");
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return 1;
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}
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exec_result = iic_exec(sc->sc_i2c_tag, I2C_OP_READ_WITH_STOP,
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sc->sc_addr, NULL, 0, reg, 5, 0);
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if (exec_result) {
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iic_release_bus(sc->sc_i2c_tag, 0);
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device_printf(sc->sc_dev, "read operation failed.\n");
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return 1;
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}
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iic_release_bus(sc->sc_i2c_tag, 0);
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return 0;
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}
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/*
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* Calculate the PLL word.
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* TODO: Extend this calculation to do high side injection as well
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* (add fields to tea5767_tune).
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*/
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static void
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tea5767_freq_to_pll(struct tea5767_tune tune, uint8_t *buf)
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{
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uint16_t pll_word = 0;
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if (!tune.is_pll_set && !tune.is_xtal_set)
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pll_word = 4 * (tune.freq - 225) * 1000 / 50000;
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else if (!tune.is_pll_set && tune.is_xtal_set) {
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pll_word = 4 * (tune.freq - 225) * 1000 / 32768;
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buf[3] = TEA5767_XTAL;
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}
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else {
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pll_word = 4 * (tune.freq - 225) * 1000 / 50000;
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buf[4] |= TEA5767_PLLREF;
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}
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buf[1] = pll_word & 0xff;
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buf[0] = (pll_word>>8) & 0x3f;
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}
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static void
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tea5767_set_properties(struct tea5767_softc *sc, uint8_t *reg)
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{
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memset(reg,0,5);
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tea5767_freq_to_pll(sc->tune, reg);
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if (sc->tune.mute) {
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reg[0] |= TEA5767_MUTE;
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reg[2] |=TEA5767_MUTE_R | TEA5767_MUTE_L;
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}
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reg[3] |= TEA5767_SNC;
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if (sc->tune.stereo == 0)
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reg[2] |= TEA5767_MONO;
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if(sc->tune.fm_band)
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reg[3] |= TEA5767_FM_BAND;
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}
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static bool
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tea5767_if_check(struct tea5767_soft *sc)
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{
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uint8_t reg[5];
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tea5767_set_properties(sc, reg);
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tea5767_write(sc, reg);
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memset(reg,0,5);
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delay(1000);
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tea5767_read(sc,reg);
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if ((reg[2] & 0x7f) == 0x37)
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return true;
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return false;
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}
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static void
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tea5767_pll_to_freq(struct tea5767_tune *tune, uint8_t *buf)
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{
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int pll_word = buf[1] | (buf[0] & 0x3f) << 8;
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if (!tune->is_pll_set && !tune->is_xtal_set)
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tune->freq = pll_word * 50 / 4 + 225;
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else if (!tune->is_pll_set && tune->is_xtal_set)
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tune->freq = pll_word * 32768 / 4000 + 225;
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else
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tune->freq = pll_word * 50 / 4 + 225;
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}
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static int
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tea5767_get_info(void *v, struct radio_info *ri)
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{
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struct tea5767_softc *sc = v;
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uint8_t reg[5];
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tea5767_read(sc, reg);
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tea5767_pll_to_freq(&sc->tune, reg);
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ri->mute = sc->tune.mute;
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ri->stereo = sc->tune.stereo;
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ri->freq = sc->tune.freq;
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ri->lock = sc->tune.lock;
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ri->caps = sc->caps;
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return 0;
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}
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static int
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tea5767_set_info(void *v, struct radio_info *ri)
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{
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struct tea5767_softc *sc = v;
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int adc_conversion;
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uint8_t reg[5];
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sc->tune.mute = ri->mute;
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sc->tune.stereo = ri->stereo;
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sc->tune.freq = ri->freq;
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sc->tune.lock = ri->lock;
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adc_conversion = (ri->lock-60) * 3 / 30;
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switch(adc_conversion) {
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case 0: sc->tune.adc_stop_level = TEA5767_SSL_3;
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break;
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case 1: sc->tune.adc_stop_level = TEA5767_SSL_2;
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break;
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case 2: sc->tune.adc_stop_level = TEA5767_SSL_1;
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break;
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}
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tea5767_set_properties(sc, reg);
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tea5767_write(sc, reg);
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return 0;
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}
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static int
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tea5767_search(void *v, int dir)
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{
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struct tea5767_softc *sc = v;
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uint8_t reg[5];
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/* Increment frequency to search for the next frequency. */
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sc->tune.freq = sc->tune.freq >= 107500 ? 87500 : sc->tune.freq + 100;
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tea5767_set_properties(sc, reg);
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/* Activate autonomous search. */
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reg[0] |= TEA5767_SEARCH;
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/*
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* If dir 1 => search up, if dir 0 => search down.
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*/
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if (dir)
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reg[2] |= TEA5767_SUD;
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reg[2] |= sc->tune.adc_stop_level; /* Stop level for search. */
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tea5767_write(sc, reg);
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memset(reg, 0, 5);
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while (tea5767_read(sc, reg), !(reg[0] & TEA5767_READY_FLAG)) {
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kpause("teasrch", true, hz/100, NULL);
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}
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return 0;
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}
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