680 lines
16 KiB
C
680 lines
16 KiB
C
/*-
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* Copyright (c) 2016 Oleksandr Tymoshenko <gonzo@FreeBSD.org>
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/gpio.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/proc.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <dev/acpica/acpivar.h>
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#include <dev/gpio/gpiobusvar.h>
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#include "gpio_if.h"
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/**
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* Macros for driver mutex locking
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*/
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#define BYTGPIO_LOCK(_sc) mtx_lock_spin(&(_sc)->sc_mtx)
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#define BYTGPIO_UNLOCK(_sc) mtx_unlock_spin(&(_sc)->sc_mtx)
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#define BYTGPIO_LOCK_INIT(_sc) \
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mtx_init(&_sc->sc_mtx, device_get_nameunit((_sc)->sc_dev), \
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"bytgpio", MTX_SPIN)
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#define BYTGPIO_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx)
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#define BYTGPIO_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
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#define BYTGPIO_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_NOTOWNED)
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struct pinmap_info {
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int reg;
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int pad_func;
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};
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/* Ignore function check, no info is available at the moment */
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#define PADCONF_FUNC_ANY -1
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#define GPIO_PIN_MAP(r, f) { .reg = (r), .pad_func = (f) }
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struct bytgpio_softc {
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ACPI_HANDLE sc_handle;
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device_t sc_dev;
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device_t sc_busdev;
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struct mtx sc_mtx;
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int sc_mem_rid;
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struct resource *sc_mem_res;
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int sc_npins;
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const char* sc_bank_prefix;
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const struct pinmap_info *sc_pinpad_map;
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/* List of current functions for pads shared by GPIO */
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int *sc_pad_funcs;
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};
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static int bytgpio_probe(device_t dev);
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static int bytgpio_attach(device_t dev);
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static int bytgpio_detach(device_t dev);
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#define SCORE_UID 1
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#define SCORE_BANK_PREFIX "GPIO_S0_SC"
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const struct pinmap_info bytgpio_score_pins[] = {
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GPIO_PIN_MAP(85, 0),
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GPIO_PIN_MAP(89, 0),
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GPIO_PIN_MAP(93, 0),
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GPIO_PIN_MAP(96, 0),
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GPIO_PIN_MAP(99, 0),
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GPIO_PIN_MAP(102, 0),
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GPIO_PIN_MAP(98, 0),
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GPIO_PIN_MAP(101, 0),
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GPIO_PIN_MAP(34, 0),
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GPIO_PIN_MAP(37, 0),
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GPIO_PIN_MAP(36, 0),
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GPIO_PIN_MAP(38, 0),
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GPIO_PIN_MAP(39, 0),
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GPIO_PIN_MAP(35, 0),
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GPIO_PIN_MAP(40, 0),
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GPIO_PIN_MAP(84, 0),
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GPIO_PIN_MAP(62, 0),
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GPIO_PIN_MAP(61, 0),
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GPIO_PIN_MAP(64, 0),
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GPIO_PIN_MAP(59, 0),
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GPIO_PIN_MAP(54, 0),
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GPIO_PIN_MAP(56, 0),
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GPIO_PIN_MAP(60, 0),
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GPIO_PIN_MAP(55, 0),
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GPIO_PIN_MAP(63, 0),
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GPIO_PIN_MAP(57, 0),
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GPIO_PIN_MAP(51, 0),
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GPIO_PIN_MAP(50, 0),
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GPIO_PIN_MAP(53, 0),
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GPIO_PIN_MAP(47, 0),
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GPIO_PIN_MAP(52, 0),
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GPIO_PIN_MAP(49, 0),
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GPIO_PIN_MAP(48, 0),
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GPIO_PIN_MAP(43, 0),
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GPIO_PIN_MAP(46, 0),
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GPIO_PIN_MAP(41, 0),
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GPIO_PIN_MAP(45, 0),
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GPIO_PIN_MAP(42, 0),
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GPIO_PIN_MAP(58, 0),
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GPIO_PIN_MAP(44, 0),
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GPIO_PIN_MAP(95, 0),
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GPIO_PIN_MAP(105, 0),
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GPIO_PIN_MAP(70, 0),
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GPIO_PIN_MAP(68, 0),
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GPIO_PIN_MAP(67, 0),
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GPIO_PIN_MAP(66, 0),
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GPIO_PIN_MAP(69, 0),
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GPIO_PIN_MAP(71, 0),
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GPIO_PIN_MAP(65, 0),
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GPIO_PIN_MAP(72, 0),
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GPIO_PIN_MAP(86, 0),
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GPIO_PIN_MAP(90, 0),
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GPIO_PIN_MAP(88, 0),
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GPIO_PIN_MAP(92, 0),
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GPIO_PIN_MAP(103, 0),
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GPIO_PIN_MAP(77, 0),
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GPIO_PIN_MAP(79, 0),
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GPIO_PIN_MAP(83, 0),
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GPIO_PIN_MAP(78, 0),
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GPIO_PIN_MAP(81, 0),
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GPIO_PIN_MAP(80, 0),
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GPIO_PIN_MAP(82, 0),
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GPIO_PIN_MAP(13, 0),
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GPIO_PIN_MAP(12, 0),
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GPIO_PIN_MAP(15, 0),
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GPIO_PIN_MAP(14, 0),
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GPIO_PIN_MAP(17, 0),
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GPIO_PIN_MAP(18, 0),
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GPIO_PIN_MAP(19, 0),
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GPIO_PIN_MAP(16, 0),
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GPIO_PIN_MAP(2, 0),
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GPIO_PIN_MAP(1, 0),
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GPIO_PIN_MAP(0, 0),
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GPIO_PIN_MAP(4, 0),
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GPIO_PIN_MAP(6, 0),
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GPIO_PIN_MAP(7, 0),
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GPIO_PIN_MAP(9, 0),
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GPIO_PIN_MAP(8, 0),
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GPIO_PIN_MAP(33, 0),
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GPIO_PIN_MAP(32, 0),
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GPIO_PIN_MAP(31, 0),
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GPIO_PIN_MAP(30, 0),
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GPIO_PIN_MAP(29, 0),
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GPIO_PIN_MAP(27, 0),
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GPIO_PIN_MAP(25, 0),
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GPIO_PIN_MAP(28, 0),
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GPIO_PIN_MAP(26, 0),
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GPIO_PIN_MAP(23, 0),
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GPIO_PIN_MAP(21, 0),
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GPIO_PIN_MAP(20, 0),
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GPIO_PIN_MAP(24, 0),
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GPIO_PIN_MAP(22, 0),
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GPIO_PIN_MAP(5, 1),
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GPIO_PIN_MAP(3, 1),
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GPIO_PIN_MAP(10, 0),
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GPIO_PIN_MAP(11, 0),
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GPIO_PIN_MAP(106, 0),
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GPIO_PIN_MAP(87, 0),
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GPIO_PIN_MAP(91, 0),
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GPIO_PIN_MAP(104, 0),
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GPIO_PIN_MAP(97, 0),
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GPIO_PIN_MAP(100, 0)
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};
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#define SCORE_PINS nitems(bytgpio_score_pins)
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#define NCORE_UID 2
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#define NCORE_BANK_PREFIX "GPIO_S0_NC"
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const struct pinmap_info bytgpio_ncore_pins[] = {
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GPIO_PIN_MAP(19, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(18, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(17, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(20, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(21, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(22, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(24, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(25, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(23, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(16, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(14, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(15, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(12, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(26, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(27, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(1, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(4, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(8, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(11, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(0, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(3, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(6, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(10, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(13, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(2, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(5, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(9, PADCONF_FUNC_ANY),
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GPIO_PIN_MAP(7, PADCONF_FUNC_ANY)
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};
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#define NCORE_PINS nitems(bytgpio_ncore_pins)
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#define SUS_UID 3
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#define SUS_BANK_PREFIX "GPIO_S5_"
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const struct pinmap_info bytgpio_sus_pins[] = {
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GPIO_PIN_MAP(29, 0),
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GPIO_PIN_MAP(33, 0),
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GPIO_PIN_MAP(30, 0),
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GPIO_PIN_MAP(31, 0),
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GPIO_PIN_MAP(32, 0),
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GPIO_PIN_MAP(34, 0),
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GPIO_PIN_MAP(36, 0),
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GPIO_PIN_MAP(35, 0),
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GPIO_PIN_MAP(38, 0),
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GPIO_PIN_MAP(37, 0),
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GPIO_PIN_MAP(18, 0),
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GPIO_PIN_MAP(7, 1),
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GPIO_PIN_MAP(11, 1),
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GPIO_PIN_MAP(20, 1),
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GPIO_PIN_MAP(17, 1),
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GPIO_PIN_MAP(1, 1),
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GPIO_PIN_MAP(8, 1),
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GPIO_PIN_MAP(10, 1),
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GPIO_PIN_MAP(19, 1),
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GPIO_PIN_MAP(12, 1),
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GPIO_PIN_MAP(0, 1),
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GPIO_PIN_MAP(2, 1),
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GPIO_PIN_MAP(23, 0),
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GPIO_PIN_MAP(39, 0),
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GPIO_PIN_MAP(28, 0),
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GPIO_PIN_MAP(27, 0),
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GPIO_PIN_MAP(22, 0),
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GPIO_PIN_MAP(21, 0),
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GPIO_PIN_MAP(24, 0),
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GPIO_PIN_MAP(25, 0),
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GPIO_PIN_MAP(26, 0),
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GPIO_PIN_MAP(51, 0),
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GPIO_PIN_MAP(56, 0),
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GPIO_PIN_MAP(54, 0),
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GPIO_PIN_MAP(49, 0),
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GPIO_PIN_MAP(55, 0),
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GPIO_PIN_MAP(48, 0),
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GPIO_PIN_MAP(57, 0),
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GPIO_PIN_MAP(50, 0),
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GPIO_PIN_MAP(58, 0),
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GPIO_PIN_MAP(52, 0),
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GPIO_PIN_MAP(53, 0),
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GPIO_PIN_MAP(59, 0),
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GPIO_PIN_MAP(40, 0)
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};
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#define SUS_PINS nitems(bytgpio_sus_pins)
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#define BYGPIO_PIN_REGISTER(sc, pin, r) ((sc)->sc_pinpad_map[(pin)].reg * 16 + (r))
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#define BYTGPIO_PCONF0 0x0000
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#define BYTGPIO_PCONF0_FUNC_MASK 7
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#define BYTGPIO_PAD_VAL 0x0008
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#define BYTGPIO_PAD_VAL_LEVEL (1 << 0)
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#define BYTGPIO_PAD_VAL_I_OUTPUT_ENABLED (1 << 1)
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#define BYTGPIO_PAD_VAL_I_INPUT_ENABLED (1 << 2)
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#define BYTGPIO_PAD_VAL_DIR_MASK (3 << 1)
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static inline uint32_t
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bytgpio_read_4(struct bytgpio_softc *sc, bus_size_t off)
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{
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return (bus_read_4(sc->sc_mem_res, off));
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}
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static inline void
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bytgpio_write_4(struct bytgpio_softc *sc, bus_size_t off,
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uint32_t val)
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{
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bus_write_4(sc->sc_mem_res, off, val);
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}
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static device_t
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bytgpio_get_bus(device_t dev)
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{
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struct bytgpio_softc *sc;
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sc = device_get_softc(dev);
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return (sc->sc_busdev);
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}
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static int
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bytgpio_pin_max(device_t dev, int *maxpin)
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{
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struct bytgpio_softc *sc;
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sc = device_get_softc(dev);
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*maxpin = sc->sc_npins - 1;
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return (0);
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}
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static int
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bytgpio_valid_pin(struct bytgpio_softc *sc, int pin)
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{
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if (pin >= sc->sc_npins || sc->sc_mem_res == NULL)
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return (EINVAL);
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return (0);
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}
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/*
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* Returns true if pad configured to be used as GPIO
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*/
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static bool
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bytgpio_pad_is_gpio(struct bytgpio_softc *sc, int pin)
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{
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if ((sc->sc_pinpad_map[pin].pad_func == PADCONF_FUNC_ANY) ||
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(sc->sc_pad_funcs[pin] == sc->sc_pinpad_map[pin].pad_func))
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return (true);
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else
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return (false);
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}
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static int
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bytgpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps)
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{
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struct bytgpio_softc *sc;
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sc = device_get_softc(dev);
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if (bytgpio_valid_pin(sc, pin) != 0)
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return (EINVAL);
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*caps = 0;
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if (bytgpio_pad_is_gpio(sc, pin))
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*caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT;
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return (0);
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}
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static int
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bytgpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
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{
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struct bytgpio_softc *sc;
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uint32_t reg, val;
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sc = device_get_softc(dev);
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if (bytgpio_valid_pin(sc, pin) != 0)
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return (EINVAL);
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*flags = 0;
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if (!bytgpio_pad_is_gpio(sc, pin))
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return (0);
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/* Get the current pin state */
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BYTGPIO_LOCK(sc);
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reg = BYGPIO_PIN_REGISTER(sc, pin, BYTGPIO_PAD_VAL);
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val = bytgpio_read_4(sc, reg);
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if ((val & BYTGPIO_PAD_VAL_I_OUTPUT_ENABLED) == 0)
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*flags |= GPIO_PIN_OUTPUT;
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/*
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* this bit can be cleared to read current output value
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* sou output bit takes precedense
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*/
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else if ((val & BYTGPIO_PAD_VAL_I_INPUT_ENABLED) == 0)
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*flags |= GPIO_PIN_INPUT;
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BYTGPIO_UNLOCK(sc);
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return (0);
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}
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static int
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bytgpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
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{
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struct bytgpio_softc *sc;
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uint32_t reg, val;
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uint32_t allowed;
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sc = device_get_softc(dev);
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if (bytgpio_valid_pin(sc, pin) != 0)
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return (EINVAL);
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if (bytgpio_pad_is_gpio(sc, pin))
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allowed = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT;
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else
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allowed = 0;
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/*
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* Only directtion flag allowed
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*/
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if (flags & ~allowed)
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return (EINVAL);
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/*
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* Not both directions simultaneously
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*/
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if ((flags & allowed) == allowed)
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return (EINVAL);
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/* Set the GPIO mode and state */
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BYTGPIO_LOCK(sc);
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reg = BYGPIO_PIN_REGISTER(sc, pin, BYTGPIO_PAD_VAL);
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val = bytgpio_read_4(sc, reg);
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val = val | BYTGPIO_PAD_VAL_DIR_MASK;
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if (flags & GPIO_PIN_INPUT)
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val = val & ~BYTGPIO_PAD_VAL_I_INPUT_ENABLED;
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if (flags & GPIO_PIN_OUTPUT)
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val = val & ~BYTGPIO_PAD_VAL_I_OUTPUT_ENABLED;
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bytgpio_write_4(sc, reg, val);
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BYTGPIO_UNLOCK(sc);
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return (0);
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}
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static int
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bytgpio_pin_getname(device_t dev, uint32_t pin, char *name)
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{
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struct bytgpio_softc *sc;
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sc = device_get_softc(dev);
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if (bytgpio_valid_pin(sc, pin) != 0)
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return (EINVAL);
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/* Set a very simple name */
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snprintf(name, GPIOMAXNAME, "%s%u", sc->sc_bank_prefix, pin);
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name[GPIOMAXNAME - 1] = '\0';
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return (0);
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}
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static int
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bytgpio_pin_set(device_t dev, uint32_t pin, unsigned int value)
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{
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struct bytgpio_softc *sc;
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uint32_t reg, val;
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sc = device_get_softc(dev);
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if (bytgpio_valid_pin(sc, pin) != 0)
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return (EINVAL);
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if (!bytgpio_pad_is_gpio(sc, pin))
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return (EINVAL);
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BYTGPIO_LOCK(sc);
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reg = BYGPIO_PIN_REGISTER(sc, pin, BYTGPIO_PAD_VAL);
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val = bytgpio_read_4(sc, reg);
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if (value == GPIO_PIN_LOW)
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val = val & ~BYTGPIO_PAD_VAL_LEVEL;
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else
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|
val = val | BYTGPIO_PAD_VAL_LEVEL;
|
|
bytgpio_write_4(sc, reg, val);
|
|
BYTGPIO_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bytgpio_pin_get(device_t dev, uint32_t pin, unsigned int *value)
|
|
{
|
|
struct bytgpio_softc *sc;
|
|
uint32_t reg, val;
|
|
|
|
sc = device_get_softc(dev);
|
|
if (bytgpio_valid_pin(sc, pin) != 0)
|
|
return (EINVAL);
|
|
/*
|
|
* Report non-GPIO pads as pin LOW
|
|
*/
|
|
if (!bytgpio_pad_is_gpio(sc, pin)) {
|
|
*value = GPIO_PIN_LOW;
|
|
return (0);
|
|
}
|
|
|
|
BYTGPIO_LOCK(sc);
|
|
reg = BYGPIO_PIN_REGISTER(sc, pin, BYTGPIO_PAD_VAL);
|
|
/*
|
|
* And read actual value
|
|
*/
|
|
val = bytgpio_read_4(sc, reg);
|
|
if (val & BYTGPIO_PAD_VAL_LEVEL)
|
|
*value = GPIO_PIN_HIGH;
|
|
else
|
|
*value = GPIO_PIN_LOW;
|
|
BYTGPIO_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bytgpio_pin_toggle(device_t dev, uint32_t pin)
|
|
{
|
|
struct bytgpio_softc *sc;
|
|
uint32_t reg, val;
|
|
|
|
sc = device_get_softc(dev);
|
|
if (bytgpio_valid_pin(sc, pin) != 0)
|
|
return (EINVAL);
|
|
|
|
if (!bytgpio_pad_is_gpio(sc, pin))
|
|
return (EINVAL);
|
|
|
|
/* Toggle the pin */
|
|
BYTGPIO_LOCK(sc);
|
|
reg = BYGPIO_PIN_REGISTER(sc, pin, BYTGPIO_PAD_VAL);
|
|
val = bytgpio_read_4(sc, reg);
|
|
val = val ^ BYTGPIO_PAD_VAL_LEVEL;
|
|
bytgpio_write_4(sc, reg, val);
|
|
BYTGPIO_UNLOCK(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bytgpio_probe(device_t dev)
|
|
{
|
|
static char *gpio_ids[] = { "INT33FC", NULL };
|
|
|
|
if (acpi_disabled("gpio") ||
|
|
ACPI_ID_PROBE(device_get_parent(dev), dev, gpio_ids) == NULL)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "Intel Baytrail GPIO Controller");
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bytgpio_attach(device_t dev)
|
|
{
|
|
struct bytgpio_softc *sc;
|
|
ACPI_STATUS status;
|
|
int uid;
|
|
int pin;
|
|
uint32_t reg, val;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->sc_dev = dev;
|
|
sc->sc_handle = acpi_get_handle(dev);
|
|
status = acpi_GetInteger(sc->sc_handle, "_UID", &uid);
|
|
if (ACPI_FAILURE(status)) {
|
|
device_printf(dev, "failed to read _UID\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
BYTGPIO_LOCK_INIT(sc);
|
|
|
|
switch (uid) {
|
|
case SCORE_UID:
|
|
sc->sc_npins = SCORE_PINS;
|
|
sc->sc_bank_prefix = SCORE_BANK_PREFIX;
|
|
sc->sc_pinpad_map = bytgpio_score_pins;
|
|
break;
|
|
case NCORE_UID:
|
|
sc->sc_npins = NCORE_PINS;
|
|
sc->sc_bank_prefix = NCORE_BANK_PREFIX;
|
|
sc->sc_pinpad_map = bytgpio_ncore_pins;
|
|
break;
|
|
case SUS_UID:
|
|
sc->sc_npins = SUS_PINS;
|
|
sc->sc_bank_prefix = SUS_BANK_PREFIX;
|
|
sc->sc_pinpad_map = bytgpio_sus_pins;
|
|
break;
|
|
default:
|
|
device_printf(dev, "invalid _UID value: %d\n", uid);
|
|
goto error;
|
|
}
|
|
|
|
sc->sc_pad_funcs = malloc(sizeof(int)*sc->sc_npins, M_DEVBUF,
|
|
M_WAITOK | M_ZERO);
|
|
|
|
sc->sc_mem_rid = 0;
|
|
sc->sc_mem_res = bus_alloc_resource_any(sc->sc_dev,
|
|
SYS_RES_MEMORY, &sc->sc_mem_rid, RF_ACTIVE);
|
|
if (sc->sc_mem_res == NULL) {
|
|
device_printf(dev, "can't allocate resource\n");
|
|
goto error;
|
|
}
|
|
|
|
for (pin = 0; pin < sc->sc_npins; pin++) {
|
|
reg = BYGPIO_PIN_REGISTER(sc, pin, BYTGPIO_PCONF0);
|
|
val = bytgpio_read_4(sc, reg);
|
|
sc->sc_pad_funcs[pin] = val & BYTGPIO_PCONF0_FUNC_MASK;
|
|
}
|
|
|
|
sc->sc_busdev = gpiobus_attach_bus(dev);
|
|
if (sc->sc_busdev == NULL) {
|
|
BYTGPIO_LOCK_DESTROY(sc);
|
|
bus_release_resource(dev, SYS_RES_MEMORY,
|
|
sc->sc_mem_rid, sc->sc_mem_res);
|
|
return (ENXIO);
|
|
}
|
|
|
|
return (0);
|
|
|
|
error:
|
|
BYTGPIO_LOCK_DESTROY(sc);
|
|
|
|
return (ENXIO);
|
|
}
|
|
|
|
|
|
static int
|
|
bytgpio_detach(device_t dev)
|
|
{
|
|
struct bytgpio_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
if (sc->sc_busdev)
|
|
gpiobus_detach_bus(dev);
|
|
|
|
BYTGPIO_LOCK_DESTROY(sc);
|
|
|
|
if (sc->sc_pad_funcs)
|
|
free(sc->sc_pad_funcs, M_DEVBUF);
|
|
|
|
if (sc->sc_mem_res != NULL)
|
|
bus_release_resource(dev, SYS_RES_MEMORY,
|
|
sc->sc_mem_rid, sc->sc_mem_res);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t bytgpio_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, bytgpio_probe),
|
|
DEVMETHOD(device_attach, bytgpio_attach),
|
|
DEVMETHOD(device_detach, bytgpio_detach),
|
|
|
|
/* GPIO protocol */
|
|
DEVMETHOD(gpio_get_bus, bytgpio_get_bus),
|
|
DEVMETHOD(gpio_pin_max, bytgpio_pin_max),
|
|
DEVMETHOD(gpio_pin_getname, bytgpio_pin_getname),
|
|
DEVMETHOD(gpio_pin_getflags, bytgpio_pin_getflags),
|
|
DEVMETHOD(gpio_pin_getcaps, bytgpio_pin_getcaps),
|
|
DEVMETHOD(gpio_pin_setflags, bytgpio_pin_setflags),
|
|
DEVMETHOD(gpio_pin_get, bytgpio_pin_get),
|
|
DEVMETHOD(gpio_pin_set, bytgpio_pin_set),
|
|
DEVMETHOD(gpio_pin_toggle, bytgpio_pin_toggle),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t bytgpio_driver = {
|
|
"gpio",
|
|
bytgpio_methods,
|
|
sizeof(struct bytgpio_softc),
|
|
};
|
|
|
|
static devclass_t bytgpio_devclass;
|
|
DRIVER_MODULE(bytgpio, acpi, bytgpio_driver, bytgpio_devclass, 0, 0);
|
|
MODULE_DEPEND(bytgpio, acpi, 1, 1, 1);
|
|
MODULE_DEPEND(bytgpio, gpiobus, 1, 1, 1);
|