diff options
author | ganbold <ganbold@FreeBSD.org> | 2013-02-05 02:25:13 +0000 |
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committer | ganbold <ganbold@FreeBSD.org> | 2013-02-05 02:25:13 +0000 |
commit | 5e7c84227ace667264813a5d2055b26b85057778 (patch) | |
tree | 44d8b4e73dd0c08045c4a6829bb6f3dfd7b3a792 /sys/arm | |
parent | 4bfa972e11dfe356bbcfbfc980440a356bdb39a9 (diff) | |
download | FreeBSD-src-5e7c84227ace667264813a5d2055b26b85057778.zip FreeBSD-src-5e7c84227ace667264813a5d2055b26b85057778.tar.gz |
Add gpio driver and update dts and kernel config accordingly.
Approved by: gonzo@
Diffstat (limited to 'sys/arm')
-rw-r--r-- | sys/arm/allwinner/a10_gpio.c | 521 | ||||
-rw-r--r-- | sys/arm/allwinner/files.a10 | 1 | ||||
-rw-r--r-- | sys/arm/conf/CUBIEBOARD | 2 |
3 files changed, 523 insertions, 1 deletions
diff --git a/sys/arm/allwinner/a10_gpio.c b/sys/arm/allwinner/a10_gpio.c new file mode 100644 index 0000000..b70d036 --- /dev/null +++ b/sys/arm/allwinner/a10_gpio.c @@ -0,0 +1,521 @@ +/*- + * Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@gmail.com> + * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> + * Copyright (c) 2012 Luiz Otavio O Souza. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> + +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/rman.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/gpio.h> + +#include <machine/bus.h> +#include <machine/cpu.h> +#include <machine/cpufunc.h> +#include <machine/resource.h> +#include <machine/fdt.h> +#include <machine/frame.h> +#include <machine/intr.h> + +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include "gpio_if.h" + +/* + * A10 have 9 banks of gpio. + * 32 pins per bank: + * PA0 - PA17 | PB0 - PB23 | PC0 - PC24 + * PD0 - PD27 | PE0 - PE31 | PF0 - PF5 + * PG0 - PG9 | PH0 - PH27 | PI0 - PI12 + */ + +#define A10_GPIO_PINS 288 +#define A10_GPIO_DEFAULT_CAPS (GPIO_PIN_INPUT | GPIO_PIN_OUTPUT | \ + GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN) + +struct a10_gpio_softc { + device_t sc_dev; + struct mtx sc_mtx; + struct resource * sc_mem_res; + struct resource * sc_irq_res; + bus_space_tag_t sc_bst; + bus_space_handle_t sc_bsh; + void * sc_intrhand; + int sc_gpio_npins; + struct gpio_pin sc_gpio_pins[A10_GPIO_PINS]; +}; + +enum a10_gpio_fsel { + A10_GPIO_INPUT, + A10_GPIO_OUTPUT, +}; + +enum a10_gpio_pud { + A10_GPIO_NONE, + A10_GPIO_PULLDOWN, + A10_GPIO_PULLUP, +}; + +#define A10_GPIO_LOCK(_sc) mtx_lock(&_sc->sc_mtx) +#define A10_GPIO_UNLOCK(_sc) mtx_unlock(&_sc->sc_mtx) +#define A10_GPIO_LOCK_ASSERT(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED) + +#define A10_GPIO_GP_CFG(_bank, _pin) 0x00 + ((_bank) * 0x24) + ((_pin)<<2) +#define A10_GPIO_GP_DAT(_bank) 0x10 + ((_bank) * 0x24) +#define A10_GPIO_GP_DRV(_bank, _pin) 0x14 + ((_bank) * 0x24) + ((_pin)<<2) +#define A10_GPIO_GP_PUL(_bank, _pin) 0x1c + ((_bank) * 0x24) + ((_pin)<<2) + +#define A10_GPIO_GP_INT_CFG0 0x200 +#define A10_GPIO_GP_INT_CFG1 0x204 +#define A10_GPIO_GP_INT_CFG2 0x208 +#define A10_GPIO_GP_INT_CFG3 0x20c + +#define A10_GPIO_GP_INT_CTL 0x210 +#define A10_GPIO_GP_INT_STA 0x214 +#define A10_GPIO_GP_INT_DEB 0x218 + +#define A10_GPIO_WRITE(_sc, _off, _val) \ + bus_space_write_4(_sc->sc_bst, _sc->sc_bsh, _off, _val) +#define A10_GPIO_READ(_sc, _off) \ + bus_space_read_4(_sc->sc_bst, _sc->sc_bsh, _off) + +static uint32_t +a10_gpio_get_function(struct a10_gpio_softc *sc, uint32_t pin) +{ + uint32_t bank, func, offset; + + bank = pin / 32; + pin = pin - 32 * bank; + func = pin >> 3; + offset = ((pin & 0x07) << 2); + + A10_GPIO_LOCK(sc); + func = (A10_GPIO_READ(sc, A10_GPIO_GP_CFG(bank, func)) >> offset) & 7; + A10_GPIO_UNLOCK(sc); + + return (func); +} + +static uint32_t +a10_gpio_func_flag(uint32_t nfunc) +{ + + switch (nfunc) { + case A10_GPIO_INPUT: + return (GPIO_PIN_INPUT); + case A10_GPIO_OUTPUT: + return (GPIO_PIN_OUTPUT); + } + return (0); +} + +static void +a10_gpio_set_function(struct a10_gpio_softc *sc, uint32_t pin, uint32_t f) +{ + uint32_t bank, func, data, offset; + + /* Must be called with lock held. */ + A10_GPIO_LOCK_ASSERT(sc); + + bank = pin / 32; + pin = pin - 32 * bank; + func = pin >> 3; + offset = ((pin & 0x07) << 2); + + data = A10_GPIO_READ(sc, A10_GPIO_GP_CFG(bank, func)); + data &= ~(7 << offset); + data |= (f << offset); + A10_GPIO_WRITE(sc, A10_GPIO_GP_CFG(bank, func), data); +} + +static void +a10_gpio_set_pud(struct a10_gpio_softc *sc, uint32_t pin, uint32_t state) +{ + uint32_t bank, offset, pull, val; + + /* Must be called with lock held. */ + A10_GPIO_LOCK_ASSERT(sc); + + bank = pin / 32; + pin = pin - 32 * bank; + pull = pin >> 4; + offset = ((pin & 0x0f) << 1); + + val = A10_GPIO_READ(sc, A10_GPIO_GP_PUL(bank, pull)); + val &= ~(0x03 << offset); + val |= (state << offset); + A10_GPIO_WRITE(sc, A10_GPIO_GP_PUL(bank, pull), val); +} + +static void +a10_gpio_pin_configure(struct a10_gpio_softc *sc, struct gpio_pin *pin, + unsigned int flags) +{ + + A10_GPIO_LOCK(sc); + + /* + * Manage input/output. + */ + if (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) { + pin->gp_flags &= ~(GPIO_PIN_INPUT|GPIO_PIN_OUTPUT); + if (flags & GPIO_PIN_OUTPUT) { + pin->gp_flags |= GPIO_PIN_OUTPUT; + a10_gpio_set_function(sc, pin->gp_pin, + A10_GPIO_OUTPUT); + } else { + pin->gp_flags |= GPIO_PIN_INPUT; + a10_gpio_set_function(sc, pin->gp_pin, + A10_GPIO_INPUT); + } + } + + /* Manage Pull-up/pull-down. */ + pin->gp_flags &= ~(GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN); + if (flags & (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) { + if (flags & GPIO_PIN_PULLUP) { + pin->gp_flags |= GPIO_PIN_PULLUP; + a10_gpio_set_pud(sc, pin->gp_pin, A10_GPIO_PULLUP); + } else { + pin->gp_flags |= GPIO_PIN_PULLDOWN; + a10_gpio_set_pud(sc, pin->gp_pin, A10_GPIO_PULLDOWN); + } + } else + a10_gpio_set_pud(sc, pin->gp_pin, A10_GPIO_NONE); + + A10_GPIO_UNLOCK(sc); +} + +static int +a10_gpio_pin_max(device_t dev, int *maxpin) +{ + + *maxpin = A10_GPIO_PINS - 1; + return (0); +} + +static int +a10_gpio_pin_getcaps(device_t dev, uint32_t pin, uint32_t *caps) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + int i; + + for (i = 0; i < sc->sc_gpio_npins; i++) { + if (sc->sc_gpio_pins[i].gp_pin == pin) + break; + } + + if (i >= sc->sc_gpio_npins) + return (EINVAL); + + A10_GPIO_LOCK(sc); + *caps = sc->sc_gpio_pins[i].gp_caps; + A10_GPIO_UNLOCK(sc); + + return (0); +} + +static int +a10_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + int i; + + for (i = 0; i < sc->sc_gpio_npins; i++) { + if (sc->sc_gpio_pins[i].gp_pin == pin) + break; + } + + if (i >= sc->sc_gpio_npins) + return (EINVAL); + + A10_GPIO_LOCK(sc); + *flags = sc->sc_gpio_pins[i].gp_flags; + A10_GPIO_UNLOCK(sc); + + return (0); +} + +static int +a10_gpio_pin_getname(device_t dev, uint32_t pin, char *name) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + int i; + + for (i = 0; i < sc->sc_gpio_npins; i++) { + if (sc->sc_gpio_pins[i].gp_pin == pin) + break; + } + + if (i >= sc->sc_gpio_npins) + return (EINVAL); + + A10_GPIO_LOCK(sc); + memcpy(name, sc->sc_gpio_pins[i].gp_name, GPIOMAXNAME); + A10_GPIO_UNLOCK(sc); + + return (0); +} + +static int +a10_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + int i; + + for (i = 0; i < sc->sc_gpio_npins; i++) { + if (sc->sc_gpio_pins[i].gp_pin == pin) + break; + } + + if (i >= sc->sc_gpio_npins) + return (EINVAL); + + /* Filter out unwanted flags. */ + if ((flags &= sc->sc_gpio_pins[i].gp_caps) != flags) + return (EINVAL); + + /* Can't mix input/output together. */ + if ((flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) == + (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) + return (EINVAL); + + /* Can't mix pull-up/pull-down together. */ + if ((flags & (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) == + (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) + return (EINVAL); + + a10_gpio_pin_configure(sc, &sc->sc_gpio_pins[i], flags); + + return (0); +} + +static int +a10_gpio_pin_set(device_t dev, uint32_t pin, unsigned int value) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + uint32_t bank, offset, data; + int i; + + for (i = 0; i < sc->sc_gpio_npins; i++) { + if (sc->sc_gpio_pins[i].gp_pin == pin) + break; + } + + if (i >= sc->sc_gpio_npins) + return (EINVAL); + + bank = pin / 32; + pin = pin - 32 * bank; + offset = pin & 0x1f; + + A10_GPIO_LOCK(sc); + data = A10_GPIO_READ(sc, A10_GPIO_GP_DAT(bank)); + if (value) + data |= (1 << offset); + else + data &= ~(1 << offset); + A10_GPIO_WRITE(sc, A10_GPIO_GP_DAT(bank), data); + A10_GPIO_UNLOCK(sc); + + return (0); +} + +static int +a10_gpio_pin_get(device_t dev, uint32_t pin, unsigned int *val) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + uint32_t bank, offset, reg_data; + int i; + + for (i = 0; i < sc->sc_gpio_npins; i++) { + if (sc->sc_gpio_pins[i].gp_pin == pin) + break; + } + + if (i >= sc->sc_gpio_npins) + return (EINVAL); + + bank = pin / 32; + pin = pin - 32 * bank; + offset = pin & 0x1f; + + A10_GPIO_LOCK(sc); + reg_data = A10_GPIO_READ(sc, A10_GPIO_GP_DAT(bank)); + A10_GPIO_UNLOCK(sc); + *val = (reg_data & (1 << offset)) ? 1 : 0; + + return (0); +} + +static int +a10_gpio_pin_toggle(device_t dev, uint32_t pin) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + uint32_t bank, data, offset; + int i; + + for (i = 0; i < sc->sc_gpio_npins; i++) { + if (sc->sc_gpio_pins[i].gp_pin == pin) + break; + } + + if (i >= sc->sc_gpio_npins) + return (EINVAL); + + bank = pin / 32; + pin = pin - 32 * bank; + offset = pin & 0x1f; + + A10_GPIO_LOCK(sc); + data = A10_GPIO_READ(sc, A10_GPIO_GP_DAT(bank)); + if (data & (1 << offset)) + data &= ~(1 << offset); + else + data |= (1 << offset); + A10_GPIO_WRITE(sc, A10_GPIO_GP_DAT(bank), data); + A10_GPIO_UNLOCK(sc); + + return (0); +} + +static int +a10_gpio_probe(device_t dev) +{ + if (!ofw_bus_is_compatible(dev, "allwinner,sun4i-gpio")) + return (ENXIO); + + device_set_desc(dev, "Allwinner GPIO controller"); + return (BUS_PROBE_DEFAULT); +} + +static int +a10_gpio_attach(device_t dev) +{ + struct a10_gpio_softc *sc = device_get_softc(dev); + uint32_t func; + int i, rid; + phandle_t gpio; + + sc->sc_dev = dev; + + mtx_init(&sc->sc_mtx, "a10 gpio", "gpio", MTX_DEF); + + rid = 0; + sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE); + if (!sc->sc_mem_res) { + device_printf(dev, "cannot allocate memory window\n"); + return (ENXIO); + } + + sc->sc_bst = rman_get_bustag(sc->sc_mem_res); + sc->sc_bsh = rman_get_bushandle(sc->sc_mem_res); + + rid = 0; + sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, + RF_ACTIVE); + if (!sc->sc_irq_res) { + bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); + device_printf(dev, "cannot allocate interrupt\n"); + return (ENXIO); + } + + /* Find our node. */ + gpio = ofw_bus_get_node(sc->sc_dev); + + if (!OF_hasprop(gpio, "gpio-controller")) + /* Node is not a GPIO controller. */ + goto fail; + + /* Initialize the software controlled pins. */ + for (i = 0; i < A10_GPIO_PINS; i++) { + snprintf(sc->sc_gpio_pins[i].gp_name, GPIOMAXNAME, + "pin %d", i); + func = a10_gpio_get_function(sc, i); + sc->sc_gpio_pins[i].gp_pin = i; + sc->sc_gpio_pins[i].gp_caps = A10_GPIO_DEFAULT_CAPS; + sc->sc_gpio_pins[i].gp_flags = a10_gpio_func_flag(func); + } + sc->sc_gpio_npins = i; + + device_add_child(dev, "gpioc", device_get_unit(dev)); + device_add_child(dev, "gpiobus", device_get_unit(dev)); + return (bus_generic_attach(dev)); + +fail: + if (sc->sc_irq_res) + bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res); + if (sc->sc_mem_res) + bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); + return (ENXIO); +} + +static int +a10_gpio_detach(device_t dev) +{ + + return (EBUSY); +} + +static device_method_t a10_gpio_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, a10_gpio_probe), + DEVMETHOD(device_attach, a10_gpio_attach), + DEVMETHOD(device_detach, a10_gpio_detach), + + /* GPIO protocol */ + DEVMETHOD(gpio_pin_max, a10_gpio_pin_max), + DEVMETHOD(gpio_pin_getname, a10_gpio_pin_getname), + DEVMETHOD(gpio_pin_getflags, a10_gpio_pin_getflags), + DEVMETHOD(gpio_pin_getcaps, a10_gpio_pin_getcaps), + DEVMETHOD(gpio_pin_setflags, a10_gpio_pin_setflags), + DEVMETHOD(gpio_pin_get, a10_gpio_pin_get), + DEVMETHOD(gpio_pin_set, a10_gpio_pin_set), + DEVMETHOD(gpio_pin_toggle, a10_gpio_pin_toggle), + + DEVMETHOD_END +}; + +static devclass_t a10_gpio_devclass; + +static driver_t a10_gpio_driver = { + "gpio", + a10_gpio_methods, + sizeof(struct a10_gpio_softc), +}; + +DRIVER_MODULE(a10_gpio, simplebus, a10_gpio_driver, a10_gpio_devclass, 0, 0); diff --git a/sys/arm/allwinner/files.a10 b/sys/arm/allwinner/files.a10 index 9d056fc..5cf2023 100644 --- a/sys/arm/allwinner/files.a10 +++ b/sys/arm/allwinner/files.a10 @@ -10,6 +10,7 @@ arm/arm/cpufunc_asm_armv7.S standard arm/arm/irq_dispatch.S standard arm/allwinner/a10_clk.c standard +arm/allwinner/a10_gpio.c optional gpio arm/allwinner/a10_ehci.c optional ehci arm/allwinner/timer.c standard arm/allwinner/aintc.c standard diff --git a/sys/arm/conf/CUBIEBOARD b/sys/arm/conf/CUBIEBOARD index 82f484b..fa5bfc8 100644 --- a/sys/arm/conf/CUBIEBOARD +++ b/sys/arm/conf/CUBIEBOARD @@ -99,7 +99,7 @@ device random # Entropy device #device iic # GPIO -#device gpio +device gpio device scbus # SCSI bus (required for SCSI) device da # Direct Access (disks) |