Rework the Ti GPIO code to allow for both the OMAP4 and AM335X attachments
to be present. Thsi creates a new per-SoC driver that handles probe and setting/getting the gpio flags. Differential Revision: https://reviews.freebsd.org/D943 Reviewed by: loos, rpaulo MFC after: 1 week
This commit is contained in:
parent
daed8c66c5
commit
b6c7dacfc9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=273262
156
sys/arm/ti/am335x/am335x_gpio.c
Normal file
156
sys/arm/ti/am335x/am335x_gpio.c
Normal file
@ -0,0 +1,156 @@
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/*-
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* Copyright (c) 2012 Damjan Marion <dmarion@FreeBSD.org>
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* Copyright (c) 2014 Andrew Turner <andrew@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
|
||||
* 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)
|
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* 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 <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <sys/gpio.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/ti/ti_cpuid.h>
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#include <arm/ti/ti_gpio.h>
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#include <arm/ti/ti_scm.h>
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#include <arm/ti/am335x/am335x_scm_padconf.h>
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#include "ti_gpio_if.h"
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static struct ofw_compat_data compat_data[] = {
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{"ti,am335x-gpio", 1},
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/* Linux uses ti,omap4-gpio on am335x so we need to support it */
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{"ti,omap4-gpio", 1},
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{"ti,gpio", 1},
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{NULL, 0},
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};
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static int
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am335x_gpio_probe(device_t dev)
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{
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if (ti_chip() != CHIP_AM335X)
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return (ENXIO);
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "Ti AM335x General Purpose I/O (GPIO)");
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return (0);
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}
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static int
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am335x_gpio_set_flags(device_t dev, uint32_t gpio, uint32_t flags)
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{
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unsigned int state = 0;
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if (flags & GPIO_PIN_OUTPUT) {
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if (flags & GPIO_PIN_PULLUP)
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state = PADCONF_OUTPUT_PULLUP;
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else
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state = PADCONF_OUTPUT;
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} else if (flags & GPIO_PIN_INPUT) {
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if (flags & GPIO_PIN_PULLUP)
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state = PADCONF_INPUT_PULLUP;
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else if (flags & GPIO_PIN_PULLDOWN)
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state = PADCONF_INPUT_PULLDOWN;
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else
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state = PADCONF_INPUT;
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}
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return ti_scm_padconf_set_gpiomode(gpio, state);
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}
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static int
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am335x_gpio_get_flags(device_t dev, uint32_t gpio, uint32_t *flags)
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{
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unsigned int state;
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if (ti_scm_padconf_get_gpiomode(gpio, &state) != 0) {
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*flags = 0;
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return (EINVAL);
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} else {
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switch (state) {
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case PADCONF_OUTPUT:
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*flags = GPIO_PIN_OUTPUT;
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break;
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case PADCONF_OUTPUT_PULLUP:
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*flags = GPIO_PIN_OUTPUT | GPIO_PIN_PULLUP;
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break;
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case PADCONF_INPUT:
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*flags = GPIO_PIN_INPUT;
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break;
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case PADCONF_INPUT_PULLUP:
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*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
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break;
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case PADCONF_INPUT_PULLDOWN:
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*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
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break;
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default:
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*flags = 0;
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break;
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}
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}
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return (0);
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}
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static device_method_t am335x_gpio_methods[] = {
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/* bus interface */
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DEVMETHOD(device_probe, am335x_gpio_probe),
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/* ti_gpio interface */
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DEVMETHOD(ti_gpio_set_flags, am335x_gpio_set_flags),
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DEVMETHOD(ti_gpio_get_flags, am335x_gpio_get_flags),
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DEVMETHOD_END
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};
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extern driver_t ti_gpio_driver;
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static devclass_t am335x_gpio_devclass;
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DEFINE_CLASS_1(gpio, am335x_gpio_driver, am335x_gpio_methods,
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sizeof(struct ti_gpio_softc), ti_gpio_driver);
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DRIVER_MODULE(am335x_gpio, simplebus, am335x_gpio_driver, am335x_gpio_devclass,
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0, 0);
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@ -47,6 +47,8 @@ __FBSDID("$FreeBSD$");
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#include <arm/ti/tivar.h>
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#include <arm/ti/ti_scm.h>
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#include <arm/ti/am335x/am335x_scm_padconf.h>
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#define _PIN(r, b, gp, gm, m0, m1, m2, m3, m4, m5, m6, m7) \
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{ .reg_off = r, \
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.gpio_pin = gp, \
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@ -62,18 +64,6 @@ __FBSDID("$FreeBSD$");
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.muxmodes[7] = m7, \
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}
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#define SLEWCTRL (0x01 << 6) /* faster(0) or slower(1) slew rate. */
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#define RXACTIVE (0x01 << 5) /* Input enable value for the Pad */
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#define PULLTYPESEL (0x01 << 4) /* Pad pullup/pulldown type selection */
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#define PULLUDEN (0x01 << 3) /* Pullup/pulldown disabled */
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#define PADCONF_OUTPUT (0)
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#define PADCONF_OUTPUT_PULLUP (PULLTYPESEL)
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#define PADCONF_INPUT (RXACTIVE | PULLUDEN)
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#define PADCONF_INPUT_PULLUP (RXACTIVE | PULLTYPESEL)
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#define PADCONF_INPUT_PULLDOWN (RXACTIVE)
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#define PADCONF_INPUT_PULLUP_SLOW (PADCONF_INPUT_PULLUP | SLEWCTRL)
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const static struct ti_scm_padstate ti_padstate_devmap[] = {
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{"output", PADCONF_OUTPUT },
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{"output_pullup", PADCONF_OUTPUT_PULLUP },
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@ -311,54 +301,3 @@ const struct ti_scm_device ti_scm_dev = {
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.padstate = (struct ti_scm_padstate *) &ti_padstate_devmap,
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.padconf = (struct ti_scm_padconf *) &ti_padconf_devmap,
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};
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int
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ti_scm_padconf_set_gpioflags(uint32_t gpio, uint32_t flags)
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{
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unsigned int state = 0;
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if (flags & GPIO_PIN_OUTPUT) {
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if (flags & GPIO_PIN_PULLUP)
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state = PADCONF_OUTPUT_PULLUP;
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else
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state = PADCONF_OUTPUT;
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} else if (flags & GPIO_PIN_INPUT) {
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if (flags & GPIO_PIN_PULLUP)
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state = PADCONF_INPUT_PULLUP;
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else if (flags & GPIO_PIN_PULLDOWN)
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state = PADCONF_INPUT_PULLDOWN;
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else
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state = PADCONF_INPUT;
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}
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return ti_scm_padconf_set_gpiomode(gpio, state);
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}
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void
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ti_scm_padconf_get_gpioflags(uint32_t gpio, uint32_t *flags)
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{
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unsigned int state;
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if (ti_scm_padconf_get_gpiomode(gpio, &state) != 0)
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*flags = 0;
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else {
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switch (state) {
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case PADCONF_OUTPUT:
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*flags = GPIO_PIN_OUTPUT;
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break;
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case PADCONF_OUTPUT_PULLUP:
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*flags = GPIO_PIN_OUTPUT | GPIO_PIN_PULLUP;
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break;
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case PADCONF_INPUT:
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*flags = GPIO_PIN_INPUT;
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break;
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case PADCONF_INPUT_PULLUP:
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*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
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break;
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case PADCONF_INPUT_PULLDOWN:
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*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
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break;
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default:
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*flags = 0;
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break;
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}
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}
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}
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44
sys/arm/ti/am335x/am335x_scm_padconf.h
Normal file
44
sys/arm/ti/am335x/am335x_scm_padconf.h
Normal file
@ -0,0 +1,44 @@
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/*-
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* Copyright (c) 2012 Damjan Marion <dmarion@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
|
||||
* 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.
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*
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* $FreeBSD$
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*/
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#ifndef AM335X_SCM_PADCONF_H
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#define AM335X_SCM_PADCONF_H
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#define SLEWCTRL (0x01 << 6) /* faster(0) or slower(1) slew rate. */
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#define RXACTIVE (0x01 << 5) /* Input enable value for the Pad */
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#define PULLTYPESEL (0x01 << 4) /* Pad pullup/pulldown type selection */
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#define PULLUDEN (0x01 << 3) /* Pullup/pulldown disabled */
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#define PADCONF_OUTPUT (0)
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#define PADCONF_OUTPUT_PULLUP (PULLTYPESEL)
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#define PADCONF_INPUT (RXACTIVE | PULLUDEN)
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#define PADCONF_INPUT_PULLUP (RXACTIVE | PULLTYPESEL)
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#define PADCONF_INPUT_PULLDOWN (RXACTIVE)
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#define PADCONF_INPUT_PULLUP_SLOW (PADCONF_INPUT_PULLUP | SLEWCTRL)
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#endif /* AM335X_SCM_PADCONF_H */
|
@ -3,6 +3,7 @@
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arm/ti/aintc.c standard
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|
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arm/ti/am335x/am335x_dmtimer.c standard
|
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arm/ti/am335x/am335x_gpio.c optional gpio
|
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arm/ti/am335x/am335x_lcd.c optional sc
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arm/ti/am335x/am335x_lcd_syscons.c optional sc
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arm/ti/am335x/am335x_pmic.c optional am335x_pmic
|
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|
@ -21,6 +21,7 @@ arm/ti/ti_pruss.c optional ti_pruss
|
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arm/ti/ti_wdt.c optional ti_wdt
|
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arm/ti/ti_adc.c optional ti_adc
|
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arm/ti/ti_gpio.c optional gpio
|
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arm/ti/ti_gpio_if.m optional gpio
|
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arm/ti/ti_i2c.c optional ti_i2c
|
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arm/ti/ti_sdhci.c optional sdhci
|
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|
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|
@ -7,6 +7,7 @@ arm/ti/ti_smc.S standard
|
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arm/ti/usb/omap_ehci.c optional usb ehci
|
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arm/ti/ti_sdma.c optional ti_sdma
|
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|
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arm/ti/omap4/omap4_gpio.c optional gpio
|
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arm/ti/omap4/omap4_l2cache.c optional pl310
|
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arm/ti/omap4/omap4_prcm_clks.c standard
|
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arm/ti/omap4/omap4_scm_padconf.c standard
|
||||
|
143
sys/arm/ti/omap4/omap4_gpio.c
Normal file
143
sys/arm/ti/omap4/omap4_gpio.c
Normal file
@ -0,0 +1,143 @@
|
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/*-
|
||||
* Copyright (c) 2011 Ben Gray <ben.r.gray@gmail.com>.
|
||||
* Copyright (c) 2014 Andrew Turner <andrew@FreeBSD.org>
|
||||
* 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.
|
||||
* 3. The name of the company nor the name of the author may be used to
|
||||
* endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY BEN GRAY ``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 BEN GRAY 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/kernel.h>
|
||||
#include <sys/module.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/gpio.h>
|
||||
|
||||
#include <machine/bus.h>
|
||||
|
||||
#include <dev/fdt/fdt_common.h>
|
||||
#include <dev/ofw/ofw_bus.h>
|
||||
#include <dev/ofw/ofw_bus_subr.h>
|
||||
|
||||
#include <arm/ti/ti_cpuid.h>
|
||||
#include <arm/ti/ti_gpio.h>
|
||||
#include <arm/ti/ti_scm.h>
|
||||
|
||||
#include <arm/ti/omap4/omap4_scm_padconf.h>
|
||||
|
||||
#include "ti_gpio_if.h"
|
||||
|
||||
static struct ofw_compat_data compat_data[] = {
|
||||
{"ti,omap4-gpio", 1},
|
||||
{"ti,gpio", 1},
|
||||
{NULL, 0},
|
||||
};
|
||||
|
||||
static int
|
||||
omap4_gpio_probe(device_t dev)
|
||||
{
|
||||
if (ti_chip() != CHIP_OMAP_4)
|
||||
return (ENXIO);
|
||||
|
||||
if (!ofw_bus_status_okay(dev))
|
||||
return (ENXIO);
|
||||
|
||||
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
|
||||
return (ENXIO);
|
||||
|
||||
device_set_desc(dev, "Ti OMAP4 General Purpose I/O (GPIO)");
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
omap4_gpio_set_flags(device_t dev, uint32_t gpio, uint32_t flags)
|
||||
{
|
||||
unsigned int state = 0;
|
||||
/* First the SCM driver needs to be told to put the pad into GPIO mode */
|
||||
if (flags & GPIO_PIN_OUTPUT)
|
||||
state = PADCONF_PIN_OUTPUT;
|
||||
else if (flags & GPIO_PIN_INPUT) {
|
||||
if (flags & GPIO_PIN_PULLUP)
|
||||
state = PADCONF_PIN_INPUT_PULLUP;
|
||||
else if (flags & GPIO_PIN_PULLDOWN)
|
||||
state = PADCONF_PIN_INPUT_PULLDOWN;
|
||||
else
|
||||
state = PADCONF_PIN_INPUT;
|
||||
}
|
||||
return ti_scm_padconf_set_gpiomode(gpio, state);
|
||||
}
|
||||
|
||||
static int
|
||||
omap4_gpio_get_flags(device_t dev, uint32_t gpio, uint32_t *flags)
|
||||
{
|
||||
unsigned int state;
|
||||
|
||||
/* Get the current pin state */
|
||||
if (ti_scm_padconf_get_gpiomode(gpio, &state) != 0) {
|
||||
*flags = 0;
|
||||
return (EINVAL);
|
||||
} else {
|
||||
switch (state) {
|
||||
case PADCONF_PIN_OUTPUT:
|
||||
*flags = GPIO_PIN_OUTPUT;
|
||||
break;
|
||||
case PADCONF_PIN_INPUT:
|
||||
*flags = GPIO_PIN_INPUT;
|
||||
break;
|
||||
case PADCONF_PIN_INPUT_PULLUP:
|
||||
*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
|
||||
break;
|
||||
case PADCONF_PIN_INPUT_PULLDOWN:
|
||||
*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
|
||||
break;
|
||||
default:
|
||||
*flags = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static device_method_t omap4_gpio_methods[] = {
|
||||
/* bus interface */
|
||||
DEVMETHOD(device_probe, omap4_gpio_probe),
|
||||
|
||||
/* ti_gpio interface */
|
||||
DEVMETHOD(ti_gpio_set_flags, omap4_gpio_set_flags),
|
||||
DEVMETHOD(ti_gpio_get_flags, omap4_gpio_get_flags),
|
||||
|
||||
DEVMETHOD_END
|
||||
};
|
||||
|
||||
extern driver_t ti_gpio_driver;
|
||||
static devclass_t omap4_gpio_devclass;
|
||||
|
||||
DEFINE_CLASS_1(gpio, omap4_gpio_driver, omap4_gpio_methods,
|
||||
sizeof(struct ti_gpio_softc), ti_gpio_driver);
|
||||
DRIVER_MODULE(omap4_gpio, simplebus, omap4_gpio_driver, omap4_gpio_devclass,
|
||||
0, 0);
|
@ -40,16 +40,9 @@ __FBSDID("$FreeBSD$");
|
||||
#include <sys/malloc.h>
|
||||
|
||||
#include <machine/bus.h>
|
||||
#include <machine/cpu.h>
|
||||
#include <machine/cpufunc.h>
|
||||
#include <machine/resource.h>
|
||||
#include <machine/intr.h>
|
||||
#include <sys/gpio.h>
|
||||
|
||||
#include <arm/ti/tivar.h>
|
||||
#include <arm/ti/ti_scm.h>
|
||||
#include <arm/ti/omap4/omap4var.h>
|
||||
#include <arm/ti/omap4/omap4_reg.h>
|
||||
#include <arm/ti/omap4/omap4_scm_padconf.h>
|
||||
|
||||
|
||||
/*
|
||||
@ -69,53 +62,6 @@ __FBSDID("$FreeBSD$");
|
||||
*
|
||||
*/
|
||||
|
||||
#define CONTROL_PADCONF_WAKEUP_EVENT (1UL << 15)
|
||||
#define CONTROL_PADCONF_WAKEUP_ENABLE (1UL << 14)
|
||||
#define CONTROL_PADCONF_OFF_PULL_UP (1UL << 13)
|
||||
#define CONTROL_PADCONF_OFF_PULL_ENABLE (1UL << 12)
|
||||
#define CONTROL_PADCONF_OFF_OUT_HIGH (1UL << 11)
|
||||
#define CONTROL_PADCONF_OFF_OUT_ENABLE (1UL << 10)
|
||||
#define CONTROL_PADCONF_OFF_ENABLE (1UL << 9)
|
||||
#define CONTROL_PADCONF_INPUT_ENABLE (1UL << 8)
|
||||
#define CONTROL_PADCONF_PULL_UP (1UL << 4)
|
||||
#define CONTROL_PADCONF_PULL_ENABLE (1UL << 3)
|
||||
#define CONTROL_PADCONF_MUXMODE_MASK (0x7)
|
||||
|
||||
#define CONTROL_PADCONF_SATE_MASK ( CONTROL_PADCONF_WAKEUP_EVENT \
|
||||
| CONTROL_PADCONF_WAKEUP_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_UP \
|
||||
| CONTROL_PADCONF_OFF_PULL_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_HIGH \
|
||||
| CONTROL_PADCONF_OFF_OUT_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_INPUT_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_UP \
|
||||
| CONTROL_PADCONF_PULL_ENABLE )
|
||||
|
||||
/* Active pin states */
|
||||
#define PADCONF_PIN_OUTPUT 0
|
||||
#define PADCONF_PIN_INPUT CONTROL_PADCONF_INPUT_ENABLE
|
||||
#define PADCONF_PIN_INPUT_PULLUP ( CONTROL_PADCONF_INPUT_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_UP)
|
||||
#define PADCONF_PIN_INPUT_PULLDOWN ( CONTROL_PADCONF_INPUT_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_ENABLE )
|
||||
|
||||
/* Off mode states */
|
||||
#define PADCONF_PIN_OFF_NONE 0
|
||||
#define PADCONF_PIN_OFF_OUTPUT_HIGH ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_HIGH)
|
||||
#define PADCONF_PIN_OFF_OUTPUT_LOW ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_ENABLE)
|
||||
#define PADCONF_PIN_OFF_INPUT_PULLUP ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_UP)
|
||||
#define PADCONF_PIN_OFF_INPUT_PULLDOWN ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_ENABLE)
|
||||
#define PADCONF_PIN_OFF_WAKEUPENABLE CONTROL_PADCONF_WAKEUP_ENABLE
|
||||
|
||||
|
||||
#define _PINDEF(r, b, gp, gm, m0, m1, m2, m3, m4, m5, m6, m7) \
|
||||
{ .reg_off = r, \
|
||||
.gpio_pin = gp, \
|
||||
@ -355,50 +301,3 @@ const struct ti_scm_device ti_scm_dev = {
|
||||
.padstate = (struct ti_scm_padstate *) &ti_padstate_devmap,
|
||||
.padconf = (struct ti_scm_padconf *) &ti_padconf_devmap,
|
||||
};
|
||||
|
||||
int
|
||||
ti_scm_padconf_set_gpioflags(uint32_t gpio, uint32_t flags)
|
||||
{
|
||||
unsigned int state = 0;
|
||||
/* First the SCM driver needs to be told to put the pad into GPIO mode */
|
||||
if (flags & GPIO_PIN_OUTPUT)
|
||||
state = PADCONF_PIN_OUTPUT;
|
||||
else if (flags & GPIO_PIN_INPUT) {
|
||||
if (flags & GPIO_PIN_PULLUP)
|
||||
state = PADCONF_PIN_INPUT_PULLUP;
|
||||
else if (flags & GPIO_PIN_PULLDOWN)
|
||||
state = PADCONF_PIN_INPUT_PULLDOWN;
|
||||
else
|
||||
state = PADCONF_PIN_INPUT;
|
||||
}
|
||||
return ti_scm_padconf_set_gpiomode(gpio, state);
|
||||
}
|
||||
|
||||
void
|
||||
ti_scm_padconf_get_gpioflags(uint32_t gpio, uint32_t *flags)
|
||||
{
|
||||
unsigned int state;
|
||||
/* Get the current pin state */
|
||||
if (ti_scm_padconf_get_gpiomode(gpio, &state) != 0)
|
||||
*flags = 0;
|
||||
else {
|
||||
switch (state) {
|
||||
case PADCONF_PIN_OUTPUT:
|
||||
*flags = GPIO_PIN_OUTPUT;
|
||||
break;
|
||||
case PADCONF_PIN_INPUT:
|
||||
*flags = GPIO_PIN_INPUT;
|
||||
break;
|
||||
case PADCONF_PIN_INPUT_PULLUP:
|
||||
*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLUP;
|
||||
break;
|
||||
case PADCONF_PIN_INPUT_PULLDOWN:
|
||||
*flags = GPIO_PIN_INPUT | GPIO_PIN_PULLDOWN;
|
||||
break;
|
||||
default:
|
||||
*flags = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
81
sys/arm/ti/omap4/omap4_scm_padconf.h
Normal file
81
sys/arm/ti/omap4/omap4_scm_padconf.h
Normal file
@ -0,0 +1,81 @@
|
||||
/*-
|
||||
* Copyright (c) 2011
|
||||
* Ben Gray <ben.r.gray@gmail.com>.
|
||||
* 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.
|
||||
* 3. The name of the company nor the name of the author may be used to
|
||||
* endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY BEN GRAY ``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 BEN GRAY 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.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef OMAP4_SCM_PADCONF_H
|
||||
#define OMAP4_SCM_PADCONF_H
|
||||
|
||||
#define CONTROL_PADCONF_WAKEUP_EVENT (1UL << 15)
|
||||
#define CONTROL_PADCONF_WAKEUP_ENABLE (1UL << 14)
|
||||
#define CONTROL_PADCONF_OFF_PULL_UP (1UL << 13)
|
||||
#define CONTROL_PADCONF_OFF_PULL_ENABLE (1UL << 12)
|
||||
#define CONTROL_PADCONF_OFF_OUT_HIGH (1UL << 11)
|
||||
#define CONTROL_PADCONF_OFF_OUT_ENABLE (1UL << 10)
|
||||
#define CONTROL_PADCONF_OFF_ENABLE (1UL << 9)
|
||||
#define CONTROL_PADCONF_INPUT_ENABLE (1UL << 8)
|
||||
#define CONTROL_PADCONF_PULL_UP (1UL << 4)
|
||||
#define CONTROL_PADCONF_PULL_ENABLE (1UL << 3)
|
||||
#define CONTROL_PADCONF_MUXMODE_MASK (0x7)
|
||||
|
||||
#define CONTROL_PADCONF_SATE_MASK ( CONTROL_PADCONF_WAKEUP_EVENT \
|
||||
| CONTROL_PADCONF_WAKEUP_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_UP \
|
||||
| CONTROL_PADCONF_OFF_PULL_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_HIGH \
|
||||
| CONTROL_PADCONF_OFF_OUT_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_INPUT_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_UP \
|
||||
| CONTROL_PADCONF_PULL_ENABLE )
|
||||
|
||||
/* Active pin states */
|
||||
#define PADCONF_PIN_OUTPUT 0
|
||||
#define PADCONF_PIN_INPUT CONTROL_PADCONF_INPUT_ENABLE
|
||||
#define PADCONF_PIN_INPUT_PULLUP ( CONTROL_PADCONF_INPUT_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_UP)
|
||||
#define PADCONF_PIN_INPUT_PULLDOWN ( CONTROL_PADCONF_INPUT_ENABLE \
|
||||
| CONTROL_PADCONF_PULL_ENABLE )
|
||||
|
||||
/* Off mode states */
|
||||
#define PADCONF_PIN_OFF_NONE 0
|
||||
#define PADCONF_PIN_OFF_OUTPUT_HIGH ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_HIGH)
|
||||
#define PADCONF_PIN_OFF_OUTPUT_LOW ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_OUT_ENABLE)
|
||||
#define PADCONF_PIN_OFF_INPUT_PULLUP ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_UP)
|
||||
#define PADCONF_PIN_OFF_INPUT_PULLDOWN ( CONTROL_PADCONF_OFF_ENABLE \
|
||||
| CONTROL_PADCONF_OFF_PULL_ENABLE)
|
||||
#define PADCONF_PIN_OFF_WAKEUPENABLE CONTROL_PADCONF_WAKEUP_ENABLE
|
||||
|
||||
#endif /* OMAP4_SCM_PADCONF_H */
|
@ -57,6 +57,7 @@ __FBSDID("$FreeBSD$");
|
||||
#include <machine/resource.h>
|
||||
|
||||
#include <arm/ti/ti_cpuid.h>
|
||||
#include <arm/ti/ti_gpio.h>
|
||||
#include <arm/ti/ti_scm.h>
|
||||
#include <arm/ti/ti_prcm.h>
|
||||
|
||||
@ -66,6 +67,7 @@ __FBSDID("$FreeBSD$");
|
||||
#include <dev/ofw/ofw_bus_subr.h>
|
||||
|
||||
#include "gpio_if.h"
|
||||
#include "ti_gpio_if.h"
|
||||
|
||||
/* Register definitions */
|
||||
#define TI_GPIO_REVISION 0x0000
|
||||
@ -115,9 +117,6 @@ __FBSDID("$FreeBSD$");
|
||||
#define AM335X_INTR_PER_BANK 2
|
||||
#define AM335X_GPIO_REV 0x50600801
|
||||
#define PINS_PER_BANK 32
|
||||
#define MAX_GPIO_BANKS 6
|
||||
/* Maximum GPIOS possible, max of *_MAX_GPIO_BANKS * *_INTR_PER_BANK */
|
||||
#define MAX_GPIO_INTRS 8
|
||||
|
||||
static u_int
|
||||
ti_max_gpio_banks(void)
|
||||
@ -224,33 +223,6 @@ static struct resource_spec ti_gpio_irq_spec[] = {
|
||||
{ -1, 0, 0 }
|
||||
};
|
||||
|
||||
/**
|
||||
* Structure that stores the driver context.
|
||||
*
|
||||
* This structure is allocated during driver attach.
|
||||
*/
|
||||
struct ti_gpio_softc {
|
||||
device_t sc_dev;
|
||||
|
||||
/*
|
||||
* The memory resource(s) for the PRCM register set, when the device is
|
||||
* created the caller can assign up to 6 memory regions depending on
|
||||
* the SoC type.
|
||||
*/
|
||||
struct resource *sc_mem_res[MAX_GPIO_BANKS];
|
||||
struct resource *sc_irq_res[MAX_GPIO_INTRS];
|
||||
|
||||
/* The handle for the register IRQ handlers. */
|
||||
void *sc_irq_hdl[MAX_GPIO_INTRS];
|
||||
|
||||
/*
|
||||
* The following describes the H/W revision of each of the GPIO banks.
|
||||
*/
|
||||
uint32_t sc_revision[MAX_GPIO_BANKS];
|
||||
|
||||
struct mtx sc_mtx;
|
||||
};
|
||||
|
||||
/**
|
||||
* Macros for driver mutex locking
|
||||
*/
|
||||
@ -418,7 +390,7 @@ ti_gpio_pin_getflags(device_t dev, uint32_t pin, uint32_t *flags)
|
||||
}
|
||||
|
||||
/* Get the current pin state */
|
||||
ti_scm_padconf_get_gpioflags(pin, flags);
|
||||
TI_GPIO_GET_FLAGS(dev, pin, flags);
|
||||
|
||||
TI_GPIO_UNLOCK(sc);
|
||||
|
||||
@ -509,7 +481,7 @@ ti_gpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags)
|
||||
}
|
||||
|
||||
/* Set the GPIO mode and state */
|
||||
if (ti_scm_padconf_set_gpioflags(pin, flags) != 0) {
|
||||
if (TI_GPIO_SET_FLAGS(dev, pin, flags) != 0) {
|
||||
TI_GPIO_UNLOCK(sc);
|
||||
return (EINVAL);
|
||||
}
|
||||
@ -669,33 +641,6 @@ ti_gpio_intr(void *arg)
|
||||
TI_GPIO_UNLOCK(sc);
|
||||
}
|
||||
|
||||
/**
|
||||
* ti_gpio_probe - probe function for the driver
|
||||
* @dev: gpio device handle
|
||||
*
|
||||
* Simply sets the name of the driver
|
||||
*
|
||||
* LOCKING:
|
||||
* None
|
||||
*
|
||||
* RETURNS:
|
||||
* Always returns 0
|
||||
*/
|
||||
static int
|
||||
ti_gpio_probe(device_t dev)
|
||||
{
|
||||
|
||||
if (!ofw_bus_status_okay(dev))
|
||||
return (ENXIO);
|
||||
|
||||
if (!ofw_bus_is_compatible(dev, "ti,gpio"))
|
||||
return (ENXIO);
|
||||
|
||||
device_set_desc(dev, "TI General Purpose I/O (GPIO)");
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
ti_gpio_attach_intr(device_t dev)
|
||||
{
|
||||
@ -776,8 +721,7 @@ ti_gpio_bank_init(device_t dev, int bank)
|
||||
/* Init OE register based on pads configuration. */
|
||||
reg_oe = 0xffffffff;
|
||||
for (pin = 0; pin < PINS_PER_BANK; pin++) {
|
||||
ti_scm_padconf_get_gpioflags(PINS_PER_BANK * bank + pin,
|
||||
&flags);
|
||||
TI_GPIO_GET_FLAGS(dev, PINS_PER_BANK * bank + pin, &flags);
|
||||
if (flags & GPIO_PIN_OUTPUT)
|
||||
reg_oe &= ~(1UL << pin);
|
||||
}
|
||||
@ -910,7 +854,6 @@ ti_gpio_get_node(device_t bus, device_t dev)
|
||||
}
|
||||
|
||||
static device_method_t ti_gpio_methods[] = {
|
||||
DEVMETHOD(device_probe, ti_gpio_probe),
|
||||
DEVMETHOD(device_attach, ti_gpio_attach),
|
||||
DEVMETHOD(device_detach, ti_gpio_detach),
|
||||
|
||||
@ -930,11 +873,8 @@ static device_method_t ti_gpio_methods[] = {
|
||||
{0, 0},
|
||||
};
|
||||
|
||||
static driver_t ti_gpio_driver = {
|
||||
driver_t ti_gpio_driver = {
|
||||
"gpio",
|
||||
ti_gpio_methods,
|
||||
sizeof(struct ti_gpio_softc),
|
||||
};
|
||||
static devclass_t ti_gpio_devclass;
|
||||
|
||||
DRIVER_MODULE(ti_gpio, simplebus, ti_gpio_driver, ti_gpio_devclass, 0, 0);
|
||||
|
69
sys/arm/ti/ti_gpio.h
Normal file
69
sys/arm/ti/ti_gpio.h
Normal file
@ -0,0 +1,69 @@
|
||||
/*-
|
||||
* Copyright (c) 2011
|
||||
* Ben Gray <ben.r.gray@gmail.com>.
|
||||
* 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 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 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.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef TI_GPIO_H
|
||||
#define TI_GPIO_H
|
||||
|
||||
/* The maximum number of banks for any SoC */
|
||||
#define MAX_GPIO_BANKS 6
|
||||
|
||||
/*
|
||||
* Maximum GPIOS possible, max of *_MAX_GPIO_BANKS * *_INTR_PER_BANK.
|
||||
* These are defined in ti_gpio.c
|
||||
*/
|
||||
#define MAX_GPIO_INTRS 8
|
||||
|
||||
/**
|
||||
* Structure that stores the driver context.
|
||||
*
|
||||
* This structure is allocated during driver attach.
|
||||
*/
|
||||
struct ti_gpio_softc {
|
||||
device_t sc_dev;
|
||||
|
||||
/*
|
||||
* The memory resource(s) for the PRCM register set, when the device is
|
||||
* created the caller can assign up to 6 memory regions depending on
|
||||
* the SoC type.
|
||||
*/
|
||||
struct resource *sc_mem_res[MAX_GPIO_BANKS];
|
||||
struct resource *sc_irq_res[MAX_GPIO_INTRS];
|
||||
|
||||
/* The handle for the register IRQ handlers. */
|
||||
void *sc_irq_hdl[MAX_GPIO_INTRS];
|
||||
|
||||
/*
|
||||
* The following describes the H/W revision of each of the GPIO banks.
|
||||
*/
|
||||
uint32_t sc_revision[MAX_GPIO_BANKS];
|
||||
|
||||
struct mtx sc_mtx;
|
||||
};
|
||||
|
||||
#endif /* TI_GPIO_H */
|
49
sys/arm/ti/ti_gpio_if.m
Normal file
49
sys/arm/ti/ti_gpio_if.m
Normal file
@ -0,0 +1,49 @@
|
||||
#-
|
||||
# Copyright (c) 2014 Andrew Turner <andrew@FreeBSD.org>
|
||||
# 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.
|
||||
#
|
||||
# $FreeBSD$
|
||||
#
|
||||
|
||||
#include <sys/bus.h>
|
||||
|
||||
INTERFACE ti_gpio;
|
||||
|
||||
/**
|
||||
* Sets the Ti SoCs gpio flags
|
||||
*/
|
||||
METHOD int set_flags {
|
||||
device_t dev;
|
||||
uint32_t gpio;
|
||||
uint32_t flags;
|
||||
};
|
||||
|
||||
/**
|
||||
* Gets the Ti SoCs gpio flags
|
||||
*/
|
||||
METHOD int get_flags {
|
||||
device_t dev;
|
||||
uint32_t gpio;
|
||||
uint32_t *flags;
|
||||
};
|
@ -76,8 +76,6 @@ int ti_scm_padconf_get(const char *padname, const char **muxmode,
|
||||
unsigned int *state);
|
||||
int ti_scm_padconf_set_gpiomode(uint32_t gpio, unsigned int state);
|
||||
int ti_scm_padconf_get_gpiomode(uint32_t gpio, unsigned int *state);
|
||||
int ti_scm_padconf_set_gpioflags(uint32_t gpio, uint32_t flags);
|
||||
void ti_scm_padconf_get_gpioflags(uint32_t gpio, uint32_t *flags);
|
||||
int ti_scm_reg_read_4(uint32_t reg, uint32_t *val);
|
||||
int ti_scm_reg_write_4(uint32_t reg, uint32_t val);
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user