mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
e160f7d430
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
168 lines
3.7 KiB
C
168 lines
3.7 KiB
C
/*
|
|
* (C) Copyright 2015 Marek Vasut <marex@denx.de>
|
|
*
|
|
* DesignWare APB GPIO driver
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
#include <asm/arch/gpio.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/io.h>
|
|
#include <dm.h>
|
|
#include <dm/device-internal.h>
|
|
#include <dm/lists.h>
|
|
#include <dm/root.h>
|
|
#include <errno.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define GPIO_SWPORT_DR(p) (0x00 + (p) * 0xc)
|
|
#define GPIO_SWPORT_DDR(p) (0x04 + (p) * 0xc)
|
|
#define GPIO_INTEN 0x30
|
|
#define GPIO_INTMASK 0x34
|
|
#define GPIO_INTTYPE_LEVEL 0x38
|
|
#define GPIO_INT_POLARITY 0x3c
|
|
#define GPIO_INTSTATUS 0x40
|
|
#define GPIO_PORTA_DEBOUNCE 0x48
|
|
#define GPIO_PORTA_EOI 0x4c
|
|
#define GPIO_EXT_PORT(p) (0x50 + (p) * 4)
|
|
|
|
struct gpio_dwapb_platdata {
|
|
const char *name;
|
|
int bank;
|
|
int pins;
|
|
fdt_addr_t base;
|
|
};
|
|
|
|
static int dwapb_gpio_direction_input(struct udevice *dev, unsigned pin)
|
|
{
|
|
struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
|
|
|
|
clrbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin);
|
|
return 0;
|
|
}
|
|
|
|
static int dwapb_gpio_direction_output(struct udevice *dev, unsigned pin,
|
|
int val)
|
|
{
|
|
struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
|
|
|
|
setbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin);
|
|
|
|
if (val)
|
|
setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
|
|
else
|
|
clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dwapb_gpio_get_value(struct udevice *dev, unsigned pin)
|
|
{
|
|
struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
|
|
return !!(readl(plat->base + GPIO_EXT_PORT(plat->bank)) & (1 << pin));
|
|
}
|
|
|
|
|
|
static int dwapb_gpio_set_value(struct udevice *dev, unsigned pin, int val)
|
|
{
|
|
struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
|
|
|
|
if (val)
|
|
setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
|
|
else
|
|
clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_gpio_ops gpio_dwapb_ops = {
|
|
.direction_input = dwapb_gpio_direction_input,
|
|
.direction_output = dwapb_gpio_direction_output,
|
|
.get_value = dwapb_gpio_get_value,
|
|
.set_value = dwapb_gpio_set_value,
|
|
};
|
|
|
|
static int gpio_dwapb_probe(struct udevice *dev)
|
|
{
|
|
struct gpio_dev_priv *priv = dev_get_uclass_priv(dev);
|
|
struct gpio_dwapb_platdata *plat = dev->platdata;
|
|
|
|
if (!plat)
|
|
return 0;
|
|
|
|
priv->gpio_count = plat->pins;
|
|
priv->bank_name = plat->name;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpio_dwapb_bind(struct udevice *dev)
|
|
{
|
|
struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
|
|
const void *blob = gd->fdt_blob;
|
|
struct udevice *subdev;
|
|
fdt_addr_t base;
|
|
int ret, node, bank = 0;
|
|
|
|
/* If this is a child device, there is nothing to do here */
|
|
if (plat)
|
|
return 0;
|
|
|
|
base = fdtdec_get_addr(blob, dev_of_offset(dev), "reg");
|
|
if (base == FDT_ADDR_T_NONE) {
|
|
debug("Can't get the GPIO register base address\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
for (node = fdt_first_subnode(blob, dev_of_offset(dev));
|
|
node > 0;
|
|
node = fdt_next_subnode(blob, node)) {
|
|
if (!fdtdec_get_bool(blob, node, "gpio-controller"))
|
|
continue;
|
|
|
|
plat = NULL;
|
|
plat = calloc(1, sizeof(*plat));
|
|
if (!plat)
|
|
return -ENOMEM;
|
|
|
|
plat->base = base;
|
|
plat->bank = bank;
|
|
plat->pins = fdtdec_get_int(blob, node, "snps,nr-gpios", 0);
|
|
plat->name = fdt_stringlist_get(blob, node, "bank-name", 0,
|
|
NULL);
|
|
if (ret)
|
|
goto err;
|
|
|
|
ret = device_bind(dev, dev->driver, plat->name,
|
|
plat, -1, &subdev);
|
|
if (ret)
|
|
goto err;
|
|
|
|
dev_set_of_offset(subdev, node);
|
|
bank++;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
free(plat);
|
|
return ret;
|
|
}
|
|
|
|
static const struct udevice_id gpio_dwapb_ids[] = {
|
|
{ .compatible = "snps,dw-apb-gpio" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(gpio_dwapb) = {
|
|
.name = "gpio-dwapb",
|
|
.id = UCLASS_GPIO,
|
|
.of_match = gpio_dwapb_ids,
|
|
.ops = &gpio_dwapb_ops,
|
|
.bind = gpio_dwapb_bind,
|
|
.probe = gpio_dwapb_probe,
|
|
};
|