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u-boot/drivers/gpio/mxs_gpio.c
Simon Glass 414cc15144 treewide: Simply conditions with the new OF_REAL 
Use this new Kconfig to simplify the compilation conditions where
appropriate.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-25 09:46:15 -06:00

312 lines
7.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
/*
* Freescale i.MX28 GPIO control code
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
*/
#include <common.h>
#include <log.h>
#include <malloc.h>
#include <asm/global_data.h>
#include <linux/bitops.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <asm/arch/iomux.h>
#include <asm/arch/imx-regs.h>
#if defined(CONFIG_MX23)
#define PINCTRL_BANKS 3
#define PINCTRL_DOUT(n) (0x0500 + ((n) * 0x10))
#define PINCTRL_DIN(n) (0x0600 + ((n) * 0x10))
#define PINCTRL_DOE(n) (0x0700 + ((n) * 0x10))
#define PINCTRL_PIN2IRQ(n) (0x0800 + ((n) * 0x10))
#define PINCTRL_IRQEN(n) (0x0900 + ((n) * 0x10))
#define PINCTRL_IRQSTAT(n) (0x0c00 + ((n) * 0x10))
#elif defined(CONFIG_MX28)
#define PINCTRL_BANKS 5
#define PINCTRL_DOUT(n) (0x0700 + ((n) * 0x10))
#define PINCTRL_DIN(n) (0x0900 + ((n) * 0x10))
#define PINCTRL_DOE(n) (0x0b00 + ((n) * 0x10))
#define PINCTRL_PIN2IRQ(n) (0x1000 + ((n) * 0x10))
#define PINCTRL_IRQEN(n) (0x1100 + ((n) * 0x10))
#define PINCTRL_IRQSTAT(n) (0x1400 + ((n) * 0x10))
#else
#error "Please select CONFIG_MX23 or CONFIG_MX28"
#endif
#define GPIO_INT_FALL_EDGE 0x0
#define GPIO_INT_LOW_LEV 0x1
#define GPIO_INT_RISE_EDGE 0x2
#define GPIO_INT_HIGH_LEV 0x3
#define GPIO_INT_LEV_MASK (1 << 0)
#define GPIO_INT_POL_MASK (1 << 1)
void mxs_gpio_init(void)
{
int i;
for (i = 0; i < PINCTRL_BANKS; i++) {
writel(0, MXS_PINCTRL_BASE + PINCTRL_PIN2IRQ(i));
writel(0, MXS_PINCTRL_BASE + PINCTRL_IRQEN(i));
/* Use SCT address here to clear the IRQSTAT bits */
writel(0xffffffff, MXS_PINCTRL_BASE + PINCTRL_IRQSTAT(i) + 8);
}
}
#if !CONFIG_IS_ENABLED(DM_GPIO)
int gpio_get_value(unsigned gpio)
{
uint32_t bank = PAD_BANK(gpio);
uint32_t offset = PINCTRL_DIN(bank);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
return (readl(&reg->reg) >> PAD_PIN(gpio)) & 1;
}
void gpio_set_value(unsigned gpio, int value)
{
uint32_t bank = PAD_BANK(gpio);
uint32_t offset = PINCTRL_DOUT(bank);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
if (value)
writel(1 << PAD_PIN(gpio), &reg->reg_set);
else
writel(1 << PAD_PIN(gpio), &reg->reg_clr);
}
int gpio_direction_input(unsigned gpio)
{
uint32_t bank = PAD_BANK(gpio);
uint32_t offset = PINCTRL_DOE(bank);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
writel(1 << PAD_PIN(gpio), &reg->reg_clr);
return 0;
}
int gpio_direction_output(unsigned gpio, int value)
{
uint32_t bank = PAD_BANK(gpio);
uint32_t offset = PINCTRL_DOE(bank);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE + offset);
gpio_set_value(gpio, value);
writel(1 << PAD_PIN(gpio), &reg->reg_set);
return 0;
}
int gpio_request(unsigned gpio, const char *label)
{
if (PAD_BANK(gpio) >= PINCTRL_BANKS)
return -1;
return 0;
}
int gpio_free(unsigned gpio)
{
return 0;
}
int name_to_gpio(const char *name)
{
unsigned bank, pin;
char *end;
bank = dectoul(name, &end);
if (!*end || *end != ':')
return bank;
pin = dectoul(end + 1, NULL);
return (bank << MXS_PAD_BANK_SHIFT) | (pin << MXS_PAD_PIN_SHIFT);
}
#else /* DM_GPIO */
#include <dm.h>
#include <asm/gpio.h>
#include <dt-structs.h>
#include <asm/arch/gpio.h>
#define MXS_MAX_GPIO_PER_BANK 32
DECLARE_GLOBAL_DATA_PTR;
/*
* According to i.MX28 Reference Manual:
* 'i.MX28 Applications Processor Reference Manual, Rev. 1, 2010'
* The i.MX28 has following number of GPIOs available:
* Bank 0: 0-28 -> 29 PINS
* Bank 1: 0-31 -> 32 PINS
* Bank 2: 0-27 -> 28 PINS
* Bank 3: 0-30 -> 31 PINS
* Bank 4: 0-20 -> 21 PINS
*/
struct mxs_gpio_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_fsl_imx23_gpio dtplat;
#endif
unsigned int bank;
int gpio_ranges;
};
struct mxs_gpio_priv {
unsigned int bank;
};
static int mxs_gpio_get_value(struct udevice *dev, unsigned offset)
{
struct mxs_gpio_priv *priv = dev_get_priv(dev);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE +
PINCTRL_DIN(priv->bank));
return (readl(&reg->reg) >> offset) & 1;
}
static int mxs_gpio_set_value(struct udevice *dev, unsigned offset,
int value)
{
struct mxs_gpio_priv *priv = dev_get_priv(dev);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE +
PINCTRL_DOUT(priv->bank));
if (value)
writel(BIT(offset), &reg->reg_set);
else
writel(BIT(offset), &reg->reg_clr);
return 0;
}
static int mxs_gpio_direction_input(struct udevice *dev, unsigned offset)
{
struct mxs_gpio_priv *priv = dev_get_priv(dev);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE +
PINCTRL_DOE(priv->bank));
writel(BIT(offset), &reg->reg_clr);
return 0;
}
static int mxs_gpio_direction_output(struct udevice *dev, unsigned offset,
int value)
{
struct mxs_gpio_priv *priv = dev_get_priv(dev);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE +
PINCTRL_DOE(priv->bank));
mxs_gpio_set_value(dev, offset, value);
writel(BIT(offset), &reg->reg_set);
return 0;
}
static int mxs_gpio_get_function(struct udevice *dev, unsigned offset)
{
struct mxs_gpio_priv *priv = dev_get_priv(dev);
struct mxs_register_32 *reg =
(struct mxs_register_32 *)(MXS_PINCTRL_BASE +
PINCTRL_DOE(priv->bank));
bool is_output = !!(readl(&reg->reg) >> offset);
return is_output ? GPIOF_OUTPUT : GPIOF_INPUT;
}
static const struct dm_gpio_ops gpio_mxs_ops = {
.direction_input = mxs_gpio_direction_input,
.direction_output = mxs_gpio_direction_output,
.get_value = mxs_gpio_get_value,
.set_value = mxs_gpio_set_value,
.get_function = mxs_gpio_get_function,
};
static int mxs_gpio_probe(struct udevice *dev)
{
struct mxs_gpio_plat *plat = dev_get_plat(dev);
struct mxs_gpio_priv *priv = dev_get_priv(dev);
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
char name[16], *str;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_fsl_imx23_gpio *dtplat = &plat->dtplat;
priv->bank = (unsigned int)dtplat->reg[0];
uc_priv->gpio_count = dtplat->gpio_ranges[3];
#else
priv->bank = (unsigned int)plat->bank;
uc_priv->gpio_count = plat->gpio_ranges;
#endif
snprintf(name, sizeof(name), "GPIO%d_", priv->bank);
str = strdup(name);
if (!str)
return -ENOMEM;
uc_priv->bank_name = str;
debug("%s: %s: %d pins base: 0x%x\n", __func__, uc_priv->bank_name,
uc_priv->gpio_count, priv->bank);
return 0;
}
#if CONFIG_IS_ENABLED(OF_REAL)
static int mxs_of_to_plat(struct udevice *dev)
{
struct mxs_gpio_plat *plat = dev_get_plat(dev);
struct fdtdec_phandle_args args;
int node = dev_of_offset(dev);
int ret;
plat->bank = dev_read_addr(dev);
if (plat->bank == FDT_ADDR_T_NONE) {
printf("%s: No 'reg' property defined!\n", __func__);
return -EINVAL;
}
ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, node, "gpio-ranges",
NULL, 3, 0, &args);
if (ret)
printf("%s: 'gpio-ranges' not defined - using default!\n",
__func__);
plat->gpio_ranges = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
return 0;
}
static const struct udevice_id mxs_gpio_ids[] = {
{ .compatible = "fsl,imx23-gpio" },
{ .compatible = "fsl,imx28-gpio" },
{ }
};
#endif
U_BOOT_DRIVER(fsl_imx23_gpio) = {
.name = "fsl_imx23_gpio",
.id = UCLASS_GPIO,
.ops = &gpio_mxs_ops,
.probe = mxs_gpio_probe,
.priv_auto = sizeof(struct mxs_gpio_priv),
.plat_auto = sizeof(struct mxs_gpio_plat),
#if CONFIG_IS_ENABLED(OF_REAL)
.of_match = mxs_gpio_ids,
.of_to_plat = mxs_of_to_plat,
#endif
};
DM_DRIVER_ALIAS(fsl_imx23_gpio, fsl_imx28_gpio)
#endif /* DM_GPIO */
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