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/*
* Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <asm/io.h>
#include <dm/pinctrl.h>
#include <mach/ar71xx_regs.h>
DECLARE_GLOBAL_DATA_PTR;
enum periph_id {
PERIPH_ID_UART0,
PERIPH_ID_SPI0,
PERIPH_ID_NONE = -1,
};
struct ar933x_pinctrl_priv {
void __iomem *regs;
};
static void pinctrl_ar933x_spi_config(struct ar933x_pinctrl_priv *priv, int cs)
{
switch (cs) {
case 0:
clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE,
AR933X_GPIO(4), AR933X_GPIO(3) |
AR933X_GPIO(5) | AR933X_GPIO(2));
setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC,
AR933X_GPIO_FUNC_SPI_EN |
AR933X_GPIO_FUNC_RES_TRUE);
break;
}
}
static void pinctrl_ar933x_uart_config(struct ar933x_pinctrl_priv *priv, int uart_id)
{
switch (uart_id) {
case PERIPH_ID_UART0:
clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE,
AR933X_GPIO(9), AR933X_GPIO(10));
setbits_be32(priv->regs + AR71XX_GPIO_REG_FUNC,
AR933X_GPIO_FUNC_UART_EN |
AR933X_GPIO_FUNC_RES_TRUE);
break;
}
}
static int ar933x_pinctrl_request(struct udevice *dev, int func, int flags)
{
struct ar933x_pinctrl_priv *priv = dev_get_priv(dev);
debug("%s: func=%x, flags=%x\n", __func__, func, flags);
switch (func) {
case PERIPH_ID_SPI0:
pinctrl_ar933x_spi_config(priv, flags);
break;
case PERIPH_ID_UART0:
pinctrl_ar933x_uart_config(priv, func);
break;
default:
return -EINVAL;
}
return 0;
}
static int ar933x_pinctrl_get_periph_id(struct udevice *dev,
struct udevice *periph)
{
u32 cell[2];
int ret;
ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(periph),
"interrupts", cell, ARRAY_SIZE(cell));
if (ret < 0)
return -EINVAL;
switch (cell[0]) {
case 128:
return PERIPH_ID_UART0;
case 129:
return PERIPH_ID_SPI0;
}
return -ENOENT;
}
static int ar933x_pinctrl_set_state_simple(struct udevice *dev,
struct udevice *periph)
{
int func;
func = ar933x_pinctrl_get_periph_id(dev, periph);
if (func < 0)
return func;
return ar933x_pinctrl_request(dev, func, 0);
}
static struct pinctrl_ops ar933x_pinctrl_ops = {
.set_state_simple = ar933x_pinctrl_set_state_simple,
.request = ar933x_pinctrl_request,
.get_periph_id = ar933x_pinctrl_get_periph_id,
};
static int ar933x_pinctrl_probe(struct udevice *dev)
{
struct ar933x_pinctrl_priv *priv = dev_get_priv(dev);
fdt_addr_t addr;
addr = devfdt_get_addr(dev);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
priv->regs = map_physmem(addr,
AR71XX_GPIO_SIZE,
MAP_NOCACHE);
return 0;
}
static const struct udevice_id ar933x_pinctrl_ids[] = {
{ .compatible = "qca,ar933x-pinctrl" },
{ }
};
U_BOOT_DRIVER(pinctrl_ar933x) = {
.name = "pinctrl_ar933x",
.id = UCLASS_PINCTRL,
.of_match = ar933x_pinctrl_ids,
.priv_auto_alloc_size = sizeof(struct ar933x_pinctrl_priv),
.ops = &ar933x_pinctrl_ops,
.probe = ar933x_pinctrl_probe,
};
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