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/*
* (C) Copyright 2017 Rockchip Electronics Co., Ltd
* Author: Andy Yan <andy.yan@rock-chips.com>
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <syscon.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/hardware.h>
#include <asm/arch/grf_rk3368.h>
#include <asm/arch/periph.h>
#include <dm/pinctrl.h>
DECLARE_GLOBAL_DATA_PTR;
struct rk3368_pinctrl_priv {
struct rk3368_grf *grf;
struct rk3368_pmu_grf *pmugrf;
};
static void pinctrl_rk3368_uart_config(struct rk3368_pinctrl_priv *priv,
int uart_id)
{
struct rk3368_grf *grf = priv->grf;
struct rk3368_pmu_grf *pmugrf = priv->pmugrf;
switch (uart_id) {
case PERIPH_ID_UART2:
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A6_MASK | GPIO2A5_MASK,
GPIO2A6_UART2_SIN << GPIO2A6_SHIFT |
GPIO2A5_UART2_SOUT << GPIO2A5_SHIFT);
break;
case PERIPH_ID_UART0:
break;
case PERIPH_ID_UART1:
break;
case PERIPH_ID_UART3:
break;
case PERIPH_ID_UART4:
rk_clrsetreg(&pmugrf->gpio0d_iomux,
GPIO0D0_MASK | GPIO0D1_MASK |
GPIO0D2_MASK | GPIO0D3_MASK,
GPIO0D0_GPIO << GPIO0D0_SHIFT |
GPIO0D1_GPIO << GPIO0D1_SHIFT |
GPIO0D2_UART4_SOUT << GPIO0D2_SHIFT |
GPIO0D3_UART4_SIN << GPIO0D3_SHIFT);
break;
default:
debug("uart id = %d iomux error!\n", uart_id);
break;
}
}
static int rk3368_pinctrl_request(struct udevice *dev, int func, int flags)
{
struct rk3368_pinctrl_priv *priv = dev_get_priv(dev);
debug("%s: func=%d, flags=%x\n", __func__, func, flags);
switch (func) {
case PERIPH_ID_UART0:
case PERIPH_ID_UART1:
case PERIPH_ID_UART2:
case PERIPH_ID_UART3:
case PERIPH_ID_UART4:
pinctrl_rk3368_uart_config(priv, func);
break;
default:
return -EINVAL;
}
return 0;
}
static int rk3368_pinctrl_get_periph_id(struct udevice *dev,
struct udevice *periph)
{
u32 cell[3];
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[1]) {
case 59:
return PERIPH_ID_UART4;
case 58:
return PERIPH_ID_UART3;
case 57:
return PERIPH_ID_UART2;
case 56:
return PERIPH_ID_UART1;
case 55:
return PERIPH_ID_UART0;
}
return -ENOENT;
}
static int rk3368_pinctrl_set_state_simple(struct udevice *dev,
struct udevice *periph)
{
int func;
func = rk3368_pinctrl_get_periph_id(dev, periph);
if (func < 0)
return func;
return rk3368_pinctrl_request(dev, func, 0);
}
static struct pinctrl_ops rk3368_pinctrl_ops = {
.set_state_simple = rk3368_pinctrl_set_state_simple,
.request = rk3368_pinctrl_request,
.get_periph_id = rk3368_pinctrl_get_periph_id,
};
static int rk3368_pinctrl_probe(struct udevice *dev)
{
struct rk3368_pinctrl_priv *priv = dev_get_priv(dev);
int ret = 0;
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
debug("%s: grf=%p pmugrf:%p\n", __func__, priv->grf, priv->pmugrf);
return ret;
}
static const struct udevice_id rk3368_pinctrl_ids[] = {
{ .compatible = "rockchip,rk3368-pinctrl" },
{ }
};
U_BOOT_DRIVER(pinctrl_rk3368) = {
.name = "rockchip_rk3368_pinctrl",
.id = UCLASS_PINCTRL,
.of_match = rk3368_pinctrl_ids,
.priv_auto_alloc_size = sizeof(struct rk3368_pinctrl_priv),
.ops = &rk3368_pinctrl_ops,
.bind = dm_scan_fdt_dev,
.probe = rk3368_pinctrl_probe,
};
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