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/*
* Pinctrl driver for Rockchip 3036 SoCs
* (C) Copyright 2015 Rockchip Electronics Co., Ltd
*
* 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/grf_rk3036.h>
#include <asm/arch/hardware.h>
#include <asm/arch/periph.h>
#include <dm/pinctrl.h>
#include <dm/root.h>
DECLARE_GLOBAL_DATA_PTR;
struct rk3036_pinctrl_priv {
struct rk3036_grf *grf;
};
static void pinctrl_rk3036_pwm_config(struct rk3036_grf *grf, int pwm_id)
{
switch (pwm_id) {
case PERIPH_ID_PWM0:
rk_clrsetreg(&grf->gpio0d_iomux, GPIO0D2_MASK << GPIO0D2_SHIFT,
GPIO0D2_PWM0 << GPIO0D2_SHIFT);
break;
case PERIPH_ID_PWM1:
rk_clrsetreg(&grf->gpio0a_iomux, GPIO0A0_MASK << GPIO0A0_SHIFT,
GPIO0A0_PWM1 << GPIO0A0_SHIFT);
break;
case PERIPH_ID_PWM2:
rk_clrsetreg(&grf->gpio0a_iomux, GPIO0A1_MASK << GPIO0A1_SHIFT,
GPIO0A1_PWM2 << GPIO0A1_SHIFT);
break;
case PERIPH_ID_PWM3:
rk_clrsetreg(&grf->gpio0a_iomux, GPIO0D3_MASK << GPIO0D3_SHIFT,
GPIO0D3_PWM3 << GPIO0D3_SHIFT);
break;
default:
debug("pwm id = %d iomux error!\n", pwm_id);
break;
}
}
static void pinctrl_rk3036_i2c_config(struct rk3036_grf *grf, int i2c_id)
{
switch (i2c_id) {
case PERIPH_ID_I2C0:
rk_clrsetreg(&grf->gpio0a_iomux,
GPIO0A1_MASK << GPIO0A1_SHIFT |
GPIO0A0_MASK << GPIO0A0_SHIFT,
GPIO0A1_I2C0_SDA << GPIO0A1_SHIFT |
GPIO0A0_I2C0_SCL << GPIO0A0_SHIFT);
break;
case PERIPH_ID_I2C1:
rk_clrsetreg(&grf->gpio0a_iomux,
GPIO0A3_MASK << GPIO0A3_SHIFT |
GPIO0A2_MASK << GPIO0A2_SHIFT,
GPIO0A3_I2C1_SDA << GPIO0A3_SHIFT |
GPIO0A2_I2C1_SCL << GPIO0A2_SHIFT);
break;
case PERIPH_ID_I2C2:
rk_clrsetreg(&grf->gpio2c_iomux,
GPIO2C5_MASK << GPIO2C5_SHIFT |
GPIO2C4_MASK << GPIO2C4_SHIFT,
GPIO2C5_I2C2_SCL << GPIO2C5_SHIFT |
GPIO2C4_I2C2_SDA << GPIO2C4_SHIFT);
break;
}
}
static void pinctrl_rk3036_spi_config(struct rk3036_grf *grf, int cs)
{
switch (cs) {
case 0:
rk_clrsetreg(&grf->gpio1d_iomux,
GPIO1D6_MASK << GPIO1D6_SHIFT,
GPIO1D6_SPI_CSN0 << GPIO1D6_SHIFT);
break;
case 1:
rk_clrsetreg(&grf->gpio1d_iomux,
GPIO1D7_MASK << GPIO1D7_SHIFT,
GPIO1D7_SPI_CSN1 << GPIO1D7_SHIFT);
break;
}
rk_clrsetreg(&grf->gpio1d_iomux,
GPIO1D5_MASK << GPIO1D5_SHIFT |
GPIO1D4_MASK << GPIO1D4_SHIFT,
GPIO1D5_SPI_TXD << GPIO1D5_SHIFT |
GPIO1D4_SPI_RXD << GPIO1D4_SHIFT);
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A0_MASK << GPIO2A0_SHIFT,
GPIO2A0_SPI_CLK << GPIO2A0_SHIFT);
}
static void pinctrl_rk3036_uart_config(struct rk3036_grf *grf, int uart_id)
{
switch (uart_id) {
case PERIPH_ID_UART0:
rk_clrsetreg(&grf->gpio0c_iomux,
GPIO0C3_MASK << GPIO0C3_SHIFT |
GPIO0C2_MASK << GPIO0C2_SHIFT |
GPIO0C1_MASK << GPIO0C1_SHIFT |
GPIO0C0_MASK << GPIO0C0_SHIFT,
GPIO0C3_UART0_CTSN << GPIO0C3_SHIFT |
GPIO0C2_UART0_RTSN << GPIO0C2_SHIFT |
GPIO0C1_UART0_SIN << GPIO0C1_SHIFT |
GPIO0C0_UART0_SOUT << GPIO0C0_SHIFT);
break;
case PERIPH_ID_UART1:
rk_clrsetreg(&grf->gpio2c_iomux,
GPIO2C7_MASK << GPIO2C7_SHIFT |
GPIO2C6_MASK << GPIO2C6_SHIFT,
GPIO2C7_UART1_SOUT << GPIO2C7_SHIFT |
GPIO2C6_UART1_SIN << GPIO2C6_SHIFT);
break;
case PERIPH_ID_UART2:
rk_clrsetreg(&grf->gpio1c_iomux,
GPIO1C3_MASK << GPIO1C3_SHIFT |
GPIO1C2_MASK << GPIO1C2_SHIFT,
GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT |
GPIO1C2_UART2_SIN << GPIO1C2_SHIFT);
break;
}
}
static void pinctrl_rk3036_sdmmc_config(struct rk3036_grf *grf, int mmc_id)
{
switch (mmc_id) {
case PERIPH_ID_EMMC:
rk_clrsetreg(&grf->gpio1d_iomux, 0xffff,
GPIO1D7_EMMC_D7 << GPIO1D7_SHIFT |
GPIO1D6_EMMC_D6 << GPIO1D6_SHIFT |
GPIO1D5_EMMC_D5 << GPIO1D5_SHIFT |
GPIO1D4_EMMC_D4 << GPIO1D4_SHIFT |
GPIO1D3_EMMC_D3 << GPIO1D3_SHIFT |
GPIO1D2_EMMC_D2 << GPIO1D2_SHIFT |
GPIO1D1_EMMC_D1 << GPIO1D1_SHIFT |
GPIO1D0_EMMC_D0 << GPIO1D0_SHIFT);
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A4_MASK << GPIO2A4_SHIFT |
GPIO2A1_MASK << GPIO2A1_SHIFT,
GPIO2A4_EMMC_CMD << GPIO2A4_SHIFT |
GPIO2A1_EMMC_CLKOUT << GPIO2A1_SHIFT);
break;
case PERIPH_ID_SDCARD:
rk_clrsetreg(&grf->gpio1c_iomux, 0xffff,
GPIO1C5_MMC0_D3 << GPIO1C5_SHIFT |
GPIO1C4_MMC0_D2 << GPIO1C4_SHIFT |
GPIO1C3_MMC0_D1 << GPIO1C3_SHIFT |
GPIO1C2_MMC0_D0 << GPIO1C2_SHIFT |
GPIO1C1_MMC0_DETN << GPIO1C1_SHIFT |
GPIO1C0_MMC0_CLKOUT << GPIO1C0_SHIFT);
break;
}
}
static int rk3036_pinctrl_request(struct udevice *dev, int func, int flags)
{
struct rk3036_pinctrl_priv *priv = dev_get_priv(dev);
debug("%s: func=%x, flags=%x\n", __func__, func, flags);
switch (func) {
case PERIPH_ID_PWM0:
case PERIPH_ID_PWM1:
case PERIPH_ID_PWM2:
case PERIPH_ID_PWM3:
pinctrl_rk3036_pwm_config(priv->grf, func);
break;
case PERIPH_ID_I2C0:
case PERIPH_ID_I2C1:
case PERIPH_ID_I2C2:
pinctrl_rk3036_i2c_config(priv->grf, func);
break;
case PERIPH_ID_SPI0:
pinctrl_rk3036_spi_config(priv->grf, flags);
break;
case PERIPH_ID_UART0:
case PERIPH_ID_UART1:
case PERIPH_ID_UART2:
pinctrl_rk3036_uart_config(priv->grf, func);
break;
case PERIPH_ID_SDMMC0:
case PERIPH_ID_SDMMC1:
pinctrl_rk3036_sdmmc_config(priv->grf, func);
break;
default:
return -EINVAL;
}
return 0;
}
static int rk3036_pinctrl_get_periph_id(struct udevice *dev,
struct udevice *periph)
{
u32 cell[3];
int ret;
ret = fdtdec_get_int_array(gd->fdt_blob, periph->of_offset,
"interrupts", cell, ARRAY_SIZE(cell));
if (ret < 0)
return -EINVAL;
switch (cell[1]) {
case 14:
return PERIPH_ID_SDCARD;
case 16:
return PERIPH_ID_EMMC;
case 20:
return PERIPH_ID_UART0;
case 21:
return PERIPH_ID_UART1;
case 22:
return PERIPH_ID_UART2;
case 23:
return PERIPH_ID_SPI0;
case 24:
return PERIPH_ID_I2C0;
case 25:
return PERIPH_ID_I2C1;
case 26:
return PERIPH_ID_I2C2;
case 30:
return PERIPH_ID_PWM0;
}
return -ENOENT;
}
static int rk3036_pinctrl_set_state_simple(struct udevice *dev,
struct udevice *periph)
{
int func;
func = rk3036_pinctrl_get_periph_id(dev, periph);
if (func < 0)
return func;
return rk3036_pinctrl_request(dev, func, 0);
}
static struct pinctrl_ops rk3036_pinctrl_ops = {
.set_state_simple = rk3036_pinctrl_set_state_simple,
.request = rk3036_pinctrl_request,
.get_periph_id = rk3036_pinctrl_get_periph_id,
};
static int rk3036_pinctrl_bind(struct udevice *dev)
{
/* scan child GPIO banks */
return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
}
static int rk3036_pinctrl_probe(struct udevice *dev)
{
struct rk3036_pinctrl_priv *priv = dev_get_priv(dev);
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
debug("%s: grf=%p\n", __func__, priv->grf);
return 0;
}
static const struct udevice_id rk3036_pinctrl_ids[] = {
{ .compatible = "rockchip,rk3036-pinctrl" },
{ }
};
U_BOOT_DRIVER(pinctrl_rk3036) = {
.name = "pinctrl_rk3036",
.id = UCLASS_PINCTRL,
.of_match = rk3036_pinctrl_ids,
.priv_auto_alloc_size = sizeof(struct rk3036_pinctrl_priv),
.ops = &rk3036_pinctrl_ops,
.bind = rk3036_pinctrl_bind,
.probe = rk3036_pinctrl_probe,
};
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