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u-boot/drivers/pinctrl/rockchip/pinctrl_rk3328.c
Kever Yang 077eb31514 rockchip: pinctrl: rk3328: do not set io routing 
In rk3328, some function pin may have more than one choice, and muxed
with more than one IO, for example, the UART2 controller IO,
TX and RX, have 3 choice(setting in com_iomux):
- M0 which mux with GPIO1A0/GPIO1A1
- M1 which mux with GPIO2A0/GPIO2A1
- usb2phy which mux with USB2.0 DP/DM pin.

We should not decide which group to use in pinctrl driver,
for it may be different in different board, it should goes to board
file, and the pinctrl file should setting correct iomux depends on
the com_iomux value.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
2017-06-07 07:29:21 -06:00

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/*
* (C) Copyright 2016 Rockchip Electronics Co., Ltd
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <syscon.h>
#include <asm/arch/clock.h>
#include <asm/arch/hardware.h>
#include <asm/arch/grf_rk3328.h>
#include <asm/arch/periph.h>
#include <asm/io.h>
#include <dm/pinctrl.h>
DECLARE_GLOBAL_DATA_PTR;
struct rk3328_pinctrl_priv {
struct rk3328_grf_regs *grf;
};
static void pinctrl_rk3328_pwm_config(struct rk3328_grf_regs *grf, int pwm_id)
{
switch (pwm_id) {
case PERIPH_ID_PWM0:
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A4_SEL_MASK,
GPIO2A4_PWM_0 << GPIO2A4_SEL_SHIFT);
break;
case PERIPH_ID_PWM1:
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A5_SEL_MASK,
GPIO2A5_PWM_1 << GPIO2A5_SEL_SHIFT);
break;
case PERIPH_ID_PWM2:
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A6_SEL_MASK,
GPIO2A6_PWM_2 << GPIO2A6_SEL_SHIFT);
break;
case PERIPH_ID_PWM3:
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A2_SEL_MASK,
GPIO2A2_PWM_IR << GPIO2A2_SEL_SHIFT);
break;
default:
debug("pwm id = %d iomux error!\n", pwm_id);
break;
}
}
static void pinctrl_rk3328_i2c_config(struct rk3328_grf_regs *grf, int i2c_id)
{
switch (i2c_id) {
case PERIPH_ID_I2C0:
rk_clrsetreg(&grf->gpio2d_iomux,
GPIO2D0_SEL_MASK | GPIO2D1_SEL_MASK,
GPIO2D0_I2C0_SCL << GPIO2D0_SEL_SHIFT |
GPIO2D1_I2C0_SDA << GPIO2D1_SEL_SHIFT);
break;
case PERIPH_ID_I2C1:
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A4_SEL_MASK | GPIO2A5_SEL_MASK,
GPIO2A5_I2C1_SCL << GPIO2A5_SEL_SHIFT |
GPIO2A4_I2C1_SDA << GPIO2A4_SEL_SHIFT);
break;
case PERIPH_ID_I2C2:
rk_clrsetreg(&grf->gpio2bl_iomux,
GPIO2BL5_SEL_MASK | GPIO2BL6_SEL_MASK,
GPIO2BL6_I2C2_SCL << GPIO2BL6_SEL_SHIFT |
GPIO2BL5_I2C2_SDA << GPIO2BL5_SEL_SHIFT);
break;
case PERIPH_ID_I2C3:
rk_clrsetreg(&grf->gpio0a_iomux,
GPIO0A5_SEL_MASK | GPIO0A6_SEL_MASK,
GPIO0A5_I2C3_SCL << GPIO0A5_SEL_SHIFT |
GPIO0A6_I2C3_SDA << GPIO0A6_SEL_SHIFT);
break;
default:
debug("i2c id = %d iomux error!\n", i2c_id);
break;
}
}
static void pinctrl_rk3328_lcdc_config(struct rk3328_grf_regs *grf, int lcd_id)
{
switch (lcd_id) {
case PERIPH_ID_LCDC0:
break;
default:
debug("lcdc id = %d iomux error!\n", lcd_id);
break;
}
}
static int pinctrl_rk3328_spi_config(struct rk3328_grf_regs *grf,
enum periph_id spi_id, int cs)
{
u32 com_iomux = readl(&grf->com_iomux);
if ((com_iomux & IOMUX_SEL_SPI_MASK) !=
IOMUX_SEL_SPI_M0 << IOMUX_SEL_SPI_SHIFT) {
debug("driver do not support iomux other than m0\n");
goto err;
}
switch (spi_id) {
case PERIPH_ID_SPI0:
switch (cs) {
case 0:
rk_clrsetreg(&grf->gpio2bl_iomux,
GPIO2BL3_SEL_MASK,
GPIO2BL3_SPI_CSN0_M0
<< GPIO2BL3_SEL_SHIFT);
break;
case 1:
rk_clrsetreg(&grf->gpio2bl_iomux,
GPIO2BL4_SEL_MASK,
GPIO2BL4_SPI_CSN1_M0
<< GPIO2BL4_SEL_SHIFT);
break;
default:
goto err;
}
rk_clrsetreg(&grf->gpio2bl_iomux,
GPIO2BL0_SEL_MASK,
GPIO2BL0_SPI_CLK_TX_RX_M0 << GPIO2BL0_SEL_SHIFT);
break;
default:
goto err;
}
return 0;
err:
debug("rkspi: periph%d cs=%d not supported", spi_id, cs);
return -ENOENT;
}
static void pinctrl_rk3328_uart_config(struct rk3328_grf_regs *grf, int uart_id)
{
u32 com_iomux = readl(&grf->com_iomux);
switch (uart_id) {
case PERIPH_ID_UART2:
break;
if (com_iomux & IOMUX_SEL_UART2_MASK)
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A0_SEL_MASK | GPIO2A1_SEL_MASK,
GPIO2A0_UART2_TX_M1 << GPIO2A0_SEL_SHIFT |
GPIO2A1_UART2_RX_M1 << GPIO2A1_SEL_SHIFT);
break;
case PERIPH_ID_UART0:
case PERIPH_ID_UART1:
case PERIPH_ID_UART3:
case PERIPH_ID_UART4:
default:
debug("uart id = %d iomux error!\n", uart_id);
break;
}
}
static void pinctrl_rk3328_sdmmc_config(struct rk3328_grf_regs *grf,
int mmc_id)
{
u32 com_iomux = readl(&grf->com_iomux);
switch (mmc_id) {
case PERIPH_ID_EMMC:
rk_clrsetreg(&grf->gpio0a_iomux,
GPIO0A7_SEL_MASK,
GPIO0A7_EMMC_DATA0 << GPIO0A7_SEL_SHIFT);
rk_clrsetreg(&grf->gpio2d_iomux,
GPIO2D4_SEL_MASK,
GPIO2D4_EMMC_DATA1234 << GPIO2D4_SEL_SHIFT);
rk_clrsetreg(&grf->gpio3c_iomux,
GPIO3C0_SEL_MASK,
GPIO3C0_EMMC_DATA567_PWR_CLK_RSTN_CMD
<< GPIO3C0_SEL_SHIFT);
break;
case PERIPH_ID_SDCARD:
/* SDMMC_PWREN use GPIO and init as regulator-fiexed */
if (com_iomux & IOMUX_SEL_SDMMC_MASK)
rk_clrsetreg(&grf->gpio0d_iomux,
GPIO0D6_SEL_MASK,
GPIO0D6_SDMMC0_PWRENM1
<< GPIO0D6_SEL_SHIFT);
else
rk_clrsetreg(&grf->gpio2a_iomux,
GPIO2A7_SEL_MASK,
GPIO2A7_SDMMC0_PWRENM0
<< GPIO2A7_SEL_SHIFT);
rk_clrsetreg(&grf->gpio1a_iomux,
GPIO1A0_SEL_MASK,
GPIO1A0_CARD_DATA_CLK_CMD_DETN
<< GPIO1A0_SEL_SHIFT);
break;
default:
debug("mmc id = %d iomux error!\n", mmc_id);
break;
}
}
static int rk3328_pinctrl_request(struct udevice *dev, int func, int flags)
{
struct rk3328_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_rk3328_pwm_config(priv->grf, func);
break;
case PERIPH_ID_I2C0:
case PERIPH_ID_I2C1:
case PERIPH_ID_I2C2:
case PERIPH_ID_I2C3:
pinctrl_rk3328_i2c_config(priv->grf, func);
break;
case PERIPH_ID_SPI0:
pinctrl_rk3328_spi_config(priv->grf, func, flags);
break;
case PERIPH_ID_UART0:
case PERIPH_ID_UART1:
case PERIPH_ID_UART2:
case PERIPH_ID_UART3:
case PERIPH_ID_UART4:
pinctrl_rk3328_uart_config(priv->grf, func);
break;
case PERIPH_ID_LCDC0:
case PERIPH_ID_LCDC1:
pinctrl_rk3328_lcdc_config(priv->grf, func);
break;
case PERIPH_ID_SDMMC0:
case PERIPH_ID_SDMMC1:
pinctrl_rk3328_sdmmc_config(priv->grf, func);
break;
default:
return -EINVAL;
}
return 0;
}
static int rk3328_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 49:
return PERIPH_ID_SPI0;
case 50:
return PERIPH_ID_PWM0;
case 36:
return PERIPH_ID_I2C0;
case 37: /* Note strange order */
return PERIPH_ID_I2C1;
case 38:
return PERIPH_ID_I2C2;
case 39:
return PERIPH_ID_I2C3;
case 12:
return PERIPH_ID_SDCARD;
case 14:
return PERIPH_ID_EMMC;
}
return -ENOENT;
}
static int rk3328_pinctrl_set_state_simple(struct udevice *dev,
struct udevice *periph)
{
int func;
func = rk3328_pinctrl_get_periph_id(dev, periph);
if (func < 0)
return func;
return rk3328_pinctrl_request(dev, func, 0);
}
static struct pinctrl_ops rk3328_pinctrl_ops = {
.set_state_simple = rk3328_pinctrl_set_state_simple,
.request = rk3328_pinctrl_request,
.get_periph_id = rk3328_pinctrl_get_periph_id,
};
static int rk3328_pinctrl_probe(struct udevice *dev)
{
struct rk3328_pinctrl_priv *priv = dev_get_priv(dev);
int ret = 0;
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
debug("%s: grf=%p\n", __func__, priv->grf);
return ret;
}
static const struct udevice_id rk3328_pinctrl_ids[] = {
{ .compatible = "rockchip,rk3328-pinctrl" },
{ }
};
U_BOOT_DRIVER(pinctrl_rk3328) = {
.name = "rockchip_rk3328_pinctrl",
.id = UCLASS_PINCTRL,
.of_match = rk3328_pinctrl_ids,
.priv_auto_alloc_size = sizeof(struct rk3328_pinctrl_priv),
.ops = &rk3328_pinctrl_ops,
.bind = dm_scan_fdt_dev,
.probe = rk3328_pinctrl_probe,
};
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