rockchip: rk3036: Add pinctrl driver

Add a driver which support pin multiplexing setup for rk3036

Signed-off-by: Lin Huang <hl@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>

3 files changed, 286 insertions, 0 deletions

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 3b6e3b7..57e6142 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -114,6 +114,15 @@ config ROCKCHIP_PINCTRL
 	  definitions and pin control functions for each available multiplex
 	  function.
 
+config ROCKCHIP_3036_PINCTRL
+	bool "Rockchip rk3036 pin control driver"
+	depends on DM
+	help
+	  Support pin multiplexing control on Rockchip rk3036 SoCs. The driver is
+	  controlled by a device tree node which contains both the GPIO
+	  definitions and pin control functions for each available multiplex
+	  function.
+
 config PINCTRL_SANDBOX
 	bool "Sandbox pinctrl driver"
 	depends on SANDBOX
diff --git a/drivers/pinctrl/rockchip/Makefile b/drivers/pinctrl/rockchip/Makefile
index 251bace..6fa7d00 100644
--- a/drivers/pinctrl/rockchip/Makefile
+++ b/drivers/pinctrl/rockchip/Makefile
@@ -6,3 +6,4 @@
 #
 
 obj-$(CONFIG_ROCKCHIP_PINCTRL) += pinctrl_rk3288.o
+obj-$(CONFIG_ROCKCHIP_3036_PINCTRL) += pinctrl_rk3036.o
diff --git a/drivers/pinctrl/rockchip/pinctrl_rk3036.c b/drivers/pinctrl/rockchip/pinctrl_rk3036.c
new file mode 100644
index 0000000..581b096
--- /dev/null
+++ b/drivers/pinctrl/rockchip/pinctrl_rk3036.c
@@ -0,0 +1,276 @@
+/*
+ * 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>
+
+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_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,
+	.probe		= rk3036_pinctrl_probe,
+};