rockchip: refactor gpio driver

The gpio of rockchip SoCs(rk3288 & rk3399) are the same IP,
moving the gpio code of rk3288 to common then can be reused on rk3399.

BRANCH=none
BUG=chrome-os-partner:51537
TEST=build and boot into chromeos on veyron_jerry

Change-Id: I10a4b9d32afe60fd52512f2ad0007e9d2785033b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 1c0c4b4b999790b0be7b0eeb70d2a7a86158f779
Original-Change-Id: If13b7760108831d81e8e8c950cdf61724d497b17
Original-Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/339846
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/14712
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

2 files changed, 139 insertions, 0 deletions

diff --git a/src/soc/rockchip/common/gpio.c b/src/soc/rockchip/common/gpio.c
new file mode 100644
index 0000000000..6f30229817
--- /dev/null
+++ b/src/soc/rockchip/common/gpio.c
@@ -0,0 +1,66 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Rockchip Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <gpio.h>
+#include <soc/gpio.h>
+#include <soc/grf.h>
+#include <soc/soc.h>
+#include <stdlib.h>
+
+enum {
+	PULLNONE = 0,
+	PULLUP,
+	PULLDOWN
+};
+
+static void __gpio_input(gpio_t gpio, u32 pull)
+{
+	clrbits_le32(&gpio_port[gpio.port]->swporta_ddr, 1 << gpio.num);
+	if (is_pmu_gpio(gpio))
+		clrsetbits_le32(gpio_grf_reg(gpio), 3 << (gpio.idx * 2),
+				pull << (gpio.idx * 2));
+	else
+		write32(gpio_grf_reg(gpio), RK_CLRSETBITS(3 << (gpio.idx * 2),
+			pull << (gpio.idx * 2)));
+}
+
+void gpio_input(gpio_t gpio)
+{
+	__gpio_input(gpio, PULLNONE);
+}
+
+void gpio_input_pulldown(gpio_t gpio)
+{
+	__gpio_input(gpio, PULLDOWN);
+}
+
+void gpio_input_pullup(gpio_t gpio)
+{
+	__gpio_input(gpio, PULLUP);
+}
+
+int gpio_get(gpio_t gpio)
+{
+	return (read32(&gpio_port[gpio.port]->ext_porta) >> gpio.num) & 0x1;
+}
+
+void gpio_output(gpio_t gpio, int value)
+{
+	setbits_le32(&gpio_port[gpio.port]->swporta_ddr, 1 << gpio.num);
+	clrsetbits_le32(&gpio_port[gpio.port]->swporta_dr, 1 << gpio.num,
+							   !!value << gpio.num);
+}
diff --git a/src/soc/rockchip/common/include/soc/gpio.h b/src/soc/rockchip/common/include/soc/gpio.h
new file mode 100644
index 0000000000..f2e7970daa
--- /dev/null
+++ b/src/soc/rockchip/common/include/soc/gpio.h
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Rockchip Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __COREBOOT_SRC_SOC_ROCKCHIP_COMMON_INCLUDE_SOC_GPIO_H
+#define __COREBOOT_SRC_SOC_ROCKCHIP_COMMON_INCLUDE_SOC_GPIO_H
+
+#include <types.h>
+
+#define GPIO(p, b, i) ((gpio_t){.port = p, .bank = GPIO_##b, .idx = i})
+
+struct rockchip_gpio_regs {
+	u32 swporta_dr;
+	u32 swporta_ddr;
+	u32 reserved0[(0x30 - 0x08) / 4];
+	u32 inten;
+	u32 intmask;
+	u32 inttype_level;
+	u32 int_polarity;
+	u32 int_status;
+	u32 int_rawstatus;
+	u32 debounce;
+	u32 porta_eoi;
+	u32 ext_porta;
+	u32 reserved1[(0x60 - 0x54) / 4];
+	u32 ls_sync;
+};
+check_member(rockchip_gpio_regs, ls_sync, 0x60);
+
+typedef union {
+	u32 raw;
+	struct {
+		u16 port;
+		union {
+			struct {
+				u16 num : 5;
+				u16 reserved1 : 11;
+			};
+			struct {
+				u16 idx : 3;
+				u16 bank : 2;
+				u16 reserved2 : 11;
+			};
+		};
+	};
+} gpio_t;
+
+enum {
+	GPIO_A = 0,
+	GPIO_B,
+	GPIO_C,
+	GPIO_D,
+};
+
+extern struct rockchip_gpio_regs *gpio_port[];
+
+/* Check if the gpio port is a pmu gpio */
+int is_pmu_gpio(gpio_t gpio);
+
+/* Return the io addr of gpio register */
+void *gpio_grf_reg(gpio_t gpio);
+#endif