mediatek/mt8173: Add GPIO driver

BUG=none
TEST=emerge-oak coreboot
BRANCH=none

Change-Id: I54755d81144b27cc9a674434609b2d99f1d486ec
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: d88a3ed43ad32e245e54a9599fb8667ce288217b
Original-Change-Id: I1142091650c0de2207c7635031aa7edfe487ad88
Original-Signed-off-by: Biao Huang <biao.huang@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292672
Original-Commit-Ready: Yidi Lin <yidi.lin@mediatek.com>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12603
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 92 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8173/include/soc/gpio.h b/src/soc/mediatek/mt8173/include/soc/gpio.h
new file mode 100644
index 0000000000..d0a3dd2875
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/gpio.h
@@ -0,0 +1,92 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 MediaTek 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef SOC_MEDIATEK_MT8173_GPIO_H
+#define SOC_MEDIATEK_MT8173_GPIO_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <soc/addressmap.h>
+
+enum pull_enable {
+	GPIO_PULL_DISABLE = 0,
+	GPIO_PULL_ENABLE = 1,
+};
+
+enum pull_select {
+	GPIO_PULL_DOWN = 0,
+	GPIO_PULL_UP = 1,
+};
+
+enum external_power {
+	GPIO_EINT_3P3V = 0,
+	GPIO_EINT_1P8V = 1,
+};
+
+typedef u32 gpio_t;
+
+struct val_regs {
+	uint16_t val;
+	uint16_t align1;
+	uint16_t set;
+	uint16_t align2;
+	uint16_t rst;
+	uint16_t align3[3];
+};
+
+struct gpio_regs {
+	struct val_regs dir[9];
+	uint8_t rsv00[112];
+	struct val_regs pullen[9];
+	uint8_t rsv01[112];
+	struct val_regs pullsel[9];
+	uint8_t rsv02[112];
+	uint8_t rsv03[256];
+	struct val_regs dout[9];
+	uint8_t rsv04[112];
+	struct val_regs din[9];
+	uint8_t rsv05[112];
+	struct val_regs mode[27];
+	uint8_t rsv06[336];
+	struct val_regs ies[3];
+	struct val_regs smt[3];
+	uint8_t rsv07[160];
+	struct val_regs tdsel[8];
+	struct val_regs rdsel[6];
+	uint8_t rsv08[32];
+	struct val_regs drv_mode[10];
+	uint8_t rsv09[96];
+	struct val_regs msdc_rsv0[11];
+	struct val_regs msdc2_ctrl5;
+	struct val_regs msdc_rsv1[12];
+	uint8_t rsv10[64];
+	struct val_regs exmd_ctrl[1];
+	uint8_t rsv11[48];
+	struct val_regs kpad_ctrl[2];
+	struct val_regs hsic_ctrl[4];
+};
+
+check_member(gpio_regs, msdc2_ctrl5, 0xcb0);
+check_member(gpio_regs, hsic_ctrl[3], 0xe50);
+
+static struct gpio_regs *const mt8173_gpio = (void *)(GPIO_BASE);
+
+void gpio_set_pull(gpio_t gpio, enum pull_enable enable,
+		   enum pull_select select);
+void gpio_set_mode(gpio_t gpio, int mode);
+#endif /* SOC_MEDIATEK_MT8173_GPIO_H */