sdm845: Add GPIO API

Introduces new and required GPIO APIs, using common pinmux
definitions for GPIO configuration.

TEST=build & run

Change-Id: I8cef9dae2072da32cb0678efefeb8f0070cdde9c
Signed-off-by: David Dai <daidavid1@codeaurora.org>
Reviewed-on: https://review.coreboot.org/26233
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

1 files changed, 76 insertions, 0 deletions

diff --git a/src/soc/qualcomm/sdm845/gpio.c b/src/soc/qualcomm/sdm845/gpio.c
new file mode 100644
index 0000000000..edbb3b98fa
--- /dev/null
+++ b/src/soc/qualcomm/sdm845/gpio.c
@@ -0,0 +1,76 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Qualcomm 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 <types.h>
+#include <console/console.h>
+#include <delay.h>
+#include <timer.h>
+#include <timestamp.h>
+
+#include <gpio.h>
+
+void gpio_configure(gpio_t gpio, uint32_t func, uint32_t pull,
+				uint32_t drive_str, uint32_t enable)
+{
+	uint32_t reg_val;
+	struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
+
+	reg_val = ((enable & GPIO_CFG_OE_BMSK) << GPIO_CFG_OE_SHFT) |
+		  ((drive_str & GPIO_CFG_DRV_BMSK) << GPIO_CFG_DRV_SHFT) |
+		  ((func & GPIO_CFG_FUNC_BMSK) << GPIO_CFG_FUNC_SHFT) |
+		  ((pull & GPIO_CFG_PULL_BMSK) << GPIO_CFG_PULL_SHFT);
+
+	write32(&regs->cfg, reg_val);
+}
+
+void gpio_set(gpio_t gpio, int value)
+{
+	struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
+	write32(&regs->in_out, (!!value) << GPIO_IO_OUT_SHFT);
+}
+
+int gpio_get(gpio_t gpio)
+{
+	struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
+
+	return ((read32(&regs->in_out) >> GPIO_IO_IN_SHFT) &
+		GPIO_IO_IN_BMSK);
+}
+
+void gpio_input_pulldown(gpio_t gpio)
+{
+	gpio_configure(gpio, GPIO_FUNC_DISABLE,
+				GPIO_PULL_DOWN, GPIO_2MA, GPIO_DISABLE);
+}
+
+void gpio_input_pullup(gpio_t gpio)
+{
+	gpio_configure(gpio, GPIO_FUNC_DISABLE,
+				GPIO_PULL_UP, GPIO_2MA, GPIO_DISABLE);
+}
+
+void gpio_input(gpio_t gpio)
+{
+	gpio_configure(gpio, GPIO_FUNC_DISABLE,
+				GPIO_NO_PULL, GPIO_2MA, GPIO_DISABLE);
+}
+
+void gpio_output(gpio_t gpio, int value)
+{
+	gpio_set(gpio, value);
+	gpio_configure(gpio, GPIO_FUNC_DISABLE,
+				GPIO_NO_PULL, GPIO_2MA, GPIO_ENABLE);
+}