dm: Move OMAP GPIO driver to drivers/gpio/

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: U-Boot DM <u-boot-dm@lists.denx.de>
Cc: Tom Rini <trini@ti.com>
Acked-by: Tom Rini <trini@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>

1 files changed, 243 insertions, 0 deletions

diff --git a/drivers/gpio/omap_gpio.c b/drivers/gpio/omap_gpio.c
new file mode 100644
index 0000000000..fc89f2a42b
--- /dev/null
+++ b/drivers/gpio/omap_gpio.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2009 Wind River Systems, Inc.
+ * Tom Rix <Tom.Rix@windriver.com>
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * This work is derived from the linux 2.6.27 kernel source
+ * To fetch, use the kernel repository
+ * git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
+ * Use the v2.6.27 tag.
+ *
+ * Below is the original's header including its copyright
+ *
+ *  linux/arch/arm/plat-omap/gpio.c
+ *
+ * Support functions for OMAP GPIO
+ *
+ * Copyright (C) 2003-2005 Nokia Corporation
+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <common.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+
+#define OMAP_GPIO_DIR_OUT	0
+#define OMAP_GPIO_DIR_IN	1
+
+static inline const struct gpio_bank *get_gpio_bank(int gpio)
+{
+	return &omap_gpio_bank[gpio >> 5];
+}
+
+static inline int get_gpio_index(int gpio)
+{
+	return gpio & 0x1f;
+}
+
+static inline int gpio_valid(int gpio)
+{
+	if (gpio < 0)
+		return -1;
+	if (gpio < 192)
+		return 0;
+	return -1;
+}
+
+static int check_gpio(int gpio)
+{
+	if (gpio_valid(gpio) < 0) {
+		printf("ERROR : check_gpio: invalid GPIO %d\n", gpio);
+		return -1;
+	}
+	return 0;
+}
+
+static void _set_gpio_direction(const struct gpio_bank *bank, int gpio,
+				int is_input)
+{
+	void *reg = bank->base;
+	u32 l;
+
+	switch (bank->method) {
+	case METHOD_GPIO_24XX:
+		reg += OMAP_GPIO_OE;
+		break;
+	default:
+		return;
+	}
+	l = __raw_readl(reg);
+	if (is_input)
+		l |= 1 << gpio;
+	else
+		l &= ~(1 << gpio);
+	__raw_writel(l, reg);
+}
+
+/**
+ * Get the direction of the GPIO by reading the GPIO_OE register
+ * corresponding to the specified bank.
+ */
+static int _get_gpio_direction(const struct gpio_bank *bank, int gpio)
+{
+	void *reg = bank->base;
+	u32 v;
+
+	switch (bank->method) {
+	case METHOD_GPIO_24XX:
+		reg += OMAP_GPIO_OE;
+		break;
+	default:
+		return -1;
+	}
+
+	v = __raw_readl(reg);
+
+	if (v & (1 << gpio))
+		return OMAP_GPIO_DIR_IN;
+	else
+		return OMAP_GPIO_DIR_OUT;
+}
+
+static void _set_gpio_dataout(const struct gpio_bank *bank, int gpio,
+				int enable)
+{
+	void *reg = bank->base;
+	u32 l = 0;
+
+	switch (bank->method) {
+	case METHOD_GPIO_24XX:
+		if (enable)
+			reg += OMAP_GPIO_SETDATAOUT;
+		else
+			reg += OMAP_GPIO_CLEARDATAOUT;
+		l = 1 << gpio;
+		break;
+	default:
+		printf("omap3-gpio unknown bank method %s %d\n",
+		       __FILE__, __LINE__);
+		return;
+	}
+	__raw_writel(l, reg);
+}
+
+/**
+ * Set value of the specified gpio
+ */
+int gpio_set_value(unsigned gpio, int value)
+{
+	const struct gpio_bank *bank;
+
+	if (check_gpio(gpio) < 0)
+		return -1;
+	bank = get_gpio_bank(gpio);
+	_set_gpio_dataout(bank, get_gpio_index(gpio), value);
+
+	return 0;
+}
+
+/**
+ * Get value of the specified gpio
+ */
+int gpio_get_value(unsigned gpio)
+{
+	const struct gpio_bank *bank;
+	void *reg;
+	int input;
+
+	if (check_gpio(gpio) < 0)
+		return -1;
+	bank = get_gpio_bank(gpio);
+	reg = bank->base;
+	switch (bank->method) {
+	case METHOD_GPIO_24XX:
+		input = _get_gpio_direction(bank, get_gpio_index(gpio));
+		switch (input) {
+		case OMAP_GPIO_DIR_IN:
+			reg += OMAP_GPIO_DATAIN;
+			break;
+		case OMAP_GPIO_DIR_OUT:
+			reg += OMAP_GPIO_DATAOUT;
+			break;
+		default:
+			return -1;
+		}
+		break;
+	default:
+		return -1;
+	}
+	return (__raw_readl(reg)
+			& (1 << get_gpio_index(gpio))) != 0;
+}
+
+/**
+ * Set gpio direction as input
+ */
+int gpio_direction_input(unsigned gpio)
+{
+	const struct gpio_bank *bank;
+
+	if (check_gpio(gpio) < 0)
+		return -1;
+
+	bank = get_gpio_bank(gpio);
+	_set_gpio_direction(bank, get_gpio_index(gpio), 1);
+
+	return 0;
+}
+
+/**
+ * Set gpio direction as output
+ */
+int gpio_direction_output(unsigned gpio, int value)
+{
+	const struct gpio_bank *bank;
+
+	if (check_gpio(gpio) < 0)
+		return -1;
+
+	bank = get_gpio_bank(gpio);
+	_set_gpio_dataout(bank, get_gpio_index(gpio), value);
+	_set_gpio_direction(bank, get_gpio_index(gpio), 0);
+
+	return 0;
+}
+
+/**
+ * Request a gpio before using it.
+ *
+ * NOTE: Argument 'label' is unused.
+ */
+int gpio_request(unsigned gpio, const char *label)
+{
+	if (check_gpio(gpio) < 0)
+		return -1;
+
+	return 0;
+}
+
+/**
+ * Reset and free the gpio after using it.
+ */
+int gpio_free(unsigned gpio)
+{
+	return 0;
+}