* Copyright (C) 2009
* Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
*
- * See file CREDITS for list of people who contributed to this
- * project.
+ * Copyright (C) 2011
+ * Stefano Babic, DENX Software Engineering, <sbabic@denx.de>
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/imx-regs.h>
+#include <asm/gpio.h>
#include <asm/io.h>
-#include <mxc_gpio.h>
+#include <errno.h>
+
+enum mxc_gpio_direction {
+ MXC_GPIO_DIRECTION_IN,
+ MXC_GPIO_DIRECTION_OUT,
+};
+
+#define GPIO_TO_PORT(n) (n / 32)
/* GPIO port description */
static unsigned long gpio_ports[] = {
[0] = GPIO1_BASE_ADDR,
[1] = GPIO2_BASE_ADDR,
[2] = GPIO3_BASE_ADDR,
-#if defined(CONFIG_MX51) || defined(CONFIG_MX53)
+#if defined(CONFIG_MX25) || defined(CONFIG_MX27) || defined(CONFIG_MX51) || \
+ defined(CONFIG_MX53) || defined(CONFIG_MX6)
[3] = GPIO4_BASE_ADDR,
#endif
-#if defined(CONFIG_MX53)
+#if defined(CONFIG_MX27) || defined(CONFIG_MX53) || defined(CONFIG_MX6)
[4] = GPIO5_BASE_ADDR,
[5] = GPIO6_BASE_ADDR,
+#endif
+#if defined(CONFIG_MX53) || defined(CONFIG_MX6)
[6] = GPIO7_BASE_ADDR,
#endif
};
-int mxc_gpio_direction(unsigned int gpio, enum mxc_gpio_direction direction)
+static int mxc_gpio_direction(unsigned int gpio,
+ enum mxc_gpio_direction direction)
{
- unsigned int port = gpio >> 5;
+ unsigned int port = GPIO_TO_PORT(gpio);
struct gpio_regs *regs;
u32 l;
if (port >= ARRAY_SIZE(gpio_ports))
- return 1;
+ return -1;
gpio &= 0x1f;
return 0;
}
-void mxc_gpio_set(unsigned int gpio, unsigned int value)
+int gpio_set_value(unsigned gpio, int value)
{
- unsigned int port = gpio >> 5;
+ unsigned int port = GPIO_TO_PORT(gpio);
struct gpio_regs *regs;
u32 l;
if (port >= ARRAY_SIZE(gpio_ports))
- return;
+ return -1;
gpio &= 0x1f;
else
l &= ~(1 << gpio);
writel(l, ®s->gpio_dr);
+
+ return 0;
}
-int mxc_gpio_get(unsigned int gpio)
+int gpio_get_value(unsigned gpio)
{
- unsigned int port = gpio >> 5;
+ unsigned int port = GPIO_TO_PORT(gpio);
struct gpio_regs *regs;
- u32 l;
+ u32 val;
if (port >= ARRAY_SIZE(gpio_ports))
return -1;
regs = (struct gpio_regs *)gpio_ports[port];
- l = (readl(®s->gpio_dr) >> gpio) & 0x01;
+ val = (readl(®s->gpio_psr) >> gpio) & 0x01;
+
+ return val;
+}
+
+int gpio_request(unsigned gpio, const char *label)
+{
+ unsigned int port = GPIO_TO_PORT(gpio);
+ if (port >= ARRAY_SIZE(gpio_ports))
+ return -1;
+ return 0;
+}
+
+int gpio_free(unsigned gpio)
+{
+ return 0;
+}
+
+int gpio_direction_input(unsigned gpio)
+{
+ return mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_IN);
+}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+ int ret = mxc_gpio_direction(gpio, MXC_GPIO_DIRECTION_OUT);
+
+ if (ret < 0)
+ return ret;
- return l;
+ return gpio_set_value(gpio, value);
}