Commit 0c442298 authored by Ajay Bhargav's avatar Ajay Bhargav Committed by Albert ARIBAUD
Browse files

gpio: Add GPIO driver framework for Marvell SoCs



This patch adds generic GPIO driver framework support for Marvell SoCs.

To enable GPIO driver define CONFIG_MARVELL_GPIO and for GPIO commands
define CONFIG_CMD_GPIO in your board configuration file.
Signed-off-by: default avatarAjay Bhargav <ajay.bhargav@einfochips.com>
parent 1d5e7fb4
......@@ -27,6 +27,7 @@ LIB := $(obj)libgpio.o
COBJS-$(CONFIG_AT91_GPIO) += at91_gpio.o
COBJS-$(CONFIG_KIRKWOOD_GPIO) += kw_gpio.o
COBJS-$(CONFIG_MARVELL_GPIO) += mvgpio.o
COBJS-$(CONFIG_MARVELL_MFP) += mvmfp.o
COBJS-$(CONFIG_MXC_GPIO) += mxc_gpio.o
COBJS-$(CONFIG_PCA953X) += pca953x.o
......
/*
* (C) Copyright 2011
* eInfochips Ltd. <www.einfochips.com>
* Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
*
* (C) Copyright 2010
* Marvell Semiconductor <www.marvell.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/errno.h>
#include "mvgpio.h"
#include <asm/gpio.h>
#ifndef MV_MAX_GPIO
#define MV_MAX_GPIO 128
#endif
int gpio_request(int gp, const char *label)
{
if (gp >= MV_MAX_GPIO) {
printf("%s: Invalid GPIO requested %d\n", __func__, gp);
return -EINVAL;
}
return 0;
}
void gpio_free(int gp)
{
}
void gpio_toggle_value(int gp)
{
gpio_set_value(gp, !gpio_get_value(gp));
}
int gpio_direction_input(int gp)
{
struct gpio_reg *gpio_reg_bank;
if (gp >= MV_MAX_GPIO) {
printf("%s: Invalid GPIO %d\n", __func__, gp);
return -EINVAL;
}
gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gcdr);
return 0;
}
int gpio_direction_output(int gp, int value)
{
struct gpio_reg *gpio_reg_bank;
if (gp >= MV_MAX_GPIO) {
printf("%s: Invalid GPIO %d\n", __func__, gp);
return -EINVAL;
}
gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gsdr);
gpio_set_value(gp, value);
return 0;
}
int gpio_get_value(int gp)
{
struct gpio_reg *gpio_reg_bank;
u32 gp_val;
if (gp >= MV_MAX_GPIO) {
printf("%s: Invalid GPIO %d\n", __func__, gp);
return -EINVAL;
}
gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
gp_val = readl(&gpio_reg_bank->gplr);
return GPIO_VAL(gp, gp_val);
}
void gpio_set_value(int gp, int value)
{
struct gpio_reg *gpio_reg_bank;
if (gp >= MV_MAX_GPIO) {
printf("%s: Invalid GPIO %d\n", __func__, gp);
return;
}
gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
if (value)
writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpsr);
else
writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpcr);
}
/*
* (C) Copyright 2011
* eInfochips Ltd. <www.einfochips.com>
* Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
*
* (C) Copyright 2010
* Marvell Semiconductor <www.marvell.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#ifndef __MVGPIO_H__
#define __MVGPIO_H__
#include <common.h>
#ifdef CONFIG_SHEEVA_88SV331xV5
/*
* GPIO Register map for SHEEVA 88SV331xV5
*/
struct gpio_reg {
u32 gplr; /* Pin Level Register - 0x0000 */
u32 pad0[2];
u32 gpdr; /* Pin Direction Register - 0x000C */
u32 pad1[2];
u32 gpsr; /* Pin Output Set Register - 0x0018 */
u32 pad2[2];
u32 gpcr; /* Pin Output Clear Register - 0x0024 */
u32 pad3[2];
u32 grer; /* Rising-Edge Detect Enable Register - 0x0030 */
u32 pad4[2];
u32 gfer; /* Falling-Edge Detect Enable Register - 0x003C */
u32 pad5[2];
u32 gedr; /* Edge Detect Status Register - 0x0048 */
u32 pad6[2];
u32 gsdr; /* Bitwise Set of GPIO Direction Register - 0x0054 */
u32 pad7[2];
u32 gcdr; /* Bitwise Clear of GPIO Direction Register - 0x0060 */
u32 pad8[2];
u32 gsrer; /* Bitwise Set of Rising-Edge Detect Enable
Register - 0x006C */
u32 pad9[2];
u32 gcrer; /* Bitwise Clear of Rising-Edge Detect Enable
Register - 0x0078 */
u32 pad10[2];
u32 gsfer; /* Bitwise Set of Falling-Edge Detect Enable
Register - 0x0084 */
u32 pad11[2];
u32 gcfer; /* Bitwise Clear of Falling-Edge Detect Enable
Register - 0x0090 */
u32 pad12[2];
u32 apmask; /* Bitwise Mask of Edge Detect Register - 0x009C */
};
#else
#error "CPU core subversion not defined"
#endif
#endif /* __MVGPIO_H__ */
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment