This patch adds generic GPIO driver framework support for Marvell SoCs.
To enable GPIO driver define CONFIG_MV_GPIO and for GPIO commands
define CONFIG_CMD_GPIO in your board configuration file.
Signed-off-by: Ajay Bhargav <ajay.bhar...@einfochips.com>
---
drivers/gpio/Makefile | 1 +
drivers/gpio/mvgpio.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++
include/mvgpio.h | 52 ++++++++++++++++++++
3 files changed, 178 insertions(+), 0 deletions(-)
create mode 100644 drivers/gpio/mvgpio.c
create mode 100644 include/mvgpio.h
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 62ec97d..c6f652f 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -28,6 +28,7 @@ LIB := $(obj)libgpio.o
COBJS-$(CONFIG_AT91_GPIO) += at91_gpio.o
COBJS-$(CONFIG_KIRKWOOD_GPIO) += kw_gpio.o
COBJS-$(CONFIG_MARVELL_MFP) += mvmfp.o
+COBJS-$(CONFIG_MV_GPIO) += mvgpio.o
COBJS-$(CONFIG_MXC_GPIO) += mxc_gpio.o
COBJS-$(CONFIG_PCA953X) += pca953x.o
COBJS-$(CONFIG_S5P) += s5p_gpio.o
diff --git a/drivers/gpio/mvgpio.c b/drivers/gpio/mvgpio.c
new file mode 100644
index 0000000..d64f0db
--- /dev/null
+++ b/drivers/gpio/mvgpio.c
@@ -0,0 +1,125 @@
+/*
+ * (C) Copyright 2011
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhar...@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 <asm/gpio.h>
+
+char gpio_names[MV_MAX_GPIO][GPIO_LABEL_MAX];
+
+static int get_gpio_base(int bank)
+{
+ switch (bank) {
+ case 0:
+ return GPIO_BANK0_BASE;
+ case 1:
+ return GPIO_BANK1_BASE;
+ case 2:
+ return GPIO_BANK2_BASE;
+ case 3:
+ return GPIO_BANK3_BASE;
+ }
+ return 0;
+}
+
+int gpio_request(int gp, const char *label)
+{
+ if (gp >= MV_MAX_GPIO)
+ return -EINVAL;
+
+ if (strlen(gpio_names[gp]) == 0) {
+ strncpy(gpio_names[gp], label, GPIO_LABEL_MAX);
+ gpio_names[gp][GPIO_LABEL_MAX - 1] = '\0';
+ } else {
+ return -EBUSY;
+ }
+ return 0;
+}
+
+void gpio_free(int gp)
+{
+ gpio_names[gp][0] = '\0';
+}
+
+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)
+ return -EINVAL;
+
+ gpio_reg_bank = (struct gpio_reg *) 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)
+ return -EINVAL;
+
+ gpio_reg_bank = (struct gpio_reg *) 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)
+ return -EINVAL;
+
+ gpio_reg_bank = (struct gpio_reg *) 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)
+ return;
+
+ gpio_reg_bank = (struct gpio_reg *) 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);
+}
diff --git a/include/mvgpio.h b/include/mvgpio.h
new file mode 100644
index 0000000..7d0258f
--- /dev/null
+++ b/include/mvgpio.h
@@ -0,0 +1,52 @@
+/*
+ * (C) Copyright 2011
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhar...@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 _MV_GPIO_H
+#define _MV_GPIO_H
+
+#include <asm/types.h>
+
+#if defined(CONFIG_MV_GPIO)
+
+#define MV_GPIO_BASE 0xD4019000
+#define GPIO_BANK0_BASE (MV_GPIO_BASE + 0x0000)
+#define GPIO_BANK1_BASE (MV_GPIO_BASE + 0x0004)
+#define GPIO_BANK2_BASE (MV_GPIO_BASE + 0x0008)
+#define GPIO_BANK3_BASE (MV_GPIO_BASE + 0x0100)
+
+#define GPIO_LABEL_MAX 20
+#define MV_MAX_GPIO 128
+
+#define GPIO_TO_REG(gp) (gp >> 5)
+#define GPIO_TO_BIT(gp) (1 << (gp & 0x1F))
+#define GPIO_VAL(gp, val) ((val >> (gp & 0x1F)) & 0x01)
+
+#define GPIO_SET 1
+#define GPIO_CLR 0
+
+#endif /* CONFIG_MV_GPIO */
+#endif /* _MV_GPIO_H */
--
1.7.0.4
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