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authorDieter Kiermaier <dk-arm-linux@gmx.de>2009-06-29 14:45:08 +0200
committerJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2009-07-23 00:19:28 +0200
commitec16441085f471c03a8c0909579463e31e5b947a (patch)
treee5ff996bebfac324a332c2754d565017de7b1e68 /include/asm-arm
parent688b6a0ff2dcbb0c7e63ef63cbbcc291f14f321f (diff)
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Kirkwood: add Marvell Kirkwood gpio driver
Signed-off-by: Dieter Kiermaier <dk-arm-linux@gmx.de> Acked-by: Prafulla Wadaskar <prafulla@marvell.com> Tested-by: Heiko Schocher <hs@denx.de>
Diffstat (limited to 'include/asm-arm')
-rw-r--r--include/asm-arm/arch-kirkwood/gpio.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/include/asm-arm/arch-kirkwood/gpio.h b/include/asm-arm/arch-kirkwood/gpio.h
new file mode 100644
index 0000000..5c86919
--- /dev/null
+++ b/include/asm-arm/arch-kirkwood/gpio.h
@@ -0,0 +1,51 @@
+/*
+ * arch/asm-arm/mach-kirkwood/include/mach/gpio.h
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+/*
+ * Based on (mostly copied from) plat-orion based Linux 2.6 kernel driver.
+ * Removed kernel level irq handling. Took some macros from kernel to
+ * allow build.
+ *
+ * Dieter Kiermaier dk-arm-linux@gmx.de
+ */
+
+#ifndef __KIRKWOOD_GPIO_H
+#define __KIRKWOOD_GPIO_H
+
+/* got from kernel include/linux/kernel.h */
+#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+/* got from kernel include/linux/bitops.h */
+#define BITS_PER_BYTE 8
+#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
+
+#define GPIO_MAX 50
+#define GPIO_OFF(pin) (((pin) >> 5) ? 0x0040 : 0x0000)
+#define GPIO_OUT(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x00)
+#define GPIO_IO_CONF(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x04)
+#define GPIO_BLINK_EN(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x08)
+#define GPIO_IN_POL(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x0c)
+#define GPIO_DATA_IN(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x10)
+#define GPIO_EDGE_CAUSE(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x14)
+#define GPIO_EDGE_MASK(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x18)
+#define GPIO_LEVEL_MASK(pin) (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x1c)
+
+/*
+ * Kirkwood-specific GPIO API
+ */
+int kw_gpio_is_valid(unsigned pin, int mode);
+int kw_gpio_direction_input(unsigned pin);
+int kw_gpio_direction_output(unsigned pin, int value);
+int kw_gpio_get_value(unsigned pin);
+void kw_gpio_set_value(unsigned pin, int value);
+void kw_gpio_set_blink(unsigned pin, int blink);
+void kw_gpio_set_unused(unsigned pin);
+
+#define GPIO_INPUT_OK (1 << 0)
+#define GPIO_OUTPUT_OK (1 << 1)
+
+#endif