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authorAurelien Jarno <aurelien@aurel32.net>2007-09-25 15:42:09 +0200
committerRalf Baechle <ralf@linux-mips.org>2007-10-12 00:46:07 +0200
commit34cc662f8aae0ce1db5c64d55a39a5081f9e3cd8 (patch)
tree69447356fb052c8aa3a74154f2dee082b64f275d
parent[MIPS] Add CFE support to BCM47XX (diff)
downloadlinux-34cc662f8aae0ce1db5c64d55a39a5081f9e3cd8.tar.xz
linux-34cc662f8aae0ce1db5c64d55a39a5081f9e3cd8.zip
[MIPS] Add gpio support to the BCM47XX platform
Add GPIO support to the BCM47XX platform. It will be used by a GPIO LED driver. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/bcm47xx/Makefile2
-rw-r--r--arch/mips/bcm47xx/gpio.c79
-rw-r--r--include/asm-mips/mach-bcm47xx/gpio.h59
3 files changed, 139 insertions, 1 deletions
diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile
index dc035f90d363..0afe09703e3f 100644
--- a/arch/mips/bcm47xx/Makefile
+++ b/arch/mips/bcm47xx/Makefile
@@ -3,4 +3,4 @@
# under Linux.
#
-obj-y := irq.o prom.o serial.o setup.o time.o
+obj-y := gpio.o irq.o prom.o serial.o setup.o time.o
diff --git a/arch/mips/bcm47xx/gpio.c b/arch/mips/bcm47xx/gpio.c
new file mode 100644
index 000000000000..f5a53acf995a
--- /dev/null
+++ b/arch/mips/bcm47xx/gpio.c
@@ -0,0 +1,79 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
+ */
+
+#include <linux/ssb/ssb.h>
+#include <linux/ssb/ssb_driver_chipcommon.h>
+#include <linux/ssb/ssb_driver_extif.h>
+#include <asm/mach-bcm47xx/bcm47xx.h>
+#include <asm/mach-bcm47xx/gpio.h>
+
+int bcm47xx_gpio_to_irq(unsigned gpio)
+{
+ if (ssb_bcm47xx.chipco.dev)
+ return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
+ else if (ssb_bcm47xx.extif.dev)
+ return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
+ else
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(bcm47xx_gpio_to_irq);
+
+int bcm47xx_gpio_get_value(unsigned gpio)
+{
+ if (ssb_bcm47xx.chipco.dev)
+ return ssb_chipco_gpio_in(&ssb_bcm47xx.chipco, 1 << gpio);
+ else if (ssb_bcm47xx.extif.dev)
+ return ssb_extif_gpio_in(&ssb_bcm47xx.extif, 1 << gpio);
+ else
+ return 0;
+}
+EXPORT_SYMBOL_GPL(bcm47xx_gpio_get_value);
+
+void bcm47xx_gpio_set_value(unsigned gpio, int value)
+{
+ if (ssb_bcm47xx.chipco.dev)
+ ssb_chipco_gpio_out(&ssb_bcm47xx.chipco,
+ 1 << gpio,
+ value ? 1 << gpio : 0);
+ else if (ssb_bcm47xx.extif.dev)
+ ssb_extif_gpio_out(&ssb_bcm47xx.extif,
+ 1 << gpio,
+ value ? 1 << gpio : 0);
+}
+EXPORT_SYMBOL_GPL(bcm47xx_gpio_set_value);
+
+int bcm47xx_gpio_direction_input(unsigned gpio)
+{
+ if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
+ ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
+ 1 << gpio, 0);
+ else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
+ ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
+ 1 << gpio, 0);
+ else
+ return -EINVAL;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_input);
+
+int bcm47xx_gpio_direction_output(unsigned gpio, int value)
+{
+ bcm47xx_gpio_set_value(gpio, value);
+
+ if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
+ ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
+ 1 << gpio, 1 << gpio);
+ else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
+ ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
+ 1 << gpio, 1 << gpio);
+ else
+ return -EINVAL;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_output);
+
diff --git a/include/asm-mips/mach-bcm47xx/gpio.h b/include/asm-mips/mach-bcm47xx/gpio.h
new file mode 100644
index 000000000000..cfc8f4d618ce
--- /dev/null
+++ b/include/asm-mips/mach-bcm47xx/gpio.h
@@ -0,0 +1,59 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
+ */
+
+#ifndef __BCM47XX_GPIO_H
+#define __BCM47XX_GPIO_H
+
+#define BCM47XX_EXTIF_GPIO_LINES 5
+#define BCM47XX_CHIPCO_GPIO_LINES 16
+
+extern int bcm47xx_gpio_to_irq(unsigned gpio);
+extern int bcm47xx_gpio_get_value(unsigned gpio);
+extern void bcm47xx_gpio_set_value(unsigned gpio, int value);
+extern int bcm47xx_gpio_direction_input(unsigned gpio);
+extern int bcm47xx_gpio_direction_output(unsigned gpio, int value);
+
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+ return 0;
+}
+
+static inline void gpio_free(unsigned gpio)
+{
+}
+
+static inline int gpio_to_irq(unsigned gpio)
+{
+ return bcm47xx_gpio_to_irq(gpio);
+}
+
+static inline int gpio_get_value(unsigned gpio)
+{
+ return bcm47xx_gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+ bcm47xx_gpio_set_value(gpio, value);
+}
+
+static inline int gpio_direction_input(unsigned gpio)
+{
+ return bcm47xx_gpio_direction_input(gpio);
+}
+
+static inline int gpio_direction_output(unsigned gpio, int value)
+{
+ return bcm47xx_gpio_direction_output(gpio, value);
+}
+
+
+/* cansleep wrappers */
+#include <asm-generic/gpio.h>
+
+#endif /* __BCM47XX_GPIO_H */