[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>

2 files changed, 80 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);
+