[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>
diff --git a/arch/mips/bcm47xx/gpio.c b/arch/mips/bcm47xx/gpio.c
new file mode 100644
index 0000000..f5a53ac
--- /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);
+