1 files changed, 118 insertions, 0 deletions

diff --git a/arch/arm/mach-ns9xxx/gpio-ns9360.c b/arch/arm/mach-ns9xxx/gpio-ns9360.c
new file mode 100644
index 000000000000..cabfb879dda9
--- /dev/null
+++ b/arch/arm/mach-ns9xxx/gpio-ns9360.c
@@ -0,0 +1,118 @@
+/*
+ * arch/arm/mach-ns9xxx/gpio-ns9360.c
+ *
+ * Copyright (C) 2006,2007 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/bug.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <asm/arch-ns9xxx/regs-bbu.h>
+#include <asm/arch-ns9xxx/processor-ns9360.h>
+
+#include "gpio-ns9360.h"
+
+static inline int ns9360_valid_gpio(unsigned gpio)
+{
+        return gpio <= 72;
+}
+
+static inline void __iomem *ns9360_gpio_get_gconfaddr(unsigned gpio)
+{
+        if (gpio < 56)
+                return BBU_GCONFb1(gpio / 8);
+        else
+                /*
+                 * this could be optimised away on
+                 * ns9750 only builds, but it isn't ...
+                 */
+                return BBU_GCONFb2((gpio - 56) / 8);
+}
+
+static inline void __iomem *ns9360_gpio_get_gctrladdr(unsigned gpio)
+{
+        if (gpio < 32)
+                return BBU_GCTRL1;
+        else if (gpio < 64)
+                return BBU_GCTRL2;
+        else
+                /* this could be optimised away on ns9750 only builds */
+                return BBU_GCTRL3;
+}
+
+static inline void __iomem *ns9360_gpio_get_gstataddr(unsigned gpio)
+{
+        if (gpio < 32)
+                return BBU_GSTAT1;
+        else if (gpio < 64)
+                return BBU_GSTAT2;
+        else
+                /* this could be optimised away on ns9750 only builds */
+                return BBU_GSTAT3;
+}
+
+/*
+ * each gpio can serve for 4 different purposes [0..3].  These are called
+ * "functions" and passed in the parameter func.  Functions 0-2 are always some
+ * special things, function 3 is GPIO.  If func == 3 dir specifies input or
+ * output, and with inv you can enable an inverter (independent of func).
+ */
+int __ns9360_gpio_configure(unsigned gpio, int dir, int inv, int func)
+{
+        void __iomem *conf = ns9360_gpio_get_gconfaddr(gpio);
+        u32 confval;
+
+        confval = __raw_readl(conf);
+        REGSETIM_IDX(confval, BBU_GCONFx, DIR, gpio & 7, dir);
+        REGSETIM_IDX(confval, BBU_GCONFx, INV, gpio & 7, inv);
+        REGSETIM_IDX(confval, BBU_GCONFx, FUNC, gpio & 7, func);
+        __raw_writel(confval, conf);
+
+        return 0;
+}
+
+int ns9360_gpio_configure(unsigned gpio, int inv, int func)
+{
+        if (likely(ns9360_valid_gpio(gpio))) {
+                if (func == 3) {
+                        printk(KERN_WARNING "use gpio_direction_input "
+                                        "or gpio_direction_output\n");
+                        return -EINVAL;
+                } else
+                        return __ns9360_gpio_configure(gpio, 0, inv, func);
+        } else
+                return -EINVAL;
+}
+EXPORT_SYMBOL(ns9360_gpio_configure);
+
+int ns9360_gpio_get_value(unsigned gpio)
+{
+        void __iomem *stat = ns9360_gpio_get_gstataddr(gpio);
+        int ret;
+
+        ret = 1 & (__raw_readl(stat) >> (gpio & 31));
+
+        return ret;
+}
+
+void ns9360_gpio_set_value(unsigned gpio, int value)
+{
+        void __iomem *ctrl = ns9360_gpio_get_gctrladdr(gpio);
+        u32 ctrlval;
+
+        ctrlval = __raw_readl(ctrl);
+
+        if (value)
+                ctrlval |= 1 << (gpio & 31);
+        else
+                ctrlval &= ~(1 << (gpio & 31));
+
+        __raw_writel(ctrlval, ctrl);
+}