1 files changed, 97 insertions, 0 deletions

diff --git a/arch/arm/mach-kirkwood/mpp.c b/arch/arm/mach-kirkwood/mpp.c
new file mode 100644
index 000000000000..63c44934391a
--- /dev/null
+++ b/arch/arm/mach-kirkwood/mpp.c
@@ -0,0 +1,97 @@
+/*
+ * arch/arm/mach-kirkwood/mpp.c
+ *
+ * MPP functions for Marvell Kirkwood SoCs
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mbus.h>
+#include <linux/io.h>
+#include <asm/gpio.h>
+#include <mach/hardware.h>
+#include "common.h"
+#include "mpp.h"
+
+static unsigned int __init kirkwood_variant(void)
+{
+        u32 dev, rev;
+
+        kirkwood_pcie_id(&dev, &rev);
+
+        if (dev == MV88F6281_DEV_ID && rev >= MV88F6281_REV_A0)
+                return MPP_F6281_MASK;
+        if (dev == MV88F6192_DEV_ID && rev >= MV88F6192_REV_A0)
+                return MPP_F6192_MASK;
+        if (dev == MV88F6180_DEV_ID)
+                return MPP_F6180_MASK;
+
+        printk(KERN_ERR "MPP setup: unknown kirkwood variant "
+                        "(dev %#x rev %#x)\n", dev, rev);
+        return 0;
+}
+
+#define MPP_CTRL(i)     (DEV_BUS_VIRT_BASE + (i) * 4)
+#define MPP_NR_REGS     (1 + MPP_MAX/8)
+
+void __init kirkwood_mpp_conf(unsigned int *mpp_list)
+{
+        u32 mpp_ctrl[MPP_NR_REGS];
+        unsigned int variant_mask;
+        int i;
+
+        variant_mask = kirkwood_variant();
+        if (!variant_mask)
+                return;
+
+        printk(KERN_DEBUG "initial MPP regs:");
+        for (i = 0; i < MPP_NR_REGS; i++) {
+                mpp_ctrl[i] = readl(MPP_CTRL(i));
+                printk(" %08x", mpp_ctrl[i]);
+        }
+        printk("\n");
+
+        while (*mpp_list) {
+                unsigned int num = MPP_NUM(*mpp_list);
+                unsigned int sel = MPP_SEL(*mpp_list);
+                int shift, gpio_mode;
+
+                if (num > MPP_MAX) {
+                        printk(KERN_ERR "kirkwood_mpp_conf: invalid MPP "
+                                        "number (%u)\n", num);
+                        continue;
+                }
+                if (!(*mpp_list & variant_mask)) {
+                        printk(KERN_WARNING
+                               "kirkwood_mpp_conf: requested MPP%u config "
+                               "unavailable on this hardware\n", num);
+                        continue;
+                }
+
+                shift = (num & 7) << 2;
+                mpp_ctrl[num / 8] &= ~(0xf << shift);
+                mpp_ctrl[num / 8] |= sel << shift;
+
+                gpio_mode = 0;
+                if (*mpp_list & MPP_INPUT_MASK)
+                        gpio_mode |= GPIO_INPUT_OK;
+                if (*mpp_list & MPP_OUTPUT_MASK)
+                        gpio_mode |= GPIO_OUTPUT_OK;
+                if (sel != 0)
+                        gpio_mode = 0;
+                orion_gpio_set_valid(num, gpio_mode);
+
+                mpp_list++;
+        }
+
+        printk(KERN_DEBUG "  final MPP regs:");
+        for (i = 0; i < MPP_NR_REGS; i++) {
+                writel(mpp_ctrl[i], MPP_CTRL(i));
+                printk(" %08x", mpp_ctrl[i]);
+        }
+        printk("\n");
+}