ehci-orion: mbus decode window support

Make it possible to pass mbus_dram_target_info to the ehci-orion
driver via the platform data, make the ehci-orion driver program
the window registers based on this data if it is passed in, and
make the Orion platform setup code use this method instead of
programming the EHCI mbus window registers by hand.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Reviewed-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 34 insertions, 2 deletions

diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index e129981f139..0f0eb89c8cf 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -11,15 +11,19 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/mbus.h>
 #include <asm/arch/orion.h>
+#include <asm/arch/platform.h>
 
 #define rdl(off)        __raw_readl(hcd->regs + (off))
 #define wrl(off, val)   __raw_writel((val), hcd->regs + (off))
 
-#define USB_CAUSE               0x310
-#define USB_MASK                0x314
 #define USB_CMD                 0x140
 #define USB_MODE                0x1a8
+#define USB_CAUSE               0x310
+#define USB_MASK                0x314
+#define USB_WINDOW_CTRL(i)      (0x320 + ((i) << 4))
+#define USB_WINDOW_BASE(i)      (0x324 + ((i) << 4))
 #define USB_IPG                 0x360
 #define USB_PHY_PWR_CTRL        0x400
 #define USB_PHY_TX_CTRL         0x420
@@ -162,8 +166,30 @@ static const struct hc_driver ehci_orion_hc_driver = {
         .bus_resume = ehci_bus_resume,
 };
 
+static void __init
+ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
+                                struct mbus_dram_target_info *dram)
+{
+        int i;
+
+        for (i = 0; i < 4; i++) {
+                wrl(USB_WINDOW_CTRL(i), 0);
+                wrl(USB_WINDOW_BASE(i), 0);
+        }
+
+        for (i = 0; i < dram->num_cs; i++) {
+                struct mbus_dram_window *cs = dram->cs + i;
+
+                wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
+                                        (cs->mbus_attr << 8) |
+                                        (dram->mbus_dram_target_id << 4) | 1);
+                wrl(USB_WINDOW_BASE(i), cs->base);
+        }
+}
+
 static int __init ehci_orion_drv_probe(struct platform_device *pdev)
 {
+        struct orion_ehci_data *pd = pdev->dev.platform_data;
         struct resource *res;
         struct usb_hcd *hcd;
         struct ehci_hcd *ehci;
@@ -227,6 +253,12 @@ static int __init ehci_orion_drv_probe(struct platform_device *pdev)
         ehci->sbrn = 0x20;
 
         /*
+         * (Re-)program MBUS remapping windows if we are asked to.
+         */
+        if (pd != NULL && pd->dram != NULL)
+                ehci_orion_conf_mbus_windows(hcd, pd->dram);
+
+        /*
          * setup Orion USB controller
          */
         orion_usb_setup(hcd);