[PATCH] IXP4XX EHCI HCD Glue

This patch adds support for Intel IXP4XX EHCI USB controller.

Since it's MMR and descriptors are represented in big-endian format then 
this patch is to be applied after the following patches posted to this list:
- ehci cpufreq patch 
- EHCI big endian data structures support 
- Set   CONFIG_USB_EHCI_BIG_ENDIAN_MMIO/_DESC in usb/host/Kconfig
- Safe endianness for transfer buffers after reset in case of HUB with TT

Signed-off-by: Vladimir Barinov <[email protected]>

---------

--- usb-2.6.orig/drivers/usb/host/ehci.h        2007-05-03 14:17:41.000000000 +0400
+++ usb-2.6.new/drivers/usb/host/ehci.h 2007-05-03 14:26:38.000000000 +0400
@@ -734,6 +734,11 @@ ehci_port_speed(struct ehci_hcd *ehci, u
 #define writel_be(val, addr)   out_be32((__force unsigned *)addr, val)
 #endif
 
+#if defined(CONFIG_ARM)
+#define readl_be(addr)         __raw_readl((__force unsigned *)addr)
+#define writel_be(val, addr)   __raw_writel(val, (__force unsigned *)addr)
+#endif
+
 static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
                __u32 __iomem * regs)
 {
--- usb-2.6.orig/drivers/usb/host/ehci-hcd.c    2007-05-03 14:17:41.000000000 +0400
+++ usb-2.6.new/drivers/usb/host/ehci-hcd.c     2007-05-03 14:24:14.000000000 +0400
@@ -1019,6 +1019,11 @@ MODULE_LICENSE ("GPL");
 #define        PLATFORM_DRIVER         ehci_ppc_soc_driver
 #endif
 
+#ifdef CONFIG_ARCH_IXP4XX
+#include "ehci-ixp4xx.c"
+#define        PLATFORM_DRIVER         ixp4xx_ehci_driver
+#endif
+
 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
     !defined(PS3_SYSTEM_BUS_DRIVER)
 #error "missing bus glue for ehci-hcd"
--- usb-2.6.orig/drivers/usb/host/ehci-ixp4xx.c 1970-01-01 03:00:00.000000000 +0300
+++ usb-2.6.new/drivers/usb/host/ehci-ixp4xx.c  2007-05-03 18:19:21.000000000 +0400
@@ -0,0 +1,152 @@
+/*
+ * IXP4XX EHCI Host Controller Driver
+ *
+ * Author: Vladimir Barinov <[email protected]>
+ *
+ * Based on "ehci-fsl.c" by David Brownell <[email protected]>
+ *
+ * 2007 (c) MontaVista Software, Inc. 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/platform_device.h>
+
+static int ixp4xx_ehci_init(struct usb_hcd *hcd)
+{
+       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+       int retval = 0;
+
+       ehci->big_endian_desc = 1;
+       ehci->big_endian_mmio = 1;
+
+       ehci->caps = hcd->regs + 0x100;
+       ehci->regs = hcd->regs + 0x100 + 
+           HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+       ehci->is_tdi_rh_tt = 1;
+       ehci_reset(ehci);
+
+       retval = ehci_init(hcd);
+       if (retval)
+               return retval;
+
+       ehci_port_power(ehci, 0);
+
+       return retval;
+}
+
+static const struct hc_driver ixp4xx_ehci_hc_driver = {
+       .description            = hcd_name,
+       .product_desc           = "IXP4XX EHCI Host Controller",
+       .hcd_priv_size          = sizeof(struct ehci_hcd),
+       .irq                    = ehci_irq,
+       .flags                  = HCD_MEMORY | HCD_USB2,
+       .reset                  = ixp4xx_ehci_init,
+       .start                  = ehci_run,
+       .stop                   = ehci_stop,
+       .shutdown               = ehci_shutdown,
+       .urb_enqueue            = ehci_urb_enqueue,
+       .urb_dequeue            = ehci_urb_dequeue,
+       .endpoint_disable       = ehci_endpoint_disable,
+       .get_frame_number       = ehci_get_frame,
+       .hub_status_data        = ehci_hub_status_data,
+       .hub_control            = ehci_hub_control,
+#if defined(CONFIG_PM)
+       .bus_suspend            = ehci_bus_suspend,
+       .bus_resume             = ehci_bus_resume,
+#endif
+};
+
+static int ixp4xx_ehci_probe(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd;
+       const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
+       struct resource *res;
+       int irq;
+       int retval;
+
+       if (usb_disabled())
+               return -ENODEV;
+
+       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+       if (!res) {
+               dev_err(&pdev->dev,
+                       "Found HC with no IRQ. Check %s setup!\n",
+                       pdev->dev.bus_id);
+               return -ENODEV;
+       }
+       irq = res->start;
+
+       hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
+       if (!hcd) {
+               retval = -ENOMEM;
+               goto fail_create_hcd;
+       }
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               dev_err(&pdev->dev,
+                       "Found HC with no register addr. Check %s setup!\n",
+                       pdev->dev.bus_id);
+               retval = -ENODEV;
+               goto fail_request_resource;
+       }
+       hcd->rsrc_start = res->start;
+       hcd->rsrc_len = res->end - res->start + 1;
+
+       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+                               driver->description)) {
+               dev_dbg(&pdev->dev, "controller already in use\n");
+               retval = -EBUSY;
+               goto fail_request_resource;
+       }
+
+       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
+       if (hcd->regs == NULL) {
+               dev_dbg(&pdev->dev, "error mapping memory\n");
+               retval = -EFAULT;
+               goto fail_ioremap;
+       }
+
+       retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+       if (retval)
+               goto fail_add_hcd;
+
+       return retval;
+
+fail_add_hcd:
+       iounmap(hcd->regs);
+fail_ioremap:
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+fail_request_resource:
+       usb_put_hcd(hcd);
+fail_create_hcd:
+       dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
+       return retval;
+}
+
+static int ixp4xx_ehci_remove(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+       usb_remove_hcd(hcd);
+       iounmap(hcd->regs);
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+       usb_put_hcd(hcd);
+
+       return 0;
+}
+
+MODULE_ALIAS("ixp4xx-ehci");
+
+static struct platform_driver ixp4xx_ehci_driver = {
+       .probe = ixp4xx_ehci_probe,
+       .remove = ixp4xx_ehci_remove,
+       .driver = {
+               .name = "ixp4xx-ehci",
+               .bus = &platform_bus_type
+       },
+};
--- usb-2.6.orig/drivers/usb/Kconfig    2007-05-02 17:28:44.000000000 +0400
+++ usb-2.6.new/drivers/usb/Kconfig     2007-05-03 15:09:02.000000000 +0400
@@ -39,6 +39,7 @@ config USB_ARCH_HAS_EHCI
        boolean
        default y if PPC_83xx
        default y if SOC_AU1200
+       default y if ARCH_IXP4XX
        default PCI
 
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
--- usb-2.6.orig/drivers/usb/host/Kconfig       2007-05-02 17:31:10.000000000 +0400
+++ usb-2.6.new/drivers/usb/host/Kconfig        2007-05-03 15:50:10.000000000 +0400
@@ -69,12 +69,12 @@ config USB_EHCI_TT_NEWSCHED
 
 config USB_EHCI_BIG_ENDIAN_MMIO
        bool
-       depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX)
+       depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || ARCH_IXP4XX)
        default y
 
 config USB_EHCI_BIG_ENDIAN_DESC
        bool
-       depends on USB_EHCI_HCD && 440EPX
+       depends on USB_EHCI_HCD && (440EPX || ARCH_IXP4XX)
        default y
 
 config USB_ISP116X_HCD
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