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@@ -0,0 +1,297 @@
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+/*
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+ * EHCI HCD (Host Controller Driver) for USB.
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+ *
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+ * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
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+ *
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+ * Bus Glue for AMD Alchemy Au1xxx
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+ *
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+ * Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
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+ *
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+ * Modified for AMD Alchemy Au1200 EHC
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+ * by K.Boge <karsten.boge@amd.com>
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+ *
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+ * This file is licenced under the GPL.
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+ */
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+
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+#include <linux/platform_device.h>
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+#include <asm/mach-au1x00/au1000.h>
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+
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+#ifndef CONFIG_SOC_AU1200
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+#error "this Alchemy chip doesn't have EHCI"
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+#else /* Au1200 */
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+
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+#define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG)
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+#define USB_MCFG_PFEN (1<<31)
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+#define USB_MCFG_RDCOMB (1<<30)
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+#define USB_MCFG_SSDEN (1<<23)
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+#define USB_MCFG_PHYPLLEN (1<<19)
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+#define USB_MCFG_EHCCLKEN (1<<17)
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+#define USB_MCFG_UCAM (1<<7)
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+#define USB_MCFG_EBMEN (1<<3)
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+#define USB_MCFG_EMEMEN (1<<2)
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+
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+#define USBH_ENABLE_CE (USB_MCFG_PHYPLLEN | USB_MCFG_EHCCLKEN)
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+
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+#ifdef CONFIG_DMA_COHERENT
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+#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
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+ | USB_MCFG_PFEN | USB_MCFG_RDCOMB \
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+ | USB_MCFG_SSDEN | USB_MCFG_UCAM \
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+ | USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
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+#else
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+#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
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+ | USB_MCFG_PFEN | USB_MCFG_RDCOMB \
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+ | USB_MCFG_SSDEN \
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+ | USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
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+#endif
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+#define USBH_DISABLE (USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
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+
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+#endif /* Au1200 */
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+
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+extern int usb_disabled(void);
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+
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+/*-------------------------------------------------------------------------*/
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+
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+static void au1xxx_start_ehc(struct platform_device *dev)
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+{
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+ pr_debug(__FILE__ ": starting Au1xxx EHCI USB Controller\n");
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+
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+ /* write HW defaults again in case Yamon cleared them */
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+ if (au_readl(USB_HOST_CONFIG) == 0) {
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+ au_writel(0x00d02000, USB_HOST_CONFIG);
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+ au_readl(USB_HOST_CONFIG);
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+ udelay(1000);
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+ }
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+ /* enable host controller */
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+ au_writel(USBH_ENABLE_CE | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
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+ au_readl(USB_HOST_CONFIG);
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+ udelay(1000);
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+ au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG),
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+ USB_HOST_CONFIG);
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+ au_readl(USB_HOST_CONFIG);
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+ udelay(1000);
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+
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+ pr_debug(__FILE__ ": Clock to USB host has been enabled\n");
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+}
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+
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+static void au1xxx_stop_ehc(struct platform_device *dev)
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+{
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+ pr_debug(__FILE__ ": stopping Au1xxx EHCI USB Controller\n");
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+
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+ /* Disable mem */
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+ au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
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+ udelay(1000);
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+ /* Disable clock */
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+ au_writel(~USB_MCFG_EHCCLKEN & au_readl(USB_HOST_CONFIG),
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+ USB_HOST_CONFIG);
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+ au_readl(USB_HOST_CONFIG);
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+}
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+
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+/*-------------------------------------------------------------------------*/
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+
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+/* configure so an HC device and id are always provided */
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+/* always called with process context; sleeping is OK */
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+
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+/**
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+ * usb_ehci_au1xxx_probe - initialize Au1xxx-based HCDs
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+ * Context: !in_interrupt()
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+ *
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+ * Allocates basic resources for this USB host controller, and
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+ * then invokes the start() method for the HCD associated with it
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+ * through the hotplug entry's driver_data.
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+ *
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+ */
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+int usb_ehci_au1xxx_probe(const struct hc_driver *driver,
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+ struct usb_hcd **hcd_out, struct platform_device *dev)
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+{
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+ int retval;
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+ struct usb_hcd *hcd;
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+ struct ehci_hcd *ehci;
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+
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+#if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT)
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+
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+ /* Au1200 AB USB does not support coherent memory */
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+ if (!(read_c0_prid() & 0xff)) {
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+ pr_info("%s: this is chip revision AB!\n", dev->dev.name);
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+ pr_info("%s: update your board or re-configure the kernel\n",
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+ dev->dev.name);
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+ return -ENODEV;
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+ }
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+#endif
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+
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+ au1xxx_start_ehc(dev);
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+
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+ if (dev->resource[1].flags != IORESOURCE_IRQ) {
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+ pr_debug("resource[1] is not IORESOURCE_IRQ");
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+ retval = -ENOMEM;
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+ }
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+ hcd = usb_create_hcd(driver, &dev->dev, "Au1xxx");
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+ if (!hcd)
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+ return -ENOMEM;
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+ hcd->rsrc_start = dev->resource[0].start;
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+ hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
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+
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+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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+ pr_debug("request_mem_region failed");
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+ retval = -EBUSY;
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+ goto err1;
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+ }
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+
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+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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+ if (!hcd->regs) {
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+ pr_debug("ioremap failed");
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+ retval = -ENOMEM;
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+ goto err2;
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+ }
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+
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+ ehci = hcd_to_ehci(hcd);
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+ ehci->caps = hcd->regs;
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+ ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
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+ /* cache this readonly data; minimize chip reads */
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+ ehci->hcs_params = readl(&ehci->caps->hcs_params);
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+
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+ /* ehci_hcd_init(hcd_to_ehci(hcd)); */
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+
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+ retval =
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+ usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT | SA_SHIRQ);
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+ if (retval == 0)
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+ return retval;
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+
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+ au1xxx_stop_ehc(dev);
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+ iounmap(hcd->regs);
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+err2:
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+err1:
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+ usb_put_hcd(hcd);
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+ return retval;
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+}
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+
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+/* may be called without controller electrically present */
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+/* may be called with controller, bus, and devices active */
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+
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+/**
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+ * usb_ehci_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs
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+ * @dev: USB Host Controller being removed
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+ * Context: !in_interrupt()
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+ *
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+ * Reverses the effect of usb_ehci_hcd_au1xxx_probe(), first invoking
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+ * the HCD's stop() method. It is always called from a thread
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+ * context, normally "rmmod", "apmd", or something similar.
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+ *
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+ */
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+void usb_ehci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev)
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+{
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+ usb_remove_hcd(hcd);
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+ iounmap(hcd->regs);
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+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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+ usb_put_hcd(hcd);
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+ au1xxx_stop_ehc(dev);
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+}
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+
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+/*-------------------------------------------------------------------------*/
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+
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+static const struct hc_driver ehci_au1xxx_hc_driver = {
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+ .description = hcd_name,
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+ .product_desc = "Au1xxx EHCI",
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+ .hcd_priv_size = sizeof(struct ehci_hcd),
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+
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+ /*
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+ * generic hardware linkage
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+ */
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+ .irq = ehci_irq,
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+ .flags = HCD_MEMORY | HCD_USB2,
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+
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+ /*
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+ * basic lifecycle operations
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+ */
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+ .reset = ehci_init,
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+ .start = ehci_run,
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+ .stop = ehci_stop,
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+
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+ /*
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+ * managing i/o requests and associated device resources
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+ */
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+ .urb_enqueue = ehci_urb_enqueue,
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+ .urb_dequeue = ehci_urb_dequeue,
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+ .endpoint_disable = ehci_endpoint_disable,
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+
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+ /*
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+ * scheduling support
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+ */
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+ .get_frame_number = ehci_get_frame,
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+
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+ /*
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+ * root hub support
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+ */
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+ .hub_status_data = ehci_hub_status_data,
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+ .hub_control = ehci_hub_control,
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+#ifdef CONFIG_PM
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+ .hub_suspend = ehci_hub_suspend,
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+ .hub_resume = ehci_hub_resume,
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+#endif
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+};
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+
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+/*-------------------------------------------------------------------------*/
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+
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+static int ehci_hcd_au1xxx_drv_probe(struct device *dev)
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+{
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+ struct platform_device *pdev = to_platform_device(dev);
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+ struct usb_hcd *hcd = NULL;
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+ int ret;
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+
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+ pr_debug("In ehci_hcd_au1xxx_drv_probe\n");
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+
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+ if (usb_disabled())
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+ return -ENODEV;
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+
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+ ret = usb_ehci_au1xxx_probe(&ehci_au1xxx_hc_driver, &hcd, pdev);
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+ return ret;
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+}
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+
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+static int ehci_hcd_au1xxx_drv_remove(struct device *dev)
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+{
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+ struct platform_device *pdev = to_platform_device(dev);
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+ struct usb_hcd *hcd = dev_get_drvdata(dev);
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+
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+ usb_ehci_au1xxx_remove(hcd, pdev);
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+ return 0;
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+}
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+
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+ /*TBD*/
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+/*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
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+{
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+ struct platform_device *pdev = to_platform_device(dev);
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+ struct usb_hcd *hcd = dev_get_drvdata(dev);
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+
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+ return 0;
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+}
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+static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
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+{
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+ struct platform_device *pdev = to_platform_device(dev);
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+ struct usb_hcd *hcd = dev_get_drvdata(dev);
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+
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+ return 0;
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+}
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+*/
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+static struct device_driver ehci_hcd_au1xxx_driver = {
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+ .name = "au1xxx-ehci",
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+ .bus = &platform_bus_type,
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+ .probe = ehci_hcd_au1xxx_drv_probe,
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+ .remove = ehci_hcd_au1xxx_drv_remove,
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+ /*.suspend = ehci_hcd_au1xxx_drv_suspend, */
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+ /*.resume = ehci_hcd_au1xxx_drv_resume, */
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+};
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+
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+static int __init ehci_hcd_au1xxx_init(void)
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+{
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+ pr_debug(DRIVER_INFO " (Au1xxx)\n");
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+
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+ return driver_register(&ehci_hcd_au1xxx_driver);
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+}
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+
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+static void __exit ehci_hcd_au1xxx_cleanup(void)
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+{
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+ driver_unregister(&ehci_hcd_au1xxx_driver);
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+}
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+
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+module_init(ehci_hcd_au1xxx_init);
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+module_exit(ehci_hcd_au1xxx_cleanup);
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Jordan Crouse