--- /dev/null
+/*
+ * EHCI HCD (Host Controller Driver) for USB.
+ *
+ * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
+ *
+ * Bus Glue for AMD Alchemy Au1xxx
+ *
+ * Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
+ *
+ * Modified for AMD Alchemy Au1200 EHC
+ * by K.Boge <karsten.boge@amd.com>
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach-au1x00/au1000.h>
+
+#ifndef CONFIG_SOC_AU1200
+#error "this Alchemy chip doesn't have EHCI"
+#else /* Au1200 */
+
+#define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG)
+#define USB_MCFG_PFEN (1<<31)
+#define USB_MCFG_RDCOMB (1<<30)
+#define USB_MCFG_SSDEN (1<<23)
+#define USB_MCFG_PHYPLLEN (1<<19)
+#define USB_MCFG_EHCCLKEN (1<<17)
+#define USB_MCFG_UCAM (1<<7)
+#define USB_MCFG_EBMEN (1<<3)
+#define USB_MCFG_EMEMEN (1<<2)
+
+#define USBH_ENABLE_CE (USB_MCFG_PHYPLLEN | USB_MCFG_EHCCLKEN)
+
+#ifdef CONFIG_DMA_COHERENT
+#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
+ | USB_MCFG_PFEN | USB_MCFG_RDCOMB \
+ | USB_MCFG_SSDEN | USB_MCFG_UCAM \
+ | USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
+#else
+#define USBH_ENABLE_INIT (USBH_ENABLE_CE \
+ | USB_MCFG_PFEN | USB_MCFG_RDCOMB \
+ | USB_MCFG_SSDEN \
+ | USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
+#endif
+#define USBH_DISABLE (USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
+
+#endif /* Au1200 */
+
+extern int usb_disabled(void);
+
+/*-------------------------------------------------------------------------*/
+
+static void au1xxx_start_ehc(struct platform_device *dev)
+{
+ pr_debug(__FILE__ ": starting Au1xxx EHCI USB Controller\n");
+
+ /* write HW defaults again in case Yamon cleared them */
+ if (au_readl(USB_HOST_CONFIG) == 0) {
+ au_writel(0x00d02000, USB_HOST_CONFIG);
+ au_readl(USB_HOST_CONFIG);
+ udelay(1000);
+ }
+ /* enable host controller */
+ au_writel(USBH_ENABLE_CE | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
+ au_readl(USB_HOST_CONFIG);
+ udelay(1000);
+ au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG),
+ USB_HOST_CONFIG);
+ au_readl(USB_HOST_CONFIG);
+ udelay(1000);
+
+ pr_debug(__FILE__ ": Clock to USB host has been enabled\n");
+}
+
+static void au1xxx_stop_ehc(struct platform_device *dev)
+{
+ pr_debug(__FILE__ ": stopping Au1xxx EHCI USB Controller\n");
+
+ /* Disable mem */
+ au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
+ udelay(1000);
+ /* Disable clock */
+ au_writel(~USB_MCFG_EHCCLKEN & au_readl(USB_HOST_CONFIG),
+ USB_HOST_CONFIG);
+ au_readl(USB_HOST_CONFIG);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+/**
+ * usb_ehci_au1xxx_probe - initialize Au1xxx-based HCDs
+ * Context: !in_interrupt()
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it
+ * through the hotplug entry's driver_data.
+ *
+ */
+int usb_ehci_au1xxx_probe(const struct hc_driver *driver,
+ struct usb_hcd **hcd_out, struct platform_device *dev)
+{
+ int retval;
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci;
+
+#if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT)
+
+ /* Au1200 AB USB does not support coherent memory */
+ if (!(read_c0_prid() & 0xff)) {
+ pr_info("%s: this is chip revision AB!\n", dev->dev.name);
+ pr_info("%s: update your board or re-configure the kernel\n",
+ dev->dev.name);
+ return -ENODEV;
+ }
+#endif
+
+ au1xxx_start_ehc(dev);
+
+ if (dev->resource[1].flags != IORESOURCE_IRQ) {
+ pr_debug("resource[1] is not IORESOURCE_IRQ");
+ retval = -ENOMEM;
+ }
+ hcd = usb_create_hcd(driver, &dev->dev, "Au1xxx");
+ if (!hcd)
+ return -ENOMEM;
+ hcd->rsrc_start = dev->resource[0].start;
+ hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+ pr_debug("request_mem_region failed");
+ retval = -EBUSY;
+ goto err1;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ pr_debug("ioremap failed");
+ retval = -ENOMEM;
+ goto err2;
+ }
+
+ ehci = hcd_to_ehci(hcd);
+ ehci->caps = hcd->regs;
+ ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
+ /* cache this readonly data; minimize chip reads */
+ ehci->hcs_params = readl(&ehci->caps->hcs_params);
+
+ /* ehci_hcd_init(hcd_to_ehci(hcd)); */
+
+ retval =
+ usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT | SA_SHIRQ);
+ if (retval == 0)
+ return retval;
+
+ au1xxx_stop_ehc(dev);
+ iounmap(hcd->regs);
+err2:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err1:
+ usb_put_hcd(hcd);
+ return retval;
+}
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_ehci_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_ehci_hcd_au1xxx_probe(), first invoking
+ * the HCD's stop() method. It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ */
+void usb_ehci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev)
+{
+ usb_remove_hcd(hcd);
+ iounmap(hcd->regs);
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ usb_put_hcd(hcd);
+ au1xxx_stop_ehc(dev);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct hc_driver ehci_au1xxx_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Au1xxx EHCI",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ehci_init,
+ .start = ehci_run,
+ .stop = ehci_stop,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ehci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+#ifdef CONFIG_PM
+ .hub_suspend = ehci_hub_suspend,
+ .hub_resume = ehci_hub_resume,
+#endif
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int ehci_hcd_au1xxx_drv_probe(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct usb_hcd *hcd = NULL;
+ int ret;
+
+ pr_debug("In ehci_hcd_au1xxx_drv_probe\n");
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ ret = usb_ehci_au1xxx_probe(&ehci_au1xxx_hc_driver, &hcd, pdev);
+ return ret;
+}
+
+static int ehci_hcd_au1xxx_drv_remove(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+ usb_ehci_au1xxx_remove(hcd, pdev);
+ return 0;
+}
+
+ /*TBD*/
+/*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+ return 0;
+}
+static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+ return 0;
+}
+*/
+static struct device_driver ehci_hcd_au1xxx_driver = {
+ .name = "au1xxx-ehci",
+ .bus = &platform_bus_type,
+ .probe = ehci_hcd_au1xxx_drv_probe,
+ .remove = ehci_hcd_au1xxx_drv_remove,
+ /*.suspend = ehci_hcd_au1xxx_drv_suspend, */
+ /*.resume = ehci_hcd_au1xxx_drv_resume, */
+};
+
+static int __init ehci_hcd_au1xxx_init(void)
+{
+ pr_debug(DRIVER_INFO " (Au1xxx)\n");
+
+ return driver_register(&ehci_hcd_au1xxx_driver);
+}
+
+static void __exit ehci_hcd_au1xxx_cleanup(void)
+{
+ driver_unregister(&ehci_hcd_au1xxx_driver);
+}
+
+module_init(ehci_hcd_au1xxx_init);
+module_exit(ehci_hcd_au1xxx_cleanup);
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff