[PATCH] USB: EHCI for AU1200
Jordan Crouse [Fri, 20 Jan 2006 22:06:09 +0000 (14:06 -0800)]
ALCHEMY:  Add EHCI support for AU1200

Updated by removing the OHCI support

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

arch/mips/au1000/common/cputable.c
arch/mips/au1000/common/platform.c
drivers/usb/Kconfig
drivers/usb/host/Kconfig
drivers/usb/host/ehci-au1xxx.c [new file with mode: 0644]
drivers/usb/host/ehci-hcd.c
include/asm-mips/mach-mips/cpu-feature-overrides.h

index 4dbde82..d8df5fd 100644 (file)
@@ -38,7 +38,7 @@ struct cpu_spec       cpu_specs[] = {
     { 0xffffffff, 0x02030204, "Au1100 BE", 0, 1 },
     { 0xffffffff, 0x03030200, "Au1550 AA", 0, 1 },
     { 0xffffffff, 0x04030200, "Au1200 AB", 0, 0 },
-    { 0xffffffff, 0x04030201, "Au1200 AC", 0, 1 },
+    { 0xffffffff, 0x04030201, "Au1200 AC", 1, 0 },
     { 0x00000000, 0x00000000, "Unknown Au1xxx", 1, 0 },
 };
 
index 48d3f54..1fb3dbd 100644 (file)
@@ -278,9 +278,7 @@ static struct platform_device *au1xxx_platform_devices[] __initdata = {
        &au1100_lcd_device,
 #endif
 #ifdef CONFIG_SOC_AU1200
-#if 0  /* fixme */
        &au1xxx_usb_ehci_device,
-#endif
        &au1xxx_usb_gdt_device,
        &au1xxx_usb_otg_device,
        &au1200_lcd_device,
index 7772e28..0e86597 100644 (file)
@@ -10,8 +10,8 @@ menu "USB support"
 config USB_ARCH_HAS_HCD
        boolean
        default y if USB_ARCH_HAS_OHCI
+       default y if USB_ARCH_HAS_EHCI
        default y if ARM                                # SL-811
-       default y if PPC_83xx
        default PCI
 
 # many non-PCI SOC chips embed OHCI
@@ -31,6 +31,13 @@ config USB_ARCH_HAS_OHCI
        # more:
        default PCI
 
+# some non-PCI hcds implement EHCI
+config USB_ARCH_HAS_EHCI
+       boolean
+       default y if PPC_83xx
+       default y if SOC_AU1200
+       default PCI
+
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.
 config USB
        tristate "Support for Host-side USB"
index a452936..e27b79a 100644 (file)
@@ -6,7 +6,7 @@ comment "USB Host Controller Drivers"
 
 config USB_EHCI_HCD
        tristate "EHCI HCD (USB 2.0) support"
-       depends on USB && (PCI || PPC_83xx)
+       depends on USB && USB_ARCH_HAS_EHCI
        ---help---
          The Enhanced Host Controller Interface (EHCI) is standard for USB 2.0
          "high speed" (480 Mbit/sec, 60 Mbyte/sec) host controller hardware.
diff --git a/drivers/usb/host/ehci-au1xxx.c b/drivers/usb/host/ehci-au1xxx.c
new file mode 100644 (file)
index 0000000..63eadee
--- /dev/null
@@ -0,0 +1,297 @@
+/*
+ * 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);
index 8730bab..79f2d8b 100644 (file)
@@ -889,14 +889,19 @@ MODULE_LICENSE ("GPL");
 
 #ifdef CONFIG_PCI
 #include "ehci-pci.c"
+#define        EHCI_BUS_GLUED
 #endif
 
 #ifdef CONFIG_PPC_83xx
 #include "ehci-fsl.c"
+#define        EHCI_BUS_GLUED
 #endif
 
-#if !(defined(CONFIG_PCI) || \
-      defined(CONFIG_PPC_83xx) \
-     )
+#ifdef CONFIG_SOC_AU1X00
+#include "ehci-au1xxx.c"
+#define        EHCI_BUS_GLUED
+#endif
+
+#ifndef        EHCI_BUS_GLUED
 #error "missing bus glue for ehci-hcd"
 #endif
index 9f92aed..e06af6c 100644 (file)
 /* #define cpu_has_prefetch    ? */
 #define cpu_has_mcheck         1
 /* #define cpu_has_ejtag       ? */
+#ifdef CONFIG_CPU_HAS_LLSC
 #define cpu_has_llsc           1
+#else
+#define cpu_has_llsc           0
+#endif
 /* #define cpu_has_vtag_icache ? */
 /* #define cpu_has_dc_aliases  ? */
 /* #define cpu_has_ic_fills_f_dc ? */