[PATCH] USB: OHCI for AU1200
Jordan Crouse [Fri, 20 Jan 2006 22:09:54 +0000 (14:09 -0800)]
ALCHEMY:  Add OHCI support for AU1200

Updated by moving the OHCI support out of the EHCI patch.

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/platform.c
drivers/usb/host/ohci-au1xxx.c

index 1fb3dbd..dbb4ee7 100644 (file)
@@ -20,7 +20,7 @@
 static struct resource au1xxx_usb_ohci_resources[] = {
        [0] = {
                .start          = USB_OHCI_BASE,
-               .end            = USB_OHCI_BASE + USB_OHCI_LEN,
+               .end            = USB_OHCI_BASE + USB_OHCI_LEN - 1,
                .flags          = IORESOURCE_MEM,
        },
        [1] = {
index db280ca..a1c8b3b 100644 (file)
@@ -23,6 +23,8 @@
 
 #include <asm/mach-au1x00/au1000.h>
 
+#ifndef        CONFIG_SOC_AU1200
+
 #define USBH_ENABLE_BE (1<<0)
 #define USBH_ENABLE_C  (1<<1)
 #define USBH_ENABLE_E  (1<<2)
 #error not byte order defined
 #endif
 
+#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_OHCCLKEN (1<<16)
+#define USB_MCFG_UCAM     (1<<7)
+#define USB_MCFG_OBMEN    (1<<1)
+#define USB_MCFG_OMEMEN   (1<<0)
+
+#define USBH_ENABLE_CE    USB_MCFG_OHCCLKEN
+#ifdef CONFIG_DMA_COHERENT
+#define USBH_ENABLE_INIT  (USB_MCFG_OHCCLKEN \
+                         | USB_MCFG_PFEN | USB_MCFG_RDCOMB \
+                         | USB_MCFG_SSDEN | USB_MCFG_UCAM \
+                         | USB_MCFG_OBMEN | USB_MCFG_OMEMEN)
+#else
+#define USBH_ENABLE_INIT  (USB_MCFG_OHCCLKEN \
+                         | USB_MCFG_PFEN | USB_MCFG_RDCOMB \
+                         | USB_MCFG_SSDEN \
+                         | USB_MCFG_OBMEN | USB_MCFG_OMEMEN)
+#endif
+#define USBH_DISABLE      (USB_MCFG_OBMEN | USB_MCFG_OMEMEN)
+
+#endif  /* Au1200 */
+
 extern int usb_disabled(void);
 
 /*-------------------------------------------------------------------------*/
 
-static void au1xxx_start_hc(struct platform_device *dev)
+static void au1xxx_start_ohc(struct platform_device *dev)
 {
        printk(KERN_DEBUG __FILE__
                ": starting Au1xxx OHCI USB Controller\n");
 
        /* enable host controller */
+
+#ifndef CONFIG_SOC_AU1200
+
        au_writel(USBH_ENABLE_CE, USB_HOST_CONFIG);
        udelay(1000);
        au_writel(USBH_ENABLE_INIT, USB_HOST_CONFIG);
        udelay(1000);
 
+#else   /* Au1200 */
+
+       /* 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);
+       }
+       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);
+
+#endif  /* Au1200 */
+
        /* wait for reset complete (read register twice; see au1500 errata) */
        while (au_readl(USB_HOST_CONFIG),
                !(au_readl(USB_HOST_CONFIG) & USBH_ENABLE_RD))
@@ -61,13 +110,25 @@ static void au1xxx_start_hc(struct platform_device *dev)
        ": Clock to USB host has been enabled \n");
 }
 
-static void au1xxx_stop_hc(struct platform_device *dev)
+static void au1xxx_stop_ohc(struct platform_device *dev)
 {
        printk(KERN_DEBUG __FILE__
               ": stopping Au1xxx OHCI USB Controller\n");
 
+#ifndef CONFIG_SOC_AU1200
+
        /* Disable clock */
        au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG);
+
+#else   /* Au1200 */
+
+       /* Disable mem */
+       au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
+       udelay(1000);
+       /* Disable clock */
+       au_writel(~USBH_ENABLE_CE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG);
+       au_readl(USB_HOST_CONFIG);
+#endif  /* Au1200 */
 }
 
 
@@ -78,7 +139,7 @@ static void au1xxx_stop_hc(struct platform_device *dev)
 
 
 /**
- * usb_hcd_au1xxx_probe - initialize Au1xxx-based HCDs
+ * usb_ohci_au1xxx_probe - initialize Au1xxx-based HCDs
  * Context: !in_interrupt()
  *
  * Allocates basic resources for this USB host controller, and
@@ -86,14 +147,25 @@ static void au1xxx_stop_hc(struct platform_device *dev)
  * through the hotplug entry's driver_data.
  *
  */
-int usb_hcd_au1xxx_probe (const struct hc_driver *driver,
+static int usb_ohci_au1xxx_probe(const struct hc_driver *driver,
                          struct platform_device *dev)
 {
        int retval;
        struct usb_hcd *hcd;
 
-       if(dev->resource[1].flags != IORESOURCE_IRQ) {
-               pr_debug ("resource[1] is not IORESOURCE_IRQ");
+#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
+
+       if (dev->resource[1].flags != IORESOURCE_IRQ) {
+               pr_debug("resource[1] is not IORESOURCE_IRQ\n");
                return -ENOMEM;
        }
 
@@ -104,26 +176,26 @@ int usb_hcd_au1xxx_probe (const struct hc_driver *driver,
        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");
+               pr_debug("request_mem_region failed\n");
                retval = -EBUSY;
                goto err1;
        }
 
        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
        if (!hcd->regs) {
-               pr_debug("ioremap failed");
+               pr_debug("ioremap failed\n");
                retval = -ENOMEM;
                goto err2;
        }
 
-       au1xxx_start_hc(dev);
+       au1xxx_start_ohc(dev);
        ohci_hcd_init(hcd_to_ohci(hcd));
 
-       retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
+       retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT | SA_SHIRQ);
        if (retval == 0)
                return retval;
 
-       au1xxx_stop_hc(dev);
+       au1xxx_stop_ohc(dev);
        iounmap(hcd->regs);
  err2:
        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
@@ -146,10 +218,10 @@ int usb_hcd_au1xxx_probe (const struct hc_driver *driver,
  * context, normally "rmmod", "apmd", or something similar.
  *
  */
-void usb_hcd_au1xxx_remove (struct usb_hcd *hcd, struct platform_device *dev)
+static void usb_ohci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev)
 {
        usb_remove_hcd(hcd);
-       au1xxx_stop_hc(dev);
+       au1xxx_stop_ohc(dev);
        iounmap(hcd->regs);
        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
        usb_put_hcd(hcd);
@@ -235,7 +307,7 @@ static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
        if (usb_disabled())
                return -ENODEV;
 
-       ret = usb_hcd_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev);
+       ret = usb_ohci_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev);
        return ret;
 }
 
@@ -243,7 +315,7 @@ static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
 {
        struct usb_hcd *hcd = platform_get_drvdata(pdev);
 
-       usb_hcd_au1xxx_remove(hcd, pdev);
+       usb_ohci_au1xxx_remove(hcd, pdev);
        return 0;
 }
        /*TBD*/