[PATCH] USB: OHCI for AU1200

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

@@ -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] = {

drivers/usb/host/ohci-au1xxx.c

@@ -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)
@@ -37,21 +39,68 @@
 #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*/