USB: add ehci-ixp bus glue

EHCI Glue driver for Intel IXP4XX EHCI USB controller

Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/Kconfig

@@ -50,6 +50,7 @@ config USB_ARCH_HAS_EHCI
 	boolean
 	default y if PPC_83xx
 	default y if SOC_AU1200
+	default y if ARCH_IXP4XX
 	default PCI
 
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.

drivers/usb/host/Kconfig

@@ -69,12 +69,12 @@ config USB_EHCI_TT_NEWSCHED
 
 config USB_EHCI_BIG_ENDIAN_MMIO
 	bool
-	depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX)
+	depends on USB_EHCI_HCD && (PPC_CELLEB || PPC_PS3 || 440EPX || ARCH_IXP4XX)
 	default y
 
 config USB_EHCI_BIG_ENDIAN_DESC
 	bool
-	depends on USB_EHCI_HCD && 440EPX
+	depends on USB_EHCI_HCD && (440EPX || ARCH_IXP4XX)
 	default y
 
 config USB_EHCI_FSL

drivers/usb/host/ehci-hcd.c

@@ -1008,6 +1008,11 @@ MODULE_LICENSE ("GPL");
 #define	PLATFORM_DRIVER		ehci_orion_driver
 #endif
 
+#ifdef CONFIG_ARCH_IXP4XX
+#include "ehci-ixp4xx.c"
+#define	PLATFORM_DRIVER		ixp4xx_ehci_driver
+#endif
+
 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
     !defined(PS3_SYSTEM_BUS_DRIVER)
 #error "missing bus glue for ehci-hcd"

drivers/usb/host/ehci-ixp4xx.c

@@ -0,0 +1,152 @@
+/*
+ * IXP4XX EHCI Host Controller Driver
+ *
+ * Author: Vladimir Barinov <vbarinov@ru.mvista.com>
+ *
+ * Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
+ *
+ * 2007 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/platform_device.h>
+
+static int ixp4xx_ehci_init(struct usb_hcd *hcd)
+{
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+	int retval = 0;
+
+	ehci->big_endian_desc = 1;
+	ehci->big_endian_mmio = 1;
+
+	ehci->caps = hcd->regs + 0x100;
+	ehci->regs = hcd->regs + 0x100
+		+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+	ehci->is_tdi_rh_tt = 1;
+	ehci_reset(ehci);
+
+	retval = ehci_init(hcd);
+	if (retval)
+		return retval;
+
+	ehci_port_power(ehci, 0);
+
+	return retval;
+}
+
+static const struct hc_driver ixp4xx_ehci_hc_driver = {
+	.description		= hcd_name,
+	.product_desc		= "IXP4XX EHCI Host Controller",
+	.hcd_priv_size		= sizeof(struct ehci_hcd),
+	.irq			= ehci_irq,
+	.flags			= HCD_MEMORY | HCD_USB2,
+	.reset			= ixp4xx_ehci_init,
+	.start			= ehci_run,
+	.stop			= ehci_stop,
+	.shutdown		= ehci_shutdown,
+	.urb_enqueue		= ehci_urb_enqueue,
+	.urb_dequeue		= ehci_urb_dequeue,
+	.endpoint_disable	= ehci_endpoint_disable,
+	.get_frame_number	= ehci_get_frame,
+	.hub_status_data	= ehci_hub_status_data,
+	.hub_control		= ehci_hub_control,
+#if defined(CONFIG_PM)
+	.bus_suspend		= ehci_bus_suspend,
+	.bus_resume		= ehci_bus_resume,
+#endif
+};
+
+static int ixp4xx_ehci_probe(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd;
+	const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
+	struct resource *res;
+	int irq;
+	int retval;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!res) {
+		dev_err(&pdev->dev,
+			"Found HC with no IRQ. Check %s setup!\n",
+			pdev->dev.bus_id);
+		return -ENODEV;
+	}
+	irq = res->start;
+
+	hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
+	if (!hcd) {
+		retval = -ENOMEM;
+		goto fail_create_hcd;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev,
+			"Found HC with no register addr. Check %s setup!\n",
+			pdev->dev.bus_id);
+		retval = -ENODEV;
+		goto fail_request_resource;
+	}
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = res->end - res->start + 1;
+
+	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+				driver->description)) {
+		dev_dbg(&pdev->dev, "controller already in use\n");
+		retval = -EBUSY;
+		goto fail_request_resource;
+	}
+
+	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
+	if (hcd->regs == NULL) {
+		dev_dbg(&pdev->dev, "error mapping memory\n");
+		retval = -EFAULT;
+		goto fail_ioremap;
+	}
+
+	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (retval)
+		goto fail_add_hcd;
+
+	return retval;
+
+fail_add_hcd:
+	iounmap(hcd->regs);
+fail_ioremap:
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+fail_request_resource:
+	usb_put_hcd(hcd);
+fail_create_hcd:
+	dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
+	return retval;
+}
+
+static int ixp4xx_ehci_remove(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+	usb_remove_hcd(hcd);
+	iounmap(hcd->regs);
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	usb_put_hcd(hcd);
+
+	return 0;
+}
+
+MODULE_ALIAS("ixp4xx-ehci");
+
+static struct platform_driver ixp4xx_ehci_driver = {
+	.probe = ixp4xx_ehci_probe,
+	.remove = ixp4xx_ehci_remove,
+	.driver = {
+		.name = "ixp4xx-ehci",
+		.bus = &platform_bus_type
+	},
+};

drivers/usb/host/ehci.h

@@ -746,6 +746,11 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
 #define writel_be(val, addr)	out_be32((__force unsigned *)addr, val)
 #endif
 
+#if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
+#define readl_be(addr)		__raw_readl((__force unsigned *)addr)
+#define writel_be(val, addr)	__raw_writel(val, (__force unsigned *)addr)
+#endif
+
 static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
 		__u32 __iomem * regs)
 {