usb: OHCI/EHCI support for Netlogic XLS processor.

Add supprt for on-chip USB controller for Netlogic XLS MIPS64
SoC processor family.
Changes are:
 - update ehci-hcd.c and ohci-hcd.c to add XLS hcds
 - add ehci-xls.c: EHCI support for Netlogic XLS.
 - add ohci-xls.c: OHCI support for Netlogic XLS.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 161 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-xls.c b/drivers/usb/host/ehci-xls.c
new file mode 100644
index 000000000000..fe74bd676018
--- /dev/null
+++ b/drivers/usb/host/ehci-xls.c
@@ -0,0 +1,161 @@
+/*
+ * EHCI HCD for Netlogic XLS processors.
+ *
+ * (C) Copyright 2011 Netlogic Microsystems Inc.
+ *
+ *  Based on various ehci-*.c drivers
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/platform_device.h>
+
+static int ehci_xls_setup(struct usb_hcd *hcd)
+{
+        int     retval;
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+        ehci->caps = hcd->regs;
+        ehci->regs = hcd->regs +
+                HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+        dbg_hcs_params(ehci, "reset");
+        dbg_hcc_params(ehci, "reset");
+
+        /* cache this readonly data; minimize chip reads */
+        ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+        retval = ehci_halt(ehci);
+        if (retval)
+                return retval;
+
+        /* data structure init */
+        retval = ehci_init(hcd);
+        if (retval)
+                return retval;
+
+        ehci_reset(ehci);
+
+        return retval;
+}
+
+int ehci_xls_probe_internal(const struct hc_driver *driver,
+        struct platform_device *pdev)
+{
+        struct usb_hcd  *hcd;
+        struct resource *res;
+        int retval, irq;
+
+        /* Get our IRQ from an earlier registered Platform Resource */
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n",
+                                dev_name(&pdev->dev));
+                return -ENODEV;
+        }
+
+        /* Get our Memory Handle */
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev, "Error: MMIO Handle %s setup!\n",
+                                dev_name(&pdev->dev));
+                return -ENODEV;
+        }
+        hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+        if (!hcd) {
+                retval = -ENOMEM;
+                goto err1;
+        }
+
+        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 err2;
+        }
+        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 err3;
+        }
+
+        retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+        if (retval != 0)
+                goto err4;
+        return retval;
+
+err4:
+        iounmap(hcd->regs);
+err3:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err2:
+        usb_put_hcd(hcd);
+err1:
+        dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev),
+                        retval);
+        return retval;
+}
+
+static struct hc_driver ehci_xls_hc_driver = {
+        .description    = hcd_name,
+        .product_desc   = "XLS EHCI Host Controller",
+        .hcd_priv_size  = sizeof(struct ehci_hcd),
+        .irq            = ehci_irq,
+        .flags          = HCD_USB2 | HCD_MEMORY,
+        .reset          = ehci_xls_setup,
+        .start          = ehci_run,
+        .stop           = ehci_stop,
+        .shutdown       = ehci_shutdown,
+
+        .urb_enqueue    = ehci_urb_enqueue,
+        .urb_dequeue    = ehci_urb_dequeue,
+        .endpoint_disable = ehci_endpoint_disable,
+        .endpoint_reset = ehci_endpoint_reset,
+
+        .get_frame_number = ehci_get_frame,
+
+        .hub_status_data = ehci_hub_status_data,
+        .hub_control    = ehci_hub_control,
+        .bus_suspend    = ehci_bus_suspend,
+        .bus_resume     = ehci_bus_resume,
+        .relinquish_port = ehci_relinquish_port,
+        .port_handed_over = ehci_port_handed_over,
+
+        .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int ehci_xls_probe(struct platform_device *pdev)
+{
+        if (usb_disabled())
+                return -ENODEV;
+
+        return ehci_xls_probe_internal(&ehci_xls_hc_driver, pdev);
+}
+
+static int ehci_xls_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("ehci-xls");
+
+static struct platform_driver ehci_xls_driver = {
+        .probe          = ehci_xls_probe,
+        .remove         = ehci_xls_remove,
+        .shutdown       = usb_hcd_platform_shutdown,
+        .driver         = {
+                .name = "ehci-xls",
+        },
+};