1 files changed, 240 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c
new file mode 100644
index 000000000000..4fd4bea9ac7a
--- /dev/null
+++ b/drivers/usb/host/ohci-spear.c
@@ -0,0 +1,240 @@
+/*
+* OHCI HCD (Host Controller Driver) for USB.
+*
+* Copyright (C) 2010 ST Microelectronics.
+* Deepak Sikri<deepak.sikri@st.com>
+*
+* Based on various ohci-*.c drivers
+*
+* 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/signal.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+struct spear_ohci {
+        struct ohci_hcd ohci;
+        struct clk *clk;
+};
+
+#define to_spear_ohci(hcd)      (struct spear_ohci *)hcd_to_ohci(hcd)
+
+static void spear_start_ohci(struct spear_ohci *ohci)
+{
+        clk_enable(ohci->clk);
+}
+
+static void spear_stop_ohci(struct spear_ohci *ohci)
+{
+        clk_disable(ohci->clk);
+}
+
+static int __devinit ohci_spear_start(struct usb_hcd *hcd)
+{
+        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+        int ret;
+
+        ret = ohci_init(ohci);
+        if (ret < 0)
+                return ret;
+        ohci->regs = hcd->regs;
+
+        ret = ohci_run(ohci);
+        if (ret < 0) {
+                dev_err(hcd->self.controller, "can't start\n");
+                ohci_stop(hcd);
+                return ret;
+        }
+
+        create_debug_files(ohci);
+
+#ifdef DEBUG
+        ohci_dump(ohci, 1);
+#endif
+        return 0;
+}
+
+static const struct hc_driver ohci_spear_hc_driver = {
+        .description            = hcd_name,
+        .product_desc           = "SPEAr OHCI",
+        .hcd_priv_size          = sizeof(struct spear_ohci),
+
+        /* generic hardware linkage */
+        .irq                    = ohci_irq,
+        .flags                  = HCD_USB11 | HCD_MEMORY,
+
+        /* basic lifecycle operations */
+        .start                  = ohci_spear_start,
+        .stop                   = ohci_stop,
+        .shutdown               = ohci_shutdown,
+#ifdef  CONFIG_PM
+        .bus_suspend            = ohci_bus_suspend,
+        .bus_resume             = ohci_bus_resume,
+#endif
+
+        /* managing i/o requests and associated device resources */
+        .urb_enqueue            = ohci_urb_enqueue,
+        .urb_dequeue            = ohci_urb_dequeue,
+        .endpoint_disable       = ohci_endpoint_disable,
+
+        /* scheduling support */
+        .get_frame_number       = ohci_get_frame,
+
+        /* root hub support */
+        .hub_status_data        = ohci_hub_status_data,
+        .hub_control            = ohci_hub_control,
+
+        .start_port_reset       = ohci_start_port_reset,
+};
+
+static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
+{
+        const struct hc_driver *driver = &ohci_spear_hc_driver;
+        struct usb_hcd *hcd = NULL;
+        struct clk *usbh_clk;
+        struct spear_ohci *ohci_p;
+        struct resource *res;
+        int retval, irq;
+        int *pdata = pdev->dev.platform_data;
+        char clk_name[20] = "usbh_clk";
+
+        if (pdata == NULL)
+                return -EFAULT;
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                retval = irq;
+                goto fail_irq_get;
+        }
+
+        if (*pdata >= 0)
+                sprintf(clk_name, "usbh.%01d_clk", *pdata);
+
+        usbh_clk = clk_get(NULL, clk_name);
+        if (IS_ERR(usbh_clk)) {
+                dev_err(&pdev->dev, "Error getting interface clock\n");
+                retval = PTR_ERR(usbh_clk);
+                goto fail_get_usbh_clk;
+        }
+
+        hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+        if (!hcd) {
+                retval = -ENOMEM;
+                goto fail_create_hcd;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                retval = -ENODEV;
+                goto fail_request_resource;
+        }
+
+        hcd->rsrc_start = pdev->resource[0].start;
+        hcd->rsrc_len = resource_size(res);
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+                dev_dbg(&pdev->dev, "request_mem_region failed\n");
+                retval = -EBUSY;
+                goto fail_request_resource;
+        }
+
+        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+        if (!hcd->regs) {
+                dev_dbg(&pdev->dev, "ioremap failed\n");
+                retval = -ENOMEM;
+                goto fail_ioremap;
+        }
+
+        ohci_p = (struct spear_ohci *)hcd_to_ohci(hcd);
+        ohci_p->clk = usbh_clk;
+        spear_start_ohci(ohci_p);
+        ohci_hcd_init(hcd_to_ohci(hcd));
+
+        retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), IRQF_DISABLED);
+        if (retval == 0)
+                return retval;
+
+        spear_stop_ohci(ohci_p);
+        iounmap(hcd->regs);
+fail_ioremap:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+fail_request_resource:
+        usb_put_hcd(hcd);
+fail_create_hcd:
+        clk_put(usbh_clk);
+fail_get_usbh_clk:
+fail_irq_get:
+        dev_err(&pdev->dev, "init fail, %d\n", retval);
+
+        return retval;
+}
+
+static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+        struct spear_ohci *ohci_p = to_spear_ohci(hcd);
+
+        usb_remove_hcd(hcd);
+        if (ohci_p->clk)
+                spear_stop_ohci(ohci_p);
+
+        iounmap(hcd->regs);
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+
+        if (ohci_p->clk)
+                clk_put(ohci_p->clk);
+        platform_set_drvdata(pdev, NULL);
+        return 0;
+}
+
+#if defined(CONFIG_PM)
+static int spear_ohci_hcd_drv_suspend(struct platform_device *dev,
+                pm_message_t message)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(dev);
+        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+        struct spear_ohci *ohci_p = to_spear_ohci(hcd);
+
+        if (time_before(jiffies, ohci->next_statechange))
+                msleep(5);
+        ohci->next_statechange = jiffies;
+
+        spear_stop_ohci(ohci_p);
+        ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
+        return 0;
+}
+
+static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(dev);
+        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+        struct spear_ohci *ohci_p = to_spear_ohci(hcd);
+
+        if (time_before(jiffies, ohci->next_statechange))
+                msleep(5);
+        ohci->next_statechange = jiffies;
+
+        spear_start_ohci(ohci_p);
+        ohci_finish_controller_resume(hcd);
+        return 0;
+}
+#endif
+
+/* Driver definition to register with the platform bus */
+static struct platform_driver spear_ohci_hcd_driver = {
+        .probe =        spear_ohci_hcd_drv_probe,
+        .remove =       spear_ohci_hcd_drv_remove,
+#ifdef CONFIG_PM
+        .suspend =      spear_ohci_hcd_drv_suspend,
+        .resume =       spear_ohci_hcd_drv_resume,
+#endif
+        .driver = {
+                .owner = THIS_MODULE,
+                .name = "spear-ohci",
+        },
+};
+
+MODULE_ALIAS("platform:spear-ohci");