Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / usb / host / ehci-cns3xxx.c

diff --git a/drivers/usb/host/ehci-cns3xxx.c b/drivers/usb/host/ehci-cns3xxx.c
new file mode 100644 (file)
index 0000000..708a05b
--- /dev/null
+++ b/drivers/usb/host/ehci-cns3xxx.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2008 Cavium Networks
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/atomic.h>
+#include <mach/cns3xxx.h>
+#include <mach/pm.h>
+
+static int cns3xxx_ehci_init(struct usb_hcd *hcd)
+{
+       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+       int retval;
+
+       /*
+        * EHCI and OHCI share the same clock and power,
+        * resetting twice would cause the 1st controller been reset.
+        * Therefore only do power up  at the first up device, and
+        * power down at the last down device.
+        *
+        * Set USB AHB INCR length to 16
+        */
+       if (atomic_inc_return(&usb_pwr_ref) == 1) {
+               cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB);
+               cns3xxx_pwr_clk_en(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
+               cns3xxx_pwr_soft_rst(1 << PM_SOFT_RST_REG_OFFST_USB_HOST);
+               __raw_writel((__raw_readl(MISC_CHIP_CONFIG_REG) | (0X2 << 24)),
+                       MISC_CHIP_CONFIG_REG);
+       }
+
+       ehci->caps = hcd->regs;
+       ehci->regs = hcd->regs
+               + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+       hcd->has_tt = 0;
+       ehci_reset(ehci);
+
+       retval = ehci_init(hcd);
+       if (retval)
+               return retval;
+
+       ehci_port_power(ehci, 0);
+
+       return retval;
+}
+
+static const struct hc_driver cns3xxx_ehci_hc_driver = {
+       .description            = hcd_name,
+       .product_desc           = "CNS3XXX EHCI Host Controller",
+       .hcd_priv_size          = sizeof(struct ehci_hcd),
+       .irq                    = ehci_irq,
+       .flags                  = HCD_MEMORY | HCD_USB2,
+       .reset                  = cns3xxx_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,
+       .endpoint_reset         = ehci_endpoint_reset,
+       .get_frame_number       = ehci_get_frame,
+       .hub_status_data        = ehci_hub_status_data,
+       .hub_control            = ehci_hub_control,
+#ifdef CONFIG_PM
+       .bus_suspend            = ehci_bus_suspend,
+       .bus_resume             = ehci_bus_resume,
+#endif
+       .relinquish_port        = ehci_relinquish_port,
+       .port_handed_over       = ehci_port_handed_over,
+
+       .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
+};
+
+static int cns3xxx_ehci_probe(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       struct usb_hcd *hcd;
+       const struct hc_driver *driver = &cns3xxx_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(dev, "Found HC with no IRQ.\n");
+               return -ENODEV;
+       }
+       irq = res->start;
+
+       hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+       if (!hcd)
+               return -ENOMEM;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               dev_err(dev, "Found HC with no register addr.\n");
+               retval = -ENODEV;
+               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(dev, "controller already in use\n");
+               retval = -EBUSY;
+               goto err1;
+       }
+
+       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+       if (hcd->regs == NULL) {
+               dev_dbg(dev, "error mapping memory\n");
+               retval = -EFAULT;
+               goto err2;
+       }
+
+       retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+       if (retval == 0)
+               return retval;
+
+       iounmap(hcd->regs);
+err2:
+       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err1:
+       usb_put_hcd(hcd);
+
+       return retval;
+}
+
+static int cns3xxx_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);
+
+       /*
+        * EHCI and OHCI share the same clock and power,
+        * resetting twice would cause the 1st controller been reset.
+        * Therefore only do power up  at the first up device, and
+        * power down at the last down device.
+        */
+       if (atomic_dec_return(&usb_pwr_ref) == 0)
+               cns3xxx_pwr_clk_dis(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
+
+       usb_put_hcd(hcd);
+
+       platform_set_drvdata(pdev, NULL);
+
+       return 0;
+}
+
+MODULE_ALIAS("platform:cns3xxx-ehci");
+
+static struct platform_driver cns3xxx_ehci_driver = {
+       .probe = cns3xxx_ehci_probe,
+       .remove = cns3xxx_ehci_remove,
+       .driver = {
+               .name = "cns3xxx-ehci",
+       },
+};