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 / ohci-cns3xxx.c

diff --git a/drivers/usb/host/ohci-cns3xxx.c b/drivers/usb/host/ohci-cns3xxx.c
new file mode 100644 (file)
index 0000000..f05ef87
--- /dev/null
+++ b/drivers/usb/host/ohci-cns3xxx.c
@@ -0,0 +1,165 @@
+/*
+ * 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 __devinit
+cns3xxx_ohci_start(struct usb_hcd *hcd)
+{
+       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+       int ret;
+
+       /*
+        * 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);
+       }
+
+       ret = ohci_init(ohci);
+       if (ret < 0)
+               return ret;
+
+       ohci->num_ports = 1;
+
+       ret = ohci_run(ohci);
+       if (ret < 0) {
+               err("can't start %s", hcd->self.bus_name);
+               ohci_stop(hcd);
+               return ret;
+       }
+       return 0;
+}
+
+static const struct hc_driver cns3xxx_ohci_hc_driver = {
+       .description            = hcd_name,
+       .product_desc           = "CNS3XXX OHCI Host controller",
+       .hcd_priv_size          = sizeof(struct ohci_hcd),
+       .irq                    = ohci_irq,
+       .flags                  = HCD_USB11 | HCD_MEMORY,
+       .start                  = cns3xxx_ohci_start,
+       .stop                   = ohci_stop,
+       .shutdown               = ohci_shutdown,
+       .urb_enqueue            = ohci_urb_enqueue,
+       .urb_dequeue            = ohci_urb_dequeue,
+       .endpoint_disable       = ohci_endpoint_disable,
+       .get_frame_number       = ohci_get_frame,
+       .hub_status_data        = ohci_hub_status_data,
+       .hub_control            = ohci_hub_control,
+#ifdef CONFIG_PM
+       .bus_suspend            = ohci_bus_suspend,
+       .bus_resume             = ohci_bus_resume,
+#endif
+       .start_port_reset       = ohci_start_port_reset,
+};
+
+static int cns3xxx_ohci_probe(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       struct usb_hcd *hcd;
+       const struct hc_driver *driver = &cns3xxx_ohci_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, dev, dev_name(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) {
+               dev_dbg(dev, "error mapping memory\n");
+               retval = -EFAULT;
+               goto err2;
+       }
+
+       ohci_hcd_init(hcd_to_ohci(hcd));
+
+       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_ohci_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-ohci");
+
+static struct platform_driver ohci_hcd_cns3xxx_driver = {
+       .probe = cns3xxx_ohci_probe,
+       .remove = cns3xxx_ohci_remove,
+       .driver = {
+               .name = "cns3xxx-ohci",
+       },
+};