diff options
Diffstat (limited to 'drivers/usb/host/ohci-ppc-soc.c')
| -rw-r--r-- | drivers/usb/host/ohci-ppc-soc.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-ppc-soc.c b/drivers/usb/host/ohci-ppc-soc.c new file mode 100644 index 00000000000..17964c39d06 --- /dev/null +++ b/drivers/usb/host/ohci-ppc-soc.c @@ -0,0 +1,234 @@ +/* + * OHCI HCD (Host Controller Driver) for USB. + * + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * (C) Copyright 2002 Hewlett-Packard Company + * (C) Copyright 2003-2005 MontaVista Software Inc. + * + * Bus Glue for PPC On-Chip OHCI driver + * Tested on Freescale MPC5200 and IBM STB04xxx + * + * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c + * + * This file is licenced under the GPL. + */ + +#include <asm/usb.h> + +/* configure so an HC device and id are always provided */ +/* always called with process context; sleeping is OK */ + +/** + * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs + * Context: !in_interrupt() + * + * Allocates basic resources for this USB host controller, and + * then invokes the start() method for the HCD associated with it + * through the hotplug entry's driver_data. + * + * Store this function in the HCD's struct pci_driver as probe(). + */ +static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver, + struct platform_device *pdev) +{ + int retval; + struct usb_hcd *hcd; + struct ohci_hcd *ohci; + struct resource *res; + int irq; + struct usb_hcd_platform_data *pd = pdev->dev.platform_data; + + pr_debug("initializing PPC-SOC USB Controller\n"); + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + pr_debug(__FILE__ ": no irq\n"); + return -ENODEV; + } + irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + pr_debug(__FILE__ ": no reg addr\n"); + return -ENODEV; + } + + hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB"); + if (!hcd) + return -ENOMEM; + hcd->rsrc_start = res->start; + hcd->rsrc_len = res->end - res->start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + pr_debug(__FILE__ ": request_mem_region failed\n"); + retval = -EBUSY; + goto err1; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + pr_debug(__FILE__ ": ioremap failed\n"); + retval = -ENOMEM; + goto err2; + } + + if (pd->start && (retval = pd->start(pdev))) + goto err3; + + ohci = hcd_to_ohci(hcd); + ohci->flags |= OHCI_BIG_ENDIAN; + ohci_hcd_init(ohci); + + retval = usb_add_hcd(hcd, irq, SA_INTERRUPT); + if (retval == 0) + return retval; + + pr_debug("Removing PPC-SOC USB Controller\n"); + if (pd && pd->stop) + pd->stop(pdev); + err3: + iounmap(hcd->regs); + err2: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + err1: + usb_put_hcd(hcd); + return retval; +} + + +/* may be called without controller electrically present */ +/* may be called with controller, bus, and devices active */ + +/** + * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs + * @pdev: USB Host Controller being removed + * Context: !in_interrupt() + * + * Reverses the effect of usb_hcd_ppc_soc_probe(), first invoking + * the HCD's stop() method. It is always called from a thread + * context, normally "rmmod", "apmd", or something similar. + * + */ +static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd, + struct platform_device *pdev) +{ + struct usb_hcd_platform_data *pd = pdev->dev.platform_data; + + usb_remove_hcd(hcd); + + pr_debug("stopping PPC-SOC USB Controller\n"); + if (pd && pd->stop) + pd->stop(pdev); + + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_hcd_put(hcd); +} + +static int __devinit +ohci_ppc_soc_start(struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int ret; + + if ((ret = ohci_init(ohci)) < 0) + return ret; + + if ((ret = ohci_run(ohci)) < 0) { + err("can't start %s", ohci_to_hcd(ohci)->self.bus_name); + ohci_stop(hcd); + return ret; + } + + return 0; +} + +static const struct hc_driver ohci_ppc_soc_hc_driver = { + .description = hcd_name, + .hcd_priv_size = sizeof(struct ohci_hcd), + + /* + * generic hardware linkage + */ + .irq = ohci_irq, + .flags = HCD_USB11 | HCD_MEMORY, + + /* + * basic lifecycle operations + */ + .start = ohci_ppc_soc_start, + .stop = ohci_stop, + + /* + * 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, +#ifdef CONFIG_USB_SUSPEND + .hub_suspend = ohci_hub_suspend, + .hub_resume = ohci_hub_resume, +#endif + .start_port_reset = ohci_start_port_reset, +}; + +static int ohci_hcd_ppc_soc_drv_probe(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + int ret; + + if (usb_disabled()) + return -ENODEV; + + ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev); + return ret; +} + +static int ohci_hcd_ppc_soc_drv_remove(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct usb_hcd *hcd = dev_get_drvdata(dev); + + usb_hcd_ppc_soc_remove(hcd, pdev); + return 0; +} + +static struct device_driver ohci_hcd_ppc_soc_driver = { + .name = "ppc-soc-ohci", + .bus = &platform_bus_type, + .probe = ohci_hcd_ppc_soc_drv_probe, + .remove = ohci_hcd_ppc_soc_drv_remove, +#if defined(CONFIG_USB_SUSPEND) || defined(CONFIG_PM) + /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/ + /*.resume = ohci_hcd_ppc_soc_drv_resume,*/ +#endif +}; + +static int __init ohci_hcd_ppc_soc_init(void) +{ + pr_debug(DRIVER_INFO " (PPC SOC)\n"); + pr_debug("block sizes: ed %d td %d\n", sizeof(struct ed), + sizeof(struct td)); + + return driver_register(&ohci_hcd_ppc_soc_driver); +} + +static void __exit ohci_hcd_ppc_soc_cleanup(void) +{ + driver_unregister(&ohci_hcd_ppc_soc_driver); +} + +module_init(ohci_hcd_ppc_soc_init); +module_exit(ohci_hcd_ppc_soc_cleanup); |