diff options
Diffstat (limited to 'drivers/usb/host/ohci-ppc-of.c')
| -rw-r--r-- | drivers/usb/host/ohci-ppc-of.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c new file mode 100644 index 00000000000..08e237c7bc4 --- /dev/null +++ b/drivers/usb/host/ohci-ppc-of.c @@ -0,0 +1,232 @@ +/* + * 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 2006 Sylvain Munaut <tnt@246tNt.com> + * + * Bus glue for OHCI HC on the of_platform bus + * + * Modified for of_platform bus from ohci-sa1111.c + * + * This file is licenced under the GPL. + */ + +#include <linux/signal.h> + +#include <asm/of_platform.h> +#include <asm/prom.h> + + +static int __devinit +ohci_ppc_of_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_of_hc_driver = { + .description = hcd_name, + .product_desc = "OF OHCI", + .hcd_priv_size = sizeof(struct ohci_hcd), + + /* + * generic hardware linkage + */ + .irq = ohci_irq, + .flags = HCD_USB11 | HCD_MEMORY, + + /* + * basic lifecycle operations + */ + .start = ohci_ppc_of_start, + .stop = ohci_stop, + .shutdown = ohci_shutdown, + + /* + * 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, + .hub_irq_enable = ohci_rhsc_enable, +#ifdef CONFIG_PM + .bus_suspend = ohci_bus_suspend, + .bus_resume = ohci_bus_resume, +#endif + .start_port_reset = ohci_start_port_reset, +}; + + +static int __devinit +ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) +{ + struct device_node *dn = op->node; + struct usb_hcd *hcd; + struct ohci_hcd *ohci; + struct resource res; + int irq; + + int rv; + int is_bigendian; + + if (usb_disabled()) + return -ENODEV; + + is_bigendian = + device_is_compatible(dn, "ohci-bigendian") || + device_is_compatible(dn, "ohci-be"); + + dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n"); + + rv = of_address_to_resource(dn, 0, &res); + if (rv) + return rv; + + hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF 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)) { + printk(KERN_ERR __FILE__ ": request_mem_region failed\n"); + rv = -EBUSY; + goto err_rmr; + } + + irq = irq_of_parse_and_map(dn, 0); + if (irq == NO_IRQ) { + printk(KERN_ERR __FILE__ ": irq_of_parse_and_map failed\n"); + rv = -EBUSY; + goto err_irq; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + printk(KERN_ERR __FILE__ ": ioremap failed\n"); + rv = -ENOMEM; + goto err_ioremap; + } + + ohci = hcd_to_ohci(hcd); + if (is_bigendian) + ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; + + ohci_hcd_init(ohci); + + rv = usb_add_hcd(hcd, irq, 0); + if (rv == 0) + return 0; + + iounmap(hcd->regs); +err_ioremap: + irq_dispose_mapping(irq); +err_irq: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err_rmr: + usb_put_hcd(hcd); + + return rv; +} + +static int ohci_hcd_ppc_of_remove(struct of_device *op) +{ + struct usb_hcd *hcd = dev_get_drvdata(&op->dev); + dev_set_drvdata(&op->dev, NULL); + + dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); + + usb_remove_hcd(hcd); + + iounmap(hcd->regs); + irq_dispose_mapping(hcd->irq); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + + usb_put_hcd(hcd); + + return 0; +} + +static int ohci_hcd_ppc_of_shutdown(struct of_device *op) +{ + struct usb_hcd *hcd = dev_get_drvdata(&op->dev); + + if (hcd->driver->shutdown) + hcd->driver->shutdown(hcd); + + return 0; +} + + +static struct of_device_id ohci_hcd_ppc_of_match[] = { +#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE + { + .name = "usb", + .compatible = "ohci-bigendian", + }, + { + .name = "usb", + .compatible = "ohci-be", + }, +#endif +#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE + { + .name = "usb", + .compatible = "ohci-littledian", + }, + { + .name = "usb", + .compatible = "ohci-le", + }, +#endif + {}, +}; +MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); + +#if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ + !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) +#error "No endianess selected for ppc-of-ohci" +#endif + + +static struct of_platform_driver ohci_hcd_ppc_of_driver = { + .name = "ppc-of-ohci", + .match_table = ohci_hcd_ppc_of_match, + .probe = ohci_hcd_ppc_of_probe, + .remove = ohci_hcd_ppc_of_remove, + .shutdown = ohci_hcd_ppc_of_shutdown, +#ifdef CONFIG_PM + /*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/ + /*.resume = ohci_hcd_ppc_soc_drv_resume,*/ +#endif + .driver = { + .name = "ppc-of-ohci", + .owner = THIS_MODULE, + }, +}; + |