/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * (C) Copyright 2002 Hewlett-Packard Company * * Bus Glue for AMD Alchemy Au1xxx * * Written by Christopher Hoover * Based on fragments of previous driver by Rusell King et al. * * Modified for LH7A404 from ohci-sa1111.c * by Durgesh Pattamatta * Modified for AMD Alchemy Au1xxx * by Matt Porter * * This file is licenced under the GPL. */ #include #include #include #ifndef CONFIG_SOC_AU1200 #define USBH_ENABLE_BE (1<<0) #define USBH_ENABLE_C (1<<1) #define USBH_ENABLE_E (1<<2) #define USBH_ENABLE_CE (1<<3) #define USBH_ENABLE_RD (1<<4) #ifdef __LITTLE_ENDIAN #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C) #elif __BIG_ENDIAN #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | USBH_ENABLE_BE) #else #error not byte order defined #endif #else /* Au1200 */ #define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG) #define USB_MCFG_PFEN (1<<31) #define USB_MCFG_RDCOMB (1<<30) #define USB_MCFG_SSDEN (1<<23) #define USB_MCFG_OHCCLKEN (1<<16) #define USB_MCFG_UCAM (1<<7) #define USB_MCFG_OBMEN (1<<1) #define USB_MCFG_OMEMEN (1<<0) #define USBH_ENABLE_CE USB_MCFG_OHCCLKEN #ifdef CONFIG_DMA_COHERENT #define USBH_ENABLE_INIT (USB_MCFG_OHCCLKEN \ | USB_MCFG_PFEN | USB_MCFG_RDCOMB \ | USB_MCFG_SSDEN | USB_MCFG_UCAM \ | USB_MCFG_OBMEN | USB_MCFG_OMEMEN) #else #define USBH_ENABLE_INIT (USB_MCFG_OHCCLKEN \ | USB_MCFG_PFEN | USB_MCFG_RDCOMB \ | USB_MCFG_SSDEN \ | USB_MCFG_OBMEN | USB_MCFG_OMEMEN) #endif #define USBH_DISABLE (USB_MCFG_OBMEN | USB_MCFG_OMEMEN) #endif /* Au1200 */ extern int usb_disabled(void); /*-------------------------------------------------------------------------*/ static void au1xxx_start_ohc(struct platform_device *dev) { printk(KERN_DEBUG __FILE__ ": starting Au1xxx OHCI USB Controller\n"); /* enable host controller */ #ifndef CONFIG_SOC_AU1200 au_writel(USBH_ENABLE_CE, USB_HOST_CONFIG); udelay(1000); au_writel(USBH_ENABLE_INIT, USB_HOST_CONFIG); udelay(1000); #else /* Au1200 */ /* write HW defaults again in case Yamon cleared them */ if (au_readl(USB_HOST_CONFIG) == 0) { au_writel(0x00d02000, USB_HOST_CONFIG); au_readl(USB_HOST_CONFIG); udelay(1000); } au_writel(USBH_ENABLE_CE | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); au_readl(USB_HOST_CONFIG); udelay(1000); au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); au_readl(USB_HOST_CONFIG); udelay(1000); #endif /* Au1200 */ /* wait for reset complete (read register twice; see au1500 errata) */ while (au_readl(USB_HOST_CONFIG), !(au_readl(USB_HOST_CONFIG) & USBH_ENABLE_RD)) udelay(1000); printk(KERN_DEBUG __FILE__ ": Clock to USB host has been enabled \n"); } static void au1xxx_stop_ohc(struct platform_device *dev) { printk(KERN_DEBUG __FILE__ ": stopping Au1xxx OHCI USB Controller\n"); #ifndef CONFIG_SOC_AU1200 /* Disable clock */ au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG); #else /* Au1200 */ /* Disable mem */ au_writel(~USBH_DISABLE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); udelay(1000); /* Disable clock */ au_writel(~USBH_ENABLE_CE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); au_readl(USB_HOST_CONFIG); #endif /* Au1200 */ } /*-------------------------------------------------------------------------*/ /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_ohci_au1xxx_probe - initialize Au1xxx-based 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. * */ static int usb_ohci_au1xxx_probe(const struct hc_driver *driver, struct platform_device *dev) { int retval; struct usb_hcd *hcd; #if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT) /* Au1200 AB USB does not support coherent memory */ if (!(read_c0_prid() & 0xff)) { pr_info("%s: this is chip revision AB !!\n", dev->dev.name); pr_info("%s: update your board or re-configure the kernel\n", dev->dev.name); return -ENODEV; } #endif if (dev->resource[1].flags != IORESOURCE_IRQ) { pr_debug("resource[1] is not IORESOURCE_IRQ\n"); return -ENOMEM; } hcd = usb_create_hcd(driver, &dev->dev, "au1xxx"); if (!hcd) return -ENOMEM; hcd->rsrc_start = dev->resource[0].start; hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { pr_debug("request_mem_region failed\n"); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { pr_debug("ioremap failed\n"); retval = -ENOMEM; goto err2; } au1xxx_start_ohc(dev); ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT | SA_SHIRQ); if (retval == 0) return retval; au1xxx_stop_ohc(dev); 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_au1xxx_remove - shutdown processing for Au1xxx-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_au1xxx_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_ohci_au1xxx_remove(struct usb_hcd *hcd, struct platform_device *dev) { usb_remove_hcd(hcd); au1xxx_stop_ohc(dev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } /*-------------------------------------------------------------------------*/ static int __devinit ohci_au1xxx_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; ohci_dbg (ohci, "ohci_au1xxx_start, ohci:%p", ohci); if ((ret = ohci_init (ohci)) < 0) return ret; if ((ret = ohci_run (ohci)) < 0) { err ("can't start %s", hcd->self.bus_name); ohci_stop (hcd); return ret; } return 0; } /*-------------------------------------------------------------------------*/ static const struct hc_driver ohci_au1xxx_hc_driver = { .description = hcd_name, .product_desc = "Au1xxx OHCI", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_au1xxx_start, #ifdef CONFIG_PM /* suspend: ohci_au1xxx_suspend, -- tbd */ /* resume: ohci_au1xxx_resume, -- tbd */ #endif /*CONFIG_PM*/ .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_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; /*-------------------------------------------------------------------------*/ static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev) { int ret; pr_debug ("In ohci_hcd_au1xxx_drv_probe"); if (usb_disabled()) return -ENODEV; ret = usb_ohci_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev); return ret; } static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_ohci_au1xxx_remove(hcd, pdev); return 0; } /*TBD*/ /*static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); return 0; } static int ohci_hcd_au1xxx_drv_resume(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); return 0; } */ static struct platform_driver ohci_hcd_au1xxx_driver = { .probe = ohci_hcd_au1xxx_drv_probe, .remove = ohci_hcd_au1xxx_drv_remove, /*.suspend = ohci_hcd_au1xxx_drv_suspend, */ /*.resume = ohci_hcd_au1xxx_drv_resume, */ .driver = { .name = "au1xxx-ohci", .owner = THIS_MODULE, }, }; static int __init ohci_hcd_au1xxx_init (void) { pr_debug (DRIVER_INFO " (Au1xxx)"); pr_debug ("block sizes: ed %d td %d\n", sizeof (struct ed), sizeof (struct td)); return platform_driver_register(&ohci_hcd_au1xxx_driver); } static void __exit ohci_hcd_au1xxx_cleanup (void) { platform_driver_unregister(&ohci_hcd_au1xxx_driver); } module_init (ohci_hcd_au1xxx_init); module_exit (ohci_hcd_au1xxx_cleanup);