X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fusb%2Fhost%2Fohci-au1xxx.c;h=2ac4e022a13f6fc68c6ea32702f1bab05713b88a;hb=d26acd92fa990764b72608a68224f46fac377032;hp=68c17f5ea8ea15c4ebfcc34e95ff4fb625978309;hpb=82638844d9a8581bbf33201cc209a14876eca167;p=linux-2.6 diff --git a/drivers/usb/host/ohci-au1xxx.c b/drivers/usb/host/ohci-au1xxx.c index 68c17f5ea8..2ac4e022a1 100644 --- a/drivers/usb/host/ohci-au1xxx.c +++ b/drivers/usb/host/ohci-au1xxx.c @@ -34,7 +34,8 @@ #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) +#define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | \ + USBH_ENABLE_BE) #else #error not byte order defined #endif @@ -46,213 +47,87 @@ #define USB_MCFG_RDCOMB (1<<30) #define USB_MCFG_SSDEN (1<<23) #define USB_MCFG_OHCCLKEN (1<<16) +#ifdef CONFIG_DMA_COHERENT #define USB_MCFG_UCAM (1<<7) +#else +#define USB_MCFG_UCAM (0) +#endif #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_ENABLE_INIT (USB_MCFG_PFEN | USB_MCFG_RDCOMB | \ + USBH_ENABLE_CE | USB_MCFG_SSDEN | \ + USB_MCFG_UCAM | \ + USB_MCFG_OBMEN | USB_MCFG_OMEMEN) + #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) +static void au1xxx_start_ohc(void) { - 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); + au_sync(); 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); + au_writel(au_readl(USB_HOST_CONFIG) | USBH_ENABLE_INIT, USB_HOST_CONFIG); + au_sync(); udelay(1000); - au_writel(USBH_ENABLE_INIT | au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); - au_readl(USB_HOST_CONFIG); - udelay(1000); - -#endif /* Au1200 */ -#ifndef CONFIG_SOC_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)) -#endif 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); + au_writel(au_readl(USB_HOST_CONFIG) | USBH_ENABLE_CE, USB_HOST_CONFIG); + au_sync(); udelay(1000); - /* Disable clock */ - au_writel(~USBH_ENABLE_CE & au_readl(USB_HOST_CONFIG), USB_HOST_CONFIG); - au_readl(USB_HOST_CONFIG); + + au_writel(au_readl(USB_HOST_CONFIG) | USBH_ENABLE_INIT, USB_HOST_CONFIG); + au_sync(); + udelay(2000); #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) +static void au1xxx_stop_ohc(void) { - 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->name); - pr_info("%s: update your board or re-configure the kernel\n", - dev->name); - return -ENODEV; - } +#ifdef CONFIG_SOC_AU1200 + /* Disable mem */ + au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_DISABLE, USB_HOST_CONFIG); + au_sync(); + udelay(1000); #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, IRQF_DISABLED | IRQF_SHARED); - 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); + /* Disable clock */ + au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG); + au_sync(); } -/*-------------------------------------------------------------------------*/ - -static int __devinit -ohci_au1xxx_start (struct usb_hcd *hcd) +static int __devinit ohci_au1xxx_start(struct usb_hcd *hcd) { - struct ohci_hcd *ohci = hcd_to_ohci (hcd); - int ret; + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int ret; - ohci_dbg (ohci, "ohci_au1xxx_start, ohci:%p", ohci); + ohci_dbg(ohci, "ohci_au1xxx_start, ohci:%p", ohci); - if ((ret = ohci_init (ohci)) < 0) + if ((ret = ohci_init(ohci)) < 0) return ret; - if ((ret = ohci_run (ohci)) < 0) { + if ((ret = ohci_run(ohci)) < 0) { err ("can't start %s", hcd->self.bus_name); - ohci_stop (hcd); + ohci_stop(hcd); return ret; } return 0; } -/*-------------------------------------------------------------------------*/ - static const struct hc_driver ohci_au1xxx_hc_driver = { .description = hcd_name, .product_desc = "Au1xxx OHCI", @@ -288,7 +163,6 @@ static const struct hc_driver ohci_au1xxx_hc_driver = { */ .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, @@ -296,18 +170,66 @@ static const struct hc_driver ohci_au1xxx_hc_driver = { .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"); + struct usb_hcd *hcd; if (usb_disabled()) return -ENODEV; - ret = usb_ohci_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev); +#if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT) + /* Au1200 AB USB does not support coherent memory */ + if (!(read_c0_prid() & 0xff)) { + printk(KERN_INFO "%s: this is chip revision AB !!\n", + pdev->name); + printk(KERN_INFO "%s: update your board or re-configure " + "the kernel\n", pdev->name); + return -ENODEV; + } +#endif + + if (pdev->resource[1].flags != IORESOURCE_IRQ) { + pr_debug("resource[1] is not IORESOURCE_IRQ\n"); + return -ENOMEM; + } + + hcd = usb_create_hcd(&ohci_au1xxx_hc_driver, &pdev->dev, "au1xxx"); + if (!hcd) + return -ENOMEM; + + hcd->rsrc_start = pdev->resource[0].start; + hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + pr_debug("request_mem_region failed\n"); + ret = -EBUSY; + goto err1; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + pr_debug("ioremap failed\n"); + ret = -ENOMEM; + goto err2; + } + + au1xxx_start_ohc(); + ohci_hcd_init(hcd_to_ohci(hcd)); + + ret = usb_add_hcd(hcd, pdev->resource[1].start, + IRQF_DISABLED | IRQF_SHARED); + if (ret == 0) { + platform_set_drvdata(pdev, hcd); + return ret; + } + + au1xxx_stop_ohc(); + iounmap(hcd->regs); +err2: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err1: + usb_put_hcd(hcd); return ret; } @@ -315,30 +237,78 @@ 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); + usb_remove_hcd(hcd); + au1xxx_stop_ohc(); + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); + platform_set_drvdata(pdev, NULL); + return 0; } - /*TBD*/ -/*static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *dev) + +#ifdef CONFIG_PM +static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *pdev, + pm_message_t message) { - struct usb_hcd *hcd = platform_get_drvdata(dev); + struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + unsigned long flags; + int rc; + + rc = 0; + + /* Root hub was already suspended. Disable irq emission and + * mark HW unaccessible, bail out if RH has been resumed. Use + * the spinlock to properly synchronize with possible pending + * RH suspend or resume activity. + * + * This is still racy as hcd->state is manipulated outside of + * any locks =P But that will be a different fix. + */ + spin_lock_irqsave(&ohci->lock, flags); + if (hcd->state != HC_STATE_SUSPENDED) { + rc = -EINVAL; + goto bail; + } + ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); + (void)ohci_readl(ohci, &ohci->regs->intrdisable); - return 0; + /* make sure snapshot being resumed re-enumerates everything */ + if (message.event == PM_EVENT_PRETHAW) + ohci_usb_reset(ohci); + + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + + au1xxx_stop_ohc(); +bail: + spin_unlock_irqrestore(&ohci->lock, flags); + + return rc; } -static int ohci_hcd_au1xxx_drv_resume(struct platform_device *dev) + +static int ohci_hcd_au1xxx_drv_resume(struct platform_device *pdev) { - struct usb_hcd *hcd = platform_get_drvdata(dev); + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + au1xxx_start_ohc(); + + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + ohci_finish_controller_resume(hcd); return 0; } -*/ +#else +#define ohci_hcd_au1xxx_drv_suspend NULL +#define ohci_hcd_au1xxx_drv_resume NULL +#endif static struct platform_driver ohci_hcd_au1xxx_driver = { .probe = ohci_hcd_au1xxx_drv_probe, .remove = ohci_hcd_au1xxx_drv_remove, .shutdown = usb_hcd_platform_shutdown, - /*.suspend = ohci_hcd_au1xxx_drv_suspend, */ - /*.resume = ohci_hcd_au1xxx_drv_resume, */ + .suspend = ohci_hcd_au1xxx_drv_suspend, + .resume = ohci_hcd_au1xxx_drv_resume, .driver = { .name = "au1xxx-ohci", .owner = THIS_MODULE,