--- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -583,7 +583,6 @@ static int ohci_run (struct ohci_hcd *oh /* boot firmware should have set this up (5.1.1.3.1) */ if (first) { - val = ohci_readl (ohci, &ohci->regs->fminterval); ohci->fminterval = val & 0x3fff; if (ohci->fminterval != FI) @@ -667,6 +666,9 @@ retry: periodic_reinit (ohci); + if (ohci->flags & OHCI_QUIRK_INIT_FMINTERVAL) + ohci_writel (ohci, ohci->fminterval, &ohci->regs->fminterval); + /* some OHCI implementations are finicky about how they init. * bogus values here mean not even enumeration could work. */ @@ -1061,6 +1063,11 @@ MODULE_LICENSE ("GPL"); #define PLATFORM_DRIVER ohci_hcd_da8xx_driver #endif +#ifdef CONFIG_ARCH_CNS21XX +#include "ohci-cns21xx.c" +#define PLATFORM_DRIVER ohci_cns21xx_driver +#endif + #if defined(CONFIG_CPU_SUBTYPE_SH7720) || \ defined(CONFIG_CPU_SUBTYPE_SH7721) || \ defined(CONFIG_CPU_SUBTYPE_SH7763) || \ --- /dev/null +++ b/drivers/usb/host/ohci-cns21xx.c @@ -0,0 +1,175 @@ +/* + * Copyright (c) 2008 Cavium Networks + * Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org> + * + * 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 <mach/cns21xx.h> + +#define DRIVER_NAME "cns21xx-ohci" + +static int __devinit cns21xx_ohci_start(struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int ret; + + ret = ohci_init(ohci); + if (ret) + return ret; + + ret = ohci_run(ohci); + if (ret) { + err("can't start %s", ohci_to_hcd(ohci)->self.bus_name); + goto err; + } + + return 0; + +err: + ohci_stop(hcd); + return ret; +} + +static const struct hc_driver ohci_cns21xx_hc_driver = { + .description = hcd_name, + .product_desc = "cns21xx-ohci", + .hcd_priv_size = sizeof(struct ohci_hcd), + + /* + * generic hardware linkage + */ + .irq = ohci_irq, + .flags = HCD_USB11 | HCD_MEMORY, + + /* + * basic lifecycle operations + */ + .start = cns21xx_ohci_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, + .start_port_reset = ohci_start_port_reset, +}; + +static void cns21xx_ohci_init_hc(void) +{ + __raw_writel(0x146, CNS21XX_OHCI_CONFIG_BASE_VIRT + 0x04); + __raw_writel(0x200, CNS21XX_OHCI_CONFIG_BASE_VIRT + 0x44); + msleep(100); +} + +static int ohci_cns21xx_probe(struct platform_device *pdev) +{ + struct usb_hcd *hcd; + struct resource *res; + struct ohci_hcd *ohci; + int irq; + int ret; + + if (usb_disabled()) + return -ENODEV; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_dbg(&pdev->dev, "no IRQ specified for %s\n", + dev_name(&pdev->dev)); + return -ENODEV; + } + irq = res->start; + + hcd = usb_create_hcd(&ohci_cns21xx_hc_driver, &pdev->dev, + dev_name(&pdev->dev)); + if (!hcd) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_dbg(&pdev->dev, "no base address specified for %s\n", + dev_name(&pdev->dev)); + ret = -ENODEV; + goto err_put_hcd; + } + 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)) { + dev_dbg(&pdev->dev, "controller already in use\n"); + ret = -EBUSY; + goto err_put_hcd; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + dev_dbg(&pdev->dev, "error mapping memory\n"); + ret = -EFAULT; + goto err_release_region; + } + + cns21xx_ohci_init_hc(); + + ohci = hcd_to_ohci(hcd); + ohci->flags |= OHCI_QUIRK_INIT_FMINTERVAL; + ohci_hcd_init(ohci); + + ret = usb_add_hcd(hcd, irq, IRQF_DISABLED); + if (ret) + goto err_unmap; + + platform_set_drvdata(pdev, hcd); + return 0; + +err_unmap: + iounmap(hcd->regs); +err_release_region: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err_put_hcd: + usb_put_hcd(hcd); + return ret; +} + +static int ohci_cns21xx_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); + usb_put_hcd(hcd); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver ohci_cns21xx_driver = { + .probe = ohci_cns21xx_probe, + .remove = ohci_cns21xx_remove, + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .owner = THIS_MODULE, + .name = DRIVER_NAME, + }, +}; + +MODULE_ALIAS("platform:" DRIVER_NAME); --- a/drivers/usb/host/ohci.h +++ b/drivers/usb/host/ohci.h @@ -403,6 +403,7 @@ struct ohci_hcd { #define OHCI_QUIRK_HUB_POWER 0x100 /* distrust firmware power/oc setup */ #define OHCI_QUIRK_AMD_ISO 0x200 /* ISO transfers*/ #define OHCI_QUIRK_AMD_PREFETCH 0x400 /* pre-fetch for ISO transfer */ +#define OHCI_QUIRK_INIT_FMINTERVAL 0x800 /* fminterval must be initialized */ // there are also chip quirks/bugs in init logic struct work_struct nec_work; /* Worker for NEC quirk */ --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -299,6 +299,7 @@ config ARCH_CNS21XX select PLAT_FA_GPIO select ARCH_REQUIRE_GPIOLIB select ARM_L1_CACHE_SHIFT_4 + select USB_ARCH_HAS_OHCI help Support for Cavium Networks CNS21xx family.