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/*
* Sonics Silicon Backplane
* Broadcom USB-core OHCI driver
*
* Copyright 2007 Michael Buesch <mb@bu3sch.de>
*
* Derived from the OHCI-PCI driver
* Copyright 1999 Roman Weissgaerber
* Copyright 2000-2002 David Brownell
* Copyright 1999 Linus Torvalds
* Copyright 1999 Gregory P. Smith
*
* Derived from the USBcore related parts of Broadcom-SB
* Copyright 2005 Broadcom Corporation
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/ssb/ssb.h>
#define SSB_OHCI_TMSLOW_HOSTMODE (1 << 29)
struct ssb_ohci_device {
struct ohci_hcd ohci; /* _must_ be at the beginning. */
u32 enable_flags;
};
static inline
struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd)
{
return (struct ssb_ohci_device *)(hcd->hcd_priv);
}
static int ssb_ohci_reset(struct usb_hcd *hcd)
{
struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
struct ohci_hcd *ohci = &ohcidev->ohci;
int err;
ohci_hcd_init(ohci);
err = ohci_init(ohci);
return err;
}
static int ssb_ohci_start(struct usb_hcd *hcd)
{
struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
struct ohci_hcd *ohci = &ohcidev->ohci;
int err;
err = ohci_run(ohci);
if (err < 0) {
ohci_err(ohci, "can't start\n");
ohci_stop(hcd);
}
return err;
}
#ifdef CONFIG_PM
static int ssb_ohci_hcd_suspend(struct usb_hcd *hcd, pm_message_t message)
{
struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
struct ohci_hcd *ohci = &ohcidev->ohci;
unsigned long flags;
spin_lock_irqsave(&ohci->lock, flags);
ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
ohci_readl(ohci, &ohci->regs->intrdisable); /* commit write */
/* 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);
spin_unlock_irqrestore(&ohci->lock, flags);
return 0;
}
static int ssb_ohci_hcd_resume(struct usb_hcd *hcd)
{
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
usb_hcd_resume_root_hub(hcd);
return 0;
}
#endif /* CONFIG_PM */
static const struct hc_driver ssb_ohci_hc_driver = {
.description = "ssb-usb-ohci",
.product_desc = "SSB OHCI Controller",
.hcd_priv_size = sizeof(struct ssb_ohci_device),
.irq = ohci_irq,
.flags = HCD_MEMORY | HCD_USB11,
.reset = ssb_ohci_reset,
.start = ssb_ohci_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
#ifdef CONFIG_PM
.suspend = ssb_ohci_hcd_suspend,
.resume = ssb_ohci_hcd_resume,
#endif
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
.get_frame_number = ohci_get_frame,
.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 void ssb_ohci_detach(struct ssb_device *dev)
{
struct usb_hcd *hcd = ssb_get_drvdata(dev);
usb_remove_hcd(hcd);
iounmap(hcd->regs);
usb_put_hcd(hcd);
ssb_device_disable(dev, 0);
}
static int ssb_ohci_attach(struct ssb_device *dev)
{
struct ssb_ohci_device *ohcidev;
struct usb_hcd *hcd;
int err = -ENOMEM;
u32 tmp, flags = 0;
if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
flags |= SSB_OHCI_TMSLOW_HOSTMODE;
ssb_device_enable(dev, flags);
hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
dev->dev->bus_id);
if (!hcd)
goto err_dev_disable;
ohcidev = hcd_to_ssb_ohci(hcd);
ohcidev->enable_flags = flags;
tmp = ssb_read32(dev, SSB_ADMATCH0);
hcd->rsrc_start = ssb_admatch_base(tmp);
hcd->rsrc_len = ssb_admatch_size(tmp);
hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs)
goto err_put_hcd;
err = usb_add_hcd(hcd, dev->irq, IRQF_SHARED);
if (err)
goto err_iounmap;
ssb_set_drvdata(dev, hcd);
return err;
err_iounmap:
iounmap(hcd->regs);
err_put_hcd:
usb_put_hcd(hcd);
err_dev_disable:
ssb_device_disable(dev, flags);
return err;
}
static int ssb_ohci_probe(struct ssb_device *dev,
const struct ssb_device_id *id)
{
int err;
u16 chipid_top;
/* USBcores are only connected on embedded devices. */
chipid_top = (dev->bus->chip_id & 0xFF00);
if (chipid_top != 0x4700 && chipid_top != 0x5300)
return -ENODEV;
/* TODO: Probably need checks here; is the core connected? */
if (usb_disabled())
return -ENODEV;
/* We currently always attach SSB_DEV_USB11_HOSTDEV
* as HOST OHCI. If we want to attach it as Client device,
* we must branch here and call into the (yet to
* be written) Client mode driver. Same for remove(). */
err = ssb_ohci_attach(dev);
return err;
}
static void ssb_ohci_remove(struct ssb_device *dev)
{
ssb_ohci_detach(dev);
}
#ifdef CONFIG_PM
static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
{
ssb_device_disable(dev, 0);
return 0;
}
static int ssb_ohci_resume(struct ssb_device *dev)
{
struct usb_hcd *hcd = ssb_get_drvdata(dev);
struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
ssb_device_enable(dev, ohcidev->enable_flags);
return 0;
}
#else /* !CONFIG_PM */
#define ssb_ohci_suspend NULL
#define ssb_ohci_resume NULL
#endif /* CONFIG_PM */
static const struct ssb_device_id ssb_ohci_table[] = {
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
SSB_DEVTABLE_END
};
MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
static struct ssb_driver ssb_ohci_driver = {
.name = KBUILD_MODNAME,
.id_table = ssb_ohci_table,
.probe = ssb_ohci_probe,
.remove = ssb_ohci_remove,
.suspend = ssb_ohci_suspend,
.resume = ssb_ohci_resume,
};
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