mirror of https://gitee.com/openkylin/linux.git
261 lines
6.0 KiB
C
261 lines
6.0 KiB
C
/*
|
|
* Sonics Silicon Backplane
|
|
* Broadcom USB-core OHCI driver
|
|
*
|
|
* Copyright 2007 Michael Buesch <m@bues.ch>
|
|
*
|
|
* 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;
|
|
}
|
|
|
|
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,
|
|
|
|
.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,
|
|
#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);
|
|
|
|
if (hcd->driver->shutdown)
|
|
hcd->driver->shutdown(hcd);
|
|
usb_remove_hcd(hcd);
|
|
iounmap(hcd->regs);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
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 (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) ||
|
|
dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32)))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) {
|
|
/* Put the device into host-mode. */
|
|
flags |= SSB_OHCI_TMSLOW_HOSTMODE;
|
|
ssb_device_enable(dev, flags);
|
|
} else if (dev->id.coreid == SSB_DEV_USB20_HOST) {
|
|
/*
|
|
* USB 2.0 special considerations:
|
|
*
|
|
* In addition to the standard SSB reset sequence, the Host
|
|
* Control Register must be programmed to bring the USB core
|
|
* and various phy components out of reset.
|
|
*/
|
|
ssb_device_enable(dev, 0);
|
|
ssb_write32(dev, 0x200, 0x7ff);
|
|
|
|
/* Change Flush control reg */
|
|
tmp = ssb_read32(dev, 0x400);
|
|
tmp &= ~8;
|
|
ssb_write32(dev, 0x400, tmp);
|
|
tmp = ssb_read32(dev, 0x400);
|
|
|
|
/* Change Shim control reg */
|
|
tmp = ssb_read32(dev, 0x304);
|
|
tmp &= ~0x100;
|
|
ssb_write32(dev, 0x304, tmp);
|
|
tmp = ssb_read32(dev, 0x304);
|
|
|
|
udelay(1);
|
|
|
|
/* Work around for 5354 failures */
|
|
if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
|
|
/* Change syn01 reg */
|
|
tmp = 0x00fe00fe;
|
|
ssb_write32(dev, 0x894, tmp);
|
|
|
|
/* Change syn03 reg */
|
|
tmp = ssb_read32(dev, 0x89c);
|
|
tmp |= 0x1;
|
|
ssb_write32(dev, 0x89c, tmp);
|
|
}
|
|
} else
|
|
ssb_device_enable(dev, 0);
|
|
|
|
hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
|
|
dev_name(dev->dev));
|
|
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);
|
|
|
|
ohci_finish_controller_resume(hcd);
|
|
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_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_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,
|
|
};
|