279 lines
6.7 KiB
C
279 lines
6.7 KiB
C
|
/*
|
||
|
|
* Sonics Silicon Backplane
|
||
|
|
* Broadcom USB-core driver (SSB bus glue)
|
||
|
|
*
|
||
|
|
* Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
|
||
|
|
*
|
||
|
|
* Based on ssb-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 2005-2011 Broadcom Corporation
|
||
|
|
*
|
||
|
|
* Licensed under the GNU/GPL. See COPYING for details.
|
||
|
|
*/
|
||
|
|
#include <linux/ssb/ssb.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/usb/ehci_pdriver.h>
|
||
|
|
#include <linux/usb/ohci_pdriver.h>
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Hauke Mehrtens");
|
||
|
|
MODULE_DESCRIPTION("Common USB driver for SSB Bus");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
|
||
|
|
#define SSB_HCD_TMSLOW_HOSTMODE (1 << 29)
|
||
|
|
|
||
|
|
struct ssb_hcd_device {
|
||
|
|
struct platform_device *ehci_dev;
|
||
|
|
struct platform_device *ohci_dev;
|
||
|
|
|
||
|
|
u32 enable_flags;
|
||
|
|
};
|
||
|
|
|
||
|
|
static void ssb_hcd_5354wa(struct ssb_device *dev)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_SSB_DRIVER_MIPS
|
||
|
|
/* Work around for 5354 failures */
|
||
|
|
if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) {
|
||
|
|
/* Change syn01 reg */
|
||
|
|
ssb_write32(dev, 0x894, 0x00fe00fe);
|
||
|
|
|
||
|
|
/* Change syn03 reg */
|
||
|
|
ssb_write32(dev, 0x89c, ssb_read32(dev, 0x89c) | 0x1);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ssb_hcd_usb20wa(struct ssb_device *dev)
|
||
|
|
{
|
||
|
|
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_write32(dev, 0x200, 0x7ff);
|
||
|
|
|
||
|
|
/* Change Flush control reg */
|
||
|
|
ssb_write32(dev, 0x400, ssb_read32(dev, 0x400) & ~8);
|
||
|
|
ssb_read32(dev, 0x400);
|
||
|
|
|
||
|
|
/* Change Shim control reg */
|
||
|
|
ssb_write32(dev, 0x304, ssb_read32(dev, 0x304) & ~0x100);
|
||
|
|
ssb_read32(dev, 0x304);
|
||
|
|
|
||
|
|
udelay(1);
|
||
|
|
|
||
|
|
ssb_hcd_5354wa(dev);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* based on arch/mips/brcm-boards/bcm947xx/pcibios.c */
|
||
|
|
static u32 ssb_hcd_init_chip(struct ssb_device *dev)
|
||
|
|
{
|
||
|
|
u32 flags = 0;
|
||
|
|
|
||
|
|
if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
|
||
|
|
/* Put the device into host-mode. */
|
||
|
|
flags |= SSB_HCD_TMSLOW_HOSTMODE;
|
||
|
|
|
||
|
|
ssb_device_enable(dev, flags);
|
||
|
|
|
||
|
|
ssb_hcd_usb20wa(dev);
|
||
|
|
|
||
|
|
return flags;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct usb_ehci_pdata ehci_pdata = {
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct usb_ohci_pdata ohci_pdata = {
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct platform_device *ssb_hcd_create_pdev(struct ssb_device *dev, bool ohci, u32 addr, u32 len)
|
||
|
|
{
|
||
|
|
struct platform_device *hci_dev;
|
||
|
|
struct resource hci_res[2];
|
||
|
|
int ret = -ENOMEM;
|
||
|
|
|
||
|
|
memset(hci_res, 0, sizeof(hci_res));
|
||
|
|
|
||
|
|
hci_res[0].start = addr;
|
||
|
|
hci_res[0].end = hci_res[0].start + len - 1;
|
||
|
|
hci_res[0].flags = IORESOURCE_MEM;
|
||
|
|
|
||
|
|
hci_res[1].start = dev->irq;
|
||
|
|
hci_res[1].flags = IORESOURCE_IRQ;
|
||
|
|
|
||
|
|
hci_dev = platform_device_alloc(ohci ? "ohci-platform" :
|
||
|
|
"ehci-platform" , 0);
|
||
|
|
if (!hci_dev)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
hci_dev->dev.parent = dev->dev;
|
||
|
|
hci_dev->dev.dma_mask = &hci_dev->dev.coherent_dma_mask;
|
||
|
|
|
||
|
|
ret = platform_device_add_resources(hci_dev, hci_res,
|
||
|
|
ARRAY_SIZE(hci_res));
|
||
|
|
if (ret)
|
||
|
|
goto err_alloc;
|
||
|
|
if (ohci)
|
||
|
|
ret = platform_device_add_data(hci_dev, &ohci_pdata,
|
||
|
|
sizeof(ohci_pdata));
|
||
|
|
else
|
||
|
|
ret = platform_device_add_data(hci_dev, &ehci_pdata,
|
||
|
|
sizeof(ehci_pdata));
|
||
|
|
if (ret)
|
||
|
|
goto err_alloc;
|
||
|
|
ret = platform_device_add(hci_dev);
|
||
|
|
if (ret)
|
||
|
|
goto err_alloc;
|
||
|
|
|
||
|
|
return hci_dev;
|
||
|
|
|
||
|
|
err_alloc:
|
||
|
|
platform_device_put(hci_dev);
|
||
|
|
return ERR_PTR(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ssb_hcd_probe(struct ssb_device *dev,
|
||
|
|
const struct ssb_device_id *id)
|
||
|
|
{
|
||
|
|
int err, tmp;
|
||
|
|
int start, len;
|
||
|
|
u16 chipid_top;
|
||
|
|
u16 coreid = dev->id.coreid;
|
||
|
|
struct ssb_hcd_device *usb_dev;
|
||
|
|
|
||
|
|
/* 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 (dma_set_mask_and_coherent(dev->dma_dev, DMA_BIT_MASK(32)))
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
|
||
|
|
usb_dev = kzalloc(sizeof(struct ssb_hcd_device), GFP_KERNEL);
|
||
|
|
if (!usb_dev)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
/* 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(). */
|
||
|
|
usb_dev->enable_flags = ssb_hcd_init_chip(dev);
|
||
|
|
|
||
|
|
tmp = ssb_read32(dev, SSB_ADMATCH0);
|
||
|
|
|
||
|
|
start = ssb_admatch_base(tmp);
|
||
|
|
len = (coreid == SSB_DEV_USB20_HOST) ? 0x800 : ssb_admatch_size(tmp);
|
||
|
|
usb_dev->ohci_dev = ssb_hcd_create_pdev(dev, true, start, len);
|
||
|
|
if (IS_ERR(usb_dev->ohci_dev)) {
|
||
|
|
err = PTR_ERR(usb_dev->ohci_dev);
|
||
|
|
goto err_free_usb_dev;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (coreid == SSB_DEV_USB20_HOST) {
|
||
|
|
start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
|
||
|
|
usb_dev->ehci_dev = ssb_hcd_create_pdev(dev, false, start, len);
|
||
|
|
if (IS_ERR(usb_dev->ehci_dev)) {
|
||
|
|
err = PTR_ERR(usb_dev->ehci_dev);
|
||
|
|
goto err_unregister_ohci_dev;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ssb_set_drvdata(dev, usb_dev);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_unregister_ohci_dev:
|
||
|
|
platform_device_unregister(usb_dev->ohci_dev);
|
||
|
|
err_free_usb_dev:
|
||
|
|
kfree(usb_dev);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ssb_hcd_remove(struct ssb_device *dev)
|
||
|
|
{
|
||
|
|
struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev);
|
||
|
|
struct platform_device *ohci_dev = usb_dev->ohci_dev;
|
||
|
|
struct platform_device *ehci_dev = usb_dev->ehci_dev;
|
||
|
|
|
||
|
|
if (ohci_dev)
|
||
|
|
platform_device_unregister(ohci_dev);
|
||
|
|
if (ehci_dev)
|
||
|
|
platform_device_unregister(ehci_dev);
|
||
|
|
|
||
|
|
ssb_device_disable(dev, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ssb_hcd_shutdown(struct ssb_device *dev)
|
||
|
|
{
|
||
|
|
ssb_device_disable(dev, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM
|
||
|
|
|
||
|
|
static int ssb_hcd_suspend(struct ssb_device *dev, pm_message_t state)
|
||
|
|
{
|
||
|
|
ssb_device_disable(dev, 0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ssb_hcd_resume(struct ssb_device *dev)
|
||
|
|
{
|
||
|
|
struct ssb_hcd_device *usb_dev = ssb_get_drvdata(dev);
|
||
|
|
|
||
|
|
ssb_device_enable(dev, usb_dev->enable_flags);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* !CONFIG_PM */
|
||
|
|
#define ssb_hcd_suspend NULL
|
||
|
|
#define ssb_hcd_resume NULL
|
||
|
|
#endif /* CONFIG_PM */
|
||
|
|
|
||
|
|
static const struct ssb_device_id ssb_hcd_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_hcd_table);
|
||
|
|
|
||
|
|
static struct ssb_driver ssb_hcd_driver = {
|
||
|
|
.name = KBUILD_MODNAME,
|
||
|
|
.id_table = ssb_hcd_table,
|
||
|
|
.probe = ssb_hcd_probe,
|
||
|
|
.remove = ssb_hcd_remove,
|
||
|
|
.shutdown = ssb_hcd_shutdown,
|
||
|
|
.suspend = ssb_hcd_suspend,
|
||
|
|
.resume = ssb_hcd_resume,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init ssb_hcd_init(void)
|
||
|
|
{
|
||
|
|
return ssb_driver_register(&ssb_hcd_driver);
|
||
|
|
}
|
||
|
|
module_init(ssb_hcd_init);
|
||
|
|
|
||
|
|
static void __exit ssb_hcd_exit(void)
|
||
|
|
{
|
||
|
|
ssb_driver_unregister(&ssb_hcd_driver);
|
||
|
|
}
|
||
|
|
module_exit(ssb_hcd_exit);
|