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linux_dsm_epyc7002/drivers/usb/host/ehci-ps3.c
Alan Stern b18ffd49e8 USB: EHCI: update toggle state for linked QHs 
This patch (as1245) fixes a bug in ehci-hcd.  When an URB is queued
for an endpoint whose QH is already in the LINKED state, the QH
doesn't get refreshed.  As a result, if usb_clear_halt() was called
during the time that the QH was linked but idle, the data toggle value
in the QH doesn't get reset.

The symptom is that after a clear_halt, data gets lost and transfers
time out.  This problem is starting to show up now because the
"ehci-hcd unlink speedups" patch causes QHs with no queued URBs to
remain linked for a suitable time.

The patch utilizes the new endpoint_reset mechanism to fix the
problem.  When an endpoint is reset, the new method forcibly unlinks
the QH (if necessary) and safely updates the toggle value.  This
allows qh_update() to be simplified and avoids using usb_device's
toggle bits in a rather unintuitive way.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Tested-by: David <david@unsolicited.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-06-15 21:44:46 -07:00

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/*
* PS3 EHCI Host Controller driver
*
* Copyright (C) 2006 Sony Computer Entertainment Inc.
* Copyright 2006 Sony Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <asm/firmware.h>
#include <asm/ps3.h>
static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
{
int result;
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
ehci->big_endian_mmio = 1;
ehci->caps = hcd->regs;
ehci->regs = hcd->regs + HC_LENGTH(ehci_readl(ehci,
&ehci->caps->hc_capbase));
dbg_hcs_params(ehci, "reset");
dbg_hcc_params(ehci, "reset");
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
result = ehci_halt(ehci);
if (result)
return result;
result = ehci_init(hcd);
if (result)
return result;
ehci_reset(ehci);
return result;
}
static const struct hc_driver ps3_ehci_hc_driver = {
.description = hcd_name,
.product_desc = "PS3 EHCI Host Controller",
.hcd_priv_size = sizeof(struct ehci_hcd),
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
.reset = ps3_ehci_hc_reset,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
.urb_enqueue = ehci_urb_enqueue,
.urb_dequeue = ehci_urb_dequeue,
.endpoint_disable = ehci_endpoint_disable,
.endpoint_reset = ehci_endpoint_reset,
.get_frame_number = ehci_get_frame,
.hub_status_data = ehci_hub_status_data,
.hub_control = ehci_hub_control,
#if defined(CONFIG_PM)
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,
#endif
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
};
static int ps3_ehci_probe(struct ps3_system_bus_device *dev)
{
int result;
struct usb_hcd *hcd;
unsigned int virq;
static u64 dummy_mask = DMA_BIT_MASK(32);
if (usb_disabled()) {
result = -ENODEV;
goto fail_start;
}
result = ps3_open_hv_device(dev);
if (result) {
dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
__func__, __LINE__);
goto fail_open;
}
result = ps3_dma_region_create(dev->d_region);
if (result) {
dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
"(%d)\n", __func__, __LINE__, result);
BUG_ON("check region type");
goto fail_dma_region;
}
result = ps3_mmio_region_create(dev->m_region);
if (result) {
dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n",
__func__, __LINE__);
result = -EPERM;
goto fail_mmio_region;
}
dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__,
__LINE__, dev->m_region->lpar_addr);
result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq);
if (result) {
dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n",
__func__, __LINE__, virq);
result = -EPERM;
goto fail_irq;
}
dev->core.dma_mask = &dummy_mask; /* FIXME: for improper usb code */
hcd = usb_create_hcd(&ps3_ehci_hc_driver, &dev->core, dev_name(&dev->core));
if (!hcd) {
dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__,
__LINE__);
result = -ENOMEM;
goto fail_create_hcd;
}
hcd->rsrc_start = dev->m_region->lpar_addr;
hcd->rsrc_len = dev->m_region->len;
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name))
dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n",
__func__, __LINE__);
hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len);
if (!hcd->regs) {
dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__,
__LINE__);
result = -EPERM;
goto fail_ioremap;
}
dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__,
(unsigned long)hcd->rsrc_start);
dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len %lxh\n", __func__, __LINE__,
(unsigned long)hcd->rsrc_len);
dev_dbg(&dev->core, "%s:%d: hcd->regs %lxh\n", __func__, __LINE__,
(unsigned long)hcd->regs);
dev_dbg(&dev->core, "%s:%d: virq %lu\n", __func__, __LINE__,
(unsigned long)virq);
ps3_system_bus_set_driver_data(dev, hcd);
result = usb_add_hcd(hcd, virq, IRQF_DISABLED);
if (result) {
dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n",
__func__, __LINE__, result);
goto fail_add_hcd;
}
return result;
fail_add_hcd:
iounmap(hcd->regs);
fail_ioremap:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
fail_create_hcd:
ps3_io_irq_destroy(virq);
fail_irq:
ps3_free_mmio_region(dev->m_region);
fail_mmio_region:
ps3_dma_region_free(dev->d_region);
fail_dma_region:
ps3_close_hv_device(dev);
fail_open:
fail_start:
return result;
}
static int ps3_ehci_remove(struct ps3_system_bus_device *dev)
{
unsigned int tmp;
struct usb_hcd *hcd =
(struct usb_hcd *)ps3_system_bus_get_driver_data(dev);
BUG_ON(!hcd);
dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
tmp = hcd->irq;
ehci_shutdown(hcd);
usb_remove_hcd(hcd);
ps3_system_bus_set_driver_data(dev, NULL);
BUG_ON(!hcd->regs);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
ps3_io_irq_destroy(tmp);
ps3_free_mmio_region(dev->m_region);
ps3_dma_region_free(dev->d_region);
ps3_close_hv_device(dev);
return 0;
}
static int ps3_ehci_driver_register(struct ps3_system_bus_driver *drv)
{
return firmware_has_feature(FW_FEATURE_PS3_LV1)
? ps3_system_bus_driver_register(drv)
: 0;
}
static void ps3_ehci_driver_unregister(struct ps3_system_bus_driver *drv)
{
if (firmware_has_feature(FW_FEATURE_PS3_LV1))
ps3_system_bus_driver_unregister(drv);
}
MODULE_ALIAS(PS3_MODULE_ALIAS_EHCI);
static struct ps3_system_bus_driver ps3_ehci_driver = {
.core.name = "ps3-ehci-driver",
.core.owner = THIS_MODULE,
.match_id = PS3_MATCH_ID_EHCI,
.probe = ps3_ehci_probe,
.remove = ps3_ehci_remove,
.shutdown = ps3_ehci_remove,
};
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