* (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
* support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
* (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
- * (C) Copyright 2004-2006 Alan Stern, stern@rowland.harvard.edu
+ * (C) Copyright 2004-2005 Alan Stern, stern@rowland.harvard.edu
*
* Intel documents this fairly well, and as far as I know there
* are no royalties or anything like that, but even so there are
*
*/
+#include <linux/config.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include "../core/hcd.h"
#include "uhci-hcd.h"
-#include "pci-quirks.h"
/*
* Version Information
*/
-#define DRIVER_VERSION "v3.0"
+#define DRIVER_VERSION "v2.3"
#define DRIVER_AUTHOR "Linus 'Frodo Rabbit' Torvalds, Johannes Erdfelt, \
Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \
Alan Stern"
* debug = 3, show all TDs in URBs when dumping
*/
#ifdef DEBUG
-#define DEBUG_CONFIGURED 1
static int debug = 1;
-module_param(debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Debug level");
-
#else
-#define DEBUG_CONFIGURED 0
-#define debug 0
+static int debug = 0;
#endif
-
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug level");
static char *errbuf;
#define ERRBUF_LEN (32 * 1024)
static void wakeup_rh(struct uhci_hcd *uhci);
static void uhci_get_current_frame_number(struct uhci_hcd *uhci);
+/* If a transfer is still active after this much time, turn off FSBR */
+#define IDLE_TIMEOUT msecs_to_jiffies(50)
+#define FSBR_DELAY msecs_to_jiffies(50)
+
+/* When we timeout an idle transfer for FSBR, we'll switch it over to */
+/* depth first traversal. We'll do it in groups of this number of TDs */
+/* to make sure it doesn't hog all of the bandwidth */
+#define DEPTH_INTERVAL 5
+
#include "uhci-debug.c"
#include "uhci-q.c"
#include "uhci-hub.c"
+extern void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
+extern int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
+
/*
* Finish up a host controller reset and update the recorded state.
*/
for (port = 0; port < uhci->rh_numports; ++port)
outw(0, uhci->io_addr + USBPORTSC1 + (port * 2));
- uhci->port_c_suspend = uhci->resuming_ports = 0;
+ uhci->port_c_suspend = uhci->suspended_ports =
+ uhci->resuming_ports = 0;
uhci->rh_state = UHCI_RH_RESET;
uhci->is_stopped = UHCI_IS_STOPPED;
uhci_to_hcd(uhci)->state = HC_STATE_HALT;
uhci_to_hcd(uhci)->poll_rh = 0;
-
- uhci->dead = 0; /* Full reset resurrects the controller */
}
/*
* Last rites for a defunct/nonfunctional controller
* or one we don't want to use any more.
*/
-static void uhci_hc_died(struct uhci_hcd *uhci)
+static void hc_died(struct uhci_hcd *uhci)
{
- uhci_get_current_frame_number(uhci);
uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
finish_reset(uhci);
- uhci->dead = 1;
-
- /* The current frame may already be partway finished */
- ++uhci->frame_number;
+ uhci->hc_inaccessible = 1;
}
/*
- * Initialize a controller that was newly discovered or has lost power
- * or otherwise been reset while it was suspended. In none of these cases
- * can we be sure of its previous state.
+ * Initialize a controller that was newly discovered or has just been
+ * resumed. In either case we can't be sure of its previous state.
*/
static void check_and_reset_hc(struct uhci_hcd *uhci)
{
outl(uhci->frame_dma_handle, uhci->io_addr + USBFLBASEADD);
/* Set the current frame number */
- outw(uhci->frame_number & UHCI_MAX_SOF_NUMBER,
- uhci->io_addr + USBFRNUM);
+ outw(uhci->frame_number, uhci->io_addr + USBFRNUM);
/* Mark controller as not halted before we enable interrupts */
uhci_to_hcd(uhci)->state = HC_STATE_SUSPENDED;
int int_enable;
auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
- dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
- "%s%s\n", __FUNCTION__,
+ dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
(auto_stop ? " (auto-stop)" : ""));
/* If we get a suspend request when we're already auto-stopped
spin_unlock_irq(&uhci->lock);
msleep(1);
spin_lock_irq(&uhci->lock);
- if (uhci->dead)
+ if (uhci->hc_inaccessible) /* Died */
return;
}
if (!(inw(uhci->io_addr + USBSTS) & USBSTS_HCH))
- dev_warn(&uhci_to_hcd(uhci)->self.root_hub->dev,
- "Controller not stopped yet!\n");
+ dev_warn(uhci_dev(uhci), "Controller not stopped yet!\n");
uhci_get_current_frame_number(uhci);
+ smp_wmb();
uhci->rh_state = new_state;
uhci->is_stopped = UHCI_IS_STOPPED;
uhci_to_hcd(uhci)->poll_rh = !int_enable;
uhci_scan_schedule(uhci, NULL);
- uhci_fsbr_off(uhci);
}
static void start_rh(struct uhci_hcd *uhci)
{
uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
uhci->is_stopped = 0;
+ smp_wmb();
/* Mark it configured and running with a 64-byte max packet.
* All interrupts are enabled, even though RESUME won't do anything.
__releases(uhci->lock)
__acquires(uhci->lock)
{
- dev_dbg(&uhci_to_hcd(uhci)->self.root_hub->dev,
- "%s%s\n", __FUNCTION__,
+ dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
uhci->rh_state == UHCI_RH_AUTO_STOPPED ?
" (auto-start)" : "");
spin_unlock_irq(&uhci->lock);
msleep(20);
spin_lock_irq(&uhci->lock);
- if (uhci->dead)
+ if (uhci->hc_inaccessible) /* Died */
return;
/* End Global Resume and wait for EOP to be sent */
dev_err(uhci_dev(uhci),
"host controller halted, "
"very bad!\n");
- if (debug > 1 && errbuf) {
- /* Print the schedule for debugging */
- uhci_sprint_schedule(uhci,
- errbuf, ERRBUF_LEN);
- lprintk(errbuf);
- }
- uhci_hc_died(uhci);
+ hc_died(uhci);
/* Force a callback in case there are
* pending unlinks */
/*
* Store the current frame number in uhci->frame_number if the controller
- * is runnning. Expand from 11 bits (of which we use only 10) to a
- * full-sized integer.
- *
- * Like many other parts of the driver, this code relies on being polled
- * more than once per second as long as the controller is running.
+ * is runnning
*/
static void uhci_get_current_frame_number(struct uhci_hcd *uhci)
{
- if (!uhci->is_stopped) {
- unsigned delta;
-
- delta = (inw(uhci->io_addr + USBFRNUM) - uhci->frame_number) &
- (UHCI_NUMFRAMES - 1);
- uhci->frame_number += delta;
- }
+ if (!uhci->is_stopped)
+ uhci->frame_number = inw(uhci->io_addr + USBFRNUM);
}
/*
{
int i;
- if (DEBUG_CONFIGURED) {
- spin_lock_irq(&uhci->lock);
- uhci->is_initialized = 0;
- spin_unlock_irq(&uhci->lock);
-
- debugfs_remove(uhci->dentry);
- }
-
for (i = 0; i < UHCI_NUM_SKELQH; i++)
uhci_free_qh(uhci, uhci->skelqh[i]);
dma_free_coherent(uhci_dev(uhci),
UHCI_NUMFRAMES * sizeof(*uhci->frame),
uhci->frame, uhci->frame_dma_handle);
+
+ debugfs_remove(uhci->dentry);
}
-static int uhci_init(struct usb_hcd *hcd)
+static int uhci_reset(struct usb_hcd *hcd)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
unsigned io_size = (unsigned) hcd->rsrc_len;
{
struct usb_hcd *hcd = (struct usb_hcd *) pci_get_drvdata(pdev);
- uhci_hc_died(hcd_to_uhci(hcd));
+ hc_died(hcd_to_uhci(hcd));
}
/*
hcd->uses_new_polling = 1;
+ dentry = debugfs_create_file(hcd->self.bus_name,
+ S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root, uhci,
+ &uhci_debug_operations);
+ if (!dentry) {
+ dev_err(uhci_dev(uhci),
+ "couldn't create uhci debugfs entry\n");
+ retval = -ENOMEM;
+ goto err_create_debug_entry;
+ }
+ uhci->dentry = dentry;
+
+ uhci->fsbr = 0;
+ uhci->fsbrtimeout = 0;
+
spin_lock_init(&uhci->lock);
- setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout,
- (unsigned long) uhci);
- INIT_LIST_HEAD(&uhci->idle_qh_list);
- init_waitqueue_head(&uhci->waitqh);
+ INIT_LIST_HEAD(&uhci->qh_remove_list);
- if (DEBUG_CONFIGURED) {
- dentry = debugfs_create_file(hcd->self.bus_name,
- S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root,
- uhci, &uhci_debug_operations);
- if (!dentry) {
- dev_err(uhci_dev(uhci), "couldn't create uhci "
- "debugfs entry\n");
- retval = -ENOMEM;
- goto err_create_debug_entry;
- }
- uhci->dentry = dentry;
- }
+ INIT_LIST_HEAD(&uhci->td_remove_list);
+
+ INIT_LIST_HEAD(&uhci->urb_remove_list);
+
+ INIT_LIST_HEAD(&uhci->urb_list);
+
+ INIT_LIST_HEAD(&uhci->complete_list);
+
+ init_waitqueue_head(&uhci->waitqh);
uhci->frame = dma_alloc_coherent(uhci_dev(uhci),
UHCI_NUMFRAMES * sizeof(*uhci->frame),
}
for (i = 0; i < UHCI_NUM_SKELQH; i++) {
- uhci->skelqh[i] = uhci_alloc_qh(uhci, NULL, NULL);
+ uhci->skelqh[i] = uhci_alloc_qh(uhci);
if (!uhci->skelqh[i]) {
dev_err(uhci_dev(uhci), "unable to allocate QH\n");
goto err_alloc_skelqh;
uhci->skel_int16_qh->link =
uhci->skel_int8_qh->link =
uhci->skel_int4_qh->link =
- uhci->skel_int2_qh->link = UHCI_PTR_QH |
- cpu_to_le32(uhci->skel_int1_qh->dma_handle);
-
- uhci->skel_int1_qh->link = UHCI_PTR_QH |
- cpu_to_le32(uhci->skel_ls_control_qh->dma_handle);
- uhci->skel_ls_control_qh->link = UHCI_PTR_QH |
- cpu_to_le32(uhci->skel_fs_control_qh->dma_handle);
- uhci->skel_fs_control_qh->link = UHCI_PTR_QH |
- cpu_to_le32(uhci->skel_bulk_qh->dma_handle);
- uhci->skel_bulk_qh->link = UHCI_PTR_QH |
- cpu_to_le32(uhci->skel_term_qh->dma_handle);
+ uhci->skel_int2_qh->link =
+ cpu_to_le32(uhci->skel_int1_qh->dma_handle) | UHCI_PTR_QH;
+ uhci->skel_int1_qh->link = cpu_to_le32(uhci->skel_ls_control_qh->dma_handle) | UHCI_PTR_QH;
+
+ uhci->skel_ls_control_qh->link = cpu_to_le32(uhci->skel_fs_control_qh->dma_handle) | UHCI_PTR_QH;
+ uhci->skel_fs_control_qh->link = cpu_to_le32(uhci->skel_bulk_qh->dma_handle) | UHCI_PTR_QH;
+ uhci->skel_bulk_qh->link = cpu_to_le32(uhci->skel_term_qh->dma_handle) | UHCI_PTR_QH;
/* This dummy TD is to work around a bug in Intel PIIX controllers */
uhci_fill_td(uhci->term_td, 0, uhci_explen(0) |
/*
* ffs (Find First bit Set) does exactly what we need:
- * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[8],
- * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[7], etc.
- * ffs >= 7 => not on any high-period queue, so use
- * skel_int1_qh = skelqh[9].
+ * 1,3,5,... => ffs = 0 => use skel_int2_qh = skelqh[6],
+ * 2,6,10,... => ffs = 1 => use skel_int4_qh = skelqh[5], etc.
+ * ffs > 6 => not on any high-period queue, so use
+ * skel_int1_qh = skelqh[7].
* Add UHCI_NUMFRAMES to insure at least one bit is set.
*/
- irq = 8 - (int) __ffs(i + UHCI_NUMFRAMES);
- if (irq <= 1)
- irq = 9;
+ irq = 6 - (int) __ffs(i + UHCI_NUMFRAMES);
+ if (irq < 0)
+ irq = 7;
/* Only place we don't use the frame list routines */
uhci->frame[i] = UHCI_PTR_QH |
mb();
configure_hc(uhci);
- uhci->is_initialized = 1;
start_rh(uhci);
return 0;
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
spin_lock_irq(&uhci->lock);
- if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) && !uhci->dead)
- uhci_hc_died(uhci);
+ if (!uhci->hc_inaccessible)
+ hc_died(uhci);
uhci_scan_schedule(uhci, NULL);
spin_unlock_irq(&uhci->lock);
- del_timer_sync(&uhci->fsbr_timer);
release_uhci(uhci);
}
static int uhci_rh_suspend(struct usb_hcd *hcd)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
- int rc = 0;
spin_lock_irq(&uhci->lock);
- if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
- rc = -ESHUTDOWN;
- else if (!uhci->dead)
+ if (!uhci->hc_inaccessible) /* Not dead */
suspend_rh(uhci, UHCI_RH_SUSPENDED);
spin_unlock_irq(&uhci->lock);
- return rc;
+ return 0;
}
static int uhci_rh_resume(struct usb_hcd *hcd)
int rc = 0;
spin_lock_irq(&uhci->lock);
- if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
- dev_warn(&hcd->self.root_hub->dev, "HC isn't running!\n");
- rc = -ESHUTDOWN;
- } else if (!uhci->dead)
+ if (uhci->hc_inaccessible) {
+ if (uhci->rh_state == UHCI_RH_SUSPENDED) {
+ dev_warn(uhci_dev(uhci), "HC isn't running!\n");
+ rc = -ENODEV;
+ }
+ /* Otherwise the HC is dead */
+ } else
wakeup_rh(uhci);
spin_unlock_irq(&uhci->lock);
return rc;
dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
spin_lock_irq(&uhci->lock);
- if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) || uhci->dead)
- goto done_okay; /* Already suspended or dead */
+ if (uhci->hc_inaccessible) /* Dead or already suspended */
+ goto done;
if (uhci->rh_state > UHCI_RH_SUSPENDED) {
dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
*/
pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP, 0);
mb();
+ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+ uhci->hc_inaccessible = 1;
hcd->poll_rh = 0;
/* FIXME: Enable non-PME# remote wakeup? */
-done_okay:
- clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
done:
spin_unlock_irq(&uhci->lock);
return rc;
dev_dbg(uhci_dev(uhci), "%s\n", __FUNCTION__);
/* Since we aren't in D3 any more, it's safe to set this flag
- * even if the controller was dead.
+ * even if the controller was dead. It might not even be dead
+ * any more, if the firmware or quirks code has reset it.
*/
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
mb();
+ if (uhci->rh_state == UHCI_RH_RESET) /* Dead */
+ return 0;
spin_lock_irq(&uhci->lock);
/* FIXME: Disable non-PME# remote wakeup? */
- /* The firmware or a boot kernel may have changed the controller
- * settings during a system wakeup. Check it and reconfigure
- * to avoid problems.
+ uhci->hc_inaccessible = 0;
+
+ /* The BIOS may have changed the controller settings during a
+ * system wakeup. Check it and reconfigure to avoid problems.
*/
check_and_reset_hc(uhci);
-
- /* If the controller was dead before, it's back alive now */
configure_hc(uhci);
if (uhci->rh_state == UHCI_RH_RESET) {
}
#endif
-/* Wait until a particular device/endpoint's QH is idle, and free it */
+/* Wait until all the URBs for a particular device/endpoint are gone */
static void uhci_hcd_endpoint_disable(struct usb_hcd *hcd,
- struct usb_host_endpoint *hep)
+ struct usb_host_endpoint *ep)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
- struct uhci_qh *qh;
- spin_lock_irq(&uhci->lock);
- qh = (struct uhci_qh *) hep->hcpriv;
- if (qh == NULL)
- goto done;
-
- while (qh->state != QH_STATE_IDLE) {
- ++uhci->num_waiting;
- spin_unlock_irq(&uhci->lock);
- wait_event_interruptible(uhci->waitqh,
- qh->state == QH_STATE_IDLE);
- spin_lock_irq(&uhci->lock);
- --uhci->num_waiting;
- }
-
- uhci_free_qh(uhci, qh);
-done:
- spin_unlock_irq(&uhci->lock);
+ wait_event_interruptible(uhci->waitqh, list_empty(&ep->urb_list));
}
static int uhci_hcd_get_frame_number(struct usb_hcd *hcd)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
- unsigned frame_number;
- unsigned delta;
+ unsigned long flags;
+ int is_stopped;
+ int frame_number;
/* Minimize latency by avoiding the spinlock */
- frame_number = uhci->frame_number;
- barrier();
- delta = (inw(uhci->io_addr + USBFRNUM) - frame_number) &
- (UHCI_NUMFRAMES - 1);
- return frame_number + delta;
+ local_irq_save(flags);
+ is_stopped = uhci->is_stopped;
+ smp_rmb();
+ frame_number = (is_stopped ? uhci->frame_number :
+ inw(uhci->io_addr + USBFRNUM));
+ local_irq_restore(flags);
+ return frame_number;
}
static const char hcd_name[] = "uhci_hcd";
.flags = HCD_USB11,
/* Basic lifecycle operations */
- .reset = uhci_init,
+ .reset = uhci_reset,
.start = uhci_start,
#ifdef CONFIG_PM
.suspend = uhci_suspend,
static const struct pci_device_id uhci_pci_ids[] = { {
/* handle any USB UHCI controller */
- PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
+ PCI_DEVICE_CLASS(((PCI_CLASS_SERIAL_USB << 8) | 0x00), ~0),
.driver_data = (unsigned long) &uhci_driver,
}, { /* end: all zeroes */ }
};
if (usb_disabled())
return -ENODEV;
- if (DEBUG_CONFIGURED) {
+ if (debug) {
errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
if (!errbuf)
goto errbuf_failed;
- uhci_debugfs_root = debugfs_create_dir("uhci", NULL);
- if (!uhci_debugfs_root)
- goto debug_failed;
}
+ uhci_debugfs_root = debugfs_create_dir("uhci", NULL);
+ if (!uhci_debugfs_root)
+ goto debug_failed;
+
uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
sizeof(struct urb_priv), 0, 0, NULL, NULL);
if (!uhci_up_cachep)
git://git.onelab.eu / linux-2.6.git / blobdiff