Skip to content

L
linux
Commit 7fc26a9e authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files
Options

USB: removed the usb-ohci driver, as it is no longer being used.

parent 0d84f0ac
Show whitespace changes
Inline Side-by-side
Showing with 0 additions and 3797 deletions
drivers/usb/host/Config.in
View file @ 7fc26a9e
......@@ -6,6 +6,5 @@ dep_tristate ' EHCI HCD (USB 2.0) support' CONFIG_USB_EHCI_HCD $CONFIG_USB
dep_tristate ' OHCI HCD support' CONFIG_USB_OHCI_HCD $CONFIG_USB
dep_tristate ' UHCI HCD (most Intel and VIA) support' CONFIG_USB_UHCI_HCD_ALT $CONFIG_USB
if [ "$CONFIG_ARM" = "y" ]; then
dep_tristate ' SA1111 OHCI-compatible host interface support' CONFIG_USB_OHCI_SA1111 $CONFIG_USB
dep_tristate ' SL811HS support' CONFIG_USB_SL811HS $CONFIG_USB
fi
drivers/usb/host/Makefile
View file @ 7fc26a9e
......@@ -9,8 +9,6 @@ obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
obj-$(CONFIG_USB_UHCI_HCD_ALT) += uhci-hcd.o
obj-$(CONFIG_USB_OHCI) += usb-ohci.o usb-ohci-pci.o
obj-$(CONFIG_USB_OHCI_SA1111) += usb-ohci.o usb-ohci-sa1111.o
obj-$(CONFIG_USB_SL811HS) += hc_sl811.o
include $(TOPDIR)/Rules.make
drivers/usb/host/usb-ohci-pci.c deleted 100644 → 0
View file @ 0d84f0ac
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h> /* for in_interrupt() */
#undef DEBUG
#include <linux/usb.h>
#include "../core/hcd.h"
#include "usb-ohci.h"
#ifdef CONFIG_PMAC_PBOOK
#include <asm/machdep.h>
#include <asm/pmac_feature.h>
#include <asm/pci-bridge.h>
#ifndef CONFIG_PM
#define CONFIG_PM
#endif
#endif
int __devinit
hc_add_ohci(struct pci_dev *dev, int irq, void *membase, unsigned long flags,
ohci_t **ohci, const char *name, const char *slot_name);
extern void hc_remove_ohci(ohci_t *ohci);
extern int hc_start (ohci_t * ohci, struct device *parent_dev);
extern int hc_reset (ohci_t * ohci);
/*-------------------------------------------------------------------------*/
/* Increment the module usage count, start the control thread and
* return success. */
static struct pci_driver ohci_pci_driver;
static int __devinit
hc_found_ohci (struct pci_dev *dev, int irq,
void *mem_base, const struct pci_device_id *id)
{
u8 latency, limit;
ohci_t * ohci;
int ret;
printk(KERN_INFO __FILE__ ": usb-%s, %s\n", dev->slot_name, dev->name);
/* bad pci latencies can contribute to overruns */
pci_read_config_byte (dev, PCI_LATENCY_TIMER, &latency);
if (latency) {
pci_read_config_byte (dev, PCI_MAX_LAT, &limit);
if (limit && limit < latency) {
dbg ("PCI latency reduced to max %d", limit);
pci_write_config_byte (dev, PCI_LATENCY_TIMER, limit);
latency = limit;
}
}
ret = hc_add_ohci(dev, irq, mem_base, id->driver_data,
&ohci, ohci_pci_driver.name, dev->slot_name);
if (ret == 0) {
ohci->pci_latency = latency;
if (hc_start (ohci, &ohci->ohci_dev->dev) < 0) {
err ("can't start usb-%s", ohci->slot_name);
hc_remove_ohci(ohci);
return -EBUSY;
}
#ifdef DEBUG
ohci_dump (ohci, 1);
#endif
}
return ret;
}
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_PM
/* controller died; cleanup debris, then restart */
/* must not be called from interrupt context */
static void hc_restart (ohci_t *ohci)
{
int temp;
int i;
if (ohci->pci_latency)
pci_write_config_byte (ohci->ohci_dev, PCI_LATENCY_TIMER, ohci->pci_latency);
ohci->disabled = 1;
ohci->sleeping = 0;
if (ohci->bus->root_hub)
usb_disconnect (&ohci->bus->root_hub);
/* empty the interrupt branches */
for (i = 0; i < NUM_INTS; i++) ohci->ohci_int_load[i] = 0;
for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table[i] = 0;
/* no EDs to remove */
ohci->ed_rm_list [0] = NULL;
ohci->ed_rm_list [1] = NULL;
/* empty control and bulk lists */
ohci->ed_isotail = NULL;
ohci->ed_controltail = NULL;
ohci->ed_bulktail = NULL;
if ((temp = hc_reset (ohci)) < 0 ||
(temp = hc_start (ohci, &ohci->ohci_dev->dev)) < 0) {
err ("can't restart usb-%s, %d", ohci->ohci_dev->slot_name, temp);
} else
dbg ("restart usb-%s completed", ohci->ohci_dev->slot_name);
}
#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
/* configured so that an OHCI device is always provided */
/* always called with process context; sleeping is OK */
static int __devinit
ohci_pci_probe (struct pci_dev *dev, const struct pci_device_id *id)
{
unsigned long mem_resource, mem_len;
void *mem_base;
int status;
if (pci_enable_device(dev) < 0)
return -ENODEV;
if (!dev->irq) {
err("found OHCI device with no IRQ assigned. check BIOS settings!");
pci_disable_device (dev);
return -ENODEV;
}
/* we read its hardware registers as memory */
mem_resource = pci_resource_start(dev, 0);
mem_len = pci_resource_len(dev, 0);
if (!request_mem_region (mem_resource, mem_len, ohci_pci_driver.name)) {
dbg ("controller already in use");
pci_disable_device (dev);
return -EBUSY;
}
mem_base = ioremap_nocache (mem_resource, mem_len);
if (!mem_base) {
err("Error mapping OHCI memory");
release_mem_region(mem_resource, mem_len);
pci_disable_device (dev);
return -EFAULT;
}
/* controller writes into our memory */
pci_set_master (dev);
status = hc_found_ohci (dev, dev->irq, mem_base, id);
if (status < 0) {
iounmap (mem_base);
release_mem_region(mem_resource, mem_len);
pci_disable_device (dev);
}
return status;
}
/*-------------------------------------------------------------------------*/
/* may be called from interrupt context [interface spec] */
/* may be called without controller present */
/* may be called with controller, bus, and devices active */
static void __devexit
ohci_pci_remove (struct pci_dev *dev)
{
ohci_t *ohci = (ohci_t *) pci_get_drvdata(dev);
void *membase = ohci->regs;
dbg ("remove %s controller usb-%s%s%s",
hcfs2string (ohci->hc_control & OHCI_CTRL_HCFS),
dev->slot_name,
ohci->disabled ? " (disabled)" : "",
in_interrupt () ? " in interrupt" : ""
);
hc_remove_ohci(ohci);
/* unmap the IO address space */
iounmap (membase);
release_mem_region (pci_resource_start (dev, 0), pci_resource_len (dev, 0));
}
#ifdef CONFIG_PM
/*-------------------------------------------------------------------------*/
static int
ohci_pci_suspend (struct pci_dev *dev, u32 state)
{
ohci_t *ohci = (ohci_t *) pci_get_drvdata(dev);
unsigned long flags;
u16 cmd;
if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER) {
dbg ("can't suspend usb-%s (state is %s)", dev->slot_name,
hcfs2string (ohci->hc_control & OHCI_CTRL_HCFS));
return -EIO;
}
/* act as if usb suspend can always be used */
info ("USB suspend: usb-%s", dev->slot_name);
ohci->sleeping = 1;
/* First stop processing */
spin_lock_irqsave (&usb_ed_lock, flags);
ohci->hc_control &= ~(OHCI_CTRL_PLE|OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_IE);
writel (ohci->hc_control, &ohci->regs->control);
writel (OHCI_INTR_SF, &ohci->regs->intrstatus);
(void) readl (&ohci->regs->intrstatus);
spin_unlock_irqrestore (&usb_ed_lock, flags);
/* Wait a frame or two */
mdelay(1);
if (!readl (&ohci->regs->intrstatus) & OHCI_INTR_SF)
mdelay (1);
#ifdef CONFIG_PMAC_PBOOK
if (_machine == _MACH_Pmac)
disable_irq (ohci->irq);
/* else, 2.4 assumes shared irqs -- don't disable */
#endif
/* Enable remote wakeup */
writel (readl(&ohci->regs->intrenable) | OHCI_INTR_RD, &ohci->regs->intrenable);
/* Suspend chip and let things settle down a bit */
ohci->hc_control = OHCI_USB_SUSPEND;
writel (ohci->hc_control, &ohci->regs->control);
(void) readl (&ohci->regs->control);
mdelay (500); /* No schedule here ! */
switch (readl (&ohci->regs->control) & OHCI_CTRL_HCFS) {
case OHCI_USB_RESET:
dbg("Bus in reset phase ???");
break;
case OHCI_USB_RESUME:
dbg("Bus in resume phase ???");
break;
case OHCI_USB_OPER:
dbg("Bus in operational phase ???");
break;
case OHCI_USB_SUSPEND:
dbg("Bus suspended");
break;
}
/* In some rare situations, Apple's OHCI have happily trashed
* memory during sleep. We disable it's bus master bit during
* suspend
*/
pci_read_config_word (dev, PCI_COMMAND, &cmd);
cmd &= ~PCI_COMMAND_MASTER;
pci_write_config_word (dev, PCI_COMMAND, cmd);
#ifdef CONFIG_PMAC_PBOOK
{
struct device_node *of_node;
/* Disable USB PAD & cell clock */
of_node = pci_device_to_OF_node (ohci->ohci_dev);
if (of_node && _machine == _MACH_Pmac)
pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
}
#endif
return 0;
}
/*-------------------------------------------------------------------------*/
static int
ohci_pci_resume (struct pci_dev *dev)
{
ohci_t *ohci = (ohci_t *) pci_get_drvdata(dev);
int temp;
unsigned long flags;
/* guard against multiple resumes */
atomic_inc (&ohci->resume_count);
if (atomic_read (&ohci->resume_count) != 1) {
err ("concurrent PCI resumes for usb-%s", dev->slot_name);
atomic_dec (&ohci->resume_count);
return 0;
}
#ifdef CONFIG_PMAC_PBOOK
{
struct device_node *of_node;
/* Re-enable USB PAD & cell clock */
of_node = pci_device_to_OF_node (ohci->ohci_dev);
if (of_node && _machine == _MACH_Pmac)
pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 1);
}
#endif
/* did we suspend, or were we powered off? */
ohci->hc_control = readl (&ohci->regs->control);
temp = ohci->hc_control & OHCI_CTRL_HCFS;
#ifdef DEBUG
/* the registers may look crazy here */
ohci_dump_status (ohci);
#endif
/* Re-enable bus mastering */
pci_set_master(ohci->ohci_dev);
switch (temp) {
case OHCI_USB_RESET: // lost power
info ("USB restart: usb-%s", dev->slot_name);
hc_restart (ohci);
break;
case OHCI_USB_SUSPEND: // host wakeup
case OHCI_USB_RESUME: // remote wakeup
info ("USB continue: usb-%s from %s wakeup", dev->slot_name,
(temp == OHCI_USB_SUSPEND)
? "host" : "remote");
ohci->hc_control = OHCI_USB_RESUME;
writel (ohci->hc_control, &ohci->regs->control);
(void) readl (&ohci->regs->control);
mdelay (20); /* no schedule here ! */
/* Some controllers (lucent) need a longer delay here */
mdelay (15);
temp = readl (&ohci->regs->control);
temp = ohci->hc_control & OHCI_CTRL_HCFS;
if (temp != OHCI_USB_RESUME) {
err ("controller usb-%s won't resume", dev->slot_name);
ohci->disabled = 1;
return -EIO;
}
/* Some chips likes being resumed first */
writel (OHCI_USB_OPER, &ohci->regs->control);
(void) readl (&ohci->regs->control);
mdelay (3);
/* Then re-enable operations */
spin_lock_irqsave (&usb_ed_lock, flags);
ohci->disabled = 0;
ohci->sleeping = 0;
ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
if (!ohci->ed_rm_list[0] && !ohci->ed_rm_list[1]) {
if (ohci->ed_controltail)
ohci->hc_control |= OHCI_CTRL_CLE;
if (ohci->ed_bulktail)
ohci->hc_control |= OHCI_CTRL_BLE;
}
writel (ohci->hc_control, &ohci->regs->control);
writel (OHCI_INTR_SF, &ohci->regs->intrstatus);
writel (OHCI_INTR_SF, &ohci->regs->intrenable);
/* Check for a pending done list */
writel (OHCI_INTR_WDH, &ohci->regs->intrdisable);
(void) readl (&ohci->regs->intrdisable);
spin_unlock_irqrestore (&usb_ed_lock, flags);
#ifdef CONFIG_PMAC_PBOOK
if (_machine == _MACH_Pmac)
enable_irq (ohci->irq);
#endif
if (ohci->hcca->done_head)
dl_done_list (ohci, dl_reverse_done_list (ohci));
writel (OHCI_INTR_WDH, &ohci->regs->intrenable);
writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
break;
default:
warn ("odd PCI resume for usb-%s", dev->slot_name);
}
/* controller is operational, extra resumes are harmless */
atomic_dec (&ohci->resume_count);
return 0;
}
#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
static const struct pci_device_id __devinitdata ohci_pci_ids [] = { {
/*
* AMD-756 [Viper] USB has a serious erratum when used with
* lowspeed devices like mice.
*/
vendor: 0x1022,
device: 0x740c,
subvendor: PCI_ANY_ID,
subdevice: PCI_ANY_ID,
driver_data: OHCI_QUIRK_AMD756,
} , {
/* handle any USB OHCI controller */
class: ((PCI_CLASS_SERIAL_USB << 8) | 0x10),
class_mask: ~0,
/* no matter who makes it */
vendor: PCI_ANY_ID,
device: PCI_ANY_ID,
subvendor: PCI_ANY_ID,
subdevice: PCI_ANY_ID,
}, { /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE (pci, ohci_pci_ids);
static struct pci_driver ohci_pci_driver = {
name: "usb-ohci",
id_table: &ohci_pci_ids [0],
probe: ohci_pci_probe,
remove: __devexit_p(ohci_pci_remove),
#ifdef CONFIG_PM
suspend: ohci_pci_suspend,
resume: ohci_pci_resume,
#endif /* PM */
};
/*-------------------------------------------------------------------------*/
static int __init ohci_hcd_init (void)
{
return pci_module_init (&ohci_pci_driver);
}
/*-------------------------------------------------------------------------*/
static void __exit ohci_hcd_cleanup (void)
{
pci_unregister_driver (&ohci_pci_driver);
}
module_init (ohci_hcd_init);
module_exit (ohci_hcd_cleanup);
MODULE_LICENSE("GPL");
drivers/usb/host/usb-ohci-sa1111.c deleted 100644 → 0
View file @ 0d84f0ac
/*
* linux/drivers/usb/usb-ohci-sa1111.c
*
* The outline of this code was taken from Brad Parkers <brad@heeltoe.com>
* original OHCI driver modifications, and reworked into a cleaner form
* by Russell King <rmk@arm.linux.org.uk>.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/pci.h>
#include <linux/errno.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/arch/assabet.h>
#include <asm/arch/badge4.h>
#include <asm/hardware/sa1111.h>
#include "usb-ohci.h"
int __devinit
hc_add_ohci(struct pci_dev *dev, int irq, void *membase, unsigned long flags,
ohci_t **ohci, const char *name, const char *slot_name);
extern void hc_remove_ohci(ohci_t *ohci);
extern int hc_start (ohci_t * ohci, struct device *parent_dev);
extern int hc_reset (ohci_t * ohci);
static ohci_t *sa1111_ohci;
static void __init sa1111_ohci_configure(void)
{
unsigned int usb_rst = 0;
printk(KERN_DEBUG __FILE__
": starting SA-1111 OHCI USB Controller\n");
#ifdef CONFIG_SA1100_BADGE4
if (machine_is_badge4())
/* power the bus */
badge4_set_5V(BADGE4_5V_USB, 1);
#endif
if (machine_is_xp860() ||
machine_has_neponset() ||
machine_is_pfs168() ||
machine_is_badge4())
usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;
/*
* Configure the power sense and control lines. Place the USB
* host controller in reset.
*/
USB_RESET = usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET;
/*
* Now, carefully enable the USB clock, and take
* the USB host controller out of reset.
*/
SKPCR |= SKPCR_UCLKEN;
udelay(11);
USB_RESET = usb_rst;
}
static void __exit sa1111_ohci_unconfigure(void)
{
printk(KERN_DEBUG __FILE__
": stopping SA-1111 OHCI USB Controller\n");
/*
* Put the USB host controller into reset.
*/
USB_RESET |= USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET;
/*
* Stop the USB clock.
*/
SKPCR &= ~SKPCR_UCLKEN;
#ifdef CONFIG_SA1100_BADGE4
if (machine_is_badge4())
badge4_set_5V(BADGE4_5V_USB, 0);
#endif
}
static int __init sa1111_ohci_init(void)
{
int ret;
if (!sa1111)
return -ENODEV;
/*
* Request memory resources.
*/
if (!request_mem_region(_USB_OHCI_OP_BASE, _USB_EXTENT, "usb-ohci"))
return -EBUSY;
sa1111_ohci_configure();
/*
* Initialise the generic OHCI driver.
*/
sa1111_ohci = 0;
ret = hc_add_ohci(SA1111_FAKE_PCIDEV, NIRQHCIM,
(void *)&USB_OHCI_OP_BASE, 0, &sa1111_ohci,
"usb-ohci", "sa1111");
if (ret || !sa1111_ohci) {
sa1111_ohci = 0;
sa1111_ohci_unconfigure();
release_mem_region(_USB_OHCI_OP_BASE, _USB_EXTENT);
return -EBUSY;
}
if (hc_start (sa1111_ohci, &sa1111->dev) < 0) {
err ("can't start usb-%s", sa1111_ohci->slot_name);
hc_remove_ohci (sa1111_ohci);
sa1111_ohci = 0;
sa1111_ohci_unconfigure();
release_mem_region(_USB_OHCI_OP_BASE, _USB_EXTENT);
return -EBUSY;
}
return 0;
}
static void __exit sa1111_ohci_exit(void)
{
printk(KERN_DEBUG __FUNCTION__ ": cleaning up\n");
if (sa1111_ohci) {
hc_remove_ohci(sa1111_ohci);
sa1111_ohci = 0;
}
sa1111_ohci_unconfigure();
release_mem_region(_USB_OHCI_OP_BASE, _USB_EXTENT);
printk(KERN_DEBUG __FUNCTION__ ": exiting\n");
}
module_init(sa1111_ohci_init);
module_exit(sa1111_ohci_exit);
MODULE_LICENSE("GPL");
drivers/usb/host/usb-ohci.c deleted 100644 → 0
View file @ 0d84f0ac
/*
* URB OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
*
* [ Initialisation is based on Linus' ]
* [ uhci code and gregs ohci fragments ]
* [ (C) Copyright 1999 Linus Torvalds ]
* [ (C) Copyright 1999 Gregory P. Smith]
*
*
* History:
*
* 2002/03/08 interrupt unlink fix (Matt Hughes), better cleanup on
* load failure (Matthew Frederickson)
* 2002/01/20 async unlink fixes: return -EINPROGRESS (per spec) and
* make interrupt unlink-in-completion work (db)
*
* 2001/09/19 USB_ZERO_PACKET support (Jean Tourrilhes)
* 2001/07/17 power management and pmac cleanup (Benjamin Herrenschmidt)
* 2001/03/24 td/ed hashing to remove bus_to_virt (Steve Longerbeam);
pci_map_single (db)
* 2001/03/21 td and dev/ed allocation uses new pci_pool API (db)
* 2001/03/07 hcca allocation uses pci_alloc_consistent (Steve Longerbeam)
*
* 2000/09/26 fixed races in removing the private portion of the urb
* 2000/09/07 disable bulk and control lists when unlinking the last
* endpoint descriptor in order to avoid unrecoverable errors on
* the Lucent chips. (rwc@sgi)
* 2000/08/29 use bandwidth claiming hooks (thanks Randy!), fix some
* urb unlink probs, indentation fixes
* 2000/08/11 various oops fixes mostly affecting iso and cleanup from
* device unplugs.
* 2000/06/28 use PCI hotplug framework, for better power management
* and for Cardbus support (David Brownell)
* 2000/earlier: fixes for NEC/Lucent chips; suspend/resume handling
* when the controller loses power; handle UE; cleanup; ...
*
* v5.2 1999/12/07 URB 3rd preview,
* v5.1 1999/11/30 URB 2nd preview, cpia, (usb-scsi)
* v5.0 1999/11/22 URB Technical preview, Paul Mackerras powerbook susp/resume
* i386: HUB, Keyboard, Mouse, Printer
*
* v4.3 1999/10/27 multiple HCs, bulk_request
* v4.2 1999/09/05 ISO API alpha, new dev alloc, neg Error-codes
* v4.1 1999/08/27 Randy Dunlap's - ISO API first impl.
* v4.0 1999/08/18
* v3.0 1999/06/25
* v2.1 1999/05/09 code clean up
* v2.0 1999/05/04
* v1.0 1999/04/27 initial release
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/interrupt.h> /* for in_interrupt() */
#ifdef CONFIG_USB_DEBUG
# define DEBUG
#else
# undef DEBUG
#endif
#include <linux/usb.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/unaligned.h>
#include <asm/byteorder.h>
#define OHCI_USE_NPS // force NoPowerSwitching mode
// #define OHCI_VERBOSE_DEBUG /* not always helpful */
#include "../core/hcd.h"
#include "usb-ohci.h"
/*
* Version Information
*/
#define DRIVER_VERSION "v5.3"
#define DRIVER_AUTHOR "Roman Weissgaerber <weissg@vienna.at>, David Brownell"
#define DRIVER_DESC "USB OHCI Host Controller Driver"
#define OHCI_UNLINK_TIMEOUT (HZ / 10)
static LIST_HEAD (ohci_hcd_list);
spinlock_t usb_ed_lock = SPIN_LOCK_UNLOCKED;
/*-------------------------------------------------------------------------*/
/* AMD-756 (D2 rev) reports corrupt register contents in some cases.
* The erratum (#4) description is incorrect. AMD's workaround waits
* till some bits (mostly reserved) are clear; ok for all revs.
*/
#define read_roothub(hc, register, mask) ({ \
u32 temp = readl (&hc->regs->roothub.register); \
if (hc->flags & OHCI_QUIRK_AMD756) \
while (temp & mask) \
temp = readl (&hc->regs->roothub.register); \
temp; })
static u32 roothub_a (struct ohci *hc)
{ return read_roothub (hc, a, 0xfc0fe000); }
static inline u32 roothub_b (struct ohci *hc)
{ return readl (&hc->regs->roothub.b); }
static inline u32 roothub_status (struct ohci *hc)
{ return readl (&hc->regs->roothub.status); }
static u32 roothub_portstatus (struct ohci *hc, int i)
{ return read_roothub (hc, portstatus [i], 0xffe0fce0); }
/*-------------------------------------------------------------------------*
* URB support functions
*-------------------------------------------------------------------------*/
/* free HCD-private data associated with this URB */
static void urb_free_priv (struct ohci *hc, urb_priv_t * urb_priv)
{
int i;
int last = urb_priv->length - 1;
int len;
int dir;
struct td *td;
if (last >= 0) {
/* ISOC, BULK, INTR data buffer starts at td 0
* CTRL setup starts at td 0 */
td = urb_priv->td [0];
len = td->urb->transfer_buffer_length,
dir = usb_pipeout (td->urb->pipe)
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE;
/* unmap CTRL URB setup */
if (usb_pipecontrol (td->urb->pipe)) {
pci_unmap_single (hc->ohci_dev,
td->data_dma, 8, PCI_DMA_TODEVICE);
/* CTRL data buffer starts at td 1 if len > 0 */
if (len && last > 0)
td = urb_priv->td [1];
}
/* unmap data buffer */
if (len && td->data_dma)
pci_unmap_single (hc->ohci_dev, td->data_dma, len, dir);
for (i = 0; i <= last; i++) {
td = urb_priv->td [i];
if (td)
td_free (hc, td);
}
}
kfree (urb_priv);
}
static void urb_rm_priv_locked (struct urb * urb)
{
urb_priv_t * urb_priv = urb->hcpriv;
if (urb_priv) {
urb->hcpriv = NULL;
#ifdef DO_TIMEOUTS
if (urb->timeout) {
list_del (&urb->urb_list);
urb->timeout -= jiffies;
}
#endif
/* Release int/iso bandwidth */
if (urb->bandwidth) {
switch (usb_pipetype(urb->pipe)) {
case PIPE_INTERRUPT:
usb_release_bandwidth (urb->dev, urb, 0);
break;
case PIPE_ISOCHRONOUS:
usb_release_bandwidth (urb->dev, urb, 1);
break;
default:
break;
}
}
urb_free_priv ((struct ohci *)urb->dev->bus->hcpriv, urb_priv);
usb_put_dev (urb->dev);
urb->dev = NULL;
usb_put_urb (urb);
}
}
static void urb_rm_priv (struct urb * urb)
{
unsigned long flags;
spin_lock_irqsave (&usb_ed_lock, flags);
urb_rm_priv_locked (urb);
spin_unlock_irqrestore (&usb_ed_lock, flags);
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
static int sohci_get_current_frame_number (struct usb_device * dev);
/* debug| print the main components of an URB
* small: 0) header + data packets 1) just header */
static void urb_print (struct urb * urb, char * str, int small)
{
unsigned int pipe= urb->pipe;
if (!urb->dev || !urb->dev->bus) {
dbg("%s URB: no dev", str);
return;
}
#ifndef OHCI_VERBOSE_DEBUG
if (urb->status != 0)
#endif
dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,flags:%4x,len:%d/%d,stat:%d(%x)",
str,
sohci_get_current_frame_number (urb->dev),
usb_pipedevice (pipe),
usb_pipeendpoint (pipe),
usb_pipeout (pipe)? 'O': 'I',
usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
(usb_pipecontrol (pipe)? "CTRL": "BULK"),
urb->transfer_flags,
urb->actual_length,
urb->transfer_buffer_length,
urb->status, urb->status);
#ifdef OHCI_VERBOSE_DEBUG
if (!small) {
int i, len;
if (usb_pipecontrol (pipe)) {
printk (KERN_DEBUG __FILE__ ": cmd(8):");
for (i = 0; i < 8 ; i++)
printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
printk ("\n");
}
if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
printk (KERN_DEBUG __FILE__ ": data(%d/%d):",
urb->actual_length,
urb->transfer_buffer_length);
len = usb_pipeout (pipe)?
urb->transfer_buffer_length: urb->actual_length;
for (i = 0; i < 16 && i < len; i++)
printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
printk ("%s stat:%d\n", i < len? "...": "", urb->status);
}
}
#endif
}
/* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
void ep_print_int_eds (ohci_t * ohci, char * str) {
int i, j;
__u32 * ed_p;
for (i= 0; i < 32; i++) {
j = 5;
ed_p = &(ohci->hcca->int_table [i]);
if (*ed_p == 0)
continue;
printk (KERN_DEBUG __FILE__ ": %s branch int %2d(%2x):", str, i, i);
while (*ed_p != 0 && j--) {
ed_t *ed = dma_to_ed (ohci, le32_to_cpup(ed_p));
printk (" ed: %4x;", ed->hwINFO);
ed_p = &ed->hwNextED;
}
printk ("\n");
}
}
static void ohci_dump_intr_mask (char *label, __u32 mask)
{
dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
label,
mask,
(mask & OHCI_INTR_MIE) ? " MIE" : "",
(mask & OHCI_INTR_OC) ? " OC" : "",
(mask & OHCI_INTR_RHSC) ? " RHSC" : "",
(mask & OHCI_INTR_FNO) ? " FNO" : "",
(mask & OHCI_INTR_UE) ? " UE" : "",
(mask & OHCI_INTR_RD) ? " RD" : "",
(mask & OHCI_INTR_SF) ? " SF" : "",
(mask & OHCI_INTR_WDH) ? " WDH" : "",
(mask & OHCI_INTR_SO) ? " SO" : ""
);
}
static void maybe_print_eds (char *label, __u32 value)
{
if (value)
dbg ("%s %08x", label, value);
}
static char *hcfs2string (int state)
{
switch (state) {
case OHCI_USB_RESET: return "reset";
case OHCI_USB_RESUME: return "resume";
case OHCI_USB_OPER: return "operational";
case OHCI_USB_SUSPEND: return "suspend";
}
return "?";
}
// dump control and status registers
static void ohci_dump_status (ohci_t *controller)
{
struct ohci_regs *regs = controller->regs;
__u32 temp;
temp = readl (&regs->revision) & 0xff;
if (temp != 0x10)
dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
temp = readl (&regs->control);
dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
(temp & OHCI_CTRL_RWE) ? " RWE" : "",
(temp & OHCI_CTRL_RWC) ? " RWC" : "",
(temp & OHCI_CTRL_IR) ? " IR" : "",
hcfs2string (temp & OHCI_CTRL_HCFS),
(temp & OHCI_CTRL_BLE) ? " BLE" : "",
(temp & OHCI_CTRL_CLE) ? " CLE" : "",
(temp & OHCI_CTRL_IE) ? " IE" : "",
(temp & OHCI_CTRL_PLE) ? " PLE" : "",
temp & OHCI_CTRL_CBSR
);
temp = readl (&regs->cmdstatus);
dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
(temp & OHCI_SOC) >> 16,
(temp & OHCI_OCR) ? " OCR" : "",
(temp & OHCI_BLF) ? " BLF" : "",
(temp & OHCI_CLF) ? " CLF" : "",
(temp & OHCI_HCR) ? " HCR" : ""
);
ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
// intrdisable always same as intrenable
// ohci_dump_intr_mask ("intrdisable", readl (&regs->intrdisable));
maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
maybe_print_eds ("donehead", readl (&regs->donehead));
}
static void ohci_dump_roothub (ohci_t *controller, int verbose)
{
__u32 temp, ndp, i;
temp = roothub_a (controller);
ndp = (temp & RH_A_NDP);
if (verbose) {
dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
((temp & RH_A_POTPGT) >> 24) & 0xff,
(temp & RH_A_NOCP) ? " NOCP" : "",
(temp & RH_A_OCPM) ? " OCPM" : "",
(temp & RH_A_DT) ? " DT" : "",
(temp & RH_A_NPS) ? " NPS" : "",
(temp & RH_A_PSM) ? " PSM" : "",
ndp
);
temp = roothub_b (controller);
dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
temp,
(temp & RH_B_PPCM) >> 16,
(temp & RH_B_DR)
);
temp = roothub_status (controller);
dbg ("roothub.status: %08x%s%s%s%s%s%s",
temp,
(temp & RH_HS_CRWE) ? " CRWE" : "",
(temp & RH_HS_OCIC) ? " OCIC" : "",
(temp & RH_HS_LPSC) ? " LPSC" : "",
(temp & RH_HS_DRWE) ? " DRWE" : "",
(temp & RH_HS_OCI) ? " OCI" : "",
(temp & RH_HS_LPS) ? " LPS" : ""
);
}
for (i = 0; i < ndp; i++) {
temp = roothub_portstatus (controller, i);
dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
i,
temp,
(temp & RH_PS_PRSC) ? " PRSC" : "",
(temp & RH_PS_OCIC) ? " OCIC" : "",
(temp & RH_PS_PSSC) ? " PSSC" : "",
(temp & RH_PS_PESC) ? " PESC" : "",
(temp & RH_PS_CSC) ? " CSC" : "",
(temp & RH_PS_LSDA) ? " LSDA" : "",
(temp & RH_PS_PPS) ? " PPS" : "",
(temp & RH_PS_PRS) ? " PRS" : "",
(temp & RH_PS_POCI) ? " POCI" : "",
(temp & RH_PS_PSS) ? " PSS" : "",
(temp & RH_PS_PES) ? " PES" : "",
(temp & RH_PS_CCS) ? " CCS" : ""
);
}
}
static void ohci_dump (ohci_t *controller, int verbose)
{
dbg ("OHCI controller usb-%s state", controller->slot_name);
// dumps some of the state we know about
ohci_dump_status (controller);
if (verbose)
ep_print_int_eds (controller, "hcca");
dbg ("hcca frame #%04x", controller->hcca->frame_no);
ohci_dump_roothub (controller, 1);
}
#endif
/*-------------------------------------------------------------------------*
* Interface functions (URB)
*-------------------------------------------------------------------------*/
/* return a request to the completion handler */
static int sohci_return_urb (struct ohci *hc, struct urb * urb)
{
urb_priv_t * urb_priv = urb->hcpriv;
struct urb * urbt = NULL;
unsigned long flags;
int i;
if (!urb_priv)
return -1; /* urb already unlinked */
/* just to be sure */
if (!urb->complete) {
urb_rm_priv (urb);
return -1;
}
#ifdef DEBUG
urb_print (urb, "RET", usb_pipeout (urb->pipe));
#endif
switch (usb_pipetype (urb->pipe)) {
case PIPE_INTERRUPT:
pci_unmap_single (hc->ohci_dev,
urb_priv->td [0]->data_dma,
urb->transfer_buffer_length,
usb_pipeout (urb->pipe)
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE);
urb->complete (urb);
/* implicitly requeued */
urb->actual_length = 0;
urb->status = -EINPROGRESS;
td_submit_urb (urb);
break;
case PIPE_ISOCHRONOUS:
// for (urbt = urb->next; urbt && (urbt != urb); urbt = urbt->next);
if (urbt) { /* send the reply and requeue URB */
pci_unmap_single (hc->ohci_dev,
urb_priv->td [0]->data_dma,
urb->transfer_buffer_length,
usb_pipeout (urb->pipe)
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE);
urb->complete (urb);
spin_lock_irqsave (&usb_ed_lock, flags);
urb->actual_length = 0;
urb->status = -EINPROGRESS;
urb->start_frame = urb_priv->ed->last_iso + 1;
if (urb_priv->state != URB_DEL) {
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].actual_length = 0;
urb->iso_frame_desc[i].status = -EXDEV;
}
td_submit_urb (urb);
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
} else { /* unlink URB, call complete */
urb_rm_priv (urb);
urb->complete (urb);
}
break;
case PIPE_BULK:
case PIPE_CONTROL: /* unlink URB, call complete */
urb_rm_priv (urb);
urb->complete (urb);
break;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* get a transfer request */
static int sohci_submit_urb (struct urb * urb, int mem_flags)
{
ohci_t * ohci;
ed_t * ed;
urb_priv_t * urb_priv;
unsigned int pipe = urb->pipe;
int maxps = usb_maxpacket (urb->dev, pipe, usb_pipeout (pipe));
int i, size = 0;
unsigned long flags;
int bustime = 0;
if (!urb->dev || !urb->dev->bus)
return -ENODEV;
if (urb->hcpriv) /* urb already in use */
return -EINVAL;
// if(usb_endpoint_halted (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe)))
// return -EPIPE;
/* increment the reference count of the urb, as we now also control it */
urb = usb_get_urb (urb);
usb_get_dev (urb->dev);
ohci = (ohci_t *) urb->dev->bus->hcpriv;
#ifdef DEBUG
urb_print (urb, "SUB", usb_pipein (pipe));
#endif
/* handle a request to the virtual root hub */
if (usb_pipedevice (pipe) == ohci->rh.devnum)
return rh_submit_urb (urb);
/* when controller's hung, permit only roothub cleanup attempts
* such as powering down ports */
if (ohci->disabled) {
usb_put_dev (urb->dev);
usb_put_urb (urb);
return -ESHUTDOWN;
}
/* every endpoint has a ed, locate and fill it */
if (!(ed = ep_add_ed (urb->dev, pipe, urb->interval, 1, mem_flags))) {
usb_put_dev (urb->dev);
usb_put_urb (urb);
return -ENOMEM;
}
/* for the private part of the URB we need the number of TDs (size) */
switch (usb_pipetype (pipe)) {
case PIPE_BULK: /* one TD for every 4096 Byte */
size = (urb->transfer_buffer_length - 1) / 4096 + 1;
/* If the transfer size is multiple of the pipe mtu,
* we may need an extra TD to create a empty frame
* Jean II */
if ((urb->transfer_flags & USB_ZERO_PACKET) &&
usb_pipeout (pipe) &&
(urb->transfer_buffer_length != 0) &&
((urb->transfer_buffer_length % maxps) == 0))
size++;
break;
case PIPE_ISOCHRONOUS: /* number of packets from URB */
size = urb->number_of_packets;
if (size <= 0) {
usb_put_dev (urb->dev);
usb_put_urb (urb);
return -EINVAL;
}
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].actual_length = 0;
urb->iso_frame_desc[i].status = -EXDEV;
}
break;
case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
size = (urb->transfer_buffer_length == 0)? 2:
(urb->transfer_buffer_length - 1) / 4096 + 3;
break;
case PIPE_INTERRUPT: /* one TD */
size = 1;
break;
}
/* allocate the private part of the URB */
urb_priv = kmalloc (sizeof (urb_priv_t) + size * sizeof (td_t *), mem_flags);
if (!urb_priv) {
usb_put_dev (urb->dev);
usb_put_urb (urb);
return -ENOMEM;
}
memset (urb_priv, 0, sizeof (urb_priv_t) + size * sizeof (td_t *));
/* fill the private part of the URB */
urb_priv->length = size;
urb_priv->ed = ed;
/* allocate the TDs (updating hash chains) */
spin_lock_irqsave (&usb_ed_lock, flags);
for (i = 0; i < size; i++) {
urb_priv->td[i] = td_alloc (ohci, SLAB_ATOMIC);
if (!urb_priv->td[i]) {
urb_priv->length = i;
urb_free_priv (ohci, urb_priv);
spin_unlock_irqrestore (&usb_ed_lock, flags);
usb_put_dev (urb->dev);
usb_put_urb (urb);
return -ENOMEM;
}
}
if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
urb_free_priv (ohci, urb_priv);
spin_unlock_irqrestore (&usb_ed_lock, flags);
usb_put_dev (urb->dev);
usb_put_urb (urb);
return -EINVAL;
}
/* allocate and claim bandwidth if needed; ISO
* needs start frame index if it was't provided.
*/
switch (usb_pipetype (pipe)) {
case PIPE_ISOCHRONOUS:
if (urb->transfer_flags & USB_ISO_ASAP) {
urb->start_frame = ((ed->state == ED_OPER)
? (ed->last_iso + 1)
: (le16_to_cpu (ohci->hcca->frame_no) + 10)) & 0xffff;
}
/* FALLTHROUGH */
case PIPE_INTERRUPT:
if (urb->bandwidth == 0) {
bustime = usb_check_bandwidth (urb->dev, urb);
}
if (bustime < 0) {
urb_free_priv (ohci, urb_priv);
spin_unlock_irqrestore (&usb_ed_lock, flags);
usb_put_dev (urb->dev);
usb_put_urb (urb);
return bustime;
}
usb_claim_bandwidth (urb->dev, urb, bustime, usb_pipeisoc (urb->pipe));
#ifdef DO_TIMEOUTS
urb->timeout = 0;
#endif
}
urb->actual_length = 0;
urb->hcpriv = urb_priv;
urb->status = -EINPROGRESS;
/* link the ed into a chain if is not already */
if (ed->state != ED_OPER)
ep_link (ohci, ed);
/* fill the TDs and link it to the ed */
td_submit_urb (urb);
#ifdef DO_TIMEOUTS
/* maybe add to ordered list of timeouts */
if (urb->timeout) {
struct list_head *entry;
// FIXME: usb-uhci uses relative timeouts (like this),
// while uhci uses absolute ones (probably better).
// Pick one solution and change the affected drivers.
urb->timeout += jiffies;
list_for_each (entry, &ohci->timeout_list) {
struct urb *next_urb;
next_urb = list_entry (entry, struct urb, urb_list);
if (time_after_eq (urb->timeout, next_urb->timeout))
break;
}
list_add (&urb->urb_list, entry);
/* drive timeouts by SF (messy, but works) */
writel (OHCI_INTR_SF, &ohci->regs->intrenable);
}
#endif
spin_unlock_irqrestore (&usb_ed_lock, flags);
return 0;
}
/*-------------------------------------------------------------------------*/
/* deactivate all TDs and remove the private part of the URB */
/* interrupt callers must use async unlink mode */
static int sohci_unlink_urb (struct urb * urb)
{
unsigned long flags;
ohci_t * ohci;
if (!urb) /* just to be sure */
return -EINVAL;
if (!urb->dev || !urb->dev->bus)
return -ENODEV;
ohci = (ohci_t *) urb->dev->bus->hcpriv;
#ifdef DEBUG
urb_print (urb, "UNLINK", 1);
#endif
/* handle a request to the virtual root hub */
if (usb_pipedevice (urb->pipe) == ohci->rh.devnum)
return rh_unlink_urb (urb);
if (urb->hcpriv && (urb->status == -EINPROGRESS)) {
if (!ohci->disabled) {
urb_priv_t * urb_priv;
/* interrupt code may not sleep; it must use
* async status return to unlink pending urbs.
*/
if (!(urb->transfer_flags & USB_ASYNC_UNLINK)
&& in_interrupt ()) {
err ("bug in call from %p; use async!",
__builtin_return_address(0));
return -EWOULDBLOCK;
}
/* flag the urb and its TDs for deletion in some
* upcoming SF interrupt delete list processing
*/
spin_lock_irqsave (&usb_ed_lock, flags);
urb_priv = urb->hcpriv;
if (!urb_priv || (urb_priv->state == URB_DEL)) {
spin_unlock_irqrestore (&usb_ed_lock, flags);
return 0;
}
urb_priv->state = URB_DEL;
ep_rm_ed (urb->dev, urb_priv->ed);
urb_priv->ed->state |= ED_URB_DEL;
if (!(urb->transfer_flags & USB_ASYNC_UNLINK)) {
DECLARE_WAIT_QUEUE_HEAD (unlink_wakeup);
DECLARE_WAITQUEUE (wait, current);
int timeout = OHCI_UNLINK_TIMEOUT;
add_wait_queue (&unlink_wakeup, &wait);
urb_priv->wait = &unlink_wakeup;
spin_unlock_irqrestore (&usb_ed_lock, flags);
/* wait until all TDs are deleted */
set_current_state(TASK_UNINTERRUPTIBLE);
while (timeout && (urb->status == -EINPROGRESS))
timeout = schedule_timeout (timeout);
set_current_state(TASK_RUNNING);
remove_wait_queue (&unlink_wakeup, &wait);
if (urb->status == -EINPROGRESS) {
err ("unlink URB timeout");
return -ETIMEDOUT;
}
} else {
/* usb_put_dev done in dl_del_list() */
urb->status = -EINPROGRESS;
spin_unlock_irqrestore (&usb_ed_lock, flags);
return -EINPROGRESS;
}
} else {
urb_rm_priv (urb);
if (urb->transfer_flags & USB_ASYNC_UNLINK) {
urb->status = -ECONNRESET;
if (urb->complete)
urb->complete (urb);
} else
urb->status = -ENOENT;
}
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* allocate private data space for a usb device */
static int sohci_alloc_dev (struct usb_device *usb_dev)
{
struct ohci_device * dev;
dev = dev_alloc ((struct ohci *) usb_dev->bus->hcpriv, ALLOC_FLAGS);
if (!dev)
return -ENOMEM;
usb_dev->hcpriv = dev;
return 0;
}
/*-------------------------------------------------------------------------*/
/* may be called from interrupt context */
/* frees private data space of usb device */
static int sohci_free_dev (struct usb_device * usb_dev)
{
unsigned long flags;
int i, cnt = 0;
ed_t * ed;
struct ohci_device * dev = usb_to_ohci (usb_dev);
ohci_t * ohci = usb_dev->bus->hcpriv;
if (!dev)
return 0;
if (usb_dev->devnum >= 0) {
/* driver disconnects should have unlinked all urbs
* (freeing all the TDs, unlinking EDs) but we need
* to defend against bugs that prevent that.
*/
spin_lock_irqsave (&usb_ed_lock, flags);
for(i = 0; i < NUM_EDS; i++) {
ed = &(dev->ed[i]);
if (ed->state != ED_NEW) {
if (ed->state == ED_OPER) {
/* driver on that interface didn't unlink an urb */
dbg ("driver usb-%s dev %d ed 0x%x unfreed URB",
ohci->slot_name, usb_dev->devnum, i);
ep_unlink (ohci, ed);
}
ep_rm_ed (usb_dev, ed);
ed->state = ED_DEL;
cnt++;
}
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
/* if the controller is running, tds for those unlinked
* urbs get freed by dl_del_list at the next SF interrupt
*/
if (cnt > 0) {
if (ohci->disabled) {
/* FIXME: Something like this should kick in,
* though it's currently an exotic case ...
* the controller won't ever be touching
* these lists again!!
dl_del_list (ohci,
le16_to_cpu (ohci->hcca->frame_no) & 1);
*/
warn ("TD leak, %d", cnt);
} else if (!in_interrupt ()) {
DECLARE_WAIT_QUEUE_HEAD (freedev_wakeup);
DECLARE_WAITQUEUE (wait, current);
int timeout = OHCI_UNLINK_TIMEOUT;
/* SF interrupt handler calls dl_del_list */
add_wait_queue (&freedev_wakeup, &wait);
dev->wait = &freedev_wakeup;
set_current_state(TASK_UNINTERRUPTIBLE);
while (timeout && dev->ed_cnt)
timeout = schedule_timeout (timeout);
set_current_state(TASK_RUNNING);
remove_wait_queue (&freedev_wakeup, &wait);
if (dev->ed_cnt) {
err ("free device %d timeout", usb_dev->devnum);
return -ETIMEDOUT;
}
} else {
/* likely some interface's driver has a refcount bug */
err ("bus %s devnum %d deletion in interrupt",
ohci->slot_name, usb_dev->devnum);
BUG ();
}
}
}
/* free device, and associated EDs */
dev_free (ohci, dev);
return 0;
}
/*-------------------------------------------------------------------------*/
/* tell us the current USB frame number */
static int sohci_get_current_frame_number (struct usb_device *usb_dev)
{
ohci_t * ohci = usb_dev->bus->hcpriv;
return le16_to_cpu (ohci->hcca->frame_no);
}
/*-------------------------------------------------------------------------*/
struct usb_operations sohci_device_operations = {
allocate: sohci_alloc_dev,
deallocate: sohci_free_dev,
get_frame_number: sohci_get_current_frame_number,
submit_urb: sohci_submit_urb,
unlink_urb: sohci_unlink_urb,
};
/*-------------------------------------------------------------------------*
* ED handling functions
*-------------------------------------------------------------------------*/
/* search for the right branch to insert an interrupt ed into the int tree
* do some load ballancing;
* returns the branch and
* sets the interval to interval = 2^integer (ld (interval)) */
static int ep_int_ballance (ohci_t * ohci, int interval, int load)
{
int i, branch = 0;
/* search for the least loaded interrupt endpoint branch of all 32 branches */
for (i = 0; i < 32; i++)
if (ohci->ohci_int_load [branch] > ohci->ohci_int_load [i]) branch = i;
branch = branch % interval;
for (i = branch; i < 32; i += interval) ohci->ohci_int_load [i] += load;
return branch;
}
/*-------------------------------------------------------------------------*/
/* 2^int( ld (inter)) */
static int ep_2_n_interval (int inter)
{
int i;
for (i = 0; ((inter >> i) > 1 ) && (i < 5); i++);
return 1 << i;
}
/*-------------------------------------------------------------------------*/
/* the int tree is a binary tree
* in order to process it sequentially the indexes of the branches have to be mapped
* the mapping reverses the bits of a word of num_bits length */
static int ep_rev (int num_bits, int word)
{
int i, wout = 0;
for (i = 0; i < num_bits; i++) wout |= (((word >> i) & 1) << (num_bits - i - 1));
return wout;
}
/*-------------------------------------------------------------------------*/
/* link an ed into one of the HC chains */
static int ep_link (ohci_t * ohci, ed_t * edi)
{
int int_branch;
int i;
int inter;
int interval;
int load;
__u32 * ed_p;
volatile ed_t * ed = edi;
ed->state = ED_OPER;
switch (ed->type) {
case PIPE_CONTROL:
ed->hwNextED = 0;
if (ohci->ed_controltail == NULL) {
writel (ed->dma, &ohci->regs->ed_controlhead);
} else {
ohci->ed_controltail->hwNextED = cpu_to_le32 (ed->dma);
}
ed->ed_prev = ohci->ed_controltail;
if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
!ohci->ed_rm_list[1] && !ohci->sleeping) {
ohci->hc_control |= OHCI_CTRL_CLE;
writel (ohci->hc_control, &ohci->regs->control);
}
ohci->ed_controltail = edi;
break;
case PIPE_BULK:
ed->hwNextED = 0;
if (ohci->ed_bulktail == NULL) {
writel (ed->dma, &ohci->regs->ed_bulkhead);
} else {
ohci->ed_bulktail->hwNextED = cpu_to_le32 (ed->dma);
}
ed->ed_prev = ohci->ed_bulktail;
if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
!ohci->ed_rm_list[1] && !ohci->sleeping) {
ohci->hc_control |= OHCI_CTRL_BLE;
writel (ohci->hc_control, &ohci->regs->control);
}
ohci->ed_bulktail = edi;
break;
case PIPE_INTERRUPT:
load = ed->int_load;
interval = ep_2_n_interval (ed->int_period);
ed->int_interval = interval;
int_branch = ep_int_ballance (ohci, interval, load);
ed->int_branch = int_branch;
for (i = 0; i < ep_rev (6, interval); i += inter) {
inter = 1;
for (ed_p = &(ohci->hcca->int_table[ep_rev (5, i) + int_branch]);
(*ed_p != 0) && ((dma_to_ed (ohci, le32_to_cpup (ed_p)))->int_interval >= interval);
ed_p = &((dma_to_ed (ohci, le32_to_cpup (ed_p)))->hwNextED))
inter = ep_rev (6, (dma_to_ed (ohci, le32_to_cpup (ed_p)))->int_interval);
ed->hwNextED = *ed_p;
*ed_p = cpu_to_le32 (ed->dma);
}
#ifdef DEBUG
ep_print_int_eds (ohci, "LINK_INT");
#endif
break;
case PIPE_ISOCHRONOUS:
ed->hwNextED = 0;
ed->int_interval = 1;
if (ohci->ed_isotail != NULL) {
ohci->ed_isotail->hwNextED = cpu_to_le32 (ed->dma);
ed->ed_prev = ohci->ed_isotail;
} else {
for ( i = 0; i < 32; i += inter) {
inter = 1;
for (ed_p = &(ohci->hcca->int_table[ep_rev (5, i)]);
*ed_p != 0;
ed_p = &((dma_to_ed (ohci, le32_to_cpup (ed_p)))->hwNextED))
inter = ep_rev (6, (dma_to_ed (ohci, le32_to_cpup (ed_p)))->int_interval);
*ed_p = cpu_to_le32 (ed->dma);
}
ed->ed_prev = NULL;
}
ohci->ed_isotail = edi;
#ifdef DEBUG
ep_print_int_eds (ohci, "LINK_ISO");
#endif
break;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* scan the periodic table to find and unlink this ED */
static void periodic_unlink (
struct ohci *ohci,
struct ed *ed,
unsigned index,
unsigned period
) {
for (; index < NUM_INTS; index += period) {
__u32 *ed_p = &ohci->hcca->int_table [index];
/* ED might have been unlinked through another path */
while (*ed_p != 0) {
if ((dma_to_ed (ohci, le32_to_cpup (ed_p))) == ed) {
*ed_p = ed->hwNextED;
break;
}
ed_p = & ((dma_to_ed (ohci,
le32_to_cpup (ed_p)))->hwNextED);
}
}
}
/* unlink an ed from one of the HC chains.
* just the link to the ed is unlinked.
* the link from the ed still points to another operational ed or 0
* so the HC can eventually finish the processing of the unlinked ed */
static int ep_unlink (ohci_t * ohci, ed_t * ed)
{
int i;
ed->hwINFO |= cpu_to_le32 (OHCI_ED_SKIP);
switch (ed->type) {
case PIPE_CONTROL:
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_CLE;
writel (ohci->hc_control, &ohci->regs->control);
}
writel (le32_to_cpup (&ed->hwNextED), &ohci->regs->ed_controlhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
}
if (ohci->ed_controltail == ed) {
ohci->ed_controltail = ed->ed_prev;
} else {
(dma_to_ed (ohci, le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev;
}
break;
case PIPE_BULK:
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_BLE;
writel (ohci->hc_control, &ohci->regs->control);
}
writel (le32_to_cpup (&ed->hwNextED), &ohci->regs->ed_bulkhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
}
if (ohci->ed_bulktail == ed) {
ohci->ed_bulktail = ed->ed_prev;
} else {
(dma_to_ed (ohci, le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev;
}
break;
case PIPE_INTERRUPT:
periodic_unlink (ohci, ed, 0, 1);
for (i = ed->int_branch; i < 32; i += ed->int_interval)
ohci->ohci_int_load[i] -= ed->int_load;
#ifdef DEBUG
ep_print_int_eds (ohci, "UNLINK_INT");
#endif
break;
case PIPE_ISOCHRONOUS:
if (ohci->ed_isotail == ed)
ohci->ed_isotail = ed->ed_prev;
if (ed->hwNextED != 0)
(dma_to_ed (ohci, le32_to_cpup (&ed->hwNextED)))
->ed_prev = ed->ed_prev;
if (ed->ed_prev != NULL)
ed->ed_prev->hwNextED = ed->hwNextED;
else
periodic_unlink (ohci, ed, 0, 1);
#ifdef DEBUG
ep_print_int_eds (ohci, "UNLINK_ISO");
#endif
break;
}
ed->state = ED_UNLINK;
return 0;
}
/*-------------------------------------------------------------------------*/
/* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
* but the USB stack is a little bit stateless so we do it at every transaction
* if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
* in all other cases the state is left unchanged
* the ed info fields are setted anyway even though most of them should not change */
static ed_t * ep_add_ed (
struct usb_device * usb_dev,
unsigned int pipe,
int interval,
int load,
int mem_flags
)
{
ohci_t * ohci = usb_dev->bus->hcpriv;
td_t * td;
ed_t * ed_ret;
volatile ed_t * ed;
unsigned long flags;
spin_lock_irqsave (&usb_ed_lock, flags);
ed = ed_ret = &(usb_to_ohci (usb_dev)->ed[(usb_pipeendpoint (pipe) << 1) |
(usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))]);
if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
/* pending delete request */
spin_unlock_irqrestore (&usb_ed_lock, flags);
return NULL;
}
if (ed->state == ED_NEW) {
ed->hwINFO = cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
/* dummy td; end of td list for ed */
td = td_alloc (ohci, SLAB_ATOMIC);
/* hash the ed for later reverse mapping */
if (!td || !hash_add_ed (ohci, (ed_t *)ed)) {
/* out of memory */
if (td)
td_free(ohci, td);
spin_unlock_irqrestore (&usb_ed_lock, flags);
return NULL;
}
ed->hwTailP = cpu_to_le32 (td->td_dma);
ed->hwHeadP = ed->hwTailP;
ed->state = ED_UNLINK;
ed->type = usb_pipetype (pipe);
usb_to_ohci (usb_dev)->ed_cnt++;
}
ohci->dev[usb_pipedevice (pipe)] = usb_dev;
ed->hwINFO = cpu_to_le32 (usb_pipedevice (pipe)
| usb_pipeendpoint (pipe) << 7
| (usb_pipeisoc (pipe)? 0x8000: 0)
| (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
| (usb_dev->speed == USB_SPEED_LOW) << 13
| usb_maxpacket (usb_dev, pipe, usb_pipeout (pipe)) << 16);
if (ed->type == PIPE_INTERRUPT && ed->state == ED_UNLINK) {
ed->int_period = interval;
ed->int_load = load;
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
return ed_ret;
}
/*-------------------------------------------------------------------------*/
/* request the removal of an endpoint
* put the ep on the rm_list and request a stop of the bulk or ctrl list
* real removal is done at the next start frame (SF) hardware interrupt */
static void ep_rm_ed (struct usb_device * usb_dev, ed_t * ed)
{
unsigned int frame;
ohci_t * ohci = usb_dev->bus->hcpriv;
if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL))
return;
ed->hwINFO |= cpu_to_le32 (OHCI_ED_SKIP);
if (!ohci->disabled) {
switch (ed->type) {
case PIPE_CONTROL: /* stop control list */
ohci->hc_control &= ~OHCI_CTRL_CLE;
writel (ohci->hc_control, &ohci->regs->control);
break;
case PIPE_BULK: /* stop bulk list */
ohci->hc_control &= ~OHCI_CTRL_BLE;
writel (ohci->hc_control, &ohci->regs->control);
break;
}
}
frame = le16_to_cpu (ohci->hcca->frame_no) & 0x1;
ed->ed_rm_list = ohci->ed_rm_list[frame];
ohci->ed_rm_list[frame] = ed;
if (!ohci->disabled && !ohci->sleeping) {
/* enable SOF interrupt */
writel (OHCI_INTR_SF, &ohci->regs->intrstatus);
writel (OHCI_INTR_SF, &ohci->regs->intrenable);
}
}
/*-------------------------------------------------------------------------*
* TD handling functions
*-------------------------------------------------------------------------*/
/* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
static void
td_fill (ohci_t * ohci, unsigned int info,
dma_addr_t data, int len,
struct urb * urb, int index)
{
volatile td_t * td, * td_pt;
urb_priv_t * urb_priv = urb->hcpriv;
if (index >= urb_priv->length) {
err("internal OHCI error: TD index > length");
return;
}
/* use this td as the next dummy */
td_pt = urb_priv->td [index];
td_pt->hwNextTD = 0;
/* fill the old dummy TD */
td = urb_priv->td [index] = dma_to_td (ohci,
le32_to_cpup (&urb_priv->ed->hwTailP) & ~0xf);
td->ed = urb_priv->ed;
td->next_dl_td = NULL;
td->index = index;
td->urb = urb;
td->data_dma = data;
if (!len)
data = 0;
td->hwINFO = cpu_to_le32 (info);
if ((td->ed->type) == PIPE_ISOCHRONOUS) {
td->hwCBP = cpu_to_le32 (data & 0xFFFFF000);
td->ed->last_iso = info & 0xffff;
} else {
td->hwCBP = cpu_to_le32 (data);
}
if (data)
td->hwBE = cpu_to_le32 (data + len - 1);
else
td->hwBE = 0;
td->hwNextTD = cpu_to_le32 (td_pt->td_dma);
td->hwPSW [0] = cpu_to_le16 ((data & 0x0FFF) | 0xE000);
/* append to queue */
td->ed->hwTailP = td->hwNextTD;
}
/*-------------------------------------------------------------------------*/
/* prepare all TDs of a transfer */
static void td_submit_urb (struct urb * urb)
{
urb_priv_t * urb_priv = urb->hcpriv;
ohci_t * ohci = (ohci_t *) urb->dev->bus->hcpriv;
dma_addr_t data;
int data_len = urb->transfer_buffer_length;
int maxps = usb_maxpacket (urb->dev, urb->pipe, usb_pipeout (urb->pipe));
int cnt = 0;
__u32 info = 0;
unsigned int toggle = 0;
/* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
if(usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe))) {
toggle = TD_T_TOGGLE;
} else {
toggle = TD_T_DATA0;
usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe), 1);
}
urb_priv->td_cnt = 0;
if (data_len) {
data = pci_map_single (ohci->ohci_dev,
urb->transfer_buffer, data_len,
usb_pipeout (urb->pipe)
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE
);
} else
data = 0;
switch (usb_pipetype (urb->pipe)) {
case PIPE_BULK:
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
while(data_len > 4096) {
td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, urb, cnt);
data += 4096; data_len -= 4096; cnt++;
}
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, urb, cnt);
cnt++;
/* If the transfer size is multiple of the pipe mtu,
* we may need an extra TD to create a empty frame
* Note : another way to check this condition is
* to test if(urb_priv->length > cnt) - Jean II */
if ((urb->transfer_flags & USB_ZERO_PACKET) &&
usb_pipeout (urb->pipe) &&
(urb->transfer_buffer_length != 0) &&
((urb->transfer_buffer_length % maxps) == 0)) {
td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), 0, 0, urb, cnt);
cnt++;
}
if (!ohci->sleeping)
writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
break;
case PIPE_INTERRUPT:
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_OUT | toggle: TD_CC | TD_R | TD_DP_IN | toggle;
td_fill (ohci, info, data, data_len, urb, cnt++);
break;
case PIPE_CONTROL:
info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
td_fill (ohci, info,
pci_map_single (ohci->ohci_dev,
urb->setup_packet, 8,
PCI_DMA_TODEVICE),
8, urb, cnt++);
if (data_len > 0) {
info = usb_pipeout (urb->pipe)?
TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
/* NOTE: mishandles transfers >8K, some >4K */
td_fill (ohci, info, data, data_len, urb, cnt++);
}
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
td_fill (ohci, info, data, 0, urb, cnt++);
if (!ohci->sleeping)
writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
break;
case PIPE_ISOCHRONOUS:
for (cnt = 0; cnt < urb->number_of_packets; cnt++) {
td_fill (ohci, TD_CC|TD_ISO | ((urb->start_frame + cnt) & 0xffff),
data + urb->iso_frame_desc[cnt].offset,
urb->iso_frame_desc[cnt].length, urb, cnt);
}
break;
}
if (urb_priv->length != cnt)
dbg("TD LENGTH %d != CNT %d", urb_priv->length, cnt);
}
/*-------------------------------------------------------------------------*
* Done List handling functions
*-------------------------------------------------------------------------*/
/* calculate the transfer length and update the urb */
static void dl_transfer_length(td_t * td)
{
__u32 tdINFO, tdBE, tdCBP;
__u16 tdPSW;
struct urb * urb = td->urb;
urb_priv_t * urb_priv = urb->hcpriv;
int dlen = 0;
int cc = 0;
tdINFO = le32_to_cpup (&td->hwINFO);
tdBE = le32_to_cpup (&td->hwBE);
tdCBP = le32_to_cpup (&td->hwCBP);
if (tdINFO & TD_ISO) {
tdPSW = le16_to_cpu (td->hwPSW[0]);
cc = (tdPSW >> 12) & 0xF;
if (cc < 0xE) {
if (usb_pipeout(urb->pipe)) {
dlen = urb->iso_frame_desc[td->index].length;
} else {
dlen = tdPSW & 0x3ff;
}
urb->actual_length += dlen;
urb->iso_frame_desc[td->index].actual_length = dlen;
if (!(urb->transfer_flags & USB_DISABLE_SPD) && (cc == TD_DATAUNDERRUN))
cc = TD_CC_NOERROR;
urb->iso_frame_desc[td->index].status = cc_to_error[cc];
}
} else { /* BULK, INT, CONTROL DATA */
if (!(usb_pipetype (urb->pipe) == PIPE_CONTROL &&
((td->index == 0) || (td->index == urb_priv->length - 1)))) {
if (tdBE != 0) {
if (td->hwCBP == 0)
urb->actual_length += tdBE - td->data_dma + 1;
else
urb->actual_length += tdCBP - td->data_dma;
}
}
}
}
/* handle an urb that is being unlinked */
static void dl_del_urb (struct urb * urb)
{
wait_queue_head_t * wait_head = ((urb_priv_t *)(urb->hcpriv))->wait;
urb_rm_priv_locked (urb);
if (urb->transfer_flags & USB_ASYNC_UNLINK) {
urb->status = -ECONNRESET;
if (urb->complete)
urb->complete (urb);
} else {
urb->status = -ENOENT;
/* unblock sohci_unlink_urb */
if (wait_head)
wake_up (wait_head);
}
}
/*-------------------------------------------------------------------------*/
/* replies to the request have to be on a FIFO basis so
* we reverse the reversed done-list */
td_t * dl_reverse_done_list (ohci_t * ohci)
{
__u32 td_list_hc;
td_t * td_rev = NULL;
td_t * td_list = NULL;
urb_priv_t * urb_priv = NULL;
unsigned long flags;
spin_lock_irqsave (&usb_ed_lock, flags);
td_list_hc = le32_to_cpup (&ohci->hcca->done_head) & 0xfffffff0;
ohci->hcca->done_head = 0;
while (td_list_hc) {
td_list = dma_to_td (ohci, td_list_hc);
if (TD_CC_GET (le32_to_cpup (&td_list->hwINFO))) {
urb_priv = (urb_priv_t *) td_list->urb->hcpriv;
dbg(" USB-error/status: %x : %p",
TD_CC_GET (le32_to_cpup (&td_list->hwINFO)), td_list);
if (td_list->ed->hwHeadP & cpu_to_le32 (0x1)) {
if (urb_priv && ((td_list->index + 1) < urb_priv->length)) {
td_list->ed->hwHeadP =
(urb_priv->td[urb_priv->length - 1]->hwNextTD & cpu_to_le32 (0xfffffff0)) |
(td_list->ed->hwHeadP & cpu_to_le32 (0x2));
urb_priv->td_cnt += urb_priv->length - td_list->index - 1;
} else
td_list->ed->hwHeadP &= cpu_to_le32 (0xfffffff2);
}
}
td_list->next_dl_td = td_rev;
td_rev = td_list;
td_list_hc = le32_to_cpup (&td_list->hwNextTD) & 0xfffffff0;
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
return td_list;
}
/*-------------------------------------------------------------------------*/
/* there are some pending requests to remove
* - some of the eds (if ed->state & ED_DEL (set by sohci_free_dev)
* - some URBs/TDs if urb_priv->state == URB_DEL */
static void dl_del_list (ohci_t * ohci, unsigned int frame)
{
unsigned long flags;
ed_t * ed;
__u32 edINFO;
__u32 tdINFO;
td_t * td = NULL, * td_next = NULL, * tdHeadP = NULL, * tdTailP;
__u32 * td_p;
int ctrl = 0, bulk = 0;
spin_lock_irqsave (&usb_ed_lock, flags);
for (ed = ohci->ed_rm_list[frame]; ed != NULL; ed = ed->ed_rm_list) {
tdTailP = dma_to_td (ohci, le32_to_cpup (&ed->hwTailP) & 0xfffffff0);
tdHeadP = dma_to_td (ohci, le32_to_cpup (&ed->hwHeadP) & 0xfffffff0);
edINFO = le32_to_cpup (&ed->hwINFO);
td_p = &ed->hwHeadP;
for (td = tdHeadP; td != tdTailP; td = td_next) {
struct urb * urb = td->urb;
urb_priv_t * urb_priv = td->urb->hcpriv;
td_next = dma_to_td (ohci, le32_to_cpup (&td->hwNextTD) & 0xfffffff0);
if ((urb_priv->state == URB_DEL) || (ed->state & ED_DEL)) {
tdINFO = le32_to_cpup (&td->hwINFO);
if (TD_CC_GET (tdINFO) < 0xE)
dl_transfer_length (td);
*td_p = td->hwNextTD | (*td_p & cpu_to_le32 (0x3));
/* URB is done; clean up */
if (++(urb_priv->td_cnt) == urb_priv->length)
dl_del_urb (urb);
} else {
td_p = &td->hwNextTD;
}
}
if (ed->state & ED_DEL) { /* set by sohci_free_dev */
struct ohci_device * dev = usb_to_ohci (ohci->dev[edINFO & 0x7F]);
td_free (ohci, tdTailP); /* free dummy td */
ed->hwINFO = cpu_to_le32 (OHCI_ED_SKIP);
ed->state = ED_NEW;
hash_free_ed(ohci, ed);
/* if all eds are removed wake up sohci_free_dev */
if (!--dev->ed_cnt) {
wait_queue_head_t *wait_head = dev->wait;
dev->wait = 0;
if (wait_head)
wake_up (wait_head);
}
} else {
ed->state &= ~ED_URB_DEL;
tdHeadP = dma_to_td (ohci, le32_to_cpup (&ed->hwHeadP) & 0xfffffff0);
if (tdHeadP == tdTailP) {
if (ed->state == ED_OPER)
ep_unlink(ohci, ed);
td_free (ohci, tdTailP);
ed->hwINFO = cpu_to_le32 (OHCI_ED_SKIP);
ed->state = ED_NEW;
hash_free_ed(ohci, ed);
--(usb_to_ohci (ohci->dev[edINFO & 0x7F]))->ed_cnt;
} else
ed->hwINFO &= ~cpu_to_le32 (OHCI_ED_SKIP);
}
switch (ed->type) {
case PIPE_CONTROL:
ctrl = 1;
break;
case PIPE_BULK:
bulk = 1;
break;
}
}
/* maybe reenable control and bulk lists */
if (!ohci->disabled) {
if (ctrl) /* reset control list */
writel (0, &ohci->regs->ed_controlcurrent);
if (bulk) /* reset bulk list */
writel (0, &ohci->regs->ed_bulkcurrent);
if (!ohci->ed_rm_list[!frame] && !ohci->sleeping) {
if (ohci->ed_controltail)
ohci->hc_control |= OHCI_CTRL_CLE;
if (ohci->ed_bulktail)
ohci->hc_control |= OHCI_CTRL_BLE;
writel (ohci->hc_control, &ohci->regs->control);
}
}
ohci->ed_rm_list[frame] = NULL;
spin_unlock_irqrestore (&usb_ed_lock, flags);
}
/*-------------------------------------------------------------------------*/
/* td done list */
void dl_done_list (ohci_t * ohci, td_t * td_list)
{
td_t * td_list_next = NULL;
ed_t * ed;
int cc = 0;
struct urb * urb;
urb_priv_t * urb_priv;
__u32 tdINFO, edHeadP, edTailP;
unsigned long flags;
while (td_list) {
td_list_next = td_list->next_dl_td;
urb = td_list->urb;
urb_priv = urb->hcpriv;
tdINFO = le32_to_cpup (&td_list->hwINFO);
ed = td_list->ed;
dl_transfer_length(td_list);
/* error code of transfer */
cc = TD_CC_GET (tdINFO);
if (cc == TD_CC_STALL)
usb_endpoint_halt(urb->dev,
usb_pipeendpoint(urb->pipe),
usb_pipeout(urb->pipe));
if (!(urb->transfer_flags & USB_DISABLE_SPD)
&& (cc == TD_DATAUNDERRUN))
cc = TD_CC_NOERROR;
if (++(urb_priv->td_cnt) == urb_priv->length) {
if ((ed->state & (ED_OPER | ED_UNLINK))
&& (urb_priv->state != URB_DEL)) {
urb->status = cc_to_error[cc];
sohci_return_urb (ohci, urb);
} else {
spin_lock_irqsave (&usb_ed_lock, flags);
dl_del_urb (urb);
spin_unlock_irqrestore (&usb_ed_lock, flags);
}
}
spin_lock_irqsave (&usb_ed_lock, flags);
if (ed->state != ED_NEW) {
edHeadP = le32_to_cpup (&ed->hwHeadP) & 0xfffffff0;
edTailP = le32_to_cpup (&ed->hwTailP);
/* unlink eds if they are not busy */
if ((edHeadP == edTailP) && (ed->state == ED_OPER))
ep_unlink (ohci, ed);
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
td_list = td_list_next;
}
}
/*-------------------------------------------------------------------------*
* Virtual Root Hub
*-------------------------------------------------------------------------*/
/* Device descriptor */
static __u8 root_hub_dev_des[] =
{
0x12, /* __u8 bLength; */
0x01, /* __u8 bDescriptorType; Device */
0x10, /* __u16 bcdUSB; v1.1 */
0x01,
0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
0x00, /* __u8 bDeviceSubClass; */
0x00, /* __u8 bDeviceProtocol; */
0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
0x00, /* __u16 idVendor; */
0x00,
0x00, /* __u16 idProduct; */
0x00,
0x00, /* __u16 bcdDevice; */
0x00,
0x00, /* __u8 iManufacturer; */
0x02, /* __u8 iProduct; */
0x01, /* __u8 iSerialNumber; */
0x01 /* __u8 bNumConfigurations; */
};
/* Configuration descriptor */
static __u8 root_hub_config_des[] =
{
0x09, /* __u8 bLength; */
0x02, /* __u8 bDescriptorType; Configuration */
0x19, /* __u16 wTotalLength; */
0x00,
0x01, /* __u8 bNumInterfaces; */
0x01, /* __u8 bConfigurationValue; */
0x00, /* __u8 iConfiguration; */
0x40, /* __u8 bmAttributes;
Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
0x00, /* __u8 MaxPower; */
/* interface */
0x09, /* __u8 if_bLength; */
0x04, /* __u8 if_bDescriptorType; Interface */
0x00, /* __u8 if_bInterfaceNumber; */
0x00, /* __u8 if_bAlternateSetting; */
0x01, /* __u8 if_bNumEndpoints; */
0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
0x00, /* __u8 if_bInterfaceSubClass; */
0x00, /* __u8 if_bInterfaceProtocol; */
0x00, /* __u8 if_iInterface; */
/* endpoint */
0x07, /* __u8 ep_bLength; */
0x05, /* __u8 ep_bDescriptorType; Endpoint */
0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
0x03, /* __u8 ep_bmAttributes; Interrupt */
0x02, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
0x00,
0xff /* __u8 ep_bInterval; 255 ms */
};
/* Hub class-specific descriptor is constructed dynamically */
/*-------------------------------------------------------------------------*/
/* prepare Interrupt pipe data; HUB INTERRUPT ENDPOINT */
static int rh_send_irq (ohci_t * ohci, void * rh_data, int rh_len)
{
int num_ports;
int i;
int ret;
int len;
__u8 data[8];
num_ports = roothub_a (ohci) & RH_A_NDP;
if (num_ports > MAX_ROOT_PORTS) {
err ("bogus NDP=%d for OHCI usb-%s", num_ports,
ohci->slot_name);
err ("rereads as NDP=%d",
readl (&ohci->regs->roothub.a) & RH_A_NDP);
/* retry later; "should not happen" */
return 0;
}
*(__u8 *) data = (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC))
? 1: 0;
ret = *(__u8 *) data;
for ( i = 0; i < num_ports; i++) {
*(__u8 *) (data + (i + 1) / 8) |=
((roothub_portstatus (ohci, i) &
(RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC | RH_PS_OCIC | RH_PS_PRSC))
? 1: 0) << ((i + 1) % 8);
ret += *(__u8 *) (data + (i + 1) / 8);
}
len = i/8 + 1;
if (ret > 0) {
memcpy(rh_data, data,
min_t(unsigned int, len,
min_t(unsigned int, rh_len, sizeof(data))));
return len;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* Virtual Root Hub INTs are polled by this timer every "interval" ms */
static void rh_int_timer_do (unsigned long ptr)
{
int len;
struct urb * urb = (struct urb *) ptr;
ohci_t * ohci = urb->dev->bus->hcpriv;
if (ohci->disabled)
return;
/* ignore timers firing during PM suspend, etc */
if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER)
goto out;
if(ohci->rh.send) {
len = rh_send_irq (ohci, urb->transfer_buffer, urb->transfer_buffer_length);
if (len > 0) {
urb->actual_length = len;
#ifdef DEBUG
urb_print (urb, "RET-t(rh)", usb_pipeout (urb->pipe));
#endif
if (urb->complete)
urb->complete (urb);
}
}
out:
rh_init_int_timer (urb);
}
/*-------------------------------------------------------------------------*/
/* Root Hub INTs are polled by this timer */
static int rh_init_int_timer (struct urb * urb)
{
ohci_t * ohci = urb->dev->bus->hcpriv;
ohci->rh.interval = urb->interval;
init_timer (&ohci->rh.rh_int_timer);
ohci->rh.rh_int_timer.function = rh_int_timer_do;
ohci->rh.rh_int_timer.data = (unsigned long) urb;
ohci->rh.rh_int_timer.expires =
jiffies + (HZ * (urb->interval < 30? 30: urb->interval)) / 1000;
add_timer (&ohci->rh.rh_int_timer);
return 0;
}
/*-------------------------------------------------------------------------*/
#define OK(x) len = (x); break
#define WR_RH_STAT(x) writel((x), &ohci->regs->roothub.status)
#define WR_RH_PORTSTAT(x) writel((x), &ohci->regs->roothub.portstatus[wIndex-1])
#define RD_RH_STAT roothub_status(ohci)
#define RD_RH_PORTSTAT roothub_portstatus(ohci,wIndex-1)
/* request to virtual root hub */
static int rh_submit_urb (struct urb * urb)
{
struct usb_device * usb_dev = urb->dev;
ohci_t * ohci = usb_dev->bus->hcpriv;
unsigned int pipe = urb->pipe;
struct usb_ctrlrequest * cmd = (struct usb_ctrlrequest *) urb->setup_packet;
void * data = urb->transfer_buffer;
int leni = urb->transfer_buffer_length;
int len = 0;
int status = TD_CC_NOERROR;
__u32 datab[4];
__u8 * data_buf = (__u8 *) datab;
__u16 bmRType_bReq;
__u16 wValue;
__u16 wIndex;
__u16 wLength;
if (usb_pipeint(pipe)) {
ohci->rh.urb = urb;
ohci->rh.send = 1;
ohci->rh.interval = urb->interval;
rh_init_int_timer(urb);
urb->status = cc_to_error [TD_CC_NOERROR];
return 0;
}
bmRType_bReq = cmd->bRequestType | (cmd->bRequest << 8);
wValue = le16_to_cpu (cmd->wValue);
wIndex = le16_to_cpu (cmd->wIndex);
wLength = le16_to_cpu (cmd->wLength);
switch (bmRType_bReq) {
/* Request Destination:
without flags: Device,
RH_INTERFACE: interface,
RH_ENDPOINT: endpoint,
RH_CLASS means HUB here,
RH_OTHER | RH_CLASS almost ever means HUB_PORT here
*/
case RH_GET_STATUS:
*(__u16 *) data_buf = cpu_to_le16 (1); OK (2);
case RH_GET_STATUS | RH_INTERFACE:
*(__u16 *) data_buf = cpu_to_le16 (0); OK (2);
case RH_GET_STATUS | RH_ENDPOINT:
*(__u16 *) data_buf = cpu_to_le16 (0); OK (2);
case RH_GET_STATUS | RH_CLASS:
*(__u32 *) data_buf = cpu_to_le32 (
RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
OK (4);
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
*(__u32 *) data_buf = cpu_to_le32 (RD_RH_PORTSTAT); OK (4);
case RH_CLEAR_FEATURE | RH_ENDPOINT:
switch (wValue) {
case (RH_ENDPOINT_STALL): OK (0);
}
break;
case RH_CLEAR_FEATURE | RH_CLASS:
switch (wValue) {
case RH_C_HUB_LOCAL_POWER:
OK(0);
case (RH_C_HUB_OVER_CURRENT):
WR_RH_STAT(RH_HS_OCIC); OK (0);
}
break;
case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_ENABLE):
WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
case (RH_PORT_SUSPEND):
WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
case (RH_PORT_POWER):
WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
case (RH_C_PORT_CONNECTION):
WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
case (RH_C_PORT_ENABLE):
WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
case (RH_C_PORT_SUSPEND):
WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
case (RH_C_PORT_OVER_CURRENT):
WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
case (RH_C_PORT_RESET):
WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
}
break;
case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_SUSPEND):
WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
if (RD_RH_PORTSTAT & RH_PS_CCS)
WR_RH_PORTSTAT (RH_PS_PRS);
OK (0);
case (RH_PORT_POWER):
WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
if (RD_RH_PORTSTAT & RH_PS_CCS)
WR_RH_PORTSTAT (RH_PS_PES );
OK (0);
}
break;
case RH_SET_ADDRESS: ohci->rh.devnum = wValue; OK(0);
case RH_GET_DESCRIPTOR:
switch ((wValue & 0xff00) >> 8) {
case (0x01): /* device descriptor */
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof (root_hub_dev_des),
wLength));
data_buf = root_hub_dev_des; OK(len);
case (0x02): /* configuration descriptor */
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof (root_hub_config_des),
wLength));
data_buf = root_hub_config_des; OK(len);
case (0x03): /* string descriptors */
len = usb_root_hub_string (wValue & 0xff,
(int)(long) ohci->regs, "OHCI",
data, wLength);
if (len > 0) {
data_buf = data;
OK(min_t(int, leni, len));
}
// else fallthrough
default:
status = TD_CC_STALL;
}
break;
case RH_GET_DESCRIPTOR | RH_CLASS:
{
__u32 temp = roothub_a (ohci);
data_buf [0] = 9; // min length;
data_buf [1] = 0x29;
data_buf [2] = temp & RH_A_NDP;
data_buf [3] = 0;
if (temp & RH_A_PSM) /* per-port power switching? */
data_buf [3] |= 0x1;
if (temp & RH_A_NOCP) /* no overcurrent reporting? */
data_buf [3] |= 0x10;
else if (temp & RH_A_OCPM) /* per-port overcurrent reporting? */
data_buf [3] |= 0x8;
datab [1] = 0;
data_buf [5] = (temp & RH_A_POTPGT) >> 24;
temp = roothub_b (ohci);
data_buf [7] = temp & RH_B_DR;
if (data_buf [2] < 7) {
data_buf [8] = 0xff;
} else {
data_buf [0] += 2;
data_buf [8] = (temp & RH_B_DR) >> 8;
data_buf [10] = data_buf [9] = 0xff;
}
len = min_t(unsigned int, leni,
min_t(unsigned int, data_buf [0], wLength));
OK (len);
}
case RH_GET_CONFIGURATION: *(__u8 *) data_buf = 0x01; OK (1);
case RH_SET_CONFIGURATION: WR_RH_STAT (0x10000); OK (0);
default:
dbg ("unsupported root hub command");
status = TD_CC_STALL;
}
#ifdef DEBUG
// ohci_dump_roothub (ohci, 0);
#endif
len = min_t(int, len, leni);
if (data != data_buf)
memcpy (data, data_buf, len);
urb->actual_length = len;
urb->status = cc_to_error [status];
#ifdef DEBUG
urb_print (urb, "RET(rh)", usb_pipeout (urb->pipe));
#endif
urb->hcpriv = NULL;
usb_put_dev (usb_dev);
urb->dev = NULL;
if (urb->complete)
urb->complete (urb);
usb_put_urb (urb);
return 0;
}
/*-------------------------------------------------------------------------*/
static int rh_unlink_urb (struct urb * urb)
{
ohci_t * ohci = urb->dev->bus->hcpriv;
if (ohci->rh.urb == urb) {
ohci->rh.send = 0;
del_timer (&ohci->rh.rh_int_timer);
ohci->rh.urb = NULL;
urb->hcpriv = NULL;
usb_put_dev (urb->dev);
urb->dev = NULL;
if (urb->transfer_flags & USB_ASYNC_UNLINK) {
urb->status = -ECONNRESET;
if (urb->complete)
urb->complete (urb);
} else
urb->status = -ENOENT;
usb_put_urb (urb);
}
return 0;
}
/*-------------------------------------------------------------------------*
* HC functions
*-------------------------------------------------------------------------*/
/* reset the HC and BUS */
int hc_reset (ohci_t * ohci)
{
int timeout = 30;
int smm_timeout = 50; /* 0,5 sec */
if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
dbg("USB HC TakeOver from SMM");
while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
wait_ms (10);
if (--smm_timeout == 0) {
err("USB HC TakeOver failed!");
return -1;
}
}
}
/* Disable HC interrupts */
writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
dbg("USB HC reset_hc usb-%s: ctrl = 0x%x ;",
ohci->slot_name,
readl (&ohci->regs->control));
/* Reset USB (needed by some controllers) */
writel (0, &ohci->regs->control);
/* HC Reset requires max 10 ms delay */
writel (OHCI_HCR, &ohci->regs->cmdstatus);
while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
if (--timeout == 0) {
err("USB HC reset timed out!");
return -1;
}
udelay (1);
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* Start an OHCI controller, set the BUS operational
* enable interrupts
* connect the virtual root hub */
int hc_start (ohci_t * ohci, struct device *parent_dev)
{
__u32 mask;
unsigned int fminterval;
struct usb_device * usb_dev;
struct ohci_device * dev;
ohci->disabled = 1;
/* Tell the controller where the control and bulk lists are
* The lists are empty now. */
writel (0, &ohci->regs->ed_controlhead);
writel (0, &ohci->regs->ed_bulkhead);
writel (ohci->hcca_dma, &ohci->regs->hcca); /* a reset clears this */
fminterval = 0x2edf;
writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
writel (fminterval, &ohci->regs->fminterval);
writel (0x628, &ohci->regs->lsthresh);
/* start controller operations */
ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
ohci->disabled = 0;
writel (ohci->hc_control, &ohci->regs->control);
/* Choose the interrupts we care about now, others later on demand */
mask = OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
writel (mask, &ohci->regs->intrenable);
writel (mask, &ohci->regs->intrstatus);
#ifdef OHCI_USE_NPS
/* required for AMD-756 and some Mac platforms */
writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
&ohci->regs->roothub.a);
writel (RH_HS_LPSC, &ohci->regs->roothub.status);
#endif /* OHCI_USE_NPS */
// POTPGT delay is bits 24-31, in 2 ms units.
mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
/* connect the virtual root hub */
ohci->rh.devnum = 0;
usb_dev = usb_alloc_dev (NULL, ohci->bus);
if (!usb_dev) {
ohci->disabled = 1;
return -ENOMEM;
}
dev = usb_to_ohci (usb_dev);
ohci->bus->root_hub = usb_dev;
usb_connect (usb_dev);
if (usb_register_root_hub (usb_dev, parent_dev) != 0) {
usb_free_dev (usb_dev);
ohci->disabled = 1;
return -ENODEV;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* called only from interrupt handler */
static void check_timeouts (struct ohci *ohci)
{
spin_lock (&usb_ed_lock);
while (!list_empty (&ohci->timeout_list)) {
struct urb *urb;
urb = list_entry (ohci->timeout_list.next, struct urb, urb_list);
if (time_after (jiffies, urb->timeout))
break;
list_del_init (&urb->urb_list);
if (urb->status != -EINPROGRESS)
continue;
urb->transfer_flags |= USB_TIMEOUT_KILLED | USB_ASYNC_UNLINK;
spin_unlock (&usb_ed_lock);
// outside the interrupt handler (in a timer...)
// this reference would race interrupts
sohci_unlink_urb (urb);
spin_lock (&usb_ed_lock);
}
spin_unlock (&usb_ed_lock);
}
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
static void hc_interrupt (int irq, void * __ohci, struct pt_regs * r)
{
ohci_t * ohci = __ohci;
struct ohci_regs * regs = ohci->regs;
int ints;
if ((ohci->hcca->done_head != 0) && !(le32_to_cpup (&ohci->hcca->done_head) & 0x01)) {
ints = OHCI_INTR_WDH;
} else if ((ints = (readl (&regs->intrstatus) & readl (&regs->intrenable))) == 0) {
return;
}
// dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no));
if (ints & OHCI_INTR_UE) {
ohci->disabled++;
err ("OHCI Unrecoverable Error, controller usb-%s disabled",
ohci->slot_name);
// e.g. due to PCI Master/Target Abort
#ifdef DEBUG
ohci_dump (ohci, 1);
#else
// FIXME: be optimistic, hope that bug won't repeat often.
// Make some non-interrupt context restart the controller.
// Count and limit the retries though; either hardware or
// software errors can go forever...
#endif
hc_reset (ohci);
}
if (ints & OHCI_INTR_WDH) {
writel (OHCI_INTR_WDH, &regs->intrdisable);
dl_done_list (ohci, dl_reverse_done_list (ohci));
writel (OHCI_INTR_WDH, &regs->intrenable);
}
if (ints & OHCI_INTR_SO) {
dbg("USB Schedule overrun");
writel (OHCI_INTR_SO, &regs->intrenable);
}
// FIXME: this assumes SOF (1/ms) interrupts don't get lost...
if (ints & OHCI_INTR_SF) {
unsigned int frame = le16_to_cpu (ohci->hcca->frame_no) & 1;
writel (OHCI_INTR_SF, &regs->intrdisable);
if (ohci->ed_rm_list[!frame] != NULL) {
dl_del_list (ohci, !frame);
}
if (ohci->ed_rm_list[frame] != NULL)
writel (OHCI_INTR_SF, &regs->intrenable);
}
if (!list_empty (&ohci->timeout_list)) {
check_timeouts (ohci);
// FIXME: enable SF as needed in a timer;
// don't make lots of 1ms interrupts
// On unloaded USB, think 4k ~= 4-5msec
if (!list_empty (&ohci->timeout_list))
writel (OHCI_INTR_SF, &regs->intrenable);
}
writel (ints, &regs->intrstatus);
writel (OHCI_INTR_MIE, &regs->intrenable);
}
/*-------------------------------------------------------------------------*/
/* allocate OHCI */
static ohci_t * __devinit hc_alloc_ohci (struct pci_dev *dev, void * mem_base)
{
ohci_t * ohci;
ohci = (ohci_t *) kmalloc (sizeof *ohci, GFP_KERNEL);
if (!ohci)
return NULL;
memset (ohci, 0, sizeof (ohci_t));
ohci->hcca = pci_alloc_consistent (dev, sizeof *ohci->hcca,
&ohci->hcca_dma);
if (!ohci->hcca) {
kfree (ohci);
return NULL;
}
memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
ohci->disabled = 1;
ohci->sleeping = 0;
ohci->irq = -1;
ohci->regs = mem_base;
ohci->ohci_dev = dev;
#ifdef CONFIG_PCI
pci_set_drvdata(dev, ohci);
#endif
INIT_LIST_HEAD (&ohci->ohci_hcd_list);
list_add (&ohci->ohci_hcd_list, &ohci_hcd_list);
INIT_LIST_HEAD (&ohci->timeout_list);
ohci->bus = usb_alloc_bus (&sohci_device_operations);
if (!ohci->bus) {
#ifdef CONFIG_PCI
pci_set_drvdata (dev, NULL);
#endif
pci_free_consistent (ohci->ohci_dev, sizeof *ohci->hcca,
ohci->hcca, ohci->hcca_dma);
kfree (ohci);
return NULL;
}
ohci->bus->hcpriv = (void *) ohci;
#ifdef CONFIG_PCI
ohci->bus->bus_name = dev->slot_name;
#else
ohci->bus->bus_name = "ohci-hc";
#endif
return ohci;
}
/*-------------------------------------------------------------------------*/
/* De-allocate all resources.. */
static void hc_release_ohci (ohci_t * ohci)
{
dbg ("USB HC release ohci usb-%s", ohci->slot_name);
/* disconnect all devices */
if (ohci->bus->root_hub)
usb_disconnect (&ohci->bus->root_hub);
if (!ohci->disabled)
hc_reset (ohci);
if (ohci->irq >= 0) {
free_irq (ohci->irq, ohci);
ohci->irq = -1;
}
#ifdef CONFIG_PCI
pci_set_drvdata(ohci->ohci_dev, NULL);
#endif
if (ohci->bus) {
if (ohci->bus->busnum)
usb_deregister_bus (ohci->bus);
usb_free_bus (ohci->bus);
}
list_del (&ohci->ohci_hcd_list);
INIT_LIST_HEAD (&ohci->ohci_hcd_list);
ohci_mem_cleanup (ohci);
pci_free_consistent (ohci->ohci_dev, sizeof *ohci->hcca,
ohci->hcca, ohci->hcca_dma);
kfree (ohci);
}
/*-------------------------------------------------------------------------*/
/*
* Host bus independent add one OHCI host controller.
*/
int
hc_add_ohci(struct pci_dev *dev, int irq, void *mem_base, unsigned long flags,
ohci_t **ohcip, const char *name, const char *slot_name)
{
char buf[8], *bufp = buf;
ohci_t * ohci;
int ret;
#ifndef __sparc__
sprintf(buf, "%d", irq);
#else
bufp = __irq_itoa(irq);
#endif
printk(KERN_INFO __FILE__ ": USB OHCI at membase 0x%lx, IRQ %s\n",
(unsigned long) mem_base, bufp);
ohci = hc_alloc_ohci (dev, mem_base);
if (!ohci) {
return -ENOMEM;
}
ohci->slot_name = slot_name;
if ((ret = ohci_mem_init (ohci)) < 0) {
hc_release_ohci (ohci);
return ret;
}
ohci->flags = flags;
if (ohci->flags & OHCI_QUIRK_AMD756)
printk (KERN_INFO __FILE__ ": AMD756 erratum 4 workaround\n");
if (hc_reset (ohci) < 0) {
hc_release_ohci (ohci);
return -ENODEV;
}
/* FIXME this is a second HC reset; why?? */
writel (ohci->hc_control = OHCI_USB_RESET, &ohci->regs->control);
wait_ms (10);
usb_register_bus (ohci->bus);
if (request_irq (irq, hc_interrupt, SA_SHIRQ, name, ohci) != 0) {
err ("request interrupt %s failed", bufp);
hc_release_ohci (ohci);
return -EBUSY;
}
ohci->irq = irq;
*ohcip = ohci;
return 0;
}
/*
* Host bus independent remove one OHCI host controller.
*/
void hc_remove_ohci(ohci_t *ohci)
{
#ifdef DEBUG
ohci_dump (ohci, 1);
#endif
/* don't wake up sleeping controllers, or block in interrupt context */
if ((ohci->hc_control & OHCI_CTRL_HCFS) != OHCI_USB_OPER || in_interrupt ()) {
dbg ("controller being disabled");
ohci->disabled = 1;
}
/* on return, USB will always be reset (if present) */
if (ohci->disabled)
writel (ohci->hc_control = OHCI_USB_RESET,
&ohci->regs->control);
hc_release_ohci (ohci);
}
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(hc_add_ohci);
EXPORT_SYMBOL(hc_remove_ohci);
EXPORT_SYMBOL(hc_start);
EXPORT_SYMBOL(hc_reset);
EXPORT_SYMBOL(dl_done_list);
EXPORT_SYMBOL(dl_reverse_done_list);
EXPORT_SYMBOL(usb_ed_lock);
drivers/usb/host/usb-ohci.h deleted 100644 → 0
View file @ 0d84f0ac
/*
* URB OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2001 David Brownell <dbrownell@users.sourceforge.net>
*
* usb-ohci.h
*/
static int cc_to_error[16] = {
/* mapping of the OHCI CC status to error codes */
/* No Error */ 0,
/* CRC Error */ -EILSEQ,
/* Bit Stuff */ -EPROTO,
/* Data Togg */ -EILSEQ,
/* Stall */ -EPIPE,
/* DevNotResp */ -ETIMEDOUT,
/* PIDCheck */ -EPROTO,
/* UnExpPID */ -EPROTO,
/* DataOver */ -EOVERFLOW,
/* DataUnder */ -EREMOTEIO,
/* reservd */ -ETIMEDOUT,
/* reservd */ -ETIMEDOUT,
/* BufferOver */ -ECOMM,
/* BuffUnder */ -ENOSR,
/* Not Access */ -ETIMEDOUT,
/* Not Access */ -ETIMEDOUT
};
#include <linux/config.h>
/* ED States */
#define ED_NEW 0x00
#define ED_UNLINK 0x01
#define ED_OPER 0x02
#define ED_DEL 0x04
#define ED_URB_DEL 0x08
/* usb_ohci_ed */
struct ed {
__u32 hwINFO;
__u32 hwTailP;
__u32 hwHeadP;
__u32 hwNextED;
struct ed * ed_prev;
__u8 int_period;
__u8 int_branch;
__u8 int_load;
__u8 int_interval;
__u8 state;
__u8 type;
__u16 last_iso;
struct ed * ed_rm_list;
dma_addr_t dma;
__u32 unused[3];
} __attribute((aligned(16)));
typedef struct ed ed_t;
/* TD info field */
#define TD_CC 0xf0000000
#define TD_CC_GET(td_p) ((td_p >>28) & 0x0f)
#define TD_CC_SET(td_p, cc) (td_p) = ((td_p) & 0x0fffffff) | (((cc) & 0x0f) << 28)
#define TD_EC 0x0C000000
#define TD_T 0x03000000
#define TD_T_DATA0 0x02000000
#define TD_T_DATA1 0x03000000
#define TD_T_TOGGLE 0x00000000
#define TD_R 0x00040000
#define TD_DI 0x00E00000
#define TD_DI_SET(X) (((X) & 0x07)<< 21)
#define TD_DP 0x00180000
#define TD_DP_SETUP 0x00000000
#define TD_DP_IN 0x00100000
#define TD_DP_OUT 0x00080000
#define TD_ISO 0x00010000
#define TD_DEL 0x00020000
/* CC Codes */
#define TD_CC_NOERROR 0x00
#define TD_CC_CRC 0x01
#define TD_CC_BITSTUFFING 0x02
#define TD_CC_DATATOGGLEM 0x03
#define TD_CC_STALL 0x04
#define TD_DEVNOTRESP 0x05
#define TD_PIDCHECKFAIL 0x06
#define TD_UNEXPECTEDPID 0x07
#define TD_DATAOVERRUN 0x08
#define TD_DATAUNDERRUN 0x09
#define TD_BUFFEROVERRUN 0x0C
#define TD_BUFFERUNDERRUN 0x0D
#define TD_NOTACCESSED 0x0F
#define MAXPSW 1
struct td {
__u32 hwINFO;
__u32 hwCBP; /* Current Buffer Pointer */
__u32 hwNextTD; /* Next TD Pointer */
__u32 hwBE; /* Memory Buffer End Pointer */
__u16 hwPSW[MAXPSW];
__u8 unused;
__u8 index;
struct ed * ed;
struct td * next_dl_td;
struct urb * urb;
dma_addr_t td_dma;
dma_addr_t data_dma;
__u32 unused2[2];
} __attribute((aligned(32))); /* normally 16, iso needs 32 */
typedef struct td td_t;
#define OHCI_ED_SKIP (1 << 14)
/*
* The HCCA (Host Controller Communications Area) is a 256 byte
* structure defined in the OHCI spec. that the host controller is
* told the base address of. It must be 256-byte aligned.
*/
#define NUM_INTS 32 /* part of the OHCI standard */
struct ohci_hcca {
__u32 int_table[NUM_INTS]; /* Interrupt ED table */
__u16 frame_no; /* current frame number */
__u16 pad1; /* set to 0 on each frame_no change */
__u32 done_head; /* info returned for an interrupt */
u8 reserved_for_hc[116];
} __attribute((aligned(256)));
/*
* Maximum number of root hub ports.
*/
#define MAX_ROOT_PORTS 15 /* maximum OHCI root hub ports */
/*
* This is the structure of the OHCI controller's memory mapped I/O
* region. This is Memory Mapped I/O. You must use the readl() and
* writel() macros defined in asm/io.h to access these!!
*/
struct ohci_regs {
/* control and status registers */
__u32 revision;
__u32 control;
__u32 cmdstatus;
__u32 intrstatus;
__u32 intrenable;
__u32 intrdisable;
/* memory pointers */
__u32 hcca;
__u32 ed_periodcurrent;
__u32 ed_controlhead;
__u32 ed_controlcurrent;
__u32 ed_bulkhead;
__u32 ed_bulkcurrent;
__u32 donehead;
/* frame counters */
__u32 fminterval;
__u32 fmremaining;
__u32 fmnumber;
__u32 periodicstart;
__u32 lsthresh;
/* Root hub ports */
struct ohci_roothub_regs {
__u32 a;
__u32 b;
__u32 status;
__u32 portstatus[MAX_ROOT_PORTS];
} roothub;
} __attribute((aligned(32)));
/* OHCI CONTROL AND STATUS REGISTER MASKS */
/*
* HcControl (control) register masks
*/
#define OHCI_CTRL_CBSR (3 << 0) /* control/bulk service ratio */
#define OHCI_CTRL_PLE (1 << 2) /* periodic list enable */
#define OHCI_CTRL_IE (1 << 3) /* isochronous enable */
#define OHCI_CTRL_CLE (1 << 4) /* control list enable */
#define OHCI_CTRL_BLE (1 << 5) /* bulk list enable */
#define OHCI_CTRL_HCFS (3 << 6) /* host controller functional state */
#define OHCI_CTRL_IR (1 << 8) /* interrupt routing */
#define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
#define OHCI_CTRL_RWE (1 << 10) /* remote wakeup enable */
/* pre-shifted values for HCFS */
# define OHCI_USB_RESET (0 << 6)
# define OHCI_USB_RESUME (1 << 6)
# define OHCI_USB_OPER (2 << 6)
# define OHCI_USB_SUSPEND (3 << 6)
/*
* HcCommandStatus (cmdstatus) register masks
*/
#define OHCI_HCR (1 << 0) /* host controller reset */
#define OHCI_CLF (1 << 1) /* control list filled */
#define OHCI_BLF (1 << 2) /* bulk list filled */
#define OHCI_OCR (1 << 3) /* ownership change request */
#define OHCI_SOC (3 << 16) /* scheduling overrun count */
/*
* masks used with interrupt registers:
* HcInterruptStatus (intrstatus)
* HcInterruptEnable (intrenable)
* HcInterruptDisable (intrdisable)
*/
#define OHCI_INTR_SO (1 << 0) /* scheduling overrun */
#define OHCI_INTR_WDH (1 << 1) /* writeback of done_head */
#define OHCI_INTR_SF (1 << 2) /* start frame */
#define OHCI_INTR_RD (1 << 3) /* resume detect */
#define OHCI_INTR_UE (1 << 4) /* unrecoverable error */
#define OHCI_INTR_FNO (1 << 5) /* frame number overflow */
#define OHCI_INTR_RHSC (1 << 6) /* root hub status change */
#define OHCI_INTR_OC (1 << 30) /* ownership change */
#define OHCI_INTR_MIE (1 << 31) /* master interrupt enable */
/* Virtual Root HUB */
struct virt_root_hub {
int devnum; /* Address of Root Hub endpoint */
void * urb;
void * int_addr;
int send;
int interval;
struct timer_list rh_int_timer;
};
/* USB HUB CONSTANTS (not OHCI-specific; see hub.h) */
/* destination of request */
#define RH_INTERFACE 0x01
#define RH_ENDPOINT 0x02
#define RH_OTHER 0x03
#define RH_CLASS 0x20
#define RH_VENDOR 0x40
/* Requests: bRequest << 8 | bmRequestType */
#define RH_GET_STATUS 0x0080
#define RH_CLEAR_FEATURE 0x0100
#define RH_SET_FEATURE 0x0300
#define RH_SET_ADDRESS 0x0500
#define RH_GET_DESCRIPTOR 0x0680
#define RH_SET_DESCRIPTOR 0x0700
#define RH_GET_CONFIGURATION 0x0880
#define RH_SET_CONFIGURATION 0x0900
#define RH_GET_STATE 0x0280
#define RH_GET_INTERFACE 0x0A80
#define RH_SET_INTERFACE 0x0B00
#define RH_SYNC_FRAME 0x0C80
/* Our Vendor Specific Request */
#define RH_SET_EP 0x2000
/* Hub port features */
#define RH_PORT_CONNECTION 0x00
#define RH_PORT_ENABLE 0x01
#define RH_PORT_SUSPEND 0x02
#define RH_PORT_OVER_CURRENT 0x03
#define RH_PORT_RESET 0x04
#define RH_PORT_POWER 0x08
#define RH_PORT_LOW_SPEED 0x09
#define RH_C_PORT_CONNECTION 0x10
#define RH_C_PORT_ENABLE 0x11
#define RH_C_PORT_SUSPEND 0x12
#define RH_C_PORT_OVER_CURRENT 0x13
#define RH_C_PORT_RESET 0x14
/* Hub features */
#define RH_C_HUB_LOCAL_POWER 0x00
#define RH_C_HUB_OVER_CURRENT 0x01
#define RH_DEVICE_REMOTE_WAKEUP 0x00
#define RH_ENDPOINT_STALL 0x01
#define RH_ACK 0x01
#define RH_REQ_ERR -1
#define RH_NACK 0x00
/* OHCI ROOT HUB REGISTER MASKS */
/* roothub.portstatus [i] bits */
#define RH_PS_CCS 0x00000001 /* current connect status */
#define RH_PS_PES 0x00000002 /* port enable status*/
#define RH_PS_PSS 0x00000004 /* port suspend status */
#define RH_PS_POCI 0x00000008 /* port over current indicator */
#define RH_PS_PRS 0x00000010 /* port reset status */
#define RH_PS_PPS 0x00000100 /* port power status */
#define RH_PS_LSDA 0x00000200 /* low speed device attached */
#define RH_PS_CSC 0x00010000 /* connect status change */
#define RH_PS_PESC 0x00020000 /* port enable status change */
#define RH_PS_PSSC 0x00040000 /* port suspend status change */
#define RH_PS_OCIC 0x00080000 /* over current indicator change */
#define RH_PS_PRSC 0x00100000 /* port reset status change */
/* roothub.status bits */
#define RH_HS_LPS 0x00000001 /* local power status */
#define RH_HS_OCI 0x00000002 /* over current indicator */
#define RH_HS_DRWE 0x00008000 /* device remote wakeup enable */
#define RH_HS_LPSC 0x00010000 /* local power status change */
#define RH_HS_OCIC 0x00020000 /* over current indicator change */
#define RH_HS_CRWE 0x80000000 /* clear remote wakeup enable */
/* roothub.b masks */
#define RH_B_DR 0x0000ffff /* device removable flags */
#define RH_B_PPCM 0xffff0000 /* port power control mask */
/* roothub.a masks */
#define RH_A_NDP (0xff << 0) /* number of downstream ports */
#define RH_A_PSM (1 << 8) /* power switching mode */
#define RH_A_NPS (1 << 9) /* no power switching */
#define RH_A_DT (1 << 10) /* device type (mbz) */
#define RH_A_OCPM (1 << 11) /* over current protection mode */
#define RH_A_NOCP (1 << 12) /* no over current protection */
#define RH_A_POTPGT (0xff << 24) /* power on to power good time */
/* urb */
typedef struct
{
ed_t * ed;
__u16 length; // number of tds associated with this request
__u16 td_cnt; // number of tds already serviced
int state;
wait_queue_head_t * wait;
td_t * td[0]; // list pointer to all corresponding TDs associated with this request
} urb_priv_t;
#define URB_DEL 1
/* Hash struct used for TD/ED hashing */
struct hash_t {
void *virt;
dma_addr_t dma;
struct hash_t *next; // chaining for collision cases
};
/* List of TD/ED hash entries */
struct hash_list_t {
struct hash_t *head;
struct hash_t *tail;
};
#define TD_HASH_SIZE 64 /* power'o'two */
#define ED_HASH_SIZE 64 /* power'o'two */
#define TD_HASH_FUNC(td_dma) ((td_dma ^ (td_dma >> 5)) % TD_HASH_SIZE)
#define ED_HASH_FUNC(ed_dma) ((ed_dma ^ (ed_dma >> 5)) % ED_HASH_SIZE)
/*
* This is the full ohci controller description
*
* Note how the "proper" USB information is just
* a subset of what the full implementation needs. (Linus)
*/
typedef struct ohci {
struct ohci_hcca *hcca; /* hcca */
dma_addr_t hcca_dma;
int irq;
int disabled; /* e.g. got a UE, we're hung */
int sleeping;
atomic_t resume_count; /* defending against multiple resumes */
unsigned long flags; /* for HC bugs */
#define OHCI_QUIRK_AMD756 0x01 /* erratum #4 */
struct ohci_regs * regs; /* OHCI controller's memory */
struct list_head ohci_hcd_list; /* list of all ohci_hcd */
struct ohci * next; // chain of ohci device contexts
struct list_head timeout_list;
// struct list_head urb_list; // list of all pending urbs
// spinlock_t urb_list_lock; // lock to keep consistency
int ohci_int_load[32]; /* load of the 32 Interrupt Chains (for load balancing)*/
ed_t * ed_rm_list[2]; /* lists of all endpoints to be removed */
ed_t * ed_bulktail; /* last endpoint of bulk list */
ed_t * ed_controltail; /* last endpoint of control list */
ed_t * ed_isotail; /* last endpoint of iso list */
int intrstatus;
__u32 hc_control; /* copy of the hc control reg */
struct usb_bus * bus;
struct usb_device * dev[128];
struct virt_root_hub rh;
/* PCI device handle, settings, ... */
struct pci_dev *ohci_dev;
const char *slot_name;
u8 pci_latency;
struct pci_pool *td_cache;
struct pci_pool *dev_cache;
struct hash_list_t td_hash[TD_HASH_SIZE];
struct hash_list_t ed_hash[ED_HASH_SIZE];
} ohci_t;
#define NUM_EDS 32 /* num of preallocated endpoint descriptors */
struct ohci_device {
ed_t ed[NUM_EDS];
dma_addr_t dma;
int ed_cnt;
wait_queue_head_t * wait;
};
// #define ohci_to_usb(ohci) ((ohci)->usb)
#define usb_to_ohci(usb) ((struct ohci_device *)(usb)->hcpriv)
/* For initializing controller (mask in an HCFS mode too) */
#define OHCI_CONTROL_INIT \
(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
/* hcd */
/* endpoint */
static int ep_link(ohci_t * ohci, ed_t * ed);
static int ep_unlink(ohci_t * ohci, ed_t * ed);
static ed_t * ep_add_ed(struct usb_device * usb_dev, unsigned int pipe, int interval, int load, int mem_flags);
static void ep_rm_ed(struct usb_device * usb_dev, ed_t * ed);
/* td */
static void td_fill(ohci_t * ohci, unsigned int info, dma_addr_t data, int len, struct urb * urb, int index);
static void td_submit_urb(struct urb * urb);
/* root hub */
static int rh_submit_urb(struct urb * urb);
static int rh_unlink_urb(struct urb * urb);
static int rh_init_int_timer(struct urb * urb);
/*-------------------------------------------------------------------------*/
#define ALLOC_FLAGS (in_interrupt () ? GFP_ATOMIC : GFP_KERNEL)
#ifdef DEBUG
# define OHCI_MEM_FLAGS SLAB_POISON
#else
# define OHCI_MEM_FLAGS 0
#endif
/* Recover a TD/ED using its collision chain */
static void *
dma_to_ed_td (struct hash_list_t * entry, dma_addr_t dma)
{
struct hash_t * scan = entry->head;
while (scan && scan->dma != dma)
scan = scan->next;
if (!scan)
BUG();
return scan->virt;
}
static struct ed *
dma_to_ed (struct ohci * hc, dma_addr_t ed_dma)
{
return (struct ed *) dma_to_ed_td(&(hc->ed_hash[ED_HASH_FUNC(ed_dma)]),
ed_dma);
}
static struct td *
dma_to_td (struct ohci * hc, dma_addr_t td_dma)
{
return (struct td *) dma_to_ed_td(&(hc->td_hash[TD_HASH_FUNC(td_dma)]),
td_dma);
}
/* Add a hash entry for a TD/ED; return true on success */
static int
hash_add_ed_td(struct hash_list_t * entry, void * virt, dma_addr_t dma)
{
struct hash_t * scan;
scan = (struct hash_t *)kmalloc(sizeof(struct hash_t), ALLOC_FLAGS);
if (!scan)
return 0;
if (!entry->tail) {
entry->head = entry->tail = scan;
} else {
entry->tail->next = scan;
entry->tail = scan;
}
scan->virt = virt;
scan->dma = dma;
scan->next = NULL;
return 1;
}
static int
hash_add_ed (struct ohci * hc, struct ed * ed)
{
return hash_add_ed_td (&(hc->ed_hash[ED_HASH_FUNC(ed->dma)]),
ed, ed->dma);
}
static int
hash_add_td (struct ohci * hc, struct td * td)
{
return hash_add_ed_td (&(hc->td_hash[TD_HASH_FUNC(td->td_dma)]),
td, td->td_dma);
}
static void
hash_free_ed_td (struct hash_list_t * entry, void * virt)
{
struct hash_t *scan, *prev;
scan = prev = entry->head;
// Find and unlink hash entry
while (scan && scan->virt != virt) {
prev = scan;
scan = scan->next;
}
if (scan) {
if (scan == entry->head) {
if (entry->head == entry->tail)
entry->head = entry->tail = NULL;
else
entry->head = scan->next;
} else if (scan == entry->tail) {
entry->tail = prev;
prev->next = NULL;
} else
prev->next = scan->next;
kfree(scan);
}
}
static void
hash_free_ed (struct ohci * hc, struct ed * ed)
{
hash_free_ed_td (&(hc->ed_hash[ED_HASH_FUNC(ed->dma)]), ed);
}
static void
hash_free_td (struct ohci * hc, struct td * td)
{
hash_free_ed_td (&(hc->td_hash[TD_HASH_FUNC(td->td_dma)]), td);
}
static int ohci_mem_init (struct ohci *ohci)
{
ohci->td_cache = pci_pool_create ("ohci_td", ohci->ohci_dev,
sizeof (struct td),
32 /* byte alignment */,
0 /* no page-crossing issues */,
GFP_KERNEL | OHCI_MEM_FLAGS);
if (!ohci->td_cache)
return -ENOMEM;
ohci->dev_cache = pci_pool_create ("ohci_dev", ohci->ohci_dev,
sizeof (struct ohci_device),
16 /* byte alignment */,
0 /* no page-crossing issues */,
GFP_KERNEL | OHCI_MEM_FLAGS);
if (!ohci->dev_cache)
return -ENOMEM;
return 0;
}
static void ohci_mem_cleanup (struct ohci *ohci)
{
if (ohci->td_cache) {
pci_pool_destroy (ohci->td_cache);
ohci->td_cache = 0;
}
if (ohci->dev_cache) {
pci_pool_destroy (ohci->dev_cache);
ohci->dev_cache = 0;
}
}
/* TDs ... */
static struct td *
td_alloc (struct ohci *hc, int mem_flags)
{
dma_addr_t dma;
struct td *td;
td = pci_pool_alloc (hc->td_cache, mem_flags, &dma);
if (td) {
td->td_dma = dma;
/* hash it for later reverse mapping */
if (!hash_add_td (hc, td)) {
pci_pool_free (hc->td_cache, td, dma);
return NULL;
}
}
return td;
}
static inline void
td_free (struct ohci *hc, struct td *td)
{
hash_free_td (hc, td);
pci_pool_free (hc->td_cache, td, td->td_dma);
}
/* DEV + EDs ... only the EDs need to be consistent */
static struct ohci_device *
dev_alloc (struct ohci *hc, int mem_flags)
{
dma_addr_t dma;
struct ohci_device *dev;
int i, offset;
dev = pci_pool_alloc (hc->dev_cache, mem_flags, &dma);
if (dev) {
memset (dev, 0, sizeof (*dev));
dev->dma = dma;
offset = ((char *)&dev->ed) - ((char *)dev);
for (i = 0; i < NUM_EDS; i++, offset += sizeof dev->ed [0])
dev->ed [i].dma = dma + offset;
/* add to hashtable if used */
}
return dev;
}
static inline void
dev_free (struct ohci *hc, struct ohci_device *dev)
{
pci_pool_free (hc->dev_cache, dev, dev->dma);
}
extern spinlock_t usb_ed_lock;
extern void dl_done_list (ohci_t * ohci, td_t * td_list);
extern td_t * dl_reverse_done_list (ohci_t * ohci);
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7