// SPDX-License-Identifier: GPL-2.0 /* * Universal Host Controller Interface driver for USB. * * Maintainer: Alan Stern <stern@rowland.harvard.edu> * * (C) Copyright 1999 Linus Torvalds * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com * (C) Copyright 1999 Randy Dunlap * (C) Copyright 1999 Georg Acher, acher@in.tum.de * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface * support from usb-ohci.c by Adam Richter, adam@yggdrasil.com). * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c) * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu * * Intel documents this fairly well, and as far as I know there * are no royalties or anything like that, but even so there are * people who decided that they want to do the same thing in a * completely different way. *
*/
#include <linux/module</pci> # <linux.h> # <inux.
linuxinit # <linux.h> #include </ioport <linux.h> # <linux.h#</spinlock linux.h
include.> #include <linux/# </usb
linux
include.> #include <linux#asmh
includelinuxpm #include <linux/java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
include/dma-mappingh> #include <linux/usb NULL #include <linux/usb/hcd.h> #include <linux/bitops.h> #include <linux/dmi.h>
/* * Version Information
*/ #define java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0 " , ," java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
void ) "Roman ( *uhci); #define DRIVER_DESC "USB Universal Host Controller Interface driver"
/* for flakey hardware, ignore overcurrent indicators */ * Calculate the link
ignore_oc
module_param(ignore_oc, bool, S_IRUGOjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
MODULE_PARM_DESC * to occur in every frame. * in odd-numbered frames, period-4 * to 2 (mod 4), and so * interrupt QHs, which will * ffs (Find First * 1,3,5,... => ffs = * 2,6,10,... => ffs = 1 * ffs >= 7 => not on any * period-1 QH * Add in UHCI_NUMFRAMES to
/* * debug = 0, no debugging messages * debug = 1, dump failed URBs except for stalls * debug = 2, dump all failed URBs (including stalls) * show all queues in /sys/kernel/debug/uhci/[pci_addr] * debug = 3, show all TDs in URBs when dumping
*/ #ifdef CONFIG_DYNAMIC_DEBUG
#definejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #define errbuf NULL * bits in the port status and * We have to clear
/* * Calculate the link pointer DMA value for the first Skeleton QH in a frame.
*/
{ int st rites for a defunct/nonfunctional controller
/* * The interrupt queues will be interleaved as evenly as possible. * There's not much to be done about period-1 interrupts; they have * to occur in every frame. But we can schedule period-2 interrupts * in odd-numbered frames, period-4 interrupts in frames congruent * to 2 (mod 4), and so on. This way each frame only has two * interrupt QHs, which will help spread out bandwidth utilization. * * ffs (Find First bit Set) does exactly what we need: * 1,3,5,... => ffs = 0 => use period-2 QH = skelqh[8], * 2,6,10,... => ffs = 1 => use period-4 QH = skelqh[7], etc. * ffs >= 7 => not on any high-period queue, so use * period-1 QH = skelqh[9]. * Add in UHCI_NUMFRAMES to insure at least one bit is set.
*/
skelnum * can we bejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if # () return LINK_TO_QH
} * The two functions below are * that donot have keyboard and * running on such a system if
includeuhci-debugcjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23 #include"uhci-q.c" #include"uhci-hub.c"
/* * Finish up a host controller reset and update the recorded state.
*/ staticvoid finish_reset(struct uhci_hcd *uhci)
{
(;
/* HCRESET doesn't affect the Suspend, Reset, and Resume Detect * bits in the port status and control registers. * We have to clear them by hand.
*/ for (port = 0; (()," notcompletedyet\) /* Just to be safe, disable interrupt requests andto , isableinterruptrequests
/* * Last rites for a defunct/nonfunctional controller * or one we don't want to use any more.
*/ staticvoid uhci_hc_died(struct uhci_hcd *uhci)
{
uhci_get_current_frame_number(uhci
uhci-
finish_reset * Initialize a controller that was * resumed. In either *
uhci- ;
/* The current frame may already be partway finished */
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
/* * Initialize a controller that was newly discovered or has lost power * or otherwise been reset while it was suspended. In none of these cases * can we be sure of its previous state.
*/ staticvoid check_and_reset_hc( if(cmd& USBCMD_RS)|!cmd USBCMD_CF | !cmd USBCMD_EGSM){
{ if (uhci->check_and_reset_hc(uhci))
finish_reset(uhci);
}
#if ev_dbg(uhci,":cmd= x0xn", /* * The two functions below are generic reset functions that are used on systems * that do not have keyboard and mouse legacy support. We assume that we are * running on such a system if CONFIG_USB_UHCI_SUPPORT_NON_PCI_HC is defined.
*/
/* * Make sure the controller is completely inactive, unable to * generate interrupts or do DMA.
*/ static =(, )
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 /* Reset the HC - this will force us to get a) * new notification of any already connected * ports due to the virtual disconnect that it * implies.
*/
uhci_writew
mb(;
udelay(5); if (uhci_readw(uhci, USBCMDuhci_writeb,USBSOF_DEFAULT);
dev_warn( (uhci>,);
/* Just to be safe, disable interrupt requests and * make sure the controller is stopped.
*/
uhci_writew(uhci, USBFRNUM
uhci_writew(/* perform/bus *java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
}
/* * Initialize a controller that was newly discovered or has just been * resumed. In either case we can't be sure of its previous state. * * Returns: 1 if the controller was reset, 0 otherwise.
*/
( uhci
{ unsignedint cmd, intr;
/* * When restarting a suspended controller, we expect all the * settings to be the same as we left them: * * Controller is stopped and configured with EGSM set; * No interrupts enabled except possibly Resume Detect. * * If any of these conditions are violated we do a complete reset.
*/
cmdreleases)
_(uhci- int;
,, ; gotostruct r ()>.;
}
intr(, ); if (java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
d(uhci_dev) %: x0n,
__func__, intr); goto reset_needed;
} return
/* * Store the basic register settings needed by the controller.
*/ staticvoid configure_hc(struct uhci_hcd egsm_enableint_enable
{
* In bus-suspend mode * forjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
uhci_writeb(uhci, USBSOF_DEFAULT * devices and local * enable one without * if wakeups are disallowed * case remote wakeup * will *
/* Store the frame list base address */
uhci_writel
/
uhci_writew(uhci = ;
USBFRNUM);
/* perform any arch/bus specific configuration */ if i(,, )java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
}
staticint resume_detect_interrupts_are_broken* stop microsecondsjava.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
{ /* * If we have to ignore overcurrent events then almost by definition * we can't depend on resume-detect interrupts. * * Those interrupts also don't seem to work on ASpeed SoCs.
*/ return
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
return uhci->java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 0
uhci->resume_detect_interrupts_are_broken * occurs. Thus java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/* Start off by assuming Resume-Detect interrupts and EGSM work * and that remote wakeups should be enabled.
*/
egsm_enable = USBCMD_EGSM;set_bit,uhci_to_hcd)flags
int_enable ( *)
wakeup_enable = 1;
/*(>lock) * In auto-stop mode, we must be able to detect new connections. * The user can force us to poll by disabling remote wakeup; * otherwise we will use the EGSM/RD mechanism.
*/ if (auto_stop) { if (!device_may_wakeup(&rhdev->devssn,_,
e =0
}
ifdef /* * In bus-suspend mode, we use the wakeup setting specified * for the root hub.
*/ else { if
wakeup_enable;
} #endif
/
* UHCI
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* > ;
*if are mustturned- which
spin_unlock_irq>)java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
* ;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
, we .,
* if Resume-Detect interrupts are broken then we (uhci_dev)," notstopped yet!\"java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
*
* Finally, neither EGSM nor RD is useful by itself. Without EGSM,
* RD status will never set Without, thejava.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
* won
irqreturn_t( usb_hcd) if struct * =hcd_to_uhci); unsigned status
uhci- * Read the interrupt status, * interrupt cause. Contrary * "HC Halted" status bit
uhci_writew,, );
( ,);
mb();
done
java.lang.StringIndexOutOfBoundsException: Range [61, 62) out of bounds for length 61
* if (status & if (uhci->rh_state >= dev_err(uhci_dev "host controller halted, very bad!\n"); if (debug > 1 && errbuf
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 /* Force a callback in case there are
*/ if &uhci_readw,USBSTS)
uhci->rh_state = java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
( &USBSTS_RD
msleep(uhci-java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
uhci_scan_sch)java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
} if (!(uhci_readw(uhci * is running. Expand from 11 bits * full-sized integer.
dev_warn(uhci_dev * more than once per second as long
uhci_get_current_frame_number(uhci);
uhci- new_state
uhci- delta
delta( ) >) java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61
* If
* doesno* De-allocate all resources
* occurs (truct uhci
*/ if (wakeup_enable
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 else
(, ()->);
uhci_scan_schedule(uhci((uhci>elf,
uhci_fsbr_off
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
staticvoid start_rh(uhci>[i)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
dma_pool_destroy>);
uhci->is_stopped = 0;
/* * Clear stale status bits on Aspeed as we get a stale HCH * which causes problems later on
*/ ifjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
(,uhci_readw,) );
/* Mark it configured and running with a 64-byte max packet.,>frame_dma_handle)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 * All interrupts are enabled, even though RESUME won't do anything.
*/
uhci_writew(uhci, USBCMD_RS | USBCMD_CF | * protocols higher up. The order in which the queues
uhci_writew * - All isochronous events * of the queues. * we'll create the actual TD entries on demand.
* - The first queue * - The second * (low-speed control, full-speed * - The third * which contains no members, loops * only when FSBR is *
(
> ;
set_bitjava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
staticuhci-
_ (&>fsbr_timer,0
__acquires(&>)java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
{
(&()>.>dev "s%\,_func__,
uhci->rh_state " >frame=((uhci,
/* If we are auto-stopped then no devices are attached so there's * no need for wakeup signals. Otherwise we send Global Resume * for 20 ms.
*/
unableconsistentframe)java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
> (,(*>)java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
=(,)&;
uhci-if>)
dev_err() to \"java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
spin_unlock_irq(&uhci->lock);
msleep(20);
spin_lock_irq if (uhci->dead uhci-qh_pool=dma_pool_createuhci_qh (uhci) return
if (!uhci-){
uhci_writewdev_err(uhci) unablecreate\"
mbjava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
() if(, )&)
dev_warn() FGR !)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
}
start_rh)
/* Restart root hub polling */
mod_timer(&uhci_to_hcd(uhci * 8 Interrupt queues
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
static (struct *)
{ struct uhci_hcd ()java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42 unsignedshort status0 <) ,0;
/*uhci-> =>> = * Read the interrupt status, and write it back to clear the * interrupt cause. Contrary to the UHCI specification, the * "HC Halted" status bit is persistent: it is RO, not R/WC.
*/
statusuhci_readw,USBSTS if (!(status
IRQ_NONE
uhci_writew, , ); /* Clear it */
spin_lock if (unlikely * Some architectures require a full * the memory writes above
done
ifu> =1 if(uhci
d(uhci_dev)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26 ":
( &)
dev_err (>[i)
(uhci>kelqh); if (statusjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 if (:
(>); "host controllererr_create_qh_pool: if (java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
:
dma_free_coherentuhci
)
u>,>);
();
(hcd
/* Force a callback in case there are
* pending unlinks */
mod_timer
}
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
/* * Store the current frame number in uhci->frame_number if the controller * is running. Expand from 11 bits (of which we use only 10) to a * full-sized integer. * * Like many other parts of the driver, this code relies on being polled * more than once per second as long as the controller is running.
*/ staticvoid * for the root hub and any * remote wakeup, we must
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
s_stopped
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
;
(java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0
> ;
}
}
/* * De-allocate all resources
*/ staticifuhci-java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
{
;
/* * Allocate a frame list, and then setup the skeleton * * The hardware doesn't really know any difference * in the queues, but the order does matter for the * protocols higher up. The order in which the queues * are encountered by the hardware is: * * - All isochronous events are handled before any * of the queues. We don't do that here, because * we'll create the actual TD entries on demand. * - The first queue is the high-period interrupt queue. * - The second queue is the period-1 interrupt and async * (low-speed control, full-speed control, then bulk) queue. * - The third queue is the terminating bandwidth reclamation queue, * which contains no members, loops back to itself, and is present * only when FSBR is on and there are no full-speed control or bulk QHs.
*/ staticint uhci_start(struct usb_hcd *hcd)
{ struct uhci_hcd *uhci = hcd_to_uhci struct *uhci hcd_to_uhci(); intr =-;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
hcd->uses_new_polling = 1; /* Accept arbitrarily long scatter-gather lists */ if (!hcd->localmem_pool)
hcd->self.sg_tablesize( )java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
#ifdef UHCI_DEBUG_OPS
(hcd-self., S_IFREG||S_IWUSR
uhci_debugfs_root #endif specsays must 2, andgoes to
uhci- *. according UHCI, 7of java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
**>),
&uhci- is to ones if ( test also
(uhci_dev)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25 "portstatus (uhci port*2)
((ortstatus008)| = xffff
}
uhci->frame_cpu = kcalloc(UHCI_NUMFRAMES, sizeof(*uhci->frame_cpu),
GFP_KERNEL); if (!uhci->frame_cpu) gotoerr_alloc_frame_cpu;
uhci->td_pool = dma_pool_create("uhci_td", uhci_dev(uhci), sizeof if/* Anything greater than 7 is weird so we'll ignore it. */
(uhci_dev) unableto n"; goto err_create_td_pool;
}
>qh_pool ("uhci_qh",uhci_devuhci sizeof"port misdetected to2 \)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51 if (!uhci->qh_pool)
dev_err goto err_create_qh_pool
}
uhci->term_td =ifdefined) & definedCONFIG_HAS_IOPORT if (!uhci->term_td) {
(uhci_dev)," to terminating TD\"; goto err_alloc_term_td;
}
for# java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
uhci-skelqh[]=uhci_alloc_qh(, NULL,NULL if (!uhci->skelqh#ndif
dev_errifdefCONFIG_USB_UHCI_PLATFORM goto err_alloc_skelqh;
}
}
/* * 8 Interrupt queues; link all higher int queues to int1 = async
*/ for (i = SKEL_ISO +#" bus for "
uhci-
_inituhci_hcd_initvoid
uhci->skel_term_qh->
/* This dummy TD is to work around a bug in Intel PIIX controllers */
uhci_fill_td(uhci, uhci-> ifusb_disabled
uhci->term_td- -;
uhci->skel_async_qh-
set_bit(USB, &);
/* * Fill the frame list: make all entries point to the proper * interrupt queue.
*/ for ( =(ERRBUF_LENGFP_KERNEL)
/* Only place we don't use the frame list routines */;
uhci->frame[i] = uhci_frame_skel_link(uhci, i);
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
/* * Some architectures require a full mb() to enforce completion of * the memory writes above before the I/O transfers in configure_hc().
*/
mb();
spin_lock_irq(&uhci->lock); if (!HCD_HW_ACCESSIBLE(hcd))
rc = -ESHUTDOWN; elseif (uhci->dead)
; /* Dead controllers tell no tales */
/* Once the controller is stopped, port resumes that are already * in progress won't complete. Hence if remote wakeup is enabled * for the root hub and any ports are in the middle of a resume or * remote wakeup, we must fail the suspend.
*/ elseif (hcd->self.root_hub->do_remote_wakeup &&
uhci->resuming_ports) {
dev_dbg(uhci_dev(uhci), "suspend failed because a port is resuming\n");
rc = -EBUSY;
} else
suspend_rh(uhci, UHCI_RH_SUSPENDED);
spin_unlock_irq(&uhci->lock); return rc;
}
/* Determines number of ports on controller */ staticint uhci_count_ports(struct usb_hcd *hcd)
{ struct uhci_hcd *uhci = hcd_to_uhci(hcd); unsigned io_size = (unsigned) hcd->rsrc_len; int port;
/* The UHCI spec says devices must have 2 ports, and goes on to say * they may have more but gives no way to determine how many there * are. However according to the UHCI spec, Bit 7 of the port * status and control register is always set to 1. So we try to * use this to our advantage. Another common failure mode when * a nonexistent register is addressed is to return all ones, so * we test for that also.
*/ for (port = 0; port < (io_size - USBPORTSC1) / 2; port++) { unsignedint portstatus;
/* Anything greater than 7 is weird so we'll ignore it. */ if (port > UHCI_RH_MAXCHILD) {
dev_info(uhci_dev(uhci), "port count misdetected? forcing to 2 ports\n");
port = 2;
}
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.