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/*
* Universal Host Controller Interface driver for USB (take II).
*
* (c) 1999-2001 Georg Acher, acher@in.tum.de (executive slave) (base guitar)
* Deti Fliegl, deti@fliegl.de (executive slave) (lead voice)
* Thomas Sailer, sailer@ife.ee.ethz.ch (chief consultant) (cheer leader)
* Roman Weissgaerber, weissg@vienna.at (virt root hub) (studio porter)
* (c) 2000 Yggdrasil Computing, Inc. (port of new PCI interface support
* from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
* (C) 2000 David Brownell, david-b@pacbell.net (usb-ohci.c)
*
* HW-initalization based on material of
*
* (C) Copyright 1999 Linus Torvalds
* (C) Copyright 1999 Johannes Erdfelt
* (C) Copyright 1999 Randy Dunlap
* (C) Copyright 1999 Gregory P. Smith
*
* $Id: usb-uhci.c,v 1.275 2002/01/19 20:57:33 acher Exp $
*/
#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/unistd.h>
#include <linux/interrupt.h> /* for in_interrupt() */
#include <linux/init.h>
#include <linux/version.h>
#include <linux/pm.h>
#include <linux/timer.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
/* This enables more detailed sanity checks in submit_iso */
//#define ISO_SANITY_CHECK
/* This enables debug printks */
#define DEBUG
/* This enables all symbols to be exported, to ease debugging oopses */
//#define DEBUG_SYMBOLS
/* This enables an extra UHCI slab for memory debugging */
#define DEBUG_SLAB
#define VERSTR "$Revision: 1.275 $ time " __TIME__ " " __DATE__
#include <linux/usb.h>
#include "usb-uhci.h"
#include "usb-uhci-debug.h"
/*
* Version Information
*/
#define DRIVER_VERSION "v1.275"
#define DRIVER_AUTHOR "Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber"
#define DRIVER_DESC "USB Universal Host Controller Interface driver"
#undef DEBUG
#undef dbg
#define dbg(format, arg...) do {} while (0)
#define DEBUG_SYMBOLS
#ifdef DEBUG_SYMBOLS
#define _static
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
#else
#define _static static
#endif
#define queue_dbg dbg //err
#define async_dbg dbg //err
#ifdef DEBUG_SLAB
static kmem_cache_t *urb_priv_kmem;
#endif
#define SLAB_FLAG (in_interrupt ()? SLAB_ATOMIC : SLAB_KERNEL)
#define KMALLOC_FLAG (in_interrupt ()? GFP_ATOMIC : GFP_KERNEL)
/* CONFIG_USB_UHCI_HIGH_BANDWITH turns on Full Speed Bandwidth
* Reclamation: feature that puts loop on descriptor loop when
* there's some transfer going on. With FSBR, USB performance
* is optimal, but PCI can be slowed down up-to 5 times, slowing down
* system performance (eg. framebuffer devices).
*/
#define CONFIG_USB_UHCI_HIGH_BANDWIDTH
/* *_DEPTH_FIRST puts descriptor in depth-first mode. This has
* somehow similar effect to FSBR (higher speed), but does not
* slow PCI down. OTOH USB performace is slightly slower than
* in FSBR case and single device could hog whole USB, starving
* other devices.
*/
#define USE_CTRL_DEPTH_FIRST 0 // 0: Breadth first, 1: Depth first
#define USE_BULK_DEPTH_FIRST 0 // 0: Breadth first, 1: Depth first
/* Turning off both CONFIG_USB_UHCI_HIGH_BANDWITH and *_DEPTH_FIRST
* will lead to <64KB/sec performance over USB for bulk transfers targeting
* one device's endpoint. You probably do not want to do that.
*/
// stop bandwidth reclamation after (roughly) 50ms
#define IDLE_TIMEOUT (HZ/20)
// Suppress HC interrupt error messages for 5s
#define ERROR_SUPPRESSION_TIME (HZ*5)
_static int rh_submit_urb (urb_t *urb);
_static int rh_unlink_urb (urb_t *urb);
_static int delete_qh (uhci_t *s, uhci_desc_t *qh);
_static int process_transfer (uhci_t *s, urb_t *urb, int mode);
_static int process_interrupt (uhci_t *s, urb_t *urb);
_static int process_iso (uhci_t *s, urb_t *urb, int force);
// How much URBs with ->next are walked
#define MAX_NEXT_COUNT 2048
static uhci_t *devs = NULL;
/* used by userspace UHCI data structure dumper */
uhci_t **uhci_devices = &devs;
/*-------------------------------------------------------------------*/
// Cleans up collected QHs, but not more than 100 in one go
void clean_descs(uhci_t *s, int force)
{
struct list_head *q;
uhci_desc_t *qh;
int now=UHCI_GET_CURRENT_FRAME(s), n=0;
q=s->free_desc.prev;
while (q != &s->free_desc && (force || n<100)) {
qh = list_entry (q, uhci_desc_t, horizontal);
q=qh->horizontal.prev;
if ((qh->last_used!=now) || force)
delete_qh(s,qh);
n++;
}
}
/*-------------------------------------------------------------------*/
_static void uhci_switch_timer_int(uhci_t *s)
{
if (!list_empty(&s->urb_unlinked))
set_td_ioc(s->td1ms);
else
clr_td_ioc(s->td1ms);
if (s->timeout_urbs)
set_td_ioc(s->td32ms);
else
clr_td_ioc(s->td32ms);
wmb();
}
/*-------------------------------------------------------------------*/
#ifdef CONFIG_USB_UHCI_HIGH_BANDWIDTH
_static void enable_desc_loop(uhci_t *s, urb_t *urb)
{
int flags;
if (urb->transfer_flags & USB_NO_FSBR)
return;
spin_lock_irqsave (&s->qh_lock, flags);
s->chain_end->hw.qh.head&=cpu_to_le32(~UHCI_PTR_TERM);
mb();
s->loop_usage++;
((urb_priv_t*)urb->hcpriv)->use_loop=1;
spin_unlock_irqrestore (&s->qh_lock, flags);
}
/*-------------------------------------------------------------------*/
_static void disable_desc_loop(uhci_t *s, urb_t *urb)
{
int flags;
if (urb->transfer_flags & USB_NO_FSBR)
return;
spin_lock_irqsave (&s->qh_lock, flags);
if (((urb_priv_t*)urb->hcpriv)->use_loop) {
s->loop_usage--;
if (!s->loop_usage) {
s->chain_end->hw.qh.head|=cpu_to_le32(UHCI_PTR_TERM);
mb();
}
((urb_priv_t*)urb->hcpriv)->use_loop=0;
}
spin_unlock_irqrestore (&s->qh_lock, flags);
}
#endif
/*-------------------------------------------------------------------*/
_static void queue_urb_unlocked (uhci_t *s, urb_t *urb)
{
struct list_head *p=&urb->urb_list;
#ifdef CONFIG_USB_UHCI_HIGH_BANDWIDTH
{
int type;
type=usb_pipetype (urb->pipe);
if ((type == PIPE_BULK) || (type == PIPE_CONTROL))
enable_desc_loop(s, urb);
}
#endif
urb->status = -EINPROGRESS;
((urb_priv_t*)urb->hcpriv)->started=jiffies;
list_add (p, &s->urb_list);
if (urb->timeout)
s->timeout_urbs++;
uhci_switch_timer_int(s);
}
/*-------------------------------------------------------------------*/
_static void queue_urb (uhci_t *s, urb_t *urb)
{
unsigned long flags=0;
spin_lock_irqsave (&s->urb_list_lock, flags);
queue_urb_unlocked(s,urb);
spin_unlock_irqrestore (&s->urb_list_lock, flags);
}
/*-------------------------------------------------------------------*/
_static void dequeue_urb (uhci_t *s, urb_t *urb)
{
#ifdef CONFIG_USB_UHCI_HIGH_BANDWIDTH
int type;
type=usb_pipetype (urb->pipe);
if ((type == PIPE_BULK) || (type == PIPE_CONTROL))
disable_desc_loop(s, urb);
#endif
list_del (&urb->urb_list);
if (urb->timeout && s->timeout_urbs)
s->timeout_urbs--;
}
/*-------------------------------------------------------------------*/
_static int alloc_td (uhci_t *s, uhci_desc_t ** new, int flags)
{
dma_addr_t dma_handle;
*new = pci_pool_alloc(s->desc_pool, GFP_DMA | GFP_ATOMIC, &dma_handle);
if (!*new)
return -ENOMEM;
memset (*new, 0, sizeof (uhci_desc_t));
(*new)->dma_addr = dma_handle;
set_td_link((*new), UHCI_PTR_TERM | (flags & UHCI_PTR_BITS)); // last by default
(*new)->type = TD_TYPE;
mb();
INIT_LIST_HEAD (&(*new)->vertical);
INIT_LIST_HEAD (&(*new)->horizontal);
return 0;
}
/*-------------------------------------------------------------------*/
// append a qh to td.link physically, the SW linkage is not affected
_static void append_qh(uhci_t *s, uhci_desc_t *td, uhci_desc_t* qh, int flags)
{
unsigned long xxx;
spin_lock_irqsave (&s->td_lock, xxx);
set_td_link(td, qh->dma_addr | (flags & UHCI_PTR_DEPTH) | UHCI_PTR_QH);
mb();
spin_unlock_irqrestore (&s->td_lock, xxx);
}
/*-------------------------------------------------------------------*/
/* insert td at last position in td-list of qh (vertical) */
_static int insert_td (uhci_t *s, uhci_desc_t *qh, uhci_desc_t* new, int flags)
{
uhci_desc_t *prev;
unsigned long xxx;
spin_lock_irqsave (&s->td_lock, xxx);
list_add_tail (&new->vertical, &qh->vertical);
prev = list_entry (new->vertical.prev, uhci_desc_t, vertical);
if (qh == prev ) {
// virgin qh without any tds
set_qh_element(qh, new->dma_addr | UHCI_PTR_TERM);
}
else {
// already tds inserted, implicitely remove TERM bit of prev
set_td_link(prev, new->dma_addr | (flags & UHCI_PTR_DEPTH));
}
mb();
spin_unlock_irqrestore (&s->td_lock, xxx);
return 0;
}
/*-------------------------------------------------------------------*/
/* insert new_td after td (horizontal) */
_static int insert_td_horizontal (uhci_t *s, uhci_desc_t *td, uhci_desc_t* new)
{
uhci_desc_t *next;
unsigned long flags;
spin_lock_irqsave (&s->td_lock, flags);
next = list_entry (td->horizontal.next, uhci_desc_t, horizontal);
list_add (&new->horizontal, &td->horizontal);
new->hw.td.link = td->hw.td.link;
set_td_link(td, new->dma_addr);
mb();
spin_unlock_irqrestore (&s->td_lock, flags);
return 0;
}
/*-------------------------------------------------------------------*/
_static int unlink_td (uhci_t *s, uhci_desc_t *element, int phys_unlink)
{
uhci_desc_t *next, *prev;
int dir = 0;
unsigned long flags;
spin_lock_irqsave (&s->td_lock, flags);
next = list_entry (element->vertical.next, uhci_desc_t, vertical);
if (next == element) {
dir = 1;
prev = list_entry (element->horizontal.prev, uhci_desc_t, horizontal);
}
else
prev = list_entry (element->vertical.prev, uhci_desc_t, vertical);
if (phys_unlink) {
// really remove HW linking
if (prev->type == TD_TYPE)
prev->hw.td.link = element->hw.td.link;
else
prev->hw.qh.element = element->hw.td.link;
}
mb ();
if (dir == 0)
list_del (&element->vertical);
else
list_del (&element->horizontal);
spin_unlock_irqrestore (&s->td_lock, flags);
return 0;
}
/*-------------------------------------------------------------------*/
_static int delete_desc (uhci_t *s, uhci_desc_t *element)
{
pci_pool_free(s->desc_pool, element, element->dma_addr);
return 0;
}
/*-------------------------------------------------------------------*/
// Allocates qh element
_static int alloc_qh (uhci_t *s, uhci_desc_t ** new)
{
dma_addr_t dma_handle;
*new = pci_pool_alloc(s->desc_pool, GFP_DMA | GFP_ATOMIC, &dma_handle);
if (!*new)
return -ENOMEM;
memset (*new, 0, sizeof (uhci_desc_t));
(*new)->dma_addr = dma_handle;
set_qh_head(*new, UHCI_PTR_TERM);
set_qh_element(*new, UHCI_PTR_TERM);
(*new)->type = QH_TYPE;
mb();
INIT_LIST_HEAD (&(*new)->horizontal);
INIT_LIST_HEAD (&(*new)->vertical);
dbg("Allocated qh @ %p", *new);
return 0;
}
/*-------------------------------------------------------------------*/
// inserts new qh before/after the qh at pos
// flags: 0: insert before pos, 1: insert after pos (for low speed transfers)
_static int insert_qh (uhci_t *s, uhci_desc_t *pos, uhci_desc_t *new, int order)
{
uhci_desc_t *old;
unsigned long flags;
spin_lock_irqsave (&s->qh_lock, flags);
if (!order) {
// (OLD) (POS) -> (OLD) (NEW) (POS)
old = list_entry (pos->horizontal.prev, uhci_desc_t, horizontal);
list_add_tail (&new->horizontal, &pos->horizontal);
set_qh_head(new, MAKE_QH_ADDR (pos)) ;
if (!(old->hw.qh.head & cpu_to_le32(UHCI_PTR_TERM)))
set_qh_head(old, MAKE_QH_ADDR (new)) ;
}
else {
// (POS) (OLD) -> (POS) (NEW) (OLD)
old = list_entry (pos->horizontal.next, uhci_desc_t, horizontal);
list_add (&new->horizontal, &pos->horizontal);
set_qh_head(new, MAKE_QH_ADDR (old));
set_qh_head(pos, MAKE_QH_ADDR (new)) ;
}
mb ();
spin_unlock_irqrestore (&s->qh_lock, flags);
return 0;
}
/*-------------------------------------------------------------------*/
_static int unlink_qh (uhci_t *s, uhci_desc_t *element)
{
uhci_desc_t *prev;
unsigned long flags;
spin_lock_irqsave (&s->qh_lock, flags);
prev = list_entry (element->horizontal.prev, uhci_desc_t, horizontal);
prev->hw.qh.head = element->hw.qh.head;
dbg("unlink qh %p, pqh %p, nxqh %p, to %08x", element, prev,
list_entry (element->horizontal.next, uhci_desc_t, horizontal),le32_to_cpu(element->hw.qh.head) &~15);
list_del(&element->horizontal);
mb ();
spin_unlock_irqrestore (&s->qh_lock, flags);
return 0;
}
/*-------------------------------------------------------------------*/
_static int delete_qh (uhci_t *s, uhci_desc_t *qh)
{
uhci_desc_t *td;
struct list_head *p;
list_del (&qh->horizontal);
while ((p = qh->vertical.next) != &qh->vertical) {
td = list_entry (p, uhci_desc_t, vertical);
dbg("unlink td @ %p",td);
unlink_td (s, td, 0); // no physical unlink
delete_desc (s, td);
}
delete_desc (s, qh);
return 0;
}
/*-------------------------------------------------------------------*/
_static void clean_td_chain (uhci_t *s, uhci_desc_t *td)
{
struct list_head *p;
uhci_desc_t *td1;
if (!td)
return;
while ((p = td->horizontal.next) != &td->horizontal) {
td1 = list_entry (p, uhci_desc_t, horizontal);
delete_desc (s, td1);
}
delete_desc (s, td);
}
/*-------------------------------------------------------------------*/
_static void fill_td (uhci_desc_t *td, int status, int info, __u32 buffer)
{
td->hw.td.status = cpu_to_le32(status);
td->hw.td.info = cpu_to_le32(info);
td->hw.td.buffer = cpu_to_le32(buffer);
}
/*-------------------------------------------------------------------*/
// Removes ALL qhs in chain (paranoia!)
_static void cleanup_skel (uhci_t *s)
{
unsigned int n;
uhci_desc_t *td;
dbg("cleanup_skel");
clean_descs(s,1);
if (s->td32ms) {
unlink_td(s,s->td32ms,1);
delete_desc(s, s->td32ms);
}
for (n = 0; n < 8; n++) {
td = s->int_chain[n];
clean_td_chain (s, td);
}
if (s->iso_td) {
for (n = 0; n < 1024; n++) {
td = s->iso_td[n];
clean_td_chain (s, td);
}
kfree (s->iso_td);
}
if (s->framelist)
pci_free_consistent(s->uhci_pci, PAGE_SIZE,
s->framelist, s->framelist_dma);
if (s->control_chain) {
// completed init_skel?
struct list_head *p;
uhci_desc_t *qh, *qh1;
qh = s->control_chain;
while ((p = qh->horizontal.next) != &qh->horizontal) {
qh1 = list_entry (p, uhci_desc_t, horizontal);
delete_qh (s, qh1);
}
delete_qh (s, qh);
}
else {
if (s->ls_control_chain)
delete_desc (s, s->ls_control_chain);
if (s->control_chain)
delete_desc (s, s->control_chain);
if (s->bulk_chain)
delete_desc (s, s->bulk_chain);
if (s->chain_end)
delete_desc (s, s->chain_end);
}
if (s->desc_pool) {
pci_pool_destroy(s->desc_pool);
s->desc_pool = NULL;
}
dbg("cleanup_skel finished");
}
/*-------------------------------------------------------------------*/
// allocates framelist and qh-skeletons
// only HW-links provide continous linking, SW-links stay in their domain (ISO/INT)
_static int init_skel (uhci_t *s)
{
int n, ret;
uhci_desc_t *qh, *td;
dbg("init_skel");
s->framelist = pci_alloc_consistent(s->uhci_pci, PAGE_SIZE,
&s->framelist_dma);
if (!s->framelist)
return -ENOMEM;
memset (s->framelist, 0, 4096);
dbg("creating descriptor pci_pool");
s->desc_pool = pci_pool_create("uhci_desc", s->uhci_pci,
sizeof(uhci_desc_t), 16, 0,
GFP_DMA | GFP_ATOMIC);
if (!s->desc_pool)
goto init_skel_cleanup;
dbg("allocating iso desc pointer list");
s->iso_td = (uhci_desc_t **) kmalloc (1024 * sizeof (uhci_desc_t*), GFP_KERNEL);
if (!s->iso_td)
goto init_skel_cleanup;
s->ls_control_chain = NULL;
s->control_chain = NULL;
s->bulk_chain = NULL;
s->chain_end = NULL;
dbg("allocating iso descs");
for (n = 0; n < 1024; n++) {
// allocate skeleton iso/irq-tds
if (alloc_td (s, &td, 0))
goto init_skel_cleanup;
s->iso_td[n] = td;
s->framelist[n] = cpu_to_le32((__u32) td->dma_addr);
}
dbg("allocating qh: chain_end");
if (alloc_qh (s, &qh))
goto init_skel_cleanup;
s->chain_end = qh;
if (alloc_td (s, &td, 0))
goto init_skel_cleanup;
fill_td (td, 0 * TD_CTRL_IOC, 0, 0); // generate 1ms interrupt (enabled on demand)
insert_td (s, qh, td, 0);
qh->hw.qh.element &= cpu_to_le32(~UHCI_PTR_TERM); // remove TERM bit
s->td1ms=td;
dbg("allocating qh: bulk_chain");
if (alloc_qh (s, &qh))
goto init_skel_cleanup;
insert_qh (s, s->chain_end, qh, 0);
s->bulk_chain = qh;
dbg("allocating qh: control_chain");
ret = alloc_qh (s, &qh);
if (ret)
goto init_skel_cleanup;
insert_qh (s, s->bulk_chain, qh, 0);
s->control_chain = qh;
#ifdef CONFIG_USB_UHCI_HIGH_BANDWIDTH
// disabled reclamation loop
set_qh_head(s->chain_end, s->control_chain->dma_addr | UHCI_PTR_QH | UHCI_PTR_TERM);
#endif
dbg("allocating qh: ls_control_chain");
if (alloc_qh (s, &qh))
goto init_skel_cleanup;
insert_qh (s, s->control_chain, qh, 0);
s->ls_control_chain = qh;
for (n = 0; n < 8; n++)
s->int_chain[n] = 0;
dbg("allocating skeleton INT-TDs");
for (n = 0; n < 8; n++) {
uhci_desc_t *td;
if (alloc_td (s, &td, 0))
goto init_skel_cleanup;
s->int_chain[n] = td;
if (n == 0) {
set_td_link(s->int_chain[0], s->ls_control_chain->dma_addr | UHCI_PTR_QH);
}
else {
set_td_link(s->int_chain[n], s->int_chain[0]->dma_addr);
}
}
dbg("Linking skeleton INT-TDs");
for (n = 0; n < 1024; n++) {
// link all iso-tds to the interrupt chains
int m, o;
dbg("framelist[%i]=%x",n,le32_to_cpu(s->framelist[n]));
if ((n&127)==127)
((uhci_desc_t*) s->iso_td[n])->hw.td.link = cpu_to_le32(s->int_chain[0]->dma_addr);
else
for (o = 1, m = 2; m <= 128; o++, m += m)
if ((n & (m - 1)) == ((m - 1) / 2))
set_td_link(((uhci_desc_t*) s->iso_td[n]), s->int_chain[o]->dma_addr);
}
if (alloc_td (s, &td, 0))
goto init_skel_cleanup;
fill_td (td, 0 * TD_CTRL_IOC, 0, 0); // generate 32ms interrupt (activated later)
s->td32ms=td;
insert_td_horizontal (s, s->int_chain[5], td);
mb();
//uhci_show_queue(s->control_chain);
dbg("init_skel exit");
return 0;
init_skel_cleanup:
cleanup_skel (s);
return -ENOMEM;
}
/*-------------------------------------------------------------------*/
// LOW LEVEL STUFF
// assembles QHs und TDs for control, bulk and iso
/*-------------------------------------------------------------------*/
_static int uhci_submit_control_urb (urb_t *urb)
{
uhci_desc_t *qh, *td;
uhci_t *s = (uhci_t*) urb->dev->bus->hcpriv;
urb_priv_t *urb_priv = urb->hcpriv;
unsigned long destination, status;
int maxsze = usb_maxpacket (urb->dev, urb->pipe, usb_pipeout (urb->pipe));
unsigned long len;
char *data;
int depth_first=USE_CTRL_DEPTH_FIRST; // UHCI descriptor chasing method
dbg("uhci_submit_control start");
if (alloc_qh (s, &qh)) // alloc qh for this request
return -ENOMEM;
if (alloc_td (s, &td, UHCI_PTR_DEPTH * depth_first)) // get td for setup stage
{
delete_qh (s, qh);
return -ENOMEM;
}
/* The "pipe" thing contains the destination in bits 8--18 */
destination = (urb->pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP;
/* 3 errors */
status = (urb->pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE |
(urb->transfer_flags & USB_DISABLE_SPD ? 0 : TD_CTRL_SPD) | (3 << 27);
/* Build the TD for the control request, try forever, 8 bytes of data */
fill_td (td, status, destination | (7 << 21), urb_priv->setup_packet_dma);
insert_td (s, qh, td, 0); // queue 'setup stage'-td in qh
#if 0
{
char *sp=urb->setup_packet;
dbg("SETUP to pipe %x: %x %x %x %x %x %x %x %x", urb->pipe,
sp[0],sp[1],sp[2],sp[3],sp[4],sp[5],sp[6],sp[7]);
}
//uhci_show_td(td);
#endif
len = urb->transfer_buffer_length;
data = urb->transfer_buffer;
/* If direction is "send", change the frame from SETUP (0x2D)
to OUT (0xE1). Else change it from SETUP to IN (0x69). */
destination = (urb->pipe & PIPE_DEVEP_MASK) | (usb_pipeout (urb->pipe)?USB_PID_OUT:USB_PID_IN);
while (len > 0) {
int pktsze = len;
if (alloc_td (s, &td, UHCI_PTR_DEPTH * depth_first))
goto fail_unmap_enomem;
if (pktsze > maxsze)
pktsze = maxsze;
destination ^= 1 << TD_TOKEN_TOGGLE; // toggle DATA0/1
// Status, pktsze bytes of data
fill_td (td, status, destination | ((pktsze - 1) << 21),
urb_priv->transfer_buffer_dma + (data - (char *)urb->transfer_buffer));
insert_td (s, qh, td, UHCI_PTR_DEPTH * depth_first); // queue 'data stage'-td in qh
data += pktsze;
len -= pktsze;
}
/* Build the final TD for control status */
/* It's only IN if the pipe is out AND we aren't expecting data */
destination &= ~UHCI_PID;
if (usb_pipeout (urb->pipe) || (urb->transfer_buffer_length == 0))
destination |= USB_PID_IN;
else
destination |= USB_PID_OUT;
destination |= 1 << TD_TOKEN_TOGGLE; /* End in Data1 */
if (alloc_td (s, &td, UHCI_PTR_DEPTH))
goto fail_unmap_enomem;
status &=~TD_CTRL_SPD;
/* no limit on errors on final packet , 0 bytes of data */
fill_td (td, status | TD_CTRL_IOC, destination | (UHCI_NULL_DATA_SIZE << 21),
0);
insert_td (s, qh, td, UHCI_PTR_DEPTH * depth_first); // queue status td
list_add (&qh->desc_list, &urb_priv->desc_list);
queue_urb (s, urb); // queue before inserting in desc chain
qh->hw.qh.element &= cpu_to_le32(~UHCI_PTR_TERM);
//uhci_show_queue(qh);
/* Start it up... put low speed first */
if (urb->pipe & TD_CTRL_LS)
insert_qh (s, s->control_chain, qh, 0);
else
insert_qh (s, s->bulk_chain, qh, 0);
dbg("uhci_submit_control end");
return 0;
fail_unmap_enomem:
delete_qh(s, qh);
return -ENOMEM;
}
/*-------------------------------------------------------------------*/
// For queued bulk transfers, two additional QH helpers are allocated (nqh, bqh)
// Due to the linking with other bulk urbs, it has to be locked with urb_list_lock!
_static int uhci_submit_bulk_urb (urb_t *urb, urb_t *bulk_urb)
{
uhci_t *s = (uhci_t*) urb->dev->bus->hcpriv;
urb_priv_t *urb_priv = urb->hcpriv, *upriv, *bpriv=NULL;
uhci_desc_t *qh, *td, *nqh=NULL, *bqh=NULL, *first_td=NULL;
unsigned long destination, status;
char *data;
unsigned int pipe = urb->pipe;
int maxsze = usb_maxpacket (urb->dev, pipe, usb_pipeout (pipe));
int info, len, last;
int depth_first=USE_BULK_DEPTH_FIRST; // UHCI descriptor chasing method
if (usb_endpoint_halted (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe)))
return -EPIPE;
queue_dbg("uhci_submit_bulk_urb: urb %p, old %p, pipe %08x, len %i",
urb,bulk_urb,urb->pipe,urb->transfer_buffer_length);
upriv = (urb_priv_t*)urb->hcpriv;
if (!bulk_urb) {
if (alloc_qh (s, &qh)) // get qh for this request
return -ENOMEM;
if (urb->transfer_flags & USB_QUEUE_BULK) {
if (alloc_qh(s, &nqh)) // placeholder for clean unlink
{
delete_desc (s, qh);
return -ENOMEM;
}
upriv->next_qh = nqh;
queue_dbg("new next qh %p",nqh);
}
}
else {
bpriv = (urb_priv_t*)bulk_urb->hcpriv;
qh = bpriv->bottom_qh; // re-use bottom qh and next qh
nqh = bpriv->next_qh;
upriv->next_qh=nqh;
upriv->prev_queued_urb=bulk_urb;
}
if (urb->transfer_flags & USB_QUEUE_BULK) {
if (alloc_qh (s, &bqh)) // "bottom" QH
{
if (!bulk_urb) {
delete_desc(s, qh);
delete_desc(s, nqh);
}
return -ENOMEM;
}
set_qh_element(bqh, UHCI_PTR_TERM);
set_qh_head(bqh, nqh->dma_addr | UHCI_PTR_QH); // element
upriv->bottom_qh = bqh;
}
queue_dbg("uhci_submit_bulk: qh %p bqh %p nqh %p",qh, bqh, nqh);
/* The "pipe" thing contains the destination in bits 8--18. */
destination = (pipe & PIPE_DEVEP_MASK) | usb_packetid (pipe);
/* 3 errors */
status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE |
((urb->transfer_flags & USB_DISABLE_SPD) ? 0 : TD_CTRL_SPD) | (3 << 27);
/* Build the TDs for the bulk request */
len = urb->transfer_buffer_length;
data = urb->transfer_buffer;
do { // TBD: Really allow zero-length packets?
int pktsze = len;
if (alloc_td (s, &td, UHCI_PTR_DEPTH * depth_first))
{
delete_qh (s, qh);
return -ENOMEM;
}
if (pktsze > maxsze)
pktsze = maxsze;
// pktsze bytes of data
info = destination | (((pktsze - 1)&UHCI_NULL_DATA_SIZE) << 21) |
(usb_gettoggle (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe)) << TD_TOKEN_TOGGLE);
fill_td (td, status, info,
urb_priv->transfer_buffer_dma + (data - (char *)urb->transfer_buffer));
data += pktsze;
len -= pktsze;
// Use USB_ZERO_PACKET to finish bulk OUTs always with a zero length packet
last = (len == 0 && (usb_pipein(pipe) || pktsze < maxsze || !(urb->transfer_flags & USB_ZERO_PACKET)));
if (last)
set_td_ioc(td); // last one generates INT
insert_td (s, qh, td, UHCI_PTR_DEPTH * depth_first);
if (!first_td)
first_td=td;
usb_dotoggle (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe));
} while (!last);
if (bulk_urb && bpriv) // everything went OK, link with old bulk URB
bpriv->next_queued_urb=urb;
list_add (&qh->desc_list, &urb_priv->desc_list);
if (urb->transfer_flags & USB_QUEUE_BULK)
append_qh(s, td, bqh, UHCI_PTR_DEPTH * depth_first);
queue_urb_unlocked (s, urb);
if (urb->transfer_flags & USB_QUEUE_BULK)
set_qh_element(qh, first_td->dma_addr);
else
qh->hw.qh.element &= cpu_to_le32(~UHCI_PTR_TERM); // arm QH
if (!bulk_urb) { // new bulk queue
if (urb->transfer_flags & USB_QUEUE_BULK) {
spin_lock (&s->td_lock); // both QHs in one go
insert_qh (s, s->chain_end, qh, 0); // Main QH
insert_qh (s, s->chain_end, nqh, 0); // Helper QH
spin_unlock (&s->td_lock);
}
else
insert_qh (s, s->chain_end, qh, 0);
}
//uhci_show_queue(s->bulk_chain);
//dbg("uhci_submit_bulk_urb: exit\n");
return 0;
}
/*-------------------------------------------------------------------*/
_static void uhci_clean_iso_step1(uhci_t *s, urb_priv_t *urb_priv)
{
struct list_head *p;
uhci_desc_t *td;
for (p = urb_priv->desc_list.next; p != &urb_priv->desc_list; p = p->next) {
td = list_entry (p, uhci_desc_t, desc_list);
unlink_td (s, td, 1);
}
}
/*-------------------------------------------------------------------*/
_static void uhci_clean_iso_step2(uhci_t *s, urb_priv_t *urb_priv)
{
struct list_head *p;
uhci_desc_t *td;
while ((p = urb_priv->desc_list.next) != &urb_priv->desc_list) {
td = list_entry (p, uhci_desc_t, desc_list);
list_del (p);
delete_desc (s, td);
}
}
/*-------------------------------------------------------------------*/
/* mode: CLEAN_TRANSFER_NO_DELETION: unlink but no deletion mark (step 1 of async_unlink)
CLEAN_TRANSFER_REGULAR: regular (unlink/delete-mark)
CLEAN_TRANSFER_DELETION_MARK: deletion mark for QH (step 2 of async_unlink)
looks a bit complicated because of all the bulk queueing goodies
*/
_static void uhci_clean_transfer (uhci_t *s, urb_t *urb, uhci_desc_t *qh, int mode)
{
uhci_desc_t *bqh, *nqh, *prevqh, *prevtd;
int now;
urb_priv_t *priv=(urb_priv_t*)urb->hcpriv;
now=UHCI_GET_CURRENT_FRAME(s);
bqh=priv->bottom_qh;
if (!priv->next_queued_urb) { // no more appended bulk queues
queue_dbg("uhci_clean_transfer: No more bulks for urb %p, qh %p, bqh %p, nqh %p", urb, qh, bqh, priv->next_qh);
if (priv->prev_queued_urb && mode != CLEAN_TRANSFER_DELETION_MARK) { // qh not top of the queue
unsigned long flags;
urb_priv_t* ppriv=(urb_priv_t*)priv->prev_queued_urb->hcpriv;
spin_lock_irqsave (&s->qh_lock, flags);
prevqh = list_entry (ppriv->desc_list.next, uhci_desc_t, desc_list);
prevtd = list_entry (prevqh->vertical.prev, uhci_desc_t, vertical);
set_td_link(prevtd, priv->bottom_qh->dma_addr | UHCI_PTR_QH); // skip current qh
mb();
queue_dbg("uhci_clean_transfer: relink pqh %p, ptd %p",prevqh, prevtd);
spin_unlock_irqrestore (&s->qh_lock, flags);
ppriv->bottom_qh = priv->bottom_qh;
ppriv->next_queued_urb = NULL;
}
else { // queue is dead, qh is top of the queue
if (mode != CLEAN_TRANSFER_DELETION_MARK)
unlink_qh(s, qh); // remove qh from horizontal chain
if (bqh) { // remove remainings of bulk queue
nqh=priv->next_qh;
if (mode != CLEAN_TRANSFER_DELETION_MARK)
unlink_qh(s, nqh); // remove nqh from horizontal chain
if (mode != CLEAN_TRANSFER_NO_DELETION) { // add helper QHs to free desc list
nqh->last_used = bqh->last_used = now;
list_add_tail (&nqh->horizontal, &s->free_desc);
list_add_tail (&bqh->horizontal, &s->free_desc);
}
}
}
}
else { // there are queued urbs following
queue_dbg("uhci_clean_transfer: urb %p, prevurb %p, nexturb %p, qh %p, bqh %p, nqh %p",
urb, priv->prev_queued_urb, priv->next_queued_urb, qh, bqh, priv->next_qh);
if (mode != CLEAN_TRANSFER_DELETION_MARK) { // no work for cleanup at unlink-completion
urb_t *nurb;
unsigned long flags;
nurb = priv->next_queued_urb;
spin_lock_irqsave (&s->qh_lock, flags);
if (!priv->prev_queued_urb) { // top QH
prevqh = list_entry (qh->horizontal.prev, uhci_desc_t, horizontal);
set_qh_head(prevqh, bqh->dma_addr | UHCI_PTR_QH);
list_del (&qh->horizontal); // remove this qh form horizontal chain
list_add (&bqh->horizontal, &prevqh->horizontal); // insert next bqh in horizontal chain
}
else { // intermediate QH
urb_priv_t* ppriv=(urb_priv_t*)priv->prev_queued_urb->hcpriv;
urb_priv_t* npriv=(urb_priv_t*)nurb->hcpriv;
uhci_desc_t * bnqh;
bnqh = list_entry (npriv->desc_list.next, uhci_desc_t, desc_list);
ppriv->bottom_qh = bnqh;
ppriv->next_queued_urb = nurb;
prevqh = list_entry (ppriv->desc_list.next, uhci_desc_t, desc_list);
set_qh_head(prevqh, bqh->dma_addr | UHCI_PTR_QH);
}
mb();
((urb_priv_t*)nurb->hcpriv)->prev_queued_urb=priv->prev_queued_urb;
spin_unlock_irqrestore (&s->qh_lock, flags);
}
}
if (mode != CLEAN_TRANSFER_NO_DELETION) {
qh->last_used = now;
list_add_tail (&qh->horizontal, &s->free_desc); // mark qh for later deletion/kfree
}
}
/*-------------------------------------------------------------------*/
// Release bandwidth for Interrupt or Isoc. transfers
_static void uhci_release_bandwidth(urb_t *urb)
{
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;
}
}
}
_static void uhci_urb_dma_sync(uhci_t *s, urb_t *urb, urb_priv_t *urb_priv)
{
if (urb_priv->setup_packet_dma)
pci_dma_sync_single(s->uhci_pci, urb_priv->setup_packet_dma,
sizeof(devrequest), PCI_DMA_TODEVICE);
if (urb_priv->transfer_buffer_dma)
pci_dma_sync_single(s->uhci_pci, urb_priv->transfer_buffer_dma,
urb->transfer_buffer_length,
usb_pipein(urb->pipe) ?
PCI_DMA_FROMDEVICE :
PCI_DMA_TODEVICE);
}
_static void uhci_urb_dma_unmap(uhci_t *s, urb_t *urb, urb_priv_t *urb_priv)
{
if (urb_priv->setup_packet_dma) {
pci_unmap_single(s->uhci_pci, urb_priv->setup_packet_dma,
sizeof(devrequest), PCI_DMA_TODEVICE);
urb_priv->setup_packet_dma = 0;
}
if (urb_priv->transfer_buffer_dma) {
pci_unmap_single(s->uhci_pci, urb_priv->transfer_buffer_dma,
urb->transfer_buffer_length,
usb_pipein(urb->pipe) ?
PCI_DMA_FROMDEVICE :
PCI_DMA_TODEVICE);
urb_priv->transfer_buffer_dma = 0;
}
}
/*-------------------------------------------------------------------*/
/* needs urb_list_lock!
mode: UNLINK_ASYNC_STORE_URB: unlink and move URB into unlinked list
UNLINK_ASYNC_DONT_STORE: unlink, don't move URB into unlinked list
*/
_static int uhci_unlink_urb_async (uhci_t *s,urb_t *urb, int mode)
{
uhci_desc_t *qh;
urb_priv_t *urb_priv;
async_dbg("unlink_urb_async called %p",urb);
if ((urb->status == -EINPROGRESS) ||
((usb_pipetype (urb->pipe) == PIPE_INTERRUPT) && ((urb_priv_t*)urb->hcpriv)->flags))
{
((urb_priv_t*)urb->hcpriv)->started = ~0; // mark
dequeue_urb (s, urb);
if (mode==UNLINK_ASYNC_STORE_URB)
list_add_tail (&urb->urb_list, &s->urb_unlinked); // store urb
uhci_switch_timer_int(s);
s->unlink_urb_done = 1;
uhci_release_bandwidth(urb);
urb->status = -ECONNABORTED; // mark urb as "waiting to be killed"
urb_priv = (urb_priv_t*)urb->hcpriv;
switch (usb_pipetype (urb->pipe)) {
case PIPE_INTERRUPT:
usb_dotoggle (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe));
case PIPE_ISOCHRONOUS:
uhci_clean_iso_step1 (s, urb_priv);
break;
case PIPE_BULK:
case PIPE_CONTROL:
qh = list_entry (urb_priv->desc_list.next, uhci_desc_t, desc_list);
uhci_clean_transfer (s, urb, qh, CLEAN_TRANSFER_NO_DELETION);
break;
}
((urb_priv_t*)urb->hcpriv)->started = UHCI_GET_CURRENT_FRAME(s);
return -EINPROGRESS; // completion will follow
}
return 0; // URB already dead
}
/*-------------------------------------------------------------------*/
// kills an urb by unlinking descriptors and waiting for at least one frame
_static int uhci_unlink_urb_sync (uhci_t *s, urb_t *urb)
{
uhci_desc_t *qh;
urb_priv_t *urb_priv;
unsigned long flags=0;
struct usb_device *usb_dev;
spin_lock_irqsave (&s->urb_list_lock, flags);
if (urb->status == -EINPROGRESS) {
// move descriptors out the the running chains, dequeue urb
uhci_unlink_urb_async(s, urb, UNLINK_ASYNC_DONT_STORE);
urb_priv = urb->hcpriv;
urb->status = -ENOENT; // prevent from double deletion after unlock
spin_unlock_irqrestore (&s->urb_list_lock, flags);
// cleanup the rest
switch (usb_pipetype (urb->pipe)) {
case PIPE_INTERRUPT:
case PIPE_ISOCHRONOUS:
uhci_wait_ms(1);
uhci_clean_iso_step2(s, urb_priv);
break;
case PIPE_BULK:
case PIPE_CONTROL:
qh = list_entry (urb_priv->desc_list.next, uhci_desc_t, desc_list);
uhci_clean_transfer(s, urb, qh, CLEAN_TRANSFER_DELETION_MARK);
uhci_wait_ms(1);
}
urb->status = -ENOENT; // mark urb as killed
uhci_urb_dma_unmap(s, urb, urb->hcpriv);
#ifdef DEBUG_SLAB
kmem_cache_free (urb_priv_kmem, urb->hcpriv);
#else
kfree (urb->hcpriv);
#endif
usb_dev = urb->dev;
if (urb->complete) {
dbg("unlink_urb: calling completion");
urb->dev = NULL;
urb->complete ((struct urb *) urb);
}
usb_dec_dev_use (usb_dev);
}
else
spin_unlock_irqrestore (&s->urb_list_lock, flags);
return 0;
}
/*-------------------------------------------------------------------*/
// async unlink_urb completion/cleanup work
// has to be protected by urb_list_lock!
// features: if set in transfer_flags, the resulting status of the killed
// transaction is not overwritten
_static void uhci_cleanup_unlink(uhci_t *s, int force)
{
struct list_head *q;
urb_t *urb;
struct usb_device *dev;
int now, type;
urb_priv_t *urb_priv;
q=s->urb_unlinked.next;
now=UHCI_GET_CURRENT_FRAME(s);
while (q != &s->urb_unlinked) {
urb = list_entry (q, urb_t, urb_list);
urb_priv = (urb_priv_t*)urb->hcpriv;
q = urb->urb_list.next;
if (!urb_priv) // avoid crash when URB is corrupted
break;
if (force || ((urb_priv->started != ~0) && (urb_priv->started != now))) {
async_dbg("async cleanup %p",urb);
type=usb_pipetype (urb->pipe);
switch (type) { // process descriptors
case PIPE_CONTROL:
process_transfer (s, urb, CLEAN_TRANSFER_DELETION_MARK); // don't unlink (already done)
break;
case PIPE_BULK:
if (!s->avoid_bulk.counter)
process_transfer (s, urb, CLEAN_TRANSFER_DELETION_MARK); // don't unlink (already done)
else
continue;
break;
case PIPE_ISOCHRONOUS:
process_iso (s, urb, PROCESS_ISO_FORCE); // force, don't unlink
break;
case PIPE_INTERRUPT:
process_interrupt (s, urb);
break;
}
if (!(urb->transfer_flags & USB_TIMEOUT_KILLED))
urb->status = -ECONNRESET; // mark as asynchronously killed
dev = urb->dev; // completion may destroy all...
urb_priv = urb->hcpriv;
list_del (&urb->urb_list);
uhci_urb_dma_sync(s, urb, urb_priv);
if (urb->complete) {
spin_unlock(&s->urb_list_lock);
urb->dev = NULL;
urb->complete ((struct urb *) urb);
spin_lock(&s->urb_list_lock);
}
if (!(urb->transfer_flags & USB_TIMEOUT_KILLED))
urb->status = -ENOENT; // now the urb is really dead
switch (type) {
case PIPE_ISOCHRONOUS:
case PIPE_INTERRUPT:
uhci_clean_iso_step2(s, urb_priv);
break;
}
uhci_urb_dma_unmap(s, urb, urb_priv);
usb_dec_dev_use (dev);
#ifdef DEBUG_SLAB
kmem_cache_free (urb_priv_kmem, urb_priv);
#else
kfree (urb_priv);
#endif
}
}
}
/*-------------------------------------------------------------------*/
_static int uhci_unlink_urb (urb_t *urb)
{
uhci_t *s;
unsigned long flags=0;
dbg("uhci_unlink_urb called for %p",urb);
if (!urb || !urb->dev) // you never know...
return -EINVAL;
s = (uhci_t*) urb->dev->bus->hcpriv;
if (usb_pipedevice (urb->pipe) == s->rh.devnum)
return rh_unlink_urb (urb);
if (!urb->hcpriv)
return -EINVAL;
if (urb->transfer_flags & USB_ASYNC_UNLINK) {
int ret;
spin_lock_irqsave (&s->urb_list_lock, flags);
uhci_release_bandwidth(urb);
ret = uhci_unlink_urb_async(s, urb, UNLINK_ASYNC_STORE_URB);
spin_unlock_irqrestore (&s->urb_list_lock, flags);
return ret;
}
else
return uhci_unlink_urb_sync(s, urb);
}
/*-------------------------------------------------------------------*/
// In case of ASAP iso transfer, search the URB-list for already queued URBs
// for this EP and calculate the earliest start frame for the new
// URB (easy seamless URB continuation!)
_static int find_iso_limits (urb_t *urb, unsigned int *start, unsigned int *end)
{
urb_t *u, *last_urb = NULL;
uhci_t *s = (uhci_t*) urb->dev->bus->hcpriv;
struct list_head *p;
int ret=-1;
unsigned long flags;
spin_lock_irqsave (&s->urb_list_lock, flags);
p=s->urb_list.prev;
for (; p != &s->urb_list; p = p->prev) {
u = list_entry (p, urb_t, urb_list);
// look for pending URBs with identical pipe handle
// works only because iso doesn't toggle the data bit!
if ((urb->pipe == u->pipe) && (urb->dev == u->dev) && (u->status == -EINPROGRESS)) {
if (!last_urb)
*start = u->start_frame;
last_urb = u;
}
}
if (last_urb) {
*end = (last_urb->start_frame + last_urb->number_of_packets) & 1023;
ret=0;
}
spin_unlock_irqrestore(&s->urb_list_lock, flags);
return ret;
}
/*-------------------------------------------------------------------*/
// adjust start_frame according to scheduling constraints (ASAP etc)
_static int iso_find_start (urb_t *urb)
{
uhci_t *s = (uhci_t*) urb->dev->bus->hcpriv;
unsigned int now;
unsigned int start_limit = 0, stop_limit = 0, queued_size;
int limits;
now = UHCI_GET_CURRENT_FRAME (s) & 1023;
if ((unsigned) urb->number_of_packets > 900)
return -EFBIG;
limits = find_iso_limits (urb, &start_limit, &stop_limit);
queued_size = (stop_limit - start_limit) & 1023;
if (urb->transfer_flags & USB_ISO_ASAP) {
// first iso
if (limits) {
// 10ms setup should be enough //FIXME!
urb->start_frame = (now + 10) & 1023;
}
else {
urb->start_frame = stop_limit; //seamless linkage
if (((now - urb->start_frame) & 1023) <= (unsigned) urb->number_of_packets) {
info("iso_find_start: gap in seamless isochronous scheduling");
dbg("iso_find_start: now %u start_frame %u number_of_packets %u pipe 0x%08x",
now, urb->start_frame, urb->number_of_packets, urb->pipe);
urb->start_frame = (now + 5) & 1023; // 5ms setup should be enough //FIXME!
}
}
}
else {
urb->start_frame &= 1023;
if (((now - urb->start_frame) & 1023) < (unsigned) urb->number_of_packets) {
dbg("iso_find_start: now between start_frame and end");
return -EAGAIN;
}
}
/* check if either start_frame or start_frame+number_of_packets-1 lies between start_limit and stop_limit */
if (limits)
return 0;
if (((urb->start_frame - start_limit) & 1023) < queued_size ||
((urb->start_frame + urb->number_of_packets - 1 - start_limit) & 1023) < queued_size) {
dbg("iso_find_start: start_frame %u number_of_packets %u start_limit %u stop_limit %u",
urb->start_frame, urb->number_of_packets, start_limit, stop_limit);
return -EAGAIN;
}
return 0;
}
/*-------------------------------------------------------------------*/
// submits USB interrupt (ie. polling ;-)
// ASAP-flag set implicitely
// if period==0, the transfer is only done once
_static int uhci_submit_int_urb (urb_t *urb)
{
uhci_t *s = (uhci_t*) urb->dev->bus->hcpriv;
urb_priv_t *urb_priv = urb->hcpriv;
int nint, n;
uhci_desc_t *td;
int status, destination;
int info;
unsigned int pipe = urb->pipe;
if (urb->interval < 0 || urb->interval >= 256)
return -EINVAL;
if (urb->interval == 0)
nint = 0;
else {
for (nint = 0, n = 1; nint <= 8; nint++, n += n) // round interval down to 2^n
{
if (urb->interval < n) {
urb->interval = n / 2;
break;
}
}
nint--;
}
dbg("Rounded interval to %i, chain %i", urb->interval, nint);
urb->start_frame = UHCI_GET_CURRENT_FRAME (s) & 1023; // remember start frame, just in case...
urb->number_of_packets = 1;
// INT allows only one packet
if (urb->transfer_buffer_length > usb_maxpacket (urb->dev, pipe, usb_pipeout (pipe)))
return -EINVAL;
if (alloc_td (s, &td, UHCI_PTR_DEPTH))
return -ENOMEM;
status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | TD_CTRL_IOC |
(urb->transfer_flags & USB_DISABLE_SPD ? 0 : TD_CTRL_SPD) | (3 << 27);
destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid (urb->pipe) |
(((urb->transfer_buffer_length - 1) & 0x7ff) << 21);
info = destination | (usb_gettoggle (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe)) << TD_TOKEN_TOGGLE);
fill_td (td, status, info, urb_priv->transfer_buffer_dma);
list_add_tail (&td->desc_list, &urb_priv->desc_list);
queue_urb (s, urb);
insert_td_horizontal (s, s->int_chain[nint], td); // store in INT-TDs
usb_dotoggle (urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe));
return 0;
}
/*-------------------------------------------------------------------*/
_static int uhci_submit_iso_urb (urb_t *urb)
{
uhci_t *s = (uhci_t*) urb->dev->bus->hcpriv;
urb_priv_t *urb_priv = urb->hcpriv;
#ifdef ISO_SANITY_CHECK
int pipe=urb->pipe;
int maxsze = usb_maxpacket (urb->dev, pipe, usb_pipeout (pipe));
#endif
int n, ret, last=0;
uhci_desc_t *td, **tdm;
int status, destination;
unsigned long flags;
__save_flags(flags);
__cli(); // Disable IRQs to schedule all ISO-TDs in time
ret = iso_find_start (urb); // adjusts urb->start_frame for later use
if (ret)
goto err;
tdm = (uhci_desc_t **) kmalloc (urb->number_of_packets * sizeof (uhci_desc_t*), KMALLOC_FLAG);
if (!tdm) {
ret = -ENOMEM;
goto err;
}
memset(tdm, 0, urb->number_of_packets * sizeof (uhci_desc_t*));
// First try to get all TDs. Cause: Removing already inserted TDs can only be done
// racefree in three steps: unlink TDs, wait one frame, delete TDs.
// So, this solutions seems simpler...
for (n = 0; n < urb->number_of_packets; n++) {
dbg("n:%d urb->iso_frame_desc[n].length:%d", n, urb->iso_frame_desc[n].length);
if (!urb->iso_frame_desc[n].length)
continue; // allows ISO striping by setting length to zero in iso_descriptor
#ifdef ISO_SANITY_CHECK
if(urb->iso_frame_desc[n].length > maxsze) {
err("submit_iso: urb->iso_frame_desc[%d].length(%d)>%d",n , urb->iso_frame_desc[n].length, maxsze);
ret=-EINVAL;
}
else
#endif
if (alloc_td (s, &td, UHCI_PTR_DEPTH)) {
int i; // Cleanup allocated TDs
for (i = 0; i < n; n++)
if (tdm[i])
delete_desc(s, tdm[i]);
kfree (tdm);
goto err;
}
last=n;
tdm[n] = td;
}
status = TD_CTRL_ACTIVE | TD_CTRL_IOS;
destination = (urb->pipe & PIPE_DEVEP_MASK) | usb_packetid (urb->pipe);
// Queue all allocated TDs
for (n = 0; n < urb->number_of_packets; n++) {
td = tdm[n];
if (!td)
continue;
if (n == last) {
status |= TD_CTRL_IOC;
queue_urb (s, urb);
}
fill_td (td, status, destination | (((urb->iso_frame_desc[n].length - 1) & 0x7ff) << 21),
urb_priv->transfer_buffer_dma + urb->iso_frame_desc[n].offset);
list_add_tail (&td->desc_list, &urb_priv->desc_list);
insert_td_horizontal (s, s->iso_td[(urb->start_frame + n) & 1023], td); // store in iso-tds
}
kfree (tdm);
dbg("ISO-INT# %i, start %i, now %i", urb->number_of_packets, urb->start_frame, UHCI_GET_CURRENT_FRAME (s) & 1023);
ret = 0;
err:
__restore_flags(flags);
return ret;
}
/*-------------------------------------------------------------------*/
// returns: 0 (no transfer queued), urb* (this urb already queued)
_static urb_t* search_dev_ep (uhci_t *s, urb_t *urb)
{
struct list_head *p;
urb_t *tmp;
unsigned int mask = usb_pipecontrol(urb->pipe) ? (~USB_DIR_IN) : (~0);
dbg("search_dev_ep:");
p=s->urb_list.next;
for (; p != &s->urb_list; p = p->next) {
tmp = list_entry (p, urb_t, urb_list);
dbg("urb: %p", tmp);
// we can accept this urb if it is not queued at this time
// or if non-iso transfer requests should be scheduled for the same device and pipe
if ((!usb_pipeisoc(urb->pipe) && (tmp->dev == urb->dev) && !((tmp->pipe ^ urb->pipe) & mask)) ||
(urb == tmp)) {
return tmp; // found another urb already queued for processing
}
}
return 0;
}
/*-------------------------------------------------------------------*/
_static int uhci_submit_urb (urb_t *urb)
{
uhci_t *s;
urb_priv_t *urb_priv;
int ret = 0, type;
unsigned long flags;
urb_t *queued_urb=NULL;
int bustime;
if (!urb->dev || !urb->dev->bus)
return -ENODEV;
s = (uhci_t*) urb->dev->bus->hcpriv;
//dbg("submit_urb: %p type %d",urb,usb_pipetype(urb->pipe));
if (!s->running)
return -ENODEV;
type = usb_pipetype (urb->pipe);
if (usb_pipedevice (urb->pipe) == s->rh.devnum)
return rh_submit_urb (urb); /* virtual root hub */
// Sanity checks
if (usb_maxpacket (urb->dev, urb->pipe, usb_pipeout (urb->pipe)) <= 0) {
err("uhci_submit_urb: pipesize for pipe %x is zero", urb->pipe);
return -EMSGSIZE;
}
if (urb->transfer_buffer_length < 0 && type != PIPE_ISOCHRONOUS) {
err("uhci_submit_urb: Negative transfer length for urb %p", urb);
return -EINVAL;
}
usb_inc_dev_use (urb->dev);
spin_lock_irqsave (&s->urb_list_lock, flags);
queued_urb = search_dev_ep (s, urb); // returns already queued urb for that pipe
if (queued_urb) {
queue_dbg("found bulk urb %p\n", queued_urb);
if (( type != PIPE_BULK) ||
((type == PIPE_BULK) &&
(!(urb->transfer_flags & USB_QUEUE_BULK) || !(queued_urb->transfer_flags & USB_QUEUE_BULK)))) {
spin_unlock_irqrestore (&s->urb_list_lock, flags);
usb_dec_dev_use (urb->dev);
err("ENXIO %08x, flags %x, urb %p, burb %p",urb->pipe,urb->transfer_flags,urb,queued_urb);
return -ENXIO; // urb already queued
}
}
#ifdef DEBUG_SLAB
urb_priv = kmem_cache_alloc(urb_priv_kmem, SLAB_FLAG);
#else
urb_priv = kmalloc (sizeof (urb_priv_t), KMALLOC_FLAG);
#endif
if (!urb_priv) {
usb_dec_dev_use (urb->dev);
spin_unlock_irqrestore (&s->urb_list_lock, flags);
return -ENOMEM;
}
memset(urb_priv, 0, sizeof(urb_priv_t));
urb->hcpriv = urb_priv;
INIT_LIST_HEAD (&urb_priv->desc_list);
dbg("submit_urb: scheduling %p", urb);
if (type == PIPE_CONTROL)
urb_priv->setup_packet_dma = pci_map_single(s->uhci_pci, urb->setup_packet,
sizeof(devrequest), PCI_DMA_TODEVICE);
if (urb->transfer_buffer_length)
urb_priv->transfer_buffer_dma = pci_map_single(s->uhci_pci,
urb->transfer_buffer,
urb->transfer_buffer_length,
usb_pipein(urb->pipe) ?
PCI_DMA_FROMDEVICE :
PCI_DMA_TODEVICE);
if (type == PIPE_BULK) {
if (queued_urb) {
while (((urb_priv_t*)queued_urb->hcpriv)->next_queued_urb) // find last queued bulk
queued_urb=((urb_priv_t*)queued_urb->hcpriv)->next_queued_urb;
((urb_priv_t*)queued_urb->hcpriv)->next_queued_urb=urb;
}
atomic_inc (&s->avoid_bulk);
ret = uhci_submit_bulk_urb (urb, queued_urb);
atomic_dec (&s->avoid_bulk);
spin_unlock_irqrestore (&s->urb_list_lock, flags);
}
else {
spin_unlock_irqrestore (&s->urb_list_lock, flags);
switch (type) {
case PIPE_ISOCHRONOUS:
if (urb->bandwidth == 0) { /* not yet checked/allocated */
if (urb->number_of_packets <= 0) {
ret = -EINVAL;
break;
}
bustime = usb_check_bandwidth (urb->dev, urb);
if (bustime < 0)
ret = bustime;
else {
ret = uhci_submit_iso_urb(urb);
if (ret == 0)
usb_claim_bandwidth (urb->dev, urb, bustime, 1);
}
} else { /* bandwidth is already set */
ret = uhci_submit_iso_urb(urb);
}
break;
case PIPE_INTERRUPT:
if (urb->bandwidth == 0) { /* not yet checked/allocated */
bustime = usb_check_bandwidth (urb->dev, urb);
if (bustime < 0)
ret = bustime;
else {
ret = uhci_submit_int_urb(urb);
if (ret == 0)
usb_claim_bandwidth (urb->dev, urb, bustime, 0);
}
} else { /* bandwidth is already set */
ret = uhci_submit_int_urb(urb);
}
break;
case PIPE_CONTROL:
ret = uhci_submit_control_urb (urb);
break;
default:
ret = -EINVAL;
}
}
dbg("submit_urb: scheduled with ret: %d", ret);
if (ret != 0) {
uhci_urb_dma_unmap(s, urb, urb_priv);
usb_dec_dev_use (urb->dev);
#ifdef DEBUG_SLAB
kmem_cache_free(urb_priv_kmem, urb_priv);
#else
kfree (urb_priv);
#endif
return ret;
}
return 0;
}
// Checks for URB timeout and removes bandwidth reclamation if URB idles too long
_static void uhci_check_timeouts(uhci_t *s)
{
struct list_head *p,*p2;
urb_t *urb;
int type;
p = s->urb_list.prev;
while (p != &s->urb_list) {
urb_priv_t *hcpriv;
p2 = p;
p = p->prev;
urb = list_entry (p2, urb_t, urb_list);
type = usb_pipetype (urb->pipe);
hcpriv = (urb_priv_t*)urb->hcpriv;
if ( urb->timeout && time_after(jiffies, hcpriv->started + urb->timeout)) {
urb->transfer_flags |= USB_TIMEOUT_KILLED | USB_ASYNC_UNLINK;
async_dbg("uhci_check_timeout: timeout for %p",urb);
uhci_unlink_urb_async(s, urb, UNLINK_ASYNC_STORE_URB);
}
#ifdef CONFIG_USB_UHCI_HIGH_BANDWIDTH
else if (((type == PIPE_BULK) || (type == PIPE_CONTROL)) &&
(hcpriv->use_loop) && time_after(jiffies, hcpriv->started + IDLE_TIMEOUT))
disable_desc_loop(s, urb);
#endif
}
s->timeout_check=jiffies;
}
/*-------------------------------------------------------------------
Virtual Root Hub
-------------------------------------------------------------------*/
_static __u8 root_hub_dev_des[] =
{
0x12, /* __u8 bLength; */
0x01, /* __u8 bDescriptorType; Device */
0x00, /* __u16 bcdUSB; v1.0 */
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 */
0x08, /* __u16 ep_wMaxPacketSize; 8 Bytes */
0x00,
0xff /* __u8 ep_bInterval; 255 ms */
};
_static __u8 root_hub_hub_des[] =
{
0x09, /* __u8 bLength; */
0x29, /* __u8 bDescriptorType; Hub-descriptor */
0x02, /* __u8 bNbrPorts; */
0x00, /* __u16 wHubCharacteristics; */
0x00,
0x01, /* __u8 bPwrOn2pwrGood; 2ms */
0x00, /* __u8 bHubContrCurrent; 0 mA */
0x00, /* __u8 DeviceRemovable; *** 7 Ports max *** */
0xff /* __u8 PortPwrCtrlMask; *** 7 ports max *** */
};
/*-------------------------------------------------------------------------*/
/* prepare Interrupt pipe transaction data; HUB INTERRUPT ENDPOINT */
_static int rh_send_irq (urb_t *urb)
{
int len = 1;
int i;
uhci_t *uhci = urb->dev->bus->hcpriv;
unsigned int io_addr = uhci->io_addr;
__u16 data = 0;
for (i = 0; i < uhci->rh.numports; i++) {
data |= ((inw (io_addr + USBPORTSC1 + i * 2) & 0xa) > 0 ? (1 << (i + 1)) : 0);
len = (i + 1) / 8 + 1;
}
*(__u16 *) urb->transfer_buffer = cpu_to_le16 (data);
urb->actual_length = len;
urb->status = 0;
if ((data > 0) && (uhci->rh.send != 0)) {
dbg("Root-Hub INT complete: port1: %x port2: %x data: %x",
inw (io_addr + USBPORTSC1), inw (io_addr + USBPORTSC2), data);
urb->complete (urb);
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* Virtual Root Hub INTs are polled by this timer every "intervall" ms */
_static int rh_init_int_timer (urb_t *urb);
_static void rh_int_timer_do (unsigned long ptr)
{
int len;
urb_t *urb = (urb_t*) ptr;
uhci_t *uhci = urb->dev->bus->hcpriv;
if (uhci->rh.send) {
len = rh_send_irq (urb);
if (len > 0) {
urb->actual_length = len;
if (urb->complete)
urb->complete (urb);
}
}
rh_init_int_timer (urb);
}
/*-------------------------------------------------------------------------*/
/* Root Hub INTs are polled by this timer, polling interval 20ms */
_static int rh_init_int_timer (urb_t *urb)
{
uhci_t *uhci = urb->dev->bus->hcpriv;
uhci->rh.interval = urb->interval;
init_timer (&uhci->rh.rh_int_timer);
uhci->rh.rh_int_timer.function = rh_int_timer_do;
uhci->rh.rh_int_timer.data = (unsigned long) urb;
uhci->rh.rh_int_timer.expires = jiffies + (HZ * 20) / 1000;
add_timer (&uhci->rh.rh_int_timer);
return 0;
}
/*-------------------------------------------------------------------------*/
#define OK(x) len = (x); break
#define CLR_RH_PORTSTAT(x) \
status = inw(io_addr+USBPORTSC1+2*(wIndex-1)); \
status = (status & 0xfff5) & ~(x); \
outw(status, io_addr+USBPORTSC1+2*(wIndex-1))
#define SET_RH_PORTSTAT(x) \
status = inw(io_addr+USBPORTSC1+2*(wIndex-1)); \
status = (status & 0xfff5) | (x); \
outw(status, io_addr+USBPORTSC1+2*(wIndex-1))
/*-------------------------------------------------------------------------*/
/****
** Root Hub Control Pipe
*************************/
_static int rh_submit_urb (urb_t *urb)
{
struct usb_device *usb_dev = urb->dev;
uhci_t *uhci = usb_dev->bus->hcpriv;
unsigned int pipe = urb->pipe;
devrequest *cmd = (devrequest *) urb->setup_packet;
void *data = urb->transfer_buffer;
int leni = urb->transfer_buffer_length;
int len = 0;
int status = 0;
int stat = 0;
int i;
unsigned int io_addr = uhci->io_addr;
__u16 cstatus;
__u16 bmRType_bReq;
__u16 wValue;
__u16 wIndex;
__u16 wLength;
if (usb_pipetype (pipe) == PIPE_INTERRUPT) {
dbg("Root-Hub submit IRQ: every %d ms", urb->interval);
uhci->rh.urb = urb;
uhci->rh.send = 1;
uhci->rh.interval = urb->interval;
rh_init_int_timer (urb);
return 0;
}
bmRType_bReq = cmd->requesttype | cmd->request << 8;
wValue = le16_to_cpu (cmd->value);
wIndex = le16_to_cpu (cmd->index);
wLength = le16_to_cpu (cmd->length);
for (i = 0; i < 8; i++)
uhci->rh.c_p_r[i] = 0;
dbg("Root-Hub: adr: %2x cmd(%1x): %04x %04x %04x %04x",
uhci->rh.devnum, 8, bmRType_bReq, wValue, wIndex, 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 = cpu_to_le16 (1);
OK (2);
case RH_GET_STATUS | RH_INTERFACE:
*(__u16 *) data = cpu_to_le16 (0);
OK (2);
case RH_GET_STATUS | RH_ENDPOINT:
*(__u16 *) data = cpu_to_le16 (0);
OK (2);
case RH_GET_STATUS | RH_CLASS:
*(__u32 *) data = cpu_to_le32 (0);
OK (4); /* hub power ** */
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
status = inw (io_addr + USBPORTSC1 + 2 * (wIndex - 1));
cstatus = ((status & USBPORTSC_CSC) >> (1 - 0)) |
((status & USBPORTSC_PEC) >> (3 - 1)) |
(uhci->rh.c_p_r[wIndex - 1] << (0 + 4));
status = (status & USBPORTSC_CCS) |
((status & USBPORTSC_PE) >> (2 - 1)) |
((status & USBPORTSC_SUSP) >> (12 - 2)) |
((status & USBPORTSC_PR) >> (9 - 4)) |
(1 << 8) | /* power on ** */
((status & USBPORTSC_LSDA) << (-8 + 9));
*(__u16 *) data = cpu_to_le16 (status);
*(__u16 *) (data + 2) = cpu_to_le16 (cstatus);
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_OVER_CURRENT):
OK (0); /* hub power over current ** */
}
break;
case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_ENABLE):
CLR_RH_PORTSTAT (USBPORTSC_PE);
OK (0);
case (RH_PORT_SUSPEND):
CLR_RH_PORTSTAT (USBPORTSC_SUSP);
OK (0);
case (RH_PORT_POWER):
OK (0); /* port power ** */
case (RH_C_PORT_CONNECTION):
SET_RH_PORTSTAT (USBPORTSC_CSC);
OK (0);
case (RH_C_PORT_ENABLE):
SET_RH_PORTSTAT (USBPORTSC_PEC);
OK (0);
case (RH_C_PORT_SUSPEND):
/*** WR_RH_PORTSTAT(RH_PS_PSSC); */
OK (0);
case (RH_C_PORT_OVER_CURRENT):
OK (0); /* port power over current ** */
case (RH_C_PORT_RESET):
uhci->rh.c_p_r[wIndex - 1] = 0;
OK (0);
}
break;
case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_SUSPEND):
SET_RH_PORTSTAT (USBPORTSC_SUSP);
OK (0);
case (RH_PORT_RESET):
SET_RH_PORTSTAT (USBPORTSC_PR);
uhci_wait_ms (10);
uhci->rh.c_p_r[wIndex - 1] = 1;
CLR_RH_PORTSTAT (USBPORTSC_PR);
udelay (10);
SET_RH_PORTSTAT (USBPORTSC_PE);
uhci_wait_ms (10);
SET_RH_PORTSTAT (0xa);
OK (0);
case (RH_PORT_POWER):
OK (0); /* port power ** */
case (RH_PORT_ENABLE):
SET_RH_PORTSTAT (USBPORTSC_PE);
OK (0);
}
break;
case RH_SET_ADDRESS:
uhci->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));
memcpy (data, root_hub_dev_des, len);
OK (len);
case (0x02): /* configuration descriptor */
len = min_t(unsigned int, leni,
min_t(unsigned int,
sizeof (root_hub_config_des), wLength));
memcpy (data, root_hub_config_des, len);
OK (len);
case (0x03): /* string descriptors */
len = usb_root_hub_string (wValue & 0xff,
uhci->io_addr, "UHCI",
data, wLength);
if (len > 0) {
OK(min_t(int, leni, len));
} else
stat = -EPIPE;
}
break;
case RH_GET_DESCRIPTOR | RH_CLASS:
root_hub_hub_des[2] = uhci->rh.numports;
len = min_t(unsigned int, leni,
min_t(unsigned int, sizeof (root_hub_hub_des), wLength));
memcpy (data, root_hub_hub_des, len);
OK (len);
case RH_GET_CONFIGURATION:
*(__u8 *) data = 0x01;
OK (1);
case RH_SET_CONFIGURATION:
OK (0);
default:
stat = -EPIPE;
}
dbg("Root-Hub stat port1: %x port2: %x",
inw (io_addr + USBPORTSC1), inw (io_addr + USBPORTSC2));
urb->actual_length = len;
urb->status = stat;
urb->dev=NULL;
if (urb->complete)
urb->complete (urb);
return 0;
}
/*-------------------------------------------------------------------------*/
_static int rh_unlink_urb (urb_t *urb)
{
uhci_t *uhci = urb->dev->bus->hcpriv;
if (uhci->rh.urb==urb) {
dbg("Root-Hub unlink IRQ");
uhci->rh.send = 0;
del_timer (&uhci->rh.rh_int_timer);
}
return 0;
}
/*-------------------------------------------------------------------*/
/*
* Map status to standard result codes
*
* <status> is (td->status & 0xFE0000) [a.k.a. uhci_status_bits(td->status)
* <dir_out> is True for output TDs and False for input TDs.
*/
_static int uhci_map_status (int status, int dir_out)
{
if (!status)
return 0;
if (status & TD_CTRL_BITSTUFF) /* Bitstuff error */
return -EPROTO;
if (status & TD_CTRL_CRCTIMEO) { /* CRC/Timeout */
if (dir_out)
return -ETIMEDOUT;
else
return -EILSEQ;
}
if (status & TD_CTRL_NAK) /* NAK */
return -ETIMEDOUT;
if (status & TD_CTRL_BABBLE) /* Babble */
return -EOVERFLOW;
if (status & TD_CTRL_DBUFERR) /* Buffer error */
return -ENOSR;
if (status & TD_CTRL_STALLED) /* Stalled */
return -EPIPE;
if (status & TD_CTRL_ACTIVE) /* Active */
return 0;
return -EPROTO;
}
/*
* Only the USB core should call uhci_alloc_dev and uhci_free_dev
*/
_static int uhci_alloc_dev (struct usb_device *usb_dev)
{
return 0;
}
_static void uhci_unlink_urbs(uhci_t *s, struct usb_device *usb_dev, int remove_all)
{
unsigned long flags;
struct list_head *p;
struct list_head *p2;
urb_t *urb;
spin_lock_irqsave (&s->urb_list_lock, flags);
p = s->urb_list.prev;
while (p != &s->urb_list) {
p2 = p;
p = p->prev ;
urb = list_entry (p2, urb_t, urb_list);
dbg("urb: %p, dev %p, %p", urb, usb_dev,urb->dev);
//urb->transfer_flags |=USB_ASYNC_UNLINK;
if (remove_all || (usb_dev == urb->dev)) {
spin_unlock_irqrestore (&s->urb_list_lock, flags);
warn("forced removing of queued URB %p due to disconnect",urb);
uhci_unlink_urb(urb);
urb->dev = NULL; // avoid further processing of this URB
spin_lock_irqsave (&s->urb_list_lock, flags);
p = s->urb_list.prev;
}
}
spin_unlock_irqrestore (&s->urb_list_lock, flags);
}
_static int uhci_free_dev (struct usb_device *usb_dev)
{
uhci_t *s;
if(!usb_dev || !usb_dev->bus || !usb_dev->bus->hcpriv)
return -EINVAL;
s=(uhci_t*) usb_dev->bus->hcpriv;
uhci_unlink_urbs(s, usb_dev, 0);
return 0;
}
/*
* uhci_get_current_frame_number()
*
* returns the current frame number for a USB bus/controller.
*/
_static int uhci_get_current_frame_number (struct usb_device *usb_dev)
{
return UHCI_GET_CURRENT_FRAME ((uhci_t*) usb_dev->bus->hcpriv);
}
struct usb_operations uhci_device_operations =
{
uhci_alloc_dev,
uhci_free_dev,
uhci_get_current_frame_number,
uhci_submit_urb,
uhci_unlink_urb
};
_static void correct_data_toggles(urb_t *urb)
{
usb_settoggle (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe),
!usb_gettoggle (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe)));
while(urb) {
urb_priv_t *priv=urb->hcpriv;
uhci_desc_t *qh = list_entry (priv->desc_list.next, uhci_desc_t, desc_list);
struct list_head *p = qh->vertical.next;
uhci_desc_t *td;
dbg("URB to correct %p\n", urb);
for (; p != &qh->vertical; p = p->next) {
td = list_entry (p, uhci_desc_t, vertical);
td->hw.td.info^=cpu_to_le32(1<<TD_TOKEN_TOGGLE);
}
urb=priv->next_queued_urb;
}
}
/*
* For IN-control transfers, process_transfer gets a bit more complicated,
* since there are devices that return less data (eg. strings) than they
* have announced. This leads to a queue abort due to the short packet,
* the status stage is not executed. If this happens, the status stage
* is manually re-executed.
* mode: PROCESS_TRANSFER_REGULAR: regular (unlink QH)
* PROCESS_TRANSFER_DONT_UNLINK: QHs already unlinked (for async unlink_urb)
*/
_static int process_transfer (uhci_t *s, urb_t *urb, int mode)
{
int ret = 0;
urb_priv_t *urb_priv = urb->hcpriv;
struct list_head *qhl = urb_priv->desc_list.next;
uhci_desc_t *qh = list_entry (qhl, uhci_desc_t, desc_list);
struct list_head *p = qh->vertical.next;
uhci_desc_t *desc= list_entry (urb_priv->desc_list.prev, uhci_desc_t, desc_list);
uhci_desc_t *last_desc = list_entry (desc->vertical.prev, uhci_desc_t, vertical);
int data_toggle = usb_gettoggle (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe)); // save initial data_toggle
int maxlength; // extracted and remapped info from TD
int actual_length;
int status = 0;
//dbg("process_transfer: urb %p, urb_priv %p, qh %p last_desc %p\n",urb,urb_priv, qh, last_desc);
/* if the status phase has been retriggered and the
queue is empty or the last status-TD is inactive, the retriggered
status stage is completed
*/
if (urb_priv->flags &&
((qh->hw.qh.element == cpu_to_le32(UHCI_PTR_TERM)) || !is_td_active(desc)))
goto transfer_finished;
urb->actual_length=0;
for (; p != &qh->vertical; p = p->next) {
desc = list_entry (p, uhci_desc_t, vertical);
if (is_td_active(desc)) { // do not process active TDs
if (mode == CLEAN_TRANSFER_DELETION_MARK) // if called from async_unlink
uhci_clean_transfer(s, urb, qh, CLEAN_TRANSFER_DELETION_MARK);
return ret;
}
actual_length = uhci_actual_length(le32_to_cpu(desc->hw.td.status)); // extract transfer parameters from TD
maxlength = (((le32_to_cpu(desc->hw.td.info) >> 21) & 0x7ff) + 1) & 0x7ff;
status = uhci_map_status (uhci_status_bits (le32_to_cpu(desc->hw.td.status)), usb_pipeout (urb->pipe));
if (status == -EPIPE) { // see if EP is stalled
// set up stalled condition
usb_endpoint_halt (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe));
}
if (status && (status != -EPIPE)) { // if any error occurred stop processing of further TDs
// only set ret if status returned an error
is_error:
ret = status;
urb->error_count++;
break;
}
else if ((le32_to_cpu(desc->hw.td.info) & 0xff) != USB_PID_SETUP)
urb->actual_length += actual_length;
// got less data than requested
if ( (actual_length < maxlength)) {
if (urb->transfer_flags & USB_DISABLE_SPD) {
status = -EREMOTEIO; // treat as real error
dbg("process_transfer: SPD!!");
break; // exit after this TD because SP was detected
}
// short read during control-IN: re-start status stage
if ((usb_pipetype (urb->pipe) == PIPE_CONTROL)) {
if (uhci_packetid(le32_to_cpu(last_desc->hw.td.info)) == USB_PID_OUT) {
set_qh_element(qh, last_desc->dma_addr); // re-trigger status stage
dbg("short packet during control transfer, retrigger status stage @ %p",last_desc);
urb_priv->flags = 1; // mark as short control packet
return 0;
}
}
// all other cases: short read is OK
data_toggle = uhci_toggle (le32_to_cpu(desc->hw.td.info));
break;
}
else if (status)
goto is_error;
data_toggle = uhci_toggle (le32_to_cpu(desc->hw.td.info));
queue_dbg("process_transfer: len:%d status:%x mapped:%x toggle:%d", actual_length, le32_to_cpu(desc->hw.td.status),status, data_toggle);
}
if (usb_pipetype (urb->pipe) == PIPE_BULK ) { /* toggle correction for short bulk transfers (nonqueued/queued) */
urb_priv_t *priv=(urb_priv_t*)urb->hcpriv;
urb_t *next_queued_urb=priv->next_queued_urb;
if (next_queued_urb) {
urb_priv_t *next_priv=(urb_priv_t*)next_queued_urb->hcpriv;
uhci_desc_t *qh = list_entry (next_priv->desc_list.next, uhci_desc_t, desc_list);
uhci_desc_t *first_td=list_entry (qh->vertical.next, uhci_desc_t, vertical);
if (data_toggle == uhci_toggle (le32_to_cpu(first_td->hw.td.info))) {
err("process_transfer: fixed toggle");
correct_data_toggles(next_queued_urb);
}
}
else
usb_settoggle (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe), !data_toggle);
}
transfer_finished:
uhci_clean_transfer(s, urb, qh, mode);
urb->status = status;
#ifdef CONFIG_USB_UHCI_HIGH_BANDWIDTH
disable_desc_loop(s,urb);
#endif
queue_dbg("process_transfer: (end) urb %p, wanted len %d, len %d status %x err %d",
urb,urb->transfer_buffer_length,urb->actual_length, urb->status, urb->error_count);
return ret;
}
_static int process_interrupt (uhci_t *s, urb_t *urb)
{
int i, ret = -EINPROGRESS;
urb_priv_t *urb_priv = urb->hcpriv;
struct list_head *p = urb_priv->desc_list.next;
uhci_desc_t *desc = list_entry (urb_priv->desc_list.prev, uhci_desc_t, desc_list);
int actual_length;
int status = 0;
//dbg("urb contains interrupt request");
for (i = 0; p != &urb_priv->desc_list; p = p->next, i++) // Maybe we allow more than one TD later ;-)
{
desc = list_entry (p, uhci_desc_t, desc_list);
if (is_td_active(desc)) {
// do not process active TDs
//dbg("TD ACT Status @%p %08x",desc,le32_to_cpu(desc->hw.td.status));
break;
}
if (!(desc->hw.td.status & cpu_to_le32(TD_CTRL_IOC))) {
// do not process one-shot TDs, no recycling
break;
}
// extract transfer parameters from TD
actual_length = uhci_actual_length(le32_to_cpu(desc->hw.td.status));
status = uhci_map_status (uhci_status_bits (le32_to_cpu(desc->hw.td.status)), usb_pipeout (urb->pipe));
// see if EP is stalled
if (status == -EPIPE) {
// set up stalled condition
usb_endpoint_halt (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe));
}
// if any error occurred: ignore this td, and continue
if (status != 0) {
//uhci_show_td (desc);
urb->error_count++;
goto recycle;
}
else
urb->actual_length = actual_length;
recycle:
uhci_urb_dma_sync(s, urb, urb->hcpriv);
if (urb->complete) {
//dbg("process_interrupt: calling completion, status %i",status);
urb->status = status;
((urb_priv_t*)urb->hcpriv)->flags=1; // if unlink_urb is called during completion
spin_unlock(&s->urb_list_lock);
urb->complete ((struct urb *) urb);
spin_lock(&s->urb_list_lock);
((urb_priv_t*)urb->hcpriv)->flags=0;
}
if ((urb->status != -ECONNABORTED) && (urb->status != ECONNRESET) &&
(urb->status != -ENOENT)) {
urb->status = -EINPROGRESS;
// Recycle INT-TD if interval!=0, else mark TD as one-shot
if (urb->interval) {
desc->hw.td.info &= cpu_to_le32(~(1 << TD_TOKEN_TOGGLE));
if (status==0) {
((urb_priv_t*)urb->hcpriv)->started=jiffies;
desc->hw.td.info |= cpu_to_le32((usb_gettoggle (urb->dev, usb_pipeendpoint (urb->pipe),
usb_pipeout (urb->pipe)) << TD_TOKEN_TOGGLE));
usb_dotoggle (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe));
} else {
desc->hw.td.info |= cpu_to_le32((!usb_gettoggle (urb->dev, usb_pipeendpoint (urb->pipe),
usb_pipeout (urb->pipe)) << TD_TOKEN_TOGGLE));
}
desc->hw.td.status= cpu_to_le32((urb->pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | TD_CTRL_IOC |
(urb->transfer_flags & USB_DISABLE_SPD ? 0 : TD_CTRL_SPD) | (3 << 27));
mb();
}
else {
uhci_unlink_urb_async(s, urb, UNLINK_ASYNC_STORE_URB);
// correct toggle after unlink
usb_dotoggle (urb->dev, usb_pipeendpoint (urb->pipe), usb_pipeout (urb->pipe));
clr_td_ioc(desc); // inactivate TD
}
}
}
return ret;
}
// mode: PROCESS_ISO_REGULAR: processing only for done TDs, unlink TDs
// mode: PROCESS_ISO_FORCE: force processing, don't unlink TDs (already unlinked)
_static int process_iso (uhci_t *s, urb_t *urb, int mode)
{
int i;
int ret = 0;
urb_priv_t *urb_priv = urb->hcpriv;
struct list_head *p = urb_priv->desc_list.next, *p_tmp;
uhci_desc_t *desc = list_entry (urb_priv->desc_list.prev, uhci_desc_t, desc_list);
dbg("urb contains iso request");
if (is_td_active(desc) && mode==PROCESS_ISO_REGULAR)
return -EXDEV; // last TD not finished
urb->error_count = 0;
urb->actual_length = 0;
urb->status = 0;
dbg("process iso urb %p, %li, %i, %i, %i %08x",urb,jiffies,UHCI_GET_CURRENT_FRAME(s),
urb->number_of_packets,mode,le32_to_cpu(desc->hw.td.status));
for (i = 0; p != &urb_priv->desc_list; i++) {
desc = list_entry (p, uhci_desc_t, desc_list);
//uhci_show_td(desc);
if (is_td_active(desc)) {
// means we have completed the last TD, but not the TDs before
desc->hw.td.status &= cpu_to_le32(~TD_CTRL_ACTIVE);
dbg("TD still active (%x)- grrr. paranoia!", le32_to_cpu(desc->hw.td.status));
ret = -EXDEV;
urb->iso_frame_desc[i].status = ret;
unlink_td (s, desc, 1);
// FIXME: immediate deletion may be dangerous
goto err;
}
if (mode == PROCESS_ISO_REGULAR)
unlink_td (s, desc, 1);
if (urb->number_of_packets <= i) {
dbg("urb->number_of_packets (%d)<=(%d)", urb->number_of_packets, i);
ret = -EINVAL;
goto err;
}
urb->iso_frame_desc[i].actual_length = uhci_actual_length(le32_to_cpu(desc->hw.td.status));
urb->iso_frame_desc[i].status = uhci_map_status (uhci_status_bits (le32_to_cpu(desc->hw.td.status)), usb_pipeout (urb->pipe));
urb->actual_length += urb->iso_frame_desc[i].actual_length;
err:
if (urb->iso_frame_desc[i].status != 0) {
urb->error_count++;
urb->status = urb->iso_frame_desc[i].status;
}
dbg("process_iso: %i: len:%d %08x status:%x",
i, urb->iso_frame_desc[i].actual_length, le32_to_cpu(desc->hw.td.status),urb->iso_frame_desc[i].status);
p_tmp = p;
p = p->next;
list_del (p_tmp);
delete_desc (s, desc);
}
dbg("process_iso: exit %i (%d), actual_len %i", i, ret,urb->actual_length);
return ret;
}
_static int process_urb (uhci_t *s, struct list_head *p)
{
int ret = 0;
urb_t *urb;
urb=list_entry (p, urb_t, urb_list);
//dbg("process_urb: found queued urb: %p", urb);
switch (usb_pipetype (urb->pipe)) {
case PIPE_CONTROL:
ret = process_transfer (s, urb, CLEAN_TRANSFER_REGULAR);
break;
case PIPE_BULK:
if (!s->avoid_bulk.counter)
ret = process_transfer (s, urb, CLEAN_TRANSFER_REGULAR);
else
return 0;
break;
case PIPE_ISOCHRONOUS:
ret = process_iso (s, urb, PROCESS_ISO_REGULAR);
break;
case PIPE_INTERRUPT:
ret = process_interrupt (s, urb);
break;
}
if (urb->status != -EINPROGRESS) {
urb_priv_t *urb_priv;
struct usb_device *usb_dev;
usb_dev=urb->dev;
/* Release bandwidth for Interrupt or Iso transfers */
if (urb->bandwidth) {
if (usb_pipetype(urb->pipe)==PIPE_ISOCHRONOUS)
usb_release_bandwidth (urb->dev, urb, 1);
else if (usb_pipetype(urb->pipe)==PIPE_INTERRUPT && urb->interval)
usb_release_bandwidth (urb->dev, urb, 0);
}
dbg("dequeued urb: %p", urb);
dequeue_urb (s, urb);
urb_priv = urb->hcpriv;
uhci_urb_dma_unmap(s, urb, urb_priv);
#ifdef DEBUG_SLAB
kmem_cache_free(urb_priv_kmem, urb_priv);
#else
kfree (urb_priv);
#endif
if ((usb_pipetype (urb->pipe) != PIPE_INTERRUPT)) { // process_interrupt does completion on its own
urb_t *next_urb = urb->next;
int is_ring = 0;
int contains_killed = 0;
int loop_count=0;
if (next_urb) {
// Find out if the URBs are linked to a ring
while (next_urb != NULL && next_urb != urb && loop_count < MAX_NEXT_COUNT) {
if (next_urb->status == -ENOENT) {// killed URBs break ring structure & resubmission
contains_killed = 1;
break;
}
next_urb = next_urb->next;
loop_count++;
}
if (loop_count == MAX_NEXT_COUNT)
err("process_urb: Too much linked URBs in ring detection!");
if (next_urb == urb)
is_ring=1;
}
// Submit idle/non-killed URBs linked with urb->next
// Stop before the current URB
next_urb = urb->next;
if (next_urb && !contains_killed) {
int ret_submit;
next_urb = urb->next;
loop_count=0;
while (next_urb != NULL && next_urb != urb && loop_count < MAX_NEXT_COUNT) {
if (next_urb->status != -EINPROGRESS) {
if (next_urb->status == -ENOENT)
break;
spin_unlock(&s->urb_list_lock);
ret_submit=uhci_submit_urb(next_urb);
spin_lock(&s->urb_list_lock);
if (ret_submit)
break;
}
loop_count++;
next_urb = next_urb->next;
}
if (loop_count == MAX_NEXT_COUNT)
err("process_urb: Too much linked URBs in resubmission!");
}
// Completion
if (urb->complete) {
int was_unlinked = (urb->status == -ENOENT);
urb->dev = NULL;
spin_unlock(&s->urb_list_lock);
urb->complete ((struct urb *) urb);
// Re-submit the URB if ring-linked
if (is_ring && !was_unlinked && !contains_killed) {
urb->dev=usb_dev;
uhci_submit_urb (urb);
}
spin_lock(&s->urb_list_lock);
}
usb_dec_dev_use (usb_dev);
}
}
return ret;
}
_static void uhci_interrupt (int irq, void *__uhci, struct pt_regs *regs)
{
uhci_t *s = __uhci;
unsigned int io_addr = s->io_addr;
unsigned short status;
struct list_head *p, *p2;
int restarts, work_done;
/*
* Read the interrupt status, and write it back to clear the
* interrupt cause
*/
status = inw (io_addr + USBSTS);
if (!status) /* shared interrupt, not mine */
return;
dbg("interrupt");
if (status != 1) {
// Avoid too much error messages at a time
if (time_after(jiffies, s->last_error_time + ERROR_SUPPRESSION_TIME)) {
warn("interrupt, status %x, frame# %i", status,
UHCI_GET_CURRENT_FRAME(s));
s->last_error_time = jiffies;
}
// remove host controller halted state
if ((status&0x20) && (s->running)) {
err("Host controller halted, trying to restart.");
outw (USBCMD_RS | inw(io_addr + USBCMD), io_addr + USBCMD);
}
//uhci_show_status (s);
}
/*
* traverse the list in *reverse* direction, because new entries
* may be added at the end.
* also, because process_urb may unlink the current urb,
* we need to advance the list before
* New: check for max. workload and restart count
*/
spin_lock (&s->urb_list_lock);
restarts=0;
work_done=0;
restart:
s->unlink_urb_done=0;
p = s->urb_list.prev;
while (p != &s->urb_list && (work_done < 1024)) {
p2 = p;
p = p->prev;
process_urb (s, p2);
work_done++;
if (s->unlink_urb_done) {
s->unlink_urb_done=0;
restarts++;
if (restarts<16) // avoid endless restarts
goto restart;
else
break;
}
}
if (time_after(jiffies, s->timeout_check + (HZ/30)))
uhci_check_timeouts(s);
clean_descs(s, CLEAN_NOT_FORCED);
uhci_cleanup_unlink(s, CLEAN_NOT_FORCED);
uhci_switch_timer_int(s);
spin_unlock (&s->urb_list_lock);
outw (status, io_addr + USBSTS);
//dbg("uhci_interrupt: done");
}
_static void reset_hc (uhci_t *s)
{
unsigned int io_addr = s->io_addr;
s->apm_state = 0;
/* Global reset for 50ms */
outw (USBCMD_GRESET, io_addr + USBCMD);
uhci_wait_ms (50);
outw (0, io_addr + USBCMD);
uhci_wait_ms (10);
}
_static void start_hc (uhci_t *s)
{
unsigned int io_addr = s->io_addr;
int timeout = 10;
/*
* 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.
*/
outw (USBCMD_HCRESET, io_addr + USBCMD);
while (inw (io_addr + USBCMD) & USBCMD_HCRESET) {
if (!--timeout) {
err("USBCMD_HCRESET timed out!");
break;
}
udelay(1);
}
/* Turn on all interrupts */
outw (USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP, io_addr + USBINTR);
/* Start at frame 0 */
outw (0, io_addr + USBFRNUM);
outl (s->framelist_dma, io_addr + USBFLBASEADD);
/* Run and mark it configured with a 64-byte max packet */
outw (USBCMD_RS | USBCMD_CF | USBCMD_MAXP, io_addr + USBCMD);
s->apm_state = 1;
s->running = 1;
}
/* No __devexit, since it maybe called from alloc_uhci() */
_static void
uhci_pci_remove (struct pci_dev *dev)
{
uhci_t *s = pci_get_drvdata(dev);
struct usb_device *root_hub = s->bus->root_hub;
s->running = 0; // Don't allow submit_urb
if (root_hub)
usb_disconnect (&root_hub);
reset_hc (s);
wait_ms (1);
uhci_unlink_urbs (s, 0, CLEAN_FORCED); // Forced unlink of remaining URBs
uhci_cleanup_unlink (s, CLEAN_FORCED); // force cleanup of async killed URBs
usb_deregister_bus (s->bus);
release_region (s->io_addr, s->io_size);
free_irq (s->irq, s);
usb_free_bus (s->bus);
cleanup_skel (s);
kfree (s);
}
_static int __init uhci_start_usb (uhci_t *s)
{ /* start it up */
/* connect the virtual root hub */
struct usb_device *usb_dev;
usb_dev = usb_alloc_dev (NULL, s->bus);
if (!usb_dev)
return -1;
s->bus->root_hub = usb_dev;
usb_connect (usb_dev);
if (usb_new_device (usb_dev) != 0) {
usb_free_dev (usb_dev);
return -1;
}
return 0;
}
#ifdef CONFIG_PM
_static int
uhci_pci_suspend (struct pci_dev *dev, u32 state)
{
reset_hc((uhci_t *) pci_get_drvdata(dev));
return 0;
}
_static int
uhci_pci_resume (struct pci_dev *dev)
{
start_hc((uhci_t *) pci_get_drvdata(dev));
return 0;
}
#endif
_static int __devinit alloc_uhci (struct pci_dev *dev, int irq, unsigned int io_addr, unsigned int io_size)
{
uhci_t *s;
struct usb_bus *bus;
char buf[8], *bufp = buf;
#ifndef __sparc__
sprintf(buf, "%d", irq);
#else
bufp = __irq_itoa(irq);
#endif
printk(KERN_INFO __FILE__ ": USB UHCI at I/O 0x%x, IRQ %s\n",
io_addr, bufp);
s = kmalloc (sizeof (uhci_t), GFP_KERNEL);
if (!s)
return -1;
memset (s, 0, sizeof (uhci_t));
INIT_LIST_HEAD (&s->free_desc);
INIT_LIST_HEAD (&s->urb_list);
INIT_LIST_HEAD (&s->urb_unlinked);
spin_lock_init (&s->urb_list_lock);
spin_lock_init (&s->qh_lock);
spin_lock_init (&s->td_lock);
atomic_set(&s->avoid_bulk, 0);
s->irq = -1;
s->io_addr = io_addr;
s->io_size = io_size;
s->uhci_pci=dev;
bus = usb_alloc_bus (&uhci_device_operations);
if (!bus) {
kfree (s);
return -1;
}
s->bus = bus;
bus->hcpriv = s;
/* UHCI specs says devices must have 2 ports, but goes on to say */
/* they may have more but give no way to determine how many they */
/* have, so default to 2 */
/* According to the UHCI spec, Bit 7 is always set to 1. So we try */
/* to use this to our advantage */
for (s->maxports = 0; s->maxports < (io_size - 0x10) / 2; s->maxports++) {
unsigned int portstatus;
portstatus = inw (io_addr + 0x10 + (s->maxports * 2));
dbg("port %i, adr %x status %x", s->maxports,
io_addr + 0x10 + (s->maxports * 2), portstatus);
if (!(portstatus & 0x0080))
break;
}
warn("Detected %d ports", s->maxports);
/* This is experimental so anything less than 2 or greater than 8 is */
/* something weird and we'll ignore it */
if (s->maxports < 2 || s->maxports > 8) {
dbg("Port count misdetected, forcing to 2 ports");
s->maxports = 2;
}
s->rh.numports = s->maxports;
s->loop_usage=0;
if (init_skel (s)) {
usb_free_bus (bus);
kfree(s);
return -1;
}
request_region (s->io_addr, io_size, MODNAME);
reset_hc (s);
usb_register_bus (s->bus);
start_hc (s);
if (request_irq (irq, uhci_interrupt, SA_SHIRQ, MODNAME, s)) {
err("request_irq %d failed!",irq);
usb_free_bus (bus);
reset_hc (s);
release_region (s->io_addr, s->io_size);
cleanup_skel(s);
kfree(s);
return -1;
}
/* Enable PIRQ */
pci_write_config_word (dev, USBLEGSUP, USBLEGSUP_DEFAULT);
s->irq = irq;
if(uhci_start_usb (s) < 0) {
uhci_pci_remove(dev);
return -1;
}
//chain new uhci device into global list
pci_set_drvdata(dev, s);
devs=s;
return 0;
}
_static int __devinit
uhci_pci_probe (struct pci_dev *dev, const struct pci_device_id *id)
{
int i;
if (pci_enable_device(dev) < 0)
return -ENODEV;
if (!dev->irq) {
err("found UHCI device with no IRQ assigned. check BIOS settings!");
return -ENODEV;
}
pci_set_master(dev);
/* Search for the IO base address.. */
for (i = 0; i < 6; i++) {
unsigned int io_addr = pci_resource_start(dev, i);
unsigned int io_size = pci_resource_len(dev, i);
if (!(pci_resource_flags(dev,i) & IORESOURCE_IO))
continue;
/* Is it already in use? */
if (check_region (io_addr, io_size))
break;
/* disable legacy emulation */
pci_write_config_word (dev, USBLEGSUP, 0);
return alloc_uhci(dev, dev->irq, io_addr, io_size);
}
return -ENODEV;
}
/*-------------------------------------------------------------------------*/
static const struct pci_device_id __devinitdata uhci_pci_ids [] = { {
/* handle any USB UHCI controller */
class: ((PCI_CLASS_SERIAL_USB << 8) | 0x00),
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, uhci_pci_ids);
static struct pci_driver uhci_pci_driver = {
name: "usb-uhci",
id_table: &uhci_pci_ids [0],
probe: uhci_pci_probe,
remove: uhci_pci_remove,
#ifdef CONFIG_PM
suspend: uhci_pci_suspend,
resume: uhci_pci_resume,
#endif /* PM */
};
/*-------------------------------------------------------------------------*/
static int __init uhci_hcd_init (void)
{
int retval;
#ifdef DEBUG_SLAB
urb_priv_kmem = kmem_cache_create("urb_priv", sizeof(urb_priv_t), 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
if(!urb_priv_kmem) {
err("kmem_cache_create for urb_priv_t failed (out of memory)");
return -ENOMEM;
}
#endif
info(VERSTR);
#ifdef CONFIG_USB_UHCI_HIGH_BANDWIDTH
info("High bandwidth mode enabled");
#endif
retval = pci_module_init (&uhci_pci_driver);
#ifdef DEBUG_SLAB
if (retval < 0 ) {
if (kmem_cache_destroy(urb_priv_kmem))
err("urb_priv_kmem remained");
}
#endif
info(DRIVER_VERSION ":" DRIVER_DESC);
return retval;
}
static void __exit uhci_hcd_cleanup (void)
{
pci_unregister_driver (&uhci_pci_driver);
#ifdef DEBUG_SLAB
if(kmem_cache_destroy(urb_priv_kmem))
err("urb_priv_kmem remained");
#endif
}
module_init (uhci_hcd_init);
module_exit (uhci_hcd_cleanup);
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");
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