www.pudn.com > usbold11.rar > usb-ohci.c
/*
* URB OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber
*
* [ Initialisation is based on Linus' ]
* [ uhci code and gregs ohci fragments ]
* [ (C) Copyright 1999 Linus Torvalds ]
* [ (C) Copyright 1999 Gregory P. Smith]
*
*
* History:
*
* v5.2 1999/12/07 URB 3rd preview,
* v5.1 1999/11/30 URB 2nd preview, cpia, (usb-scsi)
* v5.0 1999/11/22 URB Technical preview, Paul Mackerras powerbook susp/resume
* i386: HUB, Keyboard, Mouse, Printer
*
* v4.3 1999/10/27 multiple HCs, bulk_request
* v4.2 1999/09/05 ISO API alpha, new dev alloc, neg Error-codes
* v4.1 1999/08/27 Randy Dunlap's - ISO API first impl.
* v4.0 1999/08/18
* v3.0 1999/06/25
* v2.1 1999/05/09 code clean up
* v2.0 1999/05/04
* v1.0 1999/04/27 initial release
*
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include /* for in_interrupt() */
#include
#include
#include
#undef DEBUG
#define OHCI_USE_NPS
#include "usb.h"
#include "usb-ohci.h"
#ifdef CONFIG_APM
#include
static int handle_apm_event (apm_event_t event);
#endif
#ifdef CONFIG_PMAC_PBOOK
#include
#include
#endif
static DECLARE_WAIT_QUEUE_HEAD (op_wakeup);
static LIST_HEAD (ohci_hcd_list);
spinlock_t usb_ed_lock = SPIN_LOCK_UNLOCKED;
/*-------------------------------------------------------------------------*
* URB support functions
*-------------------------------------------------------------------------*/
/* free the private part of an URB */
static void urb_rm_priv (urb_t * urb)
{
urb_priv_t * urb_priv = urb->hcpriv;
int i;
void * wait;
if (!urb_priv) return;
wait = urb_priv->wait;
for (i = 0; i < urb_priv->length; i++) {
if (urb_priv->td [i]) {
OHCI_FREE (urb_priv->td [i]);
}
}
kfree (urb->hcpriv);
urb->hcpriv = NULL;
if (wait) {
add_wait_queue (&op_wakeup, wait);
wake_up (&op_wakeup);
}
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
static int sohci_get_current_frame_number (struct usb_device * dev);
/* debug| print the main components of an URB
* small: 0) header + data packets 1) just header */
static void urb_print (urb_t * urb, char * str, int small)
{
unsigned int pipe= urb->pipe;
int i, len;
if (!urb->dev || !urb->dev->bus) {
dbg("%s URB: no dev", str);
return;
}
dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,flags:%4x,len:%d/%d,stat:%d(%x)",
str,
sohci_get_current_frame_number (urb->dev),
usb_pipedevice (pipe),
usb_pipeendpoint (pipe),
usb_pipeout (pipe)? 'O': 'I',
usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
(usb_pipecontrol (pipe)? "CTRL": "BULK"),
urb->transfer_flags,
urb->actual_length,
urb->transfer_buffer_length,
urb->status, urb->status);
if (!small) {
if (usb_pipecontrol (pipe)) {
printk (KERN_DEBUG __FILE__ ": cmd(8):");
for (i = 0; i < 8 ; i++)
printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
printk ("\n");
}
if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
printk (KERN_DEBUG __FILE__ ": data(%d/%d):",
urb->actual_length,
urb->transfer_buffer_length);
len = usb_pipeout (pipe)?
urb->transfer_buffer_length: urb->actual_length;
for (i = 0; i < 16 && i < len; i++)
printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
printk ("%s stat:%d\n", i < len? "...": "", urb->status);
}
}
}
/* just for debugging; prints all 32 branches of the int ed tree inclusive iso eds*/
void ep_print_int_eds (ohci_t * ohci, char * str) {
int i, j;
__u32 * ed_p;
for (i= 0; i < 32; i++) {
j = 5;
printk (KERN_DEBUG __FILE__ " %s branch int %2d(%2x):", str, i, i);
ed_p = &(ohci->hcca.int_table [i]);
while (*ed_p != 0 && j--) {
ed_t *ed = (ed_t *) bus_to_virt(le32_to_cpup(ed_p));
printk (" ed: %4x;", ed->hwINFO);
ed_p = &ed->hwNextED;
}
printk ("\n");
}
}
#endif
/*-------------------------------------------------------------------------*
* Interface functions (URB)
*-------------------------------------------------------------------------*/
/* return a request to the completion handler */
static int sohci_return_urb (urb_t * urb)
{
urb_priv_t * urb_priv = urb->hcpriv;
urb_t * urbt;
unsigned long flags;
int i;
/* just to be sure */
if (!urb->complete) {
urb_rm_priv (urb);
usb_dec_dev_use (urb->dev);
return -1;
}
if (!urb_priv) return -1; /* urb already unlinked */
#ifdef DEBUG
urb_print (urb, "RET", usb_pipeout (urb->pipe));
#endif
switch (usb_pipetype (urb->pipe)) {
case PIPE_INTERRUPT:
urb->complete (urb); /* call complete and requeue URB */
urb->actual_length = 0;
urb->status = USB_ST_URB_PENDING;
if (urb_priv->state != URB_DEL)
td_submit_urb (urb);
break;
case PIPE_ISOCHRONOUS:
for (urbt = urb->next; urbt && (urbt != urb); urbt = urbt->next);
if (urbt) { /* send the reply and requeue URB */
urb->complete (urb);
spin_lock_irqsave (&usb_ed_lock, flags);
urb->actual_length = 0;
urb->status = USB_ST_URB_PENDING;
urb->start_frame = urb_priv->ed->last_iso + 1;
if (urb_priv->state != URB_DEL) {
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].actual_length = 0;
urb->iso_frame_desc[i].status = -EXDEV;
}
td_submit_urb (urb);
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
} else { /* unlink URB, call complete */
urb_rm_priv (urb);
usb_dec_dev_use (urb->dev);
urb->complete (urb);
}
break;
case PIPE_BULK:
case PIPE_CONTROL: /* unlink URB, call complete */
urb_rm_priv (urb);
usb_dec_dev_use (urb->dev);
urb->complete (urb);
break;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* get a transfer request */
static int sohci_submit_urb (urb_t * urb)
{
ohci_t * ohci;
ed_t * ed;
urb_priv_t * urb_priv;
unsigned int pipe = urb->pipe;
int i, size = 0;
unsigned long flags;
if (!urb->dev || !urb->dev->bus) return -EINVAL;
if (urb->hcpriv) return -EINVAL; /* urb already in use */
usb_inc_dev_use (urb->dev);
ohci = (ohci_t *) urb->dev->bus->hcpriv;
#ifdef DEBUG
urb_print (urb, "SUB", usb_pipein (pipe));
#endif
if (usb_pipedevice (pipe) == ohci->rh.devnum)
return rh_submit_urb (urb); /* a request to the virtual root hub */
/* every endpoint has a ed, locate and fill it */
if (!(ed = ep_add_ed (urb->dev, pipe, urb->interval, 1))) {
usb_dec_dev_use (urb->dev);
return -ENOMEM;
}
/* for the private part of the URB we need the number of TDs (size) */
switch (usb_pipetype (pipe)) {
case PIPE_BULK: /* one TD for every 4096 Byte */
size = (urb->transfer_buffer_length - 1) / 4096 + 1;
break;
case PIPE_ISOCHRONOUS: /* number of packets from URB */
size = urb->number_of_packets;
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].actual_length = 0;
urb->iso_frame_desc[i].status = -EXDEV;
}
break;
case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
size = (urb->transfer_buffer_length == 0)? 2:
(urb->transfer_buffer_length - 1) / 4096 + 3;
break;
case PIPE_INTERRUPT: /* one TD */
size = 1;
break;
}
/* allocate the private part or the URB */
urb_priv = kmalloc (sizeof (urb_priv_t) + size * sizeof (td_t *),
in_interrupt() ? GFP_ATOMIC : GFP_KERNEL);
if (!urb_priv) {
usb_dec_dev_use (urb->dev);
return -ENOMEM;
}
memset (urb_priv, 0, sizeof (urb_priv_t) + size * sizeof (td_t *));
/* fill the private part of the URB */
urb->hcpriv = urb_priv;
urb_priv->length = size;
urb_priv->td_cnt = 0;
urb_priv->state = 0;
urb_priv->ed = ed;
urb_priv->wait = NULL;
/* allocate the TDs */
for (i = 0; i < size; i++) {
OHCI_ALLOC (urb_priv->td[i], sizeof (td_t));
if (!urb_priv->td[i]) {
usb_dec_dev_use (urb->dev);
urb_rm_priv (urb);
return -ENOMEM;
}
}
spin_lock_irqsave (&usb_ed_lock, flags);
if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
urb_rm_priv(urb);
usb_dec_dev_use (urb->dev);
return -EINVAL;
}
/* for ISOC transfers calculate start frame index */
if (urb->transfer_flags & USB_ISO_ASAP) {
urb->start_frame = ((ed->state == ED_OPER)? (ed->last_iso + 1):
(le16_to_cpu (ohci->hcca.frame_no) + 10)) & 0xffff;
}
td_submit_urb (urb); /* fill the TDs and link it to the ed */
if (ed->state != ED_OPER) /* link the ed into a chain if is not already */
ep_link (ohci, ed);
spin_unlock_irqrestore (&usb_ed_lock, flags);
urb->status = USB_ST_URB_PENDING;
// queue_urb(s, &urb->urb_list);
return 0;
}
/*-------------------------------------------------------------------------*/
/* deactivate all TDs and remove the private part of the URB */
static int sohci_unlink_urb (urb_t * urb)
{
unsigned long flags;
ohci_t * ohci;
DECLARE_WAITQUEUE (wait, current);
if (!urb) /* just to be sure */
return -EINVAL;
#ifdef DEBUG
urb_print (urb, "UNLINK", 1);
#endif
ohci = (ohci_t *) urb->dev->bus->hcpriv;
if (usb_pipedevice (urb->pipe) == ohci->rh.devnum)
return rh_unlink_urb (urb); /* a request to the virtual root hub */
if (urb->hcpriv) {
if (urb->status == USB_ST_URB_PENDING) { /* URB active? */
urb_priv_t * urb_priv = urb->hcpriv;
urb_priv->state = URB_DEL;
/* we want to delete the TDs of an URB from an ed
* request the deletion, it will be handled at the next USB-frame */
urb_priv->wait = &wait;
spin_lock_irqsave (&usb_ed_lock, flags);
ep_rm_ed (urb->dev, urb_priv->ed);
urb_priv->ed->state |= ED_URB_DEL;
spin_unlock_irqrestore (&usb_ed_lock, flags);
current->state = TASK_UNINTERRUPTIBLE;
if(schedule_timeout (HZ / 10)) /* wait until all TDs are deleted */
remove_wait_queue (&op_wakeup, &wait);
else
err("unlink URB timeout!");
} else
urb_rm_priv (urb);
usb_dec_dev_use (urb->dev);
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* allocate private data space for a usb device */
static int sohci_alloc_dev (struct usb_device *usb_dev)
{
struct ohci_device * dev;
dev = kmalloc (sizeof (*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
memset (dev, 0, sizeof (*dev));
usb_dev->hcpriv = dev;
return 0;
}
/*-------------------------------------------------------------------------*/
/* free private data space of usb device */
static int sohci_free_dev (struct usb_device * usb_dev)
{
unsigned long flags;
int i, cnt = 0;
ed_t * ed;
DECLARE_WAITQUEUE (wait, current);
struct ohci_device * dev = usb_to_ohci (usb_dev);
ohci_t * ohci = usb_dev->bus->hcpriv;
if (!dev) return 0;
if (usb_dev->devnum >= 0) {
/* delete all TDs of all EDs */
spin_lock_irqsave (&usb_ed_lock, flags);
for(i = 0; i < NUM_EDS; i++) {
ed = &(dev->ed[i]);
if (ed->state != ED_NEW) {
if (ed->state == ED_OPER) ep_unlink (ohci, ed);
ep_rm_ed (usb_dev, ed);
ed->state = ED_DEL;
cnt++;
}
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
if (cnt > 0) {
dev->wait = &wait;
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout (HZ / 10);
remove_wait_queue (&op_wakeup, &wait);
}
}
kfree (dev);
return 0;
}
/*-------------------------------------------------------------------------*/
/* tell us the current USB frame number */
static int sohci_get_current_frame_number (struct usb_device *usb_dev)
{
ohci_t * ohci = usb_dev->bus->hcpriv;
return le16_to_cpu (ohci->hcca.frame_no);
}
/*-------------------------------------------------------------------------*/
struct usb_operations sohci_device_operations = {
sohci_alloc_dev,
sohci_free_dev,
sohci_get_current_frame_number,
sohci_submit_urb,
sohci_unlink_urb
};
/*-------------------------------------------------------------------------*
* ED handling functions
*-------------------------------------------------------------------------*/
/* search for the right branch to insert an interrupt ed into the int tree
* do some load ballancing;
* returns the branch and
* sets the interval to interval = 2^integer (ld (interval)) */
static int ep_int_ballance (ohci_t * ohci, int interval, int load)
{
int i, branch = 0;
/* search for the least loaded interrupt endpoint branch of all 32 branches */
for (i = 0; i < 32; i++)
if (ohci->ohci_int_load [branch] > ohci->ohci_int_load [i]) branch = i;
branch = branch % interval;
for (i = branch; i < 32; i += interval) ohci->ohci_int_load [i] += load;
return branch;
}
/*-------------------------------------------------------------------------*/
/* 2^int( ld (inter)) */
static int ep_2_n_interval (int inter)
{
int i;
for (i = 0; ((inter >> i) > 1 ) && (i < 5); i++);
return 1 << i;
}
/*-------------------------------------------------------------------------*/
/* the int tree is a binary tree
* in order to process it sequentially the indexes of the branches have to be mapped
* the mapping reverses the bits of a word of num_bits length */
static int ep_rev (int num_bits, int word)
{
int i, wout = 0;
for (i = 0; i < num_bits; i++) wout |= (((word >> i) & 1) << (num_bits - i - 1));
return wout;
}
/*-------------------------------------------------------------------------*/
/* link an ed into one of the HC chains */
static int ep_link (ohci_t * ohci, ed_t * edi)
{
int int_branch;
int i;
int inter;
int interval;
int load;
__u32 * ed_p;
volatile ed_t * ed = edi;
ed->state = ED_OPER;
switch (ed->type) {
case CTRL:
ed->hwNextED = 0;
if (ohci->ed_controltail == NULL) {
writel (virt_to_bus (ed), &ohci->regs->ed_controlhead);
} else {
ohci->ed_controltail->hwNextED = cpu_to_le32 (virt_to_bus (ed));
}
ed->ed_prev = ohci->ed_controltail;
ohci->ed_controltail = edi;
break;
case BULK:
ed->hwNextED = 0;
if (ohci->ed_bulktail == NULL) {
writel (virt_to_bus (ed), &ohci->regs->ed_bulkhead);
} else {
ohci->ed_bulktail->hwNextED = cpu_to_le32 (virt_to_bus (ed));
}
ed->ed_prev = ohci->ed_bulktail;
ohci->ed_bulktail = edi;
break;
case INT:
load = ed->int_load;
interval = ep_2_n_interval (ed->int_period);
ed->int_interval = interval;
int_branch = ep_int_ballance (ohci, interval, load);
ed->int_branch = int_branch;
for (i = 0; i < ep_rev (6, interval); i += inter) {
inter = 1;
for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i) + int_branch]);
(*ed_p != 0) && (((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval >= interval);
ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED))
inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval);
ed->hwNextED = *ed_p;
*ed_p = cpu_to_le32 (virt_to_bus (ed));
}
#ifdef DEBUG
ep_print_int_eds (ohci, "LINK_INT");
#endif
break;
case ISO:
ed->hwNextED = 0;
ed->int_interval = 1;
if (ohci->ed_isotail != NULL) {
ohci->ed_isotail->hwNextED = cpu_to_le32 (virt_to_bus (ed));
ed->ed_prev = ohci->ed_isotail;
} else {
for ( i = 0; i < 32; i += inter) {
inter = 1;
for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i)]);
*ed_p != 0;
ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED))
inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval);
*ed_p = cpu_to_le32 (virt_to_bus (ed));
}
ed->ed_prev = NULL;
}
ohci->ed_isotail = edi;
#ifdef DEBUG
ep_print_int_eds (ohci, "LINK_ISO");
#endif
break;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* unlink an ed from one of the HC chains.
* just the link to the ed is unlinked.
* the link from the ed still points to another operational ed or 0
* so the HC can eventually finish the processing of the unlinked ed */
static int ep_unlink (ohci_t * ohci, ed_t * ed)
{
int int_branch;
int i;
int inter;
int interval;
__u32 * ed_p;
switch (ed->type) {
case CTRL:
if (ed->ed_prev == NULL) {
writel (le32_to_cpup (&ed->hwNextED), &ohci->regs->ed_controlhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
}
if(ohci->ed_controltail == ed) {
ohci->ed_controltail = ed->ed_prev;
} else {
((ed_t *) bus_to_virt (le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev;
}
break;
case BULK:
if (ed->ed_prev == NULL) {
writel (le32_to_cpup (&ed->hwNextED), &ohci->regs->ed_bulkhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
}
if (ohci->ed_bulktail == ed) {
ohci->ed_bulktail = ed->ed_prev;
} else {
((ed_t *) bus_to_virt (le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev;
}
break;
case INT:
int_branch = ed->int_branch;
interval = ed->int_interval;
for (i = 0; i < ep_rev (6, interval); i += inter) {
for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i) + int_branch]), inter = 1;
(*ed_p != 0) && (*ed_p != ed->hwNextED);
ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED),
inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval)) {
if(((ed_t *) bus_to_virt (le32_to_cpup (ed_p))) == ed) {
*ed_p = ed->hwNextED;
break;
}
}
}
for (i = int_branch; i < 32; i += interval) ohci->ohci_int_load[i] -= ed->int_load;
#ifdef DEBUG
ep_print_int_eds (ohci, "UNLINK_INT");
#endif break;
case ISO:
if (ohci->ed_isotail == ed)
ohci->ed_isotail = ed->ed_prev;
if (ed->hwNextED != 0)
((ed_t *) bus_to_virt (le32_to_cpup (&ed->hwNextED)))->ed_prev = ed->ed_prev;
if (ed->ed_prev != NULL) {
ed->ed_prev->hwNextED = ed->hwNextED;
} else {
for (i = 0; i < 32; i += inter) {
inter = 1;
for (ed_p = &(ohci->hcca.int_table[ep_rev (5, i)]);
*ed_p != 0;
ed_p = &(((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->hwNextED)) {
inter = ep_rev (6, ((ed_t *) bus_to_virt (le32_to_cpup (ed_p)))->int_interval);
if(((ed_t *) bus_to_virt (le32_to_cpup (ed_p))) == ed) {
*ed_p = ed->hwNextED;
break;
}
}
}
}
#ifdef DEBUG
ep_print_int_eds (ohci, "UNLINK_ISO");
#endif
break;
}
ed->state = ED_UNLINK;
return 0;
}
/*-------------------------------------------------------------------------*/
/* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
* but the USB stack is a little bit stateless so we do it at every transaction
* if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
* in all other cases the state is left unchanged
* the ed info fields are setted anyway even though most of them should not change */
static ed_t * ep_add_ed (struct usb_device * usb_dev, unsigned int pipe, int interval, int load)
{
ohci_t * ohci = usb_dev->bus->hcpriv;
td_t * td;
ed_t * ed_ret;
volatile ed_t * ed;
spin_lock (&usb_ed_lock);
ed = ed_ret = &(usb_to_ohci (usb_dev)->ed[(usb_pipeendpoint (pipe) << 1) |
(usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))]);
if((ed->state & ED_DEL) || (ed->state & ED_URB_DEL))
return NULL; /* pending delete request */
if (ed->state == ED_NEW) {
ed->hwINFO = cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
OHCI_ALLOC (td, sizeof (*td)); /* dummy td; end of td list for ed */
if(!td) return NULL; /* out of memory */
ed->hwTailP = cpu_to_le32 (virt_to_bus (td));
ed->hwHeadP = ed->hwTailP;
ed->state = ED_UNLINK;
ed->type = usb_pipetype (pipe);
usb_to_ohci (usb_dev)->ed_cnt++;
}
ohci->dev[usb_pipedevice (pipe)] = usb_dev;
ed->hwINFO = cpu_to_le32 (usb_pipedevice (pipe)
| usb_pipeendpoint (pipe) << 7
| (usb_pipeisoc (pipe)? 0x8000: 0)
| (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
| usb_pipeslow (pipe) << 13
| usb_maxpacket (usb_dev, pipe, usb_pipeout (pipe)) << 16);
if (ed->type == INT && ed->state == ED_UNLINK) {
ed->int_period = interval;
ed->int_load = load;
}
spin_unlock(&usb_ed_lock);
return ed_ret;
}
/*-------------------------------------------------------------------------*/
/* request the removal of an endpoint
* put the ep on the rm_list and request a stop of the bulk or ctrl list
* real removal is done at the next start of frame (SOF) hardware interrupt */
static void ep_rm_ed (struct usb_device * usb_dev, ed_t * ed)
{
unsigned int frame;
ohci_t * ohci = usb_dev->bus->hcpriv;
if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) return;
ed->hwINFO |= cpu_to_le32 (OHCI_ED_SKIP);
writel (OHCI_INTR_SF, &ohci->regs->intrstatus);
writel (OHCI_INTR_SF, &ohci->regs->intrenable); /* enable sof interrupt */
frame = le16_to_cpu (ohci->hcca.frame_no) & 0x1;
ed->ed_rm_list = ohci->ed_rm_list[frame];
ohci->ed_rm_list[frame] = ed;
switch (ed->type) {
case CTRL: /* stop CTRL list */
writel (ohci->hc_control &= ~(0x01 << 4), &ohci->regs->control);
break;
case BULK: /* stop BULK list */
writel (ohci->hc_control &= ~(0x01 << 5), &ohci->regs->control);
break;
}
}
/*-------------------------------------------------------------------------*
* TD handling functions
*-------------------------------------------------------------------------*/
/* prepare a TD */
static void td_fill (unsigned int info, void * data, int len, urb_t * urb, int type, int index)
{
volatile td_t * td, * td_pt;
urb_priv_t * urb_priv = urb->hcpriv;
if (index >= urb_priv->length) {
err("internal OHCI error: TD index > length");
return;
}
td_pt = urb_priv->td [index];
/* fill the old dummy TD */
td = urb_priv->td [index] = (td_t *) bus_to_virt (le32_to_cpup (&urb_priv->ed->hwTailP) & 0xfffffff0);
td->ed = urb_priv->ed;
td->index = index;
td->urb = urb;
td->hwINFO = cpu_to_le32 (info);
td->type = type;
if ((td->ed->type & 3) == PIPE_ISOCHRONOUS) {
td->hwCBP = cpu_to_le32 (((!data || !len)?
0 : virt_to_bus (data)) & 0xFFFFF000);
td->ed->last_iso = info & 0xffff;
} else {
td->hwCBP = cpu_to_le32 (((!data || !len)? 0 : virt_to_bus (data)));
}
td->hwBE = cpu_to_le32 ((!data || !len )? 0: virt_to_bus (data + len - 1));
td->hwNextTD = cpu_to_le32 (virt_to_bus (td_pt));
td->hwPSW [0] = cpu_to_le16 ((virt_to_bus (data) & 0x0FFF) | 0xE000);
td_pt->hwNextTD = 0;
td->ed->hwTailP = td->hwNextTD;
td->next_dl_td = NULL; //td_pt;
}
/*-------------------------------------------------------------------------*/
/* prepare all TDs of a transfer */
static void td_submit_urb (urb_t * urb)
{
urb_priv_t * urb_priv = urb->hcpriv;
ohci_t * ohci = (ohci_t *) urb->dev->bus->hcpriv;
void * ctrl = urb->setup_packet;
void * data = urb->transfer_buffer;
int data_len = urb->transfer_buffer_length;
int cnt = 0;
__u32 info = 0;
urb_priv->td_cnt = 0;
switch (usb_pipetype (urb->pipe)) {
case PIPE_BULK:
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_OUT | TD_T_TOGGLE: TD_CC | TD_DP_IN | TD_T_TOGGLE;
while(data_len > 4096) {
td_fill (info, data, 4096, urb, (cnt? 0: ST_ADDR) | ADD_LEN, cnt);
data += 4096; data_len -= 4096; cnt++;
}
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_OUT | TD_T_TOGGLE: TD_CC | TD_R | TD_DP_IN | TD_T_TOGGLE;
td_fill (info, data, data_len, urb, (cnt? 0: ST_ADDR) | ADD_LEN, cnt);
cnt++;
writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
break;
case PIPE_INTERRUPT:
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_OUT | TD_T_TOGGLE: TD_CC | TD_R | TD_DP_IN | TD_T_TOGGLE;
td_fill (info, data, data_len, urb, ST_ADDR | ADD_LEN, cnt++);
break;
case PIPE_CONTROL:
info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
td_fill (info, ctrl, 8, urb, ST_ADDR, cnt++);
if (data_len > 0) {
info = usb_pipeout (urb->pipe)?
TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
td_fill (info, data, data_len, urb, ADD_LEN, cnt++);
}
info = usb_pipeout (urb->pipe)?
TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
td_fill (info, NULL, 0, urb, 0, cnt++);
writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
break;
case PIPE_ISOCHRONOUS:
for (cnt = 0; cnt < urb->number_of_packets; cnt++) {
td_fill (TD_CC|TD_ISO | ((urb->start_frame + cnt) & 0xffff),
(__u8 *) data + urb->iso_frame_desc[cnt].offset,
urb->iso_frame_desc[cnt].length, urb, (cnt? 0: ST_ADDR) | ADD_LEN, cnt);
}
break;
}
if (urb_priv->length != cnt)
dbg("TD LENGTH %d != CNT %d", urb_priv->length, cnt);
}
/*-------------------------------------------------------------------------*
* Done List handling functions
*-------------------------------------------------------------------------*/
/* replies to the request have to be on a FIFO basis so
* we reverse the reversed done-list */
static td_t * dl_reverse_done_list (ohci_t * ohci)
{
__u32 td_list_hc;
td_t * td_rev = NULL;
td_t * td_list = NULL;
urb_priv_t * urb_priv = NULL;
unsigned long flags;
spin_lock_irqsave (&usb_ed_lock, flags);
td_list_hc = le32_to_cpup (&ohci->hcca.done_head) & 0xfffffff0;
ohci->hcca.done_head = 0;
while (td_list_hc) {
td_list = (td_t *) bus_to_virt (td_list_hc);
if (TD_CC_GET (le32_to_cpup (&td_list->hwINFO))) {
urb_priv = (urb_priv_t *) td_list->urb->hcpriv;
dbg(" USB-error/status: %x : %p",
TD_CC_GET (le32_to_cpup (&td_list->hwINFO)), td_list);
if (td_list->ed->hwHeadP & cpu_to_le32 (0x1)) {
if (urb_priv && ((td_list->index + 1) < urb_priv->length)) {
td_list->ed->hwHeadP =
(urb_priv->td[urb_priv->length - 1]->hwNextTD & cpu_to_le32 (0xfffffff0)) |
(td_list->ed->hwHeadP & cpu_to_le32 (0x2));
urb_priv->td_cnt += urb_priv->length - td_list->index - 1;
} else
td_list->ed->hwHeadP &= cpu_to_le32 (0xfffffff2);
}
}
td_list->next_dl_td = td_rev;
td_rev = td_list;
td_list_hc = le32_to_cpup (&td_list->hwNextTD) & 0xfffffff0;
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
return td_list;
}
/*-------------------------------------------------------------------------*/
/* there are some pending requests to remove
* - some of the eds (if ed->state & ED_DEL (set by sohci_free_dev)
* - some URBs/TDs if urb_priv->state == URB_DEL */
static void dl_del_list (ohci_t * ohci, unsigned int frame)
{
unsigned long flags;
ed_t * ed;
__u32 edINFO;
td_t * td = NULL, * td_next = NULL, * tdHeadP = NULL, * tdTailP;
__u32 * td_p;
int ctrl = 0, bulk = 0;
spin_lock_irqsave (&usb_ed_lock, flags);
for (ed = ohci->ed_rm_list[frame]; ed != NULL; ed = ed->ed_rm_list) {
tdTailP = bus_to_virt (le32_to_cpup (&ed->hwTailP) & 0xfffffff0);
tdHeadP = bus_to_virt (le32_to_cpup (&ed->hwHeadP) & 0xfffffff0);
edINFO = le32_to_cpup (&ed->hwINFO);
td_p = &ed->hwHeadP;
for (td = tdHeadP; td != tdTailP; td = td_next) {
urb_t * urb = td->urb;
urb_priv_t * urb_priv = td->urb->hcpriv;
td_next = bus_to_virt (le32_to_cpup (&td->hwNextTD) & 0xfffffff0);
if ((urb_priv->state == URB_DEL) || (ed->state & ED_DEL)) {
*td_p = td->hwNextTD | (*td_p & cpu_to_le32 (0x3));
if(++ (urb_priv->td_cnt) == urb_priv->length)
urb_rm_priv (urb);
} else {
td_p = &td->hwNextTD;
}
}
if (ed->state & ED_DEL) { /* set by sohci_free_dev */
struct ohci_device * dev = usb_to_ohci (ohci->dev[edINFO & 0x7F]);
OHCI_FREE (tdTailP); /* free dummy td */
ed->hwINFO = cpu_to_le32 (OHCI_ED_SKIP);
ed->state = ED_NEW;
/* if all eds are removed wake up sohci_free_dev */
if ((! --dev->ed_cnt) && dev->wait) {
add_wait_queue (&op_wakeup, dev->wait);
wake_up (&op_wakeup);
}
}
else {
ed->state &= ~ED_URB_DEL;
ed->hwINFO &= ~cpu_to_le32 (OHCI_ED_SKIP);
}
if ((ed->type & 3) == CTRL) ctrl |= 1;
if ((ed->type & 3) == BULK) bulk |= 1;
}
if (ctrl) writel (0, &ohci->regs->ed_controlcurrent); /* reset CTRL list */
if (bulk) writel (0, &ohci->regs->ed_bulkcurrent); /* reset BULK list */
if (!ohci->ed_rm_list[!frame]) /* start CTRL u. BULK list */
writel (ohci->hc_control |= (0x03<<4), &ohci->regs->control);
ohci->ed_rm_list[frame] = NULL;
spin_unlock_irqrestore (&usb_ed_lock, flags);
}
/*-------------------------------------------------------------------------*/
/* td done list */
static void dl_done_list (ohci_t * ohci, td_t * td_list)
{
td_t * td_list_next = NULL;
ed_t * ed;
int dlen = 0;
int cc = 0;
urb_t * urb;
urb_priv_t * urb_priv;
__u32 tdINFO, tdBE, tdCBP, edHeadP, edTailP;
__u16 tdPSW;
unsigned long flags;
while (td_list) {
td_list_next = td_list->next_dl_td;
urb = td_list->urb;
urb_priv = urb->hcpriv;
tdINFO = le32_to_cpup (&td_list->hwINFO);
tdBE = le32_to_cpup (&td_list->hwBE);
tdCBP = le32_to_cpup (&td_list->hwCBP);
ed = td_list->ed;
if (td_list->type & ST_ADDR)
urb->actual_length = 0;
if (td_list->type & ADD_LEN) { /* accumulate length of multi td transfers */
if (tdINFO & TD_ISO) {
tdPSW = le16_to_cpu (td_list->hwPSW[0]);
cc = (tdPSW >> 12) & 0xF;
if (cc < 0xE) {
if (usb_pipeout(urb->pipe)) {
dlen = urb->iso_frame_desc[td_list->index].length;
} else {
dlen = tdPSW & 0x3ff;
}
urb->actual_length += dlen;
urb->iso_frame_desc[td_list->index].actual_length = dlen;
if (!(urb->transfer_flags & USB_DISABLE_SPD) && (cc == TD_DATAUNDERRUN))
cc = TD_CC_NOERROR;
urb->iso_frame_desc[td_list->index].status = cc_to_error[cc];
}
} else {
if (tdBE != 0) {
if (td_list->hwCBP == 0)
urb->actual_length = bus_to_virt (tdBE) - urb->transfer_buffer + 1;
else
urb->actual_length = bus_to_virt (tdCBP) - urb->transfer_buffer;
}
}
}
/* error code of transfer */
cc = TD_CC_GET (tdINFO);
if (!(urb->transfer_flags & USB_DISABLE_SPD) && (cc == TD_DATAUNDERRUN))
cc = TD_CC_NOERROR;
if (++(urb_priv->td_cnt) == urb_priv->length) {
if (urb_priv->state != URB_DEL && !(ed->state & ED_DEL) && ed->state != ED_NEW) {
urb->status = cc_to_error[cc];
sohci_return_urb (urb);
} else {
urb_rm_priv (urb);
}
}
spin_lock_irqsave (&usb_ed_lock, flags);
if (ed->state != ED_NEW) {
edHeadP = le32_to_cpup (&ed->hwHeadP) & 0xfffffff0;
edTailP = le32_to_cpup (&ed->hwTailP);
if((edHeadP == edTailP) && (ed->state == ED_OPER))
ep_unlink (ohci, ed); /* unlink eds if they are not busy */
}
spin_unlock_irqrestore (&usb_ed_lock, flags);
td_list = td_list_next;
}
}
/*-------------------------------------------------------------------------*
* 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; */
0x00, /* __u8 iProduct; */
0x00, /* __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 */
};
/*
For OHCI we need just the 2nd Byte, so we
don't need this constant byte-array
static __u8 root_hub_hub_des[] =
{
0x00, * __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; *** 8 Ports max *** *
0xff * __u8 PortPwrCtrlMask; *** 8 ports max *** *
};
*/
/*-------------------------------------------------------------------------*/
/* prepare Interrupt pipe data; HUB INTERRUPT ENDPOINT */
static int rh_send_irq (ohci_t * ohci, void * rh_data, int rh_len)
{
int num_ports;
int i;
int ret;
int len;
__u8 data[8];
num_ports = readl (&ohci->regs->roothub.a) & 0xff;
*(__u8 *) data = (readl (&ohci->regs->roothub.status) & 0x00030000) > 0? 1: 0;
ret = *(__u8 *) data;
for ( i = 0; i < num_ports; i++) {
*(__u8 *) (data + (i + 1) / 8) |=
((readl (&ohci->regs->roothub.portstatus[i]) & 0x001f0000) > 0? 1: 0) << ((i + 1) % 8);
ret += *(__u8 *) (data + (i + 1) / 8);
}
len = i/8 + 1;
if (ret > 0) {
memcpy (rh_data, data, min (len, min (rh_len, sizeof(data))));
return len;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* Virtual Root Hub INTs are polled by this timer every "intervall" ms */
static void rh_int_timer_do (unsigned long ptr)
{
int len;
urb_t * urb = (urb_t *) ptr;
ohci_t * ohci = urb->dev->bus->hcpriv;
if(ohci->rh.send) {
len = rh_send_irq (ohci, urb->transfer_buffer, urb->transfer_buffer_length);
if (len > 0) {
urb->actual_length = len;
#ifdef DEBUG
urb_print (urb, "RET(rh)", usb_pipeout (urb->pipe));
#endif
if (urb->complete) urb->complete (urb);
}
}
rh_init_int_timer (urb);
}
/*-------------------------------------------------------------------------*/
/* Root Hub INTs are polled by this timer */
static int rh_init_int_timer (urb_t * urb)
{
ohci_t * ohci = urb->dev->bus->hcpriv;
ohci->rh.interval = urb->interval;
init_timer (&ohci->rh.rh_int_timer);
ohci->rh.rh_int_timer.function = rh_int_timer_do;
ohci->rh.rh_int_timer.data = (unsigned long) urb;
ohci->rh.rh_int_timer.expires =
jiffies + (HZ * (urb->interval < 30? 30: urb->interval)) / 1000;
add_timer (&ohci->rh.rh_int_timer);
return 0;
}
/*-------------------------------------------------------------------------*/
#define OK(x) len = (x); break
#define WR_RH_STAT(x) writel((x), &ohci->regs->roothub.status)
#define WR_RH_PORTSTAT(x) writel((x), &ohci->regs->roothub.portstatus[wIndex-1])
#define RD_RH_STAT readl(&ohci->regs->roothub.status)
#define RD_RH_PORTSTAT readl(&ohci->regs->roothub.portstatus[wIndex-1])
/* request to virtual root hub */
static int rh_submit_urb (urb_t * urb)
{
struct usb_device * usb_dev = urb->dev;
ohci_t * ohci = 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 = TD_CC_NOERROR;
__u8 datab[16];
__u8 * data_buf = datab;
__u16 bmRType_bReq;
__u16 wValue;
__u16 wIndex;
__u16 wLength;
if (usb_pipeint(pipe)) {
ohci->rh.urb = urb;
ohci->rh.send = 1;
ohci->rh.interval = urb->interval;
rh_init_int_timer(urb);
urb->status = cc_to_error [TD_CC_NOERROR];
return 0;
}
bmRType_bReq = cmd->requesttype | (cmd->request << 8);
wValue = le16_to_cpu (cmd->value);
wIndex = le16_to_cpu (cmd->index);
wLength = le16_to_cpu (cmd->length);
switch (bmRType_bReq) {
/* Request Destination:
without flags: Device,
RH_INTERFACE: interface,
RH_ENDPOINT: endpoint,
RH_CLASS means HUB here,
RH_OTHER | RH_CLASS almost ever means HUB_PORT here
*/
case RH_GET_STATUS:
*(__u16 *) data_buf = cpu_to_le16 (1); OK (2);
case RH_GET_STATUS | RH_INTERFACE:
*(__u16 *) data_buf = cpu_to_le16 (0); OK (2);
case RH_GET_STATUS | RH_ENDPOINT:
*(__u16 *) data_buf = cpu_to_le16 (0); OK (2);
case RH_GET_STATUS | RH_CLASS:
*(__u32 *) data_buf = cpu_to_le32 (RD_RH_STAT & 0x7fff7fff); OK (4);
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
*(__u32 *) data_buf = cpu_to_le32 (RD_RH_PORTSTAT); OK (4);
case RH_CLEAR_FEATURE | RH_ENDPOINT:
switch (wValue) {
case (RH_ENDPOINT_STALL): OK (0);
}
break;
case RH_CLEAR_FEATURE | RH_CLASS:
switch (wValue) {
case RH_C_HUB_LOCAL_POWER:
OK(0);
case (RH_C_HUB_OVER_CURRENT):
WR_RH_STAT(RH_PS_OCIC); OK (0);
}
break;
case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_ENABLE):
WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
case (RH_PORT_SUSPEND):
WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
case (RH_PORT_POWER):
WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
case (RH_C_PORT_CONNECTION):
WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
case (RH_C_PORT_ENABLE):
WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
case (RH_C_PORT_SUSPEND):
WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
case (RH_C_PORT_OVER_CURRENT):
WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
case (RH_C_PORT_RESET):
WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
}
break;
case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_SUSPEND):
WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
if((RD_RH_PORTSTAT &1) != 0) WR_RH_PORTSTAT (RH_PS_PRS ); OK (0);
case (RH_PORT_POWER):
WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
if((RD_RH_PORTSTAT &1) != 0) WR_RH_PORTSTAT (RH_PS_PES ); OK (0);
}
break;
case RH_SET_ADDRESS: ohci->rh.devnum = wValue; OK(0);
case RH_GET_DESCRIPTOR:
switch ((wValue & 0xff00) >> 8) {
case (0x01): /* device descriptor */
len = min (leni, min (sizeof (root_hub_dev_des), wLength));
data_buf = root_hub_dev_des; OK(len);
case (0x02): /* configuration descriptor */
len = min (leni, min (sizeof (root_hub_config_des), wLength));
data_buf = root_hub_config_des; OK(len);
case (0x03): /* string descriptors */
default:
status = TD_CC_STALL;
}
break;
case RH_GET_DESCRIPTOR | RH_CLASS:
*(__u8 *) (data_buf+1) = 0x29;
*(__u32 *) (data_buf+2) = cpu_to_le32 (readl (&ohci->regs->roothub.a));
*(__u8 *) data_buf = (*(__u8 *) (data_buf + 2) / 8) * 2 + 9; /* length of descriptor */
len = min (leni, min(*(__u8 *) data_buf, wLength));
*(__u8 *) (data_buf+6) = 0; /* Root Hub needs no current from bus */
if (*(__u8 *) (data_buf+2) < 8) { /* less than 8 Ports */
*(__u8 *) (data_buf+7) = readl (&ohci->regs->roothub.b) & 0xff;
*(__u8 *) (data_buf+8) = (readl (&ohci->regs->roothub.b) & 0xff0000) >> 16;
} else {
*(__u32 *) (data_buf+7) = cpu_to_le32 (readl(&ohci->regs->roothub.b));
}
OK (len);
case RH_GET_CONFIGURATION: *(__u8 *) data_buf = 0x01; OK (1);
case RH_SET_CONFIGURATION: WR_RH_STAT (0x10000); OK (0);
default:
status = TD_CC_STALL;
}
dbg("USB HC roothubstat1: %x", readl ( &(ohci->regs->roothub.portstatus[0]) ));
dbg("USB HC roothubstat2: %x", readl ( &(ohci->regs->roothub.portstatus[1]) ));
len = min(len, leni);
memcpy (data, data_buf, len);
urb->actual_length = len;
urb->status = cc_to_error [status];
#ifdef DEBUG
urb_print (urb, "RET(rh)", usb_pipeout (urb->pipe));
#endif
if (urb->complete) urb->complete (urb);
return 0;
}
/*-------------------------------------------------------------------------*/
static int rh_unlink_urb (urb_t * urb)
{
ohci_t * ohci = urb->dev->bus->hcpriv;
ohci->rh.send = 0;
del_timer (&ohci->rh.rh_int_timer);
return 0;
}
/*-------------------------------------------------------------------------*
* HC functions
*-------------------------------------------------------------------------*/
/* reset the HC not the BUS */
static void hc_reset (ohci_t * ohci)
{
int timeout = 30;
int smm_timeout = 50; /* 0,5 sec */
if (readl (&ohci->regs->control) & 0x100) { /* SMM owns the HC */
writel (0x08, &ohci->regs->cmdstatus); /* request ownership */
dbg("USB HC TakeOver from SMM");
while (readl (&ohci->regs->control) & 0x100) {
wait_ms (10);
if (--smm_timeout == 0) {
err("USB HC TakeOver failed!");
break;
}
}
}
writel ((1 << 31), &ohci->regs->intrdisable); /* Disable HC interrupts */
dbg("USB HC reset_hc: %x ;", readl (&ohci->regs->control));
/* this seems to be needed for the lucent controller on powerbooks.. */
writel (0, &ohci->regs->control); /* Move USB to reset state */
writel (1, &ohci->regs->cmdstatus); /* HC Reset */
while ((readl (&ohci->regs->cmdstatus) & 0x01) != 0) { /* 10us Reset */
if (--timeout == 0) {
err("USB HC reset timed out!");
return;
}
udelay (1);
}
}
/*-------------------------------------------------------------------------*/
/* Start an OHCI controller, set the BUS operational
* enable interrupts
* connect the virtual root hub */
static int hc_start (ohci_t * ohci)
{
unsigned int mask;
unsigned int fminterval;
struct usb_device * usb_dev;
struct ohci_device * dev;
/* Tell the controller where the control and bulk lists are
* The lists are empty now. */
writel (0, &ohci->regs->ed_controlhead);
writel (0, &ohci->regs->ed_bulkhead);
writel (virt_to_bus (&ohci->hcca), &ohci->regs->hcca); /* a reset clears this */
fminterval = 0x2edf;
writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
writel (fminterval, &ohci->regs->fminterval);
writel (0x628, &ohci->regs->lsthresh);
/* Choose the interrupts we care about now, others later on demand */
mask = OHCI_INTR_MIE | OHCI_INTR_WDH | OHCI_INTR_SO;
writel (ohci->hc_control = 0xBF, &ohci->regs->control); /* USB Operational */
writel (mask, &ohci->regs->intrenable);
writel (mask, &ohci->regs->intrstatus);
#ifdef OHCI_USE_NPS
writel ((readl(&ohci->regs->roothub.a) | 0x200) & ~0x100,
&ohci->regs->roothub.a);
writel (0x10000, &ohci->regs->roothub.status);
mdelay ((readl(&ohci->regs->roothub.a) >> 23) & 0x1fe);
#endif /* OHCI_USE_NPS */
/* connect the virtual root hub */
usb_dev = usb_alloc_dev (NULL, ohci->bus);
if (!usb_dev) return -1;
dev = usb_to_ohci (usb_dev);
ohci->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;
}
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
static void hc_interrupt (int irq, void * __ohci, struct pt_regs * r)
{
ohci_t * ohci = __ohci;
struct ohci_regs * regs = ohci->regs;
int ints;
if ((ohci->hcca.done_head != 0) && !(le32_to_cpup (&ohci->hcca.done_head) & 0x01)) {
ints = OHCI_INTR_WDH;
} else {
if ((ints = (readl (®s->intrstatus) & readl (®s->intrenable))) == 0)
return;
}
dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca.frame_no));
if (ints & OHCI_INTR_WDH) {
writel (OHCI_INTR_WDH, ®s->intrdisable);
dl_done_list (ohci, dl_reverse_done_list (ohci));
writel (OHCI_INTR_WDH, ®s->intrenable);
}
if (ints & OHCI_INTR_SO) {
dbg("USB Schedule overrun");
writel (OHCI_INTR_SO, ®s->intrenable);
}
if (ints & OHCI_INTR_SF) {
unsigned int frame = le16_to_cpu (ohci->hcca.frame_no) & 1;
writel (OHCI_INTR_SF, ®s->intrdisable);
if (ohci->ed_rm_list[!frame] != NULL) {
dl_del_list (ohci, !frame);
}
if (ohci->ed_rm_list[frame] != NULL) writel (OHCI_INTR_SF, ®s->intrenable);
}
writel (ints, ®s->intrstatus);
writel (OHCI_INTR_MIE, ®s->intrenable);
}
/*-------------------------------------------------------------------------*/
/* allocate OHCI */
static ohci_t * hc_alloc_ohci (void * mem_base)
{
int i;
ohci_t * ohci;
struct usb_bus * bus;
ohci = (ohci_t *) __get_free_pages (GFP_KERNEL, 1);
if (!ohci)
return NULL;
memset (ohci, 0, sizeof (ohci_t));
ohci->irq = -1;
ohci->regs = mem_base;
/* for load ballancing of the interrupt branches */
for (i = 0; i < NUM_INTS; i++) ohci->ohci_int_load[i] = 0;
for (i = 0; i < NUM_INTS; i++) ohci->hcca.int_table[i] = 0;
/* end of control and bulk lists */
ohci->ed_isotail = NULL;
ohci->ed_controltail = NULL;
ohci->ed_bulktail = NULL;
bus = usb_alloc_bus (&sohci_device_operations);
if (!bus) {
free_pages ((unsigned long) ohci, 1);
return NULL;
}
ohci->bus = bus;
bus->hcpriv = (void *) ohci;
return ohci;
}
/*-------------------------------------------------------------------------*/
/* De-allocate all resources.. */
static void hc_release_ohci (ohci_t * ohci)
{
dbg("USB HC release ohci");
/* disconnect all devices */
if (ohci->bus->root_hub) usb_disconnect (&ohci->bus->root_hub);
hc_reset (ohci);
writel (OHCI_USB_RESET, &ohci->regs->control);
wait_ms (10);
if (ohci->irq >= 0) {
free_irq (ohci->irq, ohci);
ohci->irq = -1;
}
usb_deregister_bus (ohci->bus);
usb_free_bus (ohci->bus);
/* unmap the IO address space */
iounmap (ohci->regs);
free_pages ((unsigned long) ohci, 1);
}
/*-------------------------------------------------------------------------*/
/* Increment the module usage count, start the control thread and
* return success. */
static int hc_found_ohci (int irq, void * mem_base)
{
ohci_t * ohci;
dbg("USB HC found: irq= %d membase= %lx", irq, (unsigned long) mem_base);
ohci = hc_alloc_ohci (mem_base);
if (!ohci) {
return -ENOMEM;
}
INIT_LIST_HEAD (&ohci->ohci_hcd_list);
list_add (&ohci->ohci_hcd_list, &ohci_hcd_list);
hc_reset (ohci);
writel (ohci->hc_control = OHCI_USB_RESET, &ohci->regs->control);
wait_ms (10);
usb_register_bus (ohci->bus);
if (request_irq (irq, hc_interrupt, SA_SHIRQ, "ohci-usb", ohci) == 0) {
ohci->irq = irq;
hc_start (ohci);
return 0;
}
err("request interrupt %d failed", irq);
hc_release_ohci (ohci);
return -EBUSY;
}
/*-------------------------------------------------------------------------*/
static int hc_start_ohci (struct pci_dev * dev)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
unsigned long mem_base = dev->resource[0].start;
#else
unsigned long mem_base = dev->base_address[0];
if (mem_base & PCI_BASE_ADDRESS_SPACE_IO) return -ENODEV;
mem_base &= PCI_BASE_ADDRESS_MEM_MASK;
#endif
pci_set_master (dev);
mem_base = (unsigned long) ioremap_nocache (mem_base, 4096);
if (!mem_base) {
err("Error mapping OHCI memory");
return -EFAULT;
}
return hc_found_ohci (dev->irq, (void *) mem_base);
}
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_PMAC_PBOOK
/* On Powerbooks, put the controller into suspend mode when going
* to sleep, and do a resume when waking up. */
static int ohci_sleep_notify (struct pmu_sleep_notifier * self, int when)
{
struct list_head * ohci_l;
ohci_t * ohci;
for (ohci_l = ohci_hcd_list.next; ohci_l != &ohci_hcd_list; ohci_l = ohci_l->next) {
ohci = list_entry (ohci_l, ohci_t, ohci_hcd_list);
switch (when) {
case PBOOK_SLEEP_NOW:
disable_irq (ohci->irq);
writel (ohci->hc_control = OHCI_USB_SUSPEND, &ohci->regs->control);
wait_ms (10);
break;
case PBOOK_WAKE:
writel (ohci->hc_control = OHCI_USB_RESUME, &ohci->regs->control);
wait_ms (20);
writel (ohci->hc_control = 0xBF, &ohci->regs->control);
enable_irq (ohci->irq);
break;
}
}
return PBOOK_SLEEP_OK;
}
static struct pmu_sleep_notifier ohci_sleep_notifier = {
ohci_sleep_notify, SLEEP_LEVEL_MISC,
};
#endif /* CONFIG_PMAC_PBOOK */
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_APM
static int handle_apm_event (apm_event_t event)
{
static int down = 0;
ohci_t * ohci;
struct list_head * ohci_l;
switch (event) {
case APM_SYS_SUSPEND:
case APM_USER_SUSPEND:
if (down) {
dbg("received extra suspend event");
break;
}
for (ohci_l = ohci_hcd_list.next; ohci_l != &ohci_hcd_list; ohci_l = ohci_l->next) {
ohci = list_entry (ohci_l, ohci_t, ohci_hcd_list);
dbg("USB-Bus suspend: %p", ohci);
writel (ohci->hc_control = 0xFF, &ohci->regs->control);
}
wait_ms (10);
down = 1;
break;
case APM_NORMAL_RESUME:
case APM_CRITICAL_RESUME:
if (!down) {
dbg("received bogus resume event");
break;
}
for (ohci_l = ohci_hcd_list.next; ohci_l != &ohci_hcd_list; ohci_l = ohci_l->next) {
ohci = list_entry(ohci_l, ohci_t, ohci_hcd_list);
dbg("USB-Bus resume: %p", ohci);
writel (ohci->hc_control = 0x7F, &ohci->regs->control);
}
wait_ms (20);
for (ohci_l = ohci_hcd_list.next; ohci_l != &ohci_hcd_list; ohci_l = ohci_l->next) {
ohci = list_entry (ohci_l, ohci_t, ohci_hcd_list);
writel (ohci->hc_control = 0xBF, &ohci->regs->control);
}
down = 0;
break;
}
return 0;
}
#endif
/*-------------------------------------------------------------------------*/
#define PCI_CLASS_SERIAL_USB_OHCI 0x0C0310
int ohci_hcd_init (void)
{
int ret = -ENODEV;
struct pci_dev * dev = NULL;
while ((dev = pci_find_class (PCI_CLASS_SERIAL_USB_OHCI, dev))) {
if (hc_start_ohci(dev) >= 0) ret = 0;
}
#ifdef CONFIG_APM
apm_register_callback (&handle_apm_event);
#endif
#ifdef CONFIG_PMAC_PBOOK
pmu_register_sleep_notifier (&ohci_sleep_notifier);
#endif
return ret;
}
/*-------------------------------------------------------------------------*/
#ifdef MODULE
int init_module (void)
{
return ohci_hcd_init ();
}
/*-------------------------------------------------------------------------*/
void cleanup_module (void)
{
ohci_t * ohci;
#ifdef CONFIG_APM
apm_unregister_callback (&handle_apm_event);
#endif
#ifdef CONFIG_PMAC_PBOOK
pmu_unregister_sleep_notifier (&ohci_sleep_notifier);
#endif
while (!list_empty (&ohci_hcd_list)) {
ohci = list_entry (ohci_hcd_list.next, ohci_t, ohci_hcd_list);
list_del (&ohci->ohci_hcd_list);
INIT_LIST_HEAD (&ohci->ohci_hcd_list);
hc_release_ohci (ohci);
}
}
#endif //MODULE