/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*
* simple generic USB HCD frontend Version 0.9.5 (10/28/2001)
* for embedded HCs (SL811HS)
*
* USB URB handling, hci_ hcs_
* URB queueing, qu_
* Transfer scheduling, sh_
*
*
*-------------------------------------------------------------------------*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*-------------------------------------------------------------------------*/
/* main lock for urb access */
static spinlock_t usb_urb_lock = SPIN_LOCK_UNLOCKED;
/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/* URB HCD API function layer
* * * */
/***************************************************************************
* Function Name : hcs_urb_queue
*
* This function initializes the urb status and length before queueing the
* urb.
*
* Input: hci = data structure for the host controller
* urb = USB request block data structure
*
* Return: 0
**************************************************************************/
static inline int hcs_urb_queue (hci_t * hci, struct urb * urb)
{
int i;
DBGFUNC ("enter hcs_urb_queue\n");
if (usb_pipeisoc (urb->pipe)) {
DBGVERBOSE ("hcs_urb_queue: isoc pipe\n");
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].actual_length = 0;
urb->iso_frame_desc[i].status = -EXDEV;
}
/* urb->next hack : 1 .. resub, 0 .. single shot */
/* urb->interval = urb->next ? 1 : 0; */
}
urb->status = -EINPROGRESS;
urb->actual_length = 0;
urb->error_count = 0;
if (usb_pipecontrol (urb->pipe))
hc_flush_data_cache (hci, urb->setup_packet, 8);
if (usb_pipeout (urb->pipe))
hc_flush_data_cache (hci, urb->transfer_buffer,
urb->transfer_buffer_length);
qu_queue_urb (hci, urb);
return 0;
}
/***************************************************************************
* Function Name : hcs_return_urb
*
* This function the return path of URB back to the USB core. It calls the
* the urb complete function if exist, and also handles the resubmition of
* interrupt URBs.
*
* Input: hci = data structure for the host controller
* urb = USB request block data structure
* resub_ok = resubmit flag: 1 = submit urb again, 0 = not submit
*
* Return: 0
**************************************************************************/
static int hcs_return_urb (hci_t * hci, struct urb * urb, int resub_ok)
{
struct usb_device *dev = urb->dev;
int resubmit = 0;
DBGFUNC ("enter hcs_return_urb, urb pointer = %p, "
"transferbuffer point = %p, "
" setup packet pointer = %p, context pointer = %p \n",
(__u32 *) urb, (__u32 *) urb->transfer_buffer,
(__u32 *) urb->setup_packet, (__u32 *) urb->context);
if (urb_debug)
urb_print (urb, "RET", usb_pipeout (urb->pipe));
resubmit = urb->interval && resub_ok;
urb->dev = urb->hcpriv = NULL;
if (urb->complete) {
urb->complete (urb); /* call complete */
}
if (resubmit) {
/* requeue the URB */
urb->dev = dev;
hcs_urb_queue (hci, urb);
}
return 0;
}
/***************************************************************************
* Function Name : hci_submit_urb
*
* This function is called by the USB core API when an URB is available to
* process. This function does the following
*
* 1) Check the validity of the URB
* 2) Parse the device number from the URB
* 3) Pass the URB to the root hub routine if its intended for the hub, else
* queue the urb for the attached device.
*
* Input: urb = USB request block data structure
*
* Return: 0 if success or error code
**************************************************************************/
static int hci_submit_urb (struct urb * urb)
{
hci_t *hci;
unsigned int pipe = urb->pipe;
unsigned long flags;
int ret;
DBGFUNC ("enter hci_submit_urb, pipe = 0x%x\n", urb->pipe);
if (!urb->dev || !urb->dev->bus || urb->hcpriv)
return -EINVAL;
if (usb_endpoint_halted
(urb->dev, usb_pipeendpoint (pipe), usb_pipeout (pipe))) {
printk ("hci_submit_urb: endpoint_halted\n");
return -EPIPE;
}
hci = (hci_t *) urb->dev->bus->hcpriv;
/* a request to the virtual root hub */
if (usb_pipedevice (pipe) == hci->rh.devnum) {
if (urb_debug > 1)
urb_print (urb, "SUB-RH", usb_pipein (pipe));
return rh_submit_urb (urb);
}
/* queue the URB to its endpoint-queue */
spin_lock_irqsave (&usb_urb_lock, flags);
ret = hcs_urb_queue (hci, urb);
if (ret != 0) {
/* error on return */
DBGERR
("hci_submit_urb: return err, ret = 0x%x, urb->status = 0x%x\n",
ret, urb->status);
}
spin_unlock_irqrestore (&usb_urb_lock, flags);
return ret;
}
/***************************************************************************
* Function Name : hci_unlink_urb
*
* This function mark the URB to unlink
*
* Input: urb = USB request block data structure
*
* Return: 0 if success or error code
**************************************************************************/
static int hci_unlink_urb (struct urb * urb)
{
unsigned long flags;
hci_t *hci;
DECLARE_WAITQUEUE (wait, current);
void *comp = NULL;
DBGFUNC ("enter hci_unlink_urb\n");
if (!urb) /* just to be sure */
return -EINVAL;
if (!urb->dev || !urb->dev->bus)
return -ENODEV;
hci = (hci_t *) urb->dev->bus->hcpriv;
/* a request to the virtual root hub */
if (usb_pipedevice (urb->pipe) == hci->rh.devnum) {
return rh_unlink_urb (urb);
}
if (urb_debug)
urb_print (urb, "UNLINK", 1);
spin_lock_irqsave (&usb_urb_lock, flags);
if (!list_empty (&urb->urb_list) && urb->status == -EINPROGRESS) {
/* URB active? */
if (urb->
transfer_flags & (USB_ASYNC_UNLINK | USB_TIMEOUT_KILLED)) {
/* asynchron with callback */
list_del (&urb->urb_list); /* relink the urb to the del list */
list_add (&urb->urb_list, &hci->del_list);
spin_unlock_irqrestore (&usb_urb_lock, flags);
} else {
/* synchron without callback */
add_wait_queue (&hci->waitq, &wait);
set_current_state (TASK_UNINTERRUPTIBLE);
comp = urb->complete;
urb->complete = NULL;
/* --> crash --> */ list_del (&urb->urb_list); /* relink the urb to the del list */
list_add (&urb->urb_list, &hci->del_list);
spin_unlock_irqrestore (&usb_urb_lock, flags);
schedule_timeout (HZ / 50);
if (!list_empty (&urb->urb_list))
list_del (&urb->urb_list);
urb->complete = comp;
urb->hcpriv = NULL;
remove_wait_queue (&hci->waitq, &wait);
}
} else {
/* hcd does not own URB but we keep the driver happy anyway */
spin_unlock_irqrestore (&usb_urb_lock, flags);
if (urb->complete && (urb->transfer_flags & USB_ASYNC_UNLINK)) {
urb->status = -ENOENT;
urb->actual_length = 0;
urb->complete (urb);
urb->status = 0;
} else {
urb->status = -ENOENT;
}
}
return 0;
}
/***************************************************************************
* Function Name : hci_alloc_dev
*
* This function allocates private data space for the usb device and
* initialize the endpoint descriptor heads.
*
* Input: usb_dev = pointer to the usb device
*
* Return: 0 if success or error code
**************************************************************************/
static int hci_alloc_dev (struct usb_device *usb_dev)
{
struct hci_device *dev;
int i;
DBGFUNC ("enter hci_alloc_dev\n");
dev = kmalloc (sizeof (*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
memset (dev, 0, sizeof (*dev));
for (i = 0; i < 32; i++) {
INIT_LIST_HEAD (&(dev->ed[i].urb_queue));
dev->ed[i].pipe_head = NULL;
}
usb_dev->hcpriv = dev;
DBGVERBOSE ("USB HC dev alloc %d bytes\n", sizeof (*dev));
return 0;
}
/***************************************************************************
* Function Name : hci_free_dev
*
* This function de-allocates private data space for the usb devic
*
* Input: usb_dev = pointer to the usb device
*
* Return: 0
**************************************************************************/
static int hci_free_dev (struct usb_device *usb_dev)
{
DBGFUNC ("enter hci_free_dev\n");
if (usb_dev->hcpriv)
kfree (usb_dev->hcpriv);
usb_dev->hcpriv = NULL;
return 0;
}
/***************************************************************************
* Function Name : hci_get_current_frame_number
*
* This function get the current USB frame number
*
* Input: usb_dev = pointer to the usb device
*
* Return: frame number
**************************************************************************/
static int hci_get_current_frame_number (struct usb_device *usb_dev)
{
hci_t *hci = usb_dev->bus->hcpriv;
DBGFUNC ("enter hci_get_current_frame_number, frame = 0x%x \r\n",
hci->frame_number);
return (hci->frame_number);
}
/***************************************************************************
* List of all io-functions
**************************************************************************/
static struct usb_operations hci_device_operations = {
allocate: hci_alloc_dev,
deallocate: hci_free_dev,
get_frame_number: hci_get_current_frame_number,
submit_urb: hci_submit_urb,
unlink_urb: hci_unlink_urb,
};
/***************************************************************************
* URB queueing:
*
* For each type of transfer (INTR, BULK, ISO, CTRL) there is a list of
* active URBs.
* (hci->intr_list, hci->bulk_list, hci->iso_list, hci->ctrl_list)
* For every endpoint the head URB of the queued URBs is linked to one of
* those lists.
*
* The rest of the queued URBs of an endpoint are linked into a
* private URB list for each endpoint. (hci_dev->ed [endpoint_io].urb_queue)
* hci_dev->ed [endpoint_io].pipe_head .. points to the head URB which is
* in one of the active URB lists.
*
* The index of an endpoint consists of its number and its direction.
*
* The state of an intr and iso URB is 0.
* For ctrl URBs the states are US_CTRL_SETUP, US_CTRL_DATA, US_CTRL_ACK
* Bulk URBs states are US_BULK and US_BULK0 (with 0-len packet)
*
**************************************************************************/
/***************************************************************************
* Function Name : qu_urb_timeout
*
* This function is called when the URB timeout. The function unlinks the
* URB.
*
* Input: lurb: URB
*
* Return: none
**************************************************************************/
#ifdef HC_URB_TIMEOUT
static void qu_urb_timeout (unsigned long lurb)
{
struct urb *urb = (struct urb *) lurb;
DBGFUNC ("enter qu_urb_timeout\n");
urb->transfer_flags |= USB_TIMEOUT_KILLED;
hci_unlink_urb (urb);
}
#endif
/***************************************************************************
* Function Name : qu_pipeindex
*
* This function gets the index of the pipe.
*
* Input: pipe: the urb pipe
*
* Return: index
**************************************************************************/
static inline int qu_pipeindex (__u32 pipe)
{
DBGFUNC ("enter qu_pipeindex\n");
return (usb_pipeendpoint (pipe) << 1) | (usb_pipecontrol (pipe) ? 0 : usb_pipeout (pipe));
}
/***************************************************************************
* Function Name : qu_seturbstate
*
* This function set the state of the URB.
*
* control pipe: 3 states -- Setup, data, status
* interrupt and bulk pipe: 1 state -- data
*
* Input: urb = USB request block data structure
* state = the urb state
*
* Return: none
**************************************************************************/
static inline void qu_seturbstate (struct urb * urb, int state)
{
DBGFUNC ("enter qu_seturbstate\n");
urb->pipe &= ~0x1f;
urb->pipe |= state & 0x1f;
}
/***************************************************************************
* Function Name : qu_urbstate
*
* This function get the current state of the URB.
*
* Input: urb = USB request block data structure
*
* Return: none
**************************************************************************/
static inline int qu_urbstate (struct urb * urb)
{
DBGFUNC ("enter qu_urbstate\n");
return urb->pipe & 0x1f;
}
/***************************************************************************
* Function Name : qu_queue_active_urb
*
* This function adds the urb to the appropriate active urb list and set
* the urb state.
*
* There are four active lists: isochoronous list, interrupt list,
* control list, and bulk list.
*
* Input: hci = data structure for the host controller
* urb = USB request block data structure
* ed = endpoint descriptor
*
* Return: none
**************************************************************************/
static inline void qu_queue_active_urb (hci_t * hci, struct urb * urb, epd_t * ed)
{
int urb_state = 0;
DBGFUNC ("enter qu_queue_active_urb\n");
switch (usb_pipetype (urb->pipe)) {
case PIPE_CONTROL:
list_add (&urb->urb_list, &hci->ctrl_list);
urb_state = US_CTRL_SETUP;
break;
case PIPE_BULK:
list_add (&urb->urb_list, &hci->bulk_list);
if ((urb->transfer_flags & USB_ZERO_PACKET)
&& urb->transfer_buffer_length > 0
&&
((urb->transfer_buffer_length %
usb_maxpacket (urb->dev, urb->pipe,
usb_pipeout (urb->pipe))) == 0)) {
urb_state = US_BULK0;
}
break;
case PIPE_INTERRUPT:
urb->start_frame = hci->frame_number;
list_add (&urb->urb_list, &hci->intr_list);
break;
case PIPE_ISOCHRONOUS:
list_add (&urb->urb_list, &hci->iso_list);
break;
}
#ifdef HC_URB_TIMEOUT
if (urb->timeout) {
ed->timeout.data = (unsigned long) urb;
ed->timeout.expires = urb->timeout + jiffies;
ed->timeout.function = qu_urb_timeout;
add_timer (&ed->timeout);
}
#endif
qu_seturbstate (urb, urb_state);
}
/***************************************************************************
* Function Name : qu_queue_urb
*
* This function adds the urb to the endpoint descriptor list
*
* Input: hci = data structure for the host controller
* urb = USB request block data structure
*
* Return: none
**************************************************************************/
static int qu_queue_urb (hci_t * hci, struct urb * urb)
{
struct hci_device *hci_dev = usb_to_hci (urb->dev);
epd_t *ed = &hci_dev->ed[qu_pipeindex (urb->pipe)];
DBGFUNC ("Enter qu_queue_urb\n");
/* for ISOC transfers calculate start frame index */
if (usb_pipeisoc (urb->pipe) && urb->transfer_flags & USB_ISO_ASAP) {
urb->start_frame = ((ed->pipe_head) ? (ed->last_iso + 1) : hci_get_current_frame_number (urb-> dev) + 1) & 0xffff;
}
if (ed->pipe_head) {
__list_add (&urb->urb_list, ed->urb_queue.prev,
&(ed->urb_queue));
} else {
ed->pipe_head = urb;
qu_queue_active_urb (hci, urb, ed);
if (++hci->active_urbs == 1)
hc_start_int (hci);
}
return 0;
}
/***************************************************************************
* Function Name : qu_next_urb
*
* This function removes the URB from the queue and add the next URB to
* active list.
*
* Input: hci = data structure for the host controller
* urb = USB request block data structure
* resub_ok = resubmit flag
*
* Return: pointer to the next urb
**************************************************************************/
static struct urb *qu_next_urb (hci_t * hci, struct urb * urb, int resub_ok)
{
struct hci_device *hci_dev = usb_to_hci (urb->dev);
epd_t *ed = &hci_dev->ed[qu_pipeindex (urb->pipe)];
DBGFUNC ("enter qu_next_urb\n");
list_del (&urb->urb_list);
INIT_LIST_HEAD (&urb->urb_list);
if (ed->pipe_head == urb) {
#ifdef HC_URB_TIMEOUT
if (urb->timeout)
del_timer (&ed->timeout);
#endif
if (!--hci->active_urbs)
hc_stop_int (hci);
if (!list_empty (&ed->urb_queue)) {
urb = list_entry (ed->urb_queue.next, struct urb, urb_list);
list_del (&urb->urb_list);
INIT_LIST_HEAD (&urb->urb_list);
ed->pipe_head = urb;
qu_queue_active_urb (hci, urb, ed);
} else {
ed->pipe_head = NULL;
urb = NULL;
}
}
return urb;
}
/***************************************************************************
* Function Name : qu_return_urb
*
* This function is part of the return path.
*
* Input: hci = data structure for the host controller
* urb = USB request block data structure
* resub_ok = resubmit flag
*
* Return: pointer to the next urb
**************************************************************************/
static struct urb *qu_return_urb (hci_t * hci, struct urb * urb, int resub_ok)
{
struct urb *next_urb;
DBGFUNC ("enter qu_return_rub\n");
next_urb = qu_next_urb (hci, urb, resub_ok);
hcs_return_urb (hci, urb, resub_ok);
return next_urb;
}
#if 0 /* unused now (hne) */
/***************************************************************************
* Function Name : sh_scan_iso_urb_list
*
* This function goes throught the isochronous urb list and schedule the
* the transfer.
*
* Note: This function has not tested yet
*
* Input: hci = data structure for the host controller
* list_lh = pointer to the isochronous list
* frame_number = the frame number
*
* Return: 0 = unsuccessful; 1 = successful
**************************************************************************/
static int sh_scan_iso_urb_list (hci_t * hci, struct list_head *list_lh,
int frame_number)
{
struct list_head *lh = list_lh->next;
struct urb *urb;
DBGFUNC ("enter sh_scan_iso_urb_list\n");
hci->td_array->len = 0;
while (lh != list_lh) {
urb = list_entry (lh, struct urb, urb_list);
lh = lh->next;
if (((frame_number - urb->start_frame) & 0x7ff) <
urb->number_of_packets) {
if (!sh_add_packet (hci, urb)) {
return 0;
} else {
if (((frame_number -
urb->start_frame) & 0x7ff) > 0x400) {
if (qu_urbstate (urb) > 0)
urb = qu_return_urb (hci, urb, 1);
else
urb = qu_next_urb (hci, urb, 1);
if (lh == list_lh && urb)
lh = &urb->urb_list;
}
}
}
}
return 1;
}
#endif // if0
/***************************************************************************
* Function Name : sh_scan_urb_list
*
* This function goes through the urb list and schedule the
* the transaction.
*
* Input: hci = data structure for the host controller
* list_lh = pointer to the isochronous list
*
* Return: 0 = unsuccessful; 1 = successful
**************************************************************************/
static int sh_scan_urb_list (hci_t * hci, struct list_head *list_lh)
{
struct list_head *lh = NULL;
struct urb *urb;
if (list_lh == NULL) {
DBGERR ("sh_scan_urb_list: error, list_lh == NULL\n");
}
DBGFUNC ("enter sh_scan_urb_list: frame# \n");
list_for_each (lh, list_lh) {
urb = list_entry (lh, struct urb, urb_list);
if (urb == NULL)
return 1;
if (!usb_pipeint (urb->pipe)
|| (((hci->frame_number - urb->start_frame)
& 0x7ff) >= urb->interval)) {
DBGVERBOSE ("sh_scan_urb_list !INT: %d fr_no: %d int: %d pint: %d\n",
urb->start_frame, hci->frame_number, urb->interval,
usb_pipeint (urb->pipe));
if (!sh_add_packet (hci, urb)) {
return 0;
} else {
DBGVERBOSE ("INT: start: %d fr_no: %d int: %d pint: %d\n",
urb->start_frame, hci->frame_number,
urb->interval, usb_pipeint (urb->pipe));
urb->start_frame = hci->frame_number;
return 0;
}
}
}
return 1;
}
/***************************************************************************
* Function Name : sh_shedule_trans
*
* This function schedule the USB transaction.
* This function will process the endpoint in the following order:
* interrupt, control, and bulk.
*
* Input: hci = data structure for the host controller
* isSOF = flag indicate if Start Of Frame has occurred
*
* Return: 0
**************************************************************************/
static int sh_schedule_trans (hci_t * hci, int isSOF)
{
int units_left = 1;
struct list_head *lh;
if (hci == NULL) {
DBGERR ("sh_schedule_trans: hci == NULL\n");
return 0;
}
if (hci->td_array == NULL) {
DBGERR ("sh_schedule_trans: hci->td_array == NULL\n");
return 0;
}
if (hci->td_array->len != 0) {
DBGERR ("ERROR: schedule, hci->td_array->len = 0x%x, s/b: 0\n",
hci->td_array->len);
}
/* schedule the next available interrupt transfer or the next
* stage of the interrupt transfer */
if (hci->td_array->len == 0 && !list_empty (&hci->intr_list)) {
units_left = sh_scan_urb_list (hci, &hci->intr_list);
}
/* schedule the next available control transfer or the next
* stage of the control transfer */
if (hci->td_array->len == 0 && !list_empty (&hci->ctrl_list) && units_left > 0) {
units_left = sh_scan_urb_list (hci, &hci->ctrl_list);
}
/* schedule the next available bulk transfer or the next
* stage of the bulk transfer */
if (hci->td_array->len == 0 && !list_empty (&hci->bulk_list) && units_left > 0) {
sh_scan_urb_list (hci, &hci->bulk_list);
/* be fair to each BULK URB (move list head around)
* only when the new SOF happens */
lh = hci->bulk_list.next;
list_del (&hci->bulk_list);
list_add (&hci->bulk_list, lh);
}
return 0;
}
/***************************************************************************
* Function Name : sh_add_packet
*
* This function forms the packet and transmit the packet. This function
* will handle all endpoint type: isochoronus, interrupt, control, and
* bulk.
*
* Input: hci = data structure for the host controller
* urb = USB request block data structure
*
* Return: 0 = unsucessful; 1 = successful
**************************************************************************/
static int sh_add_packet (hci_t * hci, struct urb * urb)
{
__u8 *data = NULL;
int len = 0;
int toggle = 0;
int maxps = usb_maxpacket (urb->dev, urb->pipe, usb_pipeout (urb->pipe));
int endpoint = usb_pipeendpoint (urb->pipe);
int address = usb_pipedevice (urb->pipe);
int slow = (((urb->pipe) >> 26) & 1);
int out = usb_pipeout (urb->pipe);
int pid = 0;
int ret;
int i = 0;
int iso = 0;
DBGFUNC ("enter sh_add_packet\n");
if (maxps == 0)
maxps = 8;
/* calculate len, toggle bit and add the transaction */
switch (usb_pipetype (urb->pipe)) {
case PIPE_ISOCHRONOUS:
pid = out ? PID_OUT : PID_IN;
iso = 1;
i = hci->frame_number - urb->start_frame;
data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
len = urb->iso_frame_desc[i].length;
break;
case PIPE_BULK: /* BULK and BULK0 */
case PIPE_INTERRUPT:
pid = out ? PID_OUT : PID_IN;
len = urb->transfer_buffer_length - urb->actual_length;
data = urb->transfer_buffer + urb->actual_length;
toggle = usb_gettoggle (urb->dev, endpoint, out);
break;
case PIPE_CONTROL:
switch (qu_urbstate (urb)) {
case US_CTRL_SETUP:
len = 8;
pid = PID_SETUP;
data = urb->setup_packet;
toggle = 0;
break;
case US_CTRL_DATA:
if (!hci->last_packet_nak) {
/* The last packet received is not a nak:
* reset the nak count
*/
hci->nakCnt = 0;
}
if (urb->transfer_buffer_length != 0) {
pid = out ? PID_OUT : PID_IN;
len = urb->transfer_buffer_length - urb->actual_length;
data = urb->transfer_buffer + urb->actual_length;
toggle = (urb->actual_length & maxps) ? 0 : 1;
usb_settoggle (urb->dev,
usb_pipeendpoint (urb->pipe),
usb_pipeout (urb->pipe), toggle);
break;
} else {
/* correct state and fall through */
qu_seturbstate (urb, US_CTRL_ACK);
}
case US_CTRL_ACK:
len = 0;
/* reply in opposite direction */
pid = !out ? PID_OUT : PID_IN;
toggle = 1;
usb_settoggle (urb->dev, usb_pipeendpoint (urb->pipe),
usb_pipeout (urb->pipe), toggle);
break;
}
}
ret =
hc_add_trans (hci, len, data, toggle, maxps, slow, endpoint,
address, pid, iso, qu_urbstate (urb));
DBGVERBOSE ("transfer_pa: addr:%d ep:%d pid:%x tog:%x iso:%x sl:%x "
"max:%d\n len:%d ret:%d data:%p left:%d\n",
address, endpoint, pid, toggle, iso, slow,
maxps, len, ret, data, hci->hp.units_left);
if (ret >= 0) {
hci->td_array->td[hci->td_array->len].urb = urb;
hci->td_array->td[hci->td_array->len].len = ret;
hci->td_array->td[hci->td_array->len].iso_index = i;
hci->td_array->len++;
hci->active_trans = 1;
return 1;
}
return 0;
}
/***************************************************************************
* Function Name : cc_to_error
*
* This function maps the SL811HS hardware error code to the linux USB error
* code.
*
* Input: cc = hardware error code
*
* Return: USB error code
**************************************************************************/
static int cc_to_error (int cc)
{
int errCode = 0;
if (cc & SL11H_STATMASK_ERROR) {
errCode |= -EILSEQ;
} else if (cc & SL11H_STATMASK_OVF) {
errCode |= -EOVERFLOW;
} else if (cc & SL11H_STATMASK_STALL) {
errCode |= -EPIPE;
}
return errCode;
}
/***************************************************************************
* Function Name : sh_done_list
*
* This function process the packet when it has done finish transfer.
*
* 1) It handles hardware error
* 2) It updates the URB state
* 3) If the USB transaction is complete, it start the return stack path.
*
* Input: hci = data structure for the host controller
* isExcessNak = flag tells if there excess NAK condition occurred
*
* Return: urb_state or -1 if the transaction has complete
**************************************************************************/
static int sh_done_list (hci_t * hci, int *isExcessNak)
{
int actbytes = 0;
int active = 0;
void *data = NULL;
int cc;
int maxps;
int toggle;
struct urb *urb;
int urb_state = 0;
int ret = 1; /* -1 parse abbort, 1 parse ok, 0 last element */
int trans = 0;
int len;
int iso_index = 0;
int out;
int pid = 0;
int debugLen = 0;
*isExcessNak = 0;
DBGFUNC ("enter sh_done_list: td_array->len = 0x%x\n",
hci->td_array->len);
debugLen = hci->td_array->len;
if (debugLen > 1)
DBGERR ("sh_done_list: td_array->len = 0x%x > 1\n",
hci->td_array->len);
for (trans = 0; ret && trans < hci->td_array->len && trans < MAX_TRANS;
trans++) {
urb = hci->td_array->td[trans].urb;
/* FIXME: */
/* +++ I'm sorry, can't handle NULL-Pointers 21.11.2002 (hne) */
if (!urb) {
DBGERR ("sh_done_list: urb = NULL\n");
continue;
}
if (!urb->dev || !urb->pipe) {
if (!urb->dev) DBGERR ("sh_done_list: urb->dev = NULL\n");
if (!urb->pipe) DBGERR ("sh_done_list: urb->pipe = NULL\n");
continue;
}
/* --- 21.11.2002 (hne) */
len = hci->td_array->td[trans].len;
out = usb_pipeout (urb->pipe);
if (usb_pipeisoc (urb->pipe)) {
iso_index = hci->td_array->td[trans].iso_index;
data = urb->transfer_buffer + urb->iso_frame_desc[iso_index].offset;
toggle = 0;
} else {
data = urb->transfer_buffer + urb->actual_length;
/* +++ Crash (hne) urb->dev == NULL !!! */
toggle = usb_gettoggle (urb->dev,
usb_pipeendpoint (urb->pipe),
usb_pipeout (urb->pipe));
/* --- Crash (hne) urb->dev == NULL !!! */
}
urb_state = qu_urbstate (urb);
pid = out ? PID_OUT : PID_IN;
ret = hc_parse_trans (hci, &actbytes, data, &cc, &toggle, len,
pid, urb_state);
maxps = usb_maxpacket (urb->dev, urb->pipe, usb_pipeout (urb->pipe));
if (maxps == 0)
maxps = 8;
active = (urb_state != US_CTRL_SETUP) && (actbytes && !(actbytes & (maxps - 1)));
/* If the transfer is not bulk in, then it is necessary to get all
* data specify by the urb->transfer_len.
*/
if (!(usb_pipebulk (urb->pipe) && usb_pipein (urb->pipe)))
active = active && (urb->transfer_buffer_length != urb->actual_length + actbytes);
if (urb->transfer_buffer_length == urb->actual_length + actbytes)
active = 0;
if ((cc &
(SL11H_STATMASK_ERROR | SL11H_STATMASK_TMOUT |
SL11H_STATMASK_OVF | SL11H_STATMASK_STALL))
&& !(cc & SL11H_STATMASK_NAK)) {
if (++urb->error_count > 3) {
DBGERR ("done_list: excessive error: errcount = 0x%x, cc = 0x%x\n",
urb->error_count, cc);
urb_state = 0;
active = 0;
} else {
DBGERR ("done_list: packet err, cc=0x%x, "
" urb->length=0x%x, actual_len=0x%x,"
" urb_state=0x%x\n",
cc, urb->transfer_buffer_length,
urb->actual_length, urb_state);
// if (cc & SL11H_STATMASK_STALL) {
/* The USB function is STALLED on a control pipe (0),
* then it needs to send the SETUP command again to
* clear the STALL condition
*/
// if (usb_pipeendpoint (urb->pipe) == 0) {
// urb_state = 2;
// active = 0;
// }
// } else
active = 1;
}
} else {
if (cc & SL11H_STATMASK_NAK) {
if (hci->nakCnt < 0x10000) {
hci->nakCnt++;
hci->last_packet_nak = 1;
active = 1;
*isExcessNak = 0;
} else {
DBGERR ("done_list: nak count exceed limit\n");
active = 0;
*isExcessNak = 1;
hci->nakCnt = 0;
}
} else {
hci->nakCnt = 0;
hci->last_packet_nak = 0;
}
if (urb_state != US_CTRL_SETUP) {
/* no error */
urb->actual_length += actbytes;
usb_settoggle (urb->dev,
usb_pipeendpoint (urb->pipe),
usb_pipeout (urb->pipe), toggle);
}
if (usb_pipeisoc (urb->pipe)) {
urb->iso_frame_desc[iso_index].actual_length = actbytes;
urb->iso_frame_desc[iso_index].status = cc_to_error (cc);
active = (iso_index < urb->number_of_packets);
}
}
if (!active) {
if (!urb_state) {
urb->status = cc_to_error (cc);
if (urb->status) {
DBGERR ("error on received packet: urb->status = 0x%x\n",
urb->status);
}
hci->td_array->len = 0;
qu_return_urb (hci, urb, 1);
return -1;
} else {
/* We do not want to decrement the urb_state if exceeded nak,
* because we need to finish the data stage of the control
* packet
*/
if (!(*isExcessNak))
urb_state--;
qu_seturbstate (urb, urb_state);
}
}
}
if (urb_state < 0)
DBGERR ("ERROR: done_list, urb_state = %d, suppose > 0\n",
urb_state);
if (debugLen != hci->td_array->len) {
DBGERR ("ERROR: done_list, debugLen!= td_array->len,"
"debugLen = 0x%x, hci->td_array->len = 0x%x\n",
debugLen, hci->td_array->len);
}
hci->td_array->len = 0;
return urb_state;
}
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