minix/lib/libusb/usb.c
Thomas Veerman a209c3ae12 Fix a ton of compiler warnings
This patch fixes most of current reasons to generate compiler warnings.
The changes consist of:
 - adding missing casts
 - hiding or unhiding function declarations
 - including headers where missing
 - add __UNCONST when assigning a const char * to a char *
 - adding missing return statements
 - changing some types from unsigned to signed, as the code seems to want
   signed ints
 - converting old-style function definitions to current style (i.e.,
   void func(param1, param2) short param1, param2; {...} to
   void func (short param1, short param2) {...})
 - making the compiler silent about signed vs unsigned comparisons. We
   have too many of those in the new libc to fix.

A number of bugs in the test set were fixed. These bugs were never
triggered with our old libc. Consequently, these tests are now forced to
link with the new libc or they will generate errors (in particular tests 43
and 55).

Most changes in NetBSD libc are limited to moving aroudn "#ifndef __minix"
or stuff related to Minix-specific things (code in sys-minix or gen/minix).
2011-11-14 10:07:49 +00:00

226 lines
5.4 KiB
C

#include <minix/config.h>
#include <minix/const.h>
#include <minix/usb.h>
#include <minix/com.h>
#include <minix/safecopies.h>
#include <minix/sysutil.h>
#include <minix/ds.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
PRIVATE struct usb_urb * pending_urbs = NULL;
PRIVATE endpoint_t hcd_ep;
FORWARD _PROTOTYPE( void _usb_urb_complete,
(struct usb_driver *ud, long urb_id));
/*****************************************************************************
* usb_send_urb *
****************************************************************************/
PUBLIC int usb_send_urb(struct usb_urb* urb)
{
message msg;
int res;
cp_grant_id_t gid;
if (urb == NULL) {
return EINVAL;
}
if (hcd_ep == 0) {
return EINVAL;
}
/* setup grant */
gid = cpf_grant_direct(hcd_ep,(vir_bytes) &urb->dev_id,
urb->urb_size - sizeof(void*),CPF_WRITE|CPF_READ);
if (gid == -1) {
printf("usb_send_urb: grant failed: "
"cpf_grant_direct(%d,%p,%d)\n", hcd_ep, urb, urb->urb_size);
return EINVAL;
}
urb->gid = gid;
/* prepare message */
msg.m_type = USB_RQ_SEND_URB;
msg.USB_GRANT_ID = gid;
msg.USB_GRANT_SIZE = urb->urb_size-sizeof(void*);
/* send message */
res = sendrec(hcd_ep, &msg);
if (res != 0) {
panic("usb_send_urb: could not talk to hcd: %d", res);
}
if (msg.m_type != USB_REPLY) {
panic("usb_send_urb: got illegal response from hcd: %d", msg.m_type);
}
if (msg.USB_RESULT != 0) {
panic("usb_send_urb: hcd could not enqueue URB: %d", msg.USB_RESULT);
}
/* everything ok, add urb to pending_urbs */
urb->urb_id = msg.USB_URB_ID;
urb->next = pending_urbs;
pending_urbs = urb;
/* done. */
/* (The HCD will send us a message when the URB is completed.) */
return res;
}
/*****************************************************************************
* usb_cancle_urb *
****************************************************************************/
PUBLIC int usb_cancle_urb(struct usb_urb* urb)
{
int res;
message msg;
if (urb == NULL) {
panic("usb_send_urb: urb == NULL!");
}
if (urb->urb_id == USB_INVALID_URB_ID) {
return EINVAL;
}
/* prepare message */
msg.m_type = USB_RQ_CANCEL_URB;
msg.USB_URB_ID = urb->urb_id;
/* send message */
res = sendrec(hcd_ep, &msg);
if (res != 0) {
panic("usb_cancle_urb: could not talk to hcd: %d", res);
}
if (msg.m_type != USB_REPLY) {
panic("usb_cancle_urb: got illegal response from hcd: %d", msg.m_type);
}
if (msg.USB_RESULT != 0) {
panic("usb_cancle_urb: got illegal response from hcd: %d", msg.m_type);
}
res = msg.USB_RESULT;
/* done. */
return res;
}
/*****************************************************************************
* usb_init *
****************************************************************************/
PUBLIC int usb_init(char *name)
{
int res;
message msg;
/* get the endpoint of the HCD */
res = ds_retrieve_label_endpt("usbd", &hcd_ep);
if (res != 0) {
panic("usb_init: ds_retrieve_label_endpt failed for 'usb': %d", res);
}
msg.m_type = USB_RQ_INIT;
strncpy(msg.USB_RB_INIT_NAME, name, M3_LONG_STRING);
res = sendrec(hcd_ep, &msg);
if (res != 0) {
panic("usb_init: can't talk to USB: %d", res);
}
if (msg.m_type != USB_REPLY) {
panic("usb_init: bad reply from USB: %d", msg.m_type);
}
if (msg.USB_RESULT != 0 ) {
panic("usb_init: init failed: %d", msg.USB_RESULT);
}
return 0;
}
/*****************************************************************************
* _usb_urb_complete *
****************************************************************************/
PRIVATE void _usb_urb_complete(struct usb_driver *ud, long urb_id)
{
/* find the corresponding URB in the urb_pending list. */
struct usb_urb * urb = NULL;
if (pending_urbs != NULL) {
if (pending_urbs->urb_id == urb_id) {
urb = pending_urbs;
pending_urbs = urb->next;
} else {
struct usb_urb *u = pending_urbs;
while (u->next) {
if (u->next->urb_id == urb_id) {
urb = u->next;
u->next = u->next->next;
urb->next = NULL;
break;
}
u = u->next;
}
}
}
/* Did we find a URB? */
if (urb != NULL) {
/* revoke grant */
cpf_revoke(urb->gid);
/* call completion handler */
#if 0
dump_urb(urb);
#endif
ud->urb_completion(urb);
} else {
printf("WARN: _usb_urb_complete: did not find URB with ID %ld", urb_id);
}
}
/*****************************************************************************
* usb_handle_msg *
****************************************************************************/
PUBLIC int usb_handle_msg(struct usb_driver *ud, message *msg)
{
/*
* we expect kind of messages:
* - new usb device
* - removed device
* - URB completed
*
* NOTE: the hcd driver doesn't expect replies for these messages.
*/
if (!ud) {
return -1;
}
switch(msg->m_type) {
case USB_COMPLETE_URB:
_usb_urb_complete(ud, msg->USB_URB_ID);
return 0;
case USB_ANNOUCE_DEV:
ud->connect_device(msg->USB_DEV_ID, msg->USB_INTERFACES);
return 0;
case USB_WITHDRAW_DEV:
ud->disconnect_device(msg->USB_DEV_ID);
return 0;
default:
panic("usb_handle_msg: bogus message from USB");
}
}