jackcartersmith/xilinx-usb-driver
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really support multiple parallel ports

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This commit is contained in:
michael 2007-04-01 15:47:52 +00:00
parent 1f62c14e4f
commit e6293f4578
2 changed files with 36 additions and 4 deletions
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34
usb-driver.c
View File

@ -46,9 +46,9 @@
static int (*ioctl_func) (int, int, void *) = NULL;
static int windrvrfd = -1;
static int parportfd = -1;
static int parportnum = 0;
static unsigned long ppbase = 0;
static unsigned long ecpbase = 0;
static struct pports *pplist = NULL;
FILE *modulesfp = NULL;
static int modules_read = 0;
static struct usb_bus *busses = NULL;
@ -376,10 +376,36 @@ int do_wdioctl(int fd, unsigned int request, unsigned char *wdioctl) {
ret = (*ioctl_func) (fd, request, wdioctl);
#else
if (parportfd < 0) {
if (ppbase && ((unsigned long)cr->Card.Item[0].I.IO.dwAddr != ppbase))
parportnum++;
int max = -1;
struct pports **port = &pplist;
snprintf(ppdev, sizeof(ppdev), "/dev/parport%d", parportnum);
while (*port) {
DPRINTF("Looking up parallel port in linked list, entry: %d\n", (*port)->num);
if (max < (*port)->num)
max = (*port)->num;
if ((*port)->base == (unsigned long)cr->Card.Item[0].I.IO.dwAddr) {
break;
}
port = &((*port)->next);
}
if (!(*port)) { /* not found */
(*port) = malloc(sizeof(struct pports));
if (!(*port)) {
perror("malloc");
exit(EXIT_FAILURE);
}
(*port)->base = (unsigned long)cr->Card.Item[0].I.IO.dwAddr;
(*port)->num = max+1;
(*port)->next = NULL;
DPRINTF("parallel port not in linked list, new entry: %d\n", (*port)->num);
}
snprintf(ppdev, sizeof(ppdev), "/dev/parport%d", (*port)->num);
DPRINTF("opening %s\n", ppdev);
parportfd = open(ppdev, O_RDWR|O_EXCL);

6
usb-driver.h
View File

@ -33,6 +33,12 @@
#define WDU_GET_MAX_PACKET_SIZE(x) ((unsigned short) (((x) & 0x7ff) * (1 + (((x) & 0x1800) >> 11))))
struct pports {
unsigned long base;
int num;
struct pports *next;
};
/* http://www.jungo.com/support/documentation/windriver/811/wdusb_man_mhtml/node78.html#SECTION001734000000000000000 */
struct header_struct {