util/uio_usbdebug/uio_usbdebug.c

   1 /* uio_usbdebug - Run coreboot's usbdebug driver in userspace */
   2 /* SPDX-License-Identifier: GPL-2.0-only */
   3
   4 #include <stdio.h>
   5 #include <sys/stat.h>
   6 #include <fcntl.h>
   7 #include <unistd.h>
   8 #include <sys/mman.h>
   9
  10 #include <pci/pci.h>
  11
  12 /* coreboot's arch/io.h conflicts with libc's sys/io.h, so declare this here: */
  13 int ioperm(unsigned long from, unsigned long num, int turn_on);
  14
  15 #include <arch/io.h>
  16 #include <console/usb.h>
  17
  18 void *ehci_bar;
  19 struct pci_access *pci_access;
  20
  21 int main(int argc, char *argv[])
  22 {
  23         if (argc != 2) {
  24                 fprintf(stderr, "Usage: %s <uio-dev>\n", argv[0]);
  25                 return 1;
  26         }
  27         const int fd = open(argv[1], O_RDWR);
  28         if (fd < 0) {
  29                 perror("Failed to open uio device");
  30                 return 2;
  31         }
  32         ehci_bar =
  33                 mmap(NULL, 1 << 8, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
  34         if (MAP_FAILED == ehci_bar) {
  35                 perror("Failed to map ehci bar");
  36                 close(fd);
  37                 return 3;
  38         }
  39
  40         ioperm(0x80, 1, 1);
  41
  42         pci_access = pci_alloc();
  43         pci_init(pci_access);
  44
  45         usbdebug_init();
  46
  47         pci_cleanup(pci_access);
  48         munmap(ehci_bar, 1 << 8);
  49         close(fd);
  50         return 0;
  51 }