usr/src/cmd/xhci/xhci_portsc.c

   1 /*
   2  * This file and its contents are supplied under the terms of the
   3  * Common Development and Distribution License ("CDDL"), version 1.0.
   4  * You may only use this file in accordance with the terms of version
   5  * 1.0 of the CDDL.
   6  *
   7  * A full copy of the text of the CDDL should have accompanied this
   8  * source.  A copy of the CDDL is also available via the Internet at
   9  * http://www.illumos.org/license/CDDL.
  10  */
  11
  12 /*
  13  * Copyright 2016 Joyent, Inc.
  14  */
  15
  16 /*
  17  * This is a private utility that combines a number of minor debugging routines
  18  * for xhci.
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdarg.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <err.h>
  26 #include <string.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <fcntl.h>
  30 #include <libdevinfo.h>
  31 #include <sys/usb/hcd/xhci/xhci_ioctl.h>
  32 #include <sys/usb/hcd/xhci/xhcireg.h>
  33
  34 static char *xp_devpath = NULL;
  35 static int xp_npaths;
  36 static const char *xp_path;
  37 static const char *xp_state = NULL;
  38 static uint32_t xp_port;
  39 static boolean_t xp_verbose = B_FALSE;
  40 static boolean_t xp_clear = B_FALSE;
  41 static boolean_t xp_list = B_FALSE;
  42 extern const char *__progname;
  43
  44 static int
  45 xp_usage(const char *format, ...)
  46 {
  47         if (format != NULL) {
  48                 va_list alist;
  49
  50                 va_start(alist, format);
  51                 vwarnx(format, alist);
  52                 va_end(alist);
  53         }
  54
  55         (void) fprintf(stderr, "usage:  %s [-l] [-v] [-c] [-d path] [-p port] "
  56             "[-s state]\n", __progname);
  57         return (2);
  58 }
  59
  60 static const char *xp_pls_strings[] = {
  61         "U0",
  62         "U1",
  63         "U2",
  64         "U3 (suspended)",
  65         "Disabled",
  66         "RxDetect",
  67         "Inactive",
  68         "Polling",
  69         "Recovery",
  70         "Hot Reset",
  71         "Compliance Mode",
  72         "Test Mode",
  73         "Reserved",
  74         "Reserved",
  75         "Reserved",
  76         "Resume",
  77         NULL
  78 };
  79
  80 static void
  81 xp_dump_verbose(uint32_t portsc)
  82 {
  83         if (portsc & XHCI_PS_CCS)
  84                 (void) printf("\t\t\tCCS\n");
  85         if (portsc & XHCI_PS_PED)
  86                 (void) printf("\t\t\tPED\n");
  87         if (portsc & XHCI_PS_OCA)
  88                 (void) printf("\t\t\tOCA\n");
  89         if (portsc & XHCI_PS_PR)
  90                 (void) printf("\t\t\tPR\n");
  91         if (portsc & XHCI_PS_PP) {
  92                 (void) printf("\t\t\tPLS: %s (%d)\n",
  93                     xp_pls_strings[XHCI_PS_PLS_GET(portsc)],
  94                     XHCI_PS_PLS_GET(portsc));
  95                 (void) printf("\t\t\tPP\n");
  96         } else {
  97                 (void) printf("\t\t\tPLS: undefined (No PP)\n");
  98         }
  99
 100         if (XHCI_PS_SPEED_GET(portsc) != 0) {
 101                 (void) printf("\t\t\tPort Speed: ");
 102                 switch (XHCI_PS_SPEED_GET(portsc)) {
 103                 case 0:
 104                         (void) printf("Undefined ");
 105                         break;
 106                 case XHCI_SPEED_FULL:
 107                         (void) printf("Full ");
 108                         break;
 109                 case XHCI_SPEED_LOW:
 110                         (void) printf("Low ");
 111                         break;
 112                 case XHCI_SPEED_HIGH:
 113                         (void) printf("High ");
 114                         break;
 115                 case XHCI_SPEED_SUPER:
 116                         (void) printf("Super ");
 117                         break;
 118                 default:
 119                         (void) printf("Unknown ");
 120                         break;
 121                 }
 122                 (void) printf("(%d)\n", XHCI_PS_SPEED_GET(portsc));
 123         }
 124         if (XHCI_PS_PIC_GET(portsc) != 0)
 125                 (void) printf("\t\t\tPIC: %d\n", XHCI_PS_PIC_GET(portsc));
 126
 127         if (portsc & XHCI_PS_LWS)
 128                 (void) printf("\t\t\tLWS\n");
 129         if (portsc & XHCI_PS_CSC)
 130                 (void) printf("\t\t\tCSC\n");
 131         if (portsc & XHCI_PS_PEC)
 132                 (void) printf("\t\t\tPEC\n");
 133         if (portsc & XHCI_PS_WRC)
 134                 (void) printf("\t\t\tWRC\n");
 135         if (portsc & XHCI_PS_OCC)
 136                 (void) printf("\t\t\tOCC\n");
 137         if (portsc & XHCI_PS_PRC)
 138                 (void) printf("\t\t\tPRC\n");
 139         if (portsc & XHCI_PS_PLC)
 140                 (void) printf("\t\t\tPLC\n");
 141         if (portsc & XHCI_PS_CEC)
 142                 (void) printf("\t\t\tCEC\n");
 143         if (portsc & XHCI_PS_CAS)
 144                 (void) printf("\t\t\tCAS\n");
 145         if (portsc & XHCI_PS_WCE)
 146                 (void) printf("\t\t\tWCE\n");
 147         if (portsc & XHCI_PS_WDE)
 148                 (void) printf("\t\t\tWDE\n");
 149         if (portsc & XHCI_PS_WOE)
 150                 (void) printf("\t\t\tWOE\n");
 151         if (portsc & XHCI_PS_DR)
 152                 (void) printf("\t\t\tDR\n");
 153         if (portsc & XHCI_PS_WPR)
 154                 (void) printf("\t\t\tWPR\n");
 155 }
 156
 157 static void
 158 xp_dump(const char *path)
 159 {
 160         int fd, i;
 161         xhci_ioctl_portsc_t xhi = { 0 };
 162
 163         fd = open(path, O_RDWR);
 164         if (fd < 0) {
 165                 err(EXIT_FAILURE, "failed to open %s", path);
 166         }
 167
 168         if (ioctl(fd, XHCI_IOCTL_PORTSC, &xhi) != 0)
 169                 err(EXIT_FAILURE, "failed to get port status");
 170
 171         (void) close(fd);
 172
 173         for (i = 1; i <= xhi.xhi_nports; i++) {
 174                 if (xp_port != 0 && i != xp_port)
 175                         continue;
 176
 177                 (void) printf("port %2d:\t0x%08x\n", i, xhi.xhi_portsc[i]);
 178                 if (xp_verbose == B_TRUE)
 179                         xp_dump_verbose(xhi.xhi_portsc[i]);
 180         }
 181 }
 182
 183 static void
 184 xp_set_pls(const char *path, uint32_t port, const char *state)
 185 {
 186         int fd, i;
 187         xhci_ioctl_setpls_t xis;
 188
 189         fd = open(path, O_RDWR);
 190         if (fd < 0) {
 191                 err(EXIT_FAILURE, "failed to open %s", path);
 192         }
 193
 194         xis.xis_port = port;
 195         for (i = 0; xp_pls_strings[i] != NULL; i++) {
 196                 if (strcasecmp(state, xp_pls_strings[i]) == 0)
 197                         break;
 198         }
 199
 200         if (xp_pls_strings[i] == NULL) {
 201                 errx(EXIT_FAILURE, "unknown state string: %s\n", state);
 202         }
 203
 204         xis.xis_pls = i;
 205         (void) printf("setting port %d with pls %d\n", port, xis.xis_pls);
 206
 207         if (ioctl(fd, XHCI_IOCTL_SETPLS, &xis) != 0)
 208                 err(EXIT_FAILURE, "failed to set port status");
 209
 210         (void) close(fd);
 211 }
 212
 213 static void
 214 xp_clear_change(const char *path, uint32_t port)
 215 {
 216         int fd;
 217         xhci_ioctl_clear_t xic;
 218
 219         fd = open(path, O_RDWR);
 220         if (fd < 0) {
 221                 err(EXIT_FAILURE, "failed to open %s", path);
 222         }
 223
 224         xic.xic_port = port;
 225         (void) printf("clearing change bits on port %d\n", port);
 226         if (ioctl(fd, XHCI_IOCTL_CLEAR, &xic) != 0)
 227                 err(EXIT_FAILURE, "failed to set port status");
 228
 229         (void) close(fd);
 230 }
 231
 232 /* ARGSUSED */
 233 static int
 234 xp_devinfo_cb(di_node_t node, void *arg)
 235 {
 236         char *drv;
 237         di_minor_t minor;
 238         boolean_t *do_print = arg;
 239
 240         drv = di_driver_name(node);
 241         if (drv == NULL)
 242                 return (DI_WALK_CONTINUE);
 243         if (strcmp(drv, "xhci") != 0)
 244                 return (DI_WALK_CONTINUE);
 245
 246         /*
 247          * We have an instance of the xhci driver. We need to find the minor
 248          * node for the hubd instance. These are all usually greater than
 249          * HUBD_IS_ROOT_HUB. However, to avoid hardcoding that here, we instead
 250          * rely on the fact that the minor node for the actual device has a
 251          * :hubd as the intance.
 252          */
 253         minor = DI_MINOR_NIL;
 254         while ((minor = di_minor_next(node, minor)) != DI_MINOR_NIL) {
 255                 char *mname, *path;
 256
 257                 mname = di_minor_name(minor);
 258                 if (mname == NULL)
 259                         continue;
 260                 if (strcmp(mname, "hubd") != 0)
 261                         continue;
 262                 path = di_devfs_minor_path(minor);
 263                 if (*do_print == B_TRUE) {
 264                         (void) printf("/devices%s\n", path);
 265                         di_devfs_path_free(path);
 266                 } else {
 267                         xp_npaths++;
 268                         if (xp_devpath == NULL)
 269                                 xp_devpath = path;
 270                         else
 271                                 di_devfs_path_free(path);
 272                 }
 273         }
 274
 275         return (DI_WALK_PRUNECHILD);
 276 }
 277
 278 /*
 279  * We need to find all minor nodes of instances of the xhci driver whose name is
 280  * 'hubd'.
 281  */
 282 static void
 283 xp_find_devs(boolean_t print)
 284 {
 285         di_node_t root;
 286
 287         if ((root = di_init("/", DINFOCPYALL)) == DI_NODE_NIL) {
 288                 err(EXIT_FAILURE, "failed to initialize devices tree");
 289         }
 290
 291         if (di_walk_node(root, DI_WALK_CLDFIRST, &print, xp_devinfo_cb) != 0)
 292                 err(EXIT_FAILURE, "failed to walk devices tree");
 293 }
 294
 295 int
 296 main(int argc, char *argv[])
 297 {
 298         int c;
 299         char devpath[PATH_MAX];
 300
 301         while ((c = getopt(argc, argv, ":d:vlcp:s:")) != -1) {
 302                 switch (c) {
 303                 case 'c':
 304                         xp_clear = B_TRUE;
 305                         break;
 306                 case 'd':
 307                         xp_path = optarg;
 308                         break;
 309                 case 'l':
 310                         xp_list = B_TRUE;
 311                         break;
 312                 case 'v':
 313                         xp_verbose = B_TRUE;
 314                         break;
 315                 case 'p':
 316                         xp_port = atoi(optarg);
 317                         if (xp_port < 1 || xp_port > XHCI_PORTSC_NPORTS)
 318                                 return (xp_usage("invalid port for -p: %d\n",
 319                                     optarg));
 320                         break;
 321                 case 's':
 322                         xp_state = optarg;
 323                         break;
 324                 case ':':
 325                         return (xp_usage("-%c requires an operand\n", optopt));
 326                 case '?':
 327                         return (xp_usage("unknown option: -%c\n", optopt));
 328                 default:
 329                         abort();
 330                 }
 331         }
 332
 333         if (xp_list == B_TRUE && (xp_path != NULL || xp_clear == B_TRUE ||
 334             xp_port > 0 || xp_state != NULL)) {
 335                 return (xp_usage("-l cannot be used with other options\n"));
 336         }
 337
 338         if (xp_list == B_TRUE) {
 339                 xp_find_devs(B_TRUE);
 340                 return (0);
 341         }
 342
 343         if (xp_path == NULL) {
 344                 xp_find_devs(B_FALSE);
 345                 if (xp_npaths == 0) {
 346                         errx(EXIT_FAILURE, "no xhci devices found");
 347                 } else if (xp_npaths > 1) {
 348                         errx(EXIT_FAILURE, "more than one xhci device found, "
 349                             "please specify device with -d, use -l to list");
 350                 }
 351                 if (snprintf(devpath, sizeof (devpath), "/devices/%s",
 352                     xp_devpath) >= sizeof (devpath))
 353                         errx(EXIT_FAILURE, "xhci path found at %s overflows "
 354                             "internal device path");
 355                 di_devfs_path_free(xp_devpath);
 356                 xp_devpath = NULL;
 357                 xp_path = devpath;
 358         }
 359
 360         if (xp_clear == B_TRUE && xp_state != NULL) {
 361                 return (xp_usage("-c and -s can't be used together\n"));
 362         }
 363
 364         if (xp_state != NULL) {
 365                 xp_set_pls(xp_path, xp_port, xp_state);
 366         } else if (xp_clear == B_TRUE) {
 367                 xp_clear_change(xp_path, xp_port);
 368         } else {
 369                 xp_dump(xp_path);
 370         }
 371
 372         return (0);
 373 }