Brian Swetland | 9c4c075 | 2009-01-25 16:23:50 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2009, Google Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * * Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * * Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in |
| 12 | * the documentation and/or other materials provided with the |
| 13 | * distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <debug.h> |
| 30 | #include <string.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <kernel/thread.h> |
| 33 | #include <kernel/event.h> |
| 34 | #include <dev/udc.h> |
| 35 | |
| 36 | void boot_linux(void *bootimg, unsigned sz); |
| 37 | |
| 38 | /* todo: give lk strtoul and nuke this */ |
| 39 | static unsigned hex2unsigned(const char *x) |
| 40 | { |
| 41 | unsigned n = 0; |
| 42 | |
| 43 | while(*x) { |
| 44 | switch(*x) { |
| 45 | case '0': case '1': case '2': case '3': case '4': |
| 46 | case '5': case '6': case '7': case '8': case '9': |
| 47 | n = (n << 4) | (*x - '0'); |
| 48 | break; |
| 49 | case 'a': case 'b': case 'c': |
| 50 | case 'd': case 'e': case 'f': |
| 51 | n = (n << 4) | (*x - 'a' + 10); |
| 52 | break; |
| 53 | case 'A': case 'B': case 'C': |
| 54 | case 'D': case 'E': case 'F': |
| 55 | n = (n << 4) | (*x - 'A' + 10); |
| 56 | break; |
| 57 | default: |
| 58 | return n; |
| 59 | } |
| 60 | x++; |
| 61 | } |
| 62 | |
| 63 | return n; |
| 64 | } |
| 65 | |
| 66 | struct fastboot_cmd { |
| 67 | struct fastboot_cmd *next; |
| 68 | const char *prefix; |
| 69 | unsigned prefix_len; |
| 70 | void (*handle)(const char *arg, void *data, unsigned sz); |
| 71 | }; |
| 72 | |
| 73 | struct fastboot_var { |
| 74 | struct fastboot_var *next; |
| 75 | const char *name; |
| 76 | const char *value; |
| 77 | }; |
| 78 | |
| 79 | static struct fastboot_cmd *cmdlist; |
| 80 | |
| 81 | void fastboot_register(const char *prefix, |
| 82 | void (*handle)(const char *arg, void *data, unsigned sz)) |
| 83 | { |
| 84 | struct fastboot_cmd *cmd; |
| 85 | cmd = malloc(sizeof(*cmd)); |
| 86 | if (cmd) { |
| 87 | cmd->prefix = prefix; |
| 88 | cmd->prefix_len = strlen(prefix); |
| 89 | cmd->handle = handle; |
| 90 | cmd->next = cmdlist; |
| 91 | cmdlist = cmd; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | static struct fastboot_var *varlist; |
| 96 | |
| 97 | void fastboot_publish(const char *name, const char *value) |
| 98 | { |
| 99 | struct fastboot_var *var; |
| 100 | var = malloc(sizeof(*var)); |
| 101 | if (var) { |
| 102 | var->name = name; |
| 103 | var->value = value; |
| 104 | var->next = varlist; |
| 105 | varlist = var; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | |
| 110 | static event_t usb_online; |
| 111 | static event_t txn_done; |
| 112 | static unsigned char buffer[4096]; |
| 113 | static struct udc_endpoint *in, *out; |
| 114 | static struct udc_request *req; |
| 115 | int txn_status; |
| 116 | |
| 117 | static void *download_base; |
| 118 | static unsigned download_max; |
| 119 | static unsigned download_size; |
| 120 | |
| 121 | #define STATE_OFFLINE 0 |
| 122 | #define STATE_COMMAND 1 |
| 123 | #define STATE_COMPLETE 2 |
| 124 | #define STATE_ERROR 3 |
| 125 | |
| 126 | static unsigned fastboot_state = STATE_OFFLINE; |
| 127 | |
| 128 | static void req_complete(struct udc_request *req, unsigned actual, int status) |
| 129 | { |
| 130 | txn_status = status; |
| 131 | req->length = actual; |
| 132 | event_signal(&txn_done, 0); |
| 133 | } |
| 134 | |
| 135 | static int usb_read(void *_buf, unsigned len) |
| 136 | { |
| 137 | int r; |
| 138 | unsigned xfer; |
| 139 | unsigned char *buf = _buf; |
| 140 | int count = 0; |
| 141 | |
| 142 | if (fastboot_state == STATE_ERROR) |
| 143 | goto oops; |
| 144 | |
| 145 | while (len > 0) { |
| 146 | xfer = (len > 4096) ? 4096 : len; |
| 147 | req->buf = buf; |
| 148 | req->length = xfer; |
| 149 | req->complete = req_complete; |
| 150 | r = udc_request_queue(out, req); |
| 151 | if (r < 0) { |
| 152 | dprintf(INFO, "usb_read() queue failed\n"); |
| 153 | goto oops; |
| 154 | } |
| 155 | event_wait(&txn_done); |
| 156 | |
| 157 | if (txn_status < 0) { |
| 158 | dprintf(INFO, "usb_read() transaction failed\n"); |
| 159 | goto oops; |
| 160 | } |
| 161 | |
| 162 | count += req->length; |
| 163 | buf += req->length; |
| 164 | len -= req->length; |
| 165 | |
| 166 | /* short transfer? */ |
| 167 | if (req->length != xfer) break; |
| 168 | } |
| 169 | |
| 170 | return count; |
| 171 | |
| 172 | oops: |
| 173 | fastboot_state = STATE_ERROR; |
| 174 | return -1; |
| 175 | } |
| 176 | |
| 177 | static int usb_write(void *buf, unsigned len) |
| 178 | { |
| 179 | int r; |
| 180 | |
| 181 | if (fastboot_state == STATE_ERROR) |
| 182 | goto oops; |
| 183 | |
| 184 | req->buf = buf; |
| 185 | req->length = len; |
| 186 | req->complete = req_complete; |
| 187 | r = udc_request_queue(in, req); |
| 188 | if (r < 0) { |
| 189 | dprintf(INFO, "usb_write() queue failed\n"); |
| 190 | goto oops; |
| 191 | } |
| 192 | event_wait(&txn_done); |
| 193 | if (txn_status < 0) { |
| 194 | dprintf(INFO, "usb_write() transaction failed\n"); |
| 195 | goto oops; |
| 196 | } |
| 197 | return req->length; |
| 198 | |
| 199 | oops: |
| 200 | fastboot_state = STATE_ERROR; |
| 201 | return -1; |
| 202 | } |
| 203 | |
| 204 | void fastboot_ack(const char *code, const char *reason) |
| 205 | { |
| 206 | char response[64]; |
| 207 | |
| 208 | if (fastboot_state != STATE_COMMAND) |
| 209 | return; |
| 210 | |
| 211 | if (reason == 0) |
| 212 | reason = ""; |
| 213 | |
| 214 | snprintf(response, 64, "%s%s", code, reason); |
| 215 | fastboot_state = STATE_COMPLETE; |
| 216 | |
| 217 | usb_write(response, strlen(response)); |
| 218 | |
| 219 | } |
| 220 | |
| 221 | void fastboot_fail(const char *reason) |
| 222 | { |
| 223 | fastboot_ack("FAIL", reason); |
| 224 | } |
| 225 | |
| 226 | void fastboot_okay(const char *info) |
| 227 | { |
| 228 | fastboot_ack("OKAY", info); |
| 229 | } |
| 230 | |
| 231 | static void cmd_getvar(const char *arg, void *data, unsigned sz) |
| 232 | { |
| 233 | struct fastboot_var *var; |
| 234 | |
| 235 | for (var = varlist; var; var = var->next) { |
| 236 | if (!strcmp(var->name, arg)) { |
| 237 | fastboot_okay(var->value); |
| 238 | return; |
| 239 | } |
| 240 | } |
| 241 | fastboot_okay(""); |
| 242 | } |
| 243 | |
| 244 | static void cmd_download(const char *arg, void *data, unsigned sz) |
| 245 | { |
| 246 | char response[64]; |
| 247 | unsigned len = hex2unsigned(arg); |
| 248 | int r; |
| 249 | |
| 250 | download_size = 0; |
| 251 | if (len > download_max) { |
| 252 | fastboot_fail("data too large"); |
| 253 | return; |
| 254 | } |
| 255 | |
| 256 | sprintf(response,"DATA%08x", len); |
| 257 | if (usb_write(response, strlen(response)) < 0) |
| 258 | return; |
| 259 | |
| 260 | r = usb_read(download_base, len); |
| 261 | if ((r < 0) || (r != len)) { |
| 262 | fastboot_state = STATE_ERROR; |
| 263 | return; |
| 264 | } |
| 265 | download_size = len; |
| 266 | fastboot_okay(""); |
| 267 | } |
| 268 | |
| 269 | static void fastboot_command_loop(void) |
| 270 | { |
| 271 | struct fastboot_cmd *cmd; |
| 272 | int r; |
| 273 | dprintf(INFO,"fastboot: processing commands\n"); |
| 274 | |
| 275 | again: |
| 276 | while (fastboot_state != STATE_ERROR) { |
| 277 | r = usb_read(buffer, 64); |
| 278 | if (r < 0) break; |
| 279 | buffer[r] = 0; |
| 280 | dprintf(INFO,"fastboot: %s\n", buffer); |
| 281 | |
| 282 | for (cmd = cmdlist; cmd; cmd = cmd->next) { |
| 283 | if (memcmp(buffer, cmd->prefix, cmd->prefix_len)) |
| 284 | continue; |
| 285 | fastboot_state = STATE_COMMAND; |
| 286 | cmd->handle((const char*) buffer + cmd->prefix_len, |
| 287 | (void*) download_base, download_size); |
| 288 | if (fastboot_state == STATE_COMMAND) |
| 289 | fastboot_fail("unknown reason"); |
| 290 | goto again; |
| 291 | } |
| 292 | |
| 293 | fastboot_fail("unknown command"); |
| 294 | |
| 295 | } |
| 296 | fastboot_state = STATE_OFFLINE; |
| 297 | dprintf(INFO,"fastboot: oops!\n"); |
| 298 | } |
| 299 | |
| 300 | static int fastboot_handler(void *arg) |
| 301 | { |
| 302 | for (;;) { |
| 303 | event_wait(&usb_online); |
| 304 | fastboot_command_loop(); |
| 305 | } |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | static void fastboot_notify(struct udc_gadget *gadget, unsigned event) |
| 310 | { |
| 311 | if (event == UDC_EVENT_ONLINE) { |
| 312 | event_signal(&usb_online, 0); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | static struct udc_endpoint *fastboot_endpoints[2]; |
| 317 | |
| 318 | static struct udc_gadget fastboot_gadget = { |
| 319 | .notify = fastboot_notify, |
| 320 | .ifc_class = 0xff, |
| 321 | .ifc_subclass = 0x42, |
| 322 | .ifc_protocol = 0x03, |
| 323 | .ifc_endpoints = 2, |
| 324 | .ifc_string = "fastboot", |
| 325 | .ept = fastboot_endpoints, |
| 326 | }; |
| 327 | |
| 328 | int fastboot_init(void *base, unsigned size) |
| 329 | { |
| 330 | thread_t *thr; |
| 331 | dprintf(INFO, "fastboot_init()\n"); |
| 332 | |
| 333 | download_base = base; |
| 334 | download_max = size; |
| 335 | |
| 336 | event_init(&usb_online, 0, EVENT_FLAG_AUTOUNSIGNAL); |
| 337 | event_init(&txn_done, 0, EVENT_FLAG_AUTOUNSIGNAL); |
| 338 | |
| 339 | in = udc_endpoint_alloc(UDC_TYPE_BULK_IN, 512); |
| 340 | if (!in) |
| 341 | goto fail_alloc_in; |
| 342 | out = udc_endpoint_alloc(UDC_TYPE_BULK_OUT, 512); |
| 343 | if (!out) |
| 344 | goto fail_alloc_out; |
| 345 | |
| 346 | fastboot_endpoints[0] = in; |
| 347 | fastboot_endpoints[1] = out; |
| 348 | |
| 349 | req = udc_request_alloc(); |
| 350 | if (!req) |
| 351 | goto fail_alloc_req; |
| 352 | |
| 353 | if (udc_register_gadget(&fastboot_gadget)) |
| 354 | goto fail_udc_register; |
| 355 | |
| 356 | fastboot_register("getvar:", cmd_getvar); |
| 357 | fastboot_register("download:", cmd_download); |
| 358 | fastboot_publish("version", "0.5"); |
| 359 | |
| 360 | thr = thread_create("fastboot", fastboot_handler, 0, DEFAULT_PRIORITY, 4096); |
| 361 | thread_resume(thr); |
| 362 | return 0; |
| 363 | |
| 364 | fail_udc_register: |
| 365 | udc_request_free(req); |
| 366 | fail_alloc_req: |
| 367 | udc_endpoint_free(out); |
| 368 | fail_alloc_out: |
| 369 | udc_endpoint_free(in); |
| 370 | fail_alloc_in: |
| 371 | return -1; |
| 372 | } |