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13#include <config.h>
14#include <common.h>
15#include <errno.h>
16#include <fastboot.h>
17#include <malloc.h>
18#include <linux/usb/ch9.h>
19#include <linux/usb/gadget.h>
20#include <linux/usb/composite.h>
21#include <linux/compiler.h>
22#include <version.h>
23#include <g_dnl.h>
24#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
25#include <fb_mmc.h>
26#endif
27#ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
28#include <fb_nand.h>
29#endif
30
31#define FASTBOOT_VERSION "0.4"
32
33#define FASTBOOT_INTERFACE_CLASS 0xff
34#define FASTBOOT_INTERFACE_SUB_CLASS 0x42
35#define FASTBOOT_INTERFACE_PROTOCOL 0x03
36
37#define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0 (0x0200)
38#define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1 (0x0040)
39#define TX_ENDPOINT_MAXIMUM_PACKET_SIZE (0x0040)
40
41#define EP_BUFFER_SIZE 4096
42
43
44
45
46
47
48struct f_fastboot {
49 struct usb_function usb_function;
50
51
52 struct usb_ep *in_ep, *out_ep;
53 struct usb_request *in_req, *out_req;
54};
55
56static inline struct f_fastboot *func_to_fastboot(struct usb_function *f)
57{
58 return container_of(f, struct f_fastboot, usb_function);
59}
60
61static struct f_fastboot *fastboot_func;
62static unsigned int download_size;
63static unsigned int download_bytes;
64
65static struct usb_endpoint_descriptor fs_ep_in = {
66 .bLength = USB_DT_ENDPOINT_SIZE,
67 .bDescriptorType = USB_DT_ENDPOINT,
68 .bEndpointAddress = USB_DIR_IN,
69 .bmAttributes = USB_ENDPOINT_XFER_BULK,
70 .wMaxPacketSize = cpu_to_le16(64),
71};
72
73static struct usb_endpoint_descriptor fs_ep_out = {
74 .bLength = USB_DT_ENDPOINT_SIZE,
75 .bDescriptorType = USB_DT_ENDPOINT,
76 .bEndpointAddress = USB_DIR_OUT,
77 .bmAttributes = USB_ENDPOINT_XFER_BULK,
78 .wMaxPacketSize = cpu_to_le16(64),
79};
80
81static struct usb_endpoint_descriptor hs_ep_in = {
82 .bLength = USB_DT_ENDPOINT_SIZE,
83 .bDescriptorType = USB_DT_ENDPOINT,
84 .bEndpointAddress = USB_DIR_IN,
85 .bmAttributes = USB_ENDPOINT_XFER_BULK,
86 .wMaxPacketSize = cpu_to_le16(512),
87};
88
89static struct usb_endpoint_descriptor hs_ep_out = {
90 .bLength = USB_DT_ENDPOINT_SIZE,
91 .bDescriptorType = USB_DT_ENDPOINT,
92 .bEndpointAddress = USB_DIR_OUT,
93 .bmAttributes = USB_ENDPOINT_XFER_BULK,
94 .wMaxPacketSize = cpu_to_le16(512),
95};
96
97static struct usb_interface_descriptor interface_desc = {
98 .bLength = USB_DT_INTERFACE_SIZE,
99 .bDescriptorType = USB_DT_INTERFACE,
100 .bInterfaceNumber = 0x00,
101 .bAlternateSetting = 0x00,
102 .bNumEndpoints = 0x02,
103 .bInterfaceClass = FASTBOOT_INTERFACE_CLASS,
104 .bInterfaceSubClass = FASTBOOT_INTERFACE_SUB_CLASS,
105 .bInterfaceProtocol = FASTBOOT_INTERFACE_PROTOCOL,
106};
107
108static struct usb_descriptor_header *fb_fs_function[] = {
109 (struct usb_descriptor_header *)&interface_desc,
110 (struct usb_descriptor_header *)&fs_ep_in,
111 (struct usb_descriptor_header *)&fs_ep_out,
112};
113
114static struct usb_descriptor_header *fb_hs_function[] = {
115 (struct usb_descriptor_header *)&interface_desc,
116 (struct usb_descriptor_header *)&hs_ep_in,
117 (struct usb_descriptor_header *)&hs_ep_out,
118 NULL,
119};
120
121static struct usb_endpoint_descriptor *
122fb_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
123 struct usb_endpoint_descriptor *hs)
124{
125 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
126 return hs;
127 return fs;
128}
129
130
131
132
133static const char fastboot_name[] = "Android Fastboot";
134
135static struct usb_string fastboot_string_defs[] = {
136 [0].s = fastboot_name,
137 { }
138};
139
140static struct usb_gadget_strings stringtab_fastboot = {
141 .language = 0x0409,
142 .strings = fastboot_string_defs,
143};
144
145static struct usb_gadget_strings *fastboot_strings[] = {
146 &stringtab_fastboot,
147 NULL,
148};
149
150static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
151static int strcmp_l1(const char *s1, const char *s2);
152
153
154static char *fb_response_str;
155
156void fastboot_fail(const char *reason)
157{
158 strncpy(fb_response_str, "FAIL\0", 5);
159 strncat(fb_response_str, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
160}
161
162void fastboot_okay(const char *reason)
163{
164 strncpy(fb_response_str, "OKAY\0", 5);
165 strncat(fb_response_str, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
166}
167
168static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
169{
170 int status = req->status;
171 if (!status)
172 return;
173 printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual);
174}
175
176static int fastboot_bind(struct usb_configuration *c, struct usb_function *f)
177{
178 int id;
179 struct usb_gadget *gadget = c->cdev->gadget;
180 struct f_fastboot *f_fb = func_to_fastboot(f);
181 const char *s;
182
183
184 id = usb_interface_id(c, f);
185 if (id < 0)
186 return id;
187 interface_desc.bInterfaceNumber = id;
188
189 id = usb_string_id(c->cdev);
190 if (id < 0)
191 return id;
192 fastboot_string_defs[0].id = id;
193 interface_desc.iInterface = id;
194
195 f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in);
196 if (!f_fb->in_ep)
197 return -ENODEV;
198 f_fb->in_ep->driver_data = c->cdev;
199
200 f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out);
201 if (!f_fb->out_ep)
202 return -ENODEV;
203 f_fb->out_ep->driver_data = c->cdev;
204
205 f->descriptors = fb_fs_function;
206
207 if (gadget_is_dualspeed(gadget)) {
208
209 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress;
210 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress;
211
212 f->hs_descriptors = fb_hs_function;
213 }
214
215 s = getenv("serial#");
216 if (s)
217 g_dnl_set_serialnumber((char *)s);
218
219 return 0;
220}
221
222static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f)
223{
224 memset(fastboot_func, 0, sizeof(*fastboot_func));
225}
226
227static void fastboot_disable(struct usb_function *f)
228{
229 struct f_fastboot *f_fb = func_to_fastboot(f);
230
231 usb_ep_disable(f_fb->out_ep);
232 usb_ep_disable(f_fb->in_ep);
233
234 if (f_fb->out_req) {
235 free(f_fb->out_req->buf);
236 usb_ep_free_request(f_fb->out_ep, f_fb->out_req);
237 f_fb->out_req = NULL;
238 }
239 if (f_fb->in_req) {
240 free(f_fb->in_req->buf);
241 usb_ep_free_request(f_fb->in_ep, f_fb->in_req);
242 f_fb->in_req = NULL;
243 }
244}
245
246static struct usb_request *fastboot_start_ep(struct usb_ep *ep)
247{
248 struct usb_request *req;
249
250 req = usb_ep_alloc_request(ep, 0);
251 if (!req)
252 return NULL;
253
254 req->length = EP_BUFFER_SIZE;
255 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE);
256 if (!req->buf) {
257 usb_ep_free_request(ep, req);
258 return NULL;
259 }
260
261 memset(req->buf, 0, req->length);
262 return req;
263}
264
265static int fastboot_set_alt(struct usb_function *f,
266 unsigned interface, unsigned alt)
267{
268 int ret;
269 struct usb_composite_dev *cdev = f->config->cdev;
270 struct usb_gadget *gadget = cdev->gadget;
271 struct f_fastboot *f_fb = func_to_fastboot(f);
272 const struct usb_endpoint_descriptor *d;
273
274 debug("%s: func: %s intf: %d alt: %d\n",
275 __func__, f->name, interface, alt);
276
277 d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out);
278 ret = usb_ep_enable(f_fb->out_ep, d);
279 if (ret) {
280 puts("failed to enable out ep\n");
281 return ret;
282 }
283
284 f_fb->out_req = fastboot_start_ep(f_fb->out_ep);
285 if (!f_fb->out_req) {
286 puts("failed to alloc out req\n");
287 ret = -EINVAL;
288 goto err;
289 }
290 f_fb->out_req->complete = rx_handler_command;
291
292 d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in);
293 ret = usb_ep_enable(f_fb->in_ep, d);
294 if (ret) {
295 puts("failed to enable in ep\n");
296 goto err;
297 }
298
299 f_fb->in_req = fastboot_start_ep(f_fb->in_ep);
300 if (!f_fb->in_req) {
301 puts("failed alloc req in\n");
302 ret = -EINVAL;
303 goto err;
304 }
305 f_fb->in_req->complete = fastboot_complete;
306
307 ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0);
308 if (ret)
309 goto err;
310
311 return 0;
312err:
313 fastboot_disable(f);
314 return ret;
315}
316
317static int fastboot_add(struct usb_configuration *c)
318{
319 struct f_fastboot *f_fb = fastboot_func;
320 int status;
321
322 debug("%s: cdev: 0x%p\n", __func__, c->cdev);
323
324 if (!f_fb) {
325 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb));
326 if (!f_fb)
327 return -ENOMEM;
328
329 fastboot_func = f_fb;
330 memset(f_fb, 0, sizeof(*f_fb));
331 }
332
333 f_fb->usb_function.name = "f_fastboot";
334 f_fb->usb_function.bind = fastboot_bind;
335 f_fb->usb_function.unbind = fastboot_unbind;
336 f_fb->usb_function.set_alt = fastboot_set_alt;
337 f_fb->usb_function.disable = fastboot_disable;
338 f_fb->usb_function.strings = fastboot_strings;
339
340 status = usb_add_function(c, &f_fb->usb_function);
341 if (status) {
342 free(f_fb);
343 fastboot_func = f_fb;
344 }
345
346 return status;
347}
348DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add);
349
350static int fastboot_tx_write(const char *buffer, unsigned int buffer_size)
351{
352 struct usb_request *in_req = fastboot_func->in_req;
353 int ret;
354
355 memcpy(in_req->buf, buffer, buffer_size);
356 in_req->length = buffer_size;
357
358 usb_ep_dequeue(fastboot_func->in_ep, in_req);
359
360 ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0);
361 if (ret)
362 printf("Error %d on queue\n", ret);
363 return 0;
364}
365
366static int fastboot_tx_write_str(const char *buffer)
367{
368 return fastboot_tx_write(buffer, strlen(buffer));
369}
370
371static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
372{
373 do_reset(NULL, 0, 0, NULL);
374}
375
376int __weak fb_set_reboot_flag(void)
377{
378 return -ENOSYS;
379}
380
381static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
382{
383 char *cmd = req->buf;
384 if (!strcmp_l1("reboot-bootloader", cmd)) {
385 if (fb_set_reboot_flag()) {
386 fastboot_tx_write_str("FAILCannot set reboot flag");
387 return;
388 }
389 }
390 fastboot_func->in_req->complete = compl_do_reset;
391 fastboot_tx_write_str("OKAY");
392}
393
394static int strcmp_l1(const char *s1, const char *s2)
395{
396 if (!s1 || !s2)
397 return -1;
398 return strncmp(s1, s2, strlen(s1));
399}
400
401static void cb_getvar(struct usb_ep *ep, struct usb_request *req)
402{
403 char *cmd = req->buf;
404 char response[FASTBOOT_RESPONSE_LEN];
405 const char *s;
406 size_t chars_left;
407
408 strcpy(response, "OKAY");
409 chars_left = sizeof(response) - strlen(response) - 1;
410
411 strsep(&cmd, ":");
412 if (!cmd) {
413 error("missing variable");
414 fastboot_tx_write_str("FAILmissing var");
415 return;
416 }
417
418 if (!strcmp_l1("version", cmd)) {
419 strncat(response, FASTBOOT_VERSION, chars_left);
420 } else if (!strcmp_l1("bootloader-version", cmd)) {
421 strncat(response, U_BOOT_VERSION, chars_left);
422 } else if (!strcmp_l1("downloadsize", cmd) ||
423 !strcmp_l1("max-download-size", cmd)) {
424 char str_num[12];
425
426 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE);
427 strncat(response, str_num, chars_left);
428 } else if (!strcmp_l1("serialno", cmd)) {
429 s = getenv("serial#");
430 if (s)
431 strncat(response, s, chars_left);
432 else
433 strcpy(response, "FAILValue not set");
434 } else {
435 char envstr[32];
436
437 snprintf(envstr, sizeof(envstr) - 1, "fastboot.%s", cmd);
438 s = getenv(envstr);
439 if (s) {
440 strncat(response, s, chars_left);
441 } else {
442 printf("WARNING: unknown variable: %s\n", cmd);
443 strcpy(response, "FAILVariable not implemented");
444 }
445 }
446 fastboot_tx_write_str(response);
447}
448
449static unsigned int rx_bytes_expected(struct usb_ep *ep)
450{
451 int rx_remain = download_size - download_bytes;
452 unsigned int rem;
453 unsigned int maxpacket = ep->maxpacket;
454
455 if (rx_remain <= 0)
456 return 0;
457 else if (rx_remain > EP_BUFFER_SIZE)
458 return EP_BUFFER_SIZE;
459
460
461
462
463
464
465
466 rem = rx_remain % maxpacket;
467 if (rem > 0)
468 rx_remain = rx_remain + (maxpacket - rem);
469
470 return rx_remain;
471}
472
473#define BYTES_PER_DOT 0x20000
474static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
475{
476 char response[FASTBOOT_RESPONSE_LEN];
477 unsigned int transfer_size = download_size - download_bytes;
478 const unsigned char *buffer = req->buf;
479 unsigned int buffer_size = req->actual;
480 unsigned int pre_dot_num, now_dot_num;
481
482 if (req->status != 0) {
483 printf("Bad status: %d\n", req->status);
484 return;
485 }
486
487 if (buffer_size < transfer_size)
488 transfer_size = buffer_size;
489
490 memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes,
491 buffer, transfer_size);
492
493 pre_dot_num = download_bytes / BYTES_PER_DOT;
494 download_bytes += transfer_size;
495 now_dot_num = download_bytes / BYTES_PER_DOT;
496
497 if (pre_dot_num != now_dot_num) {
498 putc('.');
499 if (!(now_dot_num % 74))
500 putc('\n');
501 }
502
503
504 if (download_bytes >= download_size) {
505
506
507
508
509 download_size = 0;
510 req->complete = rx_handler_command;
511 req->length = EP_BUFFER_SIZE;
512
513 strcpy(response, "OKAY");
514 fastboot_tx_write_str(response);
515
516 printf("\ndownloading of %d bytes finished\n", download_bytes);
517 } else {
518 req->length = rx_bytes_expected(ep);
519 }
520
521 req->actual = 0;
522 usb_ep_queue(ep, req, 0);
523}
524
525static void cb_download(struct usb_ep *ep, struct usb_request *req)
526{
527 char *cmd = req->buf;
528 char response[FASTBOOT_RESPONSE_LEN];
529
530 strsep(&cmd, ":");
531 download_size = simple_strtoul(cmd, NULL, 16);
532 download_bytes = 0;
533
534 printf("Starting download of %d bytes\n", download_size);
535
536 if (0 == download_size) {
537 strcpy(response, "FAILdata invalid size");
538 } else if (download_size > CONFIG_FASTBOOT_BUF_SIZE) {
539 download_size = 0;
540 strcpy(response, "FAILdata too large");
541 } else {
542 sprintf(response, "DATA%08x", download_size);
543 req->complete = rx_handler_dl_image;
544 req->length = rx_bytes_expected(ep);
545 }
546 fastboot_tx_write_str(response);
547}
548
549static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req)
550{
551 char boot_addr_start[12];
552 char *bootm_args[] = { "bootm", boot_addr_start, NULL };
553
554 puts("Booting kernel..\n");
555
556 sprintf(boot_addr_start, "0x%lx", load_addr);
557 do_bootm(NULL, 0, 2, bootm_args);
558
559
560 do_reset(NULL, 0, 0, NULL);
561}
562
563static void cb_boot(struct usb_ep *ep, struct usb_request *req)
564{
565 fastboot_func->in_req->complete = do_bootm_on_complete;
566 fastboot_tx_write_str("OKAY");
567}
568
569static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req)
570{
571 g_dnl_trigger_detach();
572}
573
574static void cb_continue(struct usb_ep *ep, struct usb_request *req)
575{
576 fastboot_func->in_req->complete = do_exit_on_complete;
577 fastboot_tx_write_str("OKAY");
578}
579
580#ifdef CONFIG_FASTBOOT_FLASH
581static void cb_flash(struct usb_ep *ep, struct usb_request *req)
582{
583 char *cmd = req->buf;
584 char response[FASTBOOT_RESPONSE_LEN];
585
586 strsep(&cmd, ":");
587 if (!cmd) {
588 error("missing partition name");
589 fastboot_tx_write_str("FAILmissing partition name");
590 return;
591 }
592
593
594 fb_response_str = response;
595
596 fastboot_fail("no flash device defined");
597#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
598 fb_mmc_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR,
599 download_bytes);
600#endif
601#ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
602 fb_nand_flash_write(cmd,
603 (void *)CONFIG_FASTBOOT_BUF_ADDR,
604 download_bytes);
605#endif
606 fastboot_tx_write_str(response);
607}
608#endif
609
610static void cb_oem(struct usb_ep *ep, struct usb_request *req)
611{
612 char *cmd = req->buf;
613#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
614 if (strncmp("format", cmd + 4, 6) == 0) {
615 char cmdbuf[32];
616 sprintf(cmdbuf, "gpt write mmc %x $partitions",
617 CONFIG_FASTBOOT_FLASH_MMC_DEV);
618 if (run_command(cmdbuf, 0))
619 fastboot_tx_write_str("FAIL");
620 else
621 fastboot_tx_write_str("OKAY");
622 } else
623#endif
624 if (strncmp("unlock", cmd + 4, 8) == 0) {
625 fastboot_tx_write_str("FAILnot implemented");
626 }
627 else {
628 fastboot_tx_write_str("FAILunknown oem command");
629 }
630}
631
632#ifdef CONFIG_FASTBOOT_FLASH
633static void cb_erase(struct usb_ep *ep, struct usb_request *req)
634{
635 char *cmd = req->buf;
636 char response[FASTBOOT_RESPONSE_LEN];
637
638 strsep(&cmd, ":");
639 if (!cmd) {
640 error("missing partition name");
641 fastboot_tx_write_str("FAILmissing partition name");
642 return;
643 }
644
645
646 fb_response_str = response;
647
648 fastboot_fail("no flash device defined");
649#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
650 fb_mmc_erase(cmd);
651#endif
652#ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
653 fb_nand_erase(cmd);
654#endif
655 fastboot_tx_write_str(response);
656}
657#endif
658
659struct cmd_dispatch_info {
660 char *cmd;
661 void (*cb)(struct usb_ep *ep, struct usb_request *req);
662};
663
664static const struct cmd_dispatch_info cmd_dispatch_info[] = {
665 {
666 .cmd = "reboot",
667 .cb = cb_reboot,
668 }, {
669 .cmd = "getvar:",
670 .cb = cb_getvar,
671 }, {
672 .cmd = "download:",
673 .cb = cb_download,
674 }, {
675 .cmd = "boot",
676 .cb = cb_boot,
677 }, {
678 .cmd = "continue",
679 .cb = cb_continue,
680 },
681#ifdef CONFIG_FASTBOOT_FLASH
682 {
683 .cmd = "flash",
684 .cb = cb_flash,
685 }, {
686 .cmd = "erase",
687 .cb = cb_erase,
688 },
689#endif
690 {
691 .cmd = "oem",
692 .cb = cb_oem,
693 },
694};
695
696static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
697{
698 char *cmdbuf = req->buf;
699 void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL;
700 int i;
701
702 if (req->status != 0 || req->length == 0)
703 return;
704
705 for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) {
706 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) {
707 func_cb = cmd_dispatch_info[i].cb;
708 break;
709 }
710 }
711
712 if (!func_cb) {
713 error("unknown command: %s", cmdbuf);
714 fastboot_tx_write_str("FAILunknown command");
715 } else {
716 if (req->actual < req->length) {
717 u8 *buf = (u8 *)req->buf;
718 buf[req->actual] = 0;
719 func_cb(ep, req);
720 } else {
721 error("buffer overflow");
722 fastboot_tx_write_str("FAILbuffer overflow");
723 }
724 }
725
726 *cmdbuf = '\0';
727 req->actual = 0;
728 usb_ep_queue(ep, req, 0);
729}
730
