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Lukasz Majewskib819ddb2012-08-06 14:41:06 +02001/*
2 * f_dfu.c -- Device Firmware Update USB function
3 *
4 * Copyright (C) 2012 Samsung Electronics
5 * authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
6 * Lukasz Majewski <l.majewski@samsung.com>
7 *
Ɓukasz Majewski81c065d2013-07-05 11:40:47 +02008 * Based on OpenMoko u-boot: drivers/usb/usbdfu.c
9 * (C) 2007 by OpenMoko, Inc.
10 * Author: Harald Welte <laforge@openmoko.org>
11 *
12 * based on existing SAM7DFU code from OpenPCD:
13 * (C) Copyright 2006 by Harald Welte <hwelte at hmw-consulting.de>
14 *
Wolfgang Denk1a459662013-07-08 09:37:19 +020015 * SPDX-License-Identifier: GPL-2.0+
Lukasz Majewskib819ddb2012-08-06 14:41:06 +020016 */
17
18#include <errno.h>
19#include <common.h>
20#include <malloc.h>
21
22#include <linux/usb/ch9.h>
Lukasz Majewskib819ddb2012-08-06 14:41:06 +020023#include <linux/usb/gadget.h>
24#include <linux/usb/composite.h>
25
26#include <dfu.h>
Mateusz Zalegac4d0e852014-04-28 21:13:28 +020027#include <g_dnl.h>
Lukasz Majewskib819ddb2012-08-06 14:41:06 +020028#include "f_dfu.h"
29
30struct f_dfu {
31 struct usb_function usb_function;
32
33 struct usb_descriptor_header **function;
34 struct usb_string *strings;
35
36 /* when configured, we have one config */
37 u8 config;
38 u8 altsetting;
39 enum dfu_state dfu_state;
40 unsigned int dfu_status;
41
42 /* Send/received block number is handy for data integrity check */
43 int blk_seq_num;
Lukasz Majewski33fac4a2013-12-09 16:20:14 +010044 unsigned int poll_timeout;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +020045};
46
Lukasz Majewskifc18f8d2016-01-28 16:14:49 +010047struct dfu_entity *dfu_defer_flush;
48
Lukasz Majewskib819ddb2012-08-06 14:41:06 +020049typedef int (*dfu_state_fn) (struct f_dfu *,
50 const struct usb_ctrlrequest *,
51 struct usb_gadget *,
52 struct usb_request *);
53
54static inline struct f_dfu *func_to_dfu(struct usb_function *f)
55{
56 return container_of(f, struct f_dfu, usb_function);
57}
58
59static const struct dfu_function_descriptor dfu_func = {
60 .bLength = sizeof dfu_func,
61 .bDescriptorType = DFU_DT_FUNC,
62 .bmAttributes = DFU_BIT_WILL_DETACH |
63 DFU_BIT_MANIFESTATION_TOLERANT |
64 DFU_BIT_CAN_UPLOAD |
65 DFU_BIT_CAN_DNLOAD,
66 .wDetachTimeOut = 0,
67 .wTransferSize = DFU_USB_BUFSIZ,
68 .bcdDFUVersion = __constant_cpu_to_le16(0x0110),
69};
70
71static struct usb_interface_descriptor dfu_intf_runtime = {
72 .bLength = sizeof dfu_intf_runtime,
73 .bDescriptorType = USB_DT_INTERFACE,
74 .bNumEndpoints = 0,
75 .bInterfaceClass = USB_CLASS_APP_SPEC,
76 .bInterfaceSubClass = 1,
77 .bInterfaceProtocol = 1,
78 /* .iInterface = DYNAMIC */
79};
80
81static struct usb_descriptor_header *dfu_runtime_descs[] = {
82 (struct usb_descriptor_header *) &dfu_intf_runtime,
83 NULL,
84};
85
Lukasz Majewskib819ddb2012-08-06 14:41:06 +020086static const char dfu_name[] = "Device Firmware Upgrade";
87
88/*
89 * static strings, in UTF-8
90 *
91 * dfu_generic configuration
92 */
93static struct usb_string strings_dfu_generic[] = {
94 [0].s = dfu_name,
95 { } /* end of list */
96};
97
98static struct usb_gadget_strings stringtab_dfu_generic = {
99 .language = 0x0409, /* en-us */
100 .strings = strings_dfu_generic,
101};
102
103static struct usb_gadget_strings *dfu_generic_strings[] = {
104 &stringtab_dfu_generic,
105 NULL,
106};
107
108/*
109 * usb_function specific
110 */
111static struct usb_gadget_strings stringtab_dfu = {
112 .language = 0x0409, /* en-us */
113 /*
114 * .strings
115 *
116 * assigned during initialization,
117 * depends on number of flash entities
118 *
119 */
120};
121
122static struct usb_gadget_strings *dfu_strings[] = {
123 &stringtab_dfu,
124 NULL,
125};
126
Lukasz Majewski33fac4a2013-12-09 16:20:14 +0100127static void dfu_set_poll_timeout(struct dfu_status *dstat, unsigned int ms)
128{
129 /*
130 * The bwPollTimeout DFU_GETSTATUS request payload provides information
131 * about minimum time, in milliseconds, that the host should wait before
132 * sending a subsequent DFU_GETSTATUS request
133 *
134 * This permits the device to vary the delay depending on its need to
135 * erase or program the memory
136 *
137 */
138
139 unsigned char *p = (unsigned char *)&ms;
140
141 if (!ms || (ms & ~DFU_POLL_TIMEOUT_MASK)) {
142 dstat->bwPollTimeout[0] = 0;
143 dstat->bwPollTimeout[1] = 0;
144 dstat->bwPollTimeout[2] = 0;
145
146 return;
147 }
148
149 dstat->bwPollTimeout[0] = *p++;
150 dstat->bwPollTimeout[1] = *p++;
151 dstat->bwPollTimeout[2] = *p;
152}
153
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200154/*-------------------------------------------------------------------------*/
155
156static void dnload_request_complete(struct usb_ep *ep, struct usb_request *req)
157{
158 struct f_dfu *f_dfu = req->context;
Stephen Warren3ee95932014-06-11 12:48:08 -0600159 int ret;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200160
Stephen Warren3ee95932014-06-11 12:48:08 -0600161 ret = dfu_write(dfu_get_entity(f_dfu->altsetting), req->buf,
Felipe Balbi00e9d692017-02-10 19:32:31 +0300162 req->actual, f_dfu->blk_seq_num);
Stephen Warren3ee95932014-06-11 12:48:08 -0600163 if (ret) {
164 f_dfu->dfu_status = DFU_STATUS_errUNKNOWN;
165 f_dfu->dfu_state = DFU_STATE_dfuERROR;
166 }
Heiko Schocher001a8312014-03-18 08:09:56 +0100167}
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200168
Heiko Schocher001a8312014-03-18 08:09:56 +0100169static void dnload_request_flush(struct usb_ep *ep, struct usb_request *req)
170{
171 struct f_dfu *f_dfu = req->context;
Lukasz Majewskifc18f8d2016-01-28 16:14:49 +0100172 dfu_set_defer_flush(dfu_get_entity(f_dfu->altsetting));
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200173}
174
Heiko Schocherfc25fa22014-04-11 07:59:47 +0200175static inline int dfu_get_manifest_timeout(struct dfu_entity *dfu)
176{
177 return dfu->poll_timeout ? dfu->poll_timeout(dfu) :
178 DFU_MANIFEST_POLL_TIMEOUT;
179}
180
Patrick Delaunayd4287762016-12-16 18:41:32 +0100181static int handle_getstatus(struct usb_request *req)
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200182{
183 struct dfu_status *dstat = (struct dfu_status *)req->buf;
184 struct f_dfu *f_dfu = req->context;
Heiko Schocherfc25fa22014-04-11 07:59:47 +0200185 struct dfu_entity *dfu = dfu_get_entity(f_dfu->altsetting);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200186
Heiko Schocher001a8312014-03-18 08:09:56 +0100187 dfu_set_poll_timeout(dstat, 0);
188
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200189 switch (f_dfu->dfu_state) {
190 case DFU_STATE_dfuDNLOAD_SYNC:
191 case DFU_STATE_dfuDNBUSY:
192 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_IDLE;
193 break;
194 case DFU_STATE_dfuMANIFEST_SYNC:
Heiko Schocher001a8312014-03-18 08:09:56 +0100195 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200196 break;
Heiko Schocher001a8312014-03-18 08:09:56 +0100197 case DFU_STATE_dfuMANIFEST:
Heiko Schocherfc25fa22014-04-11 07:59:47 +0200198 dfu_set_poll_timeout(dstat, dfu_get_manifest_timeout(dfu));
199 break;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200200 default:
201 break;
202 }
203
Lukasz Majewski33fac4a2013-12-09 16:20:14 +0100204 if (f_dfu->poll_timeout)
205 if (!(f_dfu->blk_seq_num %
206 (dfu_get_buf_size() / DFU_USB_BUFSIZ)))
207 dfu_set_poll_timeout(dstat, f_dfu->poll_timeout);
208
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200209 /* send status response */
210 dstat->bStatus = f_dfu->dfu_status;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200211 dstat->bState = f_dfu->dfu_state;
212 dstat->iString = 0;
Patrick Delaunayd4287762016-12-16 18:41:32 +0100213
214 return sizeof(struct dfu_status);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200215}
216
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100217static int handle_getstate(struct usb_request *req)
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200218{
219 struct f_dfu *f_dfu = req->context;
220
221 ((u8 *)req->buf)[0] = f_dfu->dfu_state;
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100222 return sizeof(u8);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200223}
224
225static inline void to_dfu_mode(struct f_dfu *f_dfu)
226{
227 f_dfu->usb_function.strings = dfu_strings;
228 f_dfu->usb_function.hs_descriptors = f_dfu->function;
Heiko Schocher9f3b8ed2014-09-10 08:55:00 +0200229 f_dfu->usb_function.descriptors = f_dfu->function;
Heiko Schocherad5f9772013-06-25 13:59:29 +0200230 f_dfu->dfu_state = DFU_STATE_dfuIDLE;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200231}
232
233static inline void to_runtime_mode(struct f_dfu *f_dfu)
234{
235 f_dfu->usb_function.strings = NULL;
236 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs;
Heiko Schocher9f3b8ed2014-09-10 08:55:00 +0200237 f_dfu->usb_function.descriptors = dfu_runtime_descs;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200238}
239
240static int handle_upload(struct usb_request *req, u16 len)
241{
242 struct f_dfu *f_dfu = req->context;
243
244 return dfu_read(dfu_get_entity(f_dfu->altsetting), req->buf,
245 req->length, f_dfu->blk_seq_num);
246}
247
248static int handle_dnload(struct usb_gadget *gadget, u16 len)
249{
250 struct usb_composite_dev *cdev = get_gadget_data(gadget);
251 struct usb_request *req = cdev->req;
252 struct f_dfu *f_dfu = req->context;
253
254 if (len == 0)
255 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST_SYNC;
256
257 req->complete = dnload_request_complete;
258
259 return len;
260}
261
262/*-------------------------------------------------------------------------*/
263/* DFU state machine */
264static int state_app_idle(struct f_dfu *f_dfu,
265 const struct usb_ctrlrequest *ctrl,
266 struct usb_gadget *gadget,
267 struct usb_request *req)
268{
269 int value = 0;
270
271 switch (ctrl->bRequest) {
272 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100273 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200274 break;
275 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100276 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200277 break;
278 case USB_REQ_DFU_DETACH:
279 f_dfu->dfu_state = DFU_STATE_appDETACH;
280 to_dfu_mode(f_dfu);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200281 value = RET_ZLP;
282 break;
283 default:
284 value = RET_STALL;
285 break;
286 }
287
288 return value;
289}
290
291static int state_app_detach(struct f_dfu *f_dfu,
292 const struct usb_ctrlrequest *ctrl,
293 struct usb_gadget *gadget,
294 struct usb_request *req)
295{
296 int value = 0;
297
298 switch (ctrl->bRequest) {
299 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100300 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200301 break;
302 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100303 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200304 break;
305 default:
306 f_dfu->dfu_state = DFU_STATE_appIDLE;
307 value = RET_STALL;
308 break;
309 }
310
311 return value;
312}
313
314static int state_dfu_idle(struct f_dfu *f_dfu,
315 const struct usb_ctrlrequest *ctrl,
316 struct usb_gadget *gadget,
317 struct usb_request *req)
318{
319 u16 w_value = le16_to_cpu(ctrl->wValue);
320 u16 len = le16_to_cpu(ctrl->wLength);
321 int value = 0;
322
323 switch (ctrl->bRequest) {
324 case USB_REQ_DFU_DNLOAD:
325 if (len == 0) {
326 f_dfu->dfu_state = DFU_STATE_dfuERROR;
327 value = RET_STALL;
328 break;
329 }
330 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC;
331 f_dfu->blk_seq_num = w_value;
332 value = handle_dnload(gadget, len);
333 break;
334 case USB_REQ_DFU_UPLOAD:
335 f_dfu->dfu_state = DFU_STATE_dfuUPLOAD_IDLE;
336 f_dfu->blk_seq_num = 0;
337 value = handle_upload(req, len);
338 break;
339 case USB_REQ_DFU_ABORT:
340 /* no zlp? */
341 value = RET_ZLP;
342 break;
343 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100344 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200345 break;
346 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100347 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200348 break;
349 case USB_REQ_DFU_DETACH:
350 /*
351 * Proprietary extension: 'detach' from idle mode and
352 * get back to runtime mode in case of USB Reset. As
353 * much as I dislike this, we just can't use every USB
354 * bus reset to switch back to runtime mode, since at
355 * least the Linux USB stack likes to send a number of
356 * resets in a row :(
357 */
358 f_dfu->dfu_state =
359 DFU_STATE_dfuMANIFEST_WAIT_RST;
360 to_runtime_mode(f_dfu);
361 f_dfu->dfu_state = DFU_STATE_appIDLE;
Lukasz Majewski6bed7ce2013-07-18 13:19:14 +0200362
Rob Herringfe1b28c2014-12-10 14:43:03 -0600363 g_dnl_trigger_detach();
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200364 break;
365 default:
366 f_dfu->dfu_state = DFU_STATE_dfuERROR;
367 value = RET_STALL;
368 break;
369 }
370
371 return value;
372}
373
374static int state_dfu_dnload_sync(struct f_dfu *f_dfu,
375 const struct usb_ctrlrequest *ctrl,
376 struct usb_gadget *gadget,
377 struct usb_request *req)
378{
379 int value = 0;
380
381 switch (ctrl->bRequest) {
382 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100383 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200384 break;
385 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100386 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200387 break;
388 default:
389 f_dfu->dfu_state = DFU_STATE_dfuERROR;
390 value = RET_STALL;
391 break;
392 }
393
394 return value;
395}
396
397static int state_dfu_dnbusy(struct f_dfu *f_dfu,
398 const struct usb_ctrlrequest *ctrl,
399 struct usb_gadget *gadget,
400 struct usb_request *req)
401{
402 int value = 0;
403
404 switch (ctrl->bRequest) {
405 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100406 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200407 break;
408 default:
409 f_dfu->dfu_state = DFU_STATE_dfuERROR;
410 value = RET_STALL;
411 break;
412 }
413
414 return value;
415}
416
417static int state_dfu_dnload_idle(struct f_dfu *f_dfu,
418 const struct usb_ctrlrequest *ctrl,
419 struct usb_gadget *gadget,
420 struct usb_request *req)
421{
422 u16 w_value = le16_to_cpu(ctrl->wValue);
423 u16 len = le16_to_cpu(ctrl->wLength);
424 int value = 0;
425
426 switch (ctrl->bRequest) {
427 case USB_REQ_DFU_DNLOAD:
428 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC;
429 f_dfu->blk_seq_num = w_value;
430 value = handle_dnload(gadget, len);
431 break;
432 case USB_REQ_DFU_ABORT:
433 f_dfu->dfu_state = DFU_STATE_dfuIDLE;
434 value = RET_ZLP;
435 break;
436 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100437 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200438 break;
439 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100440 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200441 break;
442 default:
443 f_dfu->dfu_state = DFU_STATE_dfuERROR;
444 value = RET_STALL;
445 break;
446 }
447
448 return value;
449}
450
451static int state_dfu_manifest_sync(struct f_dfu *f_dfu,
452 const struct usb_ctrlrequest *ctrl,
453 struct usb_gadget *gadget,
454 struct usb_request *req)
455{
456 int value = 0;
457
458 switch (ctrl->bRequest) {
459 case USB_REQ_DFU_GETSTATUS:
460 /* We're MainfestationTolerant */
Heiko Schocher001a8312014-03-18 08:09:56 +0100461 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST;
Patrick Delaunayd4287762016-12-16 18:41:32 +0100462 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200463 f_dfu->blk_seq_num = 0;
Heiko Schocher001a8312014-03-18 08:09:56 +0100464 req->complete = dnload_request_flush;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200465 break;
466 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100467 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200468 break;
469 default:
470 f_dfu->dfu_state = DFU_STATE_dfuERROR;
471 value = RET_STALL;
472 break;
473 }
474
475 return value;
476}
477
Heiko Schocher001a8312014-03-18 08:09:56 +0100478static int state_dfu_manifest(struct f_dfu *f_dfu,
479 const struct usb_ctrlrequest *ctrl,
480 struct usb_gadget *gadget,
481 struct usb_request *req)
482{
483 int value = 0;
484
485 switch (ctrl->bRequest) {
486 case USB_REQ_DFU_GETSTATUS:
487 /* We're MainfestationTolerant */
488 f_dfu->dfu_state = DFU_STATE_dfuIDLE;
Patrick Delaunayd4287762016-12-16 18:41:32 +0100489 value = handle_getstatus(req);
Heiko Schocher001a8312014-03-18 08:09:56 +0100490 f_dfu->blk_seq_num = 0;
Heiko Schocher001a8312014-03-18 08:09:56 +0100491 puts("DOWNLOAD ... OK\nCtrl+C to exit ...\n");
492 break;
493 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100494 value = handle_getstate(req);
Heiko Schocher001a8312014-03-18 08:09:56 +0100495 break;
496 default:
497 f_dfu->dfu_state = DFU_STATE_dfuERROR;
498 value = RET_STALL;
499 break;
500 }
501 return value;
502}
503
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200504static int state_dfu_upload_idle(struct f_dfu *f_dfu,
505 const struct usb_ctrlrequest *ctrl,
506 struct usb_gadget *gadget,
507 struct usb_request *req)
508{
509 u16 w_value = le16_to_cpu(ctrl->wValue);
510 u16 len = le16_to_cpu(ctrl->wLength);
511 int value = 0;
512
513 switch (ctrl->bRequest) {
514 case USB_REQ_DFU_UPLOAD:
515 /* state transition if less data then requested */
516 f_dfu->blk_seq_num = w_value;
517 value = handle_upload(req, len);
518 if (value >= 0 && value < len)
519 f_dfu->dfu_state = DFU_STATE_dfuIDLE;
520 break;
521 case USB_REQ_DFU_ABORT:
522 f_dfu->dfu_state = DFU_STATE_dfuIDLE;
523 /* no zlp? */
524 value = RET_ZLP;
525 break;
526 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100527 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200528 break;
529 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100530 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200531 break;
532 default:
533 f_dfu->dfu_state = DFU_STATE_dfuERROR;
534 value = RET_STALL;
535 break;
536 }
537
538 return value;
539}
540
541static int state_dfu_error(struct f_dfu *f_dfu,
542 const struct usb_ctrlrequest *ctrl,
543 struct usb_gadget *gadget,
544 struct usb_request *req)
545{
546 int value = 0;
547
548 switch (ctrl->bRequest) {
549 case USB_REQ_DFU_GETSTATUS:
Patrick Delaunayd4287762016-12-16 18:41:32 +0100550 value = handle_getstatus(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200551 break;
552 case USB_REQ_DFU_GETSTATE:
Patrick Delaunayf11bb252016-12-16 18:41:31 +0100553 value = handle_getstate(req);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200554 break;
555 case USB_REQ_DFU_CLRSTATUS:
556 f_dfu->dfu_state = DFU_STATE_dfuIDLE;
557 f_dfu->dfu_status = DFU_STATUS_OK;
558 /* no zlp? */
559 value = RET_ZLP;
560 break;
561 default:
562 f_dfu->dfu_state = DFU_STATE_dfuERROR;
563 value = RET_STALL;
564 break;
565 }
566
567 return value;
568}
569
570static dfu_state_fn dfu_state[] = {
571 state_app_idle, /* DFU_STATE_appIDLE */
572 state_app_detach, /* DFU_STATE_appDETACH */
573 state_dfu_idle, /* DFU_STATE_dfuIDLE */
574 state_dfu_dnload_sync, /* DFU_STATE_dfuDNLOAD_SYNC */
575 state_dfu_dnbusy, /* DFU_STATE_dfuDNBUSY */
576 state_dfu_dnload_idle, /* DFU_STATE_dfuDNLOAD_IDLE */
577 state_dfu_manifest_sync, /* DFU_STATE_dfuMANIFEST_SYNC */
Heiko Schocher001a8312014-03-18 08:09:56 +0100578 state_dfu_manifest, /* DFU_STATE_dfuMANIFEST */
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200579 NULL, /* DFU_STATE_dfuMANIFEST_WAIT_RST */
580 state_dfu_upload_idle, /* DFU_STATE_dfuUPLOAD_IDLE */
581 state_dfu_error /* DFU_STATE_dfuERROR */
582};
583
584static int
585dfu_handle(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
586{
587 struct usb_gadget *gadget = f->config->cdev->gadget;
588 struct usb_request *req = f->config->cdev->req;
589 struct f_dfu *f_dfu = f->config->cdev->req->context;
590 u16 len = le16_to_cpu(ctrl->wLength);
591 u16 w_value = le16_to_cpu(ctrl->wValue);
592 int value = 0;
593 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK;
594
595 debug("w_value: 0x%x len: 0x%x\n", w_value, len);
596 debug("req_type: 0x%x ctrl->bRequest: 0x%x f_dfu->dfu_state: 0x%x\n",
597 req_type, ctrl->bRequest, f_dfu->dfu_state);
598
599 if (req_type == USB_TYPE_STANDARD) {
600 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR &&
601 (w_value >> 8) == DFU_DT_FUNC) {
602 value = min(len, (u16) sizeof(dfu_func));
603 memcpy(req->buf, &dfu_func, value);
604 }
605 } else /* DFU specific request */
606 value = dfu_state[f_dfu->dfu_state] (f_dfu, ctrl, gadget, req);
607
608 if (value >= 0) {
609 req->length = value;
610 req->zero = value < len;
611 value = usb_ep_queue(gadget->ep0, req, 0);
612 if (value < 0) {
613 debug("ep_queue --> %d\n", value);
614 req->status = 0;
615 }
616 }
617
618 return value;
619}
620
621/*-------------------------------------------------------------------------*/
622
623static int
624dfu_prepare_strings(struct f_dfu *f_dfu, int n)
625{
626 struct dfu_entity *de = NULL;
627 int i = 0;
628
629 f_dfu->strings = calloc(sizeof(struct usb_string), n + 1);
630 if (!f_dfu->strings)
Peng Fan12ff19d2016-05-03 10:25:22 +0800631 return -ENOMEM;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200632
633 for (i = 0; i < n; ++i) {
634 de = dfu_get_entity(i);
635 f_dfu->strings[i].s = de->name;
636 }
637
638 f_dfu->strings[i].id = 0;
639 f_dfu->strings[i].s = NULL;
640
641 return 0;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200642}
643
644static int dfu_prepare_function(struct f_dfu *f_dfu, int n)
645{
646 struct usb_interface_descriptor *d;
647 int i = 0;
648
Patrick Delaunay89870122016-12-08 18:10:49 +0100649 f_dfu->function = calloc(sizeof(struct usb_descriptor_header *), n + 2);
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200650 if (!f_dfu->function)
651 goto enomem;
652
653 for (i = 0; i < n; ++i) {
654 d = calloc(sizeof(*d), 1);
655 if (!d)
656 goto enomem;
657
658 d->bLength = sizeof(*d);
659 d->bDescriptorType = USB_DT_INTERFACE;
660 d->bAlternateSetting = i;
661 d->bNumEndpoints = 0;
662 d->bInterfaceClass = USB_CLASS_APP_SPEC;
663 d->bInterfaceSubClass = 1;
664 d->bInterfaceProtocol = 2;
665
666 f_dfu->function[i] = (struct usb_descriptor_header *)d;
667 }
Patrick Delaunay89870122016-12-08 18:10:49 +0100668
669 /* add DFU Functional Descriptor */
670 f_dfu->function[i] = calloc(sizeof(dfu_func), 1);
671 if (!f_dfu->function[i])
672 goto enomem;
673 memcpy(f_dfu->function[i], &dfu_func, sizeof(dfu_func));
674
675 i++;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200676 f_dfu->function[i] = NULL;
677
678 return 0;
679
680enomem:
681 while (i) {
682 free(f_dfu->function[--i]);
683 f_dfu->function[i] = NULL;
684 }
685 free(f_dfu->function);
686
687 return -ENOMEM;
688}
689
690static int dfu_bind(struct usb_configuration *c, struct usb_function *f)
691{
692 struct usb_composite_dev *cdev = c->cdev;
693 struct f_dfu *f_dfu = func_to_dfu(f);
Felipe Balbi9bf9e8132017-02-22 11:22:38 +0200694 const char *s;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200695 int alt_num = dfu_get_alt_number();
696 int rv, id, i;
697
698 id = usb_interface_id(c, f);
699 if (id < 0)
700 return id;
701 dfu_intf_runtime.bInterfaceNumber = id;
702
703 f_dfu->dfu_state = DFU_STATE_appIDLE;
704 f_dfu->dfu_status = DFU_STATUS_OK;
705
706 rv = dfu_prepare_function(f_dfu, alt_num);
707 if (rv)
708 goto error;
709
710 rv = dfu_prepare_strings(f_dfu, alt_num);
711 if (rv)
712 goto error;
713 for (i = 0; i < alt_num; i++) {
714 id = usb_string_id(cdev);
715 if (id < 0)
716 return id;
717 f_dfu->strings[i].id = id;
718 ((struct usb_interface_descriptor *)f_dfu->function[i])
719 ->iInterface = id;
720 }
721
Heiko Schocherad5f9772013-06-25 13:59:29 +0200722 to_dfu_mode(f_dfu);
723
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200724 stringtab_dfu.strings = f_dfu->strings;
725
726 cdev->req->context = f_dfu;
727
Felipe Balbi9bf9e8132017-02-22 11:22:38 +0200728 s = getenv("serial#");
729 if (s)
730 g_dnl_set_serialnumber((char *)s);
731
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200732error:
733 return rv;
734}
735
736static void dfu_unbind(struct usb_configuration *c, struct usb_function *f)
737{
738 struct f_dfu *f_dfu = func_to_dfu(f);
739 int alt_num = dfu_get_alt_number();
740 int i;
741
742 if (f_dfu->strings) {
743 i = alt_num;
744 while (i)
745 f_dfu->strings[--i].s = NULL;
746
747 free(f_dfu->strings);
748 }
749
750 if (f_dfu->function) {
751 i = alt_num;
752 while (i) {
753 free(f_dfu->function[--i]);
754 f_dfu->function[i] = NULL;
755 }
756 free(f_dfu->function);
757 }
758
759 free(f_dfu);
760}
761
762static int dfu_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
763{
764 struct f_dfu *f_dfu = func_to_dfu(f);
765
766 debug("%s: intf:%d alt:%d\n", __func__, intf, alt);
767
768 f_dfu->altsetting = alt;
Stephen Warren3ee95932014-06-11 12:48:08 -0600769 f_dfu->dfu_state = DFU_STATE_dfuIDLE;
770 f_dfu->dfu_status = DFU_STATUS_OK;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200771
772 return 0;
773}
774
Stefan Roese1fd81b72015-01-09 14:54:56 +0100775static int __dfu_get_alt(struct usb_function *f, unsigned intf)
776{
777 struct f_dfu *f_dfu = func_to_dfu(f);
778
779 return f_dfu->altsetting;
780}
781
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200782/* TODO: is this really what we need here? */
783static void dfu_disable(struct usb_function *f)
784{
785 struct f_dfu *f_dfu = func_to_dfu(f);
786 if (f_dfu->config == 0)
787 return;
788
789 debug("%s: reset config\n", __func__);
790
791 f_dfu->config = 0;
792}
793
794static int dfu_bind_config(struct usb_configuration *c)
795{
796 struct f_dfu *f_dfu;
797 int status;
798
799 f_dfu = calloc(sizeof(*f_dfu), 1);
800 if (!f_dfu)
801 return -ENOMEM;
802 f_dfu->usb_function.name = "dfu";
803 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs;
Heiko Schocher9f3b8ed2014-09-10 08:55:00 +0200804 f_dfu->usb_function.descriptors = dfu_runtime_descs;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200805 f_dfu->usb_function.bind = dfu_bind;
806 f_dfu->usb_function.unbind = dfu_unbind;
807 f_dfu->usb_function.set_alt = dfu_set_alt;
Stefan Roese1fd81b72015-01-09 14:54:56 +0100808 f_dfu->usb_function.get_alt = __dfu_get_alt;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200809 f_dfu->usb_function.disable = dfu_disable;
Lukasz Majewski77b95042013-12-09 16:20:15 +0100810 f_dfu->usb_function.strings = dfu_generic_strings;
811 f_dfu->usb_function.setup = dfu_handle;
Lukasz Majewski33fac4a2013-12-09 16:20:14 +0100812 f_dfu->poll_timeout = DFU_DEFAULT_POLL_TIMEOUT;
Lukasz Majewskib819ddb2012-08-06 14:41:06 +0200813
814 status = usb_add_function(c, &f_dfu->usb_function);
815 if (status)
816 free(f_dfu);
817
818 return status;
819}
820
821int dfu_add(struct usb_configuration *c)
822{
823 int id;
824
825 id = usb_string_id(c->cdev);
826 if (id < 0)
827 return id;
828 strings_dfu_generic[0].id = id;
829 dfu_intf_runtime.iInterface = id;
830
831 debug("%s: cdev: 0x%p gadget:0x%p gadget->ep0: 0x%p\n", __func__,
832 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0);
833
834 return dfu_bind_config(c);
835}
Mateusz Zalegac4d0e852014-04-28 21:13:28 +0200836
837DECLARE_GADGET_BIND_CALLBACK(usb_dnl_dfu, dfu_add);