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10#include <common.h>
11#include <config.h>
12#include <circbuf.h>
13#include <env.h>
14#include <serial.h>
15#include <stdio_dev.h>
16#include <asm/unaligned.h>
17#include "usbtty.h"
18#include "usb_cdc_acm.h"
19#include "usbdescriptors.h"
20
21#ifdef DEBUG
22#define TTYDBG(fmt,args...)\
23 serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args)
24#else
25#define TTYDBG(fmt,args...) do{}while(0)
26#endif
27
28#if 1
29#define TTYERR(fmt,args...)\
30 serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,\
31 __LINE__,##args)
32#else
33#define TTYERR(fmt,args...) do{}while(0)
34#endif
35
36
37
38
39#define NUM_CONFIGS 1
40#define MAX_INTERFACES 2
41#define NUM_ENDPOINTS 3
42#define ACM_TX_ENDPOINT 3
43#define ACM_RX_ENDPOINT 2
44#define GSERIAL_TX_ENDPOINT 2
45#define GSERIAL_RX_ENDPOINT 1
46#define NUM_ACM_INTERFACES 2
47#define NUM_GSERIAL_INTERFACES 1
48#define CFG_USBD_DATA_INTERFACE_STR "Bulk Data Interface"
49#define CFG_USBD_CTRL_INTERFACE_STR "Control Interface"
50
51
52
53
54#define USBTTY_BUFFER_SIZE 2048
55static circbuf_t usbtty_input;
56static circbuf_t usbtty_output;
57
58
59
60
61
62static struct stdio_dev usbttydev;
63static struct usb_device_instance device_instance[1];
64static struct usb_bus_instance bus_instance[1];
65static struct usb_configuration_instance config_instance[NUM_CONFIGS];
66static struct usb_interface_instance interface_instance[MAX_INTERFACES];
67static struct usb_alternate_instance alternate_instance[MAX_INTERFACES];
68
69static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1];
70
71
72
73
74int usbtty_configured_flag = 0;
75
76
77
78
79static char serial_number[16];
80
81
82
83
84
85
86
87extern struct usb_string_descriptor **usb_strings;
88
89
90static unsigned short rx_endpoint = 0;
91static unsigned short tx_endpoint = 0;
92static unsigned short interface_count = 0;
93static struct usb_string_descriptor *usbtty_string_table[STR_COUNT];
94
95
96static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4};
97static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)];
98static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)];
99static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)];
100static u8 wstrConfiguration[2 + 2*(sizeof(CFG_USBD_CONFIGURATION_STR)-1)];
101static u8 wstrDataInterface[2 + 2*(sizeof(CFG_USBD_DATA_INTERFACE_STR)-1)];
102static u8 wstrCtrlInterface[2 + 2*(sizeof(CFG_USBD_DATA_INTERFACE_STR)-1)];
103
104
105static struct usb_interface_descriptor interface_descriptors[MAX_INTERFACES];
106static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS];
107static struct usb_configuration_descriptor *configuration_descriptor = 0;
108static struct usb_device_descriptor device_descriptor = {
109 .bLength = sizeof(struct usb_device_descriptor),
110 .bDescriptorType = USB_DT_DEVICE,
111 .bcdUSB = cpu_to_le16(USB_BCD_VERSION),
112 .bDeviceSubClass = 0x00,
113 .bDeviceProtocol = 0x00,
114 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE,
115 .idVendor = cpu_to_le16(CONFIG_USBD_VENDORID),
116 .bcdDevice = cpu_to_le16(USBTTY_BCD_DEVICE),
117 .iManufacturer = STR_MANUFACTURER,
118 .iProduct = STR_PRODUCT,
119 .iSerialNumber = STR_SERIAL,
120 .bNumConfigurations = NUM_CONFIGS
121};
122
123
124
125
126
127struct acm_config_desc {
128 struct usb_configuration_descriptor configuration_desc;
129
130
131 struct usb_interface_descriptor interface_desc;
132
133 struct usb_class_header_function_descriptor usb_class_header;
134 struct usb_class_call_management_descriptor usb_class_call_mgt;
135 struct usb_class_abstract_control_descriptor usb_class_acm;
136 struct usb_class_union_function_descriptor usb_class_union;
137 struct usb_endpoint_descriptor notification_endpoint;
138
139
140 struct usb_interface_descriptor data_class_interface;
141 struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS-1];
142} __attribute__((packed));
143
144static struct acm_config_desc acm_configuration_descriptors[NUM_CONFIGS] = {
145 {
146 .configuration_desc ={
147 .bLength =
148 sizeof(struct usb_configuration_descriptor),
149 .bDescriptorType = USB_DT_CONFIG,
150 .wTotalLength =
151 cpu_to_le16(sizeof(struct acm_config_desc)),
152 .bNumInterfaces = NUM_ACM_INTERFACES,
153 .bConfigurationValue = 1,
154 .iConfiguration = STR_CONFIG,
155 .bmAttributes =
156 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED,
157 .bMaxPower = USBTTY_MAXPOWER
158 },
159
160 .interface_desc = {
161 .bLength = sizeof(struct usb_interface_descriptor),
162 .bDescriptorType = USB_DT_INTERFACE,
163 .bInterfaceNumber = 0,
164 .bAlternateSetting = 0,
165 .bNumEndpoints = 0x01,
166 .bInterfaceClass =
167 COMMUNICATIONS_INTERFACE_CLASS_CONTROL,
168 .bInterfaceSubClass = COMMUNICATIONS_ACM_SUBCLASS,
169 .bInterfaceProtocol = COMMUNICATIONS_V25TER_PROTOCOL,
170 .iInterface = STR_CTRL_INTERFACE,
171 },
172 .usb_class_header = {
173 .bFunctionLength =
174 sizeof(struct usb_class_header_function_descriptor),
175 .bDescriptorType = CS_INTERFACE,
176 .bDescriptorSubtype = USB_ST_HEADER,
177 .bcdCDC = cpu_to_le16(110),
178 },
179 .usb_class_call_mgt = {
180 .bFunctionLength =
181 sizeof(struct usb_class_call_management_descriptor),
182 .bDescriptorType = CS_INTERFACE,
183 .bDescriptorSubtype = USB_ST_CMF,
184 .bmCapabilities = 0x00,
185 .bDataInterface = 0x01,
186 },
187 .usb_class_acm = {
188 .bFunctionLength =
189 sizeof(struct usb_class_abstract_control_descriptor),
190 .bDescriptorType = CS_INTERFACE,
191 .bDescriptorSubtype = USB_ST_ACMF,
192 .bmCapabilities = 0x00,
193 },
194 .usb_class_union = {
195 .bFunctionLength =
196 sizeof(struct usb_class_union_function_descriptor),
197 .bDescriptorType = CS_INTERFACE,
198 .bDescriptorSubtype = USB_ST_UF,
199 .bMasterInterface = 0x00,
200 .bSlaveInterface0 = 0x01,
201 },
202 .notification_endpoint = {
203 .bLength =
204 sizeof(struct usb_endpoint_descriptor),
205 .bDescriptorType = USB_DT_ENDPOINT,
206 .bEndpointAddress = UDC_INT_ENDPOINT | USB_DIR_IN,
207 .bmAttributes = USB_ENDPOINT_XFER_INT,
208 .wMaxPacketSize
209 = cpu_to_le16(CFG_USBD_SERIAL_INT_PKTSIZE),
210 .bInterval = 0xFF,
211 },
212
213
214 .data_class_interface = {
215 .bLength =
216 sizeof(struct usb_interface_descriptor),
217 .bDescriptorType = USB_DT_INTERFACE,
218 .bInterfaceNumber = 0x01,
219 .bAlternateSetting = 0x00,
220 .bNumEndpoints = 0x02,
221 .bInterfaceClass =
222 COMMUNICATIONS_INTERFACE_CLASS_DATA,
223 .bInterfaceSubClass = DATA_INTERFACE_SUBCLASS_NONE,
224 .bInterfaceProtocol = DATA_INTERFACE_PROTOCOL_NONE,
225 .iInterface = STR_DATA_INTERFACE,
226 },
227 .data_endpoints = {
228 {
229 .bLength =
230 sizeof(struct usb_endpoint_descriptor),
231 .bDescriptorType = USB_DT_ENDPOINT,
232 .bEndpointAddress = UDC_OUT_ENDPOINT | USB_DIR_OUT,
233 .bmAttributes =
234 USB_ENDPOINT_XFER_BULK,
235 .wMaxPacketSize =
236 cpu_to_le16(CFG_USBD_SERIAL_BULK_PKTSIZE),
237 .bInterval = 0xFF,
238 },
239 {
240 .bLength =
241 sizeof(struct usb_endpoint_descriptor),
242 .bDescriptorType = USB_DT_ENDPOINT,
243 .bEndpointAddress = UDC_IN_ENDPOINT | USB_DIR_IN,
244 .bmAttributes =
245 USB_ENDPOINT_XFER_BULK,
246 .wMaxPacketSize =
247 cpu_to_le16(CFG_USBD_SERIAL_BULK_PKTSIZE),
248 .bInterval = 0xFF,
249 },
250 },
251 },
252};
253
254static struct rs232_emu rs232_desc={
255 .dter = 115200,
256 .stop_bits = 0x00,
257 .parity = 0x00,
258 .data_bits = 0x08
259};
260
261
262
263
264
265
266
267struct gserial_config_desc {
268
269 struct usb_configuration_descriptor configuration_desc;
270 struct usb_interface_descriptor interface_desc[NUM_GSERIAL_INTERFACES];
271 struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS];
272
273} __attribute__((packed));
274
275static struct gserial_config_desc
276gserial_configuration_descriptors[NUM_CONFIGS] ={
277 {
278 .configuration_desc ={
279 .bLength = sizeof(struct usb_configuration_descriptor),
280 .bDescriptorType = USB_DT_CONFIG,
281 .wTotalLength =
282 cpu_to_le16(sizeof(struct gserial_config_desc)),
283 .bNumInterfaces = NUM_GSERIAL_INTERFACES,
284 .bConfigurationValue = 1,
285 .iConfiguration = STR_CONFIG,
286 .bmAttributes =
287 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED,
288 .bMaxPower = USBTTY_MAXPOWER
289 },
290 .interface_desc = {
291 {
292 .bLength =
293 sizeof(struct usb_interface_descriptor),
294 .bDescriptorType = USB_DT_INTERFACE,
295 .bInterfaceNumber = 0,
296 .bAlternateSetting = 0,
297 .bNumEndpoints = NUM_ENDPOINTS,
298 .bInterfaceClass =
299 COMMUNICATIONS_INTERFACE_CLASS_VENDOR,
300 .bInterfaceSubClass =
301 COMMUNICATIONS_NO_SUBCLASS,
302 .bInterfaceProtocol =
303 COMMUNICATIONS_NO_PROTOCOL,
304 .iInterface = STR_DATA_INTERFACE
305 },
306 },
307 .data_endpoints = {
308 {
309 .bLength =
310 sizeof(struct usb_endpoint_descriptor),
311 .bDescriptorType = USB_DT_ENDPOINT,
312 .bEndpointAddress = UDC_OUT_ENDPOINT | USB_DIR_OUT,
313 .bmAttributes = USB_ENDPOINT_XFER_BULK,
314 .wMaxPacketSize =
315 cpu_to_le16(CFG_USBD_SERIAL_OUT_PKTSIZE),
316 .bInterval= 0xFF,
317 },
318 {
319 .bLength =
320 sizeof(struct usb_endpoint_descriptor),
321 .bDescriptorType = USB_DT_ENDPOINT,
322 .bEndpointAddress = UDC_IN_ENDPOINT | USB_DIR_IN,
323 .bmAttributes = USB_ENDPOINT_XFER_BULK,
324 .wMaxPacketSize =
325 cpu_to_le16(CFG_USBD_SERIAL_IN_PKTSIZE),
326 .bInterval = 0xFF,
327 },
328 {
329 .bLength =
330 sizeof(struct usb_endpoint_descriptor),
331 .bDescriptorType = USB_DT_ENDPOINT,
332 .bEndpointAddress = UDC_INT_ENDPOINT | USB_DIR_IN,
333 .bmAttributes = USB_ENDPOINT_XFER_INT,
334 .wMaxPacketSize =
335 cpu_to_le16(CFG_USBD_SERIAL_INT_PKTSIZE),
336 .bInterval = 0xFF,
337 },
338 },
339 },
340};
341
342
343
344
345
346static void usbtty_init_strings (void);
347static void usbtty_init_instances (void);
348static void usbtty_init_endpoints (void);
349static void usbtty_init_terminal_type(short type);
350static void usbtty_event_handler (struct usb_device_instance *device,
351 usb_device_event_t event, int data);
352static int usbtty_cdc_setup(struct usb_device_request *request,
353 struct urb *urb);
354static int usbtty_configured (void);
355static int write_buffer (circbuf_t * buf);
356static int fill_buffer (circbuf_t * buf);
357
358void usbtty_poll (void);
359
360
361static void str2wide (char *str, u16 * wide)
362{
363 int i;
364 for (i = 0; i < strlen (str) && str[i]; i++){
365 #if defined(__LITTLE_ENDIAN)
366 wide[i] = (u16) str[i];
367 #elif defined(__BIG_ENDIAN)
368 wide[i] = ((u16)(str[i])<<8);
369 #else
370 #error "__LITTLE_ENDIAN or __BIG_ENDIAN undefined"
371 #endif
372 }
373}
374
375
376
377
378
379int usbtty_tstc(struct stdio_dev *dev)
380{
381 struct usb_endpoint_instance *endpoint =
382 &endpoint_instance[rx_endpoint];
383
384
385 if(usbtty_input.size <= 0){
386 udc_unset_nak(endpoint->endpoint_address&0x03);
387 }
388
389 usbtty_poll ();
390 return (usbtty_input.size > 0);
391}
392
393
394
395
396
397
398
399int usbtty_getc(struct stdio_dev *dev)
400{
401 char c;
402 struct usb_endpoint_instance *endpoint =
403 &endpoint_instance[rx_endpoint];
404
405 while (usbtty_input.size <= 0) {
406 udc_unset_nak(endpoint->endpoint_address&0x03);
407 usbtty_poll ();
408 }
409
410 buf_pop (&usbtty_input, &c, 1);
411 udc_set_nak(endpoint->endpoint_address&0x03);
412
413 return c;
414}
415
416
417
418
419void usbtty_putc(struct stdio_dev *dev, const char c)
420{
421 if (!usbtty_configured ())
422 return;
423
424
425 if (c == '\n')
426 buf_push (&usbtty_output, "\r", 1);
427
428 buf_push(&usbtty_output, &c, 1);
429
430
431 if ((usbtty_output.size + 2) >= usbtty_output.totalsize) {
432 usbtty_poll ();
433 }
434}
435
436
437static int next_nl_pos (const char *s)
438{
439 int i;
440
441 for (i = 0; s[i] != '\0'; i++) {
442 if (s[i] == '\n')
443 return i;
444 }
445 return i;
446}
447
448
449
450
451
452static void __usbtty_puts (const char *str, int len)
453{
454 int maxlen = usbtty_output.totalsize;
455 int space, n;
456
457
458 while (len > 0) {
459 usbtty_poll ();
460
461 space = maxlen - usbtty_output.size;
462
463 if (space) {
464 write_buffer (&usbtty_output);
465
466 n = min(space, min(len, maxlen));
467 buf_push (&usbtty_output, str, n);
468
469 str += n;
470 len -= n;
471 }
472 }
473}
474
475void usbtty_puts(struct stdio_dev *dev, const char *str)
476{
477 int n;
478 int len;
479
480 if (!usbtty_configured ())
481 return;
482
483 len = strlen (str);
484
485 while (len > 0) {
486 n = next_nl_pos (str);
487
488 if (str[n] == '\n') {
489 __usbtty_puts(str, n);
490 __usbtty_puts("\r\n", 2);
491 str += (n + 1);
492 len -= (n + 1);
493 } else {
494
495 __usbtty_puts (str, n);
496 break;
497 }
498 }
499
500
501 usbtty_poll ();
502}
503
504
505
506
507
508int drv_usbtty_init (void)
509{
510 int rc;
511 char * sn;
512 char * tt;
513 int snlen;
514
515
516 sn = env_get("serial#");
517 if (!sn)
518 sn = "000000000000";
519 snlen = strlen(sn);
520 if (snlen > sizeof(serial_number) - 1) {
521 printf ("Warning: serial number %s is too long (%d > %lu)\n",
522 sn, snlen, (ulong)(sizeof(serial_number) - 1));
523 snlen = sizeof(serial_number) - 1;
524 }
525 memcpy (serial_number, sn, snlen);
526 serial_number[snlen] = '\0';
527
528
529
530 tt = env_get("usbtty");
531 if (!tt)
532 tt = "generic";
533 usbtty_init_terminal_type(strcmp(tt,"cdc_acm"));
534
535
536 buf_init (&usbtty_input, USBTTY_BUFFER_SIZE);
537 buf_init (&usbtty_output, USBTTY_BUFFER_SIZE);
538
539
540 udc_init ();
541
542 usbtty_init_strings ();
543 usbtty_init_instances ();
544
545 usbtty_init_endpoints ();
546
547 udc_startup_events (device_instance);
548 udc_connect ();
549
550
551 memset (&usbttydev, 0, sizeof (usbttydev));
552
553 strcpy (usbttydev.name, "usbtty");
554 usbttydev.ext = 0;
555 usbttydev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT;
556 usbttydev.tstc = usbtty_tstc;
557 usbttydev.getc = usbtty_getc;
558 usbttydev.putc = usbtty_putc;
559 usbttydev.puts = usbtty_puts;
560
561 rc = stdio_register (&usbttydev);
562
563 return (rc == 0) ? 1 : rc;
564}
565
566static void usbtty_init_strings (void)
567{
568 struct usb_string_descriptor *string;
569
570 usbtty_string_table[STR_LANG] =
571 (struct usb_string_descriptor*)wstrLang;
572
573 string = (struct usb_string_descriptor *) wstrManufacturer;
574 string->bLength = sizeof(wstrManufacturer);
575 string->bDescriptorType = USB_DT_STRING;
576 str2wide (CONFIG_USBD_MANUFACTURER, string->wData);
577 usbtty_string_table[STR_MANUFACTURER]=string;
578
579
580 string = (struct usb_string_descriptor *) wstrProduct;
581 string->bLength = sizeof(wstrProduct);
582 string->bDescriptorType = USB_DT_STRING;
583 str2wide (CONFIG_USBD_PRODUCT_NAME, string->wData);
584 usbtty_string_table[STR_PRODUCT]=string;
585
586
587 string = (struct usb_string_descriptor *) wstrSerial;
588 string->bLength = sizeof(serial_number);
589 string->bDescriptorType = USB_DT_STRING;
590 str2wide (serial_number, string->wData);
591 usbtty_string_table[STR_SERIAL]=string;
592
593
594 string = (struct usb_string_descriptor *) wstrConfiguration;
595 string->bLength = sizeof(wstrConfiguration);
596 string->bDescriptorType = USB_DT_STRING;
597 str2wide (CFG_USBD_CONFIGURATION_STR, string->wData);
598 usbtty_string_table[STR_CONFIG]=string;
599
600
601 string = (struct usb_string_descriptor *) wstrDataInterface;
602 string->bLength = sizeof(wstrDataInterface);
603 string->bDescriptorType = USB_DT_STRING;
604 str2wide (CFG_USBD_DATA_INTERFACE_STR, string->wData);
605 usbtty_string_table[STR_DATA_INTERFACE]=string;
606
607 string = (struct usb_string_descriptor *) wstrCtrlInterface;
608 string->bLength = sizeof(wstrCtrlInterface);
609 string->bDescriptorType = USB_DT_STRING;
610 str2wide (CFG_USBD_CTRL_INTERFACE_STR, string->wData);
611 usbtty_string_table[STR_CTRL_INTERFACE]=string;
612
613
614 usb_strings = usbtty_string_table;
615}
616
617#define init_wMaxPacketSize(x) le16_to_cpu(get_unaligned(\
618 &ep_descriptor_ptrs[(x) - 1]->wMaxPacketSize));
619
620static void usbtty_init_instances (void)
621{
622 int i;
623
624
625 memset (device_instance, 0, sizeof (struct usb_device_instance));
626 device_instance->device_state = STATE_INIT;
627 device_instance->device_descriptor = &device_descriptor;
628 device_instance->event = usbtty_event_handler;
629 device_instance->cdc_recv_setup = usbtty_cdc_setup;
630 device_instance->bus = bus_instance;
631 device_instance->configurations = NUM_CONFIGS;
632 device_instance->configuration_instance_array = config_instance;
633
634
635 memset (bus_instance, 0, sizeof (struct usb_bus_instance));
636 bus_instance->device = device_instance;
637 bus_instance->endpoint_array = endpoint_instance;
638 bus_instance->max_endpoints = 1;
639 bus_instance->maxpacketsize = 64;
640 bus_instance->serial_number_str = serial_number;
641
642
643 memset (config_instance, 0,
644 sizeof (struct usb_configuration_instance));
645 config_instance->interfaces = interface_count;
646 config_instance->configuration_descriptor = configuration_descriptor;
647 config_instance->interface_instance_array = interface_instance;
648
649
650 memset (interface_instance, 0,
651 sizeof (struct usb_interface_instance));
652 interface_instance->alternates = 1;
653 interface_instance->alternates_instance_array = alternate_instance;
654
655
656 memset (alternate_instance, 0,
657 sizeof (struct usb_alternate_instance));
658 alternate_instance->interface_descriptor = interface_descriptors;
659 alternate_instance->endpoints = NUM_ENDPOINTS;
660 alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs;
661
662
663 memset (&endpoint_instance[0], 0,
664 sizeof (struct usb_endpoint_instance));
665 endpoint_instance[0].endpoint_address = 0;
666 endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE;
667 endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL;
668 endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE;
669 endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL;
670 udc_setup_ep (device_instance, 0, &endpoint_instance[0]);
671
672 for (i = 1; i <= NUM_ENDPOINTS; i++) {
673 memset (&endpoint_instance[i], 0,
674 sizeof (struct usb_endpoint_instance));
675
676 endpoint_instance[i].endpoint_address =
677 ep_descriptor_ptrs[i - 1]->bEndpointAddress;
678
679 endpoint_instance[i].rcv_attributes =
680 ep_descriptor_ptrs[i - 1]->bmAttributes;
681
682 endpoint_instance[i].rcv_packetSize = init_wMaxPacketSize(i);
683
684 endpoint_instance[i].tx_attributes =
685 ep_descriptor_ptrs[i - 1]->bmAttributes;
686
687 endpoint_instance[i].tx_packetSize = init_wMaxPacketSize(i);
688
689 endpoint_instance[i].tx_attributes =
690 ep_descriptor_ptrs[i - 1]->bmAttributes;
691
692 urb_link_init (&endpoint_instance[i].rcv);
693 urb_link_init (&endpoint_instance[i].rdy);
694 urb_link_init (&endpoint_instance[i].tx);
695 urb_link_init (&endpoint_instance[i].done);
696
697 if (endpoint_instance[i].endpoint_address & USB_DIR_IN)
698 endpoint_instance[i].tx_urb =
699 usbd_alloc_urb (device_instance,
700 &endpoint_instance[i]);
701 else
702 endpoint_instance[i].rcv_urb =
703 usbd_alloc_urb (device_instance,
704 &endpoint_instance[i]);
705 }
706}
707
708static void usbtty_init_endpoints (void)
709{
710 int i;
711
712 bus_instance->max_endpoints = NUM_ENDPOINTS + 1;
713 for (i = 1; i <= NUM_ENDPOINTS; i++) {
714 udc_setup_ep (device_instance, i, &endpoint_instance[i]);
715 }
716}
717
718
719
720
721
722static void usbtty_init_terminal_type(short type)
723{
724 switch(type){
725
726 case 0:
727
728 ep_descriptor_ptrs[0] =
729 &acm_configuration_descriptors[0].notification_endpoint;
730 ep_descriptor_ptrs[1] =
731 &acm_configuration_descriptors[0].data_endpoints[0];
732 ep_descriptor_ptrs[2] =
733 &acm_configuration_descriptors[0].data_endpoints[1];
734
735
736 device_descriptor.bDeviceClass =
737 COMMUNICATIONS_DEVICE_CLASS;
738 device_descriptor.idProduct =
739 cpu_to_le16(CONFIG_USBD_PRODUCTID_CDCACM);
740
741
742 tx_endpoint = ACM_TX_ENDPOINT;
743 rx_endpoint = ACM_RX_ENDPOINT;
744
745
746 configuration_descriptor =
747 (struct usb_configuration_descriptor*)
748 &acm_configuration_descriptors;
749
750
751 interface_count = NUM_ACM_INTERFACES;
752 break;
753
754
755 case 1:
756 default:
757
758 ep_descriptor_ptrs[0] =
759 &gserial_configuration_descriptors[0].data_endpoints[0];
760 ep_descriptor_ptrs[1] =
761 &gserial_configuration_descriptors[0].data_endpoints[1];
762 ep_descriptor_ptrs[2] =
763 &gserial_configuration_descriptors[0].data_endpoints[2];
764
765
766 device_descriptor.bDeviceClass = 0xFF;
767 device_descriptor.idProduct =
768 cpu_to_le16(CONFIG_USBD_PRODUCTID_GSERIAL);
769
770 tx_endpoint = GSERIAL_TX_ENDPOINT;
771 rx_endpoint = GSERIAL_RX_ENDPOINT;
772
773
774 configuration_descriptor =
775 (struct usb_configuration_descriptor*)
776 &gserial_configuration_descriptors;
777
778
779 interface_count = NUM_GSERIAL_INTERFACES;
780 break;
781 }
782}
783
784
785
786static struct urb *next_urb (struct usb_device_instance *device,
787 struct usb_endpoint_instance *endpoint)
788{
789 struct urb *current_urb = NULL;
790 int space;
791
792
793 if (!endpoint->tx_queue) {
794 current_urb = endpoint->tx_urb;
795 } else {
796
797 current_urb =
798 p2surround (struct urb, link, endpoint->tx.prev);
799 }
800
801
802 space = current_urb->buffer_length - current_urb->actual_length;
803 if (space > 0) {
804 return current_urb;
805 } else {
806
807 current_urb = first_urb_detached (&endpoint->done);
808 if (!current_urb) {
809 current_urb = usbd_alloc_urb (device, endpoint);
810 }
811
812 urb_append (&endpoint->tx, current_urb);
813 endpoint->tx_queue++;
814 }
815 return current_urb;
816}
817
818static int write_buffer (circbuf_t * buf)
819{
820 if (!usbtty_configured ()) {
821 return 0;
822 }
823
824 struct usb_endpoint_instance *endpoint =
825 &endpoint_instance[tx_endpoint];
826 struct urb *current_urb = NULL;
827
828
829
830 if(endpoint->sent < endpoint->tx_urb->actual_length){
831 if(udc_endpoint_write (endpoint)){
832
833 return -1;
834 }
835 }
836
837 if (buf->size) {
838 char *dest;
839
840 int space_avail;
841 int popnum, popped;
842 int total = 0;
843
844
845
846
847 while (buf->size > 0) {
848
849 current_urb = next_urb (device_instance, endpoint);
850
851 dest = (char*)current_urb->buffer +
852 current_urb->actual_length;
853
854 space_avail =
855 current_urb->buffer_length -
856 current_urb->actual_length;
857 popnum = min(space_avail, (int)buf->size);
858 if (popnum == 0)
859 break;
860
861 popped = buf_pop (buf, dest, popnum);
862 if (popped == 0)
863 break;
864 current_urb->actual_length += popped;
865 total += popped;
866
867
868
869
870 if (endpoint->last == 0) {
871 if(udc_endpoint_write (endpoint)){
872
873 return -1;
874 }
875 }
876
877 }
878 return total;
879 }
880
881 return 0;
882}
883
884static int fill_buffer (circbuf_t * buf)
885{
886 struct usb_endpoint_instance *endpoint =
887 &endpoint_instance[rx_endpoint];
888
889 if (endpoint->rcv_urb && endpoint->rcv_urb->actual_length) {
890 unsigned int nb = 0;
891 char *src = (char *) endpoint->rcv_urb->buffer;
892 unsigned int rx_avail = buf->totalsize - buf->size;
893
894 if(rx_avail >= endpoint->rcv_urb->actual_length){
895
896 nb = endpoint->rcv_urb->actual_length;
897 buf_push (buf, src, nb);
898 endpoint->rcv_urb->actual_length = 0;
899
900 }
901 return nb;
902 }
903 return 0;
904}
905
906static int usbtty_configured (void)
907{
908 return usbtty_configured_flag;
909}
910
911
912
913static void usbtty_event_handler (struct usb_device_instance *device,
914 usb_device_event_t event, int data)
915{
916 switch (event) {
917 case DEVICE_RESET:
918 case DEVICE_BUS_INACTIVE:
919 usbtty_configured_flag = 0;
920 break;
921 case DEVICE_CONFIGURED:
922 usbtty_configured_flag = 1;
923 break;
924
925 case DEVICE_ADDRESS_ASSIGNED:
926 usbtty_init_endpoints ();
927
928 default:
929 break;
930 }
931}
932
933
934
935int usbtty_cdc_setup(struct usb_device_request *request, struct urb *urb)
936{
937 switch (request->bRequest){
938
939 case ACM_SET_CONTROL_LINE_STATE:
940 break;
941 case ACM_SEND_ENCAPSULATED_COMMAND :
942 break;
943 case ACM_SET_LINE_ENCODING :
944
945 break;
946 case ACM_GET_ENCAPSULATED_RESPONSE :
947 break;
948 case ACM_GET_LINE_ENCODING :
949
950 memcpy (urb->buffer , &rs232_desc, sizeof(rs232_desc));
951 urb->actual_length = sizeof(rs232_desc);
952
953 break;
954 default:
955 return 1;
956 }
957 return 0;
958}
959
960
961
962
963
964
965
966
967void usbtty_poll (void)
968{
969
970 udc_irq();
971
972
973
974
975 if (usbtty_configured ()) {
976 write_buffer (&usbtty_output);
977 }
978
979
980 udc_irq();
981
982
983
984
985 if (usbtty_configured ()) {
986 fill_buffer (&usbtty_input);
987 }
988
989
990 udc_irq();
991
992}
993
