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uboot-usbtty-acm.patch
[u-boot-openmoko/mini2440.git] / drivers / serial / usbtty.c
blobfb5eb257a0421021c087e1be3b5b6a4c55f49d3f
1 /*
2 * (C) Copyright 2003
3 * Gerry Hamel, geh@ti.com, Texas Instruments
4 *
5 * (C) Copyright 2006
6 * Bryan O'Donoghue, bodonoghue@codehermit.ie
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24 #include <common.h>
25
26 #ifdef CONFIG_USB_TTY
27
28 #include <asm/io.h>
29 #include <circbuf.h>
30 #include <devices.h>
31 #include "usbtty.h"
32 #include "usb_cdc_acm.h"
33 #include "usbdescriptors.h"
34 #include <config.h> /* If defined, override Linux identifiers with
35 * vendor specific ones */
36
37 #if 0
38 #define TTYDBG(fmt,args...)\
39 serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args)
40 #else
41 #define TTYDBG(fmt,args...) do{}while(0)
42 #endif
43
44 #if 1
45 #define TTYERR(fmt,args...)\
46 serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,\
47 __LINE__,##args)
48 #else
49 #define TTYERR(fmt,args...) do{}while(0)
50 #endif
51
52 /*
53 * Defines
54 */
55 #define NUM_CONFIGS 1
56 #define MAX_INTERFACES 2
57 #define NUM_ENDPOINTS 3
58 #define ACM_TX_ENDPOINT 3
59 #define ACM_RX_ENDPOINT 2
60 #define GSERIAL_TX_ENDPOINT 2
61 #define GSERIAL_RX_ENDPOINT 1
62 #define NUM_ACM_INTERFACES 2
63 #define NUM_GSERIAL_INTERFACES 1
64 #define CONFIG_USBD_DATA_INTERFACE_STR "Bulk Data Interface"
65 #define CONFIG_USBD_CTRL_INTERFACE_STR "Control Interface"
66
67 /*
68 * Buffers to hold input and output data
69 */
70 #define USBTTY_BUFFER_SIZE 256
71 static circbuf_t usbtty_input;
72 static circbuf_t usbtty_output;
73
74
75 /*
76 * Instance variables
77 */
78 static device_t usbttydev;
79 static struct usb_device_instance device_instance[1];
80 static struct usb_bus_instance bus_instance[1];
81 static struct usb_configuration_instance config_instance[NUM_CONFIGS];
82 static struct usb_interface_instance interface_instance[MAX_INTERFACES];
83 static struct usb_alternate_instance alternate_instance[MAX_INTERFACES];
84 /* one extra for control endpoint */
85 static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1];
86
87 /*
88 * Global flag
89 */
90 int usbtty_configured_flag = 0;
91
92 /*
93 * Serial number
94 */
95 static char serial_number[16];
96
97
98 /*
99 * Descriptors, Strings, Local variables.
100 */
101
102 /* defined and used by usbdcore_ep0.c */
103 extern struct usb_string_descriptor **usb_strings;
104
105 /* Indicies, References */
106 static unsigned short rx_endpoint = 0;
107 static unsigned short tx_endpoint = 0;
108 static unsigned short interface_count = 0;
109 static struct usb_string_descriptor *usbtty_string_table[STR_COUNT];
110
111 /* USB Descriptor Strings */
112 static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4};
113 static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)];
114 static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)];
115 static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)];
116 static u8 wstrConfiguration[2 + 2*(sizeof(CONFIG_USBD_CONFIGURATION_STR)-1)];
117 static u8 wstrDataInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)];
118 static u8 wstrCtrlInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)];
119
120 /* Standard USB Data Structures */
121 static struct usb_interface_descriptor interface_descriptors[MAX_INTERFACES];
122 static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS];
123 static struct usb_configuration_descriptor *configuration_descriptor = 0;
124 static struct usb_device_descriptor device_descriptor = {
125 .bLength = sizeof(struct usb_device_descriptor),
126 .bDescriptorType = USB_DT_DEVICE,
127 .bcdUSB = cpu_to_le16(USB_BCD_VERSION),
128 .bDeviceSubClass = 0x00,
129 .bDeviceProtocol = 0x00,
130 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE,
131 .idVendor = cpu_to_le16(CONFIG_USBD_VENDORID),
132 .bcdDevice = cpu_to_le16(USBTTY_BCD_DEVICE),
133 .iManufacturer = STR_MANUFACTURER,
134 .iProduct = STR_PRODUCT,
135 .iSerialNumber = STR_SERIAL,
136 .bNumConfigurations = NUM_CONFIGS
137 };
138
139
140 /*
141 * Static CDC ACM specific descriptors
142 */
143
144 struct acm_config_desc {
145 struct usb_configuration_descriptor configuration_desc;
146
147 /* Master Interface */
148 struct usb_interface_descriptor interface_desc;
149
150 struct usb_class_header_function_descriptor usb_class_header;
151 struct usb_class_call_management_descriptor usb_class_call_mgt;
152 struct usb_class_abstract_control_descriptor usb_class_acm;
153 struct usb_class_union_function_descriptor usb_class_union;
154 struct usb_endpoint_descriptor notification_endpoint;
155
156 /* Slave Interface */
157 struct usb_interface_descriptor data_class_interface;
158 struct usb_endpoint_descriptor
159 data_endpoints[NUM_ENDPOINTS-1] __attribute__((packed));
160 } __attribute__((packed));
161
162 static struct acm_config_desc acm_configuration_descriptors[NUM_CONFIGS] = {
163 {
164 .configuration_desc ={
165 .bLength =
166 sizeof(struct usb_configuration_descriptor),
167 .bDescriptorType = USB_DT_CONFIG,
168 .wTotalLength =
169 cpu_to_le16(sizeof(struct acm_config_desc)),
170 .bNumInterfaces = NUM_ACM_INTERFACES,
171 .bConfigurationValue = 1,
172 .iConfiguration = STR_CONFIG,
173 .bmAttributes =
174 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED,
175 .bMaxPower = USBTTY_MAXPOWER
176 },
177 /* Interface 1 */
178 .interface_desc = {
179 .bLength = sizeof(struct usb_interface_descriptor),
180 .bDescriptorType = USB_DT_INTERFACE,
181 .bInterfaceNumber = 0,
182 .bAlternateSetting = 0,
183 .bNumEndpoints = 0x01,
184 .bInterfaceClass =
185 COMMUNICATIONS_INTERFACE_CLASS_CONTROL,
186 .bInterfaceSubClass = COMMUNICATIONS_ACM_SUBCLASS,
187 .bInterfaceProtocol = COMMUNICATIONS_V25TER_PROTOCOL,
188 .iInterface = STR_CTRL_INTERFACE,
189 },
190 .usb_class_header = {
191 .bFunctionLength =
192 sizeof(struct usb_class_header_function_descriptor),
193 .bDescriptorType = CS_INTERFACE,
194 .bDescriptorSubtype = USB_ST_HEADER,
195 .bcdCDC = cpu_to_le16(110),
196 },
197 .usb_class_call_mgt = {
198 .bFunctionLength =
199 sizeof(struct usb_class_call_management_descriptor),
200 .bDescriptorType = CS_INTERFACE,
201 .bDescriptorSubtype = USB_ST_CMF,
202 .bmCapabilities = 0x00,
203 .bDataInterface = 0x01,
204 },
205 .usb_class_acm = {
206 .bFunctionLength =
207 sizeof(struct usb_class_abstract_control_descriptor),
208 .bDescriptorType = CS_INTERFACE,
209 .bDescriptorSubtype = USB_ST_ACMF,
210 .bmCapabilities = 0x00,
211 },
212 .usb_class_union = {
213 .bFunctionLength =
214 sizeof(struct usb_class_union_function_descriptor),
215 .bDescriptorType = CS_INTERFACE,
216 .bDescriptorSubtype = USB_ST_UF,
217 .bMasterInterface = 0x00,
218 .bSlaveInterface0 = 0x01,
219 },
220 .notification_endpoint = {
221 .bLength =
222 sizeof(struct usb_endpoint_descriptor),
223 .bDescriptorType = USB_DT_ENDPOINT,
224 .bEndpointAddress = 0x01 | USB_DIR_IN,
225 .bmAttributes = USB_ENDPOINT_XFER_INT,
226 .wMaxPacketSize
227 = cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE),
228 .bInterval = 0xFF,
229 },
230
231 /* Interface 2 */
232 .data_class_interface = {
233 .bLength =
234 sizeof(struct usb_interface_descriptor),
235 .bDescriptorType = USB_DT_INTERFACE,
236 .bInterfaceNumber = 0x01,
237 .bAlternateSetting = 0x00,
238 .bNumEndpoints = 0x02,
239 .bInterfaceClass =
240 COMMUNICATIONS_INTERFACE_CLASS_DATA,
241 .bInterfaceSubClass = DATA_INTERFACE_SUBCLASS_NONE,
242 .bInterfaceProtocol = DATA_INTERFACE_PROTOCOL_NONE,
243 .iInterface = STR_DATA_INTERFACE,
244 },
245 .data_endpoints = {
246 {
247 .bLength =
248 sizeof(struct usb_endpoint_descriptor),
249 .bDescriptorType = USB_DT_ENDPOINT,
250 .bEndpointAddress = 0x02 | USB_DIR_OUT,
251 .bmAttributes =
252 USB_ENDPOINT_XFER_BULK,
253 .wMaxPacketSize =
254 cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE),
255 .bInterval = 0xFF,
256 },
257 {
258 .bLength =
259 sizeof(struct usb_endpoint_descriptor),
260 .bDescriptorType = USB_DT_ENDPOINT,
261 .bEndpointAddress = 0x03 | USB_DIR_IN,
262 .bmAttributes =
263 USB_ENDPOINT_XFER_BULK,
264 .wMaxPacketSize =
265 cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE),
266 .bInterval = 0xFF,
267 },
268 },
269 },
270 };
271
272 static struct rs232_emu rs232_desc={
273 .dter = 115200,
274 .stop_bits = 0x00,
275 .parity = 0x00,
276 .data_bits = 0x08
277 };
278
279
280 /*
281 * Static Generic Serial specific data
282 */
283
284
285 struct gserial_config_desc {
286
287 struct usb_configuration_descriptor configuration_desc;
288 struct usb_interface_descriptor
289 interface_desc[NUM_GSERIAL_INTERFACES] __attribute__((packed));
290 struct usb_endpoint_descriptor
291 data_endpoints[NUM_ENDPOINTS] __attribute__((packed));
292
293 } __attribute__((packed));
294
295 static struct gserial_config_desc
296 gserial_configuration_descriptors[NUM_CONFIGS] ={
297 {
298 .configuration_desc ={
299 .bLength = sizeof(struct usb_configuration_descriptor),
300 .bDescriptorType = USB_DT_CONFIG,
301 .wTotalLength =
302 cpu_to_le16(sizeof(struct gserial_config_desc)),
303 .bNumInterfaces = NUM_GSERIAL_INTERFACES,
304 .bConfigurationValue = 1,
305 .iConfiguration = STR_CONFIG,
306 .bmAttributes =
307 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED,
308 .bMaxPower = USBTTY_MAXPOWER
309 },
310 .interface_desc = {
311 {
312 .bLength =
313 sizeof(struct usb_interface_descriptor),
314 .bDescriptorType = USB_DT_INTERFACE,
315 .bInterfaceNumber = 0,
316 .bAlternateSetting = 0,
317 .bNumEndpoints = NUM_ENDPOINTS,
318 .bInterfaceClass =
319 COMMUNICATIONS_INTERFACE_CLASS_VENDOR,
320 .bInterfaceSubClass =
321 COMMUNICATIONS_NO_SUBCLASS,
322 .bInterfaceProtocol =
323 COMMUNICATIONS_NO_PROTOCOL,
324 .iInterface = STR_DATA_INTERFACE
325 },
326 },
327 .data_endpoints = {
328 {
329 .bLength =
330 sizeof(struct usb_endpoint_descriptor),
331 .bDescriptorType = USB_DT_ENDPOINT,
332 .bEndpointAddress = 0x01 | USB_DIR_OUT,
333 .bmAttributes = USB_ENDPOINT_XFER_BULK,
334 .wMaxPacketSize =
335 cpu_to_le16(CONFIG_USBD_SERIAL_OUT_PKTSIZE),
336 .bInterval= 0xFF,
337 },
338 {
339 .bLength =
340 sizeof(struct usb_endpoint_descriptor),
341 .bDescriptorType = USB_DT_ENDPOINT,
342 .bEndpointAddress = 0x02 | USB_DIR_IN,
343 .bmAttributes = USB_ENDPOINT_XFER_BULK,
344 .wMaxPacketSize =
345 cpu_to_le16(CONFIG_USBD_SERIAL_IN_PKTSIZE),
346 .bInterval = 0xFF,
347 },
348 {
349 .bLength =
350 sizeof(struct usb_endpoint_descriptor),
351 .bDescriptorType = USB_DT_ENDPOINT,
352 .bEndpointAddress = 0x03 | USB_DIR_IN,
353 .bmAttributes = USB_ENDPOINT_XFER_INT,
354 .wMaxPacketSize =
355 cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE),
356 .bInterval = 0xFF,
357 },
358 },
359 },
360 };
361
362 /*
363 * Static Function Prototypes
364 */
365
366 static void usbtty_init_strings (void);
367 static void usbtty_init_instances (void);
368 static void usbtty_init_endpoints (void);
369 static void usbtty_init_terminal_type(short type);
370 static void usbtty_event_handler (struct usb_device_instance *device,
371 usb_device_event_t event, int data);
372 static int usbtty_cdc_setup(struct usb_device_request *request,
373 struct urb *urb);
374 static int usbtty_configured (void);
375 static int write_buffer (circbuf_t * buf);
376 static int fill_buffer (circbuf_t * buf);
377
378 void usbtty_poll (void);
379
380 /* utility function for converting char* to wide string used by USB */
381 static void str2wide (char *str, u16 * wide)
382 {
383 int i;
384 for (i = 0; i < strlen (str) && str[i]; i++){
385 #if defined(__LITTLE_ENDIAN)
386 wide[i] = (u16) str[i];
387 #elif defined(__BIG_ENDIAN)
388 wide[i] = ((u16)(str[i])<<8);
389 #else
390 #error "__LITTLE_ENDIAN or __BIG_ENDIAN undefined"
391 #endif
392 }
393 }
394
395 /*
396 * Test whether a character is in the RX buffer
397 */
398
399 int usbtty_tstc (void)
400 {
401 struct usb_endpoint_instance *endpoint =
402 &endpoint_instance[rx_endpoint];
403
404 /* If no input data exists, allow more RX to be accepted */
405 if(usbtty_input.size <= 0){
406 udc_unset_nak(endpoint->endpoint_address&0x03);
407 }
408
409 usbtty_poll ();
410 return (usbtty_input.size > 0);
411 }
412
413 /*
414 * Read a single byte from the usb client port. Returns 1 on success, 0
415 * otherwise. When the function is succesfull, the character read is
416 * written into its argument c.
417 */
418
419 int usbtty_getc (void)
420 {
421 char c;
422 struct usb_endpoint_instance *endpoint =
423 &endpoint_instance[rx_endpoint];
424
425 while (usbtty_input.size <= 0) {
426 udc_unset_nak(endpoint->endpoint_address&0x03);
427 usbtty_poll ();
428 }
429
430 buf_pop (&usbtty_input, &c, 1);
431 udc_set_nak(endpoint->endpoint_address&0x03);
432
433 return c;
434 }
435
436 /*
437 * Output a single byte to the usb client port.
438 */
439 void usbtty_putc (const char c)
440 {
441 buf_push (&usbtty_output, &c, 1);
442 /* If \n, also do \r */
443 if (c == '\n')
444 buf_push (&usbtty_output, "\r", 1);
445
446 /* Poll at end to handle new data... */
447 if ((usbtty_output.size + 2) >= usbtty_output.totalsize) {
448 usbtty_poll ();
449 }
450 }
451
452 /* usbtty_puts() helper function for finding the next '\n' in a string */
453 static int next_nl_pos (const char *s)
454 {
455 int i;
456
457 for (i = 0; s[i] != '\0'; i++) {
458 if (s[i] == '\n')
459 return i;
460 }
461 return i;
462 }
463
464 /*
465 * Output a string to the usb client port - implementing flow control
466 */
467
468 static void __usbtty_puts (const char *str, int len)
469 {
470 int maxlen = usbtty_output.totalsize;
471 int space, n;
472
473 /* break str into chunks < buffer size, if needed */
474 while (len > 0) {
475 usbtty_poll ();
476
477 space = maxlen - usbtty_output.size;
478
479 /* If the USB is not configured, allow the circular buffer to
480 be overwritten. Otherwise this while() will loop forever. */
481 if (!usbtty_configured())
482 space = maxlen;
483
484 /* Empty buffer here, if needed, to ensure space... */
485 if (space) {
486 write_buffer (&usbtty_output);
487
488 n = MIN (space, MIN (len, maxlen));
489 buf_push (&usbtty_output, str, n);
490
491 str += n;
492 len -= n;
493 }
494 }
495 }
496
497 void usbtty_puts (const char *str)
498 {
499 int n;
500 int len = strlen (str);
501
502 /* add '\r' for each '\n' */
503 while (len > 0) {
504 n = next_nl_pos (str);
505
506 if (str[n] == '\n') {
507 __usbtty_puts (str, n + 1);
508 __usbtty_puts ("\r", 1);
509 str += (n + 1);
510 len -= (n + 1);
511 } else {
512 /* No \n found. All done. */
513 __usbtty_puts (str, n);
514 break;
515 }
516 }
517
518 /* Poll at end to handle new data... */
519 usbtty_poll ();
520 }
521
522 /*
523 * Initialize the usb client port.
524 *
525 */
526 int drv_usbtty_init (void)
527 {
528 int rc;
529 char * sn;
530 char * tt;
531 int snlen;
532
533 /* Ger seiral number */
534 if (!(sn = getenv("serial#"))) {
535 sn = "000000000000";
536 }
537 snlen = strlen(sn);
538 if (snlen > sizeof(serial_number) - 1) {
539 printf ("Warning: serial number %s is too long (%d > %d)\n",
540 sn, snlen, sizeof(serial_number) - 1);
541 snlen = sizeof(serial_number) - 1;
542 }
543 memcpy (serial_number, sn, snlen);
544 serial_number[snlen] = '\0';
545
546 /* Decide on which type of UDC device to be.
547 */
548
549 if(!(tt = getenv("usbtty"))) {
550 tt = "generic";
551 }
552 usbtty_init_terminal_type(strcmp(tt,"cdc_acm"));
553
554 /* Decide on which type of UDC device to be.
555 */
556
557 if(!(tt = getenv("usbtty"))) {
558 tt = "generic";
559 }
560 usbtty_init_terminal_type(strcmp(tt,"cdc_acm"));
561
562 /* prepare buffers... */
563 buf_init (&usbtty_input, USBTTY_BUFFER_SIZE);
564 buf_init (&usbtty_output, USBTTY_BUFFER_SIZE);
565
566 /* Now, set up USB controller and infrastructure */
567 udc_init (); /* Basic USB initialization */
568
569 usbtty_init_strings ();
570 usbtty_init_instances ();
571
572 udc_startup_events (device_instance);/* Enable dev, init udc pointers */
573 udc_connect (); /* Enable pullup for host detection */
574
575 usbtty_init_endpoints ();
576
577 /* Device initialization */
578 memset (&usbttydev, 0, sizeof (usbttydev));
579
580 strcpy (usbttydev.name, "usbtty");
581 usbttydev.ext = 0; /* No extensions */
582 usbttydev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT;
583 usbttydev.tstc = usbtty_tstc; /* 'tstc' function */
584 usbttydev.getc = usbtty_getc; /* 'getc' function */
585 usbttydev.putc = usbtty_putc; /* 'putc' function */
586 usbttydev.puts = usbtty_puts; /* 'puts' function */
587
588 rc = device_register (&usbttydev);
589
590 return (rc == 0) ? 1 : rc;
591 }
592
593 static void usbtty_init_strings (void)
594 {
595 struct usb_string_descriptor *string;
596
597 usbtty_string_table[STR_LANG] =
598 (struct usb_string_descriptor*)wstrLang;
599
600 string = (struct usb_string_descriptor *) wstrManufacturer;
601 string->bLength = sizeof(wstrManufacturer);
602 string->bDescriptorType = USB_DT_STRING;
603 str2wide (CONFIG_USBD_MANUFACTURER, string->wData);
604 usbtty_string_table[STR_MANUFACTURER]=string;
605
606
607 string = (struct usb_string_descriptor *) wstrProduct;
608 string->bLength = sizeof(wstrProduct);
609 string->bDescriptorType = USB_DT_STRING;
610 str2wide (CONFIG_USBD_PRODUCT_NAME, string->wData);
611 usbtty_string_table[STR_PRODUCT]=string;
612
613
614 string = (struct usb_string_descriptor *) wstrSerial;
615 string->bLength = sizeof(serial_number);
616 string->bDescriptorType = USB_DT_STRING;
617 str2wide (serial_number, string->wData);
618 usbtty_string_table[STR_SERIAL]=string;
619
620
621 string = (struct usb_string_descriptor *) wstrConfiguration;
622 string->bLength = sizeof(wstrConfiguration);
623 string->bDescriptorType = USB_DT_STRING;
624 str2wide (CONFIG_USBD_CONFIGURATION_STR, string->wData);
625 usbtty_string_table[STR_CONFIG]=string;
626
627
628 string = (struct usb_string_descriptor *) wstrDataInterface;
629 string->bLength = sizeof(wstrDataInterface);
630 string->bDescriptorType = USB_DT_STRING;
631 str2wide (CONFIG_USBD_DATA_INTERFACE_STR, string->wData);
632 usbtty_string_table[STR_DATA_INTERFACE]=string;
633
634 string = (struct usb_string_descriptor *) wstrCtrlInterface;
635 string->bLength = sizeof(wstrCtrlInterface);
636 string->bDescriptorType = USB_DT_STRING;
637 str2wide (CONFIG_USBD_CTRL_INTERFACE_STR, string->wData);
638 usbtty_string_table[STR_CTRL_INTERFACE]=string;
639
640 /* Now, initialize the string table for ep0 handling */
641 usb_strings = usbtty_string_table;
642 }
643
644 static void usbtty_init_instances (void)
645 {
646 int i;
647
648 /* initialize device instance */
649 memset (device_instance, 0, sizeof (struct usb_device_instance));
650 device_instance->device_state = STATE_INIT;
651 device_instance->device_descriptor = &device_descriptor;
652 device_instance->event = usbtty_event_handler;
653 device_instance->cdc_recv_setup = usbtty_cdc_setup;
654 device_instance->bus = bus_instance;
655 device_instance->configurations = NUM_CONFIGS;
656 device_instance->configuration_instance_array = config_instance;
657
658 /* initialize bus instance */
659 memset (bus_instance, 0, sizeof (struct usb_bus_instance));
660 bus_instance->device = device_instance;
661 bus_instance->endpoint_array = endpoint_instance;
662 bus_instance->max_endpoints = 1;
663 bus_instance->maxpacketsize = 64;
664 bus_instance->serial_number_str = serial_number;
665
666 /* configuration instance */
667 memset (config_instance, 0,
668 sizeof (struct usb_configuration_instance));
669 config_instance->interfaces = interface_count;
670 config_instance->configuration_descriptor = configuration_descriptor;
671 config_instance->interface_instance_array = interface_instance;
672
673 /* interface instance */
674 memset (interface_instance, 0,
675 sizeof (struct usb_interface_instance));
676 interface_instance->alternates = 1;
677 interface_instance->alternates_instance_array = alternate_instance;
678
679 /* alternates instance */
680 memset (alternate_instance, 0,
681 sizeof (struct usb_alternate_instance));
682 alternate_instance->interface_descriptor = interface_descriptors;
683 alternate_instance->endpoints = NUM_ENDPOINTS;
684 alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs;
685
686 /* endpoint instances */
687 memset (&endpoint_instance[0], 0,
688 sizeof (struct usb_endpoint_instance));
689 endpoint_instance[0].endpoint_address = 0;
690 endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE;
691 endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL;
692 endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE;
693 endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL;
694 udc_setup_ep (device_instance, 0, &endpoint_instance[0]);
695
696 for (i = 1; i <= NUM_ENDPOINTS; i++) {
697 memset (&endpoint_instance[i], 0,
698 sizeof (struct usb_endpoint_instance));
699
700 endpoint_instance[i].endpoint_address =
701 ep_descriptor_ptrs[i - 1]->bEndpointAddress;
702
703 endpoint_instance[i].rcv_attributes =
704 ep_descriptor_ptrs[i - 1]->bmAttributes;
705
706 endpoint_instance[i].rcv_packetSize =
707 le16_to_cpu(ep_descriptor_ptrs[i - 1]->wMaxPacketSize);
708
709 endpoint_instance[i].tx_attributes =
710 ep_descriptor_ptrs[i - 1]->bmAttributes;
711
712 endpoint_instance[i].tx_packetSize =
713 le16_to_cpu(ep_descriptor_ptrs[i - 1]->wMaxPacketSize);
714
715 endpoint_instance[i].tx_attributes =
716 ep_descriptor_ptrs[i - 1]->bmAttributes;
717
718 urb_link_init (&endpoint_instance[i].rcv);
719 urb_link_init (&endpoint_instance[i].rdy);
720 urb_link_init (&endpoint_instance[i].tx);
721 urb_link_init (&endpoint_instance[i].done);
722
723 if (endpoint_instance[i].endpoint_address & USB_DIR_IN)
724 endpoint_instance[i].tx_urb =
725 usbd_alloc_urb (device_instance,
726 &endpoint_instance[i]);
727 else
728 endpoint_instance[i].rcv_urb =
729 usbd_alloc_urb (device_instance,
730 &endpoint_instance[i]);
731 }
732 }
733
734 static void usbtty_init_endpoints (void)
735 {
736 int i;
737
738 bus_instance->max_endpoints = NUM_ENDPOINTS + 1;
739 for (i = 1; i <= NUM_ENDPOINTS; i++) {
740 udc_setup_ep (device_instance, i, &endpoint_instance[i]);
741 }
742 }
743
744 /* usbtty_init_terminal_type
745 *
746 * Do some late binding for our device type.
747 */
748 static void usbtty_init_terminal_type(short type)
749 {
750 switch(type){
751 /* CDC ACM */
752 case 0:
753 /* Assign endpoint descriptors */
754 ep_descriptor_ptrs[0] =
755 &acm_configuration_descriptors[0].notification_endpoint;
756 ep_descriptor_ptrs[1] =
757 &acm_configuration_descriptors[0].data_endpoints[0];
758 ep_descriptor_ptrs[2] =
759 &acm_configuration_descriptors[0].data_endpoints[1];
760
761 /* Enumerate Device Descriptor */
762 device_descriptor.bDeviceClass =
763 COMMUNICATIONS_DEVICE_CLASS;
764 device_descriptor.idProduct =
765 cpu_to_le16(CONFIG_USBD_PRODUCTID_CDCACM);
766
767 /* Assign endpoint indices */
768 tx_endpoint = ACM_TX_ENDPOINT;
769 rx_endpoint = ACM_RX_ENDPOINT;
770
771 /* Configuration Descriptor */
772 configuration_descriptor =
773 (struct usb_configuration_descriptor*)
774 &acm_configuration_descriptors;
775
776 /* Interface count */
777 interface_count = NUM_ACM_INTERFACES;
778 break;
779
780 /* BULK IN/OUT & Default */
781 case 1:
782 default:
783 /* Assign endpoint descriptors */
784 ep_descriptor_ptrs[0] =
785 &gserial_configuration_descriptors[0].data_endpoints[0];
786 ep_descriptor_ptrs[1] =
787 &gserial_configuration_descriptors[0].data_endpoints[1];
788 ep_descriptor_ptrs[2] =
789 &gserial_configuration_descriptors[0].data_endpoints[2];
790
791 /* Enumerate Device Descriptor */
792 device_descriptor.bDeviceClass = 0xFF;
793 device_descriptor.idProduct =
794 cpu_to_le16(CONFIG_USBD_PRODUCTID_GSERIAL);
795
796 /* Assign endpoint indices */
797 tx_endpoint = GSERIAL_TX_ENDPOINT;
798 rx_endpoint = GSERIAL_RX_ENDPOINT;
799
800 /* Configuration Descriptor */
801 configuration_descriptor =
802 (struct usb_configuration_descriptor*)
803 &gserial_configuration_descriptors;
804
805 /* Interface count */
806 interface_count = NUM_GSERIAL_INTERFACES;
807 break;
808 }
809 }
810
811 /******************************************************************************/
812
813 static struct urb *next_urb (struct usb_device_instance *device,
814 struct usb_endpoint_instance *endpoint)
815 {
816 struct urb *current_urb = NULL;
817 int space;
818
819 /* If there's a queue, then we should add to the last urb */
820 if (!endpoint->tx_queue) {
821 current_urb = endpoint->tx_urb;
822 } else {
823 /* Last urb from tx chain */
824 current_urb =
825 p2surround (struct urb, link, endpoint->tx.prev);
826 }
827
828 /* Make sure this one has enough room */
829 space = current_urb->buffer_length - current_urb->actual_length;
830 if (space > 0) {
831 return current_urb;
832 } else { /* No space here */
833 /* First look at done list */
834 current_urb = first_urb_detached (&endpoint->done);
835 if (!current_urb) {
836 current_urb = usbd_alloc_urb (device, endpoint);
837 }
838
839 urb_append (&endpoint->tx, current_urb);
840 endpoint->tx_queue++;
841 }
842 return current_urb;
843 }
844
845 static int write_buffer (circbuf_t * buf)
846 {
847 if (!usbtty_configured ()) {
848 return 0;
849 }
850
851 struct usb_endpoint_instance *endpoint =
852 &endpoint_instance[tx_endpoint];
853 struct urb *current_urb = NULL;
854
855 current_urb = next_urb (device_instance, endpoint);
856 /* TX data still exists - send it now
857 */
858 if(endpoint->sent < current_urb->actual_length){
859 if(udc_endpoint_write (endpoint)){
860 /* Write pre-empted by RX */
861 return -1;
862 }
863 }
864
865 if (buf->size) {
866 char *dest;
867
868 int space_avail;
869 int popnum, popped;
870 int total = 0;
871
872 /* Break buffer into urb sized pieces,
873 * and link each to the endpoint
874 */
875 while (buf->size > 0) {
876
877 if (!current_urb) {
878 TTYERR ("current_urb is NULL, buf->size %d\n",
879 buf->size);
880 return total;
881 }
882
883 dest = (char*)current_urb->buffer +
884 current_urb->actual_length;
885
886 space_avail =
887 current_urb->buffer_length -
888 current_urb->actual_length;
889 popnum = MIN (space_avail, buf->size);
890 if (popnum == 0)
891 break;
892
893 popped = buf_pop (buf, dest, popnum);
894 if (popped == 0)
895 break;
896 current_urb->actual_length += popped;
897 total += popped;
898
899 /* If endpoint->last == 0, then transfers have
900 * not started on this endpoint
901 */
902 if (endpoint->last == 0) {
903 if(udc_endpoint_write (endpoint)){
904 /* Write pre-empted by RX */
905 return -1;
906 }
907 }
908
909 }/* end while */
910 return total;
911 }
912
913 return 0;
914 }
915
916 static int fill_buffer (circbuf_t * buf)
917 {
918 struct usb_endpoint_instance *endpoint =
919 &endpoint_instance[rx_endpoint];
920
921 if (endpoint->rcv_urb && endpoint->rcv_urb->actual_length) {
922 unsigned int nb = 0;
923 char *src = (char *) endpoint->rcv_urb->buffer;
924 unsigned int rx_avail = buf->totalsize - buf->size;
925
926 if(rx_avail >= endpoint->rcv_urb->actual_length){
927
928 nb = endpoint->rcv_urb->actual_length;
929 buf_push (buf, src, nb);
930 endpoint->rcv_urb->actual_length = 0;
931
932 }
933 return nb;
934 }
935 return 0;
936 }
937
938 static int usbtty_configured (void)
939 {
940 return usbtty_configured_flag;
941 }
942
943 /******************************************************************************/
944
945 static void usbtty_event_handler (struct usb_device_instance *device,
946 usb_device_event_t event, int data)
947 {
948 switch (event) {
949 case DEVICE_RESET:
950 case DEVICE_BUS_INACTIVE:
951 usbtty_configured_flag = 0;
952 break;
953 case DEVICE_CONFIGURED:
954 usbtty_configured_flag = 1;
955 break;
956
957 case DEVICE_ADDRESS_ASSIGNED:
958 usbtty_init_endpoints ();
959
960 default:
961 break;
962 }
963 }
964
965 /******************************************************************************/
966
967 int usbtty_cdc_setup(struct usb_device_request *request, struct urb *urb)
968 {
969 switch (request->bRequest){
970
971 case ACM_SET_CONTROL_LINE_STATE: /* Implies DTE ready */
972 break;
973 case ACM_SEND_ENCAPSULATED_COMMAND : /* Required */
974 break;
975 case ACM_SET_LINE_ENCODING : /* DTE stop/parity bits
976 * per character */
977 break;
978 case ACM_GET_ENCAPSULATED_RESPONSE : /* request response */
979 break;
980 case ACM_GET_LINE_ENCODING : /* request DTE rate,
981 * stop/parity bits */
982 memcpy (urb->buffer , &rs232_desc, sizeof(rs232_desc));
983 urb->actual_length = sizeof(rs232_desc);
984
985 break;
986 default:
987 return 1;
988 }
989 return 0;
990 }
991
992 /******************************************************************************/
993
994 /*
995 * Since interrupt handling has not yet been implemented, we use this function
996 * to handle polling. This is called by the tstc,getc,putc,puts routines to
997 * update the USB state.
998 */
999 void usbtty_poll (void)
1000 {
1001 /* New interrupts? */
1002 udc_irq();
1003
1004 /* Write any output data to host buffer
1005 * (do this before checking interrupts to avoid missing one)
1006 */
1007 if (usbtty_configured ()) {
1008 write_buffer (&usbtty_output);
1009 }
1010
1011 /* New interrupts? */
1012 udc_irq();
1013
1014 /* Check for new data from host..
1015 * (do this after checking interrupts to get latest data)
1016 */
1017 if (usbtty_configured ()) {
1018 fill_buffer (&usbtty_input);
1019 }
1020
1021 /* New interrupts? */
1022 udc_irq();
1023
1024 }
1025
1026
1027 #endif
Fork of the u-boot for for Samsung based MINI2440 board