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USB: Option driver: Short driver names were identical
[usb.git] / drivers / usb / serial / io_edgeport.c
blobc49976c3ad52cf7924aaf07ac3f208a5005dfc98
1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/tty.h>
38 #include <linux/tty_driver.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/spinlock.h>
42 #include <linux/serial.h>
43 #include <linux/ioctl.h>
44 #include <linux/wait.h>
45 #include <asm/uaccess.h>
46 #include <linux/usb.h>
47 #include <linux/usb/serial.h>
48 #include "io_edgeport.h"
49 #include "io_ionsp.h" /* info for the iosp messages */
50 #include "io_16654.h" /* 16654 UART defines */
51
52 /*
53 * Version Information
54 */
55 #define DRIVER_VERSION "v2.7"
56 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
57 #define DRIVER_DESC "Edgeport USB Serial Driver"
58
59 /* First, the latest boot code - for first generation edgeports */
60 #define IMAGE_ARRAY_NAME BootCodeImage_GEN1
61 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1
62 #include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */
63
64 /* for second generation edgeports */
65 #define IMAGE_ARRAY_NAME BootCodeImage_GEN2
66 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2
67 #include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */
68
69 /* Then finally the main run-time operational code - for first generation edgeports */
70 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1
71 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1
72 #include "io_fw_down.h" /* Define array OperationalCodeImage[] */
73
74 /* for second generation edgeports */
75 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2
76 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2
77 #include "io_fw_down2.h" /* Define array OperationalCodeImage[] */
78
79 #define MAX_NAME_LEN 64
80
81 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
82 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
83 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
84
85 /* receive port state */
86 enum RXSTATE {
87 EXPECT_HDR1 = 0, /* Expect header byte 1 */
88 EXPECT_HDR2 = 1, /* Expect header byte 2 */
89 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
90 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
91 };
92
93
94 /* Transmit Fifo
95 * This Transmit queue is an extension of the edgeport Rx buffer.
96 * The maximum amount of data buffered in both the edgeport
97 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
98 */
99 struct TxFifo {
100 unsigned int head; /* index to head pointer (write) */
101 unsigned int tail; /* index to tail pointer (read) */
102 unsigned int count; /* Bytes in queue */
103 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
104 unsigned char *fifo; /* allocated Buffer */
105 };
106
107 /* This structure holds all of the local port information */
108 struct edgeport_port {
109 __u16 txCredits; /* our current credits for this port */
110 __u16 maxTxCredits; /* the max size of the port */
111
112 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
113 struct urb *write_urb; /* write URB for this port */
114 char write_in_progress; /* TRUE while a write URB is outstanding */
115 spinlock_t ep_lock;
116
117 __u8 shadowLCR; /* last LCR value received */
118 __u8 shadowMCR; /* last MCR value received */
119 __u8 shadowMSR; /* last MSR value received */
120 __u8 shadowLSR; /* last LSR value received */
121 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
122 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
123 __u8 validDataMask;
124 __u32 baudRate;
125
126 char open;
127 char openPending;
128 char commandPending;
129 char closePending;
130 char chaseResponsePending;
131
132 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
133 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
134 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
135 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
136
137 struct async_icount icount;
138 struct usb_serial_port *port; /* loop back to the owner of this object */
139 };
140
141
142 /* This structure holds all of the individual device information */
143 struct edgeport_serial {
144 char name[MAX_NAME_LEN+2]; /* string name of this device */
145
146 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
147 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
148 struct edgeport_product_info product_info; /* Product Info */
149
150 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
151 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
152 struct urb * interrupt_read_urb; /* our interrupt urb */
153
154 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
155 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
156 struct urb * read_urb; /* our bulk read urb */
157 int read_in_progress;
158 spinlock_t es_lock;
159
160 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
161
162 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
163
164 enum RXSTATE rxState; /* the current state of the bulk receive processor */
165 __u8 rxHeader1; /* receive header byte 1 */
166 __u8 rxHeader2; /* receive header byte 2 */
167 __u8 rxHeader3; /* receive header byte 3 */
168 __u8 rxPort; /* the port that we are currently receiving data for */
169 __u8 rxStatusCode; /* the receive status code */
170 __u8 rxStatusParam; /* the receive status paramater */
171 __s16 rxBytesRemaining; /* the number of port bytes left to read */
172 struct usb_serial *serial; /* loop back to the owner of this object */
173 };
174
175 /* baud rate information */
176 struct divisor_table_entry {
177 __u32 BaudRate;
178 __u16 Divisor;
179 };
180
181 //
182 // Define table of divisors for Rev A EdgePort/4 hardware
183 // These assume a 3.6864MHz crystal, the standard /16, and
184 // MCR.7 = 0.
185 //
186 static const struct divisor_table_entry divisor_table[] = {
187 { 50, 4608},
188 { 75, 3072},
189 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
190 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
191 { 150, 1536},
192 { 300, 768},
193 { 600, 384},
194 { 1200, 192},
195 { 1800, 128},
196 { 2400, 96},
197 { 4800, 48},
198 { 7200, 32},
199 { 9600, 24},
200 { 14400, 16},
201 { 19200, 12},
202 { 38400, 6},
203 { 57600, 4},
204 { 115200, 2},
205 { 230400, 1},
206 };
207
208 /* local variables */
209 static int debug;
210
211 static int low_latency = 1; /* tty low latency flag, on by default */
212
213 static int CmdUrbs = 0; /* Number of outstanding Command Write Urbs */
214
215
216 /* local function prototypes */
217
218 /* function prototypes for all URB callbacks */
219 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs);
220 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs);
221 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs);
222 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs);
223
224 /* function prototypes for the usbserial callbacks */
225 static int edge_open (struct usb_serial_port *port, struct file *filp);
226 static void edge_close (struct usb_serial_port *port, struct file *filp);
227 static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count);
228 static int edge_write_room (struct usb_serial_port *port);
229 static int edge_chars_in_buffer (struct usb_serial_port *port);
230 static void edge_throttle (struct usb_serial_port *port);
231 static void edge_unthrottle (struct usb_serial_port *port);
232 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios);
233 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
234 static void edge_break (struct usb_serial_port *port, int break_state);
235 static int edge_tiocmget (struct usb_serial_port *port, struct file *file);
236 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
237 static int edge_startup (struct usb_serial *serial);
238 static void edge_shutdown (struct usb_serial *serial);
239
240
241 #include "io_tables.h" /* all of the devices that this driver supports */
242
243 static struct usb_driver io_driver = {
244 .name = "io_edgeport",
245 .probe = usb_serial_probe,
246 .disconnect = usb_serial_disconnect,
247 .id_table = id_table_combined,
248 .no_dynamic_id = 1,
249 };
250
251 /* function prototypes for all of our local functions */
252 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
253 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
254 static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
255 static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr);
256 static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
257 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param);
258 static int calc_baud_rate_divisor (int baud_rate, int *divisor);
259 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate);
260 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios);
261 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
262 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
263 static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
264
265 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
266 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
267 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
268 static void get_manufacturing_desc (struct edgeport_serial *edge_serial);
269 static void get_boot_desc (struct edgeport_serial *edge_serial);
270 static void load_application_firmware (struct edgeport_serial *edge_serial);
271
272 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size);
273
274
275 // ************************************************************************
276 // ************************************************************************
277 // ************************************************************************
278 // ************************************************************************
279
280 /************************************************************************
281 * *
282 * update_edgeport_E2PROM() Compare current versions of *
283 * Boot ROM and Manufacture *
284 * Descriptors with versions *
285 * embedded in this driver *
286 * *
287 ************************************************************************/
288 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
289 {
290 __u32 BootCurVer;
291 __u32 BootNewVer;
292 __u8 BootMajorVersion;
293 __u8 BootMinorVersion;
294 __le16 BootBuildNumber;
295 __u8 *BootImage;
296 __u32 BootSize;
297 struct edge_firmware_image_record *record;
298 unsigned char *firmware;
299 int response;
300
301
302 switch (edge_serial->product_info.iDownloadFile) {
303 case EDGE_DOWNLOAD_FILE_I930:
304 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion;
305 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion;
306 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber);
307 BootImage = &BootCodeImage_GEN1[0];
308 BootSize = sizeof( BootCodeImage_GEN1 );
309 break;
310
311 case EDGE_DOWNLOAD_FILE_80251:
312 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion;
313 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion;
314 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber);
315 BootImage = &BootCodeImage_GEN2[0];
316 BootSize = sizeof( BootCodeImage_GEN2 );
317 break;
318
319 default:
320 return;
321 }
322
323 // Check Boot Image Version
324 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
325 (edge_serial->boot_descriptor.MinorVersion << 16) +
326 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
327
328 BootNewVer = (BootMajorVersion << 24) +
329 (BootMinorVersion << 16) +
330 le16_to_cpu(BootBuildNumber);
331
332 dbg("Current Boot Image version %d.%d.%d",
333 edge_serial->boot_descriptor.MajorVersion,
334 edge_serial->boot_descriptor.MinorVersion,
335 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
336
337
338 if (BootNewVer > BootCurVer) {
339 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
340 edge_serial->boot_descriptor.MajorVersion,
341 edge_serial->boot_descriptor.MinorVersion,
342 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
343 BootMajorVersion,
344 BootMinorVersion,
345 le16_to_cpu(BootBuildNumber));
346
347
348 dbg("Downloading new Boot Image");
349
350 firmware = BootImage;
351
352 for (;;) {
353 record = (struct edge_firmware_image_record *)firmware;
354 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
355 if (response < 0) {
356 dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
357 break;
358 }
359 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
360 if (firmware >= &BootImage[BootSize]) {
361 break;
362 }
363 }
364 } else {
365 dbg("Boot Image -- already up to date");
366 }
367 }
368
369
370 /************************************************************************
371 * *
372 * Get string descriptor from device *
373 * *
374 ************************************************************************/
375 static int get_string (struct usb_device *dev, int Id, char *string, int buflen)
376 {
377 struct usb_string_descriptor StringDesc;
378 struct usb_string_descriptor *pStringDesc;
379
380 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
381
382 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
383 return 0;
384 }
385
386 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
387
388 if (!pStringDesc) {
389 return 0;
390 }
391
392 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
393 kfree(pStringDesc);
394 return 0;
395 }
396
397 unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2);
398
399 kfree(pStringDesc);
400 return strlen(string);
401 }
402
403
404 #if 0
405 /************************************************************************
406 *
407 * Get string descriptor from device
408 *
409 ************************************************************************/
410 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
411 {
412 struct usb_string_descriptor StringDesc;
413 struct usb_string_descriptor *pStringDesc;
414
415 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
416
417 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
418 return 0;
419 }
420
421 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
422
423 if (!pStringDesc) {
424 return -1;
425 }
426
427 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
428 kfree(pStringDesc);
429 return -1;
430 }
431
432 *pRetDesc = pStringDesc;
433 return 0;
434 }
435 #endif
436
437 static void get_product_info(struct edgeport_serial *edge_serial)
438 {
439 struct edgeport_product_info *product_info = &edge_serial->product_info;
440
441 memset (product_info, 0, sizeof(struct edgeport_product_info));
442
443 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
444 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
445 product_info->ProdInfoVer = 0;
446
447 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
448 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
449 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
450 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
451
452 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion;
453 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion;
454 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber;
455
456 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
457
458 // check if this is 2nd generation hardware
459 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
460 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion;
461 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion;
462 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber);
463 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
464 } else {
465 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion;
466 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion;
467 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber);
468 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
469 }
470
471 // Determine Product type and set appropriate flags
472 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
473 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
474 case ION_DEVICE_ID_EDGEPORT_4T:
475 case ION_DEVICE_ID_EDGEPORT_4:
476 case ION_DEVICE_ID_EDGEPORT_2:
477 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
478 case ION_DEVICE_ID_EDGEPORT_8:
479 case ION_DEVICE_ID_EDGEPORT_421:
480 case ION_DEVICE_ID_EDGEPORT_21:
481 case ION_DEVICE_ID_EDGEPORT_2_DIN:
482 case ION_DEVICE_ID_EDGEPORT_4_DIN:
483 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
484 product_info->IsRS232 = 1;
485 break;
486
487 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485
488 product_info->IsRS422 = 1;
489 product_info->IsRS485 = 1;
490 break;
491
492 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422
493 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422
494 product_info->IsRS422 = 1;
495 break;
496 }
497
498 // Dump Product Info structure
499 dbg("**Product Information:");
500 dbg(" ProductId %x", product_info->ProductId );
501 dbg(" NumPorts %d", product_info->NumPorts );
502 dbg(" ProdInfoVer %d", product_info->ProdInfoVer );
503 dbg(" IsServer %d", product_info->IsServer);
504 dbg(" IsRS232 %d", product_info->IsRS232 );
505 dbg(" IsRS422 %d", product_info->IsRS422 );
506 dbg(" IsRS485 %d", product_info->IsRS485 );
507 dbg(" RomSize %d", product_info->RomSize );
508 dbg(" RamSize %d", product_info->RamSize );
509 dbg(" CpuRev %x", product_info->CpuRev );
510 dbg(" BoardRev %x", product_info->BoardRev);
511 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
512 product_info->BootMinorVersion,
513 le16_to_cpu(product_info->BootBuildNumber));
514 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion,
515 product_info->FirmwareMinorVersion,
516 le16_to_cpu(product_info->FirmwareBuildNumber));
517 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0],
518 product_info->ManufactureDescDate[1],
519 product_info->ManufactureDescDate[2]+1900);
520 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
521
522 }
523
524
525 /************************************************************************/
526 /************************************************************************/
527 /* U S B C A L L B A C K F U N C T I O N S */
528 /* U S B C A L L B A C K F U N C T I O N S */
529 /************************************************************************/
530 /************************************************************************/
531
532 /*****************************************************************************
533 * edge_interrupt_callback
534 * this is the callback function for when we have received data on the
535 * interrupt endpoint.
536 *****************************************************************************/
537 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs)
538 {
539 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
540 struct edgeport_port *edge_port;
541 struct usb_serial_port *port;
542 unsigned char *data = urb->transfer_buffer;
543 int length = urb->actual_length;
544 int bytes_avail;
545 int position;
546 int txCredits;
547 int portNumber;
548 int result;
549
550 dbg("%s", __FUNCTION__);
551
552 switch (urb->status) {
553 case 0:
554 /* success */
555 break;
556 case -ECONNRESET:
557 case -ENOENT:
558 case -ESHUTDOWN:
559 /* this urb is terminated, clean up */
560 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
561 return;
562 default:
563 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
564 goto exit;
565 }
566
567 // process this interrupt-read even if there are no ports open
568 if (length) {
569 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
570
571 if (length > 1) {
572 bytes_avail = data[0] | (data[1] << 8);
573 if (bytes_avail) {
574 spin_lock(&edge_serial->es_lock);
575 edge_serial->rxBytesAvail += bytes_avail;
576 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
577
578 if (edge_serial->rxBytesAvail > 0 &&
579 !edge_serial->read_in_progress) {
580 dbg("%s - posting a read", __FUNCTION__);
581 edge_serial->read_in_progress = TRUE;
582
583 /* we have pending bytes on the bulk in pipe, send a request */
584 edge_serial->read_urb->dev = edge_serial->serial->dev;
585 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
586 if (result) {
587 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result);
588 edge_serial->read_in_progress = FALSE;
589 }
590 }
591 spin_unlock(&edge_serial->es_lock);
592 }
593 }
594 /* grab the txcredits for the ports if available */
595 position = 2;
596 portNumber = 0;
597 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
598 txCredits = data[position] | (data[position+1] << 8);
599 if (txCredits) {
600 port = edge_serial->serial->port[portNumber];
601 edge_port = usb_get_serial_port_data(port);
602 if (edge_port->open) {
603 spin_lock(&edge_port->ep_lock);
604 edge_port->txCredits += txCredits;
605 spin_unlock(&edge_port->ep_lock);
606 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits);
607
608 /* tell the tty driver that something has changed */
609 if (edge_port->port->tty)
610 tty_wakeup(edge_port->port->tty);
611
612 // Since we have more credit, check if more data can be sent
613 send_more_port_data(edge_serial, edge_port);
614 }
615 }
616 position += 2;
617 ++portNumber;
618 }
619 }
620
621 exit:
622 result = usb_submit_urb (urb, GFP_ATOMIC);
623 if (result) {
624 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
625 }
626 }
627
628
629 /*****************************************************************************
630 * edge_bulk_in_callback
631 * this is the callback function for when we have received data on the
632 * bulk in endpoint.
633 *****************************************************************************/
634 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs)
635 {
636 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
637 unsigned char *data = urb->transfer_buffer;
638 int status;
639 __u16 raw_data_length;
640
641 dbg("%s", __FUNCTION__);
642
643 if (urb->status) {
644 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
645 edge_serial->read_in_progress = FALSE;
646 return;
647 }
648
649 if (urb->actual_length == 0) {
650 dbg("%s - read bulk callback with no data", __FUNCTION__);
651 edge_serial->read_in_progress = FALSE;
652 return;
653 }
654
655 raw_data_length = urb->actual_length;
656
657 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data);
658
659 spin_lock(&edge_serial->es_lock);
660
661 /* decrement our rxBytes available by the number that we just got */
662 edge_serial->rxBytesAvail -= raw_data_length;
663
664 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail);
665
666 process_rcvd_data (edge_serial, data, urb->actual_length);
667
668 /* check to see if there's any more data for us to read */
669 if (edge_serial->rxBytesAvail > 0) {
670 dbg("%s - posting a read", __FUNCTION__);
671 edge_serial->read_urb->dev = edge_serial->serial->dev;
672 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
673 if (status) {
674 dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status);
675 edge_serial->read_in_progress = FALSE;
676 }
677 } else {
678 edge_serial->read_in_progress = FALSE;
679 }
680
681 spin_unlock(&edge_serial->es_lock);
682 }
683
684
685 /*****************************************************************************
686 * edge_bulk_out_data_callback
687 * this is the callback function for when we have finished sending serial data
688 * on the bulk out endpoint.
689 *****************************************************************************/
690 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs)
691 {
692 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
693 struct tty_struct *tty;
694
695 dbg("%s", __FUNCTION__);
696
697 if (urb->status) {
698 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
699 }
700
701 tty = edge_port->port->tty;
702
703 if (tty && edge_port->open) {
704 /* let the tty driver wakeup if it has a special write_wakeup function */
705 tty_wakeup(tty);
706 }
707
708 // Release the Write URB
709 edge_port->write_in_progress = FALSE;
710
711 // Check if more data needs to be sent
712 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
713 }
714
715
716 /*****************************************************************************
717 * BulkOutCmdCallback
718 * this is the callback function for when we have finished sending a command
719 * on the bulk out endpoint.
720 *****************************************************************************/
721 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs)
722 {
723 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
724 struct tty_struct *tty;
725 int status = urb->status;
726
727 dbg("%s", __FUNCTION__);
728
729 CmdUrbs--;
730 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
731
732
733 /* clean up the transfer buffer */
734 kfree(urb->transfer_buffer);
735
736 /* Free the command urb */
737 usb_free_urb (urb);
738
739 if (status) {
740 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
741 return;
742 }
743
744 /* Get pointer to tty */
745 tty = edge_port->port->tty;
746
747 /* tell the tty driver that something has changed */
748 if (tty && edge_port->open)
749 tty_wakeup(tty);
750
751 /* we have completed the command */
752 edge_port->commandPending = FALSE;
753 wake_up(&edge_port->wait_command);
754 }
755
756
757 /*****************************************************************************
758 * Driver tty interface functions
759 *****************************************************************************/
760
761 /*****************************************************************************
762 * SerialOpen
763 * this function is called by the tty driver when a port is opened
764 * If successful, we return 0
765 * Otherwise we return a negative error number.
766 *****************************************************************************/
767 static int edge_open (struct usb_serial_port *port, struct file * filp)
768 {
769 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
770 struct usb_serial *serial;
771 struct edgeport_serial *edge_serial;
772 int response;
773
774 dbg("%s - port %d", __FUNCTION__, port->number);
775
776 if (edge_port == NULL)
777 return -ENODEV;
778
779 if (port->tty)
780 port->tty->low_latency = low_latency;
781
782 /* see if we've set up our endpoint info yet (can't set it up in edge_startup
783 as the structures were not set up at that time.) */
784 serial = port->serial;
785 edge_serial = usb_get_serial_data(serial);
786 if (edge_serial == NULL) {
787 return -ENODEV;
788 }
789 if (edge_serial->interrupt_in_buffer == NULL) {
790 struct usb_serial_port *port0 = serial->port[0];
791
792 /* not set up yet, so do it now */
793 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
794 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
795 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
796 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
797 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
798 edge_serial->read_urb = port0->read_urb;
799 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
800
801 /* set up our interrupt urb */
802 usb_fill_int_urb(edge_serial->interrupt_read_urb,
803 serial->dev,
804 usb_rcvintpipe(serial->dev,
805 port0->interrupt_in_endpointAddress),
806 port0->interrupt_in_buffer,
807 edge_serial->interrupt_read_urb->transfer_buffer_length,
808 edge_interrupt_callback, edge_serial,
809 edge_serial->interrupt_read_urb->interval);
810
811 /* set up our bulk in urb */
812 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
813 usb_rcvbulkpipe(serial->dev,
814 port0->bulk_in_endpointAddress),
815 port0->bulk_in_buffer,
816 edge_serial->read_urb->transfer_buffer_length,
817 edge_bulk_in_callback, edge_serial);
818 edge_serial->read_in_progress = FALSE;
819
820 /* start interrupt read for this edgeport
821 * this interrupt will continue as long as the edgeport is connected */
822 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
823 if (response) {
824 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
825 }
826 }
827
828 /* initialize our wait queues */
829 init_waitqueue_head(&edge_port->wait_open);
830 init_waitqueue_head(&edge_port->wait_chase);
831 init_waitqueue_head(&edge_port->delta_msr_wait);
832 init_waitqueue_head(&edge_port->wait_command);
833
834 /* initialize our icount structure */
835 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
836
837 /* initialize our port settings */
838 edge_port->txCredits = 0; /* Can't send any data yet */
839 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */
840 edge_port->chaseResponsePending = FALSE;
841
842 /* send a open port command */
843 edge_port->openPending = TRUE;
844 edge_port->open = FALSE;
845 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
846
847 if (response < 0) {
848 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
849 edge_port->openPending = FALSE;
850 return -ENODEV;
851 }
852
853 /* now wait for the port to be completely opened */
854 wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT);
855
856 if (edge_port->open == FALSE) {
857 /* open timed out */
858 dbg("%s - open timedout", __FUNCTION__);
859 edge_port->openPending = FALSE;
860 return -ENODEV;
861 }
862
863 /* create the txfifo */
864 edge_port->txfifo.head = 0;
865 edge_port->txfifo.tail = 0;
866 edge_port->txfifo.count = 0;
867 edge_port->txfifo.size = edge_port->maxTxCredits;
868 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
869
870 if (!edge_port->txfifo.fifo) {
871 dbg("%s - no memory", __FUNCTION__);
872 edge_close (port, filp);
873 return -ENOMEM;
874 }
875
876 /* Allocate a URB for the write */
877 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
878 edge_port->write_in_progress = FALSE;
879
880 if (!edge_port->write_urb) {
881 dbg("%s - no memory", __FUNCTION__);
882 edge_close (port, filp);
883 return -ENOMEM;
884 }
885
886 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
887
888 dbg("%s exited", __FUNCTION__);
889
890 return 0;
891 }
892
893
894 /************************************************************************
895 *
896 * block_until_chase_response
897 *
898 * This function will block the close until one of the following:
899 * 1. Response to our Chase comes from Edgeport
900 * 2. A timout of 10 seconds without activity has expired
901 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
902 *
903 ************************************************************************/
904 static void block_until_chase_response(struct edgeport_port *edge_port)
905 {
906 DEFINE_WAIT(wait);
907 __u16 lastCredits;
908 int timeout = 1*HZ;
909 int loop = 10;
910
911 while (1) {
912 // Save Last credits
913 lastCredits = edge_port->txCredits;
914
915 // Did we get our Chase response
916 if (edge_port->chaseResponsePending == FALSE) {
917 dbg("%s - Got Chase Response", __FUNCTION__);
918
919 // did we get all of our credit back?
920 if (edge_port->txCredits == edge_port->maxTxCredits ) {
921 dbg("%s - Got all credits", __FUNCTION__);
922 return;
923 }
924 }
925
926 // Block the thread for a while
927 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
928 schedule_timeout(timeout);
929 finish_wait(&edge_port->wait_chase, &wait);
930
931 if (lastCredits == edge_port->txCredits) {
932 // No activity.. count down.
933 loop--;
934 if (loop == 0) {
935 edge_port->chaseResponsePending = FALSE;
936 dbg("%s - Chase TIMEOUT", __FUNCTION__);
937 return;
938 }
939 } else {
940 // Reset timout value back to 10 seconds
941 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
942 loop = 10;
943 }
944 }
945 }
946
947
948 /************************************************************************
949 *
950 * block_until_tx_empty
951 *
952 * This function will block the close until one of the following:
953 * 1. TX count are 0
954 * 2. The edgeport has stopped
955 * 3. A timout of 3 seconds without activity has expired
956 *
957 ************************************************************************/
958 static void block_until_tx_empty (struct edgeport_port *edge_port)
959 {
960 DEFINE_WAIT(wait);
961 struct TxFifo *fifo = &edge_port->txfifo;
962 __u32 lastCount;
963 int timeout = HZ/10;
964 int loop = 30;
965
966 while (1) {
967 // Save Last count
968 lastCount = fifo->count;
969
970 // Is the Edgeport Buffer empty?
971 if (lastCount == 0) {
972 dbg("%s - TX Buffer Empty", __FUNCTION__);
973 return;
974 }
975
976 // Block the thread for a while
977 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
978 schedule_timeout(timeout);
979 finish_wait(&edge_port->wait_chase, &wait);
980
981 dbg("%s wait", __FUNCTION__);
982
983 if (lastCount == fifo->count) {
984 // No activity.. count down.
985 loop--;
986 if (loop == 0) {
987 dbg("%s - TIMEOUT", __FUNCTION__);
988 return;
989 }
990 } else {
991 // Reset timout value back to seconds
992 loop = 30;
993 }
994 }
995 }
996
997
998 /*****************************************************************************
999 * edge_close
1000 * this function is called by the tty driver when a port is closed
1001 *****************************************************************************/
1002 static void edge_close (struct usb_serial_port *port, struct file * filp)
1003 {
1004 struct edgeport_serial *edge_serial;
1005 struct edgeport_port *edge_port;
1006 int status;
1007
1008 dbg("%s - port %d", __FUNCTION__, port->number);
1009
1010 edge_serial = usb_get_serial_data(port->serial);
1011 edge_port = usb_get_serial_port_data(port);
1012 if ((edge_serial == NULL) || (edge_port == NULL))
1013 return;
1014
1015 // block until tx is empty
1016 block_until_tx_empty(edge_port);
1017
1018 edge_port->closePending = TRUE;
1019
1020 /* flush and chase */
1021 edge_port->chaseResponsePending = TRUE;
1022
1023 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1024 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1025 if (status == 0) {
1026 // block until chase finished
1027 block_until_chase_response(edge_port);
1028 } else {
1029 edge_port->chaseResponsePending = FALSE;
1030 }
1031
1032 /* close the port */
1033 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1034 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1035
1036 //port->close = TRUE;
1037 edge_port->closePending = FALSE;
1038 edge_port->open = FALSE;
1039 edge_port->openPending = FALSE;
1040
1041 if (edge_port->write_urb) {
1042 usb_kill_urb(edge_port->write_urb);
1043 }
1044
1045 if (edge_port->write_urb) {
1046 /* if this urb had a transfer buffer already (old transfer) free it */
1047 kfree(edge_port->write_urb->transfer_buffer);
1048 usb_free_urb(edge_port->write_urb);
1049 edge_port->write_urb = NULL;
1050 }
1051 kfree(edge_port->txfifo.fifo);
1052 edge_port->txfifo.fifo = NULL;
1053
1054 dbg("%s exited", __FUNCTION__);
1055 }
1056
1057 /*****************************************************************************
1058 * SerialWrite
1059 * this function is called by the tty driver when data should be written to
1060 * the port.
1061 * If successful, we return the number of bytes written, otherwise we return
1062 * a negative error number.
1063 *****************************************************************************/
1064 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1065 {
1066 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1067 struct TxFifo *fifo;
1068 int copySize;
1069 int bytesleft;
1070 int firsthalf;
1071 int secondhalf;
1072 unsigned long flags;
1073
1074 dbg("%s - port %d", __FUNCTION__, port->number);
1075
1076 if (edge_port == NULL)
1077 return -ENODEV;
1078
1079 // get a pointer to the Tx fifo
1080 fifo = &edge_port->txfifo;
1081
1082 spin_lock_irqsave(&edge_port->ep_lock, flags);
1083
1084 // calculate number of bytes to put in fifo
1085 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1086
1087 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__,
1088 port->number, count, edge_port->txCredits - fifo->count, copySize);
1089
1090 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1091 if (copySize == 0) {
1092 dbg("%s - copySize = Zero", __FUNCTION__);
1093 goto finish_write;
1094 }
1095
1096 // queue the data
1097 // since we can never overflow the buffer we do not have to check for full condition
1098
1099 // the copy is done is two parts -- first fill to the end of the buffer
1100 // then copy the reset from the start of the buffer
1101
1102 bytesleft = fifo->size - fifo->head;
1103 firsthalf = min (bytesleft, copySize);
1104 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1105
1106 /* now copy our data */
1107 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1108 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]);
1109
1110 // update the index and size
1111 fifo->head += firsthalf;
1112 fifo->count += firsthalf;
1113
1114 // wrap the index
1115 if (fifo->head == fifo->size) {
1116 fifo->head = 0;
1117 }
1118
1119 secondhalf = copySize-firsthalf;
1120
1121 if (secondhalf) {
1122 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1123 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1124 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1125 // update the index and size
1126 fifo->count += secondhalf;
1127 fifo->head += secondhalf;
1128 // No need to check for wrap since we can not get to end of fifo in this part
1129 }
1130
1131 finish_write:
1132 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1133
1134 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1135
1136 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1137
1138 return copySize;
1139 }
1140
1141
1142 /************************************************************************
1143 *
1144 * send_more_port_data()
1145 *
1146 * This routine attempts to write additional UART transmit data
1147 * to a port over the USB bulk pipe. It is called (1) when new
1148 * data has been written to a port's TxBuffer from higher layers
1149 * (2) when the peripheral sends us additional TxCredits indicating
1150 * that it can accept more Tx data for a given port; and (3) when
1151 * a bulk write completes successfully and we want to see if we
1152 * can transmit more.
1153 *
1154 ************************************************************************/
1155 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1156 {
1157 struct TxFifo *fifo = &edge_port->txfifo;
1158 struct urb *urb;
1159 unsigned char *buffer;
1160 int status;
1161 int count;
1162 int bytesleft;
1163 int firsthalf;
1164 int secondhalf;
1165 unsigned long flags;
1166
1167 dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1168
1169 spin_lock_irqsave(&edge_port->ep_lock, flags);
1170
1171 if (edge_port->write_in_progress ||
1172 !edge_port->open ||
1173 (fifo->count == 0)) {
1174 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1175 goto exit_send;
1176 }
1177
1178 // since the amount of data in the fifo will always fit into the
1179 // edgeport buffer we do not need to check the write length
1180
1181 // Do we have enough credits for this port to make it worthwhile
1182 // to bother queueing a write. If it's too small, say a few bytes,
1183 // it's better to wait for more credits so we can do a larger
1184 // write.
1185 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1186 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1187 goto exit_send;
1188 }
1189
1190 // lock this write
1191 edge_port->write_in_progress = TRUE;
1192
1193 // get a pointer to the write_urb
1194 urb = edge_port->write_urb;
1195
1196 /* make sure transfer buffer is freed */
1197 kfree(urb->transfer_buffer);
1198 urb->transfer_buffer = NULL;
1199
1200 /* build the data header for the buffer and port that we are about to send out */
1201 count = fifo->count;
1202 buffer = kmalloc (count+2, GFP_ATOMIC);
1203 if (buffer == NULL) {
1204 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1205 edge_port->write_in_progress = FALSE;
1206 goto exit_send;
1207 }
1208 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1209 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1210
1211 /* now copy our data */
1212 bytesleft = fifo->size - fifo->tail;
1213 firsthalf = min (bytesleft, count);
1214 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1215 fifo->tail += firsthalf;
1216 fifo->count -= firsthalf;
1217 if (fifo->tail == fifo->size) {
1218 fifo->tail = 0;
1219 }
1220
1221 secondhalf = count-firsthalf;
1222 if (secondhalf) {
1223 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1224 fifo->tail += secondhalf;
1225 fifo->count -= secondhalf;
1226 }
1227
1228 if (count)
1229 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1230
1231 /* fill up the urb with all of our data and submit it */
1232 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1233 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1234 buffer, count+2, edge_bulk_out_data_callback, edge_port);
1235
1236 /* decrement the number of credits we have by the number we just sent */
1237 edge_port->txCredits -= count;
1238 edge_port->icount.tx += count;
1239
1240 urb->dev = edge_serial->serial->dev;
1241 status = usb_submit_urb(urb, GFP_ATOMIC);
1242 if (status) {
1243 /* something went wrong */
1244 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1245 edge_port->write_in_progress = FALSE;
1246
1247 /* revert the credits as something bad happened. */
1248 edge_port->txCredits += count;
1249 edge_port->icount.tx -= count;
1250 }
1251 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1252
1253 exit_send:
1254 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1255 }
1256
1257
1258 /*****************************************************************************
1259 * edge_write_room
1260 * this function is called by the tty driver when it wants to know how many
1261 * bytes of data we can accept for a specific port.
1262 * If successful, we return the amount of room that we have for this port
1263 * (the txCredits),
1264 * Otherwise we return a negative error number.
1265 *****************************************************************************/
1266 static int edge_write_room (struct usb_serial_port *port)
1267 {
1268 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1269 int room;
1270 unsigned long flags;
1271
1272 dbg("%s", __FUNCTION__);
1273
1274 if (edge_port == NULL)
1275 return -ENODEV;
1276 if (edge_port->closePending == TRUE)
1277 return -ENODEV;
1278
1279 dbg("%s - port %d", __FUNCTION__, port->number);
1280
1281 if (!edge_port->open) {
1282 dbg("%s - port not opened", __FUNCTION__);
1283 return -EINVAL;
1284 }
1285
1286 // total of both buffers is still txCredit
1287 spin_lock_irqsave(&edge_port->ep_lock, flags);
1288 room = edge_port->txCredits - edge_port->txfifo.count;
1289 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1290
1291 dbg("%s - returns %d", __FUNCTION__, room);
1292 return room;
1293 }
1294
1295
1296 /*****************************************************************************
1297 * edge_chars_in_buffer
1298 * this function is called by the tty driver when it wants to know how many
1299 * bytes of data we currently have outstanding in the port (data that has
1300 * been written, but hasn't made it out the port yet)
1301 * If successful, we return the number of bytes left to be written in the
1302 * system,
1303 * Otherwise we return a negative error number.
1304 *****************************************************************************/
1305 static int edge_chars_in_buffer (struct usb_serial_port *port)
1306 {
1307 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1308 int num_chars;
1309 unsigned long flags;
1310
1311 dbg("%s", __FUNCTION__);
1312
1313 if (edge_port == NULL)
1314 return -ENODEV;
1315 if (edge_port->closePending == TRUE)
1316 return -ENODEV;
1317
1318 if (!edge_port->open) {
1319 dbg("%s - port not opened", __FUNCTION__);
1320 return -EINVAL;
1321 }
1322
1323 spin_lock_irqsave(&edge_port->ep_lock, flags);
1324 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1325 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1326 if (num_chars) {
1327 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1328 }
1329
1330 return num_chars;
1331 }
1332
1333
1334 /*****************************************************************************
1335 * SerialThrottle
1336 * this function is called by the tty driver when it wants to stop the data
1337 * being read from the port.
1338 *****************************************************************************/
1339 static void edge_throttle (struct usb_serial_port *port)
1340 {
1341 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1342 struct tty_struct *tty;
1343 int status;
1344
1345 dbg("%s - port %d", __FUNCTION__, port->number);
1346
1347 if (edge_port == NULL)
1348 return;
1349
1350 if (!edge_port->open) {
1351 dbg("%s - port not opened", __FUNCTION__);
1352 return;
1353 }
1354
1355 tty = port->tty;
1356 if (!tty) {
1357 dbg ("%s - no tty available", __FUNCTION__);
1358 return;
1359 }
1360
1361 /* if we are implementing XON/XOFF, send the stop character */
1362 if (I_IXOFF(tty)) {
1363 unsigned char stop_char = STOP_CHAR(tty);
1364 status = edge_write (port, &stop_char, 1);
1365 if (status <= 0) {
1366 return;
1367 }
1368 }
1369
1370 /* if we are implementing RTS/CTS, toggle that line */
1371 if (tty->termios->c_cflag & CRTSCTS) {
1372 edge_port->shadowMCR &= ~MCR_RTS;
1373 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1374 if (status != 0) {
1375 return;
1376 }
1377 }
1378
1379 return;
1380 }
1381
1382
1383 /*****************************************************************************
1384 * edge_unthrottle
1385 * this function is called by the tty driver when it wants to resume the data
1386 * being read from the port (called after SerialThrottle is called)
1387 *****************************************************************************/
1388 static void edge_unthrottle (struct usb_serial_port *port)
1389 {
1390 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1391 struct tty_struct *tty;
1392 int status;
1393
1394 dbg("%s - port %d", __FUNCTION__, port->number);
1395
1396 if (edge_port == NULL)
1397 return;
1398
1399 if (!edge_port->open) {
1400 dbg("%s - port not opened", __FUNCTION__);
1401 return;
1402 }
1403
1404 tty = port->tty;
1405 if (!tty) {
1406 dbg ("%s - no tty available", __FUNCTION__);
1407 return;
1408 }
1409
1410 /* if we are implementing XON/XOFF, send the start character */
1411 if (I_IXOFF(tty)) {
1412 unsigned char start_char = START_CHAR(tty);
1413 status = edge_write (port, &start_char, 1);
1414 if (status <= 0) {
1415 return;
1416 }
1417 }
1418
1419 /* if we are implementing RTS/CTS, toggle that line */
1420 if (tty->termios->c_cflag & CRTSCTS) {
1421 edge_port->shadowMCR |= MCR_RTS;
1422 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1423 if (status != 0) {
1424 return;
1425 }
1426 }
1427
1428 return;
1429 }
1430
1431
1432 /*****************************************************************************
1433 * SerialSetTermios
1434 * this function is called by the tty driver when it wants to change the termios structure
1435 *****************************************************************************/
1436 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1437 {
1438 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1439 struct tty_struct *tty = port->tty;
1440 unsigned int cflag;
1441
1442 if (!port->tty || !port->tty->termios) {
1443 dbg ("%s - no tty or termios", __FUNCTION__);
1444 return;
1445 }
1446
1447 cflag = tty->termios->c_cflag;
1448 /* check that they really want us to change something */
1449 if (old_termios) {
1450 if (cflag == old_termios->c_cflag &&
1451 tty->termios->c_iflag == old_termios->c_iflag) {
1452 dbg("%s - nothing to change", __FUNCTION__);
1453 return;
1454 }
1455 }
1456
1457 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1458 tty->termios->c_cflag, tty->termios->c_iflag);
1459 if (old_termios) {
1460 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1461 old_termios->c_cflag, old_termios->c_iflag);
1462 }
1463
1464 dbg("%s - port %d", __FUNCTION__, port->number);
1465
1466 if (edge_port == NULL)
1467 return;
1468
1469 if (!edge_port->open) {
1470 dbg("%s - port not opened", __FUNCTION__);
1471 return;
1472 }
1473
1474 /* change the port settings to the new ones specified */
1475 change_port_settings (edge_port, old_termios);
1476
1477 return;
1478 }
1479
1480
1481 /*****************************************************************************
1482 * get_lsr_info - get line status register info
1483 *
1484 * Purpose: Let user call ioctl() to get info when the UART physically
1485 * is emptied. On bus types like RS485, the transmitter must
1486 * release the bus after transmitting. This must be done when
1487 * the transmit shift register is empty, not be done when the
1488 * transmit holding register is empty. This functionality
1489 * allows an RS485 driver to be written in user space.
1490 *****************************************************************************/
1491 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1492 {
1493 unsigned int result = 0;
1494 unsigned long flags;
1495
1496 spin_lock_irqsave(&edge_port->ep_lock, flags);
1497 if (edge_port->maxTxCredits == edge_port->txCredits &&
1498 edge_port->txfifo.count == 0) {
1499 dbg("%s -- Empty", __FUNCTION__);
1500 result = TIOCSER_TEMT;
1501 }
1502 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1503
1504 if (copy_to_user(value, &result, sizeof(int)))
1505 return -EFAULT;
1506 return 0;
1507 }
1508
1509 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1510 {
1511 unsigned int result = 0;
1512 struct tty_struct *tty = edge_port->port->tty;
1513
1514 if (!tty)
1515 return -ENOIOCTLCMD;
1516
1517 result = tty->read_cnt;
1518
1519 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result);
1520 if (copy_to_user(value, &result, sizeof(int)))
1521 return -EFAULT;
1522 //return 0;
1523 return -ENOIOCTLCMD;
1524 }
1525
1526 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1527 {
1528 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1529 unsigned int mcr;
1530
1531 dbg("%s - port %d", __FUNCTION__, port->number);
1532
1533 mcr = edge_port->shadowMCR;
1534 if (set & TIOCM_RTS)
1535 mcr |= MCR_RTS;
1536 if (set & TIOCM_DTR)
1537 mcr |= MCR_DTR;
1538 if (set & TIOCM_LOOP)
1539 mcr |= MCR_LOOPBACK;
1540
1541 if (clear & TIOCM_RTS)
1542 mcr &= ~MCR_RTS;
1543 if (clear & TIOCM_DTR)
1544 mcr &= ~MCR_DTR;
1545 if (clear & TIOCM_LOOP)
1546 mcr &= ~MCR_LOOPBACK;
1547
1548 edge_port->shadowMCR = mcr;
1549
1550 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1551
1552 return 0;
1553 }
1554
1555 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1556 {
1557 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1558 unsigned int result = 0;
1559 unsigned int msr;
1560 unsigned int mcr;
1561
1562 dbg("%s - port %d", __FUNCTION__, port->number);
1563
1564 msr = edge_port->shadowMSR;
1565 mcr = edge_port->shadowMCR;
1566 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1567 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1568 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1569 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1570 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1571 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1572
1573
1574 dbg("%s -- %x", __FUNCTION__, result);
1575
1576 return result;
1577 }
1578
1579 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1580 {
1581 struct serial_struct tmp;
1582
1583 if (!retinfo)
1584 return -EFAULT;
1585
1586 memset(&tmp, 0, sizeof(tmp));
1587
1588 tmp.type = PORT_16550A;
1589 tmp.line = edge_port->port->serial->minor;
1590 tmp.port = edge_port->port->number;
1591 tmp.irq = 0;
1592 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1593 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1594 tmp.baud_base = 9600;
1595 tmp.close_delay = 5*HZ;
1596 tmp.closing_wait = 30*HZ;
1597 // tmp.custom_divisor = state->custom_divisor;
1598 // tmp.hub6 = state->hub6;
1599 // tmp.io_type = state->io_type;
1600
1601 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1602 return -EFAULT;
1603 return 0;
1604 }
1605
1606
1607
1608 /*****************************************************************************
1609 * SerialIoctl
1610 * this function handles any ioctl calls to the driver
1611 *****************************************************************************/
1612 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1613 {
1614 DEFINE_WAIT(wait);
1615 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1616 struct async_icount cnow;
1617 struct async_icount cprev;
1618 struct serial_icounter_struct icount;
1619
1620 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1621
1622 switch (cmd) {
1623 // return number of bytes available
1624 case TIOCINQ:
1625 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1626 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1627 break;
1628
1629 case TIOCSERGETLSR:
1630 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1631 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1632 return 0;
1633
1634 case TIOCGSERIAL:
1635 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1636 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1637
1638 case TIOCSSERIAL:
1639 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1640 break;
1641
1642 case TIOCMIWAIT:
1643 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1644 cprev = edge_port->icount;
1645 while (1) {
1646 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1647 schedule();
1648 finish_wait(&edge_port->delta_msr_wait, &wait);
1649 /* see if a signal did it */
1650 if (signal_pending(current))
1651 return -ERESTARTSYS;
1652 cnow = edge_port->icount;
1653 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1654 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1655 return -EIO; /* no change => error */
1656 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1657 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1658 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1659 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1660 return 0;
1661 }
1662 cprev = cnow;
1663 }
1664 /* NOTREACHED */
1665 break;
1666
1667 case TIOCGICOUNT:
1668 cnow = edge_port->icount;
1669 memset(&icount, 0, sizeof(icount));
1670 icount.cts = cnow.cts;
1671 icount.dsr = cnow.dsr;
1672 icount.rng = cnow.rng;
1673 icount.dcd = cnow.dcd;
1674 icount.rx = cnow.rx;
1675 icount.tx = cnow.tx;
1676 icount.frame = cnow.frame;
1677 icount.overrun = cnow.overrun;
1678 icount.parity = cnow.parity;
1679 icount.brk = cnow.brk;
1680 icount.buf_overrun = cnow.buf_overrun;
1681
1682 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx );
1683 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1684 return -EFAULT;
1685 return 0;
1686 }
1687
1688 return -ENOIOCTLCMD;
1689 }
1690
1691
1692 /*****************************************************************************
1693 * SerialBreak
1694 * this function sends a break to the port
1695 *****************************************************************************/
1696 static void edge_break (struct usb_serial_port *port, int break_state)
1697 {
1698 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1699 int status;
1700
1701 /* flush and chase */
1702 edge_port->chaseResponsePending = TRUE;
1703
1704 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1705 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1706 if (status == 0) {
1707 // block until chase finished
1708 block_until_chase_response(edge_port);
1709 } else {
1710 edge_port->chaseResponsePending = FALSE;
1711 }
1712
1713 if (break_state == -1) {
1714 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1715 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1716 } else {
1717 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1718 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1719 }
1720 if (status) {
1721 dbg("%s - error sending break set/clear command.", __FUNCTION__);
1722 }
1723
1724 return;
1725 }
1726
1727
1728 /*****************************************************************************
1729 * process_rcvd_data
1730 * this function handles the data received on the bulk in pipe.
1731 *****************************************************************************/
1732 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1733 {
1734 struct usb_serial_port *port;
1735 struct edgeport_port *edge_port;
1736 struct tty_struct *tty;
1737 __u16 lastBufferLength;
1738 __u16 rxLen;
1739
1740 dbg("%s", __FUNCTION__);
1741
1742 lastBufferLength = bufferLength + 1;
1743
1744 while (bufferLength > 0) {
1745 /* failsafe incase we get a message that we don't understand */
1746 if (lastBufferLength == bufferLength) {
1747 dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1748 break;
1749 }
1750 lastBufferLength = bufferLength;
1751
1752 switch (edge_serial->rxState) {
1753 case EXPECT_HDR1:
1754 edge_serial->rxHeader1 = *buffer;
1755 ++buffer;
1756 --bufferLength;
1757
1758 if (bufferLength == 0) {
1759 edge_serial->rxState = EXPECT_HDR2;
1760 break;
1761 }
1762 /* otherwise, drop on through */
1763
1764 case EXPECT_HDR2:
1765 edge_serial->rxHeader2 = *buffer;
1766 ++buffer;
1767 --bufferLength;
1768
1769 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1770
1771 // Process depending on whether this header is
1772 // data or status
1773
1774 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1775 // Decode this status header and goto EXPECT_HDR1 (if we
1776 // can process the status with only 2 bytes), or goto
1777 // EXPECT_HDR3 to get the third byte.
1778
1779 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1780 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
1781
1782 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
1783 // This status needs additional bytes. Save what we have
1784 // and then wait for more data.
1785 edge_serial->rxStatusParam = edge_serial->rxHeader2;
1786
1787 edge_serial->rxState = EXPECT_HDR3;
1788 break;
1789 }
1790
1791 // We have all the header bytes, process the status now
1792 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
1793 edge_serial->rxState = EXPECT_HDR1;
1794 break;
1795 } else {
1796 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1797 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
1798
1799 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
1800
1801 //ASSERT( DevExt->RxPort < DevExt->NumPorts );
1802 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
1803
1804 if (bufferLength == 0 ) {
1805 edge_serial->rxState = EXPECT_DATA;
1806 break;
1807 }
1808 // Else, drop through
1809 }
1810
1811 case EXPECT_DATA: // Expect data
1812
1813 if (bufferLength < edge_serial->rxBytesRemaining) {
1814 rxLen = bufferLength;
1815 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer
1816 } else {
1817 // BufLen >= RxBytesRemaining
1818 rxLen = edge_serial->rxBytesRemaining;
1819 edge_serial->rxState = EXPECT_HDR1; // Start another header next time
1820 }
1821
1822 bufferLength -= rxLen;
1823 edge_serial->rxBytesRemaining -= rxLen;
1824
1825 /* spit this data back into the tty driver if this port is open */
1826 if (rxLen) {
1827 port = edge_serial->serial->port[edge_serial->rxPort];
1828 edge_port = usb_get_serial_port_data(port);
1829 if (edge_port->open) {
1830 tty = edge_port->port->tty;
1831 if (tty) {
1832 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
1833 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1834 }
1835 edge_port->icount.rx += rxLen;
1836 }
1837 buffer += rxLen;
1838 }
1839
1840 break;
1841
1842 case EXPECT_HDR3: // Expect 3rd byte of status header
1843 edge_serial->rxHeader3 = *buffer;
1844 ++buffer;
1845 --bufferLength;
1846
1847 // We have all the header bytes, process the status now
1848 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
1849 edge_serial->rxState = EXPECT_HDR1;
1850 break;
1851
1852 }
1853 }
1854 }
1855
1856
1857 /*****************************************************************************
1858 * process_rcvd_status
1859 * this function handles the any status messages received on the bulk in pipe.
1860 *****************************************************************************/
1861 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
1862 {
1863 struct usb_serial_port *port;
1864 struct edgeport_port *edge_port;
1865 __u8 code = edge_serial->rxStatusCode;
1866
1867 /* switch the port pointer to the one being currently talked about */
1868 port = edge_serial->serial->port[edge_serial->rxPort];
1869 edge_port = usb_get_serial_port_data(port);
1870 if (edge_port == NULL) {
1871 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
1872 return;
1873 }
1874
1875 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
1876
1877 if (code == IOSP_EXT_STATUS) {
1878 switch (byte2) {
1879 case IOSP_EXT_STATUS_CHASE_RSP:
1880 // we want to do EXT status regardless of port open/closed
1881 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
1882 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
1883 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
1884 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
1885 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
1886 // like wait longer in block_until_chase_response, but for now we don't.
1887 edge_port->chaseResponsePending = FALSE;
1888 wake_up (&edge_port->wait_chase);
1889 return;
1890
1891 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1892 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
1893 //Port->RxCheckRsp = TRUE;
1894 return;
1895 }
1896 }
1897
1898 if (code == IOSP_STATUS_OPEN_RSP) {
1899 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1900 edge_port->maxTxCredits = edge_port->txCredits;
1901 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
1902 handle_new_msr (edge_port, byte2);
1903
1904 /* send the current line settings to the port so we are in sync with any further termios calls */
1905 if (edge_port->port->tty)
1906 change_port_settings (edge_port, edge_port->port->tty->termios);
1907
1908 /* we have completed the open */
1909 edge_port->openPending = FALSE;
1910 edge_port->open = TRUE;
1911 wake_up(&edge_port->wait_open);
1912 return;
1913 }
1914
1915 // If port is closed, silently discard all rcvd status. We can
1916 // have cases where buffered status is received AFTER the close
1917 // port command is sent to the Edgeport.
1918 if ((!edge_port->open ) || (edge_port->closePending)) {
1919 return;
1920 }
1921
1922 switch (code) {
1923 // Not currently sent by Edgeport
1924 case IOSP_STATUS_LSR:
1925 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
1926 handle_new_lsr (edge_port, FALSE, byte2, 0);
1927 break;
1928
1929 case IOSP_STATUS_LSR_DATA:
1930 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
1931 // byte2 is LSR Register
1932 // byte3 is broken data byte
1933 handle_new_lsr (edge_port, TRUE, byte2, byte3);
1934 break;
1935 //
1936 // case IOSP_EXT_4_STATUS:
1937 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
1938 // break;
1939 //
1940 case IOSP_STATUS_MSR:
1941 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
1942
1943 // Process this new modem status and generate appropriate
1944 // events, etc, based on the new status. This routine
1945 // also saves the MSR in Port->ShadowMsr.
1946 handle_new_msr(edge_port, byte2);
1947 break;
1948
1949 default:
1950 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
1951 break;
1952 }
1953
1954 return;
1955 }
1956
1957
1958 /*****************************************************************************
1959 * edge_tty_recv
1960 * this function passes data on to the tty flip buffer
1961 *****************************************************************************/
1962 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
1963 {
1964 int cnt;
1965
1966 do {
1967 cnt = tty_buffer_request_room(tty, length);
1968 if (cnt < length) {
1969 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1970 __FUNCTION__, length - cnt);
1971 if(cnt == 0)
1972 break;
1973 }
1974 tty_insert_flip_string(tty, data, cnt);
1975 data += cnt;
1976 length -= cnt;
1977 } while (length > 0);
1978
1979 tty_flip_buffer_push(tty);
1980 }
1981
1982
1983 /*****************************************************************************
1984 * handle_new_msr
1985 * this function handles any change to the msr register for a port.
1986 *****************************************************************************/
1987 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1988 {
1989 struct async_icount *icount;
1990
1991 dbg("%s %02x", __FUNCTION__, newMsr);
1992
1993 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1994 icount = &edge_port->icount;
1995
1996 /* update input line counters */
1997 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
1998 icount->cts++;
1999 }
2000 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2001 icount->dsr++;
2002 }
2003 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2004 icount->dcd++;
2005 }
2006 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2007 icount->rng++;
2008 }
2009 wake_up_interruptible(&edge_port->delta_msr_wait);
2010 }
2011
2012 /* Save the new modem status */
2013 edge_port->shadowMSR = newMsr & 0xf0;
2014
2015 return;
2016 }
2017
2018
2019 /*****************************************************************************
2020 * handle_new_lsr
2021 * this function handles any change to the lsr register for a port.
2022 *****************************************************************************/
2023 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2024 {
2025 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2026 struct async_icount *icount;
2027
2028 dbg("%s - %02x", __FUNCTION__, newLsr);
2029
2030 edge_port->shadowLSR = lsr;
2031
2032 if (newLsr & LSR_BREAK) {
2033 //
2034 // Parity and Framing errors only count if they
2035 // occur exclusive of a break being
2036 // received.
2037 //
2038 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2039 }
2040
2041 /* Place LSR data byte into Rx buffer */
2042 if (lsrData && edge_port->port->tty)
2043 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2044
2045 /* update input line counters */
2046 icount = &edge_port->icount;
2047 if (newLsr & LSR_BREAK) {
2048 icount->brk++;
2049 }
2050 if (newLsr & LSR_OVER_ERR) {
2051 icount->overrun++;
2052 }
2053 if (newLsr & LSR_PAR_ERR) {
2054 icount->parity++;
2055 }
2056 if (newLsr & LSR_FRM_ERR) {
2057 icount->frame++;
2058 }
2059
2060 return;
2061 }
2062
2063
2064 /****************************************************************************
2065 * sram_write
2066 * writes a number of bytes to the Edgeport device's sram starting at the
2067 * given address.
2068 * If successful returns the number of bytes written, otherwise it returns
2069 * a negative error number of the problem.
2070 ****************************************************************************/
2071 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2072 {
2073 int result;
2074 __u16 current_length;
2075 unsigned char *transfer_buffer;
2076
2077 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2078
2079 transfer_buffer = kmalloc (64, GFP_KERNEL);
2080 if (!transfer_buffer) {
2081 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2082 return -ENOMEM;
2083 }
2084
2085 /* need to split these writes up into 64 byte chunks */
2086 result = 0;
2087 while (length > 0) {
2088 if (length > 64) {
2089 current_length = 64;
2090 } else {
2091 current_length = length;
2092 }
2093 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2094 memcpy (transfer_buffer, data, current_length);
2095 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2096 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2097 if (result < 0)
2098 break;
2099 length -= current_length;
2100 addr += current_length;
2101 data += current_length;
2102 }
2103
2104 kfree (transfer_buffer);
2105 return result;
2106 }
2107
2108
2109 /****************************************************************************
2110 * rom_write
2111 * writes a number of bytes to the Edgeport device's ROM starting at the
2112 * given address.
2113 * If successful returns the number of bytes written, otherwise it returns
2114 * a negative error number of the problem.
2115 ****************************************************************************/
2116 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2117 {
2118 int result;
2119 __u16 current_length;
2120 unsigned char *transfer_buffer;
2121
2122 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2123
2124 transfer_buffer = kmalloc (64, GFP_KERNEL);
2125 if (!transfer_buffer) {
2126 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2127 return -ENOMEM;
2128 }
2129
2130 /* need to split these writes up into 64 byte chunks */
2131 result = 0;
2132 while (length > 0) {
2133 if (length > 64) {
2134 current_length = 64;
2135 } else {
2136 current_length = length;
2137 }
2138 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2139 memcpy (transfer_buffer, data, current_length);
2140 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2141 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2142 if (result < 0)
2143 break;
2144 length -= current_length;
2145 addr += current_length;
2146 data += current_length;
2147 }
2148
2149 kfree (transfer_buffer);
2150 return result;
2151 }
2152
2153
2154 /****************************************************************************
2155 * rom_read
2156 * reads a number of bytes from the Edgeport device starting at the given
2157 * address.
2158 * If successful returns the number of bytes read, otherwise it returns
2159 * a negative error number of the problem.
2160 ****************************************************************************/
2161 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2162 {
2163 int result;
2164 __u16 current_length;
2165 unsigned char *transfer_buffer;
2166
2167 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2168
2169 transfer_buffer = kmalloc (64, GFP_KERNEL);
2170 if (!transfer_buffer) {
2171 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2172 return -ENOMEM;
2173 }
2174
2175 /* need to split these reads up into 64 byte chunks */
2176 result = 0;
2177 while (length > 0) {
2178 if (length > 64) {
2179 current_length = 64;
2180 } else {
2181 current_length = length;
2182 }
2183 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2184 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2185 0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2186 if (result < 0)
2187 break;
2188 memcpy (data, transfer_buffer, current_length);
2189 length -= current_length;
2190 addr += current_length;
2191 data += current_length;
2192 }
2193
2194 kfree (transfer_buffer);
2195 return result;
2196 }
2197
2198
2199 /****************************************************************************
2200 * send_iosp_ext_cmd
2201 * Is used to send a IOSP message to the Edgeport device
2202 ****************************************************************************/
2203 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2204 {
2205 unsigned char *buffer;
2206 unsigned char *currentCommand;
2207 int length = 0;
2208 int status = 0;
2209
2210 dbg("%s - %d, %d", __FUNCTION__, command, param);
2211
2212 buffer = kmalloc (10, GFP_ATOMIC);
2213 if (!buffer) {
2214 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2215 return -ENOMEM;
2216 }
2217
2218 currentCommand = buffer;
2219
2220 MAKE_CMD_EXT_CMD (&currentCommand, &length,
2221 edge_port->port->number - edge_port->port->serial->minor,
2222 command, param);
2223
2224 status = write_cmd_usb (edge_port, buffer, length);
2225 if (status) {
2226 /* something bad happened, let's free up the memory */
2227 kfree(buffer);
2228 }
2229
2230 return status;
2231 }
2232
2233
2234 /*****************************************************************************
2235 * write_cmd_usb
2236 * this function writes the given buffer out to the bulk write endpoint.
2237 *****************************************************************************/
2238 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2239 {
2240 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2241 int status = 0;
2242 struct urb *urb;
2243 int timeout;
2244
2245 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2246
2247 /* Allocate our next urb */
2248 urb = usb_alloc_urb (0, GFP_ATOMIC);
2249 if (!urb)
2250 return -ENOMEM;
2251
2252 CmdUrbs++;
2253 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
2254
2255 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2256 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2257 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2258
2259 edge_port->commandPending = TRUE;
2260 status = usb_submit_urb(urb, GFP_ATOMIC);
2261
2262 if (status) {
2263 /* something went wrong */
2264 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2265 usb_kill_urb(urb);
2266 usb_free_urb(urb);
2267 CmdUrbs--;
2268 return status;
2269 }
2270
2271 // wait for command to finish
2272 timeout = COMMAND_TIMEOUT;
2273 #if 0
2274 wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE));
2275
2276 if (edge_port->commandPending == TRUE) {
2277 /* command timed out */
2278 dbg("%s - command timed out", __FUNCTION__);
2279 status = -EINVAL;
2280 }
2281 #endif
2282 return status;
2283 }
2284
2285
2286 /*****************************************************************************
2287 * send_cmd_write_baud_rate
2288 * this function sends the proper command to change the baud rate of the
2289 * specified port.
2290 *****************************************************************************/
2291 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2292 {
2293 unsigned char *cmdBuffer;
2294 unsigned char *currCmd;
2295 int cmdLen = 0;
2296 int divisor;
2297 int status;
2298 unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2299
2300 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2301
2302 status = calc_baud_rate_divisor (baudRate, &divisor);
2303 if (status) {
2304 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2305 return status;
2306 }
2307
2308 // Alloc memory for the string of commands.
2309 cmdBuffer = kmalloc (0x100, GFP_ATOMIC);
2310 if (!cmdBuffer) {
2311 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2312 return -ENOMEM;
2313 }
2314 currCmd = cmdBuffer;
2315
2316 // Enable access to divisor latch
2317 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2318
2319 // Write the divisor itself
2320 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2321 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2322
2323 // Restore original value to disable access to divisor latch
2324 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2325
2326 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2327 if (status) {
2328 /* something bad happened, let's free up the memory */
2329 kfree (cmdBuffer);
2330 }
2331
2332 return status;
2333 }
2334
2335
2336 /*****************************************************************************
2337 * calc_baud_rate_divisor
2338 * this function calculates the proper baud rate divisor for the specified
2339 * baud rate.
2340 *****************************************************************************/
2341 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2342 {
2343 int i;
2344 __u16 custom;
2345
2346
2347 dbg("%s - %d", __FUNCTION__, baudrate);
2348
2349 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2350 if ( divisor_table[i].BaudRate == baudrate ) {
2351 *divisor = divisor_table[i].Divisor;
2352 return 0;
2353 }
2354 }
2355
2356 // We have tried all of the standard baud rates
2357 // lets try to calculate the divisor for this baud rate
2358 // Make sure the baud rate is reasonable
2359 if (baudrate > 50 && baudrate < 230400) {
2360 // get divisor
2361 custom = (__u16)((230400L + baudrate/2) / baudrate);
2362
2363 *divisor = custom;
2364
2365 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2366 return 0;
2367 }
2368
2369 return -1;
2370 }
2371
2372
2373 /*****************************************************************************
2374 * send_cmd_write_uart_register
2375 * this function builds up a uart register message and sends to to the device.
2376 *****************************************************************************/
2377 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2378 {
2379 unsigned char *cmdBuffer;
2380 unsigned char *currCmd;
2381 unsigned long cmdLen = 0;
2382 int status;
2383
2384 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2385
2386 // Alloc memory for the string of commands.
2387 cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2388 if (cmdBuffer == NULL ) {
2389 return -ENOMEM;
2390 }
2391
2392 currCmd = cmdBuffer;
2393
2394 // Build a cmd in the buffer to write the given register
2395 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2396 edge_port->port->number - edge_port->port->serial->minor,
2397 regNum, regValue);
2398
2399 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2400 if (status) {
2401 /* something bad happened, let's free up the memory */
2402 kfree (cmdBuffer);
2403 }
2404
2405 return status;
2406 }
2407
2408
2409 /*****************************************************************************
2410 * change_port_settings
2411 * This routine is called to set the UART on the device to match the specified
2412 * new settings.
2413 *****************************************************************************/
2414 #ifndef CMSPAR
2415 #define CMSPAR 0
2416 #endif
2417 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios)
2418 {
2419 struct tty_struct *tty;
2420 int baud;
2421 unsigned cflag;
2422 __u8 mask = 0xff;
2423 __u8 lData;
2424 __u8 lParity;
2425 __u8 lStop;
2426 __u8 rxFlow;
2427 __u8 txFlow;
2428 int status;
2429
2430 dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2431
2432 if ((!edge_port->open) &&
2433 (!edge_port->openPending)) {
2434 dbg("%s - port not opened", __FUNCTION__);
2435 return;
2436 }
2437
2438 tty = edge_port->port->tty;
2439 if ((!tty) ||
2440 (!tty->termios)) {
2441 dbg("%s - no tty structures", __FUNCTION__);
2442 return;
2443 }
2444
2445 cflag = tty->termios->c_cflag;
2446
2447 switch (cflag & CSIZE) {
2448 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break;
2449 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break;
2450 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break;
2451 default:
2452 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break;
2453 }
2454
2455 lParity = LCR_PAR_NONE;
2456 if (cflag & PARENB) {
2457 if (cflag & CMSPAR) {
2458 if (cflag & PARODD) {
2459 lParity = LCR_PAR_MARK;
2460 dbg("%s - parity = mark", __FUNCTION__);
2461 } else {
2462 lParity = LCR_PAR_SPACE;
2463 dbg("%s - parity = space", __FUNCTION__);
2464 }
2465 } else if (cflag & PARODD) {
2466 lParity = LCR_PAR_ODD;
2467 dbg("%s - parity = odd", __FUNCTION__);
2468 } else {
2469 lParity = LCR_PAR_EVEN;
2470 dbg("%s - parity = even", __FUNCTION__);
2471 }
2472 } else {
2473 dbg("%s - parity = none", __FUNCTION__);
2474 }
2475
2476 if (cflag & CSTOPB) {
2477 lStop = LCR_STOP_2;
2478 dbg("%s - stop bits = 2", __FUNCTION__);
2479 } else {
2480 lStop = LCR_STOP_1;
2481 dbg("%s - stop bits = 1", __FUNCTION__);
2482 }
2483
2484 /* figure out the flow control settings */
2485 rxFlow = txFlow = 0x00;
2486 if (cflag & CRTSCTS) {
2487 rxFlow |= IOSP_RX_FLOW_RTS;
2488 txFlow |= IOSP_TX_FLOW_CTS;
2489 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2490 } else {
2491 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2492 }
2493
2494 /* if we are implementing XON/XOFF, set the start and stop character in the device */
2495 if (I_IXOFF(tty) || I_IXON(tty)) {
2496 unsigned char stop_char = STOP_CHAR(tty);
2497 unsigned char start_char = START_CHAR(tty);
2498
2499 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2500 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2501
2502 /* if we are implementing INBOUND XON/XOFF */
2503 if (I_IXOFF(tty)) {
2504 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2505 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2506 } else {
2507 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2508 }
2509
2510 /* if we are implementing OUTBOUND XON/XOFF */
2511 if (I_IXON(tty)) {
2512 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2513 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2514 } else {
2515 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2516 }
2517 }
2518
2519 /* Set flow control to the configured value */
2520 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2521 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2522
2523
2524 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2525 edge_port->shadowLCR |= (lData | lParity | lStop);
2526
2527 edge_port->validDataMask = mask;
2528
2529 /* Send the updated LCR value to the EdgePort */
2530 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2531 if (status != 0) {
2532 return;
2533 }
2534
2535 /* set up the MCR register and send it to the EdgePort */
2536 edge_port->shadowMCR = MCR_MASTER_IE;
2537 if (cflag & CBAUD) {
2538 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2539 }
2540 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2541 if (status != 0) {
2542 return;
2543 }
2544
2545 /* Determine divisor based on baud rate */
2546 baud = tty_get_baud_rate(tty);
2547 if (!baud) {
2548 /* pick a default, any default... */
2549 baud = 9600;
2550 }
2551
2552 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2553 status = send_cmd_write_baud_rate (edge_port, baud);
2554
2555 return;
2556 }
2557
2558
2559 /****************************************************************************
2560 * unicode_to_ascii
2561 * Turns a string from Unicode into ASCII.
2562 * Doesn't do a good job with any characters that are outside the normal
2563 * ASCII range, but it's only for debugging...
2564 * NOTE: expects the unicode in LE format
2565 ****************************************************************************/
2566 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size)
2567 {
2568 int i;
2569
2570 if (buflen <= 0) /* never happens, but... */
2571 return;
2572 --buflen; /* space for nul */
2573
2574 for (i = 0; i < unicode_size; i++) {
2575 if (i >= buflen)
2576 break;
2577 string[i] = (char)(le16_to_cpu(unicode[i]));
2578 }
2579 string[i] = 0x00;
2580 }
2581
2582
2583 /****************************************************************************
2584 * get_manufacturing_desc
2585 * reads in the manufacturing descriptor and stores it into the serial
2586 * structure.
2587 ****************************************************************************/
2588 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2589 {
2590 int response;
2591
2592 dbg("getting manufacturer descriptor");
2593
2594 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2595 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2596 (__u8 *)(&edge_serial->manuf_descriptor));
2597
2598 if (response < 1) {
2599 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2600 } else {
2601 char string[30];
2602 dbg("**Manufacturer Descriptor");
2603 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize);
2604 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize);
2605 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev);
2606 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev);
2607 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts);
2608 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2609 unicode_to_ascii(string, sizeof(string),
2610 edge_serial->manuf_descriptor.SerialNumber,
2611 edge_serial->manuf_descriptor.SerNumLength/2);
2612 dbg(" SerialNumber: %s", string);
2613 unicode_to_ascii(string, sizeof(string),
2614 edge_serial->manuf_descriptor.AssemblyNumber,
2615 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2616 dbg(" AssemblyNumber: %s", string);
2617 unicode_to_ascii(string, sizeof(string),
2618 edge_serial->manuf_descriptor.OemAssyNumber,
2619 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2620 dbg(" OemAssyNumber: %s", string);
2621 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType);
2622 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid);
2623 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig);
2624 }
2625 }
2626
2627
2628 /****************************************************************************
2629 * get_boot_desc
2630 * reads in the bootloader descriptor and stores it into the serial
2631 * structure.
2632 ****************************************************************************/
2633 static void get_boot_desc (struct edgeport_serial *edge_serial)
2634 {
2635 int response;
2636
2637 dbg("getting boot descriptor");
2638
2639 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2640 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2641 (__u8 *)(&edge_serial->boot_descriptor));
2642
2643 if (response < 1) {
2644 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2645 } else {
2646 dbg("**Boot Descriptor:");
2647 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2648 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion);
2649 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion);
2650 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2651 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2652 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0);
2653 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1);
2654 }
2655 }
2656
2657
2658 /****************************************************************************
2659 * load_application_firmware
2660 * This is called to load the application firmware to the device
2661 ****************************************************************************/
2662 static void load_application_firmware (struct edgeport_serial *edge_serial)
2663 {
2664 struct edge_firmware_image_record *record;
2665 unsigned char *firmware;
2666 unsigned char *FirmwareImage;
2667 int ImageSize;
2668 int response;
2669
2670
2671 switch (edge_serial->product_info.iDownloadFile) {
2672 case EDGE_DOWNLOAD_FILE_I930:
2673 dbg("downloading firmware version (930) %d.%d.%d",
2674 OperationalCodeImageVersion_GEN1.MajorVersion,
2675 OperationalCodeImageVersion_GEN1.MinorVersion,
2676 OperationalCodeImageVersion_GEN1.BuildNumber);
2677 firmware = &OperationalCodeImage_GEN1[0];
2678 FirmwareImage = &OperationalCodeImage_GEN1[0];
2679 ImageSize = sizeof(OperationalCodeImage_GEN1);
2680 break;
2681
2682 case EDGE_DOWNLOAD_FILE_80251:
2683 dbg("downloading firmware version (80251) %d.%d.%d",
2684 OperationalCodeImageVersion_GEN2.MajorVersion,
2685 OperationalCodeImageVersion_GEN2.MinorVersion,
2686 OperationalCodeImageVersion_GEN2.BuildNumber);
2687 firmware = &OperationalCodeImage_GEN2[0];
2688 FirmwareImage = &OperationalCodeImage_GEN2[0];
2689 ImageSize = sizeof(OperationalCodeImage_GEN2);
2690 break;
2691
2692 case EDGE_DOWNLOAD_FILE_NONE:
2693 dbg ("No download file specified, skipping download\n");
2694 return;
2695
2696 default:
2697 return;
2698 }
2699
2700
2701 for (;;) {
2702 record = (struct edge_firmware_image_record *)firmware;
2703 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2704 if (response < 0) {
2705 dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
2706 break;
2707 }
2708 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2709 if (firmware >= &FirmwareImage[ImageSize]) {
2710 break;
2711 }
2712 }
2713
2714 dbg("sending exec_dl_code");
2715 response = usb_control_msg (edge_serial->serial->dev,
2716 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2717 USB_REQUEST_ION_EXEC_DL_CODE,
2718 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2719
2720 return;
2721 }
2722
2723
2724 /****************************************************************************
2725 * edge_startup
2726 ****************************************************************************/
2727 static int edge_startup (struct usb_serial *serial)
2728 {
2729 struct edgeport_serial *edge_serial;
2730 struct edgeport_port *edge_port;
2731 struct usb_device *dev;
2732 int i, j;
2733
2734 dev = serial->dev;
2735
2736 /* create our private serial structure */
2737 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2738 if (edge_serial == NULL) {
2739 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2740 return -ENOMEM;
2741 }
2742 spin_lock_init(&edge_serial->es_lock);
2743 edge_serial->serial = serial;
2744 usb_set_serial_data(serial, edge_serial);
2745
2746 /* get the name for the device from the device */
2747 i = get_string(dev, dev->descriptor.iManufacturer,
2748 &edge_serial->name[0], MAX_NAME_LEN+1);
2749 edge_serial->name[i++] = ' ';
2750 get_string(dev, dev->descriptor.iProduct,
2751 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2752
2753 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2754
2755 /* get the manufacturing descriptor for this device */
2756 get_manufacturing_desc (edge_serial);
2757
2758 /* get the boot descriptor */
2759 get_boot_desc (edge_serial);
2760
2761 get_product_info(edge_serial);
2762
2763 /* set the number of ports from the manufacturing description */
2764 /* serial->num_ports = serial->product_info.NumPorts; */
2765 if (edge_serial->product_info.NumPorts != serial->num_ports) {
2766 warn("%s - Device Reported %d serial ports vs core "
2767 "thinking we have %d ports, email greg@kroah.com this info.",
2768 __FUNCTION__, edge_serial->product_info.NumPorts,
2769 serial->num_ports);
2770 }
2771
2772 dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2773
2774 /* now load the application firmware into this device */
2775 load_application_firmware (edge_serial);
2776
2777 dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
2778
2779 /* Check current Edgeport EEPROM and update if necessary */
2780 update_edgeport_E2PROM (edge_serial);
2781
2782 dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
2783
2784 /* set the configuration to use #1 */
2785 // dbg("set_configuration 1");
2786 // usb_set_configuration (dev, 1);
2787
2788 /* we set up the pointers to the endpoints in the edge_open function,
2789 * as the structures aren't created yet. */
2790
2791 /* set up our port private structures */
2792 for (i = 0; i < serial->num_ports; ++i) {
2793 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
2794 if (edge_port == NULL) {
2795 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2796 for (j = 0; j < i; ++j) {
2797 kfree (usb_get_serial_port_data(serial->port[j]));
2798 usb_set_serial_port_data(serial->port[j], NULL);
2799 }
2800 usb_set_serial_data(serial, NULL);
2801 kfree(edge_serial);
2802 return -ENOMEM;
2803 }
2804 memset (edge_port, 0, sizeof(struct edgeport_port));
2805 spin_lock_init(&edge_port->ep_lock);
2806 edge_port->port = serial->port[i];
2807 usb_set_serial_port_data(serial->port[i], edge_port);
2808 }
2809
2810 return 0;
2811 }
2812
2813
2814 /****************************************************************************
2815 * edge_shutdown
2816 * This function is called whenever the device is removed from the usb bus.
2817 ****************************************************************************/
2818 static void edge_shutdown (struct usb_serial *serial)
2819 {
2820 int i;
2821
2822 dbg("%s", __FUNCTION__);
2823
2824 /* stop reads and writes on all ports */
2825 for (i=0; i < serial->num_ports; ++i) {
2826 kfree (usb_get_serial_port_data(serial->port[i]));
2827 usb_set_serial_port_data(serial->port[i], NULL);
2828 }
2829 kfree (usb_get_serial_data(serial));
2830 usb_set_serial_data(serial, NULL);
2831 }
2832
2833
2834 /****************************************************************************
2835 * edgeport_init
2836 * This is called by the module subsystem, or on startup to initialize us
2837 ****************************************************************************/
2838 static int __init edgeport_init(void)
2839 {
2840 int retval;
2841
2842 retval = usb_serial_register(&edgeport_2port_device);
2843 if (retval)
2844 goto failed_2port_device_register;
2845 retval = usb_serial_register(&edgeport_4port_device);
2846 if (retval)
2847 goto failed_4port_device_register;
2848 retval = usb_serial_register(&edgeport_8port_device);
2849 if (retval)
2850 goto failed_8port_device_register;
2851 retval = usb_register(&io_driver);
2852 if (retval)
2853 goto failed_usb_register;
2854 info(DRIVER_DESC " " DRIVER_VERSION);
2855 return 0;
2856
2857 failed_usb_register:
2858 usb_serial_deregister(&edgeport_8port_device);
2859 failed_8port_device_register:
2860 usb_serial_deregister(&edgeport_4port_device);
2861 failed_4port_device_register:
2862 usb_serial_deregister(&edgeport_2port_device);
2863 failed_2port_device_register:
2864 return retval;
2865 }
2866
2867
2868 /****************************************************************************
2869 * edgeport_exit
2870 * Called when the driver is about to be unloaded.
2871 ****************************************************************************/
2872 static void __exit edgeport_exit (void)
2873 {
2874 usb_deregister (&io_driver);
2875 usb_serial_deregister (&edgeport_2port_device);
2876 usb_serial_deregister (&edgeport_4port_device);
2877 usb_serial_deregister (&edgeport_8port_device);
2878 }
2879
2880 module_init(edgeport_init);
2881 module_exit(edgeport_exit);
2882
2883 /* Module information */
2884 MODULE_AUTHOR( DRIVER_AUTHOR );
2885 MODULE_DESCRIPTION( DRIVER_DESC );
2886 MODULE_LICENSE("GPL");
2887
2888 module_param(debug, bool, S_IRUGO | S_IWUSR);
2889 MODULE_PARM_DESC(debug, "Debug enabled or not");
2890
2891 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
2892 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
USB Experimental Work