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 * Version history:
31 *
32 * 2003_04_03 al borchers
33 * - fixed a bug (that shows up with dosemu) where the tty struct is
34 * used in a callback after it has been freed
35 *
36 * 2.3 2002_03_08 greg kroah-hartman
37 * - fixed bug when multiple devices were attached at the same time.
38 *
39 * 2.2 2001_11_14 greg kroah-hartman
40 * - fixed bug in edge_close that kept the port from being used more
41 * than once.
42 * - fixed memory leak on device removal.
43 * - fixed potential double free of memory when command urb submitting
44 * failed.
45 * - other small cleanups when the device is removed
46 *
47 * 2.1 2001_07_09 greg kroah-hartman
48 * - added support for TIOCMBIS and TIOCMBIC.
49 *
50 * (04/08/2001) gb
51 * - Identify version on module load.
52 *
53 * 2.0 2001_03_05 greg kroah-hartman
54 * - reworked entire driver to fit properly in with the other usb-serial
55 * drivers. Occasional oopses still happen, but it's a good start.
56 *
57 * 1.2.3 (02/23/2001) greg kroah-hartman
58 * - changed device table to work properly for 2.4.x final format.
59 * - fixed problem with dropping data at high data rates.
60 *
61 * 1.2.2 (11/27/2000) greg kroah-hartman
62 * - cleaned up more NTisms.
63 * - Added device table for 2.4.0-test11
64 *
65 * 1.2.1 (11/08/2000) greg kroah-hartman
66 * - Started to clean up NTisms.
67 * - Fixed problem with dev field of urb for kernels >= 2.4.0-test9
68 *
69 * 1.2 (10/17/2000) David Iacovelli
70 * Remove all EPIC code and GPL source
71 * Fix RELEVANT_IFLAG macro to include flow control
72 * changes port configuration changes.
73 * Fix redefinition of SERIAL_MAGIC
74 * Change all timeout values to 5 seconds
75 * Tried to fix the UHCI multiple urb submission, but failed miserably.
76 * it seems to work fine with OHCI.
77 * ( Greg take a look at the #if 0 at end of WriteCmdUsb() we must
78 * find a way to work arount this UHCI bug )
79 *
80 * 1.1 (10/11/2000) David Iacovelli
81 * Fix XON/XOFF flow control to support both IXON and IXOFF
82 *
83 * 0.9.27 (06/30/2000) David Iacovelli
84 * Added transmit queue and now allocate urb for command writes.
85 *
86 * 0.9.26 (06/29/2000) David Iacovelli
87 * Add support for 80251 based edgeport
88 *
89 * 0.9.25 (06/27/2000) David Iacovelli
90 * Do not close the port if it has multiple opens.
91 *
92 * 0.9.24 (05/26/2000) David Iacovelli
93 * Add IOCTLs to support RXTX and JAVA POS
94 * and first cut at running BlackBox Demo
95 *
96 * 0.9.23 (05/24/2000) David Iacovelli
97 * Add IOCTLs to support RXTX and JAVA POS
98 *
99 * 0.9.22 (05/23/2000) David Iacovelli
100 * fixed bug in enumeration. If epconfig turns on mapping by
101 * path after a device is already plugged in, we now update
102 * the mapping correctly
103 *
104 * 0.9.21 (05/16/2000) David Iacovelli
105 * Added BlockUntilChaseResp() to also wait for txcredits
106 * Updated the way we allocate and handle write URBs
107 * Add debug code to dump buffers
108 *
109 * 0.9.20 (05/01/2000) David Iacovelli
110 * change driver to use usb/tts/
111 *
112 * 0.9.19 (05/01/2000) David Iacovelli
113 * Update code to compile if DEBUG is off
114 *
115 * 0.9.18 (04/28/2000) David Iacovelli
116 * cleanup and test tty_register with devfs
117 *
118 * 0.9.17 (04/27/2000) greg kroah-hartman
119 * changed tty_register around to be like the way it
120 * was before, but now it works properly with devfs.
121 *
122 * 0.9.16 (04/26/2000) david iacovelli
123 * Fixed bug in GetProductInfo()
124 *
125 * 0.9.15 (04/25/2000) david iacovelli
126 * Updated enumeration
127 *
128 * 0.9.14 (04/24/2000) david iacovelli
129 * Removed all config/status IOCTLS and
130 * converted to using /proc/edgeport
131 * still playing with devfs
132 *
133 * 0.9.13 (04/24/2000) david iacovelli
134 * Removed configuration based on ttyUSB0
135 * Added support for configuration using /prod/edgeport
136 * first attempt at using devfs (not working yet!)
137 * Added IOCTL to GetProductInfo()
138 * Added support for custom baud rates
139 * Add support for random port numbers
140 *
141 * 0.9.12 (04/18/2000) david iacovelli
142 * added additional configuration IOCTLs
143 * use ttyUSB0 for configuration
144 *
145 * 0.9.11 (04/17/2000) greg kroah-hartman
146 * fixed module initialization race conditions.
147 * made all urbs dynamically allocated.
148 * made driver devfs compatible. now it only registers the tty device
149 * when the device is actually plugged in.
150 *
151 * 0.9.10 (04/13/2000) greg kroah-hartman
152 * added proc interface framework.
153 *
154 * 0.9.9 (04/13/2000) david iacovelli
155 * added enumeration code and ioctls to configure the device
156 *
157 * 0.9.8 (04/12/2000) david iacovelli
158 * Change interrupt read start when device is plugged in
159 * and stop when device is removed
160 * process interrupt reads when all ports are closed
161 * (keep value of rxBytesAvail consistent with the edgeport)
162 * set the USB_BULK_QUEUE flag so that we can shove a bunch
163 * of urbs at once down the pipe
164 *
165 * 0.9.7 (04/10/2000) david iacovelli
166 * start to add enumeration code.
167 * generate serial number for epic devices
168 * add support for kdb
169 *
170 * 0.9.6 (03/30/2000) david iacovelli
171 * add IOCTL to get string, manufacture, and boot descriptors
172 *
173 * 0.9.5 (03/14/2000) greg kroah-hartman
174 * more error checking added to SerialOpen to try to fix UHCI open problem
175 *
176 * 0.9.4 (03/09/2000) greg kroah-hartman
177 * added more error checking to handle oops when data is hanging
178 * around and tty is abruptly closed.
179 *
180 * 0.9.3 (03/09/2000) david iacovelli
181 * Add epic support for xon/xoff chars
182 * play with performance
183 *
184 * 0.9.2 (03/08/2000) greg kroah-hartman
185 * changed most "info" calls to "dbg"
186 * implemented flow control properly in the termios call
187 *
188 * 0.9.1 (03/08/2000) david iacovelli
189 * added EPIC support
190 * enabled bootloader update
191 *
192 * 0.9 (03/08/2000) greg kroah-hartman
193 * Release to IO networks.
194 * Integrated changes that David made
195 * made getting urbs for writing SMP safe
196 *
197 * 0.8 (03/07/2000) greg kroah-hartman
198 * Release to IO networks.
199 * Fixed problems that were seen in code by David.
200 * Now both Edgeport/4 and Edgeport/2 works properly.
201 * Changed most of the functions to use port instead of serial.
202 *
203 * 0.7 (02/27/2000) greg kroah-hartman
204 * Milestone 3 release.
205 * Release to IO Networks
206 * ioctl for waiting on line change implemented.
207 * ioctl for getting statistics implemented.
208 * multiport support working.
209 * lsr and msr registers are now handled properly.
210 * change break now hooked up and working.
211 * support for all known Edgeport devices.
212 *
213 * 0.6 (02/22/2000) greg kroah-hartman
214 * Release to IO networks.
215 * CHASE is implemented correctly when port is closed.
216 * SerialOpen now blocks correctly until port is fully opened.
217 *
218 * 0.5 (02/20/2000) greg kroah-hartman
219 * Release to IO networks.
220 * Known problems:
221 * modem status register changes are not sent on to the user
222 * CHASE is not implemented when the port is closed.
223 *
224 * 0.4 (02/16/2000) greg kroah-hartman
225 * Second cut at the CeBit demo.
226 * Doesn't leak memory on every write to the port
227 * Still small leaks on startup.
228 * Added support for Edgeport/2 and Edgeport/8
229 *
230 * 0.3 (02/15/2000) greg kroah-hartman
231 * CeBit demo release.
232 * Force the line settings to 4800, 8, 1, e for the demo.
233 * Warning! This version leaks memory like crazy!
234 *
235 * 0.2 (01/30/2000) greg kroah-hartman
236 * Milestone 1 release.
237 * Device is found by USB subsystem, enumerated, fimware is downloaded
238 * and the descriptors are printed to the debug log, config is set, and
239 * green light starts to blink. Open port works, and data can be sent
240 * and received at the default settings of the UART. Loopback connector
241 * and debug log confirms this.
242 *
243 * 0.1 (01/23/2000) greg kroah-hartman
244 * Initial release to help IO Networks try to set up their test system.
245 * Edgeport4 is recognized, firmware is downloaded, config is set so
246 * device blinks green light every 3 sec. Port is bound, but opening,
247 * closing, and sending data do not work properly.
248 *
249 */
250
251 #include <linux/config.h>
252 #include <linux/kernel.h>
253 #include <linux/jiffies.h>
254 #include <linux/errno.h>
255 #include <linux/init.h>
256 #include <linux/slab.h>
257 #include <linux/tty.h>
258 #include <linux/tty_driver.h>
259 #include <linux/tty_flip.h>
260 #include <linux/module.h>
261 #include <linux/spinlock.h>
262 #include <linux/serial.h>
263 #include <linux/ioctl.h>
264 #include <asm/uaccess.h>
265 #include <linux/usb.h>
266 #include "usb-serial.h"
267 #include "io_edgeport.h"
268 #include "io_ionsp.h" /* info for the iosp messages */
269 #include "io_16654.h" /* 16654 UART defines */
270
271 /*
272 * Version Information
273 */
274 #define DRIVER_VERSION "v2.7"
275 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
276 #define DRIVER_DESC "Edgeport USB Serial Driver"
277
278 /* First, the latest boot code - for first generation edgeports */
279 #define IMAGE_ARRAY_NAME BootCodeImage_GEN1
280 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1
281 #include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */
282
283 /* for second generation edgeports */
284 #define IMAGE_ARRAY_NAME BootCodeImage_GEN2
285 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2
286 #include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */
287
288 /* Then finally the main run-time operational code - for first generation edgeports */
289 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1
290 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1
291 #include "io_fw_down.h" /* Define array OperationalCodeImage[] */
292
293 /* for second generation edgeports */
294 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2
295 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2
296 #include "io_fw_down2.h" /* Define array OperationalCodeImage[] */
297
298 #define MAX_NAME_LEN 64
299
300 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
301 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
302 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
303
304 /* receive port state */
305 enum RXSTATE {
306 EXPECT_HDR1 = 0, /* Expect header byte 1 */
307 EXPECT_HDR2 = 1, /* Expect header byte 2 */
308 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
309 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
310 };
311
312
313 /* Transmit Fifo
314 * This Transmit queue is an extension of the edgeport Rx buffer.
315 * The maximum amount of data buffered in both the edgeport
316 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
317 */
318 struct TxFifo {
319 unsigned int head; /* index to head pointer (write) */
320 unsigned int tail; /* index to tail pointer (read) */
321 unsigned int count; /* Bytes in queue */
322 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
323 unsigned char *fifo; /* allocated Buffer */
324 };
325
326 /* This structure holds all of the local port information */
327 struct edgeport_port {
328 __u16 txCredits; /* our current credits for this port */
329 __u16 maxTxCredits; /* the max size of the port */
330
331 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
332 struct urb *write_urb; /* write URB for this port */
333 char write_in_progress; /* TRUE while a write URB is outstanding */
334 spinlock_t ep_lock;
335
336 __u8 shadowLCR; /* last LCR value received */
337 __u8 shadowMCR; /* last MCR value received */
338 __u8 shadowMSR; /* last MSR value received */
339 __u8 shadowLSR; /* last LSR value received */
340 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
341 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
342 __u8 validDataMask;
343 __u32 baudRate;
344
345 char open;
346 char openPending;
347 char commandPending;
348 char closePending;
349 char chaseResponsePending;
350
351 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
352 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
353 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
354 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
355
356 struct async_icount icount;
357 struct usb_serial_port *port; /* loop back to the owner of this object */
358 };
359
360
361 /* This structure holds all of the individual device information */
362 struct edgeport_serial {
363 char name[MAX_NAME_LEN+1]; /* string name of this device */
364
365 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
366 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
367 struct edgeport_product_info product_info; /* Product Info */
368
369 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
370 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
371 struct urb * interrupt_read_urb; /* our interrupt urb */
372
373 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
374 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
375 struct urb * read_urb; /* our bulk read urb */
376 int read_in_progress;
377 spinlock_t es_lock;
378
379 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
380
381 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
382
383 enum RXSTATE rxState; /* the current state of the bulk receive processor */
384 __u8 rxHeader1; /* receive header byte 1 */
385 __u8 rxHeader2; /* receive header byte 2 */
386 __u8 rxHeader3; /* receive header byte 3 */
387 __u8 rxPort; /* the port that we are currently receiving data for */
388 __u8 rxStatusCode; /* the receive status code */
389 __u8 rxStatusParam; /* the receive status paramater */
390 __s16 rxBytesRemaining; /* the number of port bytes left to read */
391 struct usb_serial *serial; /* loop back to the owner of this object */
392 };
393
394 /* baud rate information */
395 struct divisor_table_entry {
396 __u32 BaudRate;
397 __u16 Divisor;
398 };
399
400 //
401 // Define table of divisors for Rev A EdgePort/4 hardware
402 // These assume a 3.6864MHz crystal, the standard /16, and
403 // MCR.7 = 0.
404 //
405 static struct divisor_table_entry divisor_table[] = {
406 { 50, 4608},
407 { 75, 3072},
408 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
409 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
410 { 150, 1536},
411 { 300, 768},
412 { 600, 384},
413 { 1200, 192},
414 { 1800, 128},
415 { 2400, 96},
416 { 4800, 48},
417 { 7200, 32},
418 { 9600, 24},
419 { 14400, 16},
420 { 19200, 12},
421 { 38400, 6},
422 { 57600, 4},
423 { 115200, 2},
424 { 230400, 1},
425 };
426
427 /* local variables */
428 static int debug;
429
430 static int low_latency = 1; /* tty low latency flag, on by default */
431
432 static int CmdUrbs = 0; /* Number of outstanding Command Write Urbs */
433
434
435 /* local function prototypes */
436
437 /* function prototypes for all URB callbacks */
438 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs);
439 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs);
440 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs);
441 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs);
442
443 /* function prototypes for the usbserial callbacks */
444 static int edge_open (struct usb_serial_port *port, struct file *filp);
445 static void edge_close (struct usb_serial_port *port, struct file *filp);
446 static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count);
447 static int edge_write_room (struct usb_serial_port *port);
448 static int edge_chars_in_buffer (struct usb_serial_port *port);
449 static void edge_throttle (struct usb_serial_port *port);
450 static void edge_unthrottle (struct usb_serial_port *port);
451 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios);
452 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
453 static void edge_break (struct usb_serial_port *port, int break_state);
454 static int edge_tiocmget (struct usb_serial_port *port, struct file *file);
455 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
456 static int edge_startup (struct usb_serial *serial);
457 static void edge_shutdown (struct usb_serial *serial);
458
459
460 #include "io_tables.h" /* all of the devices that this driver supports */
461
462 static struct usb_driver io_driver = {
463 .owner = THIS_MODULE,
464 .name = "io_edgeport",
465 .probe = usb_serial_probe,
466 .disconnect = usb_serial_disconnect,
467 .id_table = id_table_combined,
468 };
469
470 /* function prototypes for all of our local functions */
471 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
472 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
473 static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
474 static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr);
475 static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
476 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param);
477 static int calc_baud_rate_divisor (int baud_rate, int *divisor);
478 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate);
479 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios);
480 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
481 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
482 static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
483
484 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
485 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
486 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
487 static void get_manufacturing_desc (struct edgeport_serial *edge_serial);
488 static void get_boot_desc (struct edgeport_serial *edge_serial);
489 static void load_application_firmware (struct edgeport_serial *edge_serial);
490
491 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size);
492
493
494 // ************************************************************************
495 // ************************************************************************
496 // ************************************************************************
497 // ************************************************************************
498
499 /************************************************************************
500 * *
501 * update_edgeport_E2PROM() Compare current versions of *
502 * Boot ROM and Manufacture *
503 * Descriptors with versions *
504 * embedded in this driver *
505 * *
506 ************************************************************************/
507 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
508 {
509 __u32 BootCurVer;
510 __u32 BootNewVer;
511 __u8 BootMajorVersion;
512 __u8 BootMinorVersion;
513 __le16 BootBuildNumber;
514 __u8 *BootImage;
515 __u32 BootSize;
516 struct edge_firmware_image_record *record;
517 unsigned char *firmware;
518 int response;
519
520
521 switch (edge_serial->product_info.iDownloadFile) {
522 case EDGE_DOWNLOAD_FILE_I930:
523 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion;
524 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion;
525 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber);
526 BootImage = &BootCodeImage_GEN1[0];
527 BootSize = sizeof( BootCodeImage_GEN1 );
528 break;
529
530 case EDGE_DOWNLOAD_FILE_80251:
531 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion;
532 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion;
533 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber);
534 BootImage = &BootCodeImage_GEN2[0];
535 BootSize = sizeof( BootCodeImage_GEN2 );
536 break;
537
538 default:
539 return;
540 }
541
542 // Check Boot Image Version
543 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
544 (edge_serial->boot_descriptor.MinorVersion << 16) +
545 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
546
547 BootNewVer = (BootMajorVersion << 24) +
548 (BootMinorVersion << 16) +
549 le16_to_cpu(BootBuildNumber);
550
551 dbg("Current Boot Image version %d.%d.%d",
552 edge_serial->boot_descriptor.MajorVersion,
553 edge_serial->boot_descriptor.MinorVersion,
554 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
555
556
557 if (BootNewVer > BootCurVer) {
558 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
559 edge_serial->boot_descriptor.MajorVersion,
560 edge_serial->boot_descriptor.MinorVersion,
561 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
562 BootMajorVersion,
563 BootMinorVersion,
564 le16_to_cpu(BootBuildNumber));
565
566
567 dbg("Downloading new Boot Image");
568
569 firmware = BootImage;
570
571 for (;;) {
572 record = (struct edge_firmware_image_record *)firmware;
573 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
574 if (response < 0) {
575 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));
576 break;
577 }
578 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
579 if (firmware >= &BootImage[BootSize]) {
580 break;
581 }
582 }
583 } else {
584 dbg("Boot Image -- already up to date");
585 }
586 }
587
588
589 /************************************************************************
590 * *
591 * Get string descriptor from device *
592 * *
593 ************************************************************************/
594 static int get_string (struct usb_device *dev, int Id, char *string)
595 {
596 struct usb_string_descriptor StringDesc;
597 struct usb_string_descriptor *pStringDesc;
598
599 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
600
601 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
602 return 0;
603 }
604
605 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
606
607 if (!pStringDesc) {
608 return 0;
609 }
610
611 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
612 kfree(pStringDesc);
613 return 0;
614 }
615
616 unicode_to_ascii(string, pStringDesc->wData, pStringDesc->bLength/2-1);
617
618 kfree(pStringDesc);
619 return strlen(string);
620 }
621
622
623 #if 0
624 /************************************************************************
625 *
626 * Get string descriptor from device
627 *
628 ************************************************************************/
629 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
630 {
631 struct usb_string_descriptor StringDesc;
632 struct usb_string_descriptor *pStringDesc;
633
634 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
635
636 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
637 return 0;
638 }
639
640 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
641
642 if (!pStringDesc) {
643 return -1;
644 }
645
646 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
647 kfree(pStringDesc);
648 return -1;
649 }
650
651 *pRetDesc = pStringDesc;
652 return 0;
653 }
654 #endif
655
656 static void get_product_info(struct edgeport_serial *edge_serial)
657 {
658 struct edgeport_product_info *product_info = &edge_serial->product_info;
659
660 memset (product_info, 0, sizeof(struct edgeport_product_info));
661
662 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
663 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
664 product_info->ProdInfoVer = 0;
665
666 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
667 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
668 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
669 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
670
671 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion;
672 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion;
673 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber;
674
675 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
676
677 // check if this is 2nd generation hardware
678 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
679 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion;
680 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion;
681 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber);
682 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
683 } else {
684 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion;
685 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion;
686 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber);
687 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
688 }
689
690 // Determine Product type and set appropriate flags
691 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
692 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
693 case ION_DEVICE_ID_EDGEPORT_4T:
694 case ION_DEVICE_ID_EDGEPORT_4:
695 case ION_DEVICE_ID_EDGEPORT_2:
696 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
697 case ION_DEVICE_ID_EDGEPORT_8:
698 case ION_DEVICE_ID_EDGEPORT_421:
699 case ION_DEVICE_ID_EDGEPORT_21:
700 case ION_DEVICE_ID_EDGEPORT_2_DIN:
701 case ION_DEVICE_ID_EDGEPORT_4_DIN:
702 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
703 product_info->IsRS232 = 1;
704 break;
705
706 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485
707 product_info->IsRS422 = 1;
708 product_info->IsRS485 = 1;
709 break;
710
711 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422
712 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422
713 product_info->IsRS422 = 1;
714 break;
715 }
716
717 // Dump Product Info structure
718 dbg("**Product Information:");
719 dbg(" ProductId %x", product_info->ProductId );
720 dbg(" NumPorts %d", product_info->NumPorts );
721 dbg(" ProdInfoVer %d", product_info->ProdInfoVer );
722 dbg(" IsServer %d", product_info->IsServer);
723 dbg(" IsRS232 %d", product_info->IsRS232 );
724 dbg(" IsRS422 %d", product_info->IsRS422 );
725 dbg(" IsRS485 %d", product_info->IsRS485 );
726 dbg(" RomSize %d", product_info->RomSize );
727 dbg(" RamSize %d", product_info->RamSize );
728 dbg(" CpuRev %x", product_info->CpuRev );
729 dbg(" BoardRev %x", product_info->BoardRev);
730 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
731 product_info->BootMinorVersion,
732 le16_to_cpu(product_info->BootBuildNumber));
733 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion,
734 product_info->FirmwareMinorVersion,
735 le16_to_cpu(product_info->FirmwareBuildNumber));
736 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0],
737 product_info->ManufactureDescDate[1],
738 product_info->ManufactureDescDate[2]+1900);
739 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
740
741 }
742
743
744 /************************************************************************/
745 /************************************************************************/
746 /* U S B C A L L B A C K F U N C T I O N S */
747 /* U S B C A L L B A C K F U N C T I O N S */
748 /************************************************************************/
749 /************************************************************************/
750
751 /*****************************************************************************
752 * edge_interrupt_callback
753 * this is the callback function for when we have received data on the
754 * interrupt endpoint.
755 *****************************************************************************/
756 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs)
757 {
758 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
759 struct edgeport_port *edge_port;
760 struct usb_serial_port *port;
761 unsigned char *data = urb->transfer_buffer;
762 int length = urb->actual_length;
763 int bytes_avail;
764 int position;
765 int txCredits;
766 int portNumber;
767 int result;
768
769 dbg("%s", __FUNCTION__);
770
771 switch (urb->status) {
772 case 0:
773 /* success */
774 break;
775 case -ECONNRESET:
776 case -ENOENT:
777 case -ESHUTDOWN:
778 /* this urb is terminated, clean up */
779 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
780 return;
781 default:
782 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
783 goto exit;
784 }
785
786 // process this interrupt-read even if there are no ports open
787 if (length) {
788 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
789
790 if (length > 1) {
791 bytes_avail = data[0] | (data[1] << 8);
792 if (bytes_avail) {
793 spin_lock(&edge_serial->es_lock);
794 edge_serial->rxBytesAvail += bytes_avail;
795 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
796
797 if (edge_serial->rxBytesAvail > 0 &&
798 !edge_serial->read_in_progress) {
799 dbg("%s - posting a read", __FUNCTION__);
800 edge_serial->read_in_progress = TRUE;
801
802 /* we have pending bytes on the bulk in pipe, send a request */
803 edge_serial->read_urb->dev = edge_serial->serial->dev;
804 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
805 if (result) {
806 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result);
807 edge_serial->read_in_progress = FALSE;
808 }
809 }
810 spin_unlock(&edge_serial->es_lock);
811 }
812 }
813 /* grab the txcredits for the ports if available */
814 position = 2;
815 portNumber = 0;
816 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
817 txCredits = data[position] | (data[position+1] << 8);
818 if (txCredits) {
819 port = edge_serial->serial->port[portNumber];
820 edge_port = usb_get_serial_port_data(port);
821 if (edge_port->open) {
822 spin_lock(&edge_port->ep_lock);
823 edge_port->txCredits += txCredits;
824 spin_unlock(&edge_port->ep_lock);
825 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits);
826
827 /* tell the tty driver that something has changed */
828 if (edge_port->port->tty)
829 tty_wakeup(edge_port->port->tty);
830
831 // Since we have more credit, check if more data can be sent
832 send_more_port_data(edge_serial, edge_port);
833 }
834 }
835 position += 2;
836 ++portNumber;
837 }
838 }
839
840 exit:
841 result = usb_submit_urb (urb, GFP_ATOMIC);
842 if (result) {
843 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
844 }
845 }
846
847
848 /*****************************************************************************
849 * edge_bulk_in_callback
850 * this is the callback function for when we have received data on the
851 * bulk in endpoint.
852 *****************************************************************************/
853 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs)
854 {
855 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
856 unsigned char *data = urb->transfer_buffer;
857 int status;
858 __u16 raw_data_length;
859
860 dbg("%s", __FUNCTION__);
861
862 if (urb->status) {
863 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
864 edge_serial->read_in_progress = FALSE;
865 return;
866 }
867
868 if (urb->actual_length == 0) {
869 dbg("%s - read bulk callback with no data", __FUNCTION__);
870 edge_serial->read_in_progress = FALSE;
871 return;
872 }
873
874 raw_data_length = urb->actual_length;
875
876 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data);
877
878 spin_lock(&edge_serial->es_lock);
879
880 /* decrement our rxBytes available by the number that we just got */
881 edge_serial->rxBytesAvail -= raw_data_length;
882
883 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail);
884
885 process_rcvd_data (edge_serial, data, urb->actual_length);
886
887 /* check to see if there's any more data for us to read */
888 if (edge_serial->rxBytesAvail > 0) {
889 dbg("%s - posting a read", __FUNCTION__);
890 edge_serial->read_urb->dev = edge_serial->serial->dev;
891 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
892 if (status) {
893 dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status);
894 edge_serial->read_in_progress = FALSE;
895 }
896 } else {
897 edge_serial->read_in_progress = FALSE;
898 }
899
900 spin_unlock(&edge_serial->es_lock);
901 }
902
903
904 /*****************************************************************************
905 * edge_bulk_out_data_callback
906 * this is the callback function for when we have finished sending serial data
907 * on the bulk out endpoint.
908 *****************************************************************************/
909 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs)
910 {
911 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
912 struct tty_struct *tty;
913
914 dbg("%s", __FUNCTION__);
915
916 if (urb->status) {
917 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
918 }
919
920 tty = edge_port->port->tty;
921
922 if (tty && edge_port->open) {
923 /* let the tty driver wakeup if it has a special write_wakeup function */
924 tty_wakeup(tty);
925 }
926
927 // Release the Write URB
928 edge_port->write_in_progress = FALSE;
929
930 // Check if more data needs to be sent
931 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
932 }
933
934
935 /*****************************************************************************
936 * BulkOutCmdCallback
937 * this is the callback function for when we have finished sending a command
938 * on the bulk out endpoint.
939 *****************************************************************************/
940 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs)
941 {
942 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
943 struct tty_struct *tty;
944 int status = urb->status;
945
946 dbg("%s", __FUNCTION__);
947
948 CmdUrbs--;
949 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
950
951
952 /* clean up the transfer buffer */
953 if (urb->transfer_buffer != NULL) {
954 kfree(urb->transfer_buffer);
955 }
956
957 /* Free the command urb */
958 usb_free_urb (urb);
959
960 if (status) {
961 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
962 return;
963 }
964
965 /* Get pointer to tty */
966 tty = edge_port->port->tty;
967
968 /* tell the tty driver that something has changed */
969 if (tty && edge_port->open)
970 tty_wakeup(tty);
971
972 /* we have completed the command */
973 edge_port->commandPending = FALSE;
974 wake_up_interruptible(&edge_port->wait_command);
975 }
976
977
978 /*****************************************************************************
979 * Driver tty interface functions
980 *****************************************************************************/
981
982 /*****************************************************************************
983 * SerialOpen
984 * this function is called by the tty driver when a port is opened
985 * If successful, we return 0
986 * Otherwise we return a negative error number.
987 *****************************************************************************/
988 static int edge_open (struct usb_serial_port *port, struct file * filp)
989 {
990 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
991 struct usb_serial *serial;
992 struct edgeport_serial *edge_serial;
993 int response;
994 int timeout;
995
996 dbg("%s - port %d", __FUNCTION__, port->number);
997
998 if (edge_port == NULL)
999 return -ENODEV;
1000
1001 if (port->tty)
1002 port->tty->low_latency = low_latency;
1003
1004 /* see if we've set up our endpoint info yet (can't set it up in edge_startup
1005 as the structures were not set up at that time.) */
1006 serial = port->serial;
1007 edge_serial = usb_get_serial_data(serial);
1008 if (edge_serial == NULL) {
1009 return -ENODEV;
1010 }
1011 if (edge_serial->interrupt_in_buffer == NULL) {
1012 struct usb_serial_port *port0 = serial->port[0];
1013
1014 /* not set up yet, so do it now */
1015 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
1016 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
1017 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
1018 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
1019 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
1020 edge_serial->read_urb = port0->read_urb;
1021 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
1022
1023 /* set up our interrupt urb */
1024 usb_fill_int_urb(edge_serial->interrupt_read_urb,
1025 serial->dev,
1026 usb_rcvintpipe(serial->dev,
1027 port0->interrupt_in_endpointAddress),
1028 port0->interrupt_in_buffer,
1029 edge_serial->interrupt_read_urb->transfer_buffer_length,
1030 edge_interrupt_callback, edge_serial,
1031 edge_serial->interrupt_read_urb->interval);
1032
1033 /* set up our bulk in urb */
1034 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
1035 usb_rcvbulkpipe(serial->dev,
1036 port0->bulk_in_endpointAddress),
1037 port0->bulk_in_buffer,
1038 edge_serial->read_urb->transfer_buffer_length,
1039 edge_bulk_in_callback, edge_serial);
1040 edge_serial->read_in_progress = FALSE;
1041
1042 /* start interrupt read for this edgeport
1043 * this interrupt will continue as long as the edgeport is connected */
1044 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
1045 if (response) {
1046 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
1047 }
1048 }
1049
1050 /* initialize our wait queues */
1051 init_waitqueue_head(&edge_port->wait_open);
1052 init_waitqueue_head(&edge_port->wait_chase);
1053 init_waitqueue_head(&edge_port->delta_msr_wait);
1054 init_waitqueue_head(&edge_port->wait_command);
1055
1056 /* initialize our icount structure */
1057 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1058
1059 /* initialize our port settings */
1060 edge_port->txCredits = 0; /* Can't send any data yet */
1061 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */
1062 edge_port->chaseResponsePending = FALSE;
1063
1064 /* send a open port command */
1065 edge_port->openPending = TRUE;
1066 edge_port->open = FALSE;
1067 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
1068
1069 if (response < 0) {
1070 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
1071 edge_port->openPending = FALSE;
1072 return -ENODEV;
1073 }
1074
1075 /* now wait for the port to be completely opened */
1076 timeout = OPEN_TIMEOUT;
1077 while (timeout && edge_port->openPending == TRUE) {
1078 timeout = interruptible_sleep_on_timeout (&edge_port->wait_open, timeout);
1079 }
1080
1081 if (edge_port->open == FALSE) {
1082 /* open timed out */
1083 dbg("%s - open timedout", __FUNCTION__);
1084 edge_port->openPending = FALSE;
1085 return -ENODEV;
1086 }
1087
1088 /* create the txfifo */
1089 edge_port->txfifo.head = 0;
1090 edge_port->txfifo.tail = 0;
1091 edge_port->txfifo.count = 0;
1092 edge_port->txfifo.size = edge_port->maxTxCredits;
1093 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
1094
1095 if (!edge_port->txfifo.fifo) {
1096 dbg("%s - no memory", __FUNCTION__);
1097 edge_close (port, filp);
1098 return -ENOMEM;
1099 }
1100
1101 /* Allocate a URB for the write */
1102 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
1103 edge_port->write_in_progress = FALSE;
1104
1105 if (!edge_port->write_urb) {
1106 dbg("%s - no memory", __FUNCTION__);
1107 edge_close (port, filp);
1108 return -ENOMEM;
1109 }
1110
1111 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
1112
1113 dbg("%s exited", __FUNCTION__);
1114
1115 return 0;
1116 }
1117
1118
1119 /************************************************************************
1120 *
1121 * block_until_chase_response
1122 *
1123 * This function will block the close until one of the following:
1124 * 1. Response to our Chase comes from Edgeport
1125 * 2. A timout of 10 seconds without activity has expired
1126 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
1127 *
1128 ************************************************************************/
1129 static void block_until_chase_response(struct edgeport_port *edge_port)
1130 {
1131 __u16 lastCredits;
1132 int timeout = 1*HZ;
1133 int wait = 10;
1134
1135 while (1) {
1136 // Save Last credits
1137 lastCredits = edge_port->txCredits;
1138
1139 // Did we get our Chase response
1140 if (edge_port->chaseResponsePending == FALSE) {
1141 dbg("%s - Got Chase Response", __FUNCTION__);
1142
1143 // did we get all of our credit back?
1144 if (edge_port->txCredits == edge_port->maxTxCredits ) {
1145 dbg("%s - Got all credits", __FUNCTION__);
1146 return;
1147 }
1148 }
1149
1150 // Block the thread for a while
1151 interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
1152
1153 if (lastCredits == edge_port->txCredits) {
1154 // No activity.. count down.
1155 wait--;
1156 if (wait == 0) {
1157 edge_port->chaseResponsePending = FALSE;
1158 dbg("%s - Chase TIMEOUT", __FUNCTION__);
1159 return;
1160 }
1161 } else {
1162 // Reset timout value back to 10 seconds
1163 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
1164 wait = 10;
1165 }
1166 }
1167 }
1168
1169
1170 /************************************************************************
1171 *
1172 * block_until_tx_empty
1173 *
1174 * This function will block the close until one of the following:
1175 * 1. TX count are 0
1176 * 2. The edgeport has stopped
1177 * 3. A timout of 3 seconds without activity has expired
1178 *
1179 ************************************************************************/
1180 static void block_until_tx_empty (struct edgeport_port *edge_port)
1181 {
1182 struct TxFifo *fifo = &edge_port->txfifo;
1183 __u32 lastCount;
1184 int timeout = HZ/10;
1185 int wait = 30;
1186
1187 while (1) {
1188 // Save Last count
1189 lastCount = fifo->count;
1190
1191 // Is the Edgeport Buffer empty?
1192 if (lastCount == 0) {
1193 dbg("%s - TX Buffer Empty", __FUNCTION__);
1194 return;
1195 }
1196
1197 // Block the thread for a while
1198 interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
1199
1200 dbg("%s wait", __FUNCTION__);
1201
1202 if (lastCount == fifo->count) {
1203 // No activity.. count down.
1204 wait--;
1205 if (wait == 0) {
1206 dbg("%s - TIMEOUT", __FUNCTION__);
1207 return;
1208 }
1209 } else {
1210 // Reset timout value back to seconds
1211 wait = 30;
1212 }
1213 }
1214 }
1215
1216
1217 /*****************************************************************************
1218 * edge_close
1219 * this function is called by the tty driver when a port is closed
1220 *****************************************************************************/
1221 static void edge_close (struct usb_serial_port *port, struct file * filp)
1222 {
1223 struct edgeport_serial *edge_serial;
1224 struct edgeport_port *edge_port;
1225 int status;
1226
1227 dbg("%s - port %d", __FUNCTION__, port->number);
1228
1229 edge_serial = usb_get_serial_data(port->serial);
1230 edge_port = usb_get_serial_port_data(port);
1231 if ((edge_serial == NULL) || (edge_port == NULL))
1232 return;
1233
1234 // block until tx is empty
1235 block_until_tx_empty(edge_port);
1236
1237 edge_port->closePending = TRUE;
1238
1239 /* flush and chase */
1240 edge_port->chaseResponsePending = TRUE;
1241
1242 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1243 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1244 if (status == 0) {
1245 // block until chase finished
1246 block_until_chase_response(edge_port);
1247 } else {
1248 edge_port->chaseResponsePending = FALSE;
1249 }
1250
1251 /* close the port */
1252 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1253 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1254
1255 //port->close = TRUE;
1256 edge_port->closePending = FALSE;
1257 edge_port->open = FALSE;
1258 edge_port->openPending = FALSE;
1259
1260 if (edge_port->write_urb) {
1261 usb_kill_urb(edge_port->write_urb);
1262 }
1263
1264 if (edge_port->write_urb) {
1265 /* if this urb had a transfer buffer already (old transfer) free it */
1266 if (edge_port->write_urb->transfer_buffer != NULL) {
1267 kfree(edge_port->write_urb->transfer_buffer);
1268 }
1269 usb_free_urb (edge_port->write_urb);
1270 edge_port->write_urb = NULL;
1271 }
1272 if (edge_port->txfifo.fifo) {
1273 kfree(edge_port->txfifo.fifo);
1274 edge_port->txfifo.fifo = NULL;
1275 }
1276
1277 dbg("%s exited", __FUNCTION__);
1278 }
1279
1280 /*****************************************************************************
1281 * SerialWrite
1282 * this function is called by the tty driver when data should be written to
1283 * the port.
1284 * If successful, we return the number of bytes written, otherwise we return
1285 * a negative error number.
1286 *****************************************************************************/
1287 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1288 {
1289 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1290 struct TxFifo *fifo;
1291 int copySize;
1292 int bytesleft;
1293 int firsthalf;
1294 int secondhalf;
1295 unsigned long flags;
1296
1297 dbg("%s - port %d", __FUNCTION__, port->number);
1298
1299 if (edge_port == NULL)
1300 return -ENODEV;
1301
1302 // get a pointer to the Tx fifo
1303 fifo = &edge_port->txfifo;
1304
1305 spin_lock_irqsave(&edge_port->ep_lock, flags);
1306
1307 // calculate number of bytes to put in fifo
1308 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1309
1310 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__,
1311 port->number, count, edge_port->txCredits - fifo->count, copySize);
1312
1313 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1314 if (copySize == 0) {
1315 dbg("%s - copySize = Zero", __FUNCTION__);
1316 goto finish_write;
1317 }
1318
1319 // queue the data
1320 // since we can never overflow the buffer we do not have to check for full condition
1321
1322 // the copy is done is two parts -- first fill to the end of the buffer
1323 // then copy the reset from the start of the buffer
1324
1325 bytesleft = fifo->size - fifo->head;
1326 firsthalf = min (bytesleft, copySize);
1327 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1328
1329 /* now copy our data */
1330 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1331 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]);
1332
1333 // update the index and size
1334 fifo->head += firsthalf;
1335 fifo->count += firsthalf;
1336
1337 // wrap the index
1338 if (fifo->head == fifo->size) {
1339 fifo->head = 0;
1340 }
1341
1342 secondhalf = copySize-firsthalf;
1343
1344 if (secondhalf) {
1345 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1346 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1347 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1348 // update the index and size
1349 fifo->count += secondhalf;
1350 fifo->head += secondhalf;
1351 // No need to check for wrap since we can not get to end of fifo in this part
1352 }
1353
1354 finish_write:
1355 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1356
1357 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1358
1359 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1360
1361 return copySize;
1362 }
1363
1364
1365 /************************************************************************
1366 *
1367 * send_more_port_data()
1368 *
1369 * This routine attempts to write additional UART transmit data
1370 * to a port over the USB bulk pipe. It is called (1) when new
1371 * data has been written to a port's TxBuffer from higher layers
1372 * (2) when the peripheral sends us additional TxCredits indicating
1373 * that it can accept more Tx data for a given port; and (3) when
1374 * a bulk write completes successfully and we want to see if we
1375 * can transmit more.
1376 *
1377 ************************************************************************/
1378 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1379 {
1380 struct TxFifo *fifo = &edge_port->txfifo;
1381 struct urb *urb;
1382 unsigned char *buffer;
1383 int status;
1384 int count;
1385 int bytesleft;
1386 int firsthalf;
1387 int secondhalf;
1388 unsigned long flags;
1389
1390 dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1391
1392 spin_lock_irqsave(&edge_port->ep_lock, flags);
1393
1394 if (edge_port->write_in_progress ||
1395 !edge_port->open ||
1396 (fifo->count == 0)) {
1397 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1398 goto exit_send;
1399 }
1400
1401 // since the amount of data in the fifo will always fit into the
1402 // edgeport buffer we do not need to check the write length
1403
1404 // Do we have enough credits for this port to make it worthwhile
1405 // to bother queueing a write. If it's too small, say a few bytes,
1406 // it's better to wait for more credits so we can do a larger
1407 // write.
1408 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1409 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1410 goto exit_send;
1411 }
1412
1413 // lock this write
1414 edge_port->write_in_progress = TRUE;
1415
1416 // get a pointer to the write_urb
1417 urb = edge_port->write_urb;
1418
1419 /* if this urb had a transfer buffer already (old transfer) free it */
1420 if (urb->transfer_buffer != NULL) {
1421 kfree(urb->transfer_buffer);
1422 urb->transfer_buffer = NULL;
1423 }
1424
1425 /* build the data header for the buffer and port that we are about to send out */
1426 count = fifo->count;
1427 buffer = kmalloc (count+2, GFP_ATOMIC);
1428 if (buffer == NULL) {
1429 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1430 edge_port->write_in_progress = FALSE;
1431 goto exit_send;
1432 }
1433 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1434 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1435
1436 /* now copy our data */
1437 bytesleft = fifo->size - fifo->tail;
1438 firsthalf = min (bytesleft, count);
1439 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1440 fifo->tail += firsthalf;
1441 fifo->count -= firsthalf;
1442 if (fifo->tail == fifo->size) {
1443 fifo->tail = 0;
1444 }
1445
1446 secondhalf = count-firsthalf;
1447 if (secondhalf) {
1448 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1449 fifo->tail += secondhalf;
1450 fifo->count -= secondhalf;
1451 }
1452
1453 if (count)
1454 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1455
1456 /* fill up the urb with all of our data and submit it */
1457 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1458 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1459 buffer, count+2, edge_bulk_out_data_callback, edge_port);
1460
1461 /* decrement the number of credits we have by the number we just sent */
1462 edge_port->txCredits -= count;
1463 edge_port->icount.tx += count;
1464
1465 urb->dev = edge_serial->serial->dev;
1466 status = usb_submit_urb(urb, GFP_ATOMIC);
1467 if (status) {
1468 /* something went wrong */
1469 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1470 edge_port->write_in_progress = FALSE;
1471
1472 /* revert the credits as something bad happened. */
1473 edge_port->txCredits += count;
1474 edge_port->icount.tx -= count;
1475 }
1476 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1477
1478 exit_send:
1479 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1480 }
1481
1482
1483 /*****************************************************************************
1484 * edge_write_room
1485 * this function is called by the tty driver when it wants to know how many
1486 * bytes of data we can accept for a specific port.
1487 * If successful, we return the amount of room that we have for this port
1488 * (the txCredits),
1489 * Otherwise we return a negative error number.
1490 *****************************************************************************/
1491 static int edge_write_room (struct usb_serial_port *port)
1492 {
1493 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1494 int room;
1495 unsigned long flags;
1496
1497 dbg("%s", __FUNCTION__);
1498
1499 if (edge_port == NULL)
1500 return -ENODEV;
1501 if (edge_port->closePending == TRUE)
1502 return -ENODEV;
1503
1504 dbg("%s - port %d", __FUNCTION__, port->number);
1505
1506 if (!edge_port->open) {
1507 dbg("%s - port not opened", __FUNCTION__);
1508 return -EINVAL;
1509 }
1510
1511 // total of both buffers is still txCredit
1512 spin_lock_irqsave(&edge_port->ep_lock, flags);
1513 room = edge_port->txCredits - edge_port->txfifo.count;
1514 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1515
1516 dbg("%s - returns %d", __FUNCTION__, room);
1517 return room;
1518 }
1519
1520
1521 /*****************************************************************************
1522 * edge_chars_in_buffer
1523 * this function is called by the tty driver when it wants to know how many
1524 * bytes of data we currently have outstanding in the port (data that has
1525 * been written, but hasn't made it out the port yet)
1526 * If successful, we return the number of bytes left to be written in the
1527 * system,
1528 * Otherwise we return a negative error number.
1529 *****************************************************************************/
1530 static int edge_chars_in_buffer (struct usb_serial_port *port)
1531 {
1532 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1533 int num_chars;
1534 unsigned long flags;
1535
1536 dbg("%s", __FUNCTION__);
1537
1538 if (edge_port == NULL)
1539 return -ENODEV;
1540 if (edge_port->closePending == TRUE)
1541 return -ENODEV;
1542
1543 if (!edge_port->open) {
1544 dbg("%s - port not opened", __FUNCTION__);
1545 return -EINVAL;
1546 }
1547
1548 spin_lock_irqsave(&edge_port->ep_lock, flags);
1549 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1550 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1551 if (num_chars) {
1552 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1553 }
1554
1555 return num_chars;
1556 }
1557
1558
1559 /*****************************************************************************
1560 * SerialThrottle
1561 * this function is called by the tty driver when it wants to stop the data
1562 * being read from the port.
1563 *****************************************************************************/
1564 static void edge_throttle (struct usb_serial_port *port)
1565 {
1566 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1567 struct tty_struct *tty;
1568 int status;
1569
1570 dbg("%s - port %d", __FUNCTION__, port->number);
1571
1572 if (edge_port == NULL)
1573 return;
1574
1575 if (!edge_port->open) {
1576 dbg("%s - port not opened", __FUNCTION__);
1577 return;
1578 }
1579
1580 tty = port->tty;
1581 if (!tty) {
1582 dbg ("%s - no tty available", __FUNCTION__);
1583 return;
1584 }
1585
1586 /* if we are implementing XON/XOFF, send the stop character */
1587 if (I_IXOFF(tty)) {
1588 unsigned char stop_char = STOP_CHAR(tty);
1589 status = edge_write (port, &stop_char, 1);
1590 if (status <= 0) {
1591 return;
1592 }
1593 }
1594
1595 /* if we are implementing RTS/CTS, toggle that line */
1596 if (tty->termios->c_cflag & CRTSCTS) {
1597 edge_port->shadowMCR &= ~MCR_RTS;
1598 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1599 if (status != 0) {
1600 return;
1601 }
1602 }
1603
1604 return;
1605 }
1606
1607
1608 /*****************************************************************************
1609 * edge_unthrottle
1610 * this function is called by the tty driver when it wants to resume the data
1611 * being read from the port (called after SerialThrottle is called)
1612 *****************************************************************************/
1613 static void edge_unthrottle (struct usb_serial_port *port)
1614 {
1615 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1616 struct tty_struct *tty;
1617 int status;
1618
1619 dbg("%s - port %d", __FUNCTION__, port->number);
1620
1621 if (edge_port == NULL)
1622 return;
1623
1624 if (!edge_port->open) {
1625 dbg("%s - port not opened", __FUNCTION__);
1626 return;
1627 }
1628
1629 tty = port->tty;
1630 if (!tty) {
1631 dbg ("%s - no tty available", __FUNCTION__);
1632 return;
1633 }
1634
1635 /* if we are implementing XON/XOFF, send the start character */
1636 if (I_IXOFF(tty)) {
1637 unsigned char start_char = START_CHAR(tty);
1638 status = edge_write (port, &start_char, 1);
1639 if (status <= 0) {
1640 return;
1641 }
1642 }
1643
1644 /* if we are implementing RTS/CTS, toggle that line */
1645 if (tty->termios->c_cflag & CRTSCTS) {
1646 edge_port->shadowMCR |= MCR_RTS;
1647 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1648 if (status != 0) {
1649 return;
1650 }
1651 }
1652
1653 return;
1654 }
1655
1656
1657 /*****************************************************************************
1658 * SerialSetTermios
1659 * this function is called by the tty driver when it wants to change the termios structure
1660 *****************************************************************************/
1661 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1662 {
1663 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1664 struct tty_struct *tty = port->tty;
1665 unsigned int cflag;
1666
1667 if (!port->tty || !port->tty->termios) {
1668 dbg ("%s - no tty or termios", __FUNCTION__);
1669 return;
1670 }
1671
1672 cflag = tty->termios->c_cflag;
1673 /* check that they really want us to change something */
1674 if (old_termios) {
1675 if (cflag == old_termios->c_cflag &&
1676 tty->termios->c_iflag == old_termios->c_iflag) {
1677 dbg("%s - nothing to change", __FUNCTION__);
1678 return;
1679 }
1680 }
1681
1682 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1683 tty->termios->c_cflag, tty->termios->c_iflag);
1684 if (old_termios) {
1685 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1686 old_termios->c_cflag, old_termios->c_iflag);
1687 }
1688
1689 dbg("%s - port %d", __FUNCTION__, port->number);
1690
1691 if (edge_port == NULL)
1692 return;
1693
1694 if (!edge_port->open) {
1695 dbg("%s - port not opened", __FUNCTION__);
1696 return;
1697 }
1698
1699 /* change the port settings to the new ones specified */
1700 change_port_settings (edge_port, old_termios);
1701
1702 return;
1703 }
1704
1705
1706 /*****************************************************************************
1707 * get_lsr_info - get line status register info
1708 *
1709 * Purpose: Let user call ioctl() to get info when the UART physically
1710 * is emptied. On bus types like RS485, the transmitter must
1711 * release the bus after transmitting. This must be done when
1712 * the transmit shift register is empty, not be done when the
1713 * transmit holding register is empty. This functionality
1714 * allows an RS485 driver to be written in user space.
1715 *****************************************************************************/
1716 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1717 {
1718 unsigned int result = 0;
1719 unsigned long flags;
1720
1721 spin_lock_irqsave(&edge_port->ep_lock, flags);
1722 if (edge_port->maxTxCredits == edge_port->txCredits &&
1723 edge_port->txfifo.count == 0) {
1724 dbg("%s -- Empty", __FUNCTION__);
1725 result = TIOCSER_TEMT;
1726 }
1727 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1728
1729 if (copy_to_user(value, &result, sizeof(int)))
1730 return -EFAULT;
1731 return 0;
1732 }
1733
1734 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1735 {
1736 unsigned int result = 0;
1737 struct tty_struct *tty = edge_port->port->tty;
1738
1739 if (!tty)
1740 return -ENOIOCTLCMD;
1741
1742 result = tty->read_cnt;
1743
1744 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result);
1745 if (copy_to_user(value, &result, sizeof(int)))
1746 return -EFAULT;
1747 //return 0;
1748 return -ENOIOCTLCMD;
1749 }
1750
1751 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1752 {
1753 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1754 unsigned int mcr;
1755
1756 dbg("%s - port %d", __FUNCTION__, port->number);
1757
1758 mcr = edge_port->shadowMCR;
1759 if (set & TIOCM_RTS)
1760 mcr |= MCR_RTS;
1761 if (set & TIOCM_DTR)
1762 mcr |= MCR_DTR;
1763 if (set & TIOCM_LOOP)
1764 mcr |= MCR_LOOPBACK;
1765
1766 if (clear & TIOCM_RTS)
1767 mcr &= ~MCR_RTS;
1768 if (clear & TIOCM_DTR)
1769 mcr &= ~MCR_DTR;
1770 if (clear & TIOCM_LOOP)
1771 mcr &= ~MCR_LOOPBACK;
1772
1773 edge_port->shadowMCR = mcr;
1774
1775 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1776
1777 return 0;
1778 }
1779
1780 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1781 {
1782 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1783 unsigned int result = 0;
1784 unsigned int msr;
1785 unsigned int mcr;
1786
1787 dbg("%s - port %d", __FUNCTION__, port->number);
1788
1789 msr = edge_port->shadowMSR;
1790 mcr = edge_port->shadowMCR;
1791 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1792 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1793 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1794 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1795 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1796 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1797
1798
1799 dbg("%s -- %x", __FUNCTION__, result);
1800
1801 return result;
1802 }
1803
1804 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1805 {
1806 struct serial_struct tmp;
1807
1808 if (!retinfo)
1809 return -EFAULT;
1810
1811 memset(&tmp, 0, sizeof(tmp));
1812
1813 tmp.type = PORT_16550A;
1814 tmp.line = edge_port->port->serial->minor;
1815 tmp.port = edge_port->port->number;
1816 tmp.irq = 0;
1817 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1818 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1819 tmp.baud_base = 9600;
1820 tmp.close_delay = 5*HZ;
1821 tmp.closing_wait = 30*HZ;
1822 // tmp.custom_divisor = state->custom_divisor;
1823 // tmp.hub6 = state->hub6;
1824 // tmp.io_type = state->io_type;
1825
1826 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1827 return -EFAULT;
1828 return 0;
1829 }
1830
1831
1832
1833 /*****************************************************************************
1834 * SerialIoctl
1835 * this function handles any ioctl calls to the driver
1836 *****************************************************************************/
1837 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1838 {
1839 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1840 struct async_icount cnow;
1841 struct async_icount cprev;
1842 struct serial_icounter_struct icount;
1843
1844
1845 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1846
1847 switch (cmd) {
1848 // return number of bytes available
1849 case TIOCINQ:
1850 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1851 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1852 break;
1853
1854 case TIOCSERGETLSR:
1855 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1856 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1857 return 0;
1858
1859 case TIOCGSERIAL:
1860 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1861 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1862
1863 case TIOCSSERIAL:
1864 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1865 break;
1866
1867 case TIOCMIWAIT:
1868 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1869 cprev = edge_port->icount;
1870 while (1) {
1871 interruptible_sleep_on(&edge_port->delta_msr_wait);
1872 /* see if a signal did it */
1873 if (signal_pending(current))
1874 return -ERESTARTSYS;
1875 cnow = edge_port->icount;
1876 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1877 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1878 return -EIO; /* no change => error */
1879 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1880 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1881 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1882 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1883 return 0;
1884 }
1885 cprev = cnow;
1886 }
1887 /* NOTREACHED */
1888 break;
1889
1890 case TIOCGICOUNT:
1891 cnow = edge_port->icount;
1892 memset(&icount, 0, sizeof(icount));
1893 icount.cts = cnow.cts;
1894 icount.dsr = cnow.dsr;
1895 icount.rng = cnow.rng;
1896 icount.dcd = cnow.dcd;
1897 icount.rx = cnow.rx;
1898 icount.tx = cnow.tx;
1899 icount.frame = cnow.frame;
1900 icount.overrun = cnow.overrun;
1901 icount.parity = cnow.parity;
1902 icount.brk = cnow.brk;
1903 icount.buf_overrun = cnow.buf_overrun;
1904
1905 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx );
1906 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1907 return -EFAULT;
1908 return 0;
1909 }
1910
1911 return -ENOIOCTLCMD;
1912 }
1913
1914
1915 /*****************************************************************************
1916 * SerialBreak
1917 * this function sends a break to the port
1918 *****************************************************************************/
1919 static void edge_break (struct usb_serial_port *port, int break_state)
1920 {
1921 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1922 int status;
1923
1924 /* flush and chase */
1925 edge_port->chaseResponsePending = TRUE;
1926
1927 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1928 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1929 if (status == 0) {
1930 // block until chase finished
1931 block_until_chase_response(edge_port);
1932 } else {
1933 edge_port->chaseResponsePending = FALSE;
1934 }
1935
1936 if (break_state == -1) {
1937 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1938 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1939 } else {
1940 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1941 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1942 }
1943 if (status) {
1944 dbg("%s - error sending break set/clear command.", __FUNCTION__);
1945 }
1946
1947 return;
1948 }
1949
1950
1951 /*****************************************************************************
1952 * process_rcvd_data
1953 * this function handles the data received on the bulk in pipe.
1954 *****************************************************************************/
1955 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1956 {
1957 struct usb_serial_port *port;
1958 struct edgeport_port *edge_port;
1959 struct tty_struct *tty;
1960 __u16 lastBufferLength;
1961 __u16 rxLen;
1962
1963 dbg("%s", __FUNCTION__);
1964
1965 lastBufferLength = bufferLength + 1;
1966
1967 while (bufferLength > 0) {
1968 /* failsafe incase we get a message that we don't understand */
1969 if (lastBufferLength == bufferLength) {
1970 dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1971 break;
1972 }
1973 lastBufferLength = bufferLength;
1974
1975 switch (edge_serial->rxState) {
1976 case EXPECT_HDR1:
1977 edge_serial->rxHeader1 = *buffer;
1978 ++buffer;
1979 --bufferLength;
1980
1981 if (bufferLength == 0) {
1982 edge_serial->rxState = EXPECT_HDR2;
1983 break;
1984 }
1985 /* otherwise, drop on through */
1986
1987 case EXPECT_HDR2:
1988 edge_serial->rxHeader2 = *buffer;
1989 ++buffer;
1990 --bufferLength;
1991
1992 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1993
1994 // Process depending on whether this header is
1995 // data or status
1996
1997 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1998 // Decode this status header and goto EXPECT_HDR1 (if we
1999 // can process the status with only 2 bytes), or goto
2000 // EXPECT_HDR3 to get the third byte.
2001
2002 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2003 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
2004
2005 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
2006 // This status needs additional bytes. Save what we have
2007 // and then wait for more data.
2008 edge_serial->rxStatusParam = edge_serial->rxHeader2;
2009
2010 edge_serial->rxState = EXPECT_HDR3;
2011 break;
2012 }
2013
2014 // We have all the header bytes, process the status now
2015 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
2016 edge_serial->rxState = EXPECT_HDR1;
2017 break;
2018 } else {
2019 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2020 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
2021
2022 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
2023
2024 //ASSERT( DevExt->RxPort < DevExt->NumPorts );
2025 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
2026
2027 if (bufferLength == 0 ) {
2028 edge_serial->rxState = EXPECT_DATA;
2029 break;
2030 }
2031 // Else, drop through
2032 }
2033
2034 case EXPECT_DATA: // Expect data
2035
2036 if (bufferLength < edge_serial->rxBytesRemaining) {
2037 rxLen = bufferLength;
2038 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer
2039 } else {
2040 // BufLen >= RxBytesRemaining
2041 rxLen = edge_serial->rxBytesRemaining;
2042 edge_serial->rxState = EXPECT_HDR1; // Start another header next time
2043 }
2044
2045 bufferLength -= rxLen;
2046 edge_serial->rxBytesRemaining -= rxLen;
2047
2048 /* spit this data back into the tty driver if this port is open */
2049 if (rxLen) {
2050 port = edge_serial->serial->port[edge_serial->rxPort];
2051 edge_port = usb_get_serial_port_data(port);
2052 if (edge_port->open) {
2053 tty = edge_port->port->tty;
2054 if (tty) {
2055 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
2056 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
2057 }
2058 edge_port->icount.rx += rxLen;
2059 }
2060 buffer += rxLen;
2061 }
2062
2063 break;
2064
2065 case EXPECT_HDR3: // Expect 3rd byte of status header
2066 edge_serial->rxHeader3 = *buffer;
2067 ++buffer;
2068 --bufferLength;
2069
2070 // We have all the header bytes, process the status now
2071 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
2072 edge_serial->rxState = EXPECT_HDR1;
2073 break;
2074
2075 }
2076 }
2077 }
2078
2079
2080 /*****************************************************************************
2081 * process_rcvd_status
2082 * this function handles the any status messages received on the bulk in pipe.
2083 *****************************************************************************/
2084 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
2085 {
2086 struct usb_serial_port *port;
2087 struct edgeport_port *edge_port;
2088 __u8 code = edge_serial->rxStatusCode;
2089
2090 /* switch the port pointer to the one being currently talked about */
2091 port = edge_serial->serial->port[edge_serial->rxPort];
2092 edge_port = usb_get_serial_port_data(port);
2093 if (edge_port == NULL) {
2094 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
2095 return;
2096 }
2097
2098 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
2099
2100 if (code == IOSP_EXT_STATUS) {
2101 switch (byte2) {
2102 case IOSP_EXT_STATUS_CHASE_RSP:
2103 // we want to do EXT status regardless of port open/closed
2104 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
2105 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
2106 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
2107 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
2108 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
2109 // like wait longer in block_until_chase_response, but for now we don't.
2110 edge_port->chaseResponsePending = FALSE;
2111 wake_up_interruptible (&edge_port->wait_chase);
2112 return;
2113
2114 case IOSP_EXT_STATUS_RX_CHECK_RSP:
2115 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
2116 //Port->RxCheckRsp = TRUE;
2117 return;
2118 }
2119 }
2120
2121 if (code == IOSP_STATUS_OPEN_RSP) {
2122 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
2123 edge_port->maxTxCredits = edge_port->txCredits;
2124 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
2125 handle_new_msr (edge_port, byte2);
2126
2127 /* send the current line settings to the port so we are in sync with any further termios calls */
2128 if (edge_port->port->tty)
2129 change_port_settings (edge_port, edge_port->port->tty->termios);
2130
2131 /* we have completed the open */
2132 edge_port->openPending = FALSE;
2133 edge_port->open = TRUE;
2134 wake_up_interruptible(&edge_port->wait_open);
2135 return;
2136 }
2137
2138 // If port is closed, silently discard all rcvd status. We can
2139 // have cases where buffered status is received AFTER the close
2140 // port command is sent to the Edgeport.
2141 if ((!edge_port->open ) || (edge_port->closePending)) {
2142 return;
2143 }
2144
2145 switch (code) {
2146 // Not currently sent by Edgeport
2147 case IOSP_STATUS_LSR:
2148 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2149 handle_new_lsr (edge_port, FALSE, byte2, 0);
2150 break;
2151
2152 case IOSP_STATUS_LSR_DATA:
2153 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2154 // byte2 is LSR Register
2155 // byte3 is broken data byte
2156 handle_new_lsr (edge_port, TRUE, byte2, byte3);
2157 break;
2158 //
2159 // case IOSP_EXT_4_STATUS:
2160 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2161 // break;
2162 //
2163 case IOSP_STATUS_MSR:
2164 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2165
2166 // Process this new modem status and generate appropriate
2167 // events, etc, based on the new status. This routine
2168 // also saves the MSR in Port->ShadowMsr.
2169 handle_new_msr(edge_port, byte2);
2170 break;
2171
2172 default:
2173 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
2174 break;
2175 }
2176
2177 return;
2178 }
2179
2180
2181 /*****************************************************************************
2182 * edge_tty_recv
2183 * this function passes data on to the tty flip buffer
2184 *****************************************************************************/
2185 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2186 {
2187 int cnt;
2188
2189 do {
2190 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2191 tty_flip_buffer_push(tty);
2192 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2193 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2194 __FUNCTION__, length);
2195 return;
2196 }
2197 }
2198 cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count);
2199 memcpy(tty->flip.char_buf_ptr, data, cnt);
2200 memset(tty->flip.flag_buf_ptr, 0, cnt);
2201 tty->flip.char_buf_ptr += cnt;
2202 tty->flip.flag_buf_ptr += cnt;
2203 tty->flip.count += cnt;
2204 data += cnt;
2205 length -= cnt;
2206 } while (length > 0);
2207
2208 tty_flip_buffer_push(tty);
2209 }
2210
2211
2212 /*****************************************************************************
2213 * handle_new_msr
2214 * this function handles any change to the msr register for a port.
2215 *****************************************************************************/
2216 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2217 {
2218 struct async_icount *icount;
2219
2220 dbg("%s %02x", __FUNCTION__, newMsr);
2221
2222 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2223 icount = &edge_port->icount;
2224
2225 /* update input line counters */
2226 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2227 icount->cts++;
2228 }
2229 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2230 icount->dsr++;
2231 }
2232 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2233 icount->dcd++;
2234 }
2235 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2236 icount->rng++;
2237 }
2238 wake_up_interruptible(&edge_port->delta_msr_wait);
2239 }
2240
2241 /* Save the new modem status */
2242 edge_port->shadowMSR = newMsr & 0xf0;
2243
2244 return;
2245 }
2246
2247
2248 /*****************************************************************************
2249 * handle_new_lsr
2250 * this function handles any change to the lsr register for a port.
2251 *****************************************************************************/
2252 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2253 {
2254 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2255 struct async_icount *icount;
2256
2257 dbg("%s - %02x", __FUNCTION__, newLsr);
2258
2259 edge_port->shadowLSR = lsr;
2260
2261 if (newLsr & LSR_BREAK) {
2262 //
2263 // Parity and Framing errors only count if they
2264 // occur exclusive of a break being
2265 // received.
2266 //
2267 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2268 }
2269
2270 /* Place LSR data byte into Rx buffer */
2271 if (lsrData && edge_port->port->tty)
2272 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2273
2274 /* update input line counters */
2275 icount = &edge_port->icount;
2276 if (newLsr & LSR_BREAK) {
2277 icount->brk++;
2278 }
2279 if (newLsr & LSR_OVER_ERR) {
2280 icount->overrun++;
2281 }
2282 if (newLsr & LSR_PAR_ERR) {
2283 icount->parity++;
2284 }
2285 if (newLsr & LSR_FRM_ERR) {
2286 icount->frame++;
2287 }
2288
2289 return;
2290 }
2291
2292
2293 /****************************************************************************
2294 * sram_write
2295 * writes a number of bytes to the Edgeport device's sram starting at the
2296 * given address.
2297 * If successful returns the number of bytes written, otherwise it returns
2298 * a negative error number of the problem.
2299 ****************************************************************************/
2300 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2301 {
2302 int result;
2303 __u16 current_length;
2304 unsigned char *transfer_buffer;
2305
2306 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2307
2308 transfer_buffer = kmalloc (64, GFP_KERNEL);
2309 if (!transfer_buffer) {
2310 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2311 return -ENOMEM;
2312 }
2313
2314 /* need to split these writes up into 64 byte chunks */
2315 result = 0;
2316 while (length > 0) {
2317 if (length > 64) {
2318 current_length = 64;
2319 } else {
2320 current_length = length;
2321 }
2322 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2323 memcpy (transfer_buffer, data, current_length);
2324 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2325 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2326 if (result < 0)
2327 break;
2328 length -= current_length;
2329 addr += current_length;
2330 data += current_length;
2331 }
2332
2333 kfree (transfer_buffer);
2334 return result;
2335 }
2336
2337
2338 /****************************************************************************
2339 * rom_write
2340 * writes a number of bytes to the Edgeport device's ROM starting at the
2341 * given address.
2342 * If successful returns the number of bytes written, otherwise it returns
2343 * a negative error number of the problem.
2344 ****************************************************************************/
2345 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2346 {
2347 int result;
2348 __u16 current_length;
2349 unsigned char *transfer_buffer;
2350
2351 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2352
2353 transfer_buffer = kmalloc (64, GFP_KERNEL);
2354 if (!transfer_buffer) {
2355 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2356 return -ENOMEM;
2357 }
2358
2359 /* need to split these writes up into 64 byte chunks */
2360 result = 0;
2361 while (length > 0) {
2362 if (length > 64) {
2363 current_length = 64;
2364 } else {
2365 current_length = length;
2366 }
2367 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2368 memcpy (transfer_buffer, data, current_length);
2369 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2370 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2371 if (result < 0)
2372 break;
2373 length -= current_length;
2374 addr += current_length;
2375 data += current_length;
2376 }
2377
2378 kfree (transfer_buffer);
2379 return result;
2380 }
2381
2382
2383 /****************************************************************************
2384 * rom_read
2385 * reads a number of bytes from the Edgeport device starting at the given
2386 * address.
2387 * If successful returns the number of bytes read, otherwise it returns
2388 * a negative error number of the problem.
2389 ****************************************************************************/
2390 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2391 {
2392 int result;
2393 __u16 current_length;
2394 unsigned char *transfer_buffer;
2395
2396 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2397
2398 transfer_buffer = kmalloc (64, GFP_KERNEL);
2399 if (!transfer_buffer) {
2400 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2401 return -ENOMEM;
2402 }
2403
2404 /* need to split these reads up into 64 byte chunks */
2405 result = 0;
2406 while (length > 0) {
2407 if (length > 64) {
2408 current_length = 64;
2409 } else {
2410 current_length = length;
2411 }
2412 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2413 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2414 0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2415 if (result < 0)
2416 break;
2417 memcpy (data, transfer_buffer, current_length);
2418 length -= current_length;
2419 addr += current_length;
2420 data += current_length;
2421 }
2422
2423 kfree (transfer_buffer);
2424 return result;
2425 }
2426
2427
2428 /****************************************************************************
2429 * send_iosp_ext_cmd
2430 * Is used to send a IOSP message to the Edgeport device
2431 ****************************************************************************/
2432 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2433 {
2434 unsigned char *buffer;
2435 unsigned char *currentCommand;
2436 int length = 0;
2437 int status = 0;
2438
2439 dbg("%s - %d, %d", __FUNCTION__, command, param);
2440
2441 buffer = kmalloc (10, GFP_ATOMIC);
2442 if (!buffer) {
2443 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2444 return -ENOMEM;
2445 }
2446
2447 currentCommand = buffer;
2448
2449 MAKE_CMD_EXT_CMD (¤tCommand, &length,
2450 edge_port->port->number - edge_port->port->serial->minor,
2451 command, param);
2452
2453 status = write_cmd_usb (edge_port, buffer, length);
2454 if (status) {
2455 /* something bad happened, let's free up the memory */
2456 kfree(buffer);
2457 }
2458
2459 return status;
2460 }
2461
2462
2463 /*****************************************************************************
2464 * write_cmd_usb
2465 * this function writes the given buffer out to the bulk write endpoint.
2466 *****************************************************************************/
2467 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2468 {
2469 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2470 int status = 0;
2471 struct urb *urb;
2472 int timeout;
2473
2474 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2475
2476 /* Allocate our next urb */
2477 urb = usb_alloc_urb (0, GFP_ATOMIC);
2478 if (!urb)
2479 return -ENOMEM;
2480
2481 CmdUrbs++;
2482 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
2483
2484 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2485 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2486 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2487
2488 edge_port->commandPending = TRUE;
2489 status = usb_submit_urb(urb, GFP_ATOMIC);
2490
2491 if (status) {
2492 /* something went wrong */
2493 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2494 usb_kill_urb(urb);
2495 usb_free_urb(urb);
2496 CmdUrbs--;
2497 return status;
2498 }
2499
2500 // wait for command to finish
2501 timeout = COMMAND_TIMEOUT;
2502 #if 0
2503 while (timeout && edge_port->commandPending == TRUE) {
2504 timeout = interruptible_sleep_on_timeout (&edge_port->wait_command, timeout);
2505 }
2506
2507 if (edge_port->commandPending == TRUE) {
2508 /* command timed out */
2509 dbg("%s - command timed out", __FUNCTION__);
2510 status = -EINVAL;
2511 }
2512 #endif
2513 return status;
2514 }
2515
2516
2517 /*****************************************************************************
2518 * send_cmd_write_baud_rate
2519 * this function sends the proper command to change the baud rate of the
2520 * specified port.
2521 *****************************************************************************/
2522 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2523 {
2524 unsigned char *cmdBuffer;
2525 unsigned char *currCmd;
2526 int cmdLen = 0;
2527 int divisor;
2528 int status;
2529 unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2530
2531 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2532
2533 status = calc_baud_rate_divisor (baudRate, &divisor);
2534 if (status) {
2535 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2536 return status;
2537 }
2538
2539 // Alloc memory for the string of commands.
2540 cmdBuffer = kmalloc (0x100, GFP_ATOMIC);
2541 if (!cmdBuffer) {
2542 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2543 return -ENOMEM;
2544 }
2545 currCmd = cmdBuffer;
2546
2547 // Enable access to divisor latch
2548 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2549
2550 // Write the divisor itself
2551 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2552 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2553
2554 // Restore original value to disable access to divisor latch
2555 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2556
2557 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2558 if (status) {
2559 /* something bad happened, let's free up the memory */
2560 kfree (cmdBuffer);
2561 }
2562
2563 return status;
2564 }
2565
2566
2567 /*****************************************************************************
2568 * calc_baud_rate_divisor
2569 * this function calculates the proper baud rate divisor for the specified
2570 * baud rate.
2571 *****************************************************************************/
2572 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2573 {
2574 int i;
2575 __u16 custom;
2576
2577
2578 dbg("%s - %d", __FUNCTION__, baudrate);
2579
2580 for (i = 0; i < NUM_ENTRIES(divisor_table); i++) {
2581 if ( divisor_table[i].BaudRate == baudrate ) {
2582 *divisor = divisor_table[i].Divisor;
2583 return 0;
2584 }
2585 }
2586
2587 // We have tried all of the standard baud rates
2588 // lets try to calculate the divisor for this baud rate
2589 // Make sure the baud rate is reasonable
2590 if (baudrate > 50 && baudrate < 230400) {
2591 // get divisor
2592 custom = (__u16)((230400L + baudrate/2) / baudrate);
2593
2594 *divisor = custom;
2595
2596 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2597 return 0;
2598 }
2599
2600 return -1;
2601 }
2602
2603
2604 /*****************************************************************************
2605 * send_cmd_write_uart_register
2606 * this function builds up a uart register message and sends to to the device.
2607 *****************************************************************************/
2608 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2609 {
2610 unsigned char *cmdBuffer;
2611 unsigned char *currCmd;
2612 unsigned long cmdLen = 0;
2613 int status;
2614
2615 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2616
2617 // Alloc memory for the string of commands.
2618 cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2619 if (cmdBuffer == NULL ) {
2620 return -ENOMEM;
2621 }
2622
2623 currCmd = cmdBuffer;
2624
2625 // Build a cmd in the buffer to write the given register
2626 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2627 edge_port->port->number - edge_port->port->serial->minor,
2628 regNum, regValue);
2629
2630 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2631 if (status) {
2632 /* something bad happened, let's free up the memory */
2633 kfree (cmdBuffer);
2634 }
2635
2636 return status;
2637 }
2638
2639
2640 /*****************************************************************************
2641 * change_port_settings
2642 * This routine is called to set the UART on the device to match the specified
2643 * new settings.
2644 *****************************************************************************/
2645 #ifndef CMSPAR
2646 #define CMSPAR 0
2647 #endif
2648 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios)
2649 {
2650 struct tty_struct *tty;
2651 int baud;
2652 unsigned cflag;
2653 __u8 mask = 0xff;
2654 __u8 lData;
2655 __u8 lParity;
2656 __u8 lStop;
2657 __u8 rxFlow;
2658 __u8 txFlow;
2659 int status;
2660
2661 dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2662
2663 if ((!edge_port->open) &&
2664 (!edge_port->openPending)) {
2665 dbg("%s - port not opened", __FUNCTION__);
2666 return;
2667 }
2668
2669 tty = edge_port->port->tty;
2670 if ((!tty) ||
2671 (!tty->termios)) {
2672 dbg("%s - no tty structures", __FUNCTION__);
2673 return;
2674 }
2675
2676 cflag = tty->termios->c_cflag;
2677
2678 switch (cflag & CSIZE) {
2679 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break;
2680 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break;
2681 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break;
2682 default:
2683 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break;
2684 }
2685
2686 lParity = LCR_PAR_NONE;
2687 if (cflag & PARENB) {
2688 if (cflag & CMSPAR) {
2689 if (cflag & PARODD) {
2690 lParity = LCR_PAR_MARK;
2691 dbg("%s - parity = mark", __FUNCTION__);
2692 } else {
2693 lParity = LCR_PAR_SPACE;
2694 dbg("%s - parity = space", __FUNCTION__);
2695 }
2696 } else if (cflag & PARODD) {
2697 lParity = LCR_PAR_ODD;
2698 dbg("%s - parity = odd", __FUNCTION__);
2699 } else {
2700 lParity = LCR_PAR_EVEN;
2701 dbg("%s - parity = even", __FUNCTION__);
2702 }
2703 } else {
2704 dbg("%s - parity = none", __FUNCTION__);
2705 }
2706
2707 if (cflag & CSTOPB) {
2708 lStop = LCR_STOP_2;
2709 dbg("%s - stop bits = 2", __FUNCTION__);
2710 } else {
2711 lStop = LCR_STOP_1;
2712 dbg("%s - stop bits = 1", __FUNCTION__);
2713 }
2714
2715 /* figure out the flow control settings */
2716 rxFlow = txFlow = 0x00;
2717 if (cflag & CRTSCTS) {
2718 rxFlow |= IOSP_RX_FLOW_RTS;
2719 txFlow |= IOSP_TX_FLOW_CTS;
2720 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2721 } else {
2722 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2723 }
2724
2725 /* if we are implementing XON/XOFF, set the start and stop character in the device */
2726 if (I_IXOFF(tty) || I_IXON(tty)) {
2727 unsigned char stop_char = STOP_CHAR(tty);
2728 unsigned char start_char = START_CHAR(tty);
2729
2730 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2731 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2732
2733 /* if we are implementing INBOUND XON/XOFF */
2734 if (I_IXOFF(tty)) {
2735 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2736 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2737 } else {
2738 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2739 }
2740
2741 /* if we are implementing OUTBOUND XON/XOFF */
2742 if (I_IXON(tty)) {
2743 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2744 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2745 } else {
2746 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2747 }
2748 }
2749
2750 /* Set flow control to the configured value */
2751 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2752 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2753
2754
2755 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2756 edge_port->shadowLCR |= (lData | lParity | lStop);
2757
2758 edge_port->validDataMask = mask;
2759
2760 /* Send the updated LCR value to the EdgePort */
2761 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2762 if (status != 0) {
2763 return;
2764 }
2765
2766 /* set up the MCR register and send it to the EdgePort */
2767 edge_port->shadowMCR = MCR_MASTER_IE;
2768 if (cflag & CBAUD) {
2769 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2770 }
2771 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2772 if (status != 0) {
2773 return;
2774 }
2775
2776 /* Determine divisor based on baud rate */
2777 baud = tty_get_baud_rate(tty);
2778 if (!baud) {
2779 /* pick a default, any default... */
2780 baud = 9600;
2781 }
2782
2783 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2784 status = send_cmd_write_baud_rate (edge_port, baud);
2785
2786 return;
2787 }
2788
2789
2790 /****************************************************************************
2791 * unicode_to_ascii
2792 * Turns a string from Unicode into ASCII.
2793 * Doesn't do a good job with any characters that are outside the normal
2794 * ASCII range, but it's only for debugging...
2795 * NOTE: expects the unicode in LE format
2796 ****************************************************************************/
2797 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size)
2798 {
2799 int i;
2800
2801 if (unicode_size <= 0)
2802 return;
2803
2804 for (i = 0; i < unicode_size; ++i)
2805 string[i] = (char)(le16_to_cpu(unicode[i]));
2806 string[unicode_size] = 0x00;
2807 }
2808
2809
2810 /****************************************************************************
2811 * get_manufacturing_desc
2812 * reads in the manufacturing descriptor and stores it into the serial
2813 * structure.
2814 ****************************************************************************/
2815 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2816 {
2817 int response;
2818
2819 dbg("getting manufacturer descriptor");
2820
2821 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2822 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2823 (__u8 *)(&edge_serial->manuf_descriptor));
2824
2825 if (response < 1) {
2826 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2827 } else {
2828 char string[30];
2829 dbg("**Manufacturer Descriptor");
2830 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize);
2831 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize);
2832 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev);
2833 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev);
2834 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts);
2835 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2836 unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1);
2837 dbg(" SerialNumber: %s", string);
2838 unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1);
2839 dbg(" AssemblyNumber: %s", string);
2840 unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1);
2841 dbg(" OemAssyNumber: %s", string);
2842 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType);
2843 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid);
2844 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig);
2845 }
2846 }
2847
2848
2849 /****************************************************************************
2850 * get_boot_desc
2851 * reads in the bootloader descriptor and stores it into the serial
2852 * structure.
2853 ****************************************************************************/
2854 static void get_boot_desc (struct edgeport_serial *edge_serial)
2855 {
2856 int response;
2857
2858 dbg("getting boot descriptor");
2859
2860 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2861 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2862 (__u8 *)(&edge_serial->boot_descriptor));
2863
2864 if (response < 1) {
2865 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2866 } else {
2867 dbg("**Boot Descriptor:");
2868 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2869 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion);
2870 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion);
2871 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2872 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2873 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0);
2874 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1);
2875 }
2876 }
2877
2878
2879 /****************************************************************************
2880 * load_application_firmware
2881 * This is called to load the application firmware to the device
2882 ****************************************************************************/
2883 static void load_application_firmware (struct edgeport_serial *edge_serial)
2884 {
2885 struct edge_firmware_image_record *record;
2886 unsigned char *firmware;
2887 unsigned char *FirmwareImage;
2888 int ImageSize;
2889 int response;
2890
2891
2892 switch (edge_serial->product_info.iDownloadFile) {
2893 case EDGE_DOWNLOAD_FILE_I930:
2894 dbg("downloading firmware version (930) %d.%d.%d",
2895 OperationalCodeImageVersion_GEN1.MajorVersion,
2896 OperationalCodeImageVersion_GEN1.MinorVersion,
2897 OperationalCodeImageVersion_GEN1.BuildNumber);
2898 firmware = &OperationalCodeImage_GEN1[0];
2899 FirmwareImage = &OperationalCodeImage_GEN1[0];
2900 ImageSize = sizeof(OperationalCodeImage_GEN1);
2901 break;
2902
2903 case EDGE_DOWNLOAD_FILE_80251:
2904 dbg("downloading firmware version (80251) %d.%d.%d",
2905 OperationalCodeImageVersion_GEN2.MajorVersion,
2906 OperationalCodeImageVersion_GEN2.MinorVersion,
2907 OperationalCodeImageVersion_GEN2.BuildNumber);
2908 firmware = &OperationalCodeImage_GEN2[0];
2909 FirmwareImage = &OperationalCodeImage_GEN2[0];
2910 ImageSize = sizeof(OperationalCodeImage_GEN2);
2911 break;
2912
2913 case EDGE_DOWNLOAD_FILE_NONE:
2914 dbg ("No download file specified, skipping download\n");
2915 return;
2916
2917 default:
2918 return;
2919 }
2920
2921
2922 for (;;) {
2923 record = (struct edge_firmware_image_record *)firmware;
2924 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2925 if (response < 0) {
2926 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));
2927 break;
2928 }
2929 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2930 if (firmware >= &FirmwareImage[ImageSize]) {
2931 break;
2932 }
2933 }
2934
2935 dbg("sending exec_dl_code");
2936 response = usb_control_msg (edge_serial->serial->dev,
2937 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2938 USB_REQUEST_ION_EXEC_DL_CODE,
2939 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2940
2941 return;
2942 }
2943
2944
2945 /****************************************************************************
2946 * edge_startup
2947 ****************************************************************************/
2948 static int edge_startup (struct usb_serial *serial)
2949 {
2950 struct edgeport_serial *edge_serial;
2951 struct edgeport_port *edge_port;
2952 struct usb_device *dev;
2953 int i;
2954
2955 dev = serial->dev;
2956
2957 /* create our private serial structure */
2958 edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL);
2959 if (edge_serial == NULL) {
2960 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2961 return -ENOMEM;
2962 }
2963 memset (edge_serial, 0, sizeof(struct edgeport_serial));
2964 spin_lock_init(&edge_serial->es_lock);
2965 edge_serial->serial = serial;
2966 usb_set_serial_data(serial, edge_serial);
2967
2968 /* get the name for the device from the device */
2969 if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) {
2970 edge_serial->name[i-1] = ' ';
2971 }
2972
2973 get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]);
2974
2975 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2976
2977 /* get the manufacturing descriptor for this device */
2978 get_manufacturing_desc (edge_serial);
2979
2980 /* get the boot descriptor */
2981 get_boot_desc (edge_serial);
2982
2983 get_product_info(edge_serial);
2984
2985 /* set the number of ports from the manufacturing description */
2986 /* serial->num_ports = serial->product_info.NumPorts; */
2987 if (edge_serial->product_info.NumPorts != serial->num_ports) {
2988 warn("%s - Device Reported %d serial ports vs core "
2989 "thinking we have %d ports, email greg@kroah.com this info.",
2990 __FUNCTION__, edge_serial->product_info.NumPorts,
2991 serial->num_ports);
2992 }
2993
2994 dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2995
2996 /* now load the application firmware into this device */
2997 load_application_firmware (edge_serial);
2998
2999 dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
3000
3001 /* Check current Edgeport EEPROM and update if necessary */
3002 update_edgeport_E2PROM (edge_serial);
3003
3004 dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
3005
3006 /* set the configuration to use #1 */
3007 // dbg("set_configuration 1");
3008 // usb_set_configuration (dev, 1);
3009
3010 /* we set up the pointers to the endpoints in the edge_open function,
3011 * as the structures aren't created yet. */
3012
3013 /* set up our port private structures */
3014 for (i = 0; i < serial->num_ports; ++i) {
3015 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
3016 if (edge_port == NULL) {
3017 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
3018 usb_set_serial_data(serial, NULL);
3019 kfree(edge_serial);
3020 return -ENOMEM;
3021 }
3022 memset (edge_port, 0, sizeof(struct edgeport_port));
3023 spin_lock_init(&edge_port->ep_lock);
3024 edge_port->port = serial->port[i];
3025 usb_set_serial_port_data(serial->port[i], edge_port);
3026 }
3027
3028 return 0;
3029 }
3030
3031
3032 /****************************************************************************
3033 * edge_shutdown
3034 * This function is called whenever the device is removed from the usb bus.
3035 ****************************************************************************/
3036 static void edge_shutdown (struct usb_serial *serial)
3037 {
3038 int i;
3039
3040 dbg("%s", __FUNCTION__);
3041
3042 /* stop reads and writes on all ports */
3043 for (i=0; i < serial->num_ports; ++i) {
3044 kfree (usb_get_serial_port_data(serial->port[i]));
3045 usb_set_serial_port_data(serial->port[i], NULL);
3046 }
3047 kfree (usb_get_serial_data(serial));
3048 usb_set_serial_data(serial, NULL);
3049 }
3050
3051
3052 /****************************************************************************
3053 * edgeport_init
3054 * This is called by the module subsystem, or on startup to initialize us
3055 ****************************************************************************/
3056 static int __init edgeport_init(void)
3057 {
3058 int retval;
3059
3060 retval = usb_serial_register(&edgeport_2port_device);
3061 if (retval)
3062 goto failed_2port_device_register;
3063 retval = usb_serial_register(&edgeport_4port_device);
3064 if (retval)
3065 goto failed_4port_device_register;
3066 retval = usb_serial_register(&edgeport_8port_device);
3067 if (retval)
3068 goto failed_8port_device_register;
3069 retval = usb_register(&io_driver);
3070 if (retval)
3071 goto failed_usb_register;
3072 info(DRIVER_DESC " " DRIVER_VERSION);
3073 return 0;
3074
3075 failed_usb_register:
3076 usb_serial_deregister(&edgeport_8port_device);
3077 failed_8port_device_register:
3078 usb_serial_deregister(&edgeport_4port_device);
3079 failed_4port_device_register:
3080 usb_serial_deregister(&edgeport_2port_device);
3081 failed_2port_device_register:
3082 return retval;
3083 }
3084
3085
3086 /****************************************************************************
3087 * edgeport_exit
3088 * Called when the driver is about to be unloaded.
3089 ****************************************************************************/
3090 static void __exit edgeport_exit (void)
3091 {
3092 usb_deregister (&io_driver);
3093 usb_serial_deregister (&edgeport_2port_device);
3094 usb_serial_deregister (&edgeport_4port_device);
3095 usb_serial_deregister (&edgeport_8port_device);
3096 }
3097
3098 module_init(edgeport_init);
3099 module_exit(edgeport_exit);
3100
3101 /* Module information */
3102 MODULE_AUTHOR( DRIVER_AUTHOR );
3103 MODULE_DESCRIPTION( DRIVER_DESC );
3104 MODULE_LICENSE("GPL");
3105
3106 module_param(debug, bool, S_IRUGO | S_IWUSR);
3107 MODULE_PARM_DESC(debug, "Debug enabled or not");
3108
3109 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3110 MODULE_PARM_DESC(debug, "Low latency enabled or not");
3111
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