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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / usb / serial / io_edgeport.c
blob04bfe279d763bd15e2bf48eefb71a84b2bff07c8
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 <linux/wait.h>
265 #include <asm/uaccess.h>
266 #include <linux/usb.h>
267 #include "usb-serial.h"
268 #include "io_edgeport.h"
269 #include "io_ionsp.h" /* info for the iosp messages */
270 #include "io_16654.h" /* 16654 UART defines */
271
272 /*
273 * Version Information
274 */
275 #define DRIVER_VERSION "v2.7"
276 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
277 #define DRIVER_DESC "Edgeport USB Serial Driver"
278
279 /* First, the latest boot code - for first generation edgeports */
280 #define IMAGE_ARRAY_NAME BootCodeImage_GEN1
281 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1
282 #include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */
283
284 /* for second generation edgeports */
285 #define IMAGE_ARRAY_NAME BootCodeImage_GEN2
286 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2
287 #include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */
288
289 /* Then finally the main run-time operational code - for first generation edgeports */
290 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1
291 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1
292 #include "io_fw_down.h" /* Define array OperationalCodeImage[] */
293
294 /* for second generation edgeports */
295 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2
296 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2
297 #include "io_fw_down2.h" /* Define array OperationalCodeImage[] */
298
299 #define MAX_NAME_LEN 64
300
301 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
302 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
303 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
304
305 /* receive port state */
306 enum RXSTATE {
307 EXPECT_HDR1 = 0, /* Expect header byte 1 */
308 EXPECT_HDR2 = 1, /* Expect header byte 2 */
309 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
310 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
311 };
312
313
314 /* Transmit Fifo
315 * This Transmit queue is an extension of the edgeport Rx buffer.
316 * The maximum amount of data buffered in both the edgeport
317 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
318 */
319 struct TxFifo {
320 unsigned int head; /* index to head pointer (write) */
321 unsigned int tail; /* index to tail pointer (read) */
322 unsigned int count; /* Bytes in queue */
323 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
324 unsigned char *fifo; /* allocated Buffer */
325 };
326
327 /* This structure holds all of the local port information */
328 struct edgeport_port {
329 __u16 txCredits; /* our current credits for this port */
330 __u16 maxTxCredits; /* the max size of the port */
331
332 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
333 struct urb *write_urb; /* write URB for this port */
334 char write_in_progress; /* TRUE while a write URB is outstanding */
335 spinlock_t ep_lock;
336
337 __u8 shadowLCR; /* last LCR value received */
338 __u8 shadowMCR; /* last MCR value received */
339 __u8 shadowMSR; /* last MSR value received */
340 __u8 shadowLSR; /* last LSR value received */
341 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
342 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
343 __u8 validDataMask;
344 __u32 baudRate;
345
346 char open;
347 char openPending;
348 char commandPending;
349 char closePending;
350 char chaseResponsePending;
351
352 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
353 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
354 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
355 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
356
357 struct async_icount icount;
358 struct usb_serial_port *port; /* loop back to the owner of this object */
359 };
360
361
362 /* This structure holds all of the individual device information */
363 struct edgeport_serial {
364 char name[MAX_NAME_LEN+1]; /* string name of this device */
365
366 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
367 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
368 struct edgeport_product_info product_info; /* Product Info */
369
370 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
371 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
372 struct urb * interrupt_read_urb; /* our interrupt urb */
373
374 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
375 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
376 struct urb * read_urb; /* our bulk read urb */
377 int read_in_progress;
378 spinlock_t es_lock;
379
380 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
381
382 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
383
384 enum RXSTATE rxState; /* the current state of the bulk receive processor */
385 __u8 rxHeader1; /* receive header byte 1 */
386 __u8 rxHeader2; /* receive header byte 2 */
387 __u8 rxHeader3; /* receive header byte 3 */
388 __u8 rxPort; /* the port that we are currently receiving data for */
389 __u8 rxStatusCode; /* the receive status code */
390 __u8 rxStatusParam; /* the receive status paramater */
391 __s16 rxBytesRemaining; /* the number of port bytes left to read */
392 struct usb_serial *serial; /* loop back to the owner of this object */
393 };
394
395 /* baud rate information */
396 struct divisor_table_entry {
397 __u32 BaudRate;
398 __u16 Divisor;
399 };
400
401 //
402 // Define table of divisors for Rev A EdgePort/4 hardware
403 // These assume a 3.6864MHz crystal, the standard /16, and
404 // MCR.7 = 0.
405 //
406 static struct divisor_table_entry divisor_table[] = {
407 { 50, 4608},
408 { 75, 3072},
409 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
410 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
411 { 150, 1536},
412 { 300, 768},
413 { 600, 384},
414 { 1200, 192},
415 { 1800, 128},
416 { 2400, 96},
417 { 4800, 48},
418 { 7200, 32},
419 { 9600, 24},
420 { 14400, 16},
421 { 19200, 12},
422 { 38400, 6},
423 { 57600, 4},
424 { 115200, 2},
425 { 230400, 1},
426 };
427
428 /* local variables */
429 static int debug;
430
431 static int low_latency = 1; /* tty low latency flag, on by default */
432
433 static int CmdUrbs = 0; /* Number of outstanding Command Write Urbs */
434
435
436 /* local function prototypes */
437
438 /* function prototypes for all URB callbacks */
439 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs);
440 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs);
441 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs);
442 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs);
443
444 /* function prototypes for the usbserial callbacks */
445 static int edge_open (struct usb_serial_port *port, struct file *filp);
446 static void edge_close (struct usb_serial_port *port, struct file *filp);
447 static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count);
448 static int edge_write_room (struct usb_serial_port *port);
449 static int edge_chars_in_buffer (struct usb_serial_port *port);
450 static void edge_throttle (struct usb_serial_port *port);
451 static void edge_unthrottle (struct usb_serial_port *port);
452 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios);
453 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
454 static void edge_break (struct usb_serial_port *port, int break_state);
455 static int edge_tiocmget (struct usb_serial_port *port, struct file *file);
456 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
457 static int edge_startup (struct usb_serial *serial);
458 static void edge_shutdown (struct usb_serial *serial);
459
460
461 #include "io_tables.h" /* all of the devices that this driver supports */
462
463 static struct usb_driver io_driver = {
464 .owner = THIS_MODULE,
465 .name = "io_edgeport",
466 .probe = usb_serial_probe,
467 .disconnect = usb_serial_disconnect,
468 .id_table = id_table_combined,
469 };
470
471 /* function prototypes for all of our local functions */
472 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
473 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
474 static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
475 static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr);
476 static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
477 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param);
478 static int calc_baud_rate_divisor (int baud_rate, int *divisor);
479 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate);
480 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios);
481 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
482 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
483 static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
484
485 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
486 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
487 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
488 static void get_manufacturing_desc (struct edgeport_serial *edge_serial);
489 static void get_boot_desc (struct edgeport_serial *edge_serial);
490 static void load_application_firmware (struct edgeport_serial *edge_serial);
491
492 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size);
493
494
495 // ************************************************************************
496 // ************************************************************************
497 // ************************************************************************
498 // ************************************************************************
499
500 /************************************************************************
501 * *
502 * update_edgeport_E2PROM() Compare current versions of *
503 * Boot ROM and Manufacture *
504 * Descriptors with versions *
505 * embedded in this driver *
506 * *
507 ************************************************************************/
508 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
509 {
510 __u32 BootCurVer;
511 __u32 BootNewVer;
512 __u8 BootMajorVersion;
513 __u8 BootMinorVersion;
514 __le16 BootBuildNumber;
515 __u8 *BootImage;
516 __u32 BootSize;
517 struct edge_firmware_image_record *record;
518 unsigned char *firmware;
519 int response;
520
521
522 switch (edge_serial->product_info.iDownloadFile) {
523 case EDGE_DOWNLOAD_FILE_I930:
524 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion;
525 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion;
526 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber);
527 BootImage = &BootCodeImage_GEN1[0];
528 BootSize = sizeof( BootCodeImage_GEN1 );
529 break;
530
531 case EDGE_DOWNLOAD_FILE_80251:
532 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion;
533 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion;
534 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber);
535 BootImage = &BootCodeImage_GEN2[0];
536 BootSize = sizeof( BootCodeImage_GEN2 );
537 break;
538
539 default:
540 return;
541 }
542
543 // Check Boot Image Version
544 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
545 (edge_serial->boot_descriptor.MinorVersion << 16) +
546 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
547
548 BootNewVer = (BootMajorVersion << 24) +
549 (BootMinorVersion << 16) +
550 le16_to_cpu(BootBuildNumber);
551
552 dbg("Current Boot Image version %d.%d.%d",
553 edge_serial->boot_descriptor.MajorVersion,
554 edge_serial->boot_descriptor.MinorVersion,
555 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
556
557
558 if (BootNewVer > BootCurVer) {
559 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
560 edge_serial->boot_descriptor.MajorVersion,
561 edge_serial->boot_descriptor.MinorVersion,
562 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
563 BootMajorVersion,
564 BootMinorVersion,
565 le16_to_cpu(BootBuildNumber));
566
567
568 dbg("Downloading new Boot Image");
569
570 firmware = BootImage;
571
572 for (;;) {
573 record = (struct edge_firmware_image_record *)firmware;
574 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
575 if (response < 0) {
576 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));
577 break;
578 }
579 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
580 if (firmware >= &BootImage[BootSize]) {
581 break;
582 }
583 }
584 } else {
585 dbg("Boot Image -- already up to date");
586 }
587 }
588
589
590 /************************************************************************
591 * *
592 * Get string descriptor from device *
593 * *
594 ************************************************************************/
595 static int get_string (struct usb_device *dev, int Id, char *string)
596 {
597 struct usb_string_descriptor StringDesc;
598 struct usb_string_descriptor *pStringDesc;
599
600 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
601
602 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
603 return 0;
604 }
605
606 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
607
608 if (!pStringDesc) {
609 return 0;
610 }
611
612 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
613 kfree(pStringDesc);
614 return 0;
615 }
616
617 unicode_to_ascii(string, pStringDesc->wData, pStringDesc->bLength/2-1);
618
619 kfree(pStringDesc);
620 return strlen(string);
621 }
622
623
624 #if 0
625 /************************************************************************
626 *
627 * Get string descriptor from device
628 *
629 ************************************************************************/
630 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
631 {
632 struct usb_string_descriptor StringDesc;
633 struct usb_string_descriptor *pStringDesc;
634
635 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
636
637 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
638 return 0;
639 }
640
641 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
642
643 if (!pStringDesc) {
644 return -1;
645 }
646
647 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
648 kfree(pStringDesc);
649 return -1;
650 }
651
652 *pRetDesc = pStringDesc;
653 return 0;
654 }
655 #endif
656
657 static void get_product_info(struct edgeport_serial *edge_serial)
658 {
659 struct edgeport_product_info *product_info = &edge_serial->product_info;
660
661 memset (product_info, 0, sizeof(struct edgeport_product_info));
662
663 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
664 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
665 product_info->ProdInfoVer = 0;
666
667 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
668 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
669 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
670 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
671
672 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion;
673 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion;
674 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber;
675
676 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
677
678 // check if this is 2nd generation hardware
679 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
680 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion;
681 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion;
682 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber);
683 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
684 } else {
685 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion;
686 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion;
687 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber);
688 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
689 }
690
691 // Determine Product type and set appropriate flags
692 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
693 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
694 case ION_DEVICE_ID_EDGEPORT_4T:
695 case ION_DEVICE_ID_EDGEPORT_4:
696 case ION_DEVICE_ID_EDGEPORT_2:
697 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
698 case ION_DEVICE_ID_EDGEPORT_8:
699 case ION_DEVICE_ID_EDGEPORT_421:
700 case ION_DEVICE_ID_EDGEPORT_21:
701 case ION_DEVICE_ID_EDGEPORT_2_DIN:
702 case ION_DEVICE_ID_EDGEPORT_4_DIN:
703 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
704 product_info->IsRS232 = 1;
705 break;
706
707 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485
708 product_info->IsRS422 = 1;
709 product_info->IsRS485 = 1;
710 break;
711
712 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422
713 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422
714 product_info->IsRS422 = 1;
715 break;
716 }
717
718 // Dump Product Info structure
719 dbg("**Product Information:");
720 dbg(" ProductId %x", product_info->ProductId );
721 dbg(" NumPorts %d", product_info->NumPorts );
722 dbg(" ProdInfoVer %d", product_info->ProdInfoVer );
723 dbg(" IsServer %d", product_info->IsServer);
724 dbg(" IsRS232 %d", product_info->IsRS232 );
725 dbg(" IsRS422 %d", product_info->IsRS422 );
726 dbg(" IsRS485 %d", product_info->IsRS485 );
727 dbg(" RomSize %d", product_info->RomSize );
728 dbg(" RamSize %d", product_info->RamSize );
729 dbg(" CpuRev %x", product_info->CpuRev );
730 dbg(" BoardRev %x", product_info->BoardRev);
731 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
732 product_info->BootMinorVersion,
733 le16_to_cpu(product_info->BootBuildNumber));
734 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion,
735 product_info->FirmwareMinorVersion,
736 le16_to_cpu(product_info->FirmwareBuildNumber));
737 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0],
738 product_info->ManufactureDescDate[1],
739 product_info->ManufactureDescDate[2]+1900);
740 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
741
742 }
743
744
745 /************************************************************************/
746 /************************************************************************/
747 /* U S B C A L L B A C K F U N C T I O N S */
748 /* U S B C A L L B A C K F U N C T I O N S */
749 /************************************************************************/
750 /************************************************************************/
751
752 /*****************************************************************************
753 * edge_interrupt_callback
754 * this is the callback function for when we have received data on the
755 * interrupt endpoint.
756 *****************************************************************************/
757 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs)
758 {
759 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
760 struct edgeport_port *edge_port;
761 struct usb_serial_port *port;
762 unsigned char *data = urb->transfer_buffer;
763 int length = urb->actual_length;
764 int bytes_avail;
765 int position;
766 int txCredits;
767 int portNumber;
768 int result;
769
770 dbg("%s", __FUNCTION__);
771
772 switch (urb->status) {
773 case 0:
774 /* success */
775 break;
776 case -ECONNRESET:
777 case -ENOENT:
778 case -ESHUTDOWN:
779 /* this urb is terminated, clean up */
780 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
781 return;
782 default:
783 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
784 goto exit;
785 }
786
787 // process this interrupt-read even if there are no ports open
788 if (length) {
789 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
790
791 if (length > 1) {
792 bytes_avail = data[0] | (data[1] << 8);
793 if (bytes_avail) {
794 spin_lock(&edge_serial->es_lock);
795 edge_serial->rxBytesAvail += bytes_avail;
796 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
797
798 if (edge_serial->rxBytesAvail > 0 &&
799 !edge_serial->read_in_progress) {
800 dbg("%s - posting a read", __FUNCTION__);
801 edge_serial->read_in_progress = TRUE;
802
803 /* we have pending bytes on the bulk in pipe, send a request */
804 edge_serial->read_urb->dev = edge_serial->serial->dev;
805 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
806 if (result) {
807 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result);
808 edge_serial->read_in_progress = FALSE;
809 }
810 }
811 spin_unlock(&edge_serial->es_lock);
812 }
813 }
814 /* grab the txcredits for the ports if available */
815 position = 2;
816 portNumber = 0;
817 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
818 txCredits = data[position] | (data[position+1] << 8);
819 if (txCredits) {
820 port = edge_serial->serial->port[portNumber];
821 edge_port = usb_get_serial_port_data(port);
822 if (edge_port->open) {
823 spin_lock(&edge_port->ep_lock);
824 edge_port->txCredits += txCredits;
825 spin_unlock(&edge_port->ep_lock);
826 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits);
827
828 /* tell the tty driver that something has changed */
829 if (edge_port->port->tty)
830 tty_wakeup(edge_port->port->tty);
831
832 // Since we have more credit, check if more data can be sent
833 send_more_port_data(edge_serial, edge_port);
834 }
835 }
836 position += 2;
837 ++portNumber;
838 }
839 }
840
841 exit:
842 result = usb_submit_urb (urb, GFP_ATOMIC);
843 if (result) {
844 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
845 }
846 }
847
848
849 /*****************************************************************************
850 * edge_bulk_in_callback
851 * this is the callback function for when we have received data on the
852 * bulk in endpoint.
853 *****************************************************************************/
854 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs)
855 {
856 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
857 unsigned char *data = urb->transfer_buffer;
858 int status;
859 __u16 raw_data_length;
860
861 dbg("%s", __FUNCTION__);
862
863 if (urb->status) {
864 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
865 edge_serial->read_in_progress = FALSE;
866 return;
867 }
868
869 if (urb->actual_length == 0) {
870 dbg("%s - read bulk callback with no data", __FUNCTION__);
871 edge_serial->read_in_progress = FALSE;
872 return;
873 }
874
875 raw_data_length = urb->actual_length;
876
877 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data);
878
879 spin_lock(&edge_serial->es_lock);
880
881 /* decrement our rxBytes available by the number that we just got */
882 edge_serial->rxBytesAvail -= raw_data_length;
883
884 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail);
885
886 process_rcvd_data (edge_serial, data, urb->actual_length);
887
888 /* check to see if there's any more data for us to read */
889 if (edge_serial->rxBytesAvail > 0) {
890 dbg("%s - posting a read", __FUNCTION__);
891 edge_serial->read_urb->dev = edge_serial->serial->dev;
892 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
893 if (status) {
894 dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status);
895 edge_serial->read_in_progress = FALSE;
896 }
897 } else {
898 edge_serial->read_in_progress = FALSE;
899 }
900
901 spin_unlock(&edge_serial->es_lock);
902 }
903
904
905 /*****************************************************************************
906 * edge_bulk_out_data_callback
907 * this is the callback function for when we have finished sending serial data
908 * on the bulk out endpoint.
909 *****************************************************************************/
910 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs)
911 {
912 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
913 struct tty_struct *tty;
914
915 dbg("%s", __FUNCTION__);
916
917 if (urb->status) {
918 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
919 }
920
921 tty = edge_port->port->tty;
922
923 if (tty && edge_port->open) {
924 /* let the tty driver wakeup if it has a special write_wakeup function */
925 tty_wakeup(tty);
926 }
927
928 // Release the Write URB
929 edge_port->write_in_progress = FALSE;
930
931 // Check if more data needs to be sent
932 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
933 }
934
935
936 /*****************************************************************************
937 * BulkOutCmdCallback
938 * this is the callback function for when we have finished sending a command
939 * on the bulk out endpoint.
940 *****************************************************************************/
941 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs)
942 {
943 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
944 struct tty_struct *tty;
945 int status = urb->status;
946
947 dbg("%s", __FUNCTION__);
948
949 CmdUrbs--;
950 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
951
952
953 /* clean up the transfer buffer */
954 kfree(urb->transfer_buffer);
955
956 /* Free the command urb */
957 usb_free_urb (urb);
958
959 if (status) {
960 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
961 return;
962 }
963
964 /* Get pointer to tty */
965 tty = edge_port->port->tty;
966
967 /* tell the tty driver that something has changed */
968 if (tty && edge_port->open)
969 tty_wakeup(tty);
970
971 /* we have completed the command */
972 edge_port->commandPending = FALSE;
973 wake_up(&edge_port->wait_command);
974 }
975
976
977 /*****************************************************************************
978 * Driver tty interface functions
979 *****************************************************************************/
980
981 /*****************************************************************************
982 * SerialOpen
983 * this function is called by the tty driver when a port is opened
984 * If successful, we return 0
985 * Otherwise we return a negative error number.
986 *****************************************************************************/
987 static int edge_open (struct usb_serial_port *port, struct file * filp)
988 {
989 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
990 struct usb_serial *serial;
991 struct edgeport_serial *edge_serial;
992 int response;
993
994 dbg("%s - port %d", __FUNCTION__, port->number);
995
996 if (edge_port == NULL)
997 return -ENODEV;
998
999 if (port->tty)
1000 port->tty->low_latency = low_latency;
1001
1002 /* see if we've set up our endpoint info yet (can't set it up in edge_startup
1003 as the structures were not set up at that time.) */
1004 serial = port->serial;
1005 edge_serial = usb_get_serial_data(serial);
1006 if (edge_serial == NULL) {
1007 return -ENODEV;
1008 }
1009 if (edge_serial->interrupt_in_buffer == NULL) {
1010 struct usb_serial_port *port0 = serial->port[0];
1011
1012 /* not set up yet, so do it now */
1013 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
1014 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
1015 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
1016 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
1017 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
1018 edge_serial->read_urb = port0->read_urb;
1019 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
1020
1021 /* set up our interrupt urb */
1022 usb_fill_int_urb(edge_serial->interrupt_read_urb,
1023 serial->dev,
1024 usb_rcvintpipe(serial->dev,
1025 port0->interrupt_in_endpointAddress),
1026 port0->interrupt_in_buffer,
1027 edge_serial->interrupt_read_urb->transfer_buffer_length,
1028 edge_interrupt_callback, edge_serial,
1029 edge_serial->interrupt_read_urb->interval);
1030
1031 /* set up our bulk in urb */
1032 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
1033 usb_rcvbulkpipe(serial->dev,
1034 port0->bulk_in_endpointAddress),
1035 port0->bulk_in_buffer,
1036 edge_serial->read_urb->transfer_buffer_length,
1037 edge_bulk_in_callback, edge_serial);
1038 edge_serial->read_in_progress = FALSE;
1039
1040 /* start interrupt read for this edgeport
1041 * this interrupt will continue as long as the edgeport is connected */
1042 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
1043 if (response) {
1044 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
1045 }
1046 }
1047
1048 /* initialize our wait queues */
1049 init_waitqueue_head(&edge_port->wait_open);
1050 init_waitqueue_head(&edge_port->wait_chase);
1051 init_waitqueue_head(&edge_port->delta_msr_wait);
1052 init_waitqueue_head(&edge_port->wait_command);
1053
1054 /* initialize our icount structure */
1055 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1056
1057 /* initialize our port settings */
1058 edge_port->txCredits = 0; /* Can't send any data yet */
1059 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */
1060 edge_port->chaseResponsePending = FALSE;
1061
1062 /* send a open port command */
1063 edge_port->openPending = TRUE;
1064 edge_port->open = FALSE;
1065 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
1066
1067 if (response < 0) {
1068 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
1069 edge_port->openPending = FALSE;
1070 return -ENODEV;
1071 }
1072
1073 /* now wait for the port to be completely opened */
1074 wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT);
1075
1076 if (edge_port->open == FALSE) {
1077 /* open timed out */
1078 dbg("%s - open timedout", __FUNCTION__);
1079 edge_port->openPending = FALSE;
1080 return -ENODEV;
1081 }
1082
1083 /* create the txfifo */
1084 edge_port->txfifo.head = 0;
1085 edge_port->txfifo.tail = 0;
1086 edge_port->txfifo.count = 0;
1087 edge_port->txfifo.size = edge_port->maxTxCredits;
1088 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
1089
1090 if (!edge_port->txfifo.fifo) {
1091 dbg("%s - no memory", __FUNCTION__);
1092 edge_close (port, filp);
1093 return -ENOMEM;
1094 }
1095
1096 /* Allocate a URB for the write */
1097 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
1098 edge_port->write_in_progress = FALSE;
1099
1100 if (!edge_port->write_urb) {
1101 dbg("%s - no memory", __FUNCTION__);
1102 edge_close (port, filp);
1103 return -ENOMEM;
1104 }
1105
1106 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
1107
1108 dbg("%s exited", __FUNCTION__);
1109
1110 return 0;
1111 }
1112
1113
1114 /************************************************************************
1115 *
1116 * block_until_chase_response
1117 *
1118 * This function will block the close until one of the following:
1119 * 1. Response to our Chase comes from Edgeport
1120 * 2. A timout of 10 seconds without activity has expired
1121 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
1122 *
1123 ************************************************************************/
1124 static void block_until_chase_response(struct edgeport_port *edge_port)
1125 {
1126 DEFINE_WAIT(wait);
1127 __u16 lastCredits;
1128 int timeout = 1*HZ;
1129 int loop = 10;
1130
1131 while (1) {
1132 // Save Last credits
1133 lastCredits = edge_port->txCredits;
1134
1135 // Did we get our Chase response
1136 if (edge_port->chaseResponsePending == FALSE) {
1137 dbg("%s - Got Chase Response", __FUNCTION__);
1138
1139 // did we get all of our credit back?
1140 if (edge_port->txCredits == edge_port->maxTxCredits ) {
1141 dbg("%s - Got all credits", __FUNCTION__);
1142 return;
1143 }
1144 }
1145
1146 // Block the thread for a while
1147 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
1148 schedule_timeout(timeout);
1149 finish_wait(&edge_port->wait_chase, &wait);
1150
1151 if (lastCredits == edge_port->txCredits) {
1152 // No activity.. count down.
1153 loop--;
1154 if (loop == 0) {
1155 edge_port->chaseResponsePending = FALSE;
1156 dbg("%s - Chase TIMEOUT", __FUNCTION__);
1157 return;
1158 }
1159 } else {
1160 // Reset timout value back to 10 seconds
1161 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
1162 loop = 10;
1163 }
1164 }
1165 }
1166
1167
1168 /************************************************************************
1169 *
1170 * block_until_tx_empty
1171 *
1172 * This function will block the close until one of the following:
1173 * 1. TX count are 0
1174 * 2. The edgeport has stopped
1175 * 3. A timout of 3 seconds without activity has expired
1176 *
1177 ************************************************************************/
1178 static void block_until_tx_empty (struct edgeport_port *edge_port)
1179 {
1180 DEFINE_WAIT(wait);
1181 struct TxFifo *fifo = &edge_port->txfifo;
1182 __u32 lastCount;
1183 int timeout = HZ/10;
1184 int loop = 30;
1185
1186 while (1) {
1187 // Save Last count
1188 lastCount = fifo->count;
1189
1190 // Is the Edgeport Buffer empty?
1191 if (lastCount == 0) {
1192 dbg("%s - TX Buffer Empty", __FUNCTION__);
1193 return;
1194 }
1195
1196 // Block the thread for a while
1197 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
1198 schedule_timeout(timeout);
1199 finish_wait(&edge_port->wait_chase, &wait);
1200
1201 dbg("%s wait", __FUNCTION__);
1202
1203 if (lastCount == fifo->count) {
1204 // No activity.. count down.
1205 loop--;
1206 if (loop == 0) {
1207 dbg("%s - TIMEOUT", __FUNCTION__);
1208 return;
1209 }
1210 } else {
1211 // Reset timout value back to seconds
1212 loop = 30;
1213 }
1214 }
1215 }
1216
1217
1218 /*****************************************************************************
1219 * edge_close
1220 * this function is called by the tty driver when a port is closed
1221 *****************************************************************************/
1222 static void edge_close (struct usb_serial_port *port, struct file * filp)
1223 {
1224 struct edgeport_serial *edge_serial;
1225 struct edgeport_port *edge_port;
1226 int status;
1227
1228 dbg("%s - port %d", __FUNCTION__, port->number);
1229
1230 edge_serial = usb_get_serial_data(port->serial);
1231 edge_port = usb_get_serial_port_data(port);
1232 if ((edge_serial == NULL) || (edge_port == NULL))
1233 return;
1234
1235 // block until tx is empty
1236 block_until_tx_empty(edge_port);
1237
1238 edge_port->closePending = TRUE;
1239
1240 /* flush and chase */
1241 edge_port->chaseResponsePending = TRUE;
1242
1243 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1244 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1245 if (status == 0) {
1246 // block until chase finished
1247 block_until_chase_response(edge_port);
1248 } else {
1249 edge_port->chaseResponsePending = FALSE;
1250 }
1251
1252 /* close the port */
1253 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1254 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1255
1256 //port->close = TRUE;
1257 edge_port->closePending = FALSE;
1258 edge_port->open = FALSE;
1259 edge_port->openPending = FALSE;
1260
1261 if (edge_port->write_urb) {
1262 usb_kill_urb(edge_port->write_urb);
1263 }
1264
1265 if (edge_port->write_urb) {
1266 /* if this urb had a transfer buffer already (old transfer) free it */
1267 kfree(edge_port->write_urb->transfer_buffer);
1268 usb_free_urb(edge_port->write_urb);
1269 edge_port->write_urb = NULL;
1270 }
1271 kfree(edge_port->txfifo.fifo);
1272 edge_port->txfifo.fifo = NULL;
1273
1274 dbg("%s exited", __FUNCTION__);
1275 }
1276
1277 /*****************************************************************************
1278 * SerialWrite
1279 * this function is called by the tty driver when data should be written to
1280 * the port.
1281 * If successful, we return the number of bytes written, otherwise we return
1282 * a negative error number.
1283 *****************************************************************************/
1284 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1285 {
1286 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1287 struct TxFifo *fifo;
1288 int copySize;
1289 int bytesleft;
1290 int firsthalf;
1291 int secondhalf;
1292 unsigned long flags;
1293
1294 dbg("%s - port %d", __FUNCTION__, port->number);
1295
1296 if (edge_port == NULL)
1297 return -ENODEV;
1298
1299 // get a pointer to the Tx fifo
1300 fifo = &edge_port->txfifo;
1301
1302 spin_lock_irqsave(&edge_port->ep_lock, flags);
1303
1304 // calculate number of bytes to put in fifo
1305 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1306
1307 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__,
1308 port->number, count, edge_port->txCredits - fifo->count, copySize);
1309
1310 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1311 if (copySize == 0) {
1312 dbg("%s - copySize = Zero", __FUNCTION__);
1313 goto finish_write;
1314 }
1315
1316 // queue the data
1317 // since we can never overflow the buffer we do not have to check for full condition
1318
1319 // the copy is done is two parts -- first fill to the end of the buffer
1320 // then copy the reset from the start of the buffer
1321
1322 bytesleft = fifo->size - fifo->head;
1323 firsthalf = min (bytesleft, copySize);
1324 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1325
1326 /* now copy our data */
1327 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1328 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]);
1329
1330 // update the index and size
1331 fifo->head += firsthalf;
1332 fifo->count += firsthalf;
1333
1334 // wrap the index
1335 if (fifo->head == fifo->size) {
1336 fifo->head = 0;
1337 }
1338
1339 secondhalf = copySize-firsthalf;
1340
1341 if (secondhalf) {
1342 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1343 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1344 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1345 // update the index and size
1346 fifo->count += secondhalf;
1347 fifo->head += secondhalf;
1348 // No need to check for wrap since we can not get to end of fifo in this part
1349 }
1350
1351 finish_write:
1352 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1353
1354 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1355
1356 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1357
1358 return copySize;
1359 }
1360
1361
1362 /************************************************************************
1363 *
1364 * send_more_port_data()
1365 *
1366 * This routine attempts to write additional UART transmit data
1367 * to a port over the USB bulk pipe. It is called (1) when new
1368 * data has been written to a port's TxBuffer from higher layers
1369 * (2) when the peripheral sends us additional TxCredits indicating
1370 * that it can accept more Tx data for a given port; and (3) when
1371 * a bulk write completes successfully and we want to see if we
1372 * can transmit more.
1373 *
1374 ************************************************************************/
1375 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1376 {
1377 struct TxFifo *fifo = &edge_port->txfifo;
1378 struct urb *urb;
1379 unsigned char *buffer;
1380 int status;
1381 int count;
1382 int bytesleft;
1383 int firsthalf;
1384 int secondhalf;
1385 unsigned long flags;
1386
1387 dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1388
1389 spin_lock_irqsave(&edge_port->ep_lock, flags);
1390
1391 if (edge_port->write_in_progress ||
1392 !edge_port->open ||
1393 (fifo->count == 0)) {
1394 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1395 goto exit_send;
1396 }
1397
1398 // since the amount of data in the fifo will always fit into the
1399 // edgeport buffer we do not need to check the write length
1400
1401 // Do we have enough credits for this port to make it worthwhile
1402 // to bother queueing a write. If it's too small, say a few bytes,
1403 // it's better to wait for more credits so we can do a larger
1404 // write.
1405 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1406 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1407 goto exit_send;
1408 }
1409
1410 // lock this write
1411 edge_port->write_in_progress = TRUE;
1412
1413 // get a pointer to the write_urb
1414 urb = edge_port->write_urb;
1415
1416 /* make sure transfer buffer is freed */
1417 kfree(urb->transfer_buffer);
1418 urb->transfer_buffer = NULL;
1419
1420 /* build the data header for the buffer and port that we are about to send out */
1421 count = fifo->count;
1422 buffer = kmalloc (count+2, GFP_ATOMIC);
1423 if (buffer == NULL) {
1424 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1425 edge_port->write_in_progress = FALSE;
1426 goto exit_send;
1427 }
1428 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1429 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1430
1431 /* now copy our data */
1432 bytesleft = fifo->size - fifo->tail;
1433 firsthalf = min (bytesleft, count);
1434 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1435 fifo->tail += firsthalf;
1436 fifo->count -= firsthalf;
1437 if (fifo->tail == fifo->size) {
1438 fifo->tail = 0;
1439 }
1440
1441 secondhalf = count-firsthalf;
1442 if (secondhalf) {
1443 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1444 fifo->tail += secondhalf;
1445 fifo->count -= secondhalf;
1446 }
1447
1448 if (count)
1449 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1450
1451 /* fill up the urb with all of our data and submit it */
1452 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1453 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1454 buffer, count+2, edge_bulk_out_data_callback, edge_port);
1455
1456 /* decrement the number of credits we have by the number we just sent */
1457 edge_port->txCredits -= count;
1458 edge_port->icount.tx += count;
1459
1460 urb->dev = edge_serial->serial->dev;
1461 status = usb_submit_urb(urb, GFP_ATOMIC);
1462 if (status) {
1463 /* something went wrong */
1464 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1465 edge_port->write_in_progress = FALSE;
1466
1467 /* revert the credits as something bad happened. */
1468 edge_port->txCredits += count;
1469 edge_port->icount.tx -= count;
1470 }
1471 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1472
1473 exit_send:
1474 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1475 }
1476
1477
1478 /*****************************************************************************
1479 * edge_write_room
1480 * this function is called by the tty driver when it wants to know how many
1481 * bytes of data we can accept for a specific port.
1482 * If successful, we return the amount of room that we have for this port
1483 * (the txCredits),
1484 * Otherwise we return a negative error number.
1485 *****************************************************************************/
1486 static int edge_write_room (struct usb_serial_port *port)
1487 {
1488 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1489 int room;
1490 unsigned long flags;
1491
1492 dbg("%s", __FUNCTION__);
1493
1494 if (edge_port == NULL)
1495 return -ENODEV;
1496 if (edge_port->closePending == TRUE)
1497 return -ENODEV;
1498
1499 dbg("%s - port %d", __FUNCTION__, port->number);
1500
1501 if (!edge_port->open) {
1502 dbg("%s - port not opened", __FUNCTION__);
1503 return -EINVAL;
1504 }
1505
1506 // total of both buffers is still txCredit
1507 spin_lock_irqsave(&edge_port->ep_lock, flags);
1508 room = edge_port->txCredits - edge_port->txfifo.count;
1509 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1510
1511 dbg("%s - returns %d", __FUNCTION__, room);
1512 return room;
1513 }
1514
1515
1516 /*****************************************************************************
1517 * edge_chars_in_buffer
1518 * this function is called by the tty driver when it wants to know how many
1519 * bytes of data we currently have outstanding in the port (data that has
1520 * been written, but hasn't made it out the port yet)
1521 * If successful, we return the number of bytes left to be written in the
1522 * system,
1523 * Otherwise we return a negative error number.
1524 *****************************************************************************/
1525 static int edge_chars_in_buffer (struct usb_serial_port *port)
1526 {
1527 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1528 int num_chars;
1529 unsigned long flags;
1530
1531 dbg("%s", __FUNCTION__);
1532
1533 if (edge_port == NULL)
1534 return -ENODEV;
1535 if (edge_port->closePending == TRUE)
1536 return -ENODEV;
1537
1538 if (!edge_port->open) {
1539 dbg("%s - port not opened", __FUNCTION__);
1540 return -EINVAL;
1541 }
1542
1543 spin_lock_irqsave(&edge_port->ep_lock, flags);
1544 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1545 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1546 if (num_chars) {
1547 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1548 }
1549
1550 return num_chars;
1551 }
1552
1553
1554 /*****************************************************************************
1555 * SerialThrottle
1556 * this function is called by the tty driver when it wants to stop the data
1557 * being read from the port.
1558 *****************************************************************************/
1559 static void edge_throttle (struct usb_serial_port *port)
1560 {
1561 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1562 struct tty_struct *tty;
1563 int status;
1564
1565 dbg("%s - port %d", __FUNCTION__, port->number);
1566
1567 if (edge_port == NULL)
1568 return;
1569
1570 if (!edge_port->open) {
1571 dbg("%s - port not opened", __FUNCTION__);
1572 return;
1573 }
1574
1575 tty = port->tty;
1576 if (!tty) {
1577 dbg ("%s - no tty available", __FUNCTION__);
1578 return;
1579 }
1580
1581 /* if we are implementing XON/XOFF, send the stop character */
1582 if (I_IXOFF(tty)) {
1583 unsigned char stop_char = STOP_CHAR(tty);
1584 status = edge_write (port, &stop_char, 1);
1585 if (status <= 0) {
1586 return;
1587 }
1588 }
1589
1590 /* if we are implementing RTS/CTS, toggle that line */
1591 if (tty->termios->c_cflag & CRTSCTS) {
1592 edge_port->shadowMCR &= ~MCR_RTS;
1593 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1594 if (status != 0) {
1595 return;
1596 }
1597 }
1598
1599 return;
1600 }
1601
1602
1603 /*****************************************************************************
1604 * edge_unthrottle
1605 * this function is called by the tty driver when it wants to resume the data
1606 * being read from the port (called after SerialThrottle is called)
1607 *****************************************************************************/
1608 static void edge_unthrottle (struct usb_serial_port *port)
1609 {
1610 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1611 struct tty_struct *tty;
1612 int status;
1613
1614 dbg("%s - port %d", __FUNCTION__, port->number);
1615
1616 if (edge_port == NULL)
1617 return;
1618
1619 if (!edge_port->open) {
1620 dbg("%s - port not opened", __FUNCTION__);
1621 return;
1622 }
1623
1624 tty = port->tty;
1625 if (!tty) {
1626 dbg ("%s - no tty available", __FUNCTION__);
1627 return;
1628 }
1629
1630 /* if we are implementing XON/XOFF, send the start character */
1631 if (I_IXOFF(tty)) {
1632 unsigned char start_char = START_CHAR(tty);
1633 status = edge_write (port, &start_char, 1);
1634 if (status <= 0) {
1635 return;
1636 }
1637 }
1638
1639 /* if we are implementing RTS/CTS, toggle that line */
1640 if (tty->termios->c_cflag & CRTSCTS) {
1641 edge_port->shadowMCR |= MCR_RTS;
1642 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1643 if (status != 0) {
1644 return;
1645 }
1646 }
1647
1648 return;
1649 }
1650
1651
1652 /*****************************************************************************
1653 * SerialSetTermios
1654 * this function is called by the tty driver when it wants to change the termios structure
1655 *****************************************************************************/
1656 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1657 {
1658 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1659 struct tty_struct *tty = port->tty;
1660 unsigned int cflag;
1661
1662 if (!port->tty || !port->tty->termios) {
1663 dbg ("%s - no tty or termios", __FUNCTION__);
1664 return;
1665 }
1666
1667 cflag = tty->termios->c_cflag;
1668 /* check that they really want us to change something */
1669 if (old_termios) {
1670 if (cflag == old_termios->c_cflag &&
1671 tty->termios->c_iflag == old_termios->c_iflag) {
1672 dbg("%s - nothing to change", __FUNCTION__);
1673 return;
1674 }
1675 }
1676
1677 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1678 tty->termios->c_cflag, tty->termios->c_iflag);
1679 if (old_termios) {
1680 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1681 old_termios->c_cflag, old_termios->c_iflag);
1682 }
1683
1684 dbg("%s - port %d", __FUNCTION__, port->number);
1685
1686 if (edge_port == NULL)
1687 return;
1688
1689 if (!edge_port->open) {
1690 dbg("%s - port not opened", __FUNCTION__);
1691 return;
1692 }
1693
1694 /* change the port settings to the new ones specified */
1695 change_port_settings (edge_port, old_termios);
1696
1697 return;
1698 }
1699
1700
1701 /*****************************************************************************
1702 * get_lsr_info - get line status register info
1703 *
1704 * Purpose: Let user call ioctl() to get info when the UART physically
1705 * is emptied. On bus types like RS485, the transmitter must
1706 * release the bus after transmitting. This must be done when
1707 * the transmit shift register is empty, not be done when the
1708 * transmit holding register is empty. This functionality
1709 * allows an RS485 driver to be written in user space.
1710 *****************************************************************************/
1711 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1712 {
1713 unsigned int result = 0;
1714 unsigned long flags;
1715
1716 spin_lock_irqsave(&edge_port->ep_lock, flags);
1717 if (edge_port->maxTxCredits == edge_port->txCredits &&
1718 edge_port->txfifo.count == 0) {
1719 dbg("%s -- Empty", __FUNCTION__);
1720 result = TIOCSER_TEMT;
1721 }
1722 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1723
1724 if (copy_to_user(value, &result, sizeof(int)))
1725 return -EFAULT;
1726 return 0;
1727 }
1728
1729 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1730 {
1731 unsigned int result = 0;
1732 struct tty_struct *tty = edge_port->port->tty;
1733
1734 if (!tty)
1735 return -ENOIOCTLCMD;
1736
1737 result = tty->read_cnt;
1738
1739 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result);
1740 if (copy_to_user(value, &result, sizeof(int)))
1741 return -EFAULT;
1742 //return 0;
1743 return -ENOIOCTLCMD;
1744 }
1745
1746 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1747 {
1748 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1749 unsigned int mcr;
1750
1751 dbg("%s - port %d", __FUNCTION__, port->number);
1752
1753 mcr = edge_port->shadowMCR;
1754 if (set & TIOCM_RTS)
1755 mcr |= MCR_RTS;
1756 if (set & TIOCM_DTR)
1757 mcr |= MCR_DTR;
1758 if (set & TIOCM_LOOP)
1759 mcr |= MCR_LOOPBACK;
1760
1761 if (clear & TIOCM_RTS)
1762 mcr &= ~MCR_RTS;
1763 if (clear & TIOCM_DTR)
1764 mcr &= ~MCR_DTR;
1765 if (clear & TIOCM_LOOP)
1766 mcr &= ~MCR_LOOPBACK;
1767
1768 edge_port->shadowMCR = mcr;
1769
1770 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1771
1772 return 0;
1773 }
1774
1775 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1776 {
1777 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1778 unsigned int result = 0;
1779 unsigned int msr;
1780 unsigned int mcr;
1781
1782 dbg("%s - port %d", __FUNCTION__, port->number);
1783
1784 msr = edge_port->shadowMSR;
1785 mcr = edge_port->shadowMCR;
1786 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1787 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1788 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1789 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1790 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1791 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1792
1793
1794 dbg("%s -- %x", __FUNCTION__, result);
1795
1796 return result;
1797 }
1798
1799 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1800 {
1801 struct serial_struct tmp;
1802
1803 if (!retinfo)
1804 return -EFAULT;
1805
1806 memset(&tmp, 0, sizeof(tmp));
1807
1808 tmp.type = PORT_16550A;
1809 tmp.line = edge_port->port->serial->minor;
1810 tmp.port = edge_port->port->number;
1811 tmp.irq = 0;
1812 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1813 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1814 tmp.baud_base = 9600;
1815 tmp.close_delay = 5*HZ;
1816 tmp.closing_wait = 30*HZ;
1817 // tmp.custom_divisor = state->custom_divisor;
1818 // tmp.hub6 = state->hub6;
1819 // tmp.io_type = state->io_type;
1820
1821 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1822 return -EFAULT;
1823 return 0;
1824 }
1825
1826
1827
1828 /*****************************************************************************
1829 * SerialIoctl
1830 * this function handles any ioctl calls to the driver
1831 *****************************************************************************/
1832 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1833 {
1834 DEFINE_WAIT(wait);
1835 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1836 struct async_icount cnow;
1837 struct async_icount cprev;
1838 struct serial_icounter_struct icount;
1839
1840 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1841
1842 switch (cmd) {
1843 // return number of bytes available
1844 case TIOCINQ:
1845 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1846 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1847 break;
1848
1849 case TIOCSERGETLSR:
1850 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1851 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1852 return 0;
1853
1854 case TIOCGSERIAL:
1855 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1856 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1857
1858 case TIOCSSERIAL:
1859 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1860 break;
1861
1862 case TIOCMIWAIT:
1863 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1864 cprev = edge_port->icount;
1865 while (1) {
1866 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1867 schedule();
1868 finish_wait(&edge_port->delta_msr_wait, &wait);
1869 /* see if a signal did it */
1870 if (signal_pending(current))
1871 return -ERESTARTSYS;
1872 cnow = edge_port->icount;
1873 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1874 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1875 return -EIO; /* no change => error */
1876 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1877 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1878 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1879 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1880 return 0;
1881 }
1882 cprev = cnow;
1883 }
1884 /* NOTREACHED */
1885 break;
1886
1887 case TIOCGICOUNT:
1888 cnow = edge_port->icount;
1889 memset(&icount, 0, sizeof(icount));
1890 icount.cts = cnow.cts;
1891 icount.dsr = cnow.dsr;
1892 icount.rng = cnow.rng;
1893 icount.dcd = cnow.dcd;
1894 icount.rx = cnow.rx;
1895 icount.tx = cnow.tx;
1896 icount.frame = cnow.frame;
1897 icount.overrun = cnow.overrun;
1898 icount.parity = cnow.parity;
1899 icount.brk = cnow.brk;
1900 icount.buf_overrun = cnow.buf_overrun;
1901
1902 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx );
1903 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1904 return -EFAULT;
1905 return 0;
1906 }
1907
1908 return -ENOIOCTLCMD;
1909 }
1910
1911
1912 /*****************************************************************************
1913 * SerialBreak
1914 * this function sends a break to the port
1915 *****************************************************************************/
1916 static void edge_break (struct usb_serial_port *port, int break_state)
1917 {
1918 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1919 int status;
1920
1921 /* flush and chase */
1922 edge_port->chaseResponsePending = TRUE;
1923
1924 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1925 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1926 if (status == 0) {
1927 // block until chase finished
1928 block_until_chase_response(edge_port);
1929 } else {
1930 edge_port->chaseResponsePending = FALSE;
1931 }
1932
1933 if (break_state == -1) {
1934 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1935 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1936 } else {
1937 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1938 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1939 }
1940 if (status) {
1941 dbg("%s - error sending break set/clear command.", __FUNCTION__);
1942 }
1943
1944 return;
1945 }
1946
1947
1948 /*****************************************************************************
1949 * process_rcvd_data
1950 * this function handles the data received on the bulk in pipe.
1951 *****************************************************************************/
1952 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1953 {
1954 struct usb_serial_port *port;
1955 struct edgeport_port *edge_port;
1956 struct tty_struct *tty;
1957 __u16 lastBufferLength;
1958 __u16 rxLen;
1959
1960 dbg("%s", __FUNCTION__);
1961
1962 lastBufferLength = bufferLength + 1;
1963
1964 while (bufferLength > 0) {
1965 /* failsafe incase we get a message that we don't understand */
1966 if (lastBufferLength == bufferLength) {
1967 dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1968 break;
1969 }
1970 lastBufferLength = bufferLength;
1971
1972 switch (edge_serial->rxState) {
1973 case EXPECT_HDR1:
1974 edge_serial->rxHeader1 = *buffer;
1975 ++buffer;
1976 --bufferLength;
1977
1978 if (bufferLength == 0) {
1979 edge_serial->rxState = EXPECT_HDR2;
1980 break;
1981 }
1982 /* otherwise, drop on through */
1983
1984 case EXPECT_HDR2:
1985 edge_serial->rxHeader2 = *buffer;
1986 ++buffer;
1987 --bufferLength;
1988
1989 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1990
1991 // Process depending on whether this header is
1992 // data or status
1993
1994 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1995 // Decode this status header and goto EXPECT_HDR1 (if we
1996 // can process the status with only 2 bytes), or goto
1997 // EXPECT_HDR3 to get the third byte.
1998
1999 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2000 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
2001
2002 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
2003 // This status needs additional bytes. Save what we have
2004 // and then wait for more data.
2005 edge_serial->rxStatusParam = edge_serial->rxHeader2;
2006
2007 edge_serial->rxState = EXPECT_HDR3;
2008 break;
2009 }
2010
2011 // We have all the header bytes, process the status now
2012 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
2013 edge_serial->rxState = EXPECT_HDR1;
2014 break;
2015 } else {
2016 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2017 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
2018
2019 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
2020
2021 //ASSERT( DevExt->RxPort < DevExt->NumPorts );
2022 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
2023
2024 if (bufferLength == 0 ) {
2025 edge_serial->rxState = EXPECT_DATA;
2026 break;
2027 }
2028 // Else, drop through
2029 }
2030
2031 case EXPECT_DATA: // Expect data
2032
2033 if (bufferLength < edge_serial->rxBytesRemaining) {
2034 rxLen = bufferLength;
2035 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer
2036 } else {
2037 // BufLen >= RxBytesRemaining
2038 rxLen = edge_serial->rxBytesRemaining;
2039 edge_serial->rxState = EXPECT_HDR1; // Start another header next time
2040 }
2041
2042 bufferLength -= rxLen;
2043 edge_serial->rxBytesRemaining -= rxLen;
2044
2045 /* spit this data back into the tty driver if this port is open */
2046 if (rxLen) {
2047 port = edge_serial->serial->port[edge_serial->rxPort];
2048 edge_port = usb_get_serial_port_data(port);
2049 if (edge_port->open) {
2050 tty = edge_port->port->tty;
2051 if (tty) {
2052 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
2053 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
2054 }
2055 edge_port->icount.rx += rxLen;
2056 }
2057 buffer += rxLen;
2058 }
2059
2060 break;
2061
2062 case EXPECT_HDR3: // Expect 3rd byte of status header
2063 edge_serial->rxHeader3 = *buffer;
2064 ++buffer;
2065 --bufferLength;
2066
2067 // We have all the header bytes, process the status now
2068 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
2069 edge_serial->rxState = EXPECT_HDR1;
2070 break;
2071
2072 }
2073 }
2074 }
2075
2076
2077 /*****************************************************************************
2078 * process_rcvd_status
2079 * this function handles the any status messages received on the bulk in pipe.
2080 *****************************************************************************/
2081 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
2082 {
2083 struct usb_serial_port *port;
2084 struct edgeport_port *edge_port;
2085 __u8 code = edge_serial->rxStatusCode;
2086
2087 /* switch the port pointer to the one being currently talked about */
2088 port = edge_serial->serial->port[edge_serial->rxPort];
2089 edge_port = usb_get_serial_port_data(port);
2090 if (edge_port == NULL) {
2091 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
2092 return;
2093 }
2094
2095 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
2096
2097 if (code == IOSP_EXT_STATUS) {
2098 switch (byte2) {
2099 case IOSP_EXT_STATUS_CHASE_RSP:
2100 // we want to do EXT status regardless of port open/closed
2101 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
2102 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
2103 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
2104 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
2105 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
2106 // like wait longer in block_until_chase_response, but for now we don't.
2107 edge_port->chaseResponsePending = FALSE;
2108 wake_up (&edge_port->wait_chase);
2109 return;
2110
2111 case IOSP_EXT_STATUS_RX_CHECK_RSP:
2112 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
2113 //Port->RxCheckRsp = TRUE;
2114 return;
2115 }
2116 }
2117
2118 if (code == IOSP_STATUS_OPEN_RSP) {
2119 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
2120 edge_port->maxTxCredits = edge_port->txCredits;
2121 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
2122 handle_new_msr (edge_port, byte2);
2123
2124 /* send the current line settings to the port so we are in sync with any further termios calls */
2125 if (edge_port->port->tty)
2126 change_port_settings (edge_port, edge_port->port->tty->termios);
2127
2128 /* we have completed the open */
2129 edge_port->openPending = FALSE;
2130 edge_port->open = TRUE;
2131 wake_up(&edge_port->wait_open);
2132 return;
2133 }
2134
2135 // If port is closed, silently discard all rcvd status. We can
2136 // have cases where buffered status is received AFTER the close
2137 // port command is sent to the Edgeport.
2138 if ((!edge_port->open ) || (edge_port->closePending)) {
2139 return;
2140 }
2141
2142 switch (code) {
2143 // Not currently sent by Edgeport
2144 case IOSP_STATUS_LSR:
2145 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2146 handle_new_lsr (edge_port, FALSE, byte2, 0);
2147 break;
2148
2149 case IOSP_STATUS_LSR_DATA:
2150 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2151 // byte2 is LSR Register
2152 // byte3 is broken data byte
2153 handle_new_lsr (edge_port, TRUE, byte2, byte3);
2154 break;
2155 //
2156 // case IOSP_EXT_4_STATUS:
2157 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2158 // break;
2159 //
2160 case IOSP_STATUS_MSR:
2161 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2162
2163 // Process this new modem status and generate appropriate
2164 // events, etc, based on the new status. This routine
2165 // also saves the MSR in Port->ShadowMsr.
2166 handle_new_msr(edge_port, byte2);
2167 break;
2168
2169 default:
2170 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
2171 break;
2172 }
2173
2174 return;
2175 }
2176
2177
2178 /*****************************************************************************
2179 * edge_tty_recv
2180 * this function passes data on to the tty flip buffer
2181 *****************************************************************************/
2182 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2183 {
2184 int cnt;
2185
2186 do {
2187 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2188 tty_flip_buffer_push(tty);
2189 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2190 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2191 __FUNCTION__, length);
2192 return;
2193 }
2194 }
2195 cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count);
2196 memcpy(tty->flip.char_buf_ptr, data, cnt);
2197 memset(tty->flip.flag_buf_ptr, 0, cnt);
2198 tty->flip.char_buf_ptr += cnt;
2199 tty->flip.flag_buf_ptr += cnt;
2200 tty->flip.count += cnt;
2201 data += cnt;
2202 length -= cnt;
2203 } while (length > 0);
2204
2205 tty_flip_buffer_push(tty);
2206 }
2207
2208
2209 /*****************************************************************************
2210 * handle_new_msr
2211 * this function handles any change to the msr register for a port.
2212 *****************************************************************************/
2213 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2214 {
2215 struct async_icount *icount;
2216
2217 dbg("%s %02x", __FUNCTION__, newMsr);
2218
2219 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2220 icount = &edge_port->icount;
2221
2222 /* update input line counters */
2223 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2224 icount->cts++;
2225 }
2226 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2227 icount->dsr++;
2228 }
2229 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2230 icount->dcd++;
2231 }
2232 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2233 icount->rng++;
2234 }
2235 wake_up_interruptible(&edge_port->delta_msr_wait);
2236 }
2237
2238 /* Save the new modem status */
2239 edge_port->shadowMSR = newMsr & 0xf0;
2240
2241 return;
2242 }
2243
2244
2245 /*****************************************************************************
2246 * handle_new_lsr
2247 * this function handles any change to the lsr register for a port.
2248 *****************************************************************************/
2249 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2250 {
2251 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2252 struct async_icount *icount;
2253
2254 dbg("%s - %02x", __FUNCTION__, newLsr);
2255
2256 edge_port->shadowLSR = lsr;
2257
2258 if (newLsr & LSR_BREAK) {
2259 //
2260 // Parity and Framing errors only count if they
2261 // occur exclusive of a break being
2262 // received.
2263 //
2264 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2265 }
2266
2267 /* Place LSR data byte into Rx buffer */
2268 if (lsrData && edge_port->port->tty)
2269 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2270
2271 /* update input line counters */
2272 icount = &edge_port->icount;
2273 if (newLsr & LSR_BREAK) {
2274 icount->brk++;
2275 }
2276 if (newLsr & LSR_OVER_ERR) {
2277 icount->overrun++;
2278 }
2279 if (newLsr & LSR_PAR_ERR) {
2280 icount->parity++;
2281 }
2282 if (newLsr & LSR_FRM_ERR) {
2283 icount->frame++;
2284 }
2285
2286 return;
2287 }
2288
2289
2290 /****************************************************************************
2291 * sram_write
2292 * writes a number of bytes to the Edgeport device's sram starting at the
2293 * given address.
2294 * If successful returns the number of bytes written, otherwise it returns
2295 * a negative error number of the problem.
2296 ****************************************************************************/
2297 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2298 {
2299 int result;
2300 __u16 current_length;
2301 unsigned char *transfer_buffer;
2302
2303 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2304
2305 transfer_buffer = kmalloc (64, GFP_KERNEL);
2306 if (!transfer_buffer) {
2307 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2308 return -ENOMEM;
2309 }
2310
2311 /* need to split these writes up into 64 byte chunks */
2312 result = 0;
2313 while (length > 0) {
2314 if (length > 64) {
2315 current_length = 64;
2316 } else {
2317 current_length = length;
2318 }
2319 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2320 memcpy (transfer_buffer, data, current_length);
2321 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2322 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2323 if (result < 0)
2324 break;
2325 length -= current_length;
2326 addr += current_length;
2327 data += current_length;
2328 }
2329
2330 kfree (transfer_buffer);
2331 return result;
2332 }
2333
2334
2335 /****************************************************************************
2336 * rom_write
2337 * writes a number of bytes to the Edgeport device's ROM starting at the
2338 * given address.
2339 * If successful returns the number of bytes written, otherwise it returns
2340 * a negative error number of the problem.
2341 ****************************************************************************/
2342 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2343 {
2344 int result;
2345 __u16 current_length;
2346 unsigned char *transfer_buffer;
2347
2348 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2349
2350 transfer_buffer = kmalloc (64, GFP_KERNEL);
2351 if (!transfer_buffer) {
2352 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2353 return -ENOMEM;
2354 }
2355
2356 /* need to split these writes up into 64 byte chunks */
2357 result = 0;
2358 while (length > 0) {
2359 if (length > 64) {
2360 current_length = 64;
2361 } else {
2362 current_length = length;
2363 }
2364 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2365 memcpy (transfer_buffer, data, current_length);
2366 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2367 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2368 if (result < 0)
2369 break;
2370 length -= current_length;
2371 addr += current_length;
2372 data += current_length;
2373 }
2374
2375 kfree (transfer_buffer);
2376 return result;
2377 }
2378
2379
2380 /****************************************************************************
2381 * rom_read
2382 * reads a number of bytes from the Edgeport device starting at the given
2383 * address.
2384 * If successful returns the number of bytes read, otherwise it returns
2385 * a negative error number of the problem.
2386 ****************************************************************************/
2387 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2388 {
2389 int result;
2390 __u16 current_length;
2391 unsigned char *transfer_buffer;
2392
2393 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2394
2395 transfer_buffer = kmalloc (64, GFP_KERNEL);
2396 if (!transfer_buffer) {
2397 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2398 return -ENOMEM;
2399 }
2400
2401 /* need to split these reads up into 64 byte chunks */
2402 result = 0;
2403 while (length > 0) {
2404 if (length > 64) {
2405 current_length = 64;
2406 } else {
2407 current_length = length;
2408 }
2409 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2410 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2411 0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2412 if (result < 0)
2413 break;
2414 memcpy (data, transfer_buffer, current_length);
2415 length -= current_length;
2416 addr += current_length;
2417 data += current_length;
2418 }
2419
2420 kfree (transfer_buffer);
2421 return result;
2422 }
2423
2424
2425 /****************************************************************************
2426 * send_iosp_ext_cmd
2427 * Is used to send a IOSP message to the Edgeport device
2428 ****************************************************************************/
2429 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2430 {
2431 unsigned char *buffer;
2432 unsigned char *currentCommand;
2433 int length = 0;
2434 int status = 0;
2435
2436 dbg("%s - %d, %d", __FUNCTION__, command, param);
2437
2438 buffer = kmalloc (10, GFP_ATOMIC);
2439 if (!buffer) {
2440 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2441 return -ENOMEM;
2442 }
2443
2444 currentCommand = buffer;
2445
2446 MAKE_CMD_EXT_CMD (&currentCommand, &length,
2447 edge_port->port->number - edge_port->port->serial->minor,
2448 command, param);
2449
2450 status = write_cmd_usb (edge_port, buffer, length);
2451 if (status) {
2452 /* something bad happened, let's free up the memory */
2453 kfree(buffer);
2454 }
2455
2456 return status;
2457 }
2458
2459
2460 /*****************************************************************************
2461 * write_cmd_usb
2462 * this function writes the given buffer out to the bulk write endpoint.
2463 *****************************************************************************/
2464 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2465 {
2466 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2467 int status = 0;
2468 struct urb *urb;
2469 int timeout;
2470
2471 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2472
2473 /* Allocate our next urb */
2474 urb = usb_alloc_urb (0, GFP_ATOMIC);
2475 if (!urb)
2476 return -ENOMEM;
2477
2478 CmdUrbs++;
2479 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
2480
2481 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2482 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2483 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2484
2485 edge_port->commandPending = TRUE;
2486 status = usb_submit_urb(urb, GFP_ATOMIC);
2487
2488 if (status) {
2489 /* something went wrong */
2490 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2491 usb_kill_urb(urb);
2492 usb_free_urb(urb);
2493 CmdUrbs--;
2494 return status;
2495 }
2496
2497 // wait for command to finish
2498 timeout = COMMAND_TIMEOUT;
2499 #if 0
2500 wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE));
2501
2502 if (edge_port->commandPending == TRUE) {
2503 /* command timed out */
2504 dbg("%s - command timed out", __FUNCTION__);
2505 status = -EINVAL;
2506 }
2507 #endif
2508 return status;
2509 }
2510
2511
2512 /*****************************************************************************
2513 * send_cmd_write_baud_rate
2514 * this function sends the proper command to change the baud rate of the
2515 * specified port.
2516 *****************************************************************************/
2517 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2518 {
2519 unsigned char *cmdBuffer;
2520 unsigned char *currCmd;
2521 int cmdLen = 0;
2522 int divisor;
2523 int status;
2524 unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2525
2526 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2527
2528 status = calc_baud_rate_divisor (baudRate, &divisor);
2529 if (status) {
2530 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2531 return status;
2532 }
2533
2534 // Alloc memory for the string of commands.
2535 cmdBuffer = kmalloc (0x100, GFP_ATOMIC);
2536 if (!cmdBuffer) {
2537 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2538 return -ENOMEM;
2539 }
2540 currCmd = cmdBuffer;
2541
2542 // Enable access to divisor latch
2543 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2544
2545 // Write the divisor itself
2546 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2547 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2548
2549 // Restore original value to disable access to divisor latch
2550 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2551
2552 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2553 if (status) {
2554 /* something bad happened, let's free up the memory */
2555 kfree (cmdBuffer);
2556 }
2557
2558 return status;
2559 }
2560
2561
2562 /*****************************************************************************
2563 * calc_baud_rate_divisor
2564 * this function calculates the proper baud rate divisor for the specified
2565 * baud rate.
2566 *****************************************************************************/
2567 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2568 {
2569 int i;
2570 __u16 custom;
2571
2572
2573 dbg("%s - %d", __FUNCTION__, baudrate);
2574
2575 for (i = 0; i < NUM_ENTRIES(divisor_table); i++) {
2576 if ( divisor_table[i].BaudRate == baudrate ) {
2577 *divisor = divisor_table[i].Divisor;
2578 return 0;
2579 }
2580 }
2581
2582 // We have tried all of the standard baud rates
2583 // lets try to calculate the divisor for this baud rate
2584 // Make sure the baud rate is reasonable
2585 if (baudrate > 50 && baudrate < 230400) {
2586 // get divisor
2587 custom = (__u16)((230400L + baudrate/2) / baudrate);
2588
2589 *divisor = custom;
2590
2591 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2592 return 0;
2593 }
2594
2595 return -1;
2596 }
2597
2598
2599 /*****************************************************************************
2600 * send_cmd_write_uart_register
2601 * this function builds up a uart register message and sends to to the device.
2602 *****************************************************************************/
2603 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2604 {
2605 unsigned char *cmdBuffer;
2606 unsigned char *currCmd;
2607 unsigned long cmdLen = 0;
2608 int status;
2609
2610 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2611
2612 // Alloc memory for the string of commands.
2613 cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2614 if (cmdBuffer == NULL ) {
2615 return -ENOMEM;
2616 }
2617
2618 currCmd = cmdBuffer;
2619
2620 // Build a cmd in the buffer to write the given register
2621 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2622 edge_port->port->number - edge_port->port->serial->minor,
2623 regNum, regValue);
2624
2625 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2626 if (status) {
2627 /* something bad happened, let's free up the memory */
2628 kfree (cmdBuffer);
2629 }
2630
2631 return status;
2632 }
2633
2634
2635 /*****************************************************************************
2636 * change_port_settings
2637 * This routine is called to set the UART on the device to match the specified
2638 * new settings.
2639 *****************************************************************************/
2640 #ifndef CMSPAR
2641 #define CMSPAR 0
2642 #endif
2643 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios)
2644 {
2645 struct tty_struct *tty;
2646 int baud;
2647 unsigned cflag;
2648 __u8 mask = 0xff;
2649 __u8 lData;
2650 __u8 lParity;
2651 __u8 lStop;
2652 __u8 rxFlow;
2653 __u8 txFlow;
2654 int status;
2655
2656 dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2657
2658 if ((!edge_port->open) &&
2659 (!edge_port->openPending)) {
2660 dbg("%s - port not opened", __FUNCTION__);
2661 return;
2662 }
2663
2664 tty = edge_port->port->tty;
2665 if ((!tty) ||
2666 (!tty->termios)) {
2667 dbg("%s - no tty structures", __FUNCTION__);
2668 return;
2669 }
2670
2671 cflag = tty->termios->c_cflag;
2672
2673 switch (cflag & CSIZE) {
2674 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break;
2675 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break;
2676 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break;
2677 default:
2678 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break;
2679 }
2680
2681 lParity = LCR_PAR_NONE;
2682 if (cflag & PARENB) {
2683 if (cflag & CMSPAR) {
2684 if (cflag & PARODD) {
2685 lParity = LCR_PAR_MARK;
2686 dbg("%s - parity = mark", __FUNCTION__);
2687 } else {
2688 lParity = LCR_PAR_SPACE;
2689 dbg("%s - parity = space", __FUNCTION__);
2690 }
2691 } else if (cflag & PARODD) {
2692 lParity = LCR_PAR_ODD;
2693 dbg("%s - parity = odd", __FUNCTION__);
2694 } else {
2695 lParity = LCR_PAR_EVEN;
2696 dbg("%s - parity = even", __FUNCTION__);
2697 }
2698 } else {
2699 dbg("%s - parity = none", __FUNCTION__);
2700 }
2701
2702 if (cflag & CSTOPB) {
2703 lStop = LCR_STOP_2;
2704 dbg("%s - stop bits = 2", __FUNCTION__);
2705 } else {
2706 lStop = LCR_STOP_1;
2707 dbg("%s - stop bits = 1", __FUNCTION__);
2708 }
2709
2710 /* figure out the flow control settings */
2711 rxFlow = txFlow = 0x00;
2712 if (cflag & CRTSCTS) {
2713 rxFlow |= IOSP_RX_FLOW_RTS;
2714 txFlow |= IOSP_TX_FLOW_CTS;
2715 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2716 } else {
2717 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2718 }
2719
2720 /* if we are implementing XON/XOFF, set the start and stop character in the device */
2721 if (I_IXOFF(tty) || I_IXON(tty)) {
2722 unsigned char stop_char = STOP_CHAR(tty);
2723 unsigned char start_char = START_CHAR(tty);
2724
2725 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2726 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2727
2728 /* if we are implementing INBOUND XON/XOFF */
2729 if (I_IXOFF(tty)) {
2730 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2731 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2732 } else {
2733 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2734 }
2735
2736 /* if we are implementing OUTBOUND XON/XOFF */
2737 if (I_IXON(tty)) {
2738 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2739 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2740 } else {
2741 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2742 }
2743 }
2744
2745 /* Set flow control to the configured value */
2746 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2747 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2748
2749
2750 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2751 edge_port->shadowLCR |= (lData | lParity | lStop);
2752
2753 edge_port->validDataMask = mask;
2754
2755 /* Send the updated LCR value to the EdgePort */
2756 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2757 if (status != 0) {
2758 return;
2759 }
2760
2761 /* set up the MCR register and send it to the EdgePort */
2762 edge_port->shadowMCR = MCR_MASTER_IE;
2763 if (cflag & CBAUD) {
2764 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2765 }
2766 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2767 if (status != 0) {
2768 return;
2769 }
2770
2771 /* Determine divisor based on baud rate */
2772 baud = tty_get_baud_rate(tty);
2773 if (!baud) {
2774 /* pick a default, any default... */
2775 baud = 9600;
2776 }
2777
2778 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2779 status = send_cmd_write_baud_rate (edge_port, baud);
2780
2781 return;
2782 }
2783
2784
2785 /****************************************************************************
2786 * unicode_to_ascii
2787 * Turns a string from Unicode into ASCII.
2788 * Doesn't do a good job with any characters that are outside the normal
2789 * ASCII range, but it's only for debugging...
2790 * NOTE: expects the unicode in LE format
2791 ****************************************************************************/
2792 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size)
2793 {
2794 int i;
2795
2796 if (unicode_size <= 0)
2797 return;
2798
2799 for (i = 0; i < unicode_size; ++i)
2800 string[i] = (char)(le16_to_cpu(unicode[i]));
2801 string[unicode_size] = 0x00;
2802 }
2803
2804
2805 /****************************************************************************
2806 * get_manufacturing_desc
2807 * reads in the manufacturing descriptor and stores it into the serial
2808 * structure.
2809 ****************************************************************************/
2810 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2811 {
2812 int response;
2813
2814 dbg("getting manufacturer descriptor");
2815
2816 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2817 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2818 (__u8 *)(&edge_serial->manuf_descriptor));
2819
2820 if (response < 1) {
2821 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2822 } else {
2823 char string[30];
2824 dbg("**Manufacturer Descriptor");
2825 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize);
2826 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize);
2827 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev);
2828 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev);
2829 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts);
2830 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2831 unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1);
2832 dbg(" SerialNumber: %s", string);
2833 unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1);
2834 dbg(" AssemblyNumber: %s", string);
2835 unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1);
2836 dbg(" OemAssyNumber: %s", string);
2837 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType);
2838 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid);
2839 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig);
2840 }
2841 }
2842
2843
2844 /****************************************************************************
2845 * get_boot_desc
2846 * reads in the bootloader descriptor and stores it into the serial
2847 * structure.
2848 ****************************************************************************/
2849 static void get_boot_desc (struct edgeport_serial *edge_serial)
2850 {
2851 int response;
2852
2853 dbg("getting boot descriptor");
2854
2855 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2856 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2857 (__u8 *)(&edge_serial->boot_descriptor));
2858
2859 if (response < 1) {
2860 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2861 } else {
2862 dbg("**Boot Descriptor:");
2863 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2864 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion);
2865 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion);
2866 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2867 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2868 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0);
2869 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1);
2870 }
2871 }
2872
2873
2874 /****************************************************************************
2875 * load_application_firmware
2876 * This is called to load the application firmware to the device
2877 ****************************************************************************/
2878 static void load_application_firmware (struct edgeport_serial *edge_serial)
2879 {
2880 struct edge_firmware_image_record *record;
2881 unsigned char *firmware;
2882 unsigned char *FirmwareImage;
2883 int ImageSize;
2884 int response;
2885
2886
2887 switch (edge_serial->product_info.iDownloadFile) {
2888 case EDGE_DOWNLOAD_FILE_I930:
2889 dbg("downloading firmware version (930) %d.%d.%d",
2890 OperationalCodeImageVersion_GEN1.MajorVersion,
2891 OperationalCodeImageVersion_GEN1.MinorVersion,
2892 OperationalCodeImageVersion_GEN1.BuildNumber);
2893 firmware = &OperationalCodeImage_GEN1[0];
2894 FirmwareImage = &OperationalCodeImage_GEN1[0];
2895 ImageSize = sizeof(OperationalCodeImage_GEN1);
2896 break;
2897
2898 case EDGE_DOWNLOAD_FILE_80251:
2899 dbg("downloading firmware version (80251) %d.%d.%d",
2900 OperationalCodeImageVersion_GEN2.MajorVersion,
2901 OperationalCodeImageVersion_GEN2.MinorVersion,
2902 OperationalCodeImageVersion_GEN2.BuildNumber);
2903 firmware = &OperationalCodeImage_GEN2[0];
2904 FirmwareImage = &OperationalCodeImage_GEN2[0];
2905 ImageSize = sizeof(OperationalCodeImage_GEN2);
2906 break;
2907
2908 case EDGE_DOWNLOAD_FILE_NONE:
2909 dbg ("No download file specified, skipping download\n");
2910 return;
2911
2912 default:
2913 return;
2914 }
2915
2916
2917 for (;;) {
2918 record = (struct edge_firmware_image_record *)firmware;
2919 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2920 if (response < 0) {
2921 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));
2922 break;
2923 }
2924 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2925 if (firmware >= &FirmwareImage[ImageSize]) {
2926 break;
2927 }
2928 }
2929
2930 dbg("sending exec_dl_code");
2931 response = usb_control_msg (edge_serial->serial->dev,
2932 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2933 USB_REQUEST_ION_EXEC_DL_CODE,
2934 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2935
2936 return;
2937 }
2938
2939
2940 /****************************************************************************
2941 * edge_startup
2942 ****************************************************************************/
2943 static int edge_startup (struct usb_serial *serial)
2944 {
2945 struct edgeport_serial *edge_serial;
2946 struct edgeport_port *edge_port;
2947 struct usb_device *dev;
2948 int i;
2949
2950 dev = serial->dev;
2951
2952 /* create our private serial structure */
2953 edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL);
2954 if (edge_serial == NULL) {
2955 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2956 return -ENOMEM;
2957 }
2958 memset (edge_serial, 0, sizeof(struct edgeport_serial));
2959 spin_lock_init(&edge_serial->es_lock);
2960 edge_serial->serial = serial;
2961 usb_set_serial_data(serial, edge_serial);
2962
2963 /* get the name for the device from the device */
2964 if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) {
2965 edge_serial->name[i-1] = ' ';
2966 }
2967
2968 get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]);
2969
2970 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2971
2972 /* get the manufacturing descriptor for this device */
2973 get_manufacturing_desc (edge_serial);
2974
2975 /* get the boot descriptor */
2976 get_boot_desc (edge_serial);
2977
2978 get_product_info(edge_serial);
2979
2980 /* set the number of ports from the manufacturing description */
2981 /* serial->num_ports = serial->product_info.NumPorts; */
2982 if (edge_serial->product_info.NumPorts != serial->num_ports) {
2983 warn("%s - Device Reported %d serial ports vs core "
2984 "thinking we have %d ports, email greg@kroah.com this info.",
2985 __FUNCTION__, edge_serial->product_info.NumPorts,
2986 serial->num_ports);
2987 }
2988
2989 dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2990
2991 /* now load the application firmware into this device */
2992 load_application_firmware (edge_serial);
2993
2994 dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
2995
2996 /* Check current Edgeport EEPROM and update if necessary */
2997 update_edgeport_E2PROM (edge_serial);
2998
2999 dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
3000
3001 /* set the configuration to use #1 */
3002 // dbg("set_configuration 1");
3003 // usb_set_configuration (dev, 1);
3004
3005 /* we set up the pointers to the endpoints in the edge_open function,
3006 * as the structures aren't created yet. */
3007
3008 /* set up our port private structures */
3009 for (i = 0; i < serial->num_ports; ++i) {
3010 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
3011 if (edge_port == NULL) {
3012 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
3013 usb_set_serial_data(serial, NULL);
3014 kfree(edge_serial);
3015 return -ENOMEM;
3016 }
3017 memset (edge_port, 0, sizeof(struct edgeport_port));
3018 spin_lock_init(&edge_port->ep_lock);
3019 edge_port->port = serial->port[i];
3020 usb_set_serial_port_data(serial->port[i], edge_port);
3021 }
3022
3023 return 0;
3024 }
3025
3026
3027 /****************************************************************************
3028 * edge_shutdown
3029 * This function is called whenever the device is removed from the usb bus.
3030 ****************************************************************************/
3031 static void edge_shutdown (struct usb_serial *serial)
3032 {
3033 int i;
3034
3035 dbg("%s", __FUNCTION__);
3036
3037 /* stop reads and writes on all ports */
3038 for (i=0; i < serial->num_ports; ++i) {
3039 kfree (usb_get_serial_port_data(serial->port[i]));
3040 usb_set_serial_port_data(serial->port[i], NULL);
3041 }
3042 kfree (usb_get_serial_data(serial));
3043 usb_set_serial_data(serial, NULL);
3044 }
3045
3046
3047 /****************************************************************************
3048 * edgeport_init
3049 * This is called by the module subsystem, or on startup to initialize us
3050 ****************************************************************************/
3051 static int __init edgeport_init(void)
3052 {
3053 int retval;
3054
3055 retval = usb_serial_register(&edgeport_2port_device);
3056 if (retval)
3057 goto failed_2port_device_register;
3058 retval = usb_serial_register(&edgeport_4port_device);
3059 if (retval)
3060 goto failed_4port_device_register;
3061 retval = usb_serial_register(&edgeport_8port_device);
3062 if (retval)
3063 goto failed_8port_device_register;
3064 retval = usb_register(&io_driver);
3065 if (retval)
3066 goto failed_usb_register;
3067 info(DRIVER_DESC " " DRIVER_VERSION);
3068 return 0;
3069
3070 failed_usb_register:
3071 usb_serial_deregister(&edgeport_8port_device);
3072 failed_8port_device_register:
3073 usb_serial_deregister(&edgeport_4port_device);
3074 failed_4port_device_register:
3075 usb_serial_deregister(&edgeport_2port_device);
3076 failed_2port_device_register:
3077 return retval;
3078 }
3079
3080
3081 /****************************************************************************
3082 * edgeport_exit
3083 * Called when the driver is about to be unloaded.
3084 ****************************************************************************/
3085 static void __exit edgeport_exit (void)
3086 {
3087 usb_deregister (&io_driver);
3088 usb_serial_deregister (&edgeport_2port_device);
3089 usb_serial_deregister (&edgeport_4port_device);
3090 usb_serial_deregister (&edgeport_8port_device);
3091 }
3092
3093 module_init(edgeport_init);
3094 module_exit(edgeport_exit);
3095
3096 /* Module information */
3097 MODULE_AUTHOR( DRIVER_AUTHOR );
3098 MODULE_DESCRIPTION( DRIVER_DESC );
3099 MODULE_LICENSE("GPL");
3100
3101 module_param(debug, bool, S_IRUGO | S_IWUSR);
3102 MODULE_PARM_DESC(debug, "Debug enabled or not");
3103
3104 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3105 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
Verdex Pro support