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Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / io_edgeport.c
blobe35b5adcd5fe71821b8a5f0ff03ed0ebb782d4ba
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 if (urb->transfer_buffer != NULL) {
955 kfree(urb->transfer_buffer);
956 }
957
958 /* Free the command urb */
959 usb_free_urb (urb);
960
961 if (status) {
962 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
963 return;
964 }
965
966 /* Get pointer to tty */
967 tty = edge_port->port->tty;
968
969 /* tell the tty driver that something has changed */
970 if (tty && edge_port->open)
971 tty_wakeup(tty);
972
973 /* we have completed the command */
974 edge_port->commandPending = FALSE;
975 wake_up(&edge_port->wait_command);
976 }
977
978
979 /*****************************************************************************
980 * Driver tty interface functions
981 *****************************************************************************/
982
983 /*****************************************************************************
984 * SerialOpen
985 * this function is called by the tty driver when a port is opened
986 * If successful, we return 0
987 * Otherwise we return a negative error number.
988 *****************************************************************************/
989 static int edge_open (struct usb_serial_port *port, struct file * filp)
990 {
991 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
992 struct usb_serial *serial;
993 struct edgeport_serial *edge_serial;
994 int response;
995
996 dbg("%s - port %d", __FUNCTION__, port->number);
997
998 if (edge_port == NULL)
999 return -ENODEV;
1000
1001 if (port->tty)
1002 port->tty->low_latency = low_latency;
1003
1004 /* see if we've set up our endpoint info yet (can't set it up in edge_startup
1005 as the structures were not set up at that time.) */
1006 serial = port->serial;
1007 edge_serial = usb_get_serial_data(serial);
1008 if (edge_serial == NULL) {
1009 return -ENODEV;
1010 }
1011 if (edge_serial->interrupt_in_buffer == NULL) {
1012 struct usb_serial_port *port0 = serial->port[0];
1013
1014 /* not set up yet, so do it now */
1015 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
1016 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
1017 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
1018 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
1019 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
1020 edge_serial->read_urb = port0->read_urb;
1021 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
1022
1023 /* set up our interrupt urb */
1024 usb_fill_int_urb(edge_serial->interrupt_read_urb,
1025 serial->dev,
1026 usb_rcvintpipe(serial->dev,
1027 port0->interrupt_in_endpointAddress),
1028 port0->interrupt_in_buffer,
1029 edge_serial->interrupt_read_urb->transfer_buffer_length,
1030 edge_interrupt_callback, edge_serial,
1031 edge_serial->interrupt_read_urb->interval);
1032
1033 /* set up our bulk in urb */
1034 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
1035 usb_rcvbulkpipe(serial->dev,
1036 port0->bulk_in_endpointAddress),
1037 port0->bulk_in_buffer,
1038 edge_serial->read_urb->transfer_buffer_length,
1039 edge_bulk_in_callback, edge_serial);
1040 edge_serial->read_in_progress = FALSE;
1041
1042 /* start interrupt read for this edgeport
1043 * this interrupt will continue as long as the edgeport is connected */
1044 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
1045 if (response) {
1046 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
1047 }
1048 }
1049
1050 /* initialize our wait queues */
1051 init_waitqueue_head(&edge_port->wait_open);
1052 init_waitqueue_head(&edge_port->wait_chase);
1053 init_waitqueue_head(&edge_port->delta_msr_wait);
1054 init_waitqueue_head(&edge_port->wait_command);
1055
1056 /* initialize our icount structure */
1057 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1058
1059 /* initialize our port settings */
1060 edge_port->txCredits = 0; /* Can't send any data yet */
1061 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */
1062 edge_port->chaseResponsePending = FALSE;
1063
1064 /* send a open port command */
1065 edge_port->openPending = TRUE;
1066 edge_port->open = FALSE;
1067 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
1068
1069 if (response < 0) {
1070 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
1071 edge_port->openPending = FALSE;
1072 return -ENODEV;
1073 }
1074
1075 /* now wait for the port to be completely opened */
1076 wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT);
1077
1078 if (edge_port->open == FALSE) {
1079 /* open timed out */
1080 dbg("%s - open timedout", __FUNCTION__);
1081 edge_port->openPending = FALSE;
1082 return -ENODEV;
1083 }
1084
1085 /* create the txfifo */
1086 edge_port->txfifo.head = 0;
1087 edge_port->txfifo.tail = 0;
1088 edge_port->txfifo.count = 0;
1089 edge_port->txfifo.size = edge_port->maxTxCredits;
1090 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
1091
1092 if (!edge_port->txfifo.fifo) {
1093 dbg("%s - no memory", __FUNCTION__);
1094 edge_close (port, filp);
1095 return -ENOMEM;
1096 }
1097
1098 /* Allocate a URB for the write */
1099 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
1100 edge_port->write_in_progress = FALSE;
1101
1102 if (!edge_port->write_urb) {
1103 dbg("%s - no memory", __FUNCTION__);
1104 edge_close (port, filp);
1105 return -ENOMEM;
1106 }
1107
1108 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
1109
1110 dbg("%s exited", __FUNCTION__);
1111
1112 return 0;
1113 }
1114
1115
1116 /************************************************************************
1117 *
1118 * block_until_chase_response
1119 *
1120 * This function will block the close until one of the following:
1121 * 1. Response to our Chase comes from Edgeport
1122 * 2. A timout of 10 seconds without activity has expired
1123 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
1124 *
1125 ************************************************************************/
1126 static void block_until_chase_response(struct edgeport_port *edge_port)
1127 {
1128 DEFINE_WAIT(wait);
1129 __u16 lastCredits;
1130 int timeout = 1*HZ;
1131 int loop = 10;
1132
1133 while (1) {
1134 // Save Last credits
1135 lastCredits = edge_port->txCredits;
1136
1137 // Did we get our Chase response
1138 if (edge_port->chaseResponsePending == FALSE) {
1139 dbg("%s - Got Chase Response", __FUNCTION__);
1140
1141 // did we get all of our credit back?
1142 if (edge_port->txCredits == edge_port->maxTxCredits ) {
1143 dbg("%s - Got all credits", __FUNCTION__);
1144 return;
1145 }
1146 }
1147
1148 // Block the thread for a while
1149 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
1150 schedule_timeout(timeout);
1151 finish_wait(&edge_port->wait_chase, &wait);
1152
1153 if (lastCredits == edge_port->txCredits) {
1154 // No activity.. count down.
1155 loop--;
1156 if (loop == 0) {
1157 edge_port->chaseResponsePending = FALSE;
1158 dbg("%s - Chase TIMEOUT", __FUNCTION__);
1159 return;
1160 }
1161 } else {
1162 // Reset timout value back to 10 seconds
1163 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
1164 loop = 10;
1165 }
1166 }
1167 }
1168
1169
1170 /************************************************************************
1171 *
1172 * block_until_tx_empty
1173 *
1174 * This function will block the close until one of the following:
1175 * 1. TX count are 0
1176 * 2. The edgeport has stopped
1177 * 3. A timout of 3 seconds without activity has expired
1178 *
1179 ************************************************************************/
1180 static void block_until_tx_empty (struct edgeport_port *edge_port)
1181 {
1182 DEFINE_WAIT(wait);
1183 struct TxFifo *fifo = &edge_port->txfifo;
1184 __u32 lastCount;
1185 int timeout = HZ/10;
1186 int loop = 30;
1187
1188 while (1) {
1189 // Save Last count
1190 lastCount = fifo->count;
1191
1192 // Is the Edgeport Buffer empty?
1193 if (lastCount == 0) {
1194 dbg("%s - TX Buffer Empty", __FUNCTION__);
1195 return;
1196 }
1197
1198 // Block the thread for a while
1199 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
1200 schedule_timeout(timeout);
1201 finish_wait(&edge_port->wait_chase, &wait);
1202
1203 dbg("%s wait", __FUNCTION__);
1204
1205 if (lastCount == fifo->count) {
1206 // No activity.. count down.
1207 loop--;
1208 if (loop == 0) {
1209 dbg("%s - TIMEOUT", __FUNCTION__);
1210 return;
1211 }
1212 } else {
1213 // Reset timout value back to seconds
1214 loop = 30;
1215 }
1216 }
1217 }
1218
1219
1220 /*****************************************************************************
1221 * edge_close
1222 * this function is called by the tty driver when a port is closed
1223 *****************************************************************************/
1224 static void edge_close (struct usb_serial_port *port, struct file * filp)
1225 {
1226 struct edgeport_serial *edge_serial;
1227 struct edgeport_port *edge_port;
1228 int status;
1229
1230 dbg("%s - port %d", __FUNCTION__, port->number);
1231
1232 edge_serial = usb_get_serial_data(port->serial);
1233 edge_port = usb_get_serial_port_data(port);
1234 if ((edge_serial == NULL) || (edge_port == NULL))
1235 return;
1236
1237 // block until tx is empty
1238 block_until_tx_empty(edge_port);
1239
1240 edge_port->closePending = TRUE;
1241
1242 /* flush and chase */
1243 edge_port->chaseResponsePending = TRUE;
1244
1245 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1246 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1247 if (status == 0) {
1248 // block until chase finished
1249 block_until_chase_response(edge_port);
1250 } else {
1251 edge_port->chaseResponsePending = FALSE;
1252 }
1253
1254 /* close the port */
1255 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1256 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1257
1258 //port->close = TRUE;
1259 edge_port->closePending = FALSE;
1260 edge_port->open = FALSE;
1261 edge_port->openPending = FALSE;
1262
1263 if (edge_port->write_urb) {
1264 usb_kill_urb(edge_port->write_urb);
1265 }
1266
1267 if (edge_port->write_urb) {
1268 /* if this urb had a transfer buffer already (old transfer) free it */
1269 if (edge_port->write_urb->transfer_buffer != NULL) {
1270 kfree(edge_port->write_urb->transfer_buffer);
1271 }
1272 usb_free_urb (edge_port->write_urb);
1273 edge_port->write_urb = NULL;
1274 }
1275 if (edge_port->txfifo.fifo) {
1276 kfree(edge_port->txfifo.fifo);
1277 edge_port->txfifo.fifo = NULL;
1278 }
1279
1280 dbg("%s exited", __FUNCTION__);
1281 }
1282
1283 /*****************************************************************************
1284 * SerialWrite
1285 * this function is called by the tty driver when data should be written to
1286 * the port.
1287 * If successful, we return the number of bytes written, otherwise we return
1288 * a negative error number.
1289 *****************************************************************************/
1290 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1291 {
1292 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1293 struct TxFifo *fifo;
1294 int copySize;
1295 int bytesleft;
1296 int firsthalf;
1297 int secondhalf;
1298 unsigned long flags;
1299
1300 dbg("%s - port %d", __FUNCTION__, port->number);
1301
1302 if (edge_port == NULL)
1303 return -ENODEV;
1304
1305 // get a pointer to the Tx fifo
1306 fifo = &edge_port->txfifo;
1307
1308 spin_lock_irqsave(&edge_port->ep_lock, flags);
1309
1310 // calculate number of bytes to put in fifo
1311 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1312
1313 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__,
1314 port->number, count, edge_port->txCredits - fifo->count, copySize);
1315
1316 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1317 if (copySize == 0) {
1318 dbg("%s - copySize = Zero", __FUNCTION__);
1319 goto finish_write;
1320 }
1321
1322 // queue the data
1323 // since we can never overflow the buffer we do not have to check for full condition
1324
1325 // the copy is done is two parts -- first fill to the end of the buffer
1326 // then copy the reset from the start of the buffer
1327
1328 bytesleft = fifo->size - fifo->head;
1329 firsthalf = min (bytesleft, copySize);
1330 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1331
1332 /* now copy our data */
1333 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1334 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]);
1335
1336 // update the index and size
1337 fifo->head += firsthalf;
1338 fifo->count += firsthalf;
1339
1340 // wrap the index
1341 if (fifo->head == fifo->size) {
1342 fifo->head = 0;
1343 }
1344
1345 secondhalf = copySize-firsthalf;
1346
1347 if (secondhalf) {
1348 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1349 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1350 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1351 // update the index and size
1352 fifo->count += secondhalf;
1353 fifo->head += secondhalf;
1354 // No need to check for wrap since we can not get to end of fifo in this part
1355 }
1356
1357 finish_write:
1358 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1359
1360 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1361
1362 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1363
1364 return copySize;
1365 }
1366
1367
1368 /************************************************************************
1369 *
1370 * send_more_port_data()
1371 *
1372 * This routine attempts to write additional UART transmit data
1373 * to a port over the USB bulk pipe. It is called (1) when new
1374 * data has been written to a port's TxBuffer from higher layers
1375 * (2) when the peripheral sends us additional TxCredits indicating
1376 * that it can accept more Tx data for a given port; and (3) when
1377 * a bulk write completes successfully and we want to see if we
1378 * can transmit more.
1379 *
1380 ************************************************************************/
1381 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1382 {
1383 struct TxFifo *fifo = &edge_port->txfifo;
1384 struct urb *urb;
1385 unsigned char *buffer;
1386 int status;
1387 int count;
1388 int bytesleft;
1389 int firsthalf;
1390 int secondhalf;
1391 unsigned long flags;
1392
1393 dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1394
1395 spin_lock_irqsave(&edge_port->ep_lock, flags);
1396
1397 if (edge_port->write_in_progress ||
1398 !edge_port->open ||
1399 (fifo->count == 0)) {
1400 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1401 goto exit_send;
1402 }
1403
1404 // since the amount of data in the fifo will always fit into the
1405 // edgeport buffer we do not need to check the write length
1406
1407 // Do we have enough credits for this port to make it worthwhile
1408 // to bother queueing a write. If it's too small, say a few bytes,
1409 // it's better to wait for more credits so we can do a larger
1410 // write.
1411 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1412 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1413 goto exit_send;
1414 }
1415
1416 // lock this write
1417 edge_port->write_in_progress = TRUE;
1418
1419 // get a pointer to the write_urb
1420 urb = edge_port->write_urb;
1421
1422 /* if this urb had a transfer buffer already (old transfer) free it */
1423 if (urb->transfer_buffer != NULL) {
1424 kfree(urb->transfer_buffer);
1425 urb->transfer_buffer = NULL;
1426 }
1427
1428 /* build the data header for the buffer and port that we are about to send out */
1429 count = fifo->count;
1430 buffer = kmalloc (count+2, GFP_ATOMIC);
1431 if (buffer == NULL) {
1432 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1433 edge_port->write_in_progress = FALSE;
1434 goto exit_send;
1435 }
1436 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1437 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1438
1439 /* now copy our data */
1440 bytesleft = fifo->size - fifo->tail;
1441 firsthalf = min (bytesleft, count);
1442 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1443 fifo->tail += firsthalf;
1444 fifo->count -= firsthalf;
1445 if (fifo->tail == fifo->size) {
1446 fifo->tail = 0;
1447 }
1448
1449 secondhalf = count-firsthalf;
1450 if (secondhalf) {
1451 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1452 fifo->tail += secondhalf;
1453 fifo->count -= secondhalf;
1454 }
1455
1456 if (count)
1457 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1458
1459 /* fill up the urb with all of our data and submit it */
1460 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1461 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1462 buffer, count+2, edge_bulk_out_data_callback, edge_port);
1463
1464 /* decrement the number of credits we have by the number we just sent */
1465 edge_port->txCredits -= count;
1466 edge_port->icount.tx += count;
1467
1468 urb->dev = edge_serial->serial->dev;
1469 status = usb_submit_urb(urb, GFP_ATOMIC);
1470 if (status) {
1471 /* something went wrong */
1472 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1473 edge_port->write_in_progress = FALSE;
1474
1475 /* revert the credits as something bad happened. */
1476 edge_port->txCredits += count;
1477 edge_port->icount.tx -= count;
1478 }
1479 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1480
1481 exit_send:
1482 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1483 }
1484
1485
1486 /*****************************************************************************
1487 * edge_write_room
1488 * this function is called by the tty driver when it wants to know how many
1489 * bytes of data we can accept for a specific port.
1490 * If successful, we return the amount of room that we have for this port
1491 * (the txCredits),
1492 * Otherwise we return a negative error number.
1493 *****************************************************************************/
1494 static int edge_write_room (struct usb_serial_port *port)
1495 {
1496 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1497 int room;
1498 unsigned long flags;
1499
1500 dbg("%s", __FUNCTION__);
1501
1502 if (edge_port == NULL)
1503 return -ENODEV;
1504 if (edge_port->closePending == TRUE)
1505 return -ENODEV;
1506
1507 dbg("%s - port %d", __FUNCTION__, port->number);
1508
1509 if (!edge_port->open) {
1510 dbg("%s - port not opened", __FUNCTION__);
1511 return -EINVAL;
1512 }
1513
1514 // total of both buffers is still txCredit
1515 spin_lock_irqsave(&edge_port->ep_lock, flags);
1516 room = edge_port->txCredits - edge_port->txfifo.count;
1517 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1518
1519 dbg("%s - returns %d", __FUNCTION__, room);
1520 return room;
1521 }
1522
1523
1524 /*****************************************************************************
1525 * edge_chars_in_buffer
1526 * this function is called by the tty driver when it wants to know how many
1527 * bytes of data we currently have outstanding in the port (data that has
1528 * been written, but hasn't made it out the port yet)
1529 * If successful, we return the number of bytes left to be written in the
1530 * system,
1531 * Otherwise we return a negative error number.
1532 *****************************************************************************/
1533 static int edge_chars_in_buffer (struct usb_serial_port *port)
1534 {
1535 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1536 int num_chars;
1537 unsigned long flags;
1538
1539 dbg("%s", __FUNCTION__);
1540
1541 if (edge_port == NULL)
1542 return -ENODEV;
1543 if (edge_port->closePending == TRUE)
1544 return -ENODEV;
1545
1546 if (!edge_port->open) {
1547 dbg("%s - port not opened", __FUNCTION__);
1548 return -EINVAL;
1549 }
1550
1551 spin_lock_irqsave(&edge_port->ep_lock, flags);
1552 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1553 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1554 if (num_chars) {
1555 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1556 }
1557
1558 return num_chars;
1559 }
1560
1561
1562 /*****************************************************************************
1563 * SerialThrottle
1564 * this function is called by the tty driver when it wants to stop the data
1565 * being read from the port.
1566 *****************************************************************************/
1567 static void edge_throttle (struct usb_serial_port *port)
1568 {
1569 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1570 struct tty_struct *tty;
1571 int status;
1572
1573 dbg("%s - port %d", __FUNCTION__, port->number);
1574
1575 if (edge_port == NULL)
1576 return;
1577
1578 if (!edge_port->open) {
1579 dbg("%s - port not opened", __FUNCTION__);
1580 return;
1581 }
1582
1583 tty = port->tty;
1584 if (!tty) {
1585 dbg ("%s - no tty available", __FUNCTION__);
1586 return;
1587 }
1588
1589 /* if we are implementing XON/XOFF, send the stop character */
1590 if (I_IXOFF(tty)) {
1591 unsigned char stop_char = STOP_CHAR(tty);
1592 status = edge_write (port, &stop_char, 1);
1593 if (status <= 0) {
1594 return;
1595 }
1596 }
1597
1598 /* if we are implementing RTS/CTS, toggle that line */
1599 if (tty->termios->c_cflag & CRTSCTS) {
1600 edge_port->shadowMCR &= ~MCR_RTS;
1601 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1602 if (status != 0) {
1603 return;
1604 }
1605 }
1606
1607 return;
1608 }
1609
1610
1611 /*****************************************************************************
1612 * edge_unthrottle
1613 * this function is called by the tty driver when it wants to resume the data
1614 * being read from the port (called after SerialThrottle is called)
1615 *****************************************************************************/
1616 static void edge_unthrottle (struct usb_serial_port *port)
1617 {
1618 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1619 struct tty_struct *tty;
1620 int status;
1621
1622 dbg("%s - port %d", __FUNCTION__, port->number);
1623
1624 if (edge_port == NULL)
1625 return;
1626
1627 if (!edge_port->open) {
1628 dbg("%s - port not opened", __FUNCTION__);
1629 return;
1630 }
1631
1632 tty = port->tty;
1633 if (!tty) {
1634 dbg ("%s - no tty available", __FUNCTION__);
1635 return;
1636 }
1637
1638 /* if we are implementing XON/XOFF, send the start character */
1639 if (I_IXOFF(tty)) {
1640 unsigned char start_char = START_CHAR(tty);
1641 status = edge_write (port, &start_char, 1);
1642 if (status <= 0) {
1643 return;
1644 }
1645 }
1646
1647 /* if we are implementing RTS/CTS, toggle that line */
1648 if (tty->termios->c_cflag & CRTSCTS) {
1649 edge_port->shadowMCR |= MCR_RTS;
1650 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1651 if (status != 0) {
1652 return;
1653 }
1654 }
1655
1656 return;
1657 }
1658
1659
1660 /*****************************************************************************
1661 * SerialSetTermios
1662 * this function is called by the tty driver when it wants to change the termios structure
1663 *****************************************************************************/
1664 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1665 {
1666 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1667 struct tty_struct *tty = port->tty;
1668 unsigned int cflag;
1669
1670 if (!port->tty || !port->tty->termios) {
1671 dbg ("%s - no tty or termios", __FUNCTION__);
1672 return;
1673 }
1674
1675 cflag = tty->termios->c_cflag;
1676 /* check that they really want us to change something */
1677 if (old_termios) {
1678 if (cflag == old_termios->c_cflag &&
1679 tty->termios->c_iflag == old_termios->c_iflag) {
1680 dbg("%s - nothing to change", __FUNCTION__);
1681 return;
1682 }
1683 }
1684
1685 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1686 tty->termios->c_cflag, tty->termios->c_iflag);
1687 if (old_termios) {
1688 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1689 old_termios->c_cflag, old_termios->c_iflag);
1690 }
1691
1692 dbg("%s - port %d", __FUNCTION__, port->number);
1693
1694 if (edge_port == NULL)
1695 return;
1696
1697 if (!edge_port->open) {
1698 dbg("%s - port not opened", __FUNCTION__);
1699 return;
1700 }
1701
1702 /* change the port settings to the new ones specified */
1703 change_port_settings (edge_port, old_termios);
1704
1705 return;
1706 }
1707
1708
1709 /*****************************************************************************
1710 * get_lsr_info - get line status register info
1711 *
1712 * Purpose: Let user call ioctl() to get info when the UART physically
1713 * is emptied. On bus types like RS485, the transmitter must
1714 * release the bus after transmitting. This must be done when
1715 * the transmit shift register is empty, not be done when the
1716 * transmit holding register is empty. This functionality
1717 * allows an RS485 driver to be written in user space.
1718 *****************************************************************************/
1719 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1720 {
1721 unsigned int result = 0;
1722 unsigned long flags;
1723
1724 spin_lock_irqsave(&edge_port->ep_lock, flags);
1725 if (edge_port->maxTxCredits == edge_port->txCredits &&
1726 edge_port->txfifo.count == 0) {
1727 dbg("%s -- Empty", __FUNCTION__);
1728 result = TIOCSER_TEMT;
1729 }
1730 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1731
1732 if (copy_to_user(value, &result, sizeof(int)))
1733 return -EFAULT;
1734 return 0;
1735 }
1736
1737 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1738 {
1739 unsigned int result = 0;
1740 struct tty_struct *tty = edge_port->port->tty;
1741
1742 if (!tty)
1743 return -ENOIOCTLCMD;
1744
1745 result = tty->read_cnt;
1746
1747 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result);
1748 if (copy_to_user(value, &result, sizeof(int)))
1749 return -EFAULT;
1750 //return 0;
1751 return -ENOIOCTLCMD;
1752 }
1753
1754 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1755 {
1756 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1757 unsigned int mcr;
1758
1759 dbg("%s - port %d", __FUNCTION__, port->number);
1760
1761 mcr = edge_port->shadowMCR;
1762 if (set & TIOCM_RTS)
1763 mcr |= MCR_RTS;
1764 if (set & TIOCM_DTR)
1765 mcr |= MCR_DTR;
1766 if (set & TIOCM_LOOP)
1767 mcr |= MCR_LOOPBACK;
1768
1769 if (clear & TIOCM_RTS)
1770 mcr &= ~MCR_RTS;
1771 if (clear & TIOCM_DTR)
1772 mcr &= ~MCR_DTR;
1773 if (clear & TIOCM_LOOP)
1774 mcr &= ~MCR_LOOPBACK;
1775
1776 edge_port->shadowMCR = mcr;
1777
1778 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1779
1780 return 0;
1781 }
1782
1783 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1784 {
1785 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1786 unsigned int result = 0;
1787 unsigned int msr;
1788 unsigned int mcr;
1789
1790 dbg("%s - port %d", __FUNCTION__, port->number);
1791
1792 msr = edge_port->shadowMSR;
1793 mcr = edge_port->shadowMCR;
1794 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1795 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1796 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1797 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1798 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1799 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1800
1801
1802 dbg("%s -- %x", __FUNCTION__, result);
1803
1804 return result;
1805 }
1806
1807 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1808 {
1809 struct serial_struct tmp;
1810
1811 if (!retinfo)
1812 return -EFAULT;
1813
1814 memset(&tmp, 0, sizeof(tmp));
1815
1816 tmp.type = PORT_16550A;
1817 tmp.line = edge_port->port->serial->minor;
1818 tmp.port = edge_port->port->number;
1819 tmp.irq = 0;
1820 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1821 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1822 tmp.baud_base = 9600;
1823 tmp.close_delay = 5*HZ;
1824 tmp.closing_wait = 30*HZ;
1825 // tmp.custom_divisor = state->custom_divisor;
1826 // tmp.hub6 = state->hub6;
1827 // tmp.io_type = state->io_type;
1828
1829 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1830 return -EFAULT;
1831 return 0;
1832 }
1833
1834
1835
1836 /*****************************************************************************
1837 * SerialIoctl
1838 * this function handles any ioctl calls to the driver
1839 *****************************************************************************/
1840 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1841 {
1842 DEFINE_WAIT(wait);
1843 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1844 struct async_icount cnow;
1845 struct async_icount cprev;
1846 struct serial_icounter_struct icount;
1847
1848 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1849
1850 switch (cmd) {
1851 // return number of bytes available
1852 case TIOCINQ:
1853 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1854 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1855 break;
1856
1857 case TIOCSERGETLSR:
1858 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1859 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1860 return 0;
1861
1862 case TIOCGSERIAL:
1863 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1864 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1865
1866 case TIOCSSERIAL:
1867 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1868 break;
1869
1870 case TIOCMIWAIT:
1871 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1872 cprev = edge_port->icount;
1873 while (1) {
1874 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1875 schedule();
1876 finish_wait(&edge_port->delta_msr_wait, &wait);
1877 /* see if a signal did it */
1878 if (signal_pending(current))
1879 return -ERESTARTSYS;
1880 cnow = edge_port->icount;
1881 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1882 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1883 return -EIO; /* no change => error */
1884 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1885 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1886 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1887 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1888 return 0;
1889 }
1890 cprev = cnow;
1891 }
1892 /* NOTREACHED */
1893 break;
1894
1895 case TIOCGICOUNT:
1896 cnow = edge_port->icount;
1897 memset(&icount, 0, sizeof(icount));
1898 icount.cts = cnow.cts;
1899 icount.dsr = cnow.dsr;
1900 icount.rng = cnow.rng;
1901 icount.dcd = cnow.dcd;
1902 icount.rx = cnow.rx;
1903 icount.tx = cnow.tx;
1904 icount.frame = cnow.frame;
1905 icount.overrun = cnow.overrun;
1906 icount.parity = cnow.parity;
1907 icount.brk = cnow.brk;
1908 icount.buf_overrun = cnow.buf_overrun;
1909
1910 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx );
1911 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1912 return -EFAULT;
1913 return 0;
1914 }
1915
1916 return -ENOIOCTLCMD;
1917 }
1918
1919
1920 /*****************************************************************************
1921 * SerialBreak
1922 * this function sends a break to the port
1923 *****************************************************************************/
1924 static void edge_break (struct usb_serial_port *port, int break_state)
1925 {
1926 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1927 int status;
1928
1929 /* flush and chase */
1930 edge_port->chaseResponsePending = TRUE;
1931
1932 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1933 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1934 if (status == 0) {
1935 // block until chase finished
1936 block_until_chase_response(edge_port);
1937 } else {
1938 edge_port->chaseResponsePending = FALSE;
1939 }
1940
1941 if (break_state == -1) {
1942 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1943 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1944 } else {
1945 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1946 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1947 }
1948 if (status) {
1949 dbg("%s - error sending break set/clear command.", __FUNCTION__);
1950 }
1951
1952 return;
1953 }
1954
1955
1956 /*****************************************************************************
1957 * process_rcvd_data
1958 * this function handles the data received on the bulk in pipe.
1959 *****************************************************************************/
1960 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1961 {
1962 struct usb_serial_port *port;
1963 struct edgeport_port *edge_port;
1964 struct tty_struct *tty;
1965 __u16 lastBufferLength;
1966 __u16 rxLen;
1967
1968 dbg("%s", __FUNCTION__);
1969
1970 lastBufferLength = bufferLength + 1;
1971
1972 while (bufferLength > 0) {
1973 /* failsafe incase we get a message that we don't understand */
1974 if (lastBufferLength == bufferLength) {
1975 dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1976 break;
1977 }
1978 lastBufferLength = bufferLength;
1979
1980 switch (edge_serial->rxState) {
1981 case EXPECT_HDR1:
1982 edge_serial->rxHeader1 = *buffer;
1983 ++buffer;
1984 --bufferLength;
1985
1986 if (bufferLength == 0) {
1987 edge_serial->rxState = EXPECT_HDR2;
1988 break;
1989 }
1990 /* otherwise, drop on through */
1991
1992 case EXPECT_HDR2:
1993 edge_serial->rxHeader2 = *buffer;
1994 ++buffer;
1995 --bufferLength;
1996
1997 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1998
1999 // Process depending on whether this header is
2000 // data or status
2001
2002 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
2003 // Decode this status header and goto EXPECT_HDR1 (if we
2004 // can process the status with only 2 bytes), or goto
2005 // EXPECT_HDR3 to get the third byte.
2006
2007 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2008 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
2009
2010 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
2011 // This status needs additional bytes. Save what we have
2012 // and then wait for more data.
2013 edge_serial->rxStatusParam = edge_serial->rxHeader2;
2014
2015 edge_serial->rxState = EXPECT_HDR3;
2016 break;
2017 }
2018
2019 // We have all the header bytes, process the status now
2020 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
2021 edge_serial->rxState = EXPECT_HDR1;
2022 break;
2023 } else {
2024 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2025 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
2026
2027 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
2028
2029 //ASSERT( DevExt->RxPort < DevExt->NumPorts );
2030 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
2031
2032 if (bufferLength == 0 ) {
2033 edge_serial->rxState = EXPECT_DATA;
2034 break;
2035 }
2036 // Else, drop through
2037 }
2038
2039 case EXPECT_DATA: // Expect data
2040
2041 if (bufferLength < edge_serial->rxBytesRemaining) {
2042 rxLen = bufferLength;
2043 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer
2044 } else {
2045 // BufLen >= RxBytesRemaining
2046 rxLen = edge_serial->rxBytesRemaining;
2047 edge_serial->rxState = EXPECT_HDR1; // Start another header next time
2048 }
2049
2050 bufferLength -= rxLen;
2051 edge_serial->rxBytesRemaining -= rxLen;
2052
2053 /* spit this data back into the tty driver if this port is open */
2054 if (rxLen) {
2055 port = edge_serial->serial->port[edge_serial->rxPort];
2056 edge_port = usb_get_serial_port_data(port);
2057 if (edge_port->open) {
2058 tty = edge_port->port->tty;
2059 if (tty) {
2060 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
2061 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
2062 }
2063 edge_port->icount.rx += rxLen;
2064 }
2065 buffer += rxLen;
2066 }
2067
2068 break;
2069
2070 case EXPECT_HDR3: // Expect 3rd byte of status header
2071 edge_serial->rxHeader3 = *buffer;
2072 ++buffer;
2073 --bufferLength;
2074
2075 // We have all the header bytes, process the status now
2076 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
2077 edge_serial->rxState = EXPECT_HDR1;
2078 break;
2079
2080 }
2081 }
2082 }
2083
2084
2085 /*****************************************************************************
2086 * process_rcvd_status
2087 * this function handles the any status messages received on the bulk in pipe.
2088 *****************************************************************************/
2089 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
2090 {
2091 struct usb_serial_port *port;
2092 struct edgeport_port *edge_port;
2093 __u8 code = edge_serial->rxStatusCode;
2094
2095 /* switch the port pointer to the one being currently talked about */
2096 port = edge_serial->serial->port[edge_serial->rxPort];
2097 edge_port = usb_get_serial_port_data(port);
2098 if (edge_port == NULL) {
2099 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
2100 return;
2101 }
2102
2103 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
2104
2105 if (code == IOSP_EXT_STATUS) {
2106 switch (byte2) {
2107 case IOSP_EXT_STATUS_CHASE_RSP:
2108 // we want to do EXT status regardless of port open/closed
2109 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
2110 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
2111 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
2112 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
2113 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
2114 // like wait longer in block_until_chase_response, but for now we don't.
2115 edge_port->chaseResponsePending = FALSE;
2116 wake_up (&edge_port->wait_chase);
2117 return;
2118
2119 case IOSP_EXT_STATUS_RX_CHECK_RSP:
2120 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
2121 //Port->RxCheckRsp = TRUE;
2122 return;
2123 }
2124 }
2125
2126 if (code == IOSP_STATUS_OPEN_RSP) {
2127 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
2128 edge_port->maxTxCredits = edge_port->txCredits;
2129 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
2130 handle_new_msr (edge_port, byte2);
2131
2132 /* send the current line settings to the port so we are in sync with any further termios calls */
2133 if (edge_port->port->tty)
2134 change_port_settings (edge_port, edge_port->port->tty->termios);
2135
2136 /* we have completed the open */
2137 edge_port->openPending = FALSE;
2138 edge_port->open = TRUE;
2139 wake_up(&edge_port->wait_open);
2140 return;
2141 }
2142
2143 // If port is closed, silently discard all rcvd status. We can
2144 // have cases where buffered status is received AFTER the close
2145 // port command is sent to the Edgeport.
2146 if ((!edge_port->open ) || (edge_port->closePending)) {
2147 return;
2148 }
2149
2150 switch (code) {
2151 // Not currently sent by Edgeport
2152 case IOSP_STATUS_LSR:
2153 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2154 handle_new_lsr (edge_port, FALSE, byte2, 0);
2155 break;
2156
2157 case IOSP_STATUS_LSR_DATA:
2158 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2159 // byte2 is LSR Register
2160 // byte3 is broken data byte
2161 handle_new_lsr (edge_port, TRUE, byte2, byte3);
2162 break;
2163 //
2164 // case IOSP_EXT_4_STATUS:
2165 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2166 // break;
2167 //
2168 case IOSP_STATUS_MSR:
2169 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2170
2171 // Process this new modem status and generate appropriate
2172 // events, etc, based on the new status. This routine
2173 // also saves the MSR in Port->ShadowMsr.
2174 handle_new_msr(edge_port, byte2);
2175 break;
2176
2177 default:
2178 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
2179 break;
2180 }
2181
2182 return;
2183 }
2184
2185
2186 /*****************************************************************************
2187 * edge_tty_recv
2188 * this function passes data on to the tty flip buffer
2189 *****************************************************************************/
2190 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2191 {
2192 int cnt;
2193
2194 do {
2195 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2196 tty_flip_buffer_push(tty);
2197 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2198 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2199 __FUNCTION__, length);
2200 return;
2201 }
2202 }
2203 cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count);
2204 memcpy(tty->flip.char_buf_ptr, data, cnt);
2205 memset(tty->flip.flag_buf_ptr, 0, cnt);
2206 tty->flip.char_buf_ptr += cnt;
2207 tty->flip.flag_buf_ptr += cnt;
2208 tty->flip.count += cnt;
2209 data += cnt;
2210 length -= cnt;
2211 } while (length > 0);
2212
2213 tty_flip_buffer_push(tty);
2214 }
2215
2216
2217 /*****************************************************************************
2218 * handle_new_msr
2219 * this function handles any change to the msr register for a port.
2220 *****************************************************************************/
2221 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2222 {
2223 struct async_icount *icount;
2224
2225 dbg("%s %02x", __FUNCTION__, newMsr);
2226
2227 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2228 icount = &edge_port->icount;
2229
2230 /* update input line counters */
2231 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2232 icount->cts++;
2233 }
2234 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2235 icount->dsr++;
2236 }
2237 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2238 icount->dcd++;
2239 }
2240 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2241 icount->rng++;
2242 }
2243 wake_up_interruptible(&edge_port->delta_msr_wait);
2244 }
2245
2246 /* Save the new modem status */
2247 edge_port->shadowMSR = newMsr & 0xf0;
2248
2249 return;
2250 }
2251
2252
2253 /*****************************************************************************
2254 * handle_new_lsr
2255 * this function handles any change to the lsr register for a port.
2256 *****************************************************************************/
2257 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2258 {
2259 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2260 struct async_icount *icount;
2261
2262 dbg("%s - %02x", __FUNCTION__, newLsr);
2263
2264 edge_port->shadowLSR = lsr;
2265
2266 if (newLsr & LSR_BREAK) {
2267 //
2268 // Parity and Framing errors only count if they
2269 // occur exclusive of a break being
2270 // received.
2271 //
2272 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2273 }
2274
2275 /* Place LSR data byte into Rx buffer */
2276 if (lsrData && edge_port->port->tty)
2277 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2278
2279 /* update input line counters */
2280 icount = &edge_port->icount;
2281 if (newLsr & LSR_BREAK) {
2282 icount->brk++;
2283 }
2284 if (newLsr & LSR_OVER_ERR) {
2285 icount->overrun++;
2286 }
2287 if (newLsr & LSR_PAR_ERR) {
2288 icount->parity++;
2289 }
2290 if (newLsr & LSR_FRM_ERR) {
2291 icount->frame++;
2292 }
2293
2294 return;
2295 }
2296
2297
2298 /****************************************************************************
2299 * sram_write
2300 * writes a number of bytes to the Edgeport device's sram starting at the
2301 * given address.
2302 * If successful returns the number of bytes written, otherwise it returns
2303 * a negative error number of the problem.
2304 ****************************************************************************/
2305 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2306 {
2307 int result;
2308 __u16 current_length;
2309 unsigned char *transfer_buffer;
2310
2311 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2312
2313 transfer_buffer = kmalloc (64, GFP_KERNEL);
2314 if (!transfer_buffer) {
2315 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2316 return -ENOMEM;
2317 }
2318
2319 /* need to split these writes up into 64 byte chunks */
2320 result = 0;
2321 while (length > 0) {
2322 if (length > 64) {
2323 current_length = 64;
2324 } else {
2325 current_length = length;
2326 }
2327 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2328 memcpy (transfer_buffer, data, current_length);
2329 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2330 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2331 if (result < 0)
2332 break;
2333 length -= current_length;
2334 addr += current_length;
2335 data += current_length;
2336 }
2337
2338 kfree (transfer_buffer);
2339 return result;
2340 }
2341
2342
2343 /****************************************************************************
2344 * rom_write
2345 * writes a number of bytes to the Edgeport device's ROM starting at the
2346 * given address.
2347 * If successful returns the number of bytes written, otherwise it returns
2348 * a negative error number of the problem.
2349 ****************************************************************************/
2350 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2351 {
2352 int result;
2353 __u16 current_length;
2354 unsigned char *transfer_buffer;
2355
2356 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2357
2358 transfer_buffer = kmalloc (64, GFP_KERNEL);
2359 if (!transfer_buffer) {
2360 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2361 return -ENOMEM;
2362 }
2363
2364 /* need to split these writes up into 64 byte chunks */
2365 result = 0;
2366 while (length > 0) {
2367 if (length > 64) {
2368 current_length = 64;
2369 } else {
2370 current_length = length;
2371 }
2372 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2373 memcpy (transfer_buffer, data, current_length);
2374 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2375 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2376 if (result < 0)
2377 break;
2378 length -= current_length;
2379 addr += current_length;
2380 data += current_length;
2381 }
2382
2383 kfree (transfer_buffer);
2384 return result;
2385 }
2386
2387
2388 /****************************************************************************
2389 * rom_read
2390 * reads a number of bytes from the Edgeport device starting at the given
2391 * address.
2392 * If successful returns the number of bytes read, otherwise it returns
2393 * a negative error number of the problem.
2394 ****************************************************************************/
2395 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2396 {
2397 int result;
2398 __u16 current_length;
2399 unsigned char *transfer_buffer;
2400
2401 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2402
2403 transfer_buffer = kmalloc (64, GFP_KERNEL);
2404 if (!transfer_buffer) {
2405 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2406 return -ENOMEM;
2407 }
2408
2409 /* need to split these reads up into 64 byte chunks */
2410 result = 0;
2411 while (length > 0) {
2412 if (length > 64) {
2413 current_length = 64;
2414 } else {
2415 current_length = length;
2416 }
2417 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2418 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2419 0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2420 if (result < 0)
2421 break;
2422 memcpy (data, transfer_buffer, current_length);
2423 length -= current_length;
2424 addr += current_length;
2425 data += current_length;
2426 }
2427
2428 kfree (transfer_buffer);
2429 return result;
2430 }
2431
2432
2433 /****************************************************************************
2434 * send_iosp_ext_cmd
2435 * Is used to send a IOSP message to the Edgeport device
2436 ****************************************************************************/
2437 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2438 {
2439 unsigned char *buffer;
2440 unsigned char *currentCommand;
2441 int length = 0;
2442 int status = 0;
2443
2444 dbg("%s - %d, %d", __FUNCTION__, command, param);
2445
2446 buffer = kmalloc (10, GFP_ATOMIC);
2447 if (!buffer) {
2448 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2449 return -ENOMEM;
2450 }
2451
2452 currentCommand = buffer;
2453
2454 MAKE_CMD_EXT_CMD (&currentCommand, &length,
2455 edge_port->port->number - edge_port->port->serial->minor,
2456 command, param);
2457
2458 status = write_cmd_usb (edge_port, buffer, length);
2459 if (status) {
2460 /* something bad happened, let's free up the memory */
2461 kfree(buffer);
2462 }
2463
2464 return status;
2465 }
2466
2467
2468 /*****************************************************************************
2469 * write_cmd_usb
2470 * this function writes the given buffer out to the bulk write endpoint.
2471 *****************************************************************************/
2472 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2473 {
2474 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2475 int status = 0;
2476 struct urb *urb;
2477 int timeout;
2478
2479 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2480
2481 /* Allocate our next urb */
2482 urb = usb_alloc_urb (0, GFP_ATOMIC);
2483 if (!urb)
2484 return -ENOMEM;
2485
2486 CmdUrbs++;
2487 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
2488
2489 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2490 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2491 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2492
2493 edge_port->commandPending = TRUE;
2494 status = usb_submit_urb(urb, GFP_ATOMIC);
2495
2496 if (status) {
2497 /* something went wrong */
2498 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2499 usb_kill_urb(urb);
2500 usb_free_urb(urb);
2501 CmdUrbs--;
2502 return status;
2503 }
2504
2505 // wait for command to finish
2506 timeout = COMMAND_TIMEOUT;
2507 #if 0
2508 wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE));
2509
2510 if (edge_port->commandPending == TRUE) {
2511 /* command timed out */
2512 dbg("%s - command timed out", __FUNCTION__);
2513 status = -EINVAL;
2514 }
2515 #endif
2516 return status;
2517 }
2518
2519
2520 /*****************************************************************************
2521 * send_cmd_write_baud_rate
2522 * this function sends the proper command to change the baud rate of the
2523 * specified port.
2524 *****************************************************************************/
2525 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2526 {
2527 unsigned char *cmdBuffer;
2528 unsigned char *currCmd;
2529 int cmdLen = 0;
2530 int divisor;
2531 int status;
2532 unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2533
2534 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2535
2536 status = calc_baud_rate_divisor (baudRate, &divisor);
2537 if (status) {
2538 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2539 return status;
2540 }
2541
2542 // Alloc memory for the string of commands.
2543 cmdBuffer = kmalloc (0x100, GFP_ATOMIC);
2544 if (!cmdBuffer) {
2545 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2546 return -ENOMEM;
2547 }
2548 currCmd = cmdBuffer;
2549
2550 // Enable access to divisor latch
2551 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2552
2553 // Write the divisor itself
2554 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2555 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2556
2557 // Restore original value to disable access to divisor latch
2558 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2559
2560 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2561 if (status) {
2562 /* something bad happened, let's free up the memory */
2563 kfree (cmdBuffer);
2564 }
2565
2566 return status;
2567 }
2568
2569
2570 /*****************************************************************************
2571 * calc_baud_rate_divisor
2572 * this function calculates the proper baud rate divisor for the specified
2573 * baud rate.
2574 *****************************************************************************/
2575 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2576 {
2577 int i;
2578 __u16 custom;
2579
2580
2581 dbg("%s - %d", __FUNCTION__, baudrate);
2582
2583 for (i = 0; i < NUM_ENTRIES(divisor_table); i++) {
2584 if ( divisor_table[i].BaudRate == baudrate ) {
2585 *divisor = divisor_table[i].Divisor;
2586 return 0;
2587 }
2588 }
2589
2590 // We have tried all of the standard baud rates
2591 // lets try to calculate the divisor for this baud rate
2592 // Make sure the baud rate is reasonable
2593 if (baudrate > 50 && baudrate < 230400) {
2594 // get divisor
2595 custom = (__u16)((230400L + baudrate/2) / baudrate);
2596
2597 *divisor = custom;
2598
2599 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2600 return 0;
2601 }
2602
2603 return -1;
2604 }
2605
2606
2607 /*****************************************************************************
2608 * send_cmd_write_uart_register
2609 * this function builds up a uart register message and sends to to the device.
2610 *****************************************************************************/
2611 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2612 {
2613 unsigned char *cmdBuffer;
2614 unsigned char *currCmd;
2615 unsigned long cmdLen = 0;
2616 int status;
2617
2618 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2619
2620 // Alloc memory for the string of commands.
2621 cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2622 if (cmdBuffer == NULL ) {
2623 return -ENOMEM;
2624 }
2625
2626 currCmd = cmdBuffer;
2627
2628 // Build a cmd in the buffer to write the given register
2629 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2630 edge_port->port->number - edge_port->port->serial->minor,
2631 regNum, regValue);
2632
2633 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2634 if (status) {
2635 /* something bad happened, let's free up the memory */
2636 kfree (cmdBuffer);
2637 }
2638
2639 return status;
2640 }
2641
2642
2643 /*****************************************************************************
2644 * change_port_settings
2645 * This routine is called to set the UART on the device to match the specified
2646 * new settings.
2647 *****************************************************************************/
2648 #ifndef CMSPAR
2649 #define CMSPAR 0
2650 #endif
2651 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios)
2652 {
2653 struct tty_struct *tty;
2654 int baud;
2655 unsigned cflag;
2656 __u8 mask = 0xff;
2657 __u8 lData;
2658 __u8 lParity;
2659 __u8 lStop;
2660 __u8 rxFlow;
2661 __u8 txFlow;
2662 int status;
2663
2664 dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2665
2666 if ((!edge_port->open) &&
2667 (!edge_port->openPending)) {
2668 dbg("%s - port not opened", __FUNCTION__);
2669 return;
2670 }
2671
2672 tty = edge_port->port->tty;
2673 if ((!tty) ||
2674 (!tty->termios)) {
2675 dbg("%s - no tty structures", __FUNCTION__);
2676 return;
2677 }
2678
2679 cflag = tty->termios->c_cflag;
2680
2681 switch (cflag & CSIZE) {
2682 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break;
2683 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break;
2684 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break;
2685 default:
2686 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break;
2687 }
2688
2689 lParity = LCR_PAR_NONE;
2690 if (cflag & PARENB) {
2691 if (cflag & CMSPAR) {
2692 if (cflag & PARODD) {
2693 lParity = LCR_PAR_MARK;
2694 dbg("%s - parity = mark", __FUNCTION__);
2695 } else {
2696 lParity = LCR_PAR_SPACE;
2697 dbg("%s - parity = space", __FUNCTION__);
2698 }
2699 } else if (cflag & PARODD) {
2700 lParity = LCR_PAR_ODD;
2701 dbg("%s - parity = odd", __FUNCTION__);
2702 } else {
2703 lParity = LCR_PAR_EVEN;
2704 dbg("%s - parity = even", __FUNCTION__);
2705 }
2706 } else {
2707 dbg("%s - parity = none", __FUNCTION__);
2708 }
2709
2710 if (cflag & CSTOPB) {
2711 lStop = LCR_STOP_2;
2712 dbg("%s - stop bits = 2", __FUNCTION__);
2713 } else {
2714 lStop = LCR_STOP_1;
2715 dbg("%s - stop bits = 1", __FUNCTION__);
2716 }
2717
2718 /* figure out the flow control settings */
2719 rxFlow = txFlow = 0x00;
2720 if (cflag & CRTSCTS) {
2721 rxFlow |= IOSP_RX_FLOW_RTS;
2722 txFlow |= IOSP_TX_FLOW_CTS;
2723 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2724 } else {
2725 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2726 }
2727
2728 /* if we are implementing XON/XOFF, set the start and stop character in the device */
2729 if (I_IXOFF(tty) || I_IXON(tty)) {
2730 unsigned char stop_char = STOP_CHAR(tty);
2731 unsigned char start_char = START_CHAR(tty);
2732
2733 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2734 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2735
2736 /* if we are implementing INBOUND XON/XOFF */
2737 if (I_IXOFF(tty)) {
2738 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2739 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2740 } else {
2741 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2742 }
2743
2744 /* if we are implementing OUTBOUND XON/XOFF */
2745 if (I_IXON(tty)) {
2746 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2747 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2748 } else {
2749 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2750 }
2751 }
2752
2753 /* Set flow control to the configured value */
2754 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2755 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2756
2757
2758 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2759 edge_port->shadowLCR |= (lData | lParity | lStop);
2760
2761 edge_port->validDataMask = mask;
2762
2763 /* Send the updated LCR value to the EdgePort */
2764 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2765 if (status != 0) {
2766 return;
2767 }
2768
2769 /* set up the MCR register and send it to the EdgePort */
2770 edge_port->shadowMCR = MCR_MASTER_IE;
2771 if (cflag & CBAUD) {
2772 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2773 }
2774 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2775 if (status != 0) {
2776 return;
2777 }
2778
2779 /* Determine divisor based on baud rate */
2780 baud = tty_get_baud_rate(tty);
2781 if (!baud) {
2782 /* pick a default, any default... */
2783 baud = 9600;
2784 }
2785
2786 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2787 status = send_cmd_write_baud_rate (edge_port, baud);
2788
2789 return;
2790 }
2791
2792
2793 /****************************************************************************
2794 * unicode_to_ascii
2795 * Turns a string from Unicode into ASCII.
2796 * Doesn't do a good job with any characters that are outside the normal
2797 * ASCII range, but it's only for debugging...
2798 * NOTE: expects the unicode in LE format
2799 ****************************************************************************/
2800 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size)
2801 {
2802 int i;
2803
2804 if (unicode_size <= 0)
2805 return;
2806
2807 for (i = 0; i < unicode_size; ++i)
2808 string[i] = (char)(le16_to_cpu(unicode[i]));
2809 string[unicode_size] = 0x00;
2810 }
2811
2812
2813 /****************************************************************************
2814 * get_manufacturing_desc
2815 * reads in the manufacturing descriptor and stores it into the serial
2816 * structure.
2817 ****************************************************************************/
2818 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2819 {
2820 int response;
2821
2822 dbg("getting manufacturer descriptor");
2823
2824 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2825 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2826 (__u8 *)(&edge_serial->manuf_descriptor));
2827
2828 if (response < 1) {
2829 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2830 } else {
2831 char string[30];
2832 dbg("**Manufacturer Descriptor");
2833 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize);
2834 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize);
2835 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev);
2836 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev);
2837 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts);
2838 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2839 unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1);
2840 dbg(" SerialNumber: %s", string);
2841 unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1);
2842 dbg(" AssemblyNumber: %s", string);
2843 unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1);
2844 dbg(" OemAssyNumber: %s", string);
2845 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType);
2846 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid);
2847 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig);
2848 }
2849 }
2850
2851
2852 /****************************************************************************
2853 * get_boot_desc
2854 * reads in the bootloader descriptor and stores it into the serial
2855 * structure.
2856 ****************************************************************************/
2857 static void get_boot_desc (struct edgeport_serial *edge_serial)
2858 {
2859 int response;
2860
2861 dbg("getting boot descriptor");
2862
2863 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2864 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2865 (__u8 *)(&edge_serial->boot_descriptor));
2866
2867 if (response < 1) {
2868 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2869 } else {
2870 dbg("**Boot Descriptor:");
2871 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2872 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion);
2873 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion);
2874 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2875 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2876 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0);
2877 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1);
2878 }
2879 }
2880
2881
2882 /****************************************************************************
2883 * load_application_firmware
2884 * This is called to load the application firmware to the device
2885 ****************************************************************************/
2886 static void load_application_firmware (struct edgeport_serial *edge_serial)
2887 {
2888 struct edge_firmware_image_record *record;
2889 unsigned char *firmware;
2890 unsigned char *FirmwareImage;
2891 int ImageSize;
2892 int response;
2893
2894
2895 switch (edge_serial->product_info.iDownloadFile) {
2896 case EDGE_DOWNLOAD_FILE_I930:
2897 dbg("downloading firmware version (930) %d.%d.%d",
2898 OperationalCodeImageVersion_GEN1.MajorVersion,
2899 OperationalCodeImageVersion_GEN1.MinorVersion,
2900 OperationalCodeImageVersion_GEN1.BuildNumber);
2901 firmware = &OperationalCodeImage_GEN1[0];
2902 FirmwareImage = &OperationalCodeImage_GEN1[0];
2903 ImageSize = sizeof(OperationalCodeImage_GEN1);
2904 break;
2905
2906 case EDGE_DOWNLOAD_FILE_80251:
2907 dbg("downloading firmware version (80251) %d.%d.%d",
2908 OperationalCodeImageVersion_GEN2.MajorVersion,
2909 OperationalCodeImageVersion_GEN2.MinorVersion,
2910 OperationalCodeImageVersion_GEN2.BuildNumber);
2911 firmware = &OperationalCodeImage_GEN2[0];
2912 FirmwareImage = &OperationalCodeImage_GEN2[0];
2913 ImageSize = sizeof(OperationalCodeImage_GEN2);
2914 break;
2915
2916 case EDGE_DOWNLOAD_FILE_NONE:
2917 dbg ("No download file specified, skipping download\n");
2918 return;
2919
2920 default:
2921 return;
2922 }
2923
2924
2925 for (;;) {
2926 record = (struct edge_firmware_image_record *)firmware;
2927 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2928 if (response < 0) {
2929 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));
2930 break;
2931 }
2932 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2933 if (firmware >= &FirmwareImage[ImageSize]) {
2934 break;
2935 }
2936 }
2937
2938 dbg("sending exec_dl_code");
2939 response = usb_control_msg (edge_serial->serial->dev,
2940 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2941 USB_REQUEST_ION_EXEC_DL_CODE,
2942 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2943
2944 return;
2945 }
2946
2947
2948 /****************************************************************************
2949 * edge_startup
2950 ****************************************************************************/
2951 static int edge_startup (struct usb_serial *serial)
2952 {
2953 struct edgeport_serial *edge_serial;
2954 struct edgeport_port *edge_port;
2955 struct usb_device *dev;
2956 int i;
2957
2958 dev = serial->dev;
2959
2960 /* create our private serial structure */
2961 edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL);
2962 if (edge_serial == NULL) {
2963 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2964 return -ENOMEM;
2965 }
2966 memset (edge_serial, 0, sizeof(struct edgeport_serial));
2967 spin_lock_init(&edge_serial->es_lock);
2968 edge_serial->serial = serial;
2969 usb_set_serial_data(serial, edge_serial);
2970
2971 /* get the name for the device from the device */
2972 if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) {
2973 edge_serial->name[i-1] = ' ';
2974 }
2975
2976 get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]);
2977
2978 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2979
2980 /* get the manufacturing descriptor for this device */
2981 get_manufacturing_desc (edge_serial);
2982
2983 /* get the boot descriptor */
2984 get_boot_desc (edge_serial);
2985
2986 get_product_info(edge_serial);
2987
2988 /* set the number of ports from the manufacturing description */
2989 /* serial->num_ports = serial->product_info.NumPorts; */
2990 if (edge_serial->product_info.NumPorts != serial->num_ports) {
2991 warn("%s - Device Reported %d serial ports vs core "
2992 "thinking we have %d ports, email greg@kroah.com this info.",
2993 __FUNCTION__, edge_serial->product_info.NumPorts,
2994 serial->num_ports);
2995 }
2996
2997 dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2998
2999 /* now load the application firmware into this device */
3000 load_application_firmware (edge_serial);
3001
3002 dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
3003
3004 /* Check current Edgeport EEPROM and update if necessary */
3005 update_edgeport_E2PROM (edge_serial);
3006
3007 dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
3008
3009 /* set the configuration to use #1 */
3010 // dbg("set_configuration 1");
3011 // usb_set_configuration (dev, 1);
3012
3013 /* we set up the pointers to the endpoints in the edge_open function,
3014 * as the structures aren't created yet. */
3015
3016 /* set up our port private structures */
3017 for (i = 0; i < serial->num_ports; ++i) {
3018 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
3019 if (edge_port == NULL) {
3020 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
3021 usb_set_serial_data(serial, NULL);
3022 kfree(edge_serial);
3023 return -ENOMEM;
3024 }
3025 memset (edge_port, 0, sizeof(struct edgeport_port));
3026 spin_lock_init(&edge_port->ep_lock);
3027 edge_port->port = serial->port[i];
3028 usb_set_serial_port_data(serial->port[i], edge_port);
3029 }
3030
3031 return 0;
3032 }
3033
3034
3035 /****************************************************************************
3036 * edge_shutdown
3037 * This function is called whenever the device is removed from the usb bus.
3038 ****************************************************************************/
3039 static void edge_shutdown (struct usb_serial *serial)
3040 {
3041 int i;
3042
3043 dbg("%s", __FUNCTION__);
3044
3045 /* stop reads and writes on all ports */
3046 for (i=0; i < serial->num_ports; ++i) {
3047 kfree (usb_get_serial_port_data(serial->port[i]));
3048 usb_set_serial_port_data(serial->port[i], NULL);
3049 }
3050 kfree (usb_get_serial_data(serial));
3051 usb_set_serial_data(serial, NULL);
3052 }
3053
3054
3055 /****************************************************************************
3056 * edgeport_init
3057 * This is called by the module subsystem, or on startup to initialize us
3058 ****************************************************************************/
3059 static int __init edgeport_init(void)
3060 {
3061 int retval;
3062
3063 retval = usb_serial_register(&edgeport_2port_device);
3064 if (retval)
3065 goto failed_2port_device_register;
3066 retval = usb_serial_register(&edgeport_4port_device);
3067 if (retval)
3068 goto failed_4port_device_register;
3069 retval = usb_serial_register(&edgeport_8port_device);
3070 if (retval)
3071 goto failed_8port_device_register;
3072 retval = usb_register(&io_driver);
3073 if (retval)
3074 goto failed_usb_register;
3075 info(DRIVER_DESC " " DRIVER_VERSION);
3076 return 0;
3077
3078 failed_usb_register:
3079 usb_serial_deregister(&edgeport_8port_device);
3080 failed_8port_device_register:
3081 usb_serial_deregister(&edgeport_4port_device);
3082 failed_4port_device_register:
3083 usb_serial_deregister(&edgeport_2port_device);
3084 failed_2port_device_register:
3085 return retval;
3086 }
3087
3088
3089 /****************************************************************************
3090 * edgeport_exit
3091 * Called when the driver is about to be unloaded.
3092 ****************************************************************************/
3093 static void __exit edgeport_exit (void)
3094 {
3095 usb_deregister (&io_driver);
3096 usb_serial_deregister (&edgeport_2port_device);
3097 usb_serial_deregister (&edgeport_4port_device);
3098 usb_serial_deregister (&edgeport_8port_device);
3099 }
3100
3101 module_init(edgeport_init);
3102 module_exit(edgeport_exit);
3103
3104 /* Module information */
3105 MODULE_AUTHOR( DRIVER_AUTHOR );
3106 MODULE_DESCRIPTION( DRIVER_DESC );
3107 MODULE_LICENSE("GPL");
3108
3109 module_param(debug, bool, S_IRUGO | S_IWUSR);
3110 MODULE_PARM_DESC(debug, "Debug enabled or not");
3111
3112 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3113 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree