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Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
[deliverable/linux.git] / drivers / usb / serial / io_edgeport.c
1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/tty.h>
38 #include <linux/tty_driver.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/spinlock.h>
42 #include <linux/serial.h>
43 #include <linux/ioctl.h>
44 #include <linux/wait.h>
45 #include <linux/firmware.h>
46 #include <linux/ihex.h>
47 #include <asm/uaccess.h>
48 #include <linux/usb.h>
49 #include <linux/usb/serial.h>
50 #include "io_edgeport.h"
51 #include "io_ionsp.h" /* info for the iosp messages */
52 #include "io_16654.h" /* 16654 UART defines */
53
54 /*
55 * Version Information
56 */
57 #define DRIVER_VERSION "v2.7"
58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
59 #define DRIVER_DESC "Edgeport USB Serial Driver"
60
61 #define MAX_NAME_LEN 64
62
63 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
64 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
65 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
66
67 /* receive port state */
68 enum RXSTATE {
69 EXPECT_HDR1 = 0, /* Expect header byte 1 */
70 EXPECT_HDR2 = 1, /* Expect header byte 2 */
71 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
72 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
73 };
74
75
76 /* Transmit Fifo
77 * This Transmit queue is an extension of the edgeport Rx buffer.
78 * The maximum amount of data buffered in both the edgeport
79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
80 */
81 struct TxFifo {
82 unsigned int head; /* index to head pointer (write) */
83 unsigned int tail; /* index to tail pointer (read) */
84 unsigned int count; /* Bytes in queue */
85 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
86 unsigned char *fifo; /* allocated Buffer */
87 };
88
89 /* This structure holds all of the local port information */
90 struct edgeport_port {
91 __u16 txCredits; /* our current credits for this port */
92 __u16 maxTxCredits; /* the max size of the port */
93
94 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
95 struct urb *write_urb; /* write URB for this port */
96 bool write_in_progress; /* 'true' while a write URB is outstanding */
97 spinlock_t ep_lock;
98
99 __u8 shadowLCR; /* last LCR value received */
100 __u8 shadowMCR; /* last MCR value received */
101 __u8 shadowMSR; /* last MSR value received */
102 __u8 shadowLSR; /* last LSR value received */
103 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
104 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
105 __u8 validDataMask;
106 __u32 baudRate;
107
108 bool open;
109 bool openPending;
110 bool commandPending;
111 bool closePending;
112 bool chaseResponsePending;
113
114 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
115 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
116 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
117 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
118
119 struct async_icount icount;
120 struct usb_serial_port *port; /* loop back to the owner of this object */
121 };
122
123
124 /* This structure holds all of the individual device information */
125 struct edgeport_serial {
126 char name[MAX_NAME_LEN+2]; /* string name of this device */
127
128 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
129 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
130 struct edgeport_product_info product_info; /* Product Info */
131 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
132 int is_epic; /* flag if EPiC device or not */
133
134 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
135 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
136 struct urb * interrupt_read_urb; /* our interrupt urb */
137
138 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
139 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
140 struct urb * read_urb; /* our bulk read urb */
141 bool read_in_progress;
142 spinlock_t es_lock;
143
144 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
145
146 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
147
148 enum RXSTATE rxState; /* the current state of the bulk receive processor */
149 __u8 rxHeader1; /* receive header byte 1 */
150 __u8 rxHeader2; /* receive header byte 2 */
151 __u8 rxHeader3; /* receive header byte 3 */
152 __u8 rxPort; /* the port that we are currently receiving data for */
153 __u8 rxStatusCode; /* the receive status code */
154 __u8 rxStatusParam; /* the receive status paramater */
155 __s16 rxBytesRemaining; /* the number of port bytes left to read */
156 struct usb_serial *serial; /* loop back to the owner of this object */
157 };
158
159 /* baud rate information */
160 struct divisor_table_entry {
161 __u32 BaudRate;
162 __u16 Divisor;
163 };
164
165 //
166 // Define table of divisors for Rev A EdgePort/4 hardware
167 // These assume a 3.6864MHz crystal, the standard /16, and
168 // MCR.7 = 0.
169 //
170 static const struct divisor_table_entry divisor_table[] = {
171 { 50, 4608},
172 { 75, 3072},
173 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
174 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
175 { 150, 1536},
176 { 300, 768},
177 { 600, 384},
178 { 1200, 192},
179 { 1800, 128},
180 { 2400, 96},
181 { 4800, 48},
182 { 7200, 32},
183 { 9600, 24},
184 { 14400, 16},
185 { 19200, 12},
186 { 38400, 6},
187 { 57600, 4},
188 { 115200, 2},
189 { 230400, 1},
190 };
191
192 /* local variables */
193 static int debug;
194
195 static int low_latency = 1; /* tty low latency flag, on by default */
196
197 static atomic_t CmdUrbs; /* Number of outstanding Command Write Urbs */
198
199
200 /* local function prototypes */
201
202 /* function prototypes for all URB callbacks */
203 static void edge_interrupt_callback (struct urb *urb);
204 static void edge_bulk_in_callback (struct urb *urb);
205 static void edge_bulk_out_data_callback (struct urb *urb);
206 static void edge_bulk_out_cmd_callback (struct urb *urb);
207
208 /* function prototypes for the usbserial callbacks */
209 static int edge_open (struct usb_serial_port *port, struct file *filp);
210 static void edge_close (struct usb_serial_port *port, struct file *filp);
211 static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count);
212 static int edge_write_room (struct usb_serial_port *port);
213 static int edge_chars_in_buffer (struct usb_serial_port *port);
214 static void edge_throttle (struct usb_serial_port *port);
215 static void edge_unthrottle (struct usb_serial_port *port);
216 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios);
217 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
218 static void edge_break (struct usb_serial_port *port, int break_state);
219 static int edge_tiocmget (struct usb_serial_port *port, struct file *file);
220 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
221 static int edge_startup (struct usb_serial *serial);
222 static void edge_shutdown (struct usb_serial *serial);
223
224
225 #include "io_tables.h" /* all of the devices that this driver supports */
226
227 /* function prototypes for all of our local functions */
228 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
229 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
230 static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
231 static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr);
232 static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
233 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param);
234 static int calc_baud_rate_divisor (int baud_rate, int *divisor);
235 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate);
236 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios);
237 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
238 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
239 static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
240
241 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, const __u8 *data);
242 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
243 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, const __u8 *data);
244 static void get_manufacturing_desc (struct edgeport_serial *edge_serial);
245 static void get_boot_desc (struct edgeport_serial *edge_serial);
246 static void load_application_firmware (struct edgeport_serial *edge_serial);
247
248 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size);
249
250
251 // ************************************************************************
252 // ************************************************************************
253 // ************************************************************************
254 // ************************************************************************
255
256 /************************************************************************
257 * *
258 * update_edgeport_E2PROM() Compare current versions of *
259 * Boot ROM and Manufacture *
260 * Descriptors with versions *
261 * embedded in this driver *
262 * *
263 ************************************************************************/
264 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
265 {
266 __u32 BootCurVer;
267 __u32 BootNewVer;
268 __u8 BootMajorVersion;
269 __u8 BootMinorVersion;
270 __u16 BootBuildNumber;
271 __u32 Bootaddr;
272 const struct ihex_binrec *rec;
273 const struct firmware *fw;
274 const char *fw_name;
275 int response;
276
277 switch (edge_serial->product_info.iDownloadFile) {
278 case EDGE_DOWNLOAD_FILE_I930:
279 fw_name = "edgeport/boot.fw";
280 break;
281
282 case EDGE_DOWNLOAD_FILE_80251:
283 fw_name = "edgeport/boot2.fw";
284 break;
285
286 default:
287 return;
288 }
289
290 response = request_ihex_firmware(&fw, fw_name,
291 &edge_serial->serial->dev->dev);
292 if (response) {
293 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
294 fw_name, response);
295 return;
296 }
297
298 rec = (const struct ihex_binrec *)fw->data;
299 BootMajorVersion = rec->data[0];
300 BootMinorVersion = rec->data[1];
301 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
302
303 // Check Boot Image Version
304 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
305 (edge_serial->boot_descriptor.MinorVersion << 16) +
306 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
307
308 BootNewVer = (BootMajorVersion << 24) +
309 (BootMinorVersion << 16) +
310 BootBuildNumber;
311
312 dbg("Current Boot Image version %d.%d.%d",
313 edge_serial->boot_descriptor.MajorVersion,
314 edge_serial->boot_descriptor.MinorVersion,
315 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
316
317
318 if (BootNewVer > BootCurVer) {
319 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
320 edge_serial->boot_descriptor.MajorVersion,
321 edge_serial->boot_descriptor.MinorVersion,
322 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
323 BootMajorVersion, BootMinorVersion, BootBuildNumber);
324
325 dbg("Downloading new Boot Image");
326
327 for (rec = ihex_next_binrec(rec); rec;
328 rec = ihex_next_binrec(rec)) {
329 Bootaddr = be32_to_cpu(rec->addr);
330 response = rom_write(edge_serial->serial,
331 Bootaddr >> 16,
332 Bootaddr & 0xFFFF,
333 be16_to_cpu(rec->len),
334 &rec->data[0]);
335 if (response < 0) {
336 dev_err(&edge_serial->serial->dev->dev,
337 "rom_write failed (%x, %x, %d)\n",
338 Bootaddr >> 16, Bootaddr & 0xFFFF,
339 be16_to_cpu(rec->len));
340 break;
341 }
342 }
343 } else {
344 dbg("Boot Image -- already up to date");
345 }
346 release_firmware(fw);
347 }
348
349
350 /************************************************************************
351 * *
352 * Get string descriptor from device *
353 * *
354 ************************************************************************/
355 static int get_string (struct usb_device *dev, int Id, char *string, int buflen)
356 {
357 struct usb_string_descriptor StringDesc;
358 struct usb_string_descriptor *pStringDesc;
359
360 dbg("%s - USB String ID = %d", __func__, Id );
361
362 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
363 return 0;
364 }
365
366 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
367
368 if (!pStringDesc) {
369 return 0;
370 }
371
372 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
373 kfree(pStringDesc);
374 return 0;
375 }
376
377 unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2);
378
379 kfree(pStringDesc);
380 dbg("%s - USB String %s", __func__, string);
381 return strlen(string);
382 }
383
384
385 #if 0
386 /************************************************************************
387 *
388 * Get string descriptor from device
389 *
390 ************************************************************************/
391 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
392 {
393 struct usb_string_descriptor StringDesc;
394 struct usb_string_descriptor *pStringDesc;
395
396 dbg("%s - USB String ID = %d", __func__, Id );
397
398 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
399 return 0;
400 }
401
402 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
403
404 if (!pStringDesc) {
405 return -1;
406 }
407
408 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
409 kfree(pStringDesc);
410 return -1;
411 }
412
413 *pRetDesc = pStringDesc;
414 return 0;
415 }
416 #endif
417
418 static void dump_product_info(struct edgeport_product_info *product_info)
419 {
420 // Dump Product Info structure
421 dbg("**Product Information:");
422 dbg(" ProductId %x", product_info->ProductId );
423 dbg(" NumPorts %d", product_info->NumPorts );
424 dbg(" ProdInfoVer %d", product_info->ProdInfoVer );
425 dbg(" IsServer %d", product_info->IsServer);
426 dbg(" IsRS232 %d", product_info->IsRS232 );
427 dbg(" IsRS422 %d", product_info->IsRS422 );
428 dbg(" IsRS485 %d", product_info->IsRS485 );
429 dbg(" RomSize %d", product_info->RomSize );
430 dbg(" RamSize %d", product_info->RamSize );
431 dbg(" CpuRev %x", product_info->CpuRev );
432 dbg(" BoardRev %x", product_info->BoardRev);
433 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
434 product_info->BootMinorVersion,
435 le16_to_cpu(product_info->BootBuildNumber));
436 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0],
437 product_info->ManufactureDescDate[1],
438 product_info->ManufactureDescDate[2]+1900);
439 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
440 dbg(" EpicVer %d", product_info->EpicVer);
441 }
442
443 static void get_product_info(struct edgeport_serial *edge_serial)
444 {
445 struct edgeport_product_info *product_info = &edge_serial->product_info;
446
447 memset (product_info, 0, sizeof(struct edgeport_product_info));
448
449 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
450 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
451 product_info->ProdInfoVer = 0;
452
453 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
454 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
455 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
456 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
457
458 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion;
459 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion;
460 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber;
461
462 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
463
464 // check if this is 2nd generation hardware
465 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
466 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
467 } else {
468 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
469 }
470
471 // Determine Product type and set appropriate flags
472 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
473 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
474 case ION_DEVICE_ID_EDGEPORT_4T:
475 case ION_DEVICE_ID_EDGEPORT_4:
476 case ION_DEVICE_ID_EDGEPORT_2:
477 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
478 case ION_DEVICE_ID_EDGEPORT_8:
479 case ION_DEVICE_ID_EDGEPORT_421:
480 case ION_DEVICE_ID_EDGEPORT_21:
481 case ION_DEVICE_ID_EDGEPORT_2_DIN:
482 case ION_DEVICE_ID_EDGEPORT_4_DIN:
483 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
484 product_info->IsRS232 = 1;
485 break;
486
487 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485
488 product_info->IsRS422 = 1;
489 product_info->IsRS485 = 1;
490 break;
491
492 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422
493 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422
494 product_info->IsRS422 = 1;
495 break;
496 }
497
498 dump_product_info(product_info);
499 }
500
501 static int get_epic_descriptor(struct edgeport_serial *ep)
502 {
503 int result;
504 struct usb_serial *serial = ep->serial;
505 struct edgeport_product_info *product_info = &ep->product_info;
506 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
507 struct edge_compatibility_bits *bits;
508
509 ep->is_epic = 0;
510 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
511 USB_REQUEST_ION_GET_EPIC_DESC,
512 0xC0, 0x00, 0x00,
513 &ep->epic_descriptor,
514 sizeof(struct edge_compatibility_descriptor),
515 300);
516
517 dbg("%s result = %d", __func__, result);
518
519 if (result > 0) {
520 ep->is_epic = 1;
521 memset(product_info, 0, sizeof(struct edgeport_product_info));
522
523 product_info->NumPorts = epic->NumPorts;
524 product_info->ProdInfoVer = 0;
525 product_info->FirmwareMajorVersion = epic->MajorVersion;
526 product_info->FirmwareMinorVersion = epic->MinorVersion;
527 product_info->FirmwareBuildNumber = epic->BuildNumber;
528 product_info->iDownloadFile = epic->iDownloadFile;
529 product_info->EpicVer = epic->EpicVer;
530 product_info->Epic = epic->Supports;
531 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
532 dump_product_info(product_info);
533
534 bits = &ep->epic_descriptor.Supports;
535 dbg("**EPIC descriptor:");
536 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE");
537 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE" );
538 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE" );
539 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE" );
540 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE" );
541 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE" );
542 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE" );
543 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE" );
544 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE" );
545 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE" );
546 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE" );
547 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE" );
548 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE" );
549 }
550
551 return result;
552 }
553
554
555 /************************************************************************/
556 /************************************************************************/
557 /* U S B C A L L B A C K F U N C T I O N S */
558 /* U S B C A L L B A C K F U N C T I O N S */
559 /************************************************************************/
560 /************************************************************************/
561
562 /*****************************************************************************
563 * edge_interrupt_callback
564 * this is the callback function for when we have received data on the
565 * interrupt endpoint.
566 *****************************************************************************/
567 static void edge_interrupt_callback (struct urb *urb)
568 {
569 struct edgeport_serial *edge_serial = urb->context;
570 struct edgeport_port *edge_port;
571 struct usb_serial_port *port;
572 unsigned char *data = urb->transfer_buffer;
573 int length = urb->actual_length;
574 int bytes_avail;
575 int position;
576 int txCredits;
577 int portNumber;
578 int result;
579 int status = urb->status;
580
581 dbg("%s", __func__);
582
583 switch (status) {
584 case 0:
585 /* success */
586 break;
587 case -ECONNRESET:
588 case -ENOENT:
589 case -ESHUTDOWN:
590 /* this urb is terminated, clean up */
591 dbg("%s - urb shutting down with status: %d",
592 __func__, status);
593 return;
594 default:
595 dbg("%s - nonzero urb status received: %d",
596 __func__, status);
597 goto exit;
598 }
599
600 // process this interrupt-read even if there are no ports open
601 if (length) {
602 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __func__, length, data);
603
604 if (length > 1) {
605 bytes_avail = data[0] | (data[1] << 8);
606 if (bytes_avail) {
607 spin_lock(&edge_serial->es_lock);
608 edge_serial->rxBytesAvail += bytes_avail;
609 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
610
611 if (edge_serial->rxBytesAvail > 0 &&
612 !edge_serial->read_in_progress) {
613 dbg("%s - posting a read", __func__);
614 edge_serial->read_in_progress = true;
615
616 /* we have pending bytes on the bulk in pipe, send a request */
617 edge_serial->read_urb->dev = edge_serial->serial->dev;
618 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
619 if (result) {
620 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
621 edge_serial->read_in_progress = false;
622 }
623 }
624 spin_unlock(&edge_serial->es_lock);
625 }
626 }
627 /* grab the txcredits for the ports if available */
628 position = 2;
629 portNumber = 0;
630 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
631 txCredits = data[position] | (data[position+1] << 8);
632 if (txCredits) {
633 port = edge_serial->serial->port[portNumber];
634 edge_port = usb_get_serial_port_data(port);
635 if (edge_port->open) {
636 spin_lock(&edge_port->ep_lock);
637 edge_port->txCredits += txCredits;
638 spin_unlock(&edge_port->ep_lock);
639 dbg("%s - txcredits for port%d = %d", __func__, portNumber, edge_port->txCredits);
640
641 /* tell the tty driver that something has changed */
642 if (edge_port->port->tty)
643 tty_wakeup(edge_port->port->tty);
644
645 // Since we have more credit, check if more data can be sent
646 send_more_port_data(edge_serial, edge_port);
647 }
648 }
649 position += 2;
650 ++portNumber;
651 }
652 }
653
654 exit:
655 result = usb_submit_urb (urb, GFP_ATOMIC);
656 if (result) {
657 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __func__, result);
658 }
659 }
660
661
662 /*****************************************************************************
663 * edge_bulk_in_callback
664 * this is the callback function for when we have received data on the
665 * bulk in endpoint.
666 *****************************************************************************/
667 static void edge_bulk_in_callback (struct urb *urb)
668 {
669 struct edgeport_serial *edge_serial = urb->context;
670 unsigned char *data = urb->transfer_buffer;
671 int retval;
672 __u16 raw_data_length;
673 int status = urb->status;
674
675 dbg("%s", __func__);
676
677 if (status) {
678 dbg("%s - nonzero read bulk status received: %d",
679 __func__, status);
680 edge_serial->read_in_progress = false;
681 return;
682 }
683
684 if (urb->actual_length == 0) {
685 dbg("%s - read bulk callback with no data", __func__);
686 edge_serial->read_in_progress = false;
687 return;
688 }
689
690 raw_data_length = urb->actual_length;
691
692 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __func__, raw_data_length, data);
693
694 spin_lock(&edge_serial->es_lock);
695
696 /* decrement our rxBytes available by the number that we just got */
697 edge_serial->rxBytesAvail -= raw_data_length;
698
699 dbg("%s - Received = %d, rxBytesAvail %d", __func__, raw_data_length, edge_serial->rxBytesAvail);
700
701 process_rcvd_data (edge_serial, data, urb->actual_length);
702
703 /* check to see if there's any more data for us to read */
704 if (edge_serial->rxBytesAvail > 0) {
705 dbg("%s - posting a read", __func__);
706 edge_serial->read_urb->dev = edge_serial->serial->dev;
707 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
708 if (retval) {
709 dev_err(&urb->dev->dev,
710 "%s - usb_submit_urb(read bulk) failed, "
711 "retval = %d\n", __func__, retval);
712 edge_serial->read_in_progress = false;
713 }
714 } else {
715 edge_serial->read_in_progress = false;
716 }
717
718 spin_unlock(&edge_serial->es_lock);
719 }
720
721
722 /*****************************************************************************
723 * edge_bulk_out_data_callback
724 * this is the callback function for when we have finished sending serial data
725 * on the bulk out endpoint.
726 *****************************************************************************/
727 static void edge_bulk_out_data_callback (struct urb *urb)
728 {
729 struct edgeport_port *edge_port = urb->context;
730 struct tty_struct *tty;
731 int status = urb->status;
732
733 dbg("%s", __func__);
734
735 if (status) {
736 dbg("%s - nonzero write bulk status received: %d",
737 __func__, status);
738 }
739
740 tty = edge_port->port->tty;
741
742 if (tty && edge_port->open) {
743 /* let the tty driver wakeup if it has a special write_wakeup function */
744 tty_wakeup(tty);
745 }
746
747 // Release the Write URB
748 edge_port->write_in_progress = false;
749
750 // Check if more data needs to be sent
751 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
752 }
753
754
755 /*****************************************************************************
756 * BulkOutCmdCallback
757 * this is the callback function for when we have finished sending a command
758 * on the bulk out endpoint.
759 *****************************************************************************/
760 static void edge_bulk_out_cmd_callback (struct urb *urb)
761 {
762 struct edgeport_port *edge_port = urb->context;
763 struct tty_struct *tty;
764 int status = urb->status;
765
766 dbg("%s", __func__);
767
768 atomic_dec(&CmdUrbs);
769 dbg("%s - FREE URB %p (outstanding %d)", __func__, urb, atomic_read(&CmdUrbs));
770
771
772 /* clean up the transfer buffer */
773 kfree(urb->transfer_buffer);
774
775 /* Free the command urb */
776 usb_free_urb (urb);
777
778 if (status) {
779 dbg("%s - nonzero write bulk status received: %d", __func__, status);
780 return;
781 }
782
783 /* Get pointer to tty */
784 tty = edge_port->port->tty;
785
786 /* tell the tty driver that something has changed */
787 if (tty && edge_port->open)
788 tty_wakeup(tty);
789
790 /* we have completed the command */
791 edge_port->commandPending = false;
792 wake_up(&edge_port->wait_command);
793 }
794
795
796 /*****************************************************************************
797 * Driver tty interface functions
798 *****************************************************************************/
799
800 /*****************************************************************************
801 * SerialOpen
802 * this function is called by the tty driver when a port is opened
803 * If successful, we return 0
804 * Otherwise we return a negative error number.
805 *****************************************************************************/
806 static int edge_open (struct usb_serial_port *port, struct file * filp)
807 {
808 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
809 struct usb_serial *serial;
810 struct edgeport_serial *edge_serial;
811 int response;
812
813 dbg("%s - port %d", __func__, port->number);
814
815 if (edge_port == NULL)
816 return -ENODEV;
817
818 if (port->tty)
819 port->tty->low_latency = low_latency;
820
821 /* see if we've set up our endpoint info yet (can't set it up in edge_startup
822 as the structures were not set up at that time.) */
823 serial = port->serial;
824 edge_serial = usb_get_serial_data(serial);
825 if (edge_serial == NULL) {
826 return -ENODEV;
827 }
828 if (edge_serial->interrupt_in_buffer == NULL) {
829 struct usb_serial_port *port0 = serial->port[0];
830
831 /* not set up yet, so do it now */
832 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
833 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
834 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
835 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
836 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
837 edge_serial->read_urb = port0->read_urb;
838 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
839
840 /* set up our interrupt urb */
841 usb_fill_int_urb(edge_serial->interrupt_read_urb,
842 serial->dev,
843 usb_rcvintpipe(serial->dev,
844 port0->interrupt_in_endpointAddress),
845 port0->interrupt_in_buffer,
846 edge_serial->interrupt_read_urb->transfer_buffer_length,
847 edge_interrupt_callback, edge_serial,
848 edge_serial->interrupt_read_urb->interval);
849
850 /* set up our bulk in urb */
851 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
852 usb_rcvbulkpipe(serial->dev,
853 port0->bulk_in_endpointAddress),
854 port0->bulk_in_buffer,
855 edge_serial->read_urb->transfer_buffer_length,
856 edge_bulk_in_callback, edge_serial);
857 edge_serial->read_in_progress = false;
858
859 /* start interrupt read for this edgeport
860 * this interrupt will continue as long as the edgeport is connected */
861 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
862 if (response) {
863 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __func__, response);
864 }
865 }
866
867 /* initialize our wait queues */
868 init_waitqueue_head(&edge_port->wait_open);
869 init_waitqueue_head(&edge_port->wait_chase);
870 init_waitqueue_head(&edge_port->delta_msr_wait);
871 init_waitqueue_head(&edge_port->wait_command);
872
873 /* initialize our icount structure */
874 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
875
876 /* initialize our port settings */
877 edge_port->txCredits = 0; /* Can't send any data yet */
878 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */
879 edge_port->chaseResponsePending = false;
880
881 /* send a open port command */
882 edge_port->openPending = true;
883 edge_port->open = false;
884 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
885
886 if (response < 0) {
887 dev_err(&port->dev, "%s - error sending open port command\n", __func__);
888 edge_port->openPending = false;
889 return -ENODEV;
890 }
891
892 /* now wait for the port to be completely opened */
893 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, OPEN_TIMEOUT);
894
895 if (!edge_port->open) {
896 /* open timed out */
897 dbg("%s - open timedout", __func__);
898 edge_port->openPending = false;
899 return -ENODEV;
900 }
901
902 /* create the txfifo */
903 edge_port->txfifo.head = 0;
904 edge_port->txfifo.tail = 0;
905 edge_port->txfifo.count = 0;
906 edge_port->txfifo.size = edge_port->maxTxCredits;
907 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
908
909 if (!edge_port->txfifo.fifo) {
910 dbg("%s - no memory", __func__);
911 edge_close (port, filp);
912 return -ENOMEM;
913 }
914
915 /* Allocate a URB for the write */
916 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
917 edge_port->write_in_progress = false;
918
919 if (!edge_port->write_urb) {
920 dbg("%s - no memory", __func__);
921 edge_close (port, filp);
922 return -ENOMEM;
923 }
924
925 dbg("%s(%d) - Initialize TX fifo to %d bytes", __func__, port->number, edge_port->maxTxCredits);
926
927 dbg("%s exited", __func__);
928
929 return 0;
930 }
931
932
933 /************************************************************************
934 *
935 * block_until_chase_response
936 *
937 * This function will block the close until one of the following:
938 * 1. Response to our Chase comes from Edgeport
939 * 2. A timeout of 10 seconds without activity has expired
940 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
941 *
942 ************************************************************************/
943 static void block_until_chase_response(struct edgeport_port *edge_port)
944 {
945 DEFINE_WAIT(wait);
946 __u16 lastCredits;
947 int timeout = 1*HZ;
948 int loop = 10;
949
950 while (1) {
951 // Save Last credits
952 lastCredits = edge_port->txCredits;
953
954 // Did we get our Chase response
955 if (!edge_port->chaseResponsePending) {
956 dbg("%s - Got Chase Response", __func__);
957
958 // did we get all of our credit back?
959 if (edge_port->txCredits == edge_port->maxTxCredits ) {
960 dbg("%s - Got all credits", __func__);
961 return;
962 }
963 }
964
965 // Block the thread for a while
966 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
967 schedule_timeout(timeout);
968 finish_wait(&edge_port->wait_chase, &wait);
969
970 if (lastCredits == edge_port->txCredits) {
971 // No activity.. count down.
972 loop--;
973 if (loop == 0) {
974 edge_port->chaseResponsePending = false;
975 dbg("%s - Chase TIMEOUT", __func__);
976 return;
977 }
978 } else {
979 // Reset timeout value back to 10 seconds
980 dbg("%s - Last %d, Current %d", __func__, lastCredits, edge_port->txCredits);
981 loop = 10;
982 }
983 }
984 }
985
986
987 /************************************************************************
988 *
989 * block_until_tx_empty
990 *
991 * This function will block the close until one of the following:
992 * 1. TX count are 0
993 * 2. The edgeport has stopped
994 * 3. A timeout of 3 seconds without activity has expired
995 *
996 ************************************************************************/
997 static void block_until_tx_empty (struct edgeport_port *edge_port)
998 {
999 DEFINE_WAIT(wait);
1000 struct TxFifo *fifo = &edge_port->txfifo;
1001 __u32 lastCount;
1002 int timeout = HZ/10;
1003 int loop = 30;
1004
1005 while (1) {
1006 // Save Last count
1007 lastCount = fifo->count;
1008
1009 // Is the Edgeport Buffer empty?
1010 if (lastCount == 0) {
1011 dbg("%s - TX Buffer Empty", __func__);
1012 return;
1013 }
1014
1015 // Block the thread for a while
1016 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
1017 schedule_timeout(timeout);
1018 finish_wait(&edge_port->wait_chase, &wait);
1019
1020 dbg("%s wait", __func__);
1021
1022 if (lastCount == fifo->count) {
1023 // No activity.. count down.
1024 loop--;
1025 if (loop == 0) {
1026 dbg("%s - TIMEOUT", __func__);
1027 return;
1028 }
1029 } else {
1030 // Reset timeout value back to seconds
1031 loop = 30;
1032 }
1033 }
1034 }
1035
1036
1037 /*****************************************************************************
1038 * edge_close
1039 * this function is called by the tty driver when a port is closed
1040 *****************************************************************************/
1041 static void edge_close (struct usb_serial_port *port, struct file * filp)
1042 {
1043 struct edgeport_serial *edge_serial;
1044 struct edgeport_port *edge_port;
1045 int status;
1046
1047 dbg("%s - port %d", __func__, port->number);
1048
1049 edge_serial = usb_get_serial_data(port->serial);
1050 edge_port = usb_get_serial_port_data(port);
1051 if ((edge_serial == NULL) || (edge_port == NULL))
1052 return;
1053
1054 // block until tx is empty
1055 block_until_tx_empty(edge_port);
1056
1057 edge_port->closePending = true;
1058
1059 if ((!edge_serial->is_epic) ||
1060 ((edge_serial->is_epic) &&
1061 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1062 /* flush and chase */
1063 edge_port->chaseResponsePending = true;
1064
1065 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1066 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1067 if (status == 0) {
1068 // block until chase finished
1069 block_until_chase_response(edge_port);
1070 } else {
1071 edge_port->chaseResponsePending = false;
1072 }
1073 }
1074
1075 if ((!edge_serial->is_epic) ||
1076 ((edge_serial->is_epic) &&
1077 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1078 /* close the port */
1079 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1080 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1081 }
1082
1083 //port->close = true;
1084 edge_port->closePending = false;
1085 edge_port->open = false;
1086 edge_port->openPending = false;
1087
1088 usb_kill_urb(edge_port->write_urb);
1089
1090 if (edge_port->write_urb) {
1091 /* if this urb had a transfer buffer already (old transfer) free it */
1092 kfree(edge_port->write_urb->transfer_buffer);
1093 usb_free_urb(edge_port->write_urb);
1094 edge_port->write_urb = NULL;
1095 }
1096 kfree(edge_port->txfifo.fifo);
1097 edge_port->txfifo.fifo = NULL;
1098
1099 dbg("%s exited", __func__);
1100 }
1101
1102 /*****************************************************************************
1103 * SerialWrite
1104 * this function is called by the tty driver when data should be written to
1105 * the port.
1106 * If successful, we return the number of bytes written, otherwise we return
1107 * a negative error number.
1108 *****************************************************************************/
1109 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1110 {
1111 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1112 struct TxFifo *fifo;
1113 int copySize;
1114 int bytesleft;
1115 int firsthalf;
1116 int secondhalf;
1117 unsigned long flags;
1118
1119 dbg("%s - port %d", __func__, port->number);
1120
1121 if (edge_port == NULL)
1122 return -ENODEV;
1123
1124 // get a pointer to the Tx fifo
1125 fifo = &edge_port->txfifo;
1126
1127 spin_lock_irqsave(&edge_port->ep_lock, flags);
1128
1129 // calculate number of bytes to put in fifo
1130 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1131
1132 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __func__,
1133 port->number, count, edge_port->txCredits - fifo->count, copySize);
1134
1135 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1136 if (copySize == 0) {
1137 dbg("%s - copySize = Zero", __func__);
1138 goto finish_write;
1139 }
1140
1141 // queue the data
1142 // since we can never overflow the buffer we do not have to check for full condition
1143
1144 // the copy is done is two parts -- first fill to the end of the buffer
1145 // then copy the reset from the start of the buffer
1146
1147 bytesleft = fifo->size - fifo->head;
1148 firsthalf = min (bytesleft, copySize);
1149 dbg("%s - copy %d bytes of %d into fifo ", __func__, firsthalf, bytesleft);
1150
1151 /* now copy our data */
1152 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1153 usb_serial_debug_data(debug, &port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1154
1155 // update the index and size
1156 fifo->head += firsthalf;
1157 fifo->count += firsthalf;
1158
1159 // wrap the index
1160 if (fifo->head == fifo->size) {
1161 fifo->head = 0;
1162 }
1163
1164 secondhalf = copySize-firsthalf;
1165
1166 if (secondhalf) {
1167 dbg("%s - copy rest of data %d", __func__, secondhalf);
1168 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1169 usb_serial_debug_data(debug, &port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1170 // update the index and size
1171 fifo->count += secondhalf;
1172 fifo->head += secondhalf;
1173 // No need to check for wrap since we can not get to end of fifo in this part
1174 }
1175
1176 finish_write:
1177 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1178
1179 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1180
1181 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__, copySize, edge_port->txCredits, fifo->count);
1182
1183 return copySize;
1184 }
1185
1186
1187 /************************************************************************
1188 *
1189 * send_more_port_data()
1190 *
1191 * This routine attempts to write additional UART transmit data
1192 * to a port over the USB bulk pipe. It is called (1) when new
1193 * data has been written to a port's TxBuffer from higher layers
1194 * (2) when the peripheral sends us additional TxCredits indicating
1195 * that it can accept more Tx data for a given port; and (3) when
1196 * a bulk write completes successfully and we want to see if we
1197 * can transmit more.
1198 *
1199 ************************************************************************/
1200 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1201 {
1202 struct TxFifo *fifo = &edge_port->txfifo;
1203 struct urb *urb;
1204 unsigned char *buffer;
1205 int status;
1206 int count;
1207 int bytesleft;
1208 int firsthalf;
1209 int secondhalf;
1210 unsigned long flags;
1211
1212 dbg("%s(%d)", __func__, edge_port->port->number);
1213
1214 spin_lock_irqsave(&edge_port->ep_lock, flags);
1215
1216 if (edge_port->write_in_progress ||
1217 !edge_port->open ||
1218 (fifo->count == 0)) {
1219 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __func__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1220 goto exit_send;
1221 }
1222
1223 // since the amount of data in the fifo will always fit into the
1224 // edgeport buffer we do not need to check the write length
1225
1226 // Do we have enough credits for this port to make it worthwhile
1227 // to bother queueing a write. If it's too small, say a few bytes,
1228 // it's better to wait for more credits so we can do a larger
1229 // write.
1230 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1231 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __func__, edge_port->port->number, fifo->count, edge_port->txCredits );
1232 goto exit_send;
1233 }
1234
1235 // lock this write
1236 edge_port->write_in_progress = true;
1237
1238 // get a pointer to the write_urb
1239 urb = edge_port->write_urb;
1240
1241 /* make sure transfer buffer is freed */
1242 kfree(urb->transfer_buffer);
1243 urb->transfer_buffer = NULL;
1244
1245 /* build the data header for the buffer and port that we are about to send out */
1246 count = fifo->count;
1247 buffer = kmalloc (count+2, GFP_ATOMIC);
1248 if (buffer == NULL) {
1249 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __func__);
1250 edge_port->write_in_progress = false;
1251 goto exit_send;
1252 }
1253 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1254 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1255
1256 /* now copy our data */
1257 bytesleft = fifo->size - fifo->tail;
1258 firsthalf = min (bytesleft, count);
1259 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1260 fifo->tail += firsthalf;
1261 fifo->count -= firsthalf;
1262 if (fifo->tail == fifo->size) {
1263 fifo->tail = 0;
1264 }
1265
1266 secondhalf = count-firsthalf;
1267 if (secondhalf) {
1268 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1269 fifo->tail += secondhalf;
1270 fifo->count -= secondhalf;
1271 }
1272
1273 if (count)
1274 usb_serial_debug_data(debug, &edge_port->port->dev, __func__, count, &buffer[2]);
1275
1276 /* fill up the urb with all of our data and submit it */
1277 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1278 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1279 buffer, count+2, edge_bulk_out_data_callback, edge_port);
1280
1281 /* decrement the number of credits we have by the number we just sent */
1282 edge_port->txCredits -= count;
1283 edge_port->icount.tx += count;
1284
1285 urb->dev = edge_serial->serial->dev;
1286 status = usb_submit_urb(urb, GFP_ATOMIC);
1287 if (status) {
1288 /* something went wrong */
1289 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __func__, status);
1290 edge_port->write_in_progress = false;
1291
1292 /* revert the credits as something bad happened. */
1293 edge_port->txCredits += count;
1294 edge_port->icount.tx -= count;
1295 }
1296 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __func__, count, edge_port->txCredits, fifo->count);
1297
1298 exit_send:
1299 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1300 }
1301
1302
1303 /*****************************************************************************
1304 * edge_write_room
1305 * this function is called by the tty driver when it wants to know how many
1306 * bytes of data we can accept for a specific port.
1307 * If successful, we return the amount of room that we have for this port
1308 * (the txCredits),
1309 * Otherwise we return a negative error number.
1310 *****************************************************************************/
1311 static int edge_write_room (struct usb_serial_port *port)
1312 {
1313 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1314 int room;
1315 unsigned long flags;
1316
1317 dbg("%s", __func__);
1318
1319 if (edge_port == NULL)
1320 return -ENODEV;
1321 if (edge_port->closePending)
1322 return -ENODEV;
1323
1324 dbg("%s - port %d", __func__, port->number);
1325
1326 if (!edge_port->open) {
1327 dbg("%s - port not opened", __func__);
1328 return -EINVAL;
1329 }
1330
1331 // total of both buffers is still txCredit
1332 spin_lock_irqsave(&edge_port->ep_lock, flags);
1333 room = edge_port->txCredits - edge_port->txfifo.count;
1334 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1335
1336 dbg("%s - returns %d", __func__, room);
1337 return room;
1338 }
1339
1340
1341 /*****************************************************************************
1342 * edge_chars_in_buffer
1343 * this function is called by the tty driver when it wants to know how many
1344 * bytes of data we currently have outstanding in the port (data that has
1345 * been written, but hasn't made it out the port yet)
1346 * If successful, we return the number of bytes left to be written in the
1347 * system,
1348 * Otherwise we return a negative error number.
1349 *****************************************************************************/
1350 static int edge_chars_in_buffer (struct usb_serial_port *port)
1351 {
1352 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1353 int num_chars;
1354 unsigned long flags;
1355
1356 dbg("%s", __func__);
1357
1358 if (edge_port == NULL)
1359 return -ENODEV;
1360 if (edge_port->closePending)
1361 return -ENODEV;
1362
1363 if (!edge_port->open) {
1364 dbg("%s - port not opened", __func__);
1365 return -EINVAL;
1366 }
1367
1368 spin_lock_irqsave(&edge_port->ep_lock, flags);
1369 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1370 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1371 if (num_chars) {
1372 dbg("%s(port %d) - returns %d", __func__, port->number, num_chars);
1373 }
1374
1375 return num_chars;
1376 }
1377
1378
1379 /*****************************************************************************
1380 * SerialThrottle
1381 * this function is called by the tty driver when it wants to stop the data
1382 * being read from the port.
1383 *****************************************************************************/
1384 static void edge_throttle (struct usb_serial_port *port)
1385 {
1386 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1387 struct tty_struct *tty;
1388 int status;
1389
1390 dbg("%s - port %d", __func__, port->number);
1391
1392 if (edge_port == NULL)
1393 return;
1394
1395 if (!edge_port->open) {
1396 dbg("%s - port not opened", __func__);
1397 return;
1398 }
1399
1400 tty = port->tty;
1401 if (!tty) {
1402 dbg ("%s - no tty available", __func__);
1403 return;
1404 }
1405
1406 /* if we are implementing XON/XOFF, send the stop character */
1407 if (I_IXOFF(tty)) {
1408 unsigned char stop_char = STOP_CHAR(tty);
1409 status = edge_write (port, &stop_char, 1);
1410 if (status <= 0) {
1411 return;
1412 }
1413 }
1414
1415 /* if we are implementing RTS/CTS, toggle that line */
1416 if (tty->termios->c_cflag & CRTSCTS) {
1417 edge_port->shadowMCR &= ~MCR_RTS;
1418 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1419 if (status != 0) {
1420 return;
1421 }
1422 }
1423
1424 return;
1425 }
1426
1427
1428 /*****************************************************************************
1429 * edge_unthrottle
1430 * this function is called by the tty driver when it wants to resume the data
1431 * being read from the port (called after SerialThrottle is called)
1432 *****************************************************************************/
1433 static void edge_unthrottle (struct usb_serial_port *port)
1434 {
1435 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1436 struct tty_struct *tty;
1437 int status;
1438
1439 dbg("%s - port %d", __func__, port->number);
1440
1441 if (edge_port == NULL)
1442 return;
1443
1444 if (!edge_port->open) {
1445 dbg("%s - port not opened", __func__);
1446 return;
1447 }
1448
1449 tty = port->tty;
1450 if (!tty) {
1451 dbg ("%s - no tty available", __func__);
1452 return;
1453 }
1454
1455 /* if we are implementing XON/XOFF, send the start character */
1456 if (I_IXOFF(tty)) {
1457 unsigned char start_char = START_CHAR(tty);
1458 status = edge_write (port, &start_char, 1);
1459 if (status <= 0) {
1460 return;
1461 }
1462 }
1463
1464 /* if we are implementing RTS/CTS, toggle that line */
1465 if (tty->termios->c_cflag & CRTSCTS) {
1466 edge_port->shadowMCR |= MCR_RTS;
1467 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1468 if (status != 0) {
1469 return;
1470 }
1471 }
1472
1473 return;
1474 }
1475
1476
1477 /*****************************************************************************
1478 * SerialSetTermios
1479 * this function is called by the tty driver when it wants to change the termios structure
1480 *****************************************************************************/
1481 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1482 {
1483 /* FIXME: This function appears unused ?? */
1484 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1485 struct tty_struct *tty = port->tty;
1486 unsigned int cflag;
1487
1488 cflag = tty->termios->c_cflag;
1489 dbg("%s - clfag %08x iflag %08x", __func__,
1490 tty->termios->c_cflag, tty->termios->c_iflag);
1491 dbg("%s - old clfag %08x old iflag %08x", __func__,
1492 old_termios->c_cflag, old_termios->c_iflag);
1493
1494 dbg("%s - port %d", __func__, port->number);
1495
1496 if (edge_port == NULL)
1497 return;
1498
1499 if (!edge_port->open) {
1500 dbg("%s - port not opened", __func__);
1501 return;
1502 }
1503
1504 /* change the port settings to the new ones specified */
1505 change_port_settings (edge_port, old_termios);
1506
1507 return;
1508 }
1509
1510
1511 /*****************************************************************************
1512 * get_lsr_info - get line status register info
1513 *
1514 * Purpose: Let user call ioctl() to get info when the UART physically
1515 * is emptied. On bus types like RS485, the transmitter must
1516 * release the bus after transmitting. This must be done when
1517 * the transmit shift register is empty, not be done when the
1518 * transmit holding register is empty. This functionality
1519 * allows an RS485 driver to be written in user space.
1520 *****************************************************************************/
1521 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1522 {
1523 unsigned int result = 0;
1524 unsigned long flags;
1525
1526 spin_lock_irqsave(&edge_port->ep_lock, flags);
1527 if (edge_port->maxTxCredits == edge_port->txCredits &&
1528 edge_port->txfifo.count == 0) {
1529 dbg("%s -- Empty", __func__);
1530 result = TIOCSER_TEMT;
1531 }
1532 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1533
1534 if (copy_to_user(value, &result, sizeof(int)))
1535 return -EFAULT;
1536 return 0;
1537 }
1538
1539 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1540 {
1541 unsigned int result = 0;
1542 struct tty_struct *tty = edge_port->port->tty;
1543
1544 if (!tty)
1545 return -ENOIOCTLCMD;
1546
1547 result = tty->read_cnt;
1548
1549 dbg("%s(%d) = %d", __func__, edge_port->port->number, result);
1550 if (copy_to_user(value, &result, sizeof(int)))
1551 return -EFAULT;
1552 //return 0;
1553 return -ENOIOCTLCMD;
1554 }
1555
1556 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1557 {
1558 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1559 unsigned int mcr;
1560
1561 dbg("%s - port %d", __func__, port->number);
1562
1563 mcr = edge_port->shadowMCR;
1564 if (set & TIOCM_RTS)
1565 mcr |= MCR_RTS;
1566 if (set & TIOCM_DTR)
1567 mcr |= MCR_DTR;
1568 if (set & TIOCM_LOOP)
1569 mcr |= MCR_LOOPBACK;
1570
1571 if (clear & TIOCM_RTS)
1572 mcr &= ~MCR_RTS;
1573 if (clear & TIOCM_DTR)
1574 mcr &= ~MCR_DTR;
1575 if (clear & TIOCM_LOOP)
1576 mcr &= ~MCR_LOOPBACK;
1577
1578 edge_port->shadowMCR = mcr;
1579
1580 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1581
1582 return 0;
1583 }
1584
1585 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1586 {
1587 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1588 unsigned int result = 0;
1589 unsigned int msr;
1590 unsigned int mcr;
1591
1592 dbg("%s - port %d", __func__, port->number);
1593
1594 msr = edge_port->shadowMSR;
1595 mcr = edge_port->shadowMCR;
1596 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1597 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1598 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1599 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1600 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1601 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1602
1603
1604 dbg("%s -- %x", __func__, result);
1605
1606 return result;
1607 }
1608
1609 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1610 {
1611 struct serial_struct tmp;
1612
1613 if (!retinfo)
1614 return -EFAULT;
1615
1616 memset(&tmp, 0, sizeof(tmp));
1617
1618 tmp.type = PORT_16550A;
1619 tmp.line = edge_port->port->serial->minor;
1620 tmp.port = edge_port->port->number;
1621 tmp.irq = 0;
1622 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1623 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1624 tmp.baud_base = 9600;
1625 tmp.close_delay = 5*HZ;
1626 tmp.closing_wait = 30*HZ;
1627 // tmp.custom_divisor = state->custom_divisor;
1628 // tmp.hub6 = state->hub6;
1629 // tmp.io_type = state->io_type;
1630
1631 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1632 return -EFAULT;
1633 return 0;
1634 }
1635
1636
1637
1638 /*****************************************************************************
1639 * SerialIoctl
1640 * this function handles any ioctl calls to the driver
1641 *****************************************************************************/
1642 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1643 {
1644 DEFINE_WAIT(wait);
1645 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1646 struct async_icount cnow;
1647 struct async_icount cprev;
1648 struct serial_icounter_struct icount;
1649
1650 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1651
1652 switch (cmd) {
1653 // return number of bytes available
1654 case TIOCINQ:
1655 dbg("%s (%d) TIOCINQ", __func__, port->number);
1656 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1657 break;
1658
1659 case TIOCSERGETLSR:
1660 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
1661 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1662 return 0;
1663
1664 case TIOCGSERIAL:
1665 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
1666 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1667
1668 case TIOCSSERIAL:
1669 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
1670 break;
1671
1672 case TIOCMIWAIT:
1673 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
1674 cprev = edge_port->icount;
1675 while (1) {
1676 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1677 schedule();
1678 finish_wait(&edge_port->delta_msr_wait, &wait);
1679 /* see if a signal did it */
1680 if (signal_pending(current))
1681 return -ERESTARTSYS;
1682 cnow = edge_port->icount;
1683 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1684 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1685 return -EIO; /* no change => error */
1686 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1687 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1688 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1689 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1690 return 0;
1691 }
1692 cprev = cnow;
1693 }
1694 /* NOTREACHED */
1695 break;
1696
1697 case TIOCGICOUNT:
1698 cnow = edge_port->icount;
1699 memset(&icount, 0, sizeof(icount));
1700 icount.cts = cnow.cts;
1701 icount.dsr = cnow.dsr;
1702 icount.rng = cnow.rng;
1703 icount.dcd = cnow.dcd;
1704 icount.rx = cnow.rx;
1705 icount.tx = cnow.tx;
1706 icount.frame = cnow.frame;
1707 icount.overrun = cnow.overrun;
1708 icount.parity = cnow.parity;
1709 icount.brk = cnow.brk;
1710 icount.buf_overrun = cnow.buf_overrun;
1711
1712 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, port->number, icount.rx, icount.tx );
1713 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1714 return -EFAULT;
1715 return 0;
1716 }
1717
1718 return -ENOIOCTLCMD;
1719 }
1720
1721
1722 /*****************************************************************************
1723 * SerialBreak
1724 * this function sends a break to the port
1725 *****************************************************************************/
1726 static void edge_break (struct usb_serial_port *port, int break_state)
1727 {
1728 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1729 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1730 int status;
1731
1732 if ((!edge_serial->is_epic) ||
1733 ((edge_serial->is_epic) &&
1734 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1735 /* flush and chase */
1736 edge_port->chaseResponsePending = true;
1737
1738 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1739 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1740 if (status == 0) {
1741 // block until chase finished
1742 block_until_chase_response(edge_port);
1743 } else {
1744 edge_port->chaseResponsePending = false;
1745 }
1746 }
1747
1748 if ((!edge_serial->is_epic) ||
1749 ((edge_serial->is_epic) &&
1750 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1751 if (break_state == -1) {
1752 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1753 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1754 } else {
1755 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1756 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1757 }
1758 if (status) {
1759 dbg("%s - error sending break set/clear command.", __func__);
1760 }
1761 }
1762
1763 return;
1764 }
1765
1766
1767 /*****************************************************************************
1768 * process_rcvd_data
1769 * this function handles the data received on the bulk in pipe.
1770 *****************************************************************************/
1771 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1772 {
1773 struct usb_serial_port *port;
1774 struct edgeport_port *edge_port;
1775 struct tty_struct *tty;
1776 __u16 lastBufferLength;
1777 __u16 rxLen;
1778
1779 dbg("%s", __func__);
1780
1781 lastBufferLength = bufferLength + 1;
1782
1783 while (bufferLength > 0) {
1784 /* failsafe incase we get a message that we don't understand */
1785 if (lastBufferLength == bufferLength) {
1786 dbg("%s - stuck in loop, exiting it.", __func__);
1787 break;
1788 }
1789 lastBufferLength = bufferLength;
1790
1791 switch (edge_serial->rxState) {
1792 case EXPECT_HDR1:
1793 edge_serial->rxHeader1 = *buffer;
1794 ++buffer;
1795 --bufferLength;
1796
1797 if (bufferLength == 0) {
1798 edge_serial->rxState = EXPECT_HDR2;
1799 break;
1800 }
1801 /* otherwise, drop on through */
1802
1803 case EXPECT_HDR2:
1804 edge_serial->rxHeader2 = *buffer;
1805 ++buffer;
1806 --bufferLength;
1807
1808 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1809
1810 // Process depending on whether this header is
1811 // data or status
1812
1813 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1814 // Decode this status header and goto EXPECT_HDR1 (if we
1815 // can process the status with only 2 bytes), or goto
1816 // EXPECT_HDR3 to get the third byte.
1817
1818 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1819 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
1820
1821 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
1822 // This status needs additional bytes. Save what we have
1823 // and then wait for more data.
1824 edge_serial->rxStatusParam = edge_serial->rxHeader2;
1825
1826 edge_serial->rxState = EXPECT_HDR3;
1827 break;
1828 }
1829
1830 // We have all the header bytes, process the status now
1831 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
1832 edge_serial->rxState = EXPECT_HDR1;
1833 break;
1834 } else {
1835 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1836 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
1837
1838 dbg("%s - Data for Port %u Len %u", __func__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
1839
1840 //ASSERT( DevExt->RxPort < DevExt->NumPorts );
1841 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
1842
1843 if (bufferLength == 0 ) {
1844 edge_serial->rxState = EXPECT_DATA;
1845 break;
1846 }
1847 // Else, drop through
1848 }
1849
1850 case EXPECT_DATA: // Expect data
1851
1852 if (bufferLength < edge_serial->rxBytesRemaining) {
1853 rxLen = bufferLength;
1854 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer
1855 } else {
1856 // BufLen >= RxBytesRemaining
1857 rxLen = edge_serial->rxBytesRemaining;
1858 edge_serial->rxState = EXPECT_HDR1; // Start another header next time
1859 }
1860
1861 bufferLength -= rxLen;
1862 edge_serial->rxBytesRemaining -= rxLen;
1863
1864 /* spit this data back into the tty driver if this port is open */
1865 if (rxLen) {
1866 port = edge_serial->serial->port[edge_serial->rxPort];
1867 edge_port = usb_get_serial_port_data(port);
1868 if (edge_port->open) {
1869 tty = edge_port->port->tty;
1870 if (tty) {
1871 dbg("%s - Sending %d bytes to TTY for port %d", __func__, rxLen, edge_serial->rxPort);
1872 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1873 }
1874 edge_port->icount.rx += rxLen;
1875 }
1876 buffer += rxLen;
1877 }
1878
1879 break;
1880
1881 case EXPECT_HDR3: // Expect 3rd byte of status header
1882 edge_serial->rxHeader3 = *buffer;
1883 ++buffer;
1884 --bufferLength;
1885
1886 // We have all the header bytes, process the status now
1887 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
1888 edge_serial->rxState = EXPECT_HDR1;
1889 break;
1890
1891 }
1892 }
1893 }
1894
1895
1896 /*****************************************************************************
1897 * process_rcvd_status
1898 * this function handles the any status messages received on the bulk in pipe.
1899 *****************************************************************************/
1900 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
1901 {
1902 struct usb_serial_port *port;
1903 struct edgeport_port *edge_port;
1904 __u8 code = edge_serial->rxStatusCode;
1905
1906 /* switch the port pointer to the one being currently talked about */
1907 port = edge_serial->serial->port[edge_serial->rxPort];
1908 edge_port = usb_get_serial_port_data(port);
1909 if (edge_port == NULL) {
1910 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __func__, edge_serial->rxPort);
1911 return;
1912 }
1913
1914 dbg("%s - port %d", __func__, edge_serial->rxPort);
1915
1916 if (code == IOSP_EXT_STATUS) {
1917 switch (byte2) {
1918 case IOSP_EXT_STATUS_CHASE_RSP:
1919 // we want to do EXT status regardless of port open/closed
1920 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __func__, edge_serial->rxPort, byte3 );
1921 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
1922 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
1923 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
1924 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
1925 // like wait longer in block_until_chase_response, but for now we don't.
1926 edge_port->chaseResponsePending = false;
1927 wake_up (&edge_port->wait_chase);
1928 return;
1929
1930 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1931 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__, edge_serial->rxPort, byte3 );
1932 //Port->RxCheckRsp = true;
1933 return;
1934 }
1935 }
1936
1937 if (code == IOSP_STATUS_OPEN_RSP) {
1938 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1939 edge_port->maxTxCredits = edge_port->txCredits;
1940 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1941 handle_new_msr (edge_port, byte2);
1942
1943 /* send the current line settings to the port so we are in sync with any further termios calls */
1944 if (edge_port->port->tty)
1945 change_port_settings (edge_port, edge_port->port->tty->termios);
1946
1947 /* we have completed the open */
1948 edge_port->openPending = false;
1949 edge_port->open = true;
1950 wake_up(&edge_port->wait_open);
1951 return;
1952 }
1953
1954 // If port is closed, silently discard all rcvd status. We can
1955 // have cases where buffered status is received AFTER the close
1956 // port command is sent to the Edgeport.
1957 if (!edge_port->open || edge_port->closePending) {
1958 return;
1959 }
1960
1961 switch (code) {
1962 // Not currently sent by Edgeport
1963 case IOSP_STATUS_LSR:
1964 dbg("%s - Port %u LSR Status = %02x", __func__, edge_serial->rxPort, byte2);
1965 handle_new_lsr(edge_port, false, byte2, 0);
1966 break;
1967
1968 case IOSP_STATUS_LSR_DATA:
1969 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __func__, edge_serial->rxPort, byte2, byte3);
1970 // byte2 is LSR Register
1971 // byte3 is broken data byte
1972 handle_new_lsr(edge_port, true, byte2, byte3);
1973 break;
1974 //
1975 // case IOSP_EXT_4_STATUS:
1976 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __func__, edge_serial->rxPort, byte2, byte3);
1977 // break;
1978 //
1979 case IOSP_STATUS_MSR:
1980 dbg("%s - Port %u MSR Status = %02x", __func__, edge_serial->rxPort, byte2);
1981
1982 // Process this new modem status and generate appropriate
1983 // events, etc, based on the new status. This routine
1984 // also saves the MSR in Port->ShadowMsr.
1985 handle_new_msr(edge_port, byte2);
1986 break;
1987
1988 default:
1989 dbg("%s - Unrecognized IOSP status code %u\n", __func__, code);
1990 break;
1991 }
1992
1993 return;
1994 }
1995
1996
1997 /*****************************************************************************
1998 * edge_tty_recv
1999 * this function passes data on to the tty flip buffer
2000 *****************************************************************************/
2001 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2002 {
2003 int cnt;
2004
2005 do {
2006 cnt = tty_buffer_request_room(tty, length);
2007 if (cnt < length) {
2008 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2009 __func__, length - cnt);
2010 if(cnt == 0)
2011 break;
2012 }
2013 tty_insert_flip_string(tty, data, cnt);
2014 data += cnt;
2015 length -= cnt;
2016 } while (length > 0);
2017
2018 tty_flip_buffer_push(tty);
2019 }
2020
2021
2022 /*****************************************************************************
2023 * handle_new_msr
2024 * this function handles any change to the msr register for a port.
2025 *****************************************************************************/
2026 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2027 {
2028 struct async_icount *icount;
2029
2030 dbg("%s %02x", __func__, newMsr);
2031
2032 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2033 icount = &edge_port->icount;
2034
2035 /* update input line counters */
2036 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2037 icount->cts++;
2038 }
2039 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2040 icount->dsr++;
2041 }
2042 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2043 icount->dcd++;
2044 }
2045 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2046 icount->rng++;
2047 }
2048 wake_up_interruptible(&edge_port->delta_msr_wait);
2049 }
2050
2051 /* Save the new modem status */
2052 edge_port->shadowMSR = newMsr & 0xf0;
2053
2054 return;
2055 }
2056
2057
2058 /*****************************************************************************
2059 * handle_new_lsr
2060 * this function handles any change to the lsr register for a port.
2061 *****************************************************************************/
2062 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2063 {
2064 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2065 struct async_icount *icount;
2066
2067 dbg("%s - %02x", __func__, newLsr);
2068
2069 edge_port->shadowLSR = lsr;
2070
2071 if (newLsr & LSR_BREAK) {
2072 //
2073 // Parity and Framing errors only count if they
2074 // occur exclusive of a break being
2075 // received.
2076 //
2077 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2078 }
2079
2080 /* Place LSR data byte into Rx buffer */
2081 if (lsrData && edge_port->port->tty)
2082 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2083
2084 /* update input line counters */
2085 icount = &edge_port->icount;
2086 if (newLsr & LSR_BREAK) {
2087 icount->brk++;
2088 }
2089 if (newLsr & LSR_OVER_ERR) {
2090 icount->overrun++;
2091 }
2092 if (newLsr & LSR_PAR_ERR) {
2093 icount->parity++;
2094 }
2095 if (newLsr & LSR_FRM_ERR) {
2096 icount->frame++;
2097 }
2098
2099 return;
2100 }
2101
2102
2103 /****************************************************************************
2104 * sram_write
2105 * writes a number of bytes to the Edgeport device's sram starting at the
2106 * given address.
2107 * If successful returns the number of bytes written, otherwise it returns
2108 * a negative error number of the problem.
2109 ****************************************************************************/
2110 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, const __u8 *data)
2111 {
2112 int result;
2113 __u16 current_length;
2114 unsigned char *transfer_buffer;
2115
2116 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2117
2118 transfer_buffer = kmalloc (64, GFP_KERNEL);
2119 if (!transfer_buffer) {
2120 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __func__, 64);
2121 return -ENOMEM;
2122 }
2123
2124 /* need to split these writes up into 64 byte chunks */
2125 result = 0;
2126 while (length > 0) {
2127 if (length > 64) {
2128 current_length = 64;
2129 } else {
2130 current_length = length;
2131 }
2132 // dbg("%s - writing %x, %x, %d", __func__, extAddr, addr, current_length);
2133 memcpy (transfer_buffer, data, current_length);
2134 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2135 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2136 if (result < 0)
2137 break;
2138 length -= current_length;
2139 addr += current_length;
2140 data += current_length;
2141 }
2142
2143 kfree (transfer_buffer);
2144 return result;
2145 }
2146
2147
2148 /****************************************************************************
2149 * rom_write
2150 * writes a number of bytes to the Edgeport device's ROM starting at the
2151 * given address.
2152 * If successful returns the number of bytes written, otherwise it returns
2153 * a negative error number of the problem.
2154 ****************************************************************************/
2155 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, const __u8 *data)
2156 {
2157 int result;
2158 __u16 current_length;
2159 unsigned char *transfer_buffer;
2160
2161 // dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2162
2163 transfer_buffer = kmalloc (64, GFP_KERNEL);
2164 if (!transfer_buffer) {
2165 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __func__, 64);
2166 return -ENOMEM;
2167 }
2168
2169 /* need to split these writes up into 64 byte chunks */
2170 result = 0;
2171 while (length > 0) {
2172 if (length > 64) {
2173 current_length = 64;
2174 } else {
2175 current_length = length;
2176 }
2177 // dbg("%s - writing %x, %x, %d", __func__, extAddr, addr, current_length);
2178 memcpy (transfer_buffer, data, current_length);
2179 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2180 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2181 if (result < 0)
2182 break;
2183 length -= current_length;
2184 addr += current_length;
2185 data += current_length;
2186 }
2187
2188 kfree (transfer_buffer);
2189 return result;
2190 }
2191
2192
2193 /****************************************************************************
2194 * rom_read
2195 * reads a number of bytes from the Edgeport device starting at the given
2196 * address.
2197 * If successful returns the number of bytes read, otherwise it returns
2198 * a negative error number of the problem.
2199 ****************************************************************************/
2200 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2201 {
2202 int result;
2203 __u16 current_length;
2204 unsigned char *transfer_buffer;
2205
2206 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2207
2208 transfer_buffer = kmalloc (64, GFP_KERNEL);
2209 if (!transfer_buffer) {
2210 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __func__, 64);
2211 return -ENOMEM;
2212 }
2213
2214 /* need to split these reads up into 64 byte chunks */
2215 result = 0;
2216 while (length > 0) {
2217 if (length > 64) {
2218 current_length = 64;
2219 } else {
2220 current_length = length;
2221 }
2222 // dbg("%s - %x, %x, %d", __func__, extAddr, addr, current_length);
2223 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2224 0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2225 if (result < 0)
2226 break;
2227 memcpy (data, transfer_buffer, current_length);
2228 length -= current_length;
2229 addr += current_length;
2230 data += current_length;
2231 }
2232
2233 kfree (transfer_buffer);
2234 return result;
2235 }
2236
2237
2238 /****************************************************************************
2239 * send_iosp_ext_cmd
2240 * Is used to send a IOSP message to the Edgeport device
2241 ****************************************************************************/
2242 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2243 {
2244 unsigned char *buffer;
2245 unsigned char *currentCommand;
2246 int length = 0;
2247 int status = 0;
2248
2249 dbg("%s - %d, %d", __func__, command, param);
2250
2251 buffer = kmalloc (10, GFP_ATOMIC);
2252 if (!buffer) {
2253 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __func__, 10);
2254 return -ENOMEM;
2255 }
2256
2257 currentCommand = buffer;
2258
2259 MAKE_CMD_EXT_CMD (&currentCommand, &length,
2260 edge_port->port->number - edge_port->port->serial->minor,
2261 command, param);
2262
2263 status = write_cmd_usb (edge_port, buffer, length);
2264 if (status) {
2265 /* something bad happened, let's free up the memory */
2266 kfree(buffer);
2267 }
2268
2269 return status;
2270 }
2271
2272
2273 /*****************************************************************************
2274 * write_cmd_usb
2275 * this function writes the given buffer out to the bulk write endpoint.
2276 *****************************************************************************/
2277 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2278 {
2279 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2280 int status = 0;
2281 struct urb *urb;
2282 int timeout;
2283
2284 usb_serial_debug_data(debug, &edge_port->port->dev, __func__, length, buffer);
2285
2286 /* Allocate our next urb */
2287 urb = usb_alloc_urb (0, GFP_ATOMIC);
2288 if (!urb)
2289 return -ENOMEM;
2290
2291 atomic_inc(&CmdUrbs);
2292 dbg("%s - ALLOCATE URB %p (outstanding %d)", __func__, urb, atomic_read(&CmdUrbs));
2293
2294 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2295 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2296 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2297
2298 edge_port->commandPending = true;
2299 status = usb_submit_urb(urb, GFP_ATOMIC);
2300
2301 if (status) {
2302 /* something went wrong */
2303 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __func__, status);
2304 usb_kill_urb(urb);
2305 usb_free_urb(urb);
2306 atomic_dec(&CmdUrbs);
2307 return status;
2308 }
2309
2310 // wait for command to finish
2311 timeout = COMMAND_TIMEOUT;
2312 #if 0
2313 wait_event (&edge_port->wait_command, !edge_port->commandPending);
2314
2315 if (edge_port->commandPending) {
2316 /* command timed out */
2317 dbg("%s - command timed out", __func__);
2318 status = -EINVAL;
2319 }
2320 #endif
2321 return status;
2322 }
2323
2324
2325 /*****************************************************************************
2326 * send_cmd_write_baud_rate
2327 * this function sends the proper command to change the baud rate of the
2328 * specified port.
2329 *****************************************************************************/
2330 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2331 {
2332 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2333 unsigned char *cmdBuffer;
2334 unsigned char *currCmd;
2335 int cmdLen = 0;
2336 int divisor;
2337 int status;
2338 unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2339
2340 if (edge_serial->is_epic &&
2341 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2342 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2343 edge_port->port->number, baudRate);
2344 return 0;
2345 }
2346
2347 dbg("%s - port = %d, baud = %d", __func__, edge_port->port->number, baudRate);
2348
2349 status = calc_baud_rate_divisor (baudRate, &divisor);
2350 if (status) {
2351 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __func__);
2352 return status;
2353 }
2354
2355 // Alloc memory for the string of commands.
2356 cmdBuffer = kmalloc (0x100, GFP_ATOMIC);
2357 if (!cmdBuffer) {
2358 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2359 return -ENOMEM;
2360 }
2361 currCmd = cmdBuffer;
2362
2363 // Enable access to divisor latch
2364 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2365
2366 // Write the divisor itself
2367 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2368 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2369
2370 // Restore original value to disable access to divisor latch
2371 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2372
2373 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2374 if (status) {
2375 /* something bad happened, let's free up the memory */
2376 kfree (cmdBuffer);
2377 }
2378
2379 return status;
2380 }
2381
2382
2383 /*****************************************************************************
2384 * calc_baud_rate_divisor
2385 * this function calculates the proper baud rate divisor for the specified
2386 * baud rate.
2387 *****************************************************************************/
2388 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2389 {
2390 int i;
2391 __u16 custom;
2392
2393
2394 dbg("%s - %d", __func__, baudrate);
2395
2396 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2397 if ( divisor_table[i].BaudRate == baudrate ) {
2398 *divisor = divisor_table[i].Divisor;
2399 return 0;
2400 }
2401 }
2402
2403 // We have tried all of the standard baud rates
2404 // lets try to calculate the divisor for this baud rate
2405 // Make sure the baud rate is reasonable
2406 if (baudrate > 50 && baudrate < 230400) {
2407 // get divisor
2408 custom = (__u16)((230400L + baudrate/2) / baudrate);
2409
2410 *divisor = custom;
2411
2412 dbg("%s - Baud %d = %d\n", __func__, baudrate, custom);
2413 return 0;
2414 }
2415
2416 return -1;
2417 }
2418
2419
2420 /*****************************************************************************
2421 * send_cmd_write_uart_register
2422 * this function builds up a uart register message and sends to to the device.
2423 *****************************************************************************/
2424 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2425 {
2426 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2427 unsigned char *cmdBuffer;
2428 unsigned char *currCmd;
2429 unsigned long cmdLen = 0;
2430 int status;
2431
2432 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2433
2434 if (edge_serial->is_epic &&
2435 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2436 regNum == MCR) {
2437 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2438 return 0;
2439 }
2440
2441 if (edge_serial->is_epic &&
2442 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2443 regNum == LCR) {
2444 dbg ("SendCmdWriteUartReg - Not writing to LCR Register");
2445 return 0;
2446 }
2447
2448 // Alloc memory for the string of commands.
2449 cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2450 if (cmdBuffer == NULL ) {
2451 return -ENOMEM;
2452 }
2453
2454 currCmd = cmdBuffer;
2455
2456 // Build a cmd in the buffer to write the given register
2457 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2458 edge_port->port->number - edge_port->port->serial->minor,
2459 regNum, regValue);
2460
2461 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2462 if (status) {
2463 /* something bad happened, let's free up the memory */
2464 kfree (cmdBuffer);
2465 }
2466
2467 return status;
2468 }
2469
2470
2471 /*****************************************************************************
2472 * change_port_settings
2473 * This routine is called to set the UART on the device to match the specified
2474 * new settings.
2475 *****************************************************************************/
2476 #ifndef CMSPAR
2477 #define CMSPAR 0
2478 #endif
2479 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
2480 {
2481 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2482 struct tty_struct *tty;
2483 int baud;
2484 unsigned cflag;
2485 __u8 mask = 0xff;
2486 __u8 lData;
2487 __u8 lParity;
2488 __u8 lStop;
2489 __u8 rxFlow;
2490 __u8 txFlow;
2491 int status;
2492
2493 dbg("%s - port %d", __func__, edge_port->port->number);
2494
2495 if (!edge_port->open &&
2496 !edge_port->openPending) {
2497 dbg("%s - port not opened", __func__);
2498 return;
2499 }
2500
2501 tty = edge_port->port->tty;
2502 if ((!tty) ||
2503 (!tty->termios)) {
2504 dbg("%s - no tty structures", __func__);
2505 return;
2506 }
2507
2508 cflag = tty->termios->c_cflag;
2509
2510 switch (cflag & CSIZE) {
2511 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __func__); break;
2512 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __func__); break;
2513 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __func__); break;
2514 default:
2515 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __func__); break;
2516 }
2517
2518 lParity = LCR_PAR_NONE;
2519 if (cflag & PARENB) {
2520 if (cflag & CMSPAR) {
2521 if (cflag & PARODD) {
2522 lParity = LCR_PAR_MARK;
2523 dbg("%s - parity = mark", __func__);
2524 } else {
2525 lParity = LCR_PAR_SPACE;
2526 dbg("%s - parity = space", __func__);
2527 }
2528 } else if (cflag & PARODD) {
2529 lParity = LCR_PAR_ODD;
2530 dbg("%s - parity = odd", __func__);
2531 } else {
2532 lParity = LCR_PAR_EVEN;
2533 dbg("%s - parity = even", __func__);
2534 }
2535 } else {
2536 dbg("%s - parity = none", __func__);
2537 }
2538
2539 if (cflag & CSTOPB) {
2540 lStop = LCR_STOP_2;
2541 dbg("%s - stop bits = 2", __func__);
2542 } else {
2543 lStop = LCR_STOP_1;
2544 dbg("%s - stop bits = 1", __func__);
2545 }
2546
2547 /* figure out the flow control settings */
2548 rxFlow = txFlow = 0x00;
2549 if (cflag & CRTSCTS) {
2550 rxFlow |= IOSP_RX_FLOW_RTS;
2551 txFlow |= IOSP_TX_FLOW_CTS;
2552 dbg("%s - RTS/CTS is enabled", __func__);
2553 } else {
2554 dbg("%s - RTS/CTS is disabled", __func__);
2555 }
2556
2557 /* if we are implementing XON/XOFF, set the start and stop character in the device */
2558 if (I_IXOFF(tty) || I_IXON(tty)) {
2559 unsigned char stop_char = STOP_CHAR(tty);
2560 unsigned char start_char = START_CHAR(tty);
2561
2562 if ((!edge_serial->is_epic) ||
2563 ((edge_serial->is_epic) &&
2564 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2565 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2566 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2567 }
2568
2569 /* if we are implementing INBOUND XON/XOFF */
2570 if (I_IXOFF(tty)) {
2571 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2572 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __func__, start_char, stop_char);
2573 } else {
2574 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2575 }
2576
2577 /* if we are implementing OUTBOUND XON/XOFF */
2578 if (I_IXON(tty)) {
2579 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2580 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __func__, start_char, stop_char);
2581 } else {
2582 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2583 }
2584 }
2585
2586 /* Set flow control to the configured value */
2587 if ((!edge_serial->is_epic) ||
2588 ((edge_serial->is_epic) &&
2589 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2590 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2591 if ((!edge_serial->is_epic) ||
2592 ((edge_serial->is_epic) &&
2593 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2594 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2595
2596
2597 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2598 edge_port->shadowLCR |= (lData | lParity | lStop);
2599
2600 edge_port->validDataMask = mask;
2601
2602 /* Send the updated LCR value to the EdgePort */
2603 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2604 if (status != 0) {
2605 return;
2606 }
2607
2608 /* set up the MCR register and send it to the EdgePort */
2609 edge_port->shadowMCR = MCR_MASTER_IE;
2610 if (cflag & CBAUD) {
2611 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2612 }
2613 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2614 if (status != 0) {
2615 return;
2616 }
2617
2618 /* Determine divisor based on baud rate */
2619 baud = tty_get_baud_rate(tty);
2620 if (!baud) {
2621 /* pick a default, any default... */
2622 baud = 9600;
2623 }
2624
2625 dbg("%s - baud rate = %d", __func__, baud);
2626 status = send_cmd_write_baud_rate (edge_port, baud);
2627 if (status == -1) {
2628 /* Speed change was not possible - put back the old speed */
2629 baud = tty_termios_baud_rate(old_termios);
2630 tty_encode_baud_rate(tty, baud, baud);
2631 }
2632 return;
2633 }
2634
2635
2636 /****************************************************************************
2637 * unicode_to_ascii
2638 * Turns a string from Unicode into ASCII.
2639 * Doesn't do a good job with any characters that are outside the normal
2640 * ASCII range, but it's only for debugging...
2641 * NOTE: expects the unicode in LE format
2642 ****************************************************************************/
2643 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size)
2644 {
2645 int i;
2646
2647 if (buflen <= 0) /* never happens, but... */
2648 return;
2649 --buflen; /* space for nul */
2650
2651 for (i = 0; i < unicode_size; i++) {
2652 if (i >= buflen)
2653 break;
2654 string[i] = (char)(le16_to_cpu(unicode[i]));
2655 }
2656 string[i] = 0x00;
2657 }
2658
2659
2660 /****************************************************************************
2661 * get_manufacturing_desc
2662 * reads in the manufacturing descriptor and stores it into the serial
2663 * structure.
2664 ****************************************************************************/
2665 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2666 {
2667 int response;
2668
2669 dbg("getting manufacturer descriptor");
2670
2671 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2672 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2673 (__u8 *)(&edge_serial->manuf_descriptor));
2674
2675 if (response < 1) {
2676 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2677 } else {
2678 char string[30];
2679 dbg("**Manufacturer Descriptor");
2680 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize);
2681 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize);
2682 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev);
2683 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev);
2684 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts);
2685 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2686 unicode_to_ascii(string, sizeof(string),
2687 edge_serial->manuf_descriptor.SerialNumber,
2688 edge_serial->manuf_descriptor.SerNumLength/2);
2689 dbg(" SerialNumber: %s", string);
2690 unicode_to_ascii(string, sizeof(string),
2691 edge_serial->manuf_descriptor.AssemblyNumber,
2692 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2693 dbg(" AssemblyNumber: %s", string);
2694 unicode_to_ascii(string, sizeof(string),
2695 edge_serial->manuf_descriptor.OemAssyNumber,
2696 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2697 dbg(" OemAssyNumber: %s", string);
2698 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType);
2699 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid);
2700 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig);
2701 }
2702 }
2703
2704
2705 /****************************************************************************
2706 * get_boot_desc
2707 * reads in the bootloader descriptor and stores it into the serial
2708 * structure.
2709 ****************************************************************************/
2710 static void get_boot_desc (struct edgeport_serial *edge_serial)
2711 {
2712 int response;
2713
2714 dbg("getting boot descriptor");
2715
2716 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2717 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2718 (__u8 *)(&edge_serial->boot_descriptor));
2719
2720 if (response < 1) {
2721 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2722 } else {
2723 dbg("**Boot Descriptor:");
2724 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2725 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion);
2726 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion);
2727 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2728 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2729 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0);
2730 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1);
2731 }
2732 }
2733
2734
2735 /****************************************************************************
2736 * load_application_firmware
2737 * This is called to load the application firmware to the device
2738 ****************************************************************************/
2739 static void load_application_firmware (struct edgeport_serial *edge_serial)
2740 {
2741 const struct ihex_binrec *rec;
2742 const struct firmware *fw;
2743 const char *fw_name;
2744 const char *fw_info;
2745 int response;
2746 __u32 Operaddr;
2747 __u16 build;
2748
2749 switch (edge_serial->product_info.iDownloadFile) {
2750 case EDGE_DOWNLOAD_FILE_I930:
2751 fw_info = "downloading firmware version (930)";
2752 fw_name = "edgeport/down.fw";
2753 break;
2754
2755 case EDGE_DOWNLOAD_FILE_80251:
2756 fw_info = "downloading firmware version (80251)";
2757 fw_name = "edgeport/down2.fw";
2758 break;
2759
2760 case EDGE_DOWNLOAD_FILE_NONE:
2761 dbg ("No download file specified, skipping download\n");
2762 return;
2763
2764 default:
2765 return;
2766 }
2767
2768 response = request_ihex_firmware(&fw, fw_name,
2769 &edge_serial->serial->dev->dev);
2770 if (response) {
2771 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2772 fw_name, response);
2773 return;
2774 }
2775
2776 rec = (const struct ihex_binrec *)fw->data;
2777 build = (rec->data[2] << 8) | rec->data[3];
2778
2779 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2780
2781 edge_serial->product_info.FirmwareMajorVersion = fw->data[0];
2782 edge_serial->product_info.FirmwareMinorVersion = fw->data[1];
2783 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2784
2785 for (rec = ihex_next_binrec(rec); rec;
2786 rec = ihex_next_binrec(rec)) {
2787 Operaddr = be32_to_cpu(rec->addr);
2788 response = sram_write(edge_serial->serial,
2789 Operaddr >> 16,
2790 Operaddr & 0xFFFF,
2791 be16_to_cpu(rec->len),
2792 &rec->data[0]);
2793 if (response < 0) {
2794 dev_err(&edge_serial->serial->dev->dev,
2795 "sram_write failed (%x, %x, %d)\n",
2796 Operaddr >> 16, Operaddr & 0xFFFF,
2797 be16_to_cpu(rec->len));
2798 break;
2799 }
2800 }
2801
2802 dbg("sending exec_dl_code");
2803 response = usb_control_msg (edge_serial->serial->dev,
2804 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2805 USB_REQUEST_ION_EXEC_DL_CODE,
2806 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2807
2808 release_firmware(fw);
2809 return;
2810 }
2811
2812
2813 /****************************************************************************
2814 * edge_startup
2815 ****************************************************************************/
2816 static int edge_startup (struct usb_serial *serial)
2817 {
2818 struct edgeport_serial *edge_serial;
2819 struct edgeport_port *edge_port;
2820 struct usb_device *dev;
2821 int i, j;
2822 int response;
2823 bool interrupt_in_found;
2824 bool bulk_in_found;
2825 bool bulk_out_found;
2826 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2827 EDGE_COMPATIBILITY_MASK1,
2828 EDGE_COMPATIBILITY_MASK2 };
2829
2830 dev = serial->dev;
2831
2832 /* create our private serial structure */
2833 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2834 if (edge_serial == NULL) {
2835 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2836 return -ENOMEM;
2837 }
2838 spin_lock_init(&edge_serial->es_lock);
2839 edge_serial->serial = serial;
2840 usb_set_serial_data(serial, edge_serial);
2841
2842 /* get the name for the device from the device */
2843 i = get_string(dev, dev->descriptor.iManufacturer,
2844 &edge_serial->name[0], MAX_NAME_LEN+1);
2845 edge_serial->name[i++] = ' ';
2846 get_string(dev, dev->descriptor.iProduct,
2847 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2848
2849 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2850
2851 /* Read the epic descriptor */
2852 if (get_epic_descriptor(edge_serial) <= 0) {
2853 /* memcpy descriptor to Supports structures */
2854 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2855 sizeof(struct edge_compatibility_bits));
2856
2857 /* get the manufacturing descriptor for this device */
2858 get_manufacturing_desc (edge_serial);
2859
2860 /* get the boot descriptor */
2861 get_boot_desc (edge_serial);
2862
2863 get_product_info(edge_serial);
2864 }
2865
2866 /* set the number of ports from the manufacturing description */
2867 /* serial->num_ports = serial->product_info.NumPorts; */
2868 if ((!edge_serial->is_epic) &&
2869 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2870 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2871 "vs. core thinking we have %d ports, email "
2872 "greg@kroah.com this information.\n",
2873 edge_serial->product_info.NumPorts,
2874 serial->num_ports);
2875 }
2876
2877 dbg("%s - time 1 %ld", __func__, jiffies);
2878
2879 /* If not an EPiC device */
2880 if (!edge_serial->is_epic) {
2881 /* now load the application firmware into this device */
2882 load_application_firmware (edge_serial);
2883
2884 dbg("%s - time 2 %ld", __func__, jiffies);
2885
2886 /* Check current Edgeport EEPROM and update if necessary */
2887 update_edgeport_E2PROM (edge_serial);
2888
2889 dbg("%s - time 3 %ld", __func__, jiffies);
2890
2891 /* set the configuration to use #1 */
2892 // dbg("set_configuration 1");
2893 // usb_set_configuration (dev, 1);
2894 }
2895 dbg(" FirmwareMajorVersion %d.%d.%d",
2896 edge_serial->product_info.FirmwareMajorVersion,
2897 edge_serial->product_info.FirmwareMinorVersion,
2898 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2899
2900 /* we set up the pointers to the endpoints in the edge_open function,
2901 * as the structures aren't created yet. */
2902
2903 /* set up our port private structures */
2904 for (i = 0; i < serial->num_ports; ++i) {
2905 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
2906 if (edge_port == NULL) {
2907 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2908 for (j = 0; j < i; ++j) {
2909 kfree (usb_get_serial_port_data(serial->port[j]));
2910 usb_set_serial_port_data(serial->port[j], NULL);
2911 }
2912 usb_set_serial_data(serial, NULL);
2913 kfree(edge_serial);
2914 return -ENOMEM;
2915 }
2916 memset (edge_port, 0, sizeof(struct edgeport_port));
2917 spin_lock_init(&edge_port->ep_lock);
2918 edge_port->port = serial->port[i];
2919 usb_set_serial_port_data(serial->port[i], edge_port);
2920 }
2921
2922 response = 0;
2923
2924 if (edge_serial->is_epic) {
2925 /* EPIC thing, set up our interrupt polling now and our read urb, so
2926 * that the device knows it really is connected. */
2927 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2928 for (i = 0; i < serial->interface->altsetting[0].desc.bNumEndpoints; ++i) {
2929 struct usb_endpoint_descriptor *endpoint;
2930 int buffer_size;
2931
2932 endpoint = &serial->interface->altsetting[0].endpoint[i].desc;
2933 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2934 if (!interrupt_in_found &&
2935 (usb_endpoint_is_int_in(endpoint))) {
2936 /* we found a interrupt in endpoint */
2937 dbg("found interrupt in");
2938
2939 /* not set up yet, so do it now */
2940 edge_serial->interrupt_read_urb = usb_alloc_urb(0, GFP_KERNEL);
2941 if (!edge_serial->interrupt_read_urb) {
2942 err("out of memory");
2943 return -ENOMEM;
2944 }
2945 edge_serial->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2946 if (!edge_serial->interrupt_in_buffer) {
2947 err("out of memory");
2948 usb_free_urb(edge_serial->interrupt_read_urb);
2949 return -ENOMEM;
2950 }
2951 edge_serial->interrupt_in_endpoint = endpoint->bEndpointAddress;
2952
2953 /* set up our interrupt urb */
2954 usb_fill_int_urb(edge_serial->interrupt_read_urb,
2955 dev,
2956 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
2957 edge_serial->interrupt_in_buffer,
2958 buffer_size,
2959 edge_interrupt_callback,
2960 edge_serial,
2961 endpoint->bInterval);
2962
2963 interrupt_in_found = true;
2964 }
2965
2966 if (!bulk_in_found &&
2967 (usb_endpoint_is_bulk_in(endpoint))) {
2968 /* we found a bulk in endpoint */
2969 dbg("found bulk in");
2970
2971 /* not set up yet, so do it now */
2972 edge_serial->read_urb = usb_alloc_urb(0, GFP_KERNEL);
2973 if (!edge_serial->read_urb) {
2974 err("out of memory");
2975 return -ENOMEM;
2976 }
2977 edge_serial->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2978 if (!edge_serial->bulk_in_buffer) {
2979 err ("out of memory");
2980 usb_free_urb(edge_serial->read_urb);
2981 return -ENOMEM;
2982 }
2983 edge_serial->bulk_in_endpoint = endpoint->bEndpointAddress;
2984
2985 /* set up our bulk in urb */
2986 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2987 usb_rcvbulkpipe(dev, endpoint->bEndpointAddress),
2988 edge_serial->bulk_in_buffer,
2989 le16_to_cpu(endpoint->wMaxPacketSize),
2990 edge_bulk_in_callback,
2991 edge_serial);
2992 bulk_in_found = true;
2993 }
2994
2995 if (!bulk_out_found &&
2996 (usb_endpoint_is_bulk_out(endpoint))) {
2997 /* we found a bulk out endpoint */
2998 dbg("found bulk out");
2999 edge_serial->bulk_out_endpoint = endpoint->bEndpointAddress;
3000 bulk_out_found = true;
3001 }
3002 }
3003
3004 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3005 err ("Error - the proper endpoints were not found!");
3006 return -ENODEV;
3007 }
3008
3009 /* start interrupt read for this edgeport this interrupt will
3010 * continue as long as the edgeport is connected */
3011 response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL);
3012 if (response)
3013 err("%s - Error %d submitting control urb", __func__, response);
3014 }
3015 return response;
3016 }
3017
3018
3019 /****************************************************************************
3020 * edge_shutdown
3021 * This function is called whenever the device is removed from the usb bus.
3022 ****************************************************************************/
3023 static void edge_shutdown (struct usb_serial *serial)
3024 {
3025 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3026 int i;
3027
3028 dbg("%s", __func__);
3029
3030 /* stop reads and writes on all ports */
3031 for (i=0; i < serial->num_ports; ++i) {
3032 kfree (usb_get_serial_port_data(serial->port[i]));
3033 usb_set_serial_port_data(serial->port[i], NULL);
3034 }
3035 /* free up our endpoint stuff */
3036 if (edge_serial->is_epic) {
3037 usb_kill_urb(edge_serial->interrupt_read_urb);
3038 usb_free_urb(edge_serial->interrupt_read_urb);
3039 kfree(edge_serial->interrupt_in_buffer);
3040
3041 usb_kill_urb(edge_serial->read_urb);
3042 usb_free_urb(edge_serial->read_urb);
3043 kfree(edge_serial->bulk_in_buffer);
3044 }
3045
3046 kfree(edge_serial);
3047 usb_set_serial_data(serial, NULL);
3048 }
3049
3050
3051 /****************************************************************************
3052 * edgeport_init
3053 * This is called by the module subsystem, or on startup to initialize us
3054 ****************************************************************************/
3055 static int __init edgeport_init(void)
3056 {
3057 int retval;
3058
3059 retval = usb_serial_register(&edgeport_2port_device);
3060 if (retval)
3061 goto failed_2port_device_register;
3062 retval = usb_serial_register(&edgeport_4port_device);
3063 if (retval)
3064 goto failed_4port_device_register;
3065 retval = usb_serial_register(&edgeport_8port_device);
3066 if (retval)
3067 goto failed_8port_device_register;
3068 retval = usb_serial_register(&epic_device);
3069 if (retval)
3070 goto failed_epic_device_register;
3071 retval = usb_register(&io_driver);
3072 if (retval)
3073 goto failed_usb_register;
3074 atomic_set(&CmdUrbs, 0);
3075 info(DRIVER_DESC " " DRIVER_VERSION);
3076 return 0;
3077
3078 failed_usb_register:
3079 usb_serial_deregister(&epic_device);
3080 failed_epic_device_register:
3081 usb_serial_deregister(&edgeport_8port_device);
3082 failed_8port_device_register:
3083 usb_serial_deregister(&edgeport_4port_device);
3084 failed_4port_device_register:
3085 usb_serial_deregister(&edgeport_2port_device);
3086 failed_2port_device_register:
3087 return retval;
3088 }
3089
3090
3091 /****************************************************************************
3092 * edgeport_exit
3093 * Called when the driver is about to be unloaded.
3094 ****************************************************************************/
3095 static void __exit edgeport_exit (void)
3096 {
3097 usb_deregister (&io_driver);
3098 usb_serial_deregister (&edgeport_2port_device);
3099 usb_serial_deregister (&edgeport_4port_device);
3100 usb_serial_deregister (&edgeport_8port_device);
3101 usb_serial_deregister (&epic_device);
3102 }
3103
3104 module_init(edgeport_init);
3105 module_exit(edgeport_exit);
3106
3107 /* Module information */
3108 MODULE_AUTHOR( DRIVER_AUTHOR );
3109 MODULE_DESCRIPTION( DRIVER_DESC );
3110 MODULE_LICENSE("GPL");
3111 MODULE_FIRMWARE("edgeport/boot.fw");
3112 MODULE_FIRMWARE("edgeport/boot2.fw");
3113 MODULE_FIRMWARE("edgeport/down.fw");
3114 MODULE_FIRMWARE("edgeport/down2.fw");
3115
3116 module_param(debug, bool, S_IRUGO | S_IWUSR);
3117 MODULE_PARM_DESC(debug, "Debug enabled or not");
3118
3119 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3120 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
Linux kernel - Deliverables
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