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Driver Core: devtmpfs - kernel-maintained tmpfs-based /dev
[linux/fpc-iii.git] / drivers / usb / serial / io_edgeport.c
blob0191693625d6541dbe5125df9b488be237828d77
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 <linux/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
171 static const struct divisor_table_entry divisor_table[] = {
172 { 50, 4608},
173 { 75, 3072},
174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
176 { 150, 1536},
177 { 300, 768},
178 { 600, 384},
179 { 1200, 192},
180 { 1800, 128},
181 { 2400, 96},
182 { 4800, 48},
183 { 7200, 32},
184 { 9600, 24},
185 { 14400, 16},
186 { 19200, 12},
187 { 38400, 6},
188 { 57600, 4},
189 { 115200, 2},
190 { 230400, 1},
191 };
192
193 /* local variables */
194 static int debug;
195
196 static atomic_t CmdUrbs; /* Number of outstanding Command Write Urbs */
197
198
199 /* local function prototypes */
200
201 /* function prototypes for all URB callbacks */
202 static void edge_interrupt_callback(struct urb *urb);
203 static void edge_bulk_in_callback(struct urb *urb);
204 static void edge_bulk_out_data_callback(struct urb *urb);
205 static void edge_bulk_out_cmd_callback(struct urb *urb);
206
207 /* function prototypes for the usbserial callbacks */
208 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port,
209 struct file *filp);
210 static void edge_close(struct usb_serial_port *port);
211 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
212 const unsigned char *buf, int count);
213 static int edge_write_room(struct tty_struct *tty);
214 static int edge_chars_in_buffer(struct tty_struct *tty);
215 static void edge_throttle(struct tty_struct *tty);
216 static void edge_unthrottle(struct tty_struct *tty);
217 static void edge_set_termios(struct tty_struct *tty,
218 struct usb_serial_port *port,
219 struct ktermios *old_termios);
220 static int edge_ioctl(struct tty_struct *tty, struct file *file,
221 unsigned int cmd, unsigned long arg);
222 static void edge_break(struct tty_struct *tty, int break_state);
223 static int edge_tiocmget(struct tty_struct *tty, struct file *file);
224 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
225 unsigned int set, unsigned int clear);
226 static int edge_startup(struct usb_serial *serial);
227 static void edge_disconnect(struct usb_serial *serial);
228 static void edge_release(struct usb_serial *serial);
229
230 #include "io_tables.h" /* all of the devices that this driver supports */
231
232 /* function prototypes for all of our local functions */
233
234 static void process_rcvd_data(struct edgeport_serial *edge_serial,
235 unsigned char *buffer, __u16 bufferLength);
236 static void process_rcvd_status(struct edgeport_serial *edge_serial,
237 __u8 byte2, __u8 byte3);
238 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
239 unsigned char *data, int length);
240 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
241 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
242 __u8 lsr, __u8 data);
243 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
244 __u8 param);
245 static int calc_baud_rate_divisor(int baud_rate, int *divisor);
246 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
247 int baudRate);
248 static void change_port_settings(struct tty_struct *tty,
249 struct edgeport_port *edge_port,
250 struct ktermios *old_termios);
251 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
252 __u8 regNum, __u8 regValue);
253 static int write_cmd_usb(struct edgeport_port *edge_port,
254 unsigned char *buffer, int writeLength);
255 static void send_more_port_data(struct edgeport_serial *edge_serial,
256 struct edgeport_port *edge_port);
257
258 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
259 __u16 length, const __u8 *data);
260 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
261 __u16 length, __u8 *data);
262 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
263 __u16 length, const __u8 *data);
264 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
265 static void get_boot_desc(struct edgeport_serial *edge_serial);
266 static void load_application_firmware(struct edgeport_serial *edge_serial);
267
268 static void unicode_to_ascii(char *string, int buflen,
269 __le16 *unicode, int unicode_size);
270
271
272 /* ************************************************************************ */
273 /* ************************************************************************ */
274 /* ************************************************************************ */
275 /* ************************************************************************ */
276
277 /************************************************************************
278 * *
279 * update_edgeport_E2PROM() Compare current versions of *
280 * Boot ROM and Manufacture *
281 * Descriptors with versions *
282 * embedded in this driver *
283 * *
284 ************************************************************************/
285 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
286 {
287 __u32 BootCurVer;
288 __u32 BootNewVer;
289 __u8 BootMajorVersion;
290 __u8 BootMinorVersion;
291 __u16 BootBuildNumber;
292 __u32 Bootaddr;
293 const struct ihex_binrec *rec;
294 const struct firmware *fw;
295 const char *fw_name;
296 int response;
297
298 switch (edge_serial->product_info.iDownloadFile) {
299 case EDGE_DOWNLOAD_FILE_I930:
300 fw_name = "edgeport/boot.fw";
301 break;
302 case EDGE_DOWNLOAD_FILE_80251:
303 fw_name = "edgeport/boot2.fw";
304 break;
305 default:
306 return;
307 }
308
309 response = request_ihex_firmware(&fw, fw_name,
310 &edge_serial->serial->dev->dev);
311 if (response) {
312 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
313 fw_name, response);
314 return;
315 }
316
317 rec = (const struct ihex_binrec *)fw->data;
318 BootMajorVersion = rec->data[0];
319 BootMinorVersion = rec->data[1];
320 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
321
322 /* Check Boot Image Version */
323 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
324 (edge_serial->boot_descriptor.MinorVersion << 16) +
325 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
326
327 BootNewVer = (BootMajorVersion << 24) +
328 (BootMinorVersion << 16) +
329 BootBuildNumber;
330
331 dbg("Current Boot Image version %d.%d.%d",
332 edge_serial->boot_descriptor.MajorVersion,
333 edge_serial->boot_descriptor.MinorVersion,
334 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
335
336
337 if (BootNewVer > BootCurVer) {
338 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
339 edge_serial->boot_descriptor.MajorVersion,
340 edge_serial->boot_descriptor.MinorVersion,
341 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
342 BootMajorVersion, BootMinorVersion, BootBuildNumber);
343
344 dbg("Downloading new Boot Image");
345
346 for (rec = ihex_next_binrec(rec); rec;
347 rec = ihex_next_binrec(rec)) {
348 Bootaddr = be32_to_cpu(rec->addr);
349 response = rom_write(edge_serial->serial,
350 Bootaddr >> 16,
351 Bootaddr & 0xFFFF,
352 be16_to_cpu(rec->len),
353 &rec->data[0]);
354 if (response < 0) {
355 dev_err(&edge_serial->serial->dev->dev,
356 "rom_write failed (%x, %x, %d)\n",
357 Bootaddr >> 16, Bootaddr & 0xFFFF,
358 be16_to_cpu(rec->len));
359 break;
360 }
361 }
362 } else {
363 dbg("Boot Image -- already up to date");
364 }
365 release_firmware(fw);
366 }
367
368
369 /************************************************************************
370 * *
371 * Get string descriptor from device *
372 * *
373 ************************************************************************/
374 static int get_string(struct usb_device *dev, int Id, char *string, int buflen)
375 {
376 struct usb_string_descriptor StringDesc;
377 struct usb_string_descriptor *pStringDesc;
378
379 dbg("%s - USB String ID = %d", __func__, Id);
380
381 if (!usb_get_descriptor(dev, USB_DT_STRING, Id,
382 &StringDesc, sizeof(StringDesc)))
383 return 0;
384
385 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
386 if (!pStringDesc)
387 return 0;
388
389 if (!usb_get_descriptor(dev, USB_DT_STRING, Id,
390 pStringDesc, StringDesc.bLength)) {
391 kfree(pStringDesc);
392 return 0;
393 }
394
395 unicode_to_ascii(string, buflen,
396 pStringDesc->wData, pStringDesc->bLength/2);
397
398 kfree(pStringDesc);
399 dbg("%s - USB String %s", __func__, string);
400 return strlen(string);
401 }
402
403
404 #if 0
405 /************************************************************************
406 *
407 * Get string descriptor from device
408 *
409 ************************************************************************/
410 static int get_string_desc(struct usb_device *dev, int Id,
411 struct usb_string_descriptor **pRetDesc)
412 {
413 struct usb_string_descriptor StringDesc;
414 struct usb_string_descriptor *pStringDesc;
415
416 dbg("%s - USB String ID = %d", __func__, Id);
417
418 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
419 sizeof(StringDesc)))
420 return 0;
421
422 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
423 if (!pStringDesc)
424 return -1;
425
426 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
427 StringDesc.bLength)) {
428 kfree(pStringDesc);
429 return -1;
430 }
431
432 *pRetDesc = pStringDesc;
433 return 0;
434 }
435 #endif
436
437 static void dump_product_info(struct edgeport_product_info *product_info)
438 {
439 /* Dump Product Info structure */
440 dbg("**Product Information:");
441 dbg(" ProductId %x", product_info->ProductId);
442 dbg(" NumPorts %d", product_info->NumPorts);
443 dbg(" ProdInfoVer %d", product_info->ProdInfoVer);
444 dbg(" IsServer %d", product_info->IsServer);
445 dbg(" IsRS232 %d", product_info->IsRS232);
446 dbg(" IsRS422 %d", product_info->IsRS422);
447 dbg(" IsRS485 %d", product_info->IsRS485);
448 dbg(" RomSize %d", product_info->RomSize);
449 dbg(" RamSize %d", product_info->RamSize);
450 dbg(" CpuRev %x", product_info->CpuRev);
451 dbg(" BoardRev %x", product_info->BoardRev);
452 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
453 product_info->BootMinorVersion,
454 le16_to_cpu(product_info->BootBuildNumber));
455 dbg(" FirmwareMajorVersion %d.%d.%d",
456 product_info->FirmwareMajorVersion,
457 product_info->FirmwareMinorVersion,
458 le16_to_cpu(product_info->FirmwareBuildNumber));
459 dbg(" ManufactureDescDate %d/%d/%d",
460 product_info->ManufactureDescDate[0],
461 product_info->ManufactureDescDate[1],
462 product_info->ManufactureDescDate[2]+1900);
463 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
464 dbg(" EpicVer %d", product_info->EpicVer);
465 }
466
467 static void get_product_info(struct edgeport_serial *edge_serial)
468 {
469 struct edgeport_product_info *product_info = &edge_serial->product_info;
470
471 memset(product_info, 0, sizeof(struct edgeport_product_info));
472
473 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
474 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
475 product_info->ProdInfoVer = 0;
476
477 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
478 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
479 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
480 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
481
482 product_info->BootMajorVersion =
483 edge_serial->boot_descriptor.MajorVersion;
484 product_info->BootMinorVersion =
485 edge_serial->boot_descriptor.MinorVersion;
486 product_info->BootBuildNumber =
487 edge_serial->boot_descriptor.BuildNumber;
488
489 memcpy(product_info->ManufactureDescDate,
490 edge_serial->manuf_descriptor.DescDate,
491 sizeof(edge_serial->manuf_descriptor.DescDate));
492
493 /* check if this is 2nd generation hardware */
494 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
495 & ION_DEVICE_ID_80251_NETCHIP)
496 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
497 else
498 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
499
500 /* Determine Product type and set appropriate flags */
501 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
502 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
503 case ION_DEVICE_ID_EDGEPORT_4T:
504 case ION_DEVICE_ID_EDGEPORT_4:
505 case ION_DEVICE_ID_EDGEPORT_2:
506 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
507 case ION_DEVICE_ID_EDGEPORT_8:
508 case ION_DEVICE_ID_EDGEPORT_421:
509 case ION_DEVICE_ID_EDGEPORT_21:
510 case ION_DEVICE_ID_EDGEPORT_2_DIN:
511 case ION_DEVICE_ID_EDGEPORT_4_DIN:
512 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
513 product_info->IsRS232 = 1;
514 break;
515
516 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
517 product_info->IsRS422 = 1;
518 product_info->IsRS485 = 1;
519 break;
520
521 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
522 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
523 product_info->IsRS422 = 1;
524 break;
525 }
526
527 dump_product_info(product_info);
528 }
529
530 static int get_epic_descriptor(struct edgeport_serial *ep)
531 {
532 int result;
533 struct usb_serial *serial = ep->serial;
534 struct edgeport_product_info *product_info = &ep->product_info;
535 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
536 struct edge_compatibility_bits *bits;
537
538 ep->is_epic = 0;
539 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
540 USB_REQUEST_ION_GET_EPIC_DESC,
541 0xC0, 0x00, 0x00,
542 &ep->epic_descriptor,
543 sizeof(struct edge_compatibility_descriptor),
544 300);
545
546 dbg("%s result = %d", __func__, result);
547
548 if (result > 0) {
549 ep->is_epic = 1;
550 memset(product_info, 0, sizeof(struct edgeport_product_info));
551
552 product_info->NumPorts = epic->NumPorts;
553 product_info->ProdInfoVer = 0;
554 product_info->FirmwareMajorVersion = epic->MajorVersion;
555 product_info->FirmwareMinorVersion = epic->MinorVersion;
556 product_info->FirmwareBuildNumber = epic->BuildNumber;
557 product_info->iDownloadFile = epic->iDownloadFile;
558 product_info->EpicVer = epic->EpicVer;
559 product_info->Epic = epic->Supports;
560 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
561 dump_product_info(product_info);
562
563 bits = &ep->epic_descriptor.Supports;
564 dbg("**EPIC descriptor:");
565 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE");
566 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE");
567 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE");
568 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE");
569 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
570 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
571 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE");
572 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE");
573 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
574 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE");
575 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE");
576 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
577 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE");
578 }
579
580 return result;
581 }
582
583
584 /************************************************************************/
585 /************************************************************************/
586 /* U S B C A L L B A C K F U N C T I O N S */
587 /* U S B C A L L B A C K F U N C T I O N S */
588 /************************************************************************/
589 /************************************************************************/
590
591 /*****************************************************************************
592 * edge_interrupt_callback
593 * this is the callback function for when we have received data on the
594 * interrupt endpoint.
595 *****************************************************************************/
596 static void edge_interrupt_callback(struct urb *urb)
597 {
598 struct edgeport_serial *edge_serial = urb->context;
599 struct edgeport_port *edge_port;
600 struct usb_serial_port *port;
601 struct tty_struct *tty;
602 unsigned char *data = urb->transfer_buffer;
603 int length = urb->actual_length;
604 int bytes_avail;
605 int position;
606 int txCredits;
607 int portNumber;
608 int result;
609 int status = urb->status;
610
611 dbg("%s", __func__);
612
613 switch (status) {
614 case 0:
615 /* success */
616 break;
617 case -ECONNRESET:
618 case -ENOENT:
619 case -ESHUTDOWN:
620 /* this urb is terminated, clean up */
621 dbg("%s - urb shutting down with status: %d",
622 __func__, status);
623 return;
624 default:
625 dbg("%s - nonzero urb status received: %d", __func__, status);
626 goto exit;
627 }
628
629 /* process this interrupt-read even if there are no ports open */
630 if (length) {
631 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
632 __func__, length, data);
633
634 if (length > 1) {
635 bytes_avail = data[0] | (data[1] << 8);
636 if (bytes_avail) {
637 spin_lock(&edge_serial->es_lock);
638 edge_serial->rxBytesAvail += bytes_avail;
639 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
640
641 if (edge_serial->rxBytesAvail > 0 &&
642 !edge_serial->read_in_progress) {
643 dbg("%s - posting a read", __func__);
644 edge_serial->read_in_progress = true;
645
646 /* we have pending bytes on the
647 bulk in pipe, send a request */
648 edge_serial->read_urb->dev = edge_serial->serial->dev;
649 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
650 if (result) {
651 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
652 edge_serial->read_in_progress = false;
653 }
654 }
655 spin_unlock(&edge_serial->es_lock);
656 }
657 }
658 /* grab the txcredits for the ports if available */
659 position = 2;
660 portNumber = 0;
661 while ((position < length) &&
662 (portNumber < edge_serial->serial->num_ports)) {
663 txCredits = data[position] | (data[position+1] << 8);
664 if (txCredits) {
665 port = edge_serial->serial->port[portNumber];
666 edge_port = usb_get_serial_port_data(port);
667 if (edge_port->open) {
668 spin_lock(&edge_port->ep_lock);
669 edge_port->txCredits += txCredits;
670 spin_unlock(&edge_port->ep_lock);
671 dbg("%s - txcredits for port%d = %d",
672 __func__, portNumber,
673 edge_port->txCredits);
674
675 /* tell the tty driver that something
676 has changed */
677 tty = tty_port_tty_get(
678 &edge_port->port->port);
679 if (tty) {
680 tty_wakeup(tty);
681 tty_kref_put(tty);
682 }
683 /* Since we have more credit, check
684 if more data can be sent */
685 send_more_port_data(edge_serial,
686 edge_port);
687 }
688 }
689 position += 2;
690 ++portNumber;
691 }
692 }
693
694 exit:
695 result = usb_submit_urb(urb, GFP_ATOMIC);
696 if (result)
697 dev_err(&urb->dev->dev,
698 "%s - Error %d submitting control urb\n",
699 __func__, result);
700 }
701
702
703 /*****************************************************************************
704 * edge_bulk_in_callback
705 * this is the callback function for when we have received data on the
706 * bulk in endpoint.
707 *****************************************************************************/
708 static void edge_bulk_in_callback(struct urb *urb)
709 {
710 struct edgeport_serial *edge_serial = urb->context;
711 unsigned char *data = urb->transfer_buffer;
712 int retval;
713 __u16 raw_data_length;
714 int status = urb->status;
715
716 dbg("%s", __func__);
717
718 if (status) {
719 dbg("%s - nonzero read bulk status received: %d",
720 __func__, status);
721 edge_serial->read_in_progress = false;
722 return;
723 }
724
725 if (urb->actual_length == 0) {
726 dbg("%s - read bulk callback with no data", __func__);
727 edge_serial->read_in_progress = false;
728 return;
729 }
730
731 raw_data_length = urb->actual_length;
732
733 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
734 __func__, raw_data_length, data);
735
736 spin_lock(&edge_serial->es_lock);
737
738 /* decrement our rxBytes available by the number that we just got */
739 edge_serial->rxBytesAvail -= raw_data_length;
740
741 dbg("%s - Received = %d, rxBytesAvail %d", __func__,
742 raw_data_length, edge_serial->rxBytesAvail);
743
744 process_rcvd_data(edge_serial, data, urb->actual_length);
745
746 /* check to see if there's any more data for us to read */
747 if (edge_serial->rxBytesAvail > 0) {
748 dbg("%s - posting a read", __func__);
749 edge_serial->read_urb->dev = edge_serial->serial->dev;
750 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
751 if (retval) {
752 dev_err(&urb->dev->dev,
753 "%s - usb_submit_urb(read bulk) failed, "
754 "retval = %d\n", __func__, retval);
755 edge_serial->read_in_progress = false;
756 }
757 } else {
758 edge_serial->read_in_progress = false;
759 }
760
761 spin_unlock(&edge_serial->es_lock);
762 }
763
764
765 /*****************************************************************************
766 * edge_bulk_out_data_callback
767 * this is the callback function for when we have finished sending
768 * serial data on the bulk out endpoint.
769 *****************************************************************************/
770 static void edge_bulk_out_data_callback(struct urb *urb)
771 {
772 struct edgeport_port *edge_port = urb->context;
773 struct tty_struct *tty;
774 int status = urb->status;
775
776 dbg("%s", __func__);
777
778 if (status) {
779 dbg("%s - nonzero write bulk status received: %d",
780 __func__, status);
781 }
782
783 tty = tty_port_tty_get(&edge_port->port->port);
784
785 if (tty && edge_port->open) {
786 /* let the tty driver wakeup if it has a special
787 write_wakeup function */
788 tty_wakeup(tty);
789 }
790 tty_kref_put(tty);
791
792 /* Release the Write URB */
793 edge_port->write_in_progress = false;
794
795 /* Check if more data needs to be sent */
796 send_more_port_data((struct edgeport_serial *)
797 (usb_get_serial_data(edge_port->port->serial)), edge_port);
798 }
799
800
801 /*****************************************************************************
802 * BulkOutCmdCallback
803 * this is the callback function for when we have finished sending a
804 * command on the bulk out endpoint.
805 *****************************************************************************/
806 static void edge_bulk_out_cmd_callback(struct urb *urb)
807 {
808 struct edgeport_port *edge_port = urb->context;
809 struct tty_struct *tty;
810 int status = urb->status;
811
812 dbg("%s", __func__);
813
814 atomic_dec(&CmdUrbs);
815 dbg("%s - FREE URB %p (outstanding %d)", __func__,
816 urb, atomic_read(&CmdUrbs));
817
818
819 /* clean up the transfer buffer */
820 kfree(urb->transfer_buffer);
821
822 /* Free the command urb */
823 usb_free_urb(urb);
824
825 if (status) {
826 dbg("%s - nonzero write bulk status received: %d",
827 __func__, status);
828 return;
829 }
830
831 /* Get pointer to tty */
832 tty = tty_port_tty_get(&edge_port->port->port);
833
834 /* tell the tty driver that something has changed */
835 if (tty && edge_port->open)
836 tty_wakeup(tty);
837 tty_kref_put(tty);
838
839 /* we have completed the command */
840 edge_port->commandPending = false;
841 wake_up(&edge_port->wait_command);
842 }
843
844
845 /*****************************************************************************
846 * Driver tty interface functions
847 *****************************************************************************/
848
849 /*****************************************************************************
850 * SerialOpen
851 * this function is called by the tty driver when a port is opened
852 * If successful, we return 0
853 * Otherwise we return a negative error number.
854 *****************************************************************************/
855 static int edge_open(struct tty_struct *tty,
856 struct usb_serial_port *port, struct file *filp)
857 {
858 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
859 struct usb_serial *serial;
860 struct edgeport_serial *edge_serial;
861 int response;
862
863 dbg("%s - port %d", __func__, port->number);
864
865 if (edge_port == NULL)
866 return -ENODEV;
867
868 /* see if we've set up our endpoint info yet (can't set it up
869 in edge_startup as the structures were not set up at that time.) */
870 serial = port->serial;
871 edge_serial = usb_get_serial_data(serial);
872 if (edge_serial == NULL)
873 return -ENODEV;
874 if (edge_serial->interrupt_in_buffer == NULL) {
875 struct usb_serial_port *port0 = serial->port[0];
876
877 /* not set up yet, so do it now */
878 edge_serial->interrupt_in_buffer =
879 port0->interrupt_in_buffer;
880 edge_serial->interrupt_in_endpoint =
881 port0->interrupt_in_endpointAddress;
882 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
883 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
884 edge_serial->bulk_in_endpoint =
885 port0->bulk_in_endpointAddress;
886 edge_serial->read_urb = port0->read_urb;
887 edge_serial->bulk_out_endpoint =
888 port0->bulk_out_endpointAddress;
889
890 /* set up our interrupt urb */
891 usb_fill_int_urb(edge_serial->interrupt_read_urb,
892 serial->dev,
893 usb_rcvintpipe(serial->dev,
894 port0->interrupt_in_endpointAddress),
895 port0->interrupt_in_buffer,
896 edge_serial->interrupt_read_urb->transfer_buffer_length,
897 edge_interrupt_callback, edge_serial,
898 edge_serial->interrupt_read_urb->interval);
899
900 /* set up our bulk in urb */
901 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
902 usb_rcvbulkpipe(serial->dev,
903 port0->bulk_in_endpointAddress),
904 port0->bulk_in_buffer,
905 edge_serial->read_urb->transfer_buffer_length,
906 edge_bulk_in_callback, edge_serial);
907 edge_serial->read_in_progress = false;
908
909 /* start interrupt read for this edgeport
910 * this interrupt will continue as long
911 * as the edgeport is connected */
912 response = usb_submit_urb(edge_serial->interrupt_read_urb,
913 GFP_KERNEL);
914 if (response) {
915 dev_err(&port->dev,
916 "%s - Error %d submitting control urb\n",
917 __func__, response);
918 }
919 }
920
921 /* initialize our wait queues */
922 init_waitqueue_head(&edge_port->wait_open);
923 init_waitqueue_head(&edge_port->wait_chase);
924 init_waitqueue_head(&edge_port->delta_msr_wait);
925 init_waitqueue_head(&edge_port->wait_command);
926
927 /* initialize our icount structure */
928 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
929
930 /* initialize our port settings */
931 edge_port->txCredits = 0; /* Can't send any data yet */
932 /* Must always set this bit to enable ints! */
933 edge_port->shadowMCR = MCR_MASTER_IE;
934 edge_port->chaseResponsePending = false;
935
936 /* send a open port command */
937 edge_port->openPending = true;
938 edge_port->open = false;
939 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
940
941 if (response < 0) {
942 dev_err(&port->dev, "%s - error sending open port command\n",
943 __func__);
944 edge_port->openPending = false;
945 return -ENODEV;
946 }
947
948 /* now wait for the port to be completely opened */
949 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
950 OPEN_TIMEOUT);
951
952 if (!edge_port->open) {
953 /* open timed out */
954 dbg("%s - open timedout", __func__);
955 edge_port->openPending = false;
956 return -ENODEV;
957 }
958
959 /* create the txfifo */
960 edge_port->txfifo.head = 0;
961 edge_port->txfifo.tail = 0;
962 edge_port->txfifo.count = 0;
963 edge_port->txfifo.size = edge_port->maxTxCredits;
964 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
965
966 if (!edge_port->txfifo.fifo) {
967 dbg("%s - no memory", __func__);
968 edge_close(port);
969 return -ENOMEM;
970 }
971
972 /* Allocate a URB for the write */
973 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
974 edge_port->write_in_progress = false;
975
976 if (!edge_port->write_urb) {
977 dbg("%s - no memory", __func__);
978 edge_close(port);
979 return -ENOMEM;
980 }
981
982 dbg("%s(%d) - Initialize TX fifo to %d bytes",
983 __func__, port->number, edge_port->maxTxCredits);
984
985 dbg("%s exited", __func__);
986
987 return 0;
988 }
989
990
991 /************************************************************************
992 *
993 * block_until_chase_response
994 *
995 * This function will block the close until one of the following:
996 * 1. Response to our Chase comes from Edgeport
997 * 2. A timeout of 10 seconds without activity has expired
998 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
999 *
1000 ************************************************************************/
1001 static void block_until_chase_response(struct edgeport_port *edge_port)
1002 {
1003 DEFINE_WAIT(wait);
1004 __u16 lastCredits;
1005 int timeout = 1*HZ;
1006 int loop = 10;
1007
1008 while (1) {
1009 /* Save Last credits */
1010 lastCredits = edge_port->txCredits;
1011
1012 /* Did we get our Chase response */
1013 if (!edge_port->chaseResponsePending) {
1014 dbg("%s - Got Chase Response", __func__);
1015
1016 /* did we get all of our credit back? */
1017 if (edge_port->txCredits == edge_port->maxTxCredits) {
1018 dbg("%s - Got all credits", __func__);
1019 return;
1020 }
1021 }
1022
1023 /* Block the thread for a while */
1024 prepare_to_wait(&edge_port->wait_chase, &wait,
1025 TASK_UNINTERRUPTIBLE);
1026 schedule_timeout(timeout);
1027 finish_wait(&edge_port->wait_chase, &wait);
1028
1029 if (lastCredits == edge_port->txCredits) {
1030 /* No activity.. count down. */
1031 loop--;
1032 if (loop == 0) {
1033 edge_port->chaseResponsePending = false;
1034 dbg("%s - Chase TIMEOUT", __func__);
1035 return;
1036 }
1037 } else {
1038 /* Reset timeout value back to 10 seconds */
1039 dbg("%s - Last %d, Current %d", __func__,
1040 lastCredits, edge_port->txCredits);
1041 loop = 10;
1042 }
1043 }
1044 }
1045
1046
1047 /************************************************************************
1048 *
1049 * block_until_tx_empty
1050 *
1051 * This function will block the close until one of the following:
1052 * 1. TX count are 0
1053 * 2. The edgeport has stopped
1054 * 3. A timeout of 3 seconds without activity has expired
1055 *
1056 ************************************************************************/
1057 static void block_until_tx_empty(struct edgeport_port *edge_port)
1058 {
1059 DEFINE_WAIT(wait);
1060 struct TxFifo *fifo = &edge_port->txfifo;
1061 __u32 lastCount;
1062 int timeout = HZ/10;
1063 int loop = 30;
1064
1065 while (1) {
1066 /* Save Last count */
1067 lastCount = fifo->count;
1068
1069 /* Is the Edgeport Buffer empty? */
1070 if (lastCount == 0) {
1071 dbg("%s - TX Buffer Empty", __func__);
1072 return;
1073 }
1074
1075 /* Block the thread for a while */
1076 prepare_to_wait(&edge_port->wait_chase, &wait,
1077 TASK_UNINTERRUPTIBLE);
1078 schedule_timeout(timeout);
1079 finish_wait(&edge_port->wait_chase, &wait);
1080
1081 dbg("%s wait", __func__);
1082
1083 if (lastCount == fifo->count) {
1084 /* No activity.. count down. */
1085 loop--;
1086 if (loop == 0) {
1087 dbg("%s - TIMEOUT", __func__);
1088 return;
1089 }
1090 } else {
1091 /* Reset timeout value back to seconds */
1092 loop = 30;
1093 }
1094 }
1095 }
1096
1097
1098 /*****************************************************************************
1099 * edge_close
1100 * this function is called by the tty driver when a port is closed
1101 *****************************************************************************/
1102 static void edge_close(struct usb_serial_port *port)
1103 {
1104 struct edgeport_serial *edge_serial;
1105 struct edgeport_port *edge_port;
1106 int status;
1107
1108 dbg("%s - port %d", __func__, port->number);
1109
1110 edge_serial = usb_get_serial_data(port->serial);
1111 edge_port = usb_get_serial_port_data(port);
1112 if (edge_serial == NULL || edge_port == NULL)
1113 return;
1114
1115 /* block until tx is empty */
1116 block_until_tx_empty(edge_port);
1117
1118 edge_port->closePending = true;
1119
1120 if ((!edge_serial->is_epic) ||
1121 ((edge_serial->is_epic) &&
1122 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1123 /* flush and chase */
1124 edge_port->chaseResponsePending = true;
1125
1126 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1127 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1128 if (status == 0)
1129 /* block until chase finished */
1130 block_until_chase_response(edge_port);
1131 else
1132 edge_port->chaseResponsePending = false;
1133 }
1134
1135 if ((!edge_serial->is_epic) ||
1136 ((edge_serial->is_epic) &&
1137 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1138 /* close the port */
1139 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1140 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1141 }
1142
1143 /* port->close = true; */
1144 edge_port->closePending = false;
1145 edge_port->open = false;
1146 edge_port->openPending = false;
1147
1148 usb_kill_urb(edge_port->write_urb);
1149
1150 if (edge_port->write_urb) {
1151 /* if this urb had a transfer buffer already
1152 (old transfer) free it */
1153 kfree(edge_port->write_urb->transfer_buffer);
1154 usb_free_urb(edge_port->write_urb);
1155 edge_port->write_urb = NULL;
1156 }
1157 kfree(edge_port->txfifo.fifo);
1158 edge_port->txfifo.fifo = NULL;
1159
1160 dbg("%s exited", __func__);
1161 }
1162
1163 /*****************************************************************************
1164 * SerialWrite
1165 * this function is called by the tty driver when data should be written
1166 * to the port.
1167 * If successful, we return the number of bytes written, otherwise we
1168 * return a negative error number.
1169 *****************************************************************************/
1170 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1171 const unsigned char *data, int count)
1172 {
1173 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1174 struct TxFifo *fifo;
1175 int copySize;
1176 int bytesleft;
1177 int firsthalf;
1178 int secondhalf;
1179 unsigned long flags;
1180
1181 dbg("%s - port %d", __func__, port->number);
1182
1183 if (edge_port == NULL)
1184 return -ENODEV;
1185
1186 /* get a pointer to the Tx fifo */
1187 fifo = &edge_port->txfifo;
1188
1189 spin_lock_irqsave(&edge_port->ep_lock, flags);
1190
1191 /* calculate number of bytes to put in fifo */
1192 copySize = min((unsigned int)count,
1193 (edge_port->txCredits - fifo->count));
1194
1195 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes",
1196 __func__, port->number, count,
1197 edge_port->txCredits - fifo->count, copySize);
1198
1199 /* catch writes of 0 bytes which the tty driver likes to give us,
1200 and when txCredits is empty */
1201 if (copySize == 0) {
1202 dbg("%s - copySize = Zero", __func__);
1203 goto finish_write;
1204 }
1205
1206 /* queue the data
1207 * since we can never overflow the buffer we do not have to check for a
1208 * full condition
1209 *
1210 * the copy is done is two parts -- first fill to the end of the buffer
1211 * then copy the reset from the start of the buffer
1212 */
1213 bytesleft = fifo->size - fifo->head;
1214 firsthalf = min(bytesleft, copySize);
1215 dbg("%s - copy %d bytes of %d into fifo ", __func__,
1216 firsthalf, bytesleft);
1217
1218 /* now copy our data */
1219 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1220 usb_serial_debug_data(debug, &port->dev, __func__,
1221 firsthalf, &fifo->fifo[fifo->head]);
1222
1223 /* update the index and size */
1224 fifo->head += firsthalf;
1225 fifo->count += firsthalf;
1226
1227 /* wrap the index */
1228 if (fifo->head == fifo->size)
1229 fifo->head = 0;
1230
1231 secondhalf = copySize-firsthalf;
1232
1233 if (secondhalf) {
1234 dbg("%s - copy rest of data %d", __func__, secondhalf);
1235 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1236 usb_serial_debug_data(debug, &port->dev, __func__,
1237 secondhalf, &fifo->fifo[fifo->head]);
1238 /* update the index and size */
1239 fifo->count += secondhalf;
1240 fifo->head += secondhalf;
1241 /* No need to check for wrap since we can not get to end of
1242 * the fifo in this part
1243 */
1244 }
1245
1246 finish_write:
1247 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1248
1249 send_more_port_data((struct edgeport_serial *)
1250 usb_get_serial_data(port->serial), edge_port);
1251
1252 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1253 copySize, edge_port->txCredits, fifo->count);
1254
1255 return copySize;
1256 }
1257
1258
1259 /************************************************************************
1260 *
1261 * send_more_port_data()
1262 *
1263 * This routine attempts to write additional UART transmit data
1264 * to a port over the USB bulk pipe. It is called (1) when new
1265 * data has been written to a port's TxBuffer from higher layers
1266 * (2) when the peripheral sends us additional TxCredits indicating
1267 * that it can accept more Tx data for a given port; and (3) when
1268 * a bulk write completes successfully and we want to see if we
1269 * can transmit more.
1270 *
1271 ************************************************************************/
1272 static void send_more_port_data(struct edgeport_serial *edge_serial,
1273 struct edgeport_port *edge_port)
1274 {
1275 struct TxFifo *fifo = &edge_port->txfifo;
1276 struct urb *urb;
1277 unsigned char *buffer;
1278 int status;
1279 int count;
1280 int bytesleft;
1281 int firsthalf;
1282 int secondhalf;
1283 unsigned long flags;
1284
1285 dbg("%s(%d)", __func__, edge_port->port->number);
1286
1287 spin_lock_irqsave(&edge_port->ep_lock, flags);
1288
1289 if (edge_port->write_in_progress ||
1290 !edge_port->open ||
1291 (fifo->count == 0)) {
1292 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1293 __func__, edge_port->port->number,
1294 fifo->count, edge_port->write_in_progress);
1295 goto exit_send;
1296 }
1297
1298 /* since the amount of data in the fifo will always fit into the
1299 * edgeport buffer we do not need to check the write length
1300 *
1301 * Do we have enough credits for this port to make it worthwhile
1302 * to bother queueing a write. If it's too small, say a few bytes,
1303 * it's better to wait for more credits so we can do a larger write.
1304 */
1305 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1306 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1307 __func__, edge_port->port->number, fifo->count,
1308 edge_port->txCredits);
1309 goto exit_send;
1310 }
1311
1312 /* lock this write */
1313 edge_port->write_in_progress = true;
1314
1315 /* get a pointer to the write_urb */
1316 urb = edge_port->write_urb;
1317
1318 /* make sure transfer buffer is freed */
1319 kfree(urb->transfer_buffer);
1320 urb->transfer_buffer = NULL;
1321
1322 /* build the data header for the buffer and port that we are about
1323 to send out */
1324 count = fifo->count;
1325 buffer = kmalloc(count+2, GFP_ATOMIC);
1326 if (buffer == NULL) {
1327 dev_err(&edge_port->port->dev,
1328 "%s - no more kernel memory...\n", __func__);
1329 edge_port->write_in_progress = false;
1330 goto exit_send;
1331 }
1332 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1333 - edge_port->port->serial->minor, count);
1334 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1335 - edge_port->port->serial->minor, count);
1336
1337 /* now copy our data */
1338 bytesleft = fifo->size - fifo->tail;
1339 firsthalf = min(bytesleft, count);
1340 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1341 fifo->tail += firsthalf;
1342 fifo->count -= firsthalf;
1343 if (fifo->tail == fifo->size)
1344 fifo->tail = 0;
1345
1346 secondhalf = count-firsthalf;
1347 if (secondhalf) {
1348 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1349 secondhalf);
1350 fifo->tail += secondhalf;
1351 fifo->count -= secondhalf;
1352 }
1353
1354 if (count)
1355 usb_serial_debug_data(debug, &edge_port->port->dev,
1356 __func__, count, &buffer[2]);
1357
1358 /* fill up the urb with all of our data and submit it */
1359 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1360 usb_sndbulkpipe(edge_serial->serial->dev,
1361 edge_serial->bulk_out_endpoint),
1362 buffer, count+2,
1363 edge_bulk_out_data_callback, edge_port);
1364
1365 /* decrement the number of credits we have by the number we just sent */
1366 edge_port->txCredits -= count;
1367 edge_port->icount.tx += count;
1368
1369 urb->dev = edge_serial->serial->dev;
1370 status = usb_submit_urb(urb, GFP_ATOMIC);
1371 if (status) {
1372 /* something went wrong */
1373 dev_err(&edge_port->port->dev,
1374 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1375 __func__, status);
1376 edge_port->write_in_progress = false;
1377
1378 /* revert the credits as something bad happened. */
1379 edge_port->txCredits += count;
1380 edge_port->icount.tx -= count;
1381 }
1382 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1383 __func__, count, edge_port->txCredits, fifo->count);
1384
1385 exit_send:
1386 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1387 }
1388
1389
1390 /*****************************************************************************
1391 * edge_write_room
1392 * this function is called by the tty driver when it wants to know how
1393 * many bytes of data we can accept for a specific port. If successful,
1394 * we return the amount of room that we have for this port (the txCredits)
1395 * otherwise we return a negative error number.
1396 *****************************************************************************/
1397 static int edge_write_room(struct tty_struct *tty)
1398 {
1399 struct usb_serial_port *port = tty->driver_data;
1400 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1401 int room;
1402 unsigned long flags;
1403
1404 dbg("%s", __func__);
1405
1406 if (edge_port == NULL)
1407 return 0;
1408 if (edge_port->closePending)
1409 return 0;
1410
1411 dbg("%s - port %d", __func__, port->number);
1412
1413 if (!edge_port->open) {
1414 dbg("%s - port not opened", __func__);
1415 return 0;
1416 }
1417
1418 /* total of both buffers is still txCredit */
1419 spin_lock_irqsave(&edge_port->ep_lock, flags);
1420 room = edge_port->txCredits - edge_port->txfifo.count;
1421 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1422
1423 dbg("%s - returns %d", __func__, room);
1424 return room;
1425 }
1426
1427
1428 /*****************************************************************************
1429 * edge_chars_in_buffer
1430 * this function is called by the tty driver when it wants to know how
1431 * many bytes of data we currently have outstanding in the port (data that
1432 * has been written, but hasn't made it out the port yet)
1433 * If successful, we return the number of bytes left to be written in the
1434 * system,
1435 * Otherwise we return a negative error number.
1436 *****************************************************************************/
1437 static int edge_chars_in_buffer(struct tty_struct *tty)
1438 {
1439 struct usb_serial_port *port = tty->driver_data;
1440 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1441 int num_chars;
1442 unsigned long flags;
1443
1444 dbg("%s", __func__);
1445
1446 if (edge_port == NULL)
1447 return 0;
1448 if (edge_port->closePending)
1449 return 0;
1450
1451 if (!edge_port->open) {
1452 dbg("%s - port not opened", __func__);
1453 return 0;
1454 }
1455
1456 spin_lock_irqsave(&edge_port->ep_lock, flags);
1457 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1458 edge_port->txfifo.count;
1459 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1460 if (num_chars) {
1461 dbg("%s(port %d) - returns %d", __func__,
1462 port->number, num_chars);
1463 }
1464
1465 return num_chars;
1466 }
1467
1468
1469 /*****************************************************************************
1470 * SerialThrottle
1471 * this function is called by the tty driver when it wants to stop the data
1472 * being read from the port.
1473 *****************************************************************************/
1474 static void edge_throttle(struct tty_struct *tty)
1475 {
1476 struct usb_serial_port *port = tty->driver_data;
1477 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1478 int status;
1479
1480 dbg("%s - port %d", __func__, port->number);
1481
1482 if (edge_port == NULL)
1483 return;
1484
1485 if (!edge_port->open) {
1486 dbg("%s - port not opened", __func__);
1487 return;
1488 }
1489
1490 /* if we are implementing XON/XOFF, send the stop character */
1491 if (I_IXOFF(tty)) {
1492 unsigned char stop_char = STOP_CHAR(tty);
1493 status = edge_write(tty, port, &stop_char, 1);
1494 if (status <= 0)
1495 return;
1496 }
1497
1498 /* if we are implementing RTS/CTS, toggle that line */
1499 if (tty->termios->c_cflag & CRTSCTS) {
1500 edge_port->shadowMCR &= ~MCR_RTS;
1501 status = send_cmd_write_uart_register(edge_port, MCR,
1502 edge_port->shadowMCR);
1503 if (status != 0)
1504 return;
1505 }
1506
1507 return;
1508 }
1509
1510
1511 /*****************************************************************************
1512 * edge_unthrottle
1513 * this function is called by the tty driver when it wants to resume the
1514 * data being read from the port (called after SerialThrottle is called)
1515 *****************************************************************************/
1516 static void edge_unthrottle(struct tty_struct *tty)
1517 {
1518 struct usb_serial_port *port = tty->driver_data;
1519 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1520 int status;
1521
1522 dbg("%s - port %d", __func__, port->number);
1523
1524 if (edge_port == NULL)
1525 return;
1526
1527 if (!edge_port->open) {
1528 dbg("%s - port not opened", __func__);
1529 return;
1530 }
1531
1532 /* if we are implementing XON/XOFF, send the start character */
1533 if (I_IXOFF(tty)) {
1534 unsigned char start_char = START_CHAR(tty);
1535 status = edge_write(tty, port, &start_char, 1);
1536 if (status <= 0)
1537 return;
1538 }
1539 /* if we are implementing RTS/CTS, toggle that line */
1540 if (tty->termios->c_cflag & CRTSCTS) {
1541 edge_port->shadowMCR |= MCR_RTS;
1542 send_cmd_write_uart_register(edge_port, MCR,
1543 edge_port->shadowMCR);
1544 }
1545 }
1546
1547
1548 /*****************************************************************************
1549 * SerialSetTermios
1550 * this function is called by the tty driver when it wants to change
1551 * the termios structure
1552 *****************************************************************************/
1553 static void edge_set_termios(struct tty_struct *tty,
1554 struct usb_serial_port *port, struct ktermios *old_termios)
1555 {
1556 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1557 unsigned int cflag;
1558
1559 cflag = tty->termios->c_cflag;
1560 dbg("%s - clfag %08x iflag %08x", __func__,
1561 tty->termios->c_cflag, tty->termios->c_iflag);
1562 dbg("%s - old clfag %08x old iflag %08x", __func__,
1563 old_termios->c_cflag, old_termios->c_iflag);
1564
1565 dbg("%s - port %d", __func__, port->number);
1566
1567 if (edge_port == NULL)
1568 return;
1569
1570 if (!edge_port->open) {
1571 dbg("%s - port not opened", __func__);
1572 return;
1573 }
1574
1575 /* change the port settings to the new ones specified */
1576 change_port_settings(tty, edge_port, old_termios);
1577 }
1578
1579
1580 /*****************************************************************************
1581 * get_lsr_info - get line status register info
1582 *
1583 * Purpose: Let user call ioctl() to get info when the UART physically
1584 * is emptied. On bus types like RS485, the transmitter must
1585 * release the bus after transmitting. This must be done when
1586 * the transmit shift register is empty, not be done when the
1587 * transmit holding register is empty. This functionality
1588 * allows an RS485 driver to be written in user space.
1589 *****************************************************************************/
1590 static int get_lsr_info(struct edgeport_port *edge_port,
1591 unsigned int __user *value)
1592 {
1593 unsigned int result = 0;
1594 unsigned long flags;
1595
1596 spin_lock_irqsave(&edge_port->ep_lock, flags);
1597 if (edge_port->maxTxCredits == edge_port->txCredits &&
1598 edge_port->txfifo.count == 0) {
1599 dbg("%s -- Empty", __func__);
1600 result = TIOCSER_TEMT;
1601 }
1602 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1603
1604 if (copy_to_user(value, &result, sizeof(int)))
1605 return -EFAULT;
1606 return 0;
1607 }
1608
1609 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
1610 unsigned int set, unsigned int clear)
1611 {
1612 struct usb_serial_port *port = tty->driver_data;
1613 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1614 unsigned int mcr;
1615
1616 dbg("%s - port %d", __func__, port->number);
1617
1618 mcr = edge_port->shadowMCR;
1619 if (set & TIOCM_RTS)
1620 mcr |= MCR_RTS;
1621 if (set & TIOCM_DTR)
1622 mcr |= MCR_DTR;
1623 if (set & TIOCM_LOOP)
1624 mcr |= MCR_LOOPBACK;
1625
1626 if (clear & TIOCM_RTS)
1627 mcr &= ~MCR_RTS;
1628 if (clear & TIOCM_DTR)
1629 mcr &= ~MCR_DTR;
1630 if (clear & TIOCM_LOOP)
1631 mcr &= ~MCR_LOOPBACK;
1632
1633 edge_port->shadowMCR = mcr;
1634
1635 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1636
1637 return 0;
1638 }
1639
1640 static int edge_tiocmget(struct tty_struct *tty, struct file *file)
1641 {
1642 struct usb_serial_port *port = tty->driver_data;
1643 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1644 unsigned int result = 0;
1645 unsigned int msr;
1646 unsigned int mcr;
1647
1648 dbg("%s - port %d", __func__, port->number);
1649
1650 msr = edge_port->shadowMSR;
1651 mcr = edge_port->shadowMCR;
1652 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1653 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1654 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1655 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1656 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1657 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1658
1659
1660 dbg("%s -- %x", __func__, result);
1661
1662 return result;
1663 }
1664
1665 static int get_serial_info(struct edgeport_port *edge_port,
1666 struct serial_struct __user *retinfo)
1667 {
1668 struct serial_struct tmp;
1669
1670 if (!retinfo)
1671 return -EFAULT;
1672
1673 memset(&tmp, 0, sizeof(tmp));
1674
1675 tmp.type = PORT_16550A;
1676 tmp.line = edge_port->port->serial->minor;
1677 tmp.port = edge_port->port->number;
1678 tmp.irq = 0;
1679 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1680 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1681 tmp.baud_base = 9600;
1682 tmp.close_delay = 5*HZ;
1683 tmp.closing_wait = 30*HZ;
1684
1685 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1686 return -EFAULT;
1687 return 0;
1688 }
1689
1690
1691
1692 /*****************************************************************************
1693 * SerialIoctl
1694 * this function handles any ioctl calls to the driver
1695 *****************************************************************************/
1696 static int edge_ioctl(struct tty_struct *tty, struct file *file,
1697 unsigned int cmd, unsigned long arg)
1698 {
1699 struct usb_serial_port *port = tty->driver_data;
1700 DEFINE_WAIT(wait);
1701 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1702 struct async_icount cnow;
1703 struct async_icount cprev;
1704 struct serial_icounter_struct icount;
1705
1706 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1707
1708 switch (cmd) {
1709 case TIOCSERGETLSR:
1710 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
1711 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1712
1713 case TIOCGSERIAL:
1714 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
1715 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1716
1717 case TIOCMIWAIT:
1718 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
1719 cprev = edge_port->icount;
1720 while (1) {
1721 prepare_to_wait(&edge_port->delta_msr_wait,
1722 &wait, TASK_INTERRUPTIBLE);
1723 schedule();
1724 finish_wait(&edge_port->delta_msr_wait, &wait);
1725 /* see if a signal did it */
1726 if (signal_pending(current))
1727 return -ERESTARTSYS;
1728 cnow = edge_port->icount;
1729 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1730 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1731 return -EIO; /* no change => error */
1732 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1733 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1734 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1735 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1736 return 0;
1737 }
1738 cprev = cnow;
1739 }
1740 /* NOTREACHED */
1741 break;
1742
1743 case TIOCGICOUNT:
1744 cnow = edge_port->icount;
1745 memset(&icount, 0, sizeof(icount));
1746 icount.cts = cnow.cts;
1747 icount.dsr = cnow.dsr;
1748 icount.rng = cnow.rng;
1749 icount.dcd = cnow.dcd;
1750 icount.rx = cnow.rx;
1751 icount.tx = cnow.tx;
1752 icount.frame = cnow.frame;
1753 icount.overrun = cnow.overrun;
1754 icount.parity = cnow.parity;
1755 icount.brk = cnow.brk;
1756 icount.buf_overrun = cnow.buf_overrun;
1757
1758 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1759 __func__, port->number, icount.rx, icount.tx);
1760 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1761 return -EFAULT;
1762 return 0;
1763 }
1764 return -ENOIOCTLCMD;
1765 }
1766
1767
1768 /*****************************************************************************
1769 * SerialBreak
1770 * this function sends a break to the port
1771 *****************************************************************************/
1772 static void edge_break(struct tty_struct *tty, int break_state)
1773 {
1774 struct usb_serial_port *port = tty->driver_data;
1775 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1776 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1777 int status;
1778
1779 if ((!edge_serial->is_epic) ||
1780 ((edge_serial->is_epic) &&
1781 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1782 /* flush and chase */
1783 edge_port->chaseResponsePending = true;
1784
1785 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1786 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1787 if (status == 0) {
1788 /* block until chase finished */
1789 block_until_chase_response(edge_port);
1790 } else {
1791 edge_port->chaseResponsePending = false;
1792 }
1793 }
1794
1795 if ((!edge_serial->is_epic) ||
1796 ((edge_serial->is_epic) &&
1797 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1798 if (break_state == -1) {
1799 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1800 status = send_iosp_ext_cmd(edge_port,
1801 IOSP_CMD_SET_BREAK, 0);
1802 } else {
1803 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1804 status = send_iosp_ext_cmd(edge_port,
1805 IOSP_CMD_CLEAR_BREAK, 0);
1806 }
1807 if (status)
1808 dbg("%s - error sending break set/clear command.",
1809 __func__);
1810 }
1811
1812 return;
1813 }
1814
1815
1816 /*****************************************************************************
1817 * process_rcvd_data
1818 * this function handles the data received on the bulk in pipe.
1819 *****************************************************************************/
1820 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1821 unsigned char *buffer, __u16 bufferLength)
1822 {
1823 struct usb_serial_port *port;
1824 struct edgeport_port *edge_port;
1825 struct tty_struct *tty;
1826 __u16 lastBufferLength;
1827 __u16 rxLen;
1828
1829 dbg("%s", __func__);
1830
1831 lastBufferLength = bufferLength + 1;
1832
1833 while (bufferLength > 0) {
1834 /* failsafe incase we get a message that we don't understand */
1835 if (lastBufferLength == bufferLength) {
1836 dbg("%s - stuck in loop, exiting it.", __func__);
1837 break;
1838 }
1839 lastBufferLength = bufferLength;
1840
1841 switch (edge_serial->rxState) {
1842 case EXPECT_HDR1:
1843 edge_serial->rxHeader1 = *buffer;
1844 ++buffer;
1845 --bufferLength;
1846
1847 if (bufferLength == 0) {
1848 edge_serial->rxState = EXPECT_HDR2;
1849 break;
1850 }
1851 /* otherwise, drop on through */
1852 case EXPECT_HDR2:
1853 edge_serial->rxHeader2 = *buffer;
1854 ++buffer;
1855 --bufferLength;
1856
1857 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1858 edge_serial->rxHeader1, edge_serial->rxHeader2);
1859 /* Process depending on whether this header is
1860 * data or status */
1861
1862 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1863 /* Decode this status header and go to
1864 * EXPECT_HDR1 (if we can process the status
1865 * with only 2 bytes), or go to EXPECT_HDR3 to
1866 * get the third byte. */
1867 edge_serial->rxPort =
1868 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1869 edge_serial->rxStatusCode =
1870 IOSP_GET_STATUS_CODE(
1871 edge_serial->rxHeader1);
1872
1873 if (!IOSP_STATUS_IS_2BYTE(
1874 edge_serial->rxStatusCode)) {
1875 /* This status needs additional bytes.
1876 * Save what we have and then wait for
1877 * more data.
1878 */
1879 edge_serial->rxStatusParam
1880 = edge_serial->rxHeader2;
1881 edge_serial->rxState = EXPECT_HDR3;
1882 break;
1883 }
1884 /* We have all the header bytes, process the
1885 status now */
1886 process_rcvd_status(edge_serial,
1887 edge_serial->rxHeader2, 0);
1888 edge_serial->rxState = EXPECT_HDR1;
1889 break;
1890 } else {
1891 edge_serial->rxPort =
1892 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1893 edge_serial->rxBytesRemaining =
1894 IOSP_GET_HDR_DATA_LEN(
1895 edge_serial->rxHeader1,
1896 edge_serial->rxHeader2);
1897 dbg("%s - Data for Port %u Len %u",
1898 __func__,
1899 edge_serial->rxPort,
1900 edge_serial->rxBytesRemaining);
1901
1902 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1903 * ASSERT(DevExt->RxBytesRemaining <
1904 * IOSP_MAX_DATA_LENGTH);
1905 */
1906
1907 if (bufferLength == 0) {
1908 edge_serial->rxState = EXPECT_DATA;
1909 break;
1910 }
1911 /* Else, drop through */
1912 }
1913 case EXPECT_DATA: /* Expect data */
1914 if (bufferLength < edge_serial->rxBytesRemaining) {
1915 rxLen = bufferLength;
1916 /* Expect data to start next buffer */
1917 edge_serial->rxState = EXPECT_DATA;
1918 } else {
1919 /* BufLen >= RxBytesRemaining */
1920 rxLen = edge_serial->rxBytesRemaining;
1921 /* Start another header next time */
1922 edge_serial->rxState = EXPECT_HDR1;
1923 }
1924
1925 bufferLength -= rxLen;
1926 edge_serial->rxBytesRemaining -= rxLen;
1927
1928 /* spit this data back into the tty driver if this
1929 port is open */
1930 if (rxLen) {
1931 port = edge_serial->serial->port[
1932 edge_serial->rxPort];
1933 edge_port = usb_get_serial_port_data(port);
1934 if (edge_port->open) {
1935 tty = tty_port_tty_get(
1936 &edge_port->port->port);
1937 if (tty) {
1938 dbg("%s - Sending %d bytes to TTY for port %d",
1939 __func__, rxLen, edge_serial->rxPort);
1940 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1941 tty_kref_put(tty);
1942 }
1943 edge_port->icount.rx += rxLen;
1944 }
1945 buffer += rxLen;
1946 }
1947 break;
1948
1949 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1950 edge_serial->rxHeader3 = *buffer;
1951 ++buffer;
1952 --bufferLength;
1953
1954 /* We have all the header bytes, process the
1955 status now */
1956 process_rcvd_status(edge_serial,
1957 edge_serial->rxStatusParam,
1958 edge_serial->rxHeader3);
1959 edge_serial->rxState = EXPECT_HDR1;
1960 break;
1961 }
1962 }
1963 }
1964
1965
1966 /*****************************************************************************
1967 * process_rcvd_status
1968 * this function handles the any status messages received on the
1969 * bulk in pipe.
1970 *****************************************************************************/
1971 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1972 __u8 byte2, __u8 byte3)
1973 {
1974 struct usb_serial_port *port;
1975 struct edgeport_port *edge_port;
1976 struct tty_struct *tty;
1977 __u8 code = edge_serial->rxStatusCode;
1978
1979 /* switch the port pointer to the one being currently talked about */
1980 port = edge_serial->serial->port[edge_serial->rxPort];
1981 edge_port = usb_get_serial_port_data(port);
1982 if (edge_port == NULL) {
1983 dev_err(&edge_serial->serial->dev->dev,
1984 "%s - edge_port == NULL for port %d\n",
1985 __func__, edge_serial->rxPort);
1986 return;
1987 }
1988
1989 dbg("%s - port %d", __func__, edge_serial->rxPort);
1990
1991 if (code == IOSP_EXT_STATUS) {
1992 switch (byte2) {
1993 case IOSP_EXT_STATUS_CHASE_RSP:
1994 /* we want to do EXT status regardless of port
1995 * open/closed */
1996 dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1997 __func__, edge_serial->rxPort, byte3);
1998 /* Currently, the only EXT_STATUS is Chase, so process
1999 * here instead of one more call to one more subroutine
2000 * If/when more EXT_STATUS, there'll be more work to do
2001 * Also, we currently clear flag and close the port
2002 * regardless of content of above's Byte3.
2003 * We could choose to do something else when Byte3 says
2004 * Timeout on Chase from Edgeport, like wait longer in
2005 * block_until_chase_response, but for now we don't.
2006 */
2007 edge_port->chaseResponsePending = false;
2008 wake_up(&edge_port->wait_chase);
2009 return;
2010
2011 case IOSP_EXT_STATUS_RX_CHECK_RSP:
2012 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__, edge_serial->rxPort, byte3);
2013 /* Port->RxCheckRsp = true; */
2014 return;
2015 }
2016 }
2017
2018 if (code == IOSP_STATUS_OPEN_RSP) {
2019 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
2020 edge_port->maxTxCredits = edge_port->txCredits;
2021 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
2022 handle_new_msr(edge_port, byte2);
2023
2024 /* send the current line settings to the port so we are
2025 in sync with any further termios calls */
2026 tty = tty_port_tty_get(&edge_port->port->port);
2027 if (tty) {
2028 change_port_settings(tty,
2029 edge_port, tty->termios);
2030 tty_kref_put(tty);
2031 }
2032
2033 /* we have completed the open */
2034 edge_port->openPending = false;
2035 edge_port->open = true;
2036 wake_up(&edge_port->wait_open);
2037 return;
2038 }
2039
2040 /* If port is closed, silently discard all rcvd status. We can
2041 * have cases where buffered status is received AFTER the close
2042 * port command is sent to the Edgeport.
2043 */
2044 if (!edge_port->open || edge_port->closePending)
2045 return;
2046
2047 switch (code) {
2048 /* Not currently sent by Edgeport */
2049 case IOSP_STATUS_LSR:
2050 dbg("%s - Port %u LSR Status = %02x",
2051 __func__, edge_serial->rxPort, byte2);
2052 handle_new_lsr(edge_port, false, byte2, 0);
2053 break;
2054
2055 case IOSP_STATUS_LSR_DATA:
2056 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2057 __func__, edge_serial->rxPort, byte2, byte3);
2058 /* byte2 is LSR Register */
2059 /* byte3 is broken data byte */
2060 handle_new_lsr(edge_port, true, byte2, byte3);
2061 break;
2062 /*
2063 * case IOSP_EXT_4_STATUS:
2064 * dbg("%s - Port %u LSR Status = %02x Data = %02x",
2065 * __func__, edge_serial->rxPort, byte2, byte3);
2066 * break;
2067 */
2068 case IOSP_STATUS_MSR:
2069 dbg("%s - Port %u MSR Status = %02x",
2070 __func__, edge_serial->rxPort, byte2);
2071 /*
2072 * Process this new modem status and generate appropriate
2073 * events, etc, based on the new status. This routine
2074 * also saves the MSR in Port->ShadowMsr.
2075 */
2076 handle_new_msr(edge_port, byte2);
2077 break;
2078
2079 default:
2080 dbg("%s - Unrecognized IOSP status code %u\n", __func__, code);
2081 break;
2082 }
2083 return;
2084 }
2085
2086
2087 /*****************************************************************************
2088 * edge_tty_recv
2089 * this function passes data on to the tty flip buffer
2090 *****************************************************************************/
2091 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2092 unsigned char *data, int length)
2093 {
2094 int cnt;
2095
2096 do {
2097 cnt = tty_buffer_request_room(tty, length);
2098 if (cnt < length) {
2099 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2100 __func__, length - cnt);
2101 if (cnt == 0)
2102 break;
2103 }
2104 tty_insert_flip_string(tty, data, cnt);
2105 data += cnt;
2106 length -= cnt;
2107 } while (length > 0);
2108
2109 tty_flip_buffer_push(tty);
2110 }
2111
2112
2113 /*****************************************************************************
2114 * handle_new_msr
2115 * this function handles any change to the msr register for a port.
2116 *****************************************************************************/
2117 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2118 {
2119 struct async_icount *icount;
2120
2121 dbg("%s %02x", __func__, newMsr);
2122
2123 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2124 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2125 icount = &edge_port->icount;
2126
2127 /* update input line counters */
2128 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2129 icount->cts++;
2130 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2131 icount->dsr++;
2132 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2133 icount->dcd++;
2134 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2135 icount->rng++;
2136 wake_up_interruptible(&edge_port->delta_msr_wait);
2137 }
2138
2139 /* Save the new modem status */
2140 edge_port->shadowMSR = newMsr & 0xf0;
2141
2142 return;
2143 }
2144
2145
2146 /*****************************************************************************
2147 * handle_new_lsr
2148 * this function handles any change to the lsr register for a port.
2149 *****************************************************************************/
2150 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2151 __u8 lsr, __u8 data)
2152 {
2153 __u8 newLsr = (__u8) (lsr & (__u8)
2154 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2155 struct async_icount *icount;
2156
2157 dbg("%s - %02x", __func__, newLsr);
2158
2159 edge_port->shadowLSR = lsr;
2160
2161 if (newLsr & LSR_BREAK) {
2162 /*
2163 * Parity and Framing errors only count if they
2164 * occur exclusive of a break being
2165 * received.
2166 */
2167 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2168 }
2169
2170 /* Place LSR data byte into Rx buffer */
2171 if (lsrData) {
2172 struct tty_struct *tty =
2173 tty_port_tty_get(&edge_port->port->port);
2174 if (tty) {
2175 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2176 tty_kref_put(tty);
2177 }
2178 }
2179 /* update input line counters */
2180 icount = &edge_port->icount;
2181 if (newLsr & LSR_BREAK)
2182 icount->brk++;
2183 if (newLsr & LSR_OVER_ERR)
2184 icount->overrun++;
2185 if (newLsr & LSR_PAR_ERR)
2186 icount->parity++;
2187 if (newLsr & LSR_FRM_ERR)
2188 icount->frame++;
2189
2190 return;
2191 }
2192
2193
2194 /****************************************************************************
2195 * sram_write
2196 * writes a number of bytes to the Edgeport device's sram starting at the
2197 * given address.
2198 * If successful returns the number of bytes written, otherwise it returns
2199 * a negative error number of the problem.
2200 ****************************************************************************/
2201 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2202 __u16 length, const __u8 *data)
2203 {
2204 int result;
2205 __u16 current_length;
2206 unsigned char *transfer_buffer;
2207
2208 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2209
2210 transfer_buffer = kmalloc(64, GFP_KERNEL);
2211 if (!transfer_buffer) {
2212 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2213 __func__, 64);
2214 return -ENOMEM;
2215 }
2216
2217 /* need to split these writes up into 64 byte chunks */
2218 result = 0;
2219 while (length > 0) {
2220 if (length > 64)
2221 current_length = 64;
2222 else
2223 current_length = length;
2224
2225 /* dbg("%s - writing %x, %x, %d", __func__,
2226 extAddr, addr, current_length); */
2227 memcpy(transfer_buffer, data, current_length);
2228 result = usb_control_msg(serial->dev,
2229 usb_sndctrlpipe(serial->dev, 0),
2230 USB_REQUEST_ION_WRITE_RAM,
2231 0x40, addr, extAddr, transfer_buffer,
2232 current_length, 300);
2233 if (result < 0)
2234 break;
2235 length -= current_length;
2236 addr += current_length;
2237 data += current_length;
2238 }
2239
2240 kfree(transfer_buffer);
2241 return result;
2242 }
2243
2244
2245 /****************************************************************************
2246 * rom_write
2247 * writes a number of bytes to the Edgeport device's ROM starting at the
2248 * given address.
2249 * If successful returns the number of bytes written, otherwise it returns
2250 * a negative error number of the problem.
2251 ****************************************************************************/
2252 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2253 __u16 length, const __u8 *data)
2254 {
2255 int result;
2256 __u16 current_length;
2257 unsigned char *transfer_buffer;
2258
2259 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2260
2261 transfer_buffer = kmalloc(64, GFP_KERNEL);
2262 if (!transfer_buffer) {
2263 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2264 __func__, 64);
2265 return -ENOMEM;
2266 }
2267
2268 /* need to split these writes up into 64 byte chunks */
2269 result = 0;
2270 while (length > 0) {
2271 if (length > 64)
2272 current_length = 64;
2273 else
2274 current_length = length;
2275 /* dbg("%s - writing %x, %x, %d", __func__,
2276 extAddr, addr, current_length); */
2277 memcpy(transfer_buffer, data, current_length);
2278 result = usb_control_msg(serial->dev,
2279 usb_sndctrlpipe(serial->dev, 0),
2280 USB_REQUEST_ION_WRITE_ROM, 0x40,
2281 addr, extAddr,
2282 transfer_buffer, current_length, 300);
2283 if (result < 0)
2284 break;
2285 length -= current_length;
2286 addr += current_length;
2287 data += current_length;
2288 }
2289
2290 kfree(transfer_buffer);
2291 return result;
2292 }
2293
2294
2295 /****************************************************************************
2296 * rom_read
2297 * reads a number of bytes from the Edgeport device starting at the given
2298 * address.
2299 * If successful returns the number of bytes read, otherwise it returns
2300 * a negative error number of the problem.
2301 ****************************************************************************/
2302 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2303 __u16 addr, __u16 length, __u8 *data)
2304 {
2305 int result;
2306 __u16 current_length;
2307 unsigned char *transfer_buffer;
2308
2309 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2310
2311 transfer_buffer = kmalloc(64, GFP_KERNEL);
2312 if (!transfer_buffer) {
2313 dev_err(&serial->dev->dev,
2314 "%s - kmalloc(%d) failed.\n", __func__, 64);
2315 return -ENOMEM;
2316 }
2317
2318 /* need to split these reads up into 64 byte chunks */
2319 result = 0;
2320 while (length > 0) {
2321 if (length > 64)
2322 current_length = 64;
2323 else
2324 current_length = length;
2325 /* dbg("%s - %x, %x, %d", __func__,
2326 extAddr, addr, current_length); */
2327 result = usb_control_msg(serial->dev,
2328 usb_rcvctrlpipe(serial->dev, 0),
2329 USB_REQUEST_ION_READ_ROM,
2330 0xC0, addr, extAddr, transfer_buffer,
2331 current_length, 300);
2332 if (result < 0)
2333 break;
2334 memcpy(data, transfer_buffer, current_length);
2335 length -= current_length;
2336 addr += current_length;
2337 data += current_length;
2338 }
2339
2340 kfree(transfer_buffer);
2341 return result;
2342 }
2343
2344
2345 /****************************************************************************
2346 * send_iosp_ext_cmd
2347 * Is used to send a IOSP message to the Edgeport device
2348 ****************************************************************************/
2349 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2350 __u8 command, __u8 param)
2351 {
2352 unsigned char *buffer;
2353 unsigned char *currentCommand;
2354 int length = 0;
2355 int status = 0;
2356
2357 dbg("%s - %d, %d", __func__, command, param);
2358
2359 buffer = kmalloc(10, GFP_ATOMIC);
2360 if (!buffer) {
2361 dev_err(&edge_port->port->dev,
2362 "%s - kmalloc(%d) failed.\n", __func__, 10);
2363 return -ENOMEM;
2364 }
2365
2366 currentCommand = buffer;
2367
2368 MAKE_CMD_EXT_CMD(&currentCommand, &length,
2369 edge_port->port->number - edge_port->port->serial->minor,
2370 command, param);
2371
2372 status = write_cmd_usb(edge_port, buffer, length);
2373 if (status) {
2374 /* something bad happened, let's free up the memory */
2375 kfree(buffer);
2376 }
2377
2378 return status;
2379 }
2380
2381
2382 /*****************************************************************************
2383 * write_cmd_usb
2384 * this function writes the given buffer out to the bulk write endpoint.
2385 *****************************************************************************/
2386 static int write_cmd_usb(struct edgeport_port *edge_port,
2387 unsigned char *buffer, int length)
2388 {
2389 struct edgeport_serial *edge_serial =
2390 usb_get_serial_data(edge_port->port->serial);
2391 int status = 0;
2392 struct urb *urb;
2393 int timeout;
2394
2395 usb_serial_debug_data(debug, &edge_port->port->dev,
2396 __func__, length, buffer);
2397
2398 /* Allocate our next urb */
2399 urb = usb_alloc_urb(0, GFP_ATOMIC);
2400 if (!urb)
2401 return -ENOMEM;
2402
2403 atomic_inc(&CmdUrbs);
2404 dbg("%s - ALLOCATE URB %p (outstanding %d)",
2405 __func__, urb, atomic_read(&CmdUrbs));
2406
2407 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2408 usb_sndbulkpipe(edge_serial->serial->dev,
2409 edge_serial->bulk_out_endpoint),
2410 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2411
2412 edge_port->commandPending = true;
2413 status = usb_submit_urb(urb, GFP_ATOMIC);
2414
2415 if (status) {
2416 /* something went wrong */
2417 dev_err(&edge_port->port->dev,
2418 "%s - usb_submit_urb(write command) failed, status = %d\n",
2419 __func__, status);
2420 usb_kill_urb(urb);
2421 usb_free_urb(urb);
2422 atomic_dec(&CmdUrbs);
2423 return status;
2424 }
2425
2426 /* wait for command to finish */
2427 timeout = COMMAND_TIMEOUT;
2428 #if 0
2429 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2430
2431 if (edge_port->commandPending) {
2432 /* command timed out */
2433 dbg("%s - command timed out", __func__);
2434 status = -EINVAL;
2435 }
2436 #endif
2437 return status;
2438 }
2439
2440
2441 /*****************************************************************************
2442 * send_cmd_write_baud_rate
2443 * this function sends the proper command to change the baud rate of the
2444 * specified port.
2445 *****************************************************************************/
2446 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2447 int baudRate)
2448 {
2449 struct edgeport_serial *edge_serial =
2450 usb_get_serial_data(edge_port->port->serial);
2451 unsigned char *cmdBuffer;
2452 unsigned char *currCmd;
2453 int cmdLen = 0;
2454 int divisor;
2455 int status;
2456 unsigned char number =
2457 edge_port->port->number - edge_port->port->serial->minor;
2458
2459 if (edge_serial->is_epic &&
2460 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2461 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2462 edge_port->port->number, baudRate);
2463 return 0;
2464 }
2465
2466 dbg("%s - port = %d, baud = %d", __func__,
2467 edge_port->port->number, baudRate);
2468
2469 status = calc_baud_rate_divisor(baudRate, &divisor);
2470 if (status) {
2471 dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2472 __func__);
2473 return status;
2474 }
2475
2476 /* Alloc memory for the string of commands. */
2477 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2478 if (!cmdBuffer) {
2479 dev_err(&edge_port->port->dev,
2480 "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2481 return -ENOMEM;
2482 }
2483 currCmd = cmdBuffer;
2484
2485 /* Enable access to divisor latch */
2486 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2487
2488 /* Write the divisor itself */
2489 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2490 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2491
2492 /* Restore original value to disable access to divisor latch */
2493 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2494 edge_port->shadowLCR);
2495
2496 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2497 if (status) {
2498 /* something bad happened, let's free up the memory */
2499 kfree(cmdBuffer);
2500 }
2501
2502 return status;
2503 }
2504
2505
2506 /*****************************************************************************
2507 * calc_baud_rate_divisor
2508 * this function calculates the proper baud rate divisor for the specified
2509 * baud rate.
2510 *****************************************************************************/
2511 static int calc_baud_rate_divisor(int baudrate, int *divisor)
2512 {
2513 int i;
2514 __u16 custom;
2515
2516
2517 dbg("%s - %d", __func__, baudrate);
2518
2519 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2520 if (divisor_table[i].BaudRate == baudrate) {
2521 *divisor = divisor_table[i].Divisor;
2522 return 0;
2523 }
2524 }
2525
2526 /* We have tried all of the standard baud rates
2527 * lets try to calculate the divisor for this baud rate
2528 * Make sure the baud rate is reasonable */
2529 if (baudrate > 50 && baudrate < 230400) {
2530 /* get divisor */
2531 custom = (__u16)((230400L + baudrate/2) / baudrate);
2532
2533 *divisor = custom;
2534
2535 dbg("%s - Baud %d = %d\n", __func__, baudrate, custom);
2536 return 0;
2537 }
2538
2539 return -1;
2540 }
2541
2542
2543 /*****************************************************************************
2544 * send_cmd_write_uart_register
2545 * this function builds up a uart register message and sends to to the device.
2546 *****************************************************************************/
2547 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2548 __u8 regNum, __u8 regValue)
2549 {
2550 struct edgeport_serial *edge_serial =
2551 usb_get_serial_data(edge_port->port->serial);
2552 unsigned char *cmdBuffer;
2553 unsigned char *currCmd;
2554 unsigned long cmdLen = 0;
2555 int status;
2556
2557 dbg("%s - write to %s register 0x%02x",
2558 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2559
2560 if (edge_serial->is_epic &&
2561 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2562 regNum == MCR) {
2563 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2564 return 0;
2565 }
2566
2567 if (edge_serial->is_epic &&
2568 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2569 regNum == LCR) {
2570 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2571 return 0;
2572 }
2573
2574 /* Alloc memory for the string of commands. */
2575 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2576 if (cmdBuffer == NULL)
2577 return -ENOMEM;
2578
2579 currCmd = cmdBuffer;
2580
2581 /* Build a cmd in the buffer to write the given register */
2582 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2583 edge_port->port->number - edge_port->port->serial->minor,
2584 regNum, regValue);
2585
2586 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2587 if (status) {
2588 /* something bad happened, let's free up the memory */
2589 kfree(cmdBuffer);
2590 }
2591
2592 return status;
2593 }
2594
2595
2596 /*****************************************************************************
2597 * change_port_settings
2598 * This routine is called to set the UART on the device to match the
2599 * specified new settings.
2600 *****************************************************************************/
2601
2602 static void change_port_settings(struct tty_struct *tty,
2603 struct edgeport_port *edge_port, struct ktermios *old_termios)
2604 {
2605 struct edgeport_serial *edge_serial =
2606 usb_get_serial_data(edge_port->port->serial);
2607 int baud;
2608 unsigned cflag;
2609 __u8 mask = 0xff;
2610 __u8 lData;
2611 __u8 lParity;
2612 __u8 lStop;
2613 __u8 rxFlow;
2614 __u8 txFlow;
2615 int status;
2616
2617 dbg("%s - port %d", __func__, edge_port->port->number);
2618
2619 if (!edge_port->open &&
2620 !edge_port->openPending) {
2621 dbg("%s - port not opened", __func__);
2622 return;
2623 }
2624
2625 cflag = tty->termios->c_cflag;
2626
2627 switch (cflag & CSIZE) {
2628 case CS5:
2629 lData = LCR_BITS_5; mask = 0x1f;
2630 dbg("%s - data bits = 5", __func__);
2631 break;
2632 case CS6:
2633 lData = LCR_BITS_6; mask = 0x3f;
2634 dbg("%s - data bits = 6", __func__);
2635 break;
2636 case CS7:
2637 lData = LCR_BITS_7; mask = 0x7f;
2638 dbg("%s - data bits = 7", __func__);
2639 break;
2640 default:
2641 case CS8:
2642 lData = LCR_BITS_8;
2643 dbg("%s - data bits = 8", __func__);
2644 break;
2645 }
2646
2647 lParity = LCR_PAR_NONE;
2648 if (cflag & PARENB) {
2649 if (cflag & CMSPAR) {
2650 if (cflag & PARODD) {
2651 lParity = LCR_PAR_MARK;
2652 dbg("%s - parity = mark", __func__);
2653 } else {
2654 lParity = LCR_PAR_SPACE;
2655 dbg("%s - parity = space", __func__);
2656 }
2657 } else if (cflag & PARODD) {
2658 lParity = LCR_PAR_ODD;
2659 dbg("%s - parity = odd", __func__);
2660 } else {
2661 lParity = LCR_PAR_EVEN;
2662 dbg("%s - parity = even", __func__);
2663 }
2664 } else {
2665 dbg("%s - parity = none", __func__);
2666 }
2667
2668 if (cflag & CSTOPB) {
2669 lStop = LCR_STOP_2;
2670 dbg("%s - stop bits = 2", __func__);
2671 } else {
2672 lStop = LCR_STOP_1;
2673 dbg("%s - stop bits = 1", __func__);
2674 }
2675
2676 /* figure out the flow control settings */
2677 rxFlow = txFlow = 0x00;
2678 if (cflag & CRTSCTS) {
2679 rxFlow |= IOSP_RX_FLOW_RTS;
2680 txFlow |= IOSP_TX_FLOW_CTS;
2681 dbg("%s - RTS/CTS is enabled", __func__);
2682 } else {
2683 dbg("%s - RTS/CTS is disabled", __func__);
2684 }
2685
2686 /* if we are implementing XON/XOFF, set the start and stop character
2687 in the device */
2688 if (I_IXOFF(tty) || I_IXON(tty)) {
2689 unsigned char stop_char = STOP_CHAR(tty);
2690 unsigned char start_char = START_CHAR(tty);
2691
2692 if ((!edge_serial->is_epic) ||
2693 ((edge_serial->is_epic) &&
2694 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2695 send_iosp_ext_cmd(edge_port,
2696 IOSP_CMD_SET_XON_CHAR, start_char);
2697 send_iosp_ext_cmd(edge_port,
2698 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2699 }
2700
2701 /* if we are implementing INBOUND XON/XOFF */
2702 if (I_IXOFF(tty)) {
2703 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2704 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2705 __func__, start_char, stop_char);
2706 } else {
2707 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2708 }
2709
2710 /* if we are implementing OUTBOUND XON/XOFF */
2711 if (I_IXON(tty)) {
2712 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2713 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2714 __func__, start_char, stop_char);
2715 } else {
2716 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2717 }
2718 }
2719
2720 /* Set flow control to the configured value */
2721 if ((!edge_serial->is_epic) ||
2722 ((edge_serial->is_epic) &&
2723 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2724 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2725 if ((!edge_serial->is_epic) ||
2726 ((edge_serial->is_epic) &&
2727 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2728 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2729
2730
2731 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2732 edge_port->shadowLCR |= (lData | lParity | lStop);
2733
2734 edge_port->validDataMask = mask;
2735
2736 /* Send the updated LCR value to the EdgePort */
2737 status = send_cmd_write_uart_register(edge_port, LCR,
2738 edge_port->shadowLCR);
2739 if (status != 0)
2740 return;
2741
2742 /* set up the MCR register and send it to the EdgePort */
2743 edge_port->shadowMCR = MCR_MASTER_IE;
2744 if (cflag & CBAUD)
2745 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2746
2747 status = send_cmd_write_uart_register(edge_port, MCR,
2748 edge_port->shadowMCR);
2749 if (status != 0)
2750 return;
2751
2752 /* Determine divisor based on baud rate */
2753 baud = tty_get_baud_rate(tty);
2754 if (!baud) {
2755 /* pick a default, any default... */
2756 baud = 9600;
2757 }
2758
2759 dbg("%s - baud rate = %d", __func__, baud);
2760 status = send_cmd_write_baud_rate(edge_port, baud);
2761 if (status == -1) {
2762 /* Speed change was not possible - put back the old speed */
2763 baud = tty_termios_baud_rate(old_termios);
2764 tty_encode_baud_rate(tty, baud, baud);
2765 }
2766 return;
2767 }
2768
2769
2770 /****************************************************************************
2771 * unicode_to_ascii
2772 * Turns a string from Unicode into ASCII.
2773 * Doesn't do a good job with any characters that are outside the normal
2774 * ASCII range, but it's only for debugging...
2775 * NOTE: expects the unicode in LE format
2776 ****************************************************************************/
2777 static void unicode_to_ascii(char *string, int buflen,
2778 __le16 *unicode, int unicode_size)
2779 {
2780 int i;
2781
2782 if (buflen <= 0) /* never happens, but... */
2783 return;
2784 --buflen; /* space for nul */
2785
2786 for (i = 0; i < unicode_size; i++) {
2787 if (i >= buflen)
2788 break;
2789 string[i] = (char)(le16_to_cpu(unicode[i]));
2790 }
2791 string[i] = 0x00;
2792 }
2793
2794
2795 /****************************************************************************
2796 * get_manufacturing_desc
2797 * reads in the manufacturing descriptor and stores it into the serial
2798 * structure.
2799 ****************************************************************************/
2800 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2801 {
2802 int response;
2803
2804 dbg("getting manufacturer descriptor");
2805
2806 response = rom_read(edge_serial->serial,
2807 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2808 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2809 EDGE_MANUF_DESC_LEN,
2810 (__u8 *)(&edge_serial->manuf_descriptor));
2811
2812 if (response < 1)
2813 dev_err(&edge_serial->serial->dev->dev,
2814 "error in getting manufacturer descriptor\n");
2815 else {
2816 char string[30];
2817 dbg("**Manufacturer Descriptor");
2818 dbg(" RomSize: %dK",
2819 edge_serial->manuf_descriptor.RomSize);
2820 dbg(" RamSize: %dK",
2821 edge_serial->manuf_descriptor.RamSize);
2822 dbg(" CpuRev: %d",
2823 edge_serial->manuf_descriptor.CpuRev);
2824 dbg(" BoardRev: %d",
2825 edge_serial->manuf_descriptor.BoardRev);
2826 dbg(" NumPorts: %d",
2827 edge_serial->manuf_descriptor.NumPorts);
2828 dbg(" DescDate: %d/%d/%d",
2829 edge_serial->manuf_descriptor.DescDate[0],
2830 edge_serial->manuf_descriptor.DescDate[1],
2831 edge_serial->manuf_descriptor.DescDate[2]+1900);
2832 unicode_to_ascii(string, sizeof(string),
2833 edge_serial->manuf_descriptor.SerialNumber,
2834 edge_serial->manuf_descriptor.SerNumLength/2);
2835 dbg(" SerialNumber: %s", string);
2836 unicode_to_ascii(string, sizeof(string),
2837 edge_serial->manuf_descriptor.AssemblyNumber,
2838 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2839 dbg(" AssemblyNumber: %s", string);
2840 unicode_to_ascii(string, sizeof(string),
2841 edge_serial->manuf_descriptor.OemAssyNumber,
2842 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2843 dbg(" OemAssyNumber: %s", string);
2844 dbg(" UartType: %d",
2845 edge_serial->manuf_descriptor.UartType);
2846 dbg(" IonPid: %d",
2847 edge_serial->manuf_descriptor.IonPid);
2848 dbg(" IonConfig: %d",
2849 edge_serial->manuf_descriptor.IonConfig);
2850 }
2851 }
2852
2853
2854 /****************************************************************************
2855 * get_boot_desc
2856 * reads in the bootloader descriptor and stores it into the serial
2857 * structure.
2858 ****************************************************************************/
2859 static void get_boot_desc(struct edgeport_serial *edge_serial)
2860 {
2861 int response;
2862
2863 dbg("getting boot descriptor");
2864
2865 response = rom_read(edge_serial->serial,
2866 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2867 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2868 EDGE_BOOT_DESC_LEN,
2869 (__u8 *)(&edge_serial->boot_descriptor));
2870
2871 if (response < 1)
2872 dev_err(&edge_serial->serial->dev->dev,
2873 "error in getting boot descriptor\n");
2874 else {
2875 dbg("**Boot Descriptor:");
2876 dbg(" BootCodeLength: %d",
2877 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2878 dbg(" MajorVersion: %d",
2879 edge_serial->boot_descriptor.MajorVersion);
2880 dbg(" MinorVersion: %d",
2881 edge_serial->boot_descriptor.MinorVersion);
2882 dbg(" BuildNumber: %d",
2883 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2884 dbg(" Capabilities: 0x%x",
2885 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2886 dbg(" UConfig0: %d",
2887 edge_serial->boot_descriptor.UConfig0);
2888 dbg(" UConfig1: %d",
2889 edge_serial->boot_descriptor.UConfig1);
2890 }
2891 }
2892
2893
2894 /****************************************************************************
2895 * load_application_firmware
2896 * This is called to load the application firmware to the device
2897 ****************************************************************************/
2898 static void load_application_firmware(struct edgeport_serial *edge_serial)
2899 {
2900 const struct ihex_binrec *rec;
2901 const struct firmware *fw;
2902 const char *fw_name;
2903 const char *fw_info;
2904 int response;
2905 __u32 Operaddr;
2906 __u16 build;
2907
2908 switch (edge_serial->product_info.iDownloadFile) {
2909 case EDGE_DOWNLOAD_FILE_I930:
2910 fw_info = "downloading firmware version (930)";
2911 fw_name = "edgeport/down.fw";
2912 break;
2913
2914 case EDGE_DOWNLOAD_FILE_80251:
2915 fw_info = "downloading firmware version (80251)";
2916 fw_name = "edgeport/down2.fw";
2917 break;
2918
2919 case EDGE_DOWNLOAD_FILE_NONE:
2920 dbg ("No download file specified, skipping download\n");
2921 return;
2922
2923 default:
2924 return;
2925 }
2926
2927 response = request_ihex_firmware(&fw, fw_name,
2928 &edge_serial->serial->dev->dev);
2929 if (response) {
2930 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2931 fw_name, response);
2932 return;
2933 }
2934
2935 rec = (const struct ihex_binrec *)fw->data;
2936 build = (rec->data[2] << 8) | rec->data[3];
2937
2938 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2939
2940 edge_serial->product_info.FirmwareMajorVersion = fw->data[0];
2941 edge_serial->product_info.FirmwareMinorVersion = fw->data[1];
2942 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2943
2944 for (rec = ihex_next_binrec(rec); rec;
2945 rec = ihex_next_binrec(rec)) {
2946 Operaddr = be32_to_cpu(rec->addr);
2947 response = sram_write(edge_serial->serial,
2948 Operaddr >> 16,
2949 Operaddr & 0xFFFF,
2950 be16_to_cpu(rec->len),
2951 &rec->data[0]);
2952 if (response < 0) {
2953 dev_err(&edge_serial->serial->dev->dev,
2954 "sram_write failed (%x, %x, %d)\n",
2955 Operaddr >> 16, Operaddr & 0xFFFF,
2956 be16_to_cpu(rec->len));
2957 break;
2958 }
2959 }
2960
2961 dbg("sending exec_dl_code");
2962 response = usb_control_msg (edge_serial->serial->dev,
2963 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2964 USB_REQUEST_ION_EXEC_DL_CODE,
2965 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2966
2967 release_firmware(fw);
2968 return;
2969 }
2970
2971
2972 /****************************************************************************
2973 * edge_startup
2974 ****************************************************************************/
2975 static int edge_startup(struct usb_serial *serial)
2976 {
2977 struct edgeport_serial *edge_serial;
2978 struct edgeport_port *edge_port;
2979 struct usb_device *dev;
2980 int i, j;
2981 int response;
2982 bool interrupt_in_found;
2983 bool bulk_in_found;
2984 bool bulk_out_found;
2985 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2986 EDGE_COMPATIBILITY_MASK1,
2987 EDGE_COMPATIBILITY_MASK2 };
2988
2989 dev = serial->dev;
2990
2991 /* create our private serial structure */
2992 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2993 if (edge_serial == NULL) {
2994 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2995 return -ENOMEM;
2996 }
2997 spin_lock_init(&edge_serial->es_lock);
2998 edge_serial->serial = serial;
2999 usb_set_serial_data(serial, edge_serial);
3000
3001 /* get the name for the device from the device */
3002 i = get_string(dev, dev->descriptor.iManufacturer,
3003 &edge_serial->name[0], MAX_NAME_LEN+1);
3004 edge_serial->name[i++] = ' ';
3005 get_string(dev, dev->descriptor.iProduct,
3006 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
3007
3008 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
3009
3010 /* Read the epic descriptor */
3011 if (get_epic_descriptor(edge_serial) <= 0) {
3012 /* memcpy descriptor to Supports structures */
3013 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
3014 sizeof(struct edge_compatibility_bits));
3015
3016 /* get the manufacturing descriptor for this device */
3017 get_manufacturing_desc(edge_serial);
3018
3019 /* get the boot descriptor */
3020 get_boot_desc(edge_serial);
3021
3022 get_product_info(edge_serial);
3023 }
3024
3025 /* set the number of ports from the manufacturing description */
3026 /* serial->num_ports = serial->product_info.NumPorts; */
3027 if ((!edge_serial->is_epic) &&
3028 (edge_serial->product_info.NumPorts != serial->num_ports)) {
3029 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
3030 "vs. core thinking we have %d ports, email "
3031 "greg@kroah.com this information.\n",
3032 edge_serial->product_info.NumPorts,
3033 serial->num_ports);
3034 }
3035
3036 dbg("%s - time 1 %ld", __func__, jiffies);
3037
3038 /* If not an EPiC device */
3039 if (!edge_serial->is_epic) {
3040 /* now load the application firmware into this device */
3041 load_application_firmware(edge_serial);
3042
3043 dbg("%s - time 2 %ld", __func__, jiffies);
3044
3045 /* Check current Edgeport EEPROM and update if necessary */
3046 update_edgeport_E2PROM(edge_serial);
3047
3048 dbg("%s - time 3 %ld", __func__, jiffies);
3049
3050 /* set the configuration to use #1 */
3051 /* dbg("set_configuration 1"); */
3052 /* usb_set_configuration (dev, 1); */
3053 }
3054 dbg(" FirmwareMajorVersion %d.%d.%d",
3055 edge_serial->product_info.FirmwareMajorVersion,
3056 edge_serial->product_info.FirmwareMinorVersion,
3057 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3058
3059 /* we set up the pointers to the endpoints in the edge_open function,
3060 * as the structures aren't created yet. */
3061
3062 /* set up our port private structures */
3063 for (i = 0; i < serial->num_ports; ++i) {
3064 edge_port = kmalloc(sizeof(struct edgeport_port), GFP_KERNEL);
3065 if (edge_port == NULL) {
3066 dev_err(&serial->dev->dev, "%s - Out of memory\n",
3067 __func__);
3068 for (j = 0; j < i; ++j) {
3069 kfree(usb_get_serial_port_data(serial->port[j]));
3070 usb_set_serial_port_data(serial->port[j],
3071 NULL);
3072 }
3073 usb_set_serial_data(serial, NULL);
3074 kfree(edge_serial);
3075 return -ENOMEM;
3076 }
3077 memset(edge_port, 0, sizeof(struct edgeport_port));
3078 spin_lock_init(&edge_port->ep_lock);
3079 edge_port->port = serial->port[i];
3080 usb_set_serial_port_data(serial->port[i], edge_port);
3081 }
3082
3083 response = 0;
3084
3085 if (edge_serial->is_epic) {
3086 /* EPIC thing, set up our interrupt polling now and our read
3087 * urb, so that the device knows it really is connected. */
3088 interrupt_in_found = bulk_in_found = bulk_out_found = false;
3089 for (i = 0; i < serial->interface->altsetting[0]
3090 .desc.bNumEndpoints; ++i) {
3091 struct usb_endpoint_descriptor *endpoint;
3092 int buffer_size;
3093
3094 endpoint = &serial->interface->altsetting[0].
3095 endpoint[i].desc;
3096 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
3097 if (!interrupt_in_found &&
3098 (usb_endpoint_is_int_in(endpoint))) {
3099 /* we found a interrupt in endpoint */
3100 dbg("found interrupt in");
3101
3102 /* not set up yet, so do it now */
3103 edge_serial->interrupt_read_urb =
3104 usb_alloc_urb(0, GFP_KERNEL);
3105 if (!edge_serial->interrupt_read_urb) {
3106 dev_err(&dev->dev, "out of memory\n");
3107 return -ENOMEM;
3108 }
3109 edge_serial->interrupt_in_buffer =
3110 kmalloc(buffer_size, GFP_KERNEL);
3111 if (!edge_serial->interrupt_in_buffer) {
3112 dev_err(&dev->dev, "out of memory\n");
3113 usb_free_urb(edge_serial->interrupt_read_urb);
3114 return -ENOMEM;
3115 }
3116 edge_serial->interrupt_in_endpoint =
3117 endpoint->bEndpointAddress;
3118
3119 /* set up our interrupt urb */
3120 usb_fill_int_urb(
3121 edge_serial->interrupt_read_urb,
3122 dev,
3123 usb_rcvintpipe(dev,
3124 endpoint->bEndpointAddress),
3125 edge_serial->interrupt_in_buffer,
3126 buffer_size,
3127 edge_interrupt_callback,
3128 edge_serial,
3129 endpoint->bInterval);
3130
3131 interrupt_in_found = true;
3132 }
3133
3134 if (!bulk_in_found &&
3135 (usb_endpoint_is_bulk_in(endpoint))) {
3136 /* we found a bulk in endpoint */
3137 dbg("found bulk in");
3138
3139 /* not set up yet, so do it now */
3140 edge_serial->read_urb =
3141 usb_alloc_urb(0, GFP_KERNEL);
3142 if (!edge_serial->read_urb) {
3143 dev_err(&dev->dev, "out of memory\n");
3144 return -ENOMEM;
3145 }
3146 edge_serial->bulk_in_buffer =
3147 kmalloc(buffer_size, GFP_KERNEL);
3148 if (!edge_serial->bulk_in_buffer) {
3149 dev_err(&dev->dev, "out of memory\n");
3150 usb_free_urb(edge_serial->read_urb);
3151 return -ENOMEM;
3152 }
3153 edge_serial->bulk_in_endpoint =
3154 endpoint->bEndpointAddress;
3155
3156 /* set up our bulk in urb */
3157 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3158 usb_rcvbulkpipe(dev,
3159 endpoint->bEndpointAddress),
3160 edge_serial->bulk_in_buffer,
3161 le16_to_cpu(endpoint->wMaxPacketSize),
3162 edge_bulk_in_callback,
3163 edge_serial);
3164 bulk_in_found = true;
3165 }
3166
3167 if (!bulk_out_found &&
3168 (usb_endpoint_is_bulk_out(endpoint))) {
3169 /* we found a bulk out endpoint */
3170 dbg("found bulk out");
3171 edge_serial->bulk_out_endpoint =
3172 endpoint->bEndpointAddress;
3173 bulk_out_found = true;
3174 }
3175 }
3176
3177 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3178 dev_err(&dev->dev, "Error - the proper endpoints "
3179 "were not found!\n");
3180 return -ENODEV;
3181 }
3182
3183 /* start interrupt read for this edgeport this interrupt will
3184 * continue as long as the edgeport is connected */
3185 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3186 GFP_KERNEL);
3187 if (response)
3188 dev_err(&dev->dev,
3189 "%s - Error %d submitting control urb\n",
3190 __func__, response);
3191 }
3192 return response;
3193 }
3194
3195
3196 /****************************************************************************
3197 * edge_disconnect
3198 * This function is called whenever the device is removed from the usb bus.
3199 ****************************************************************************/
3200 static void edge_disconnect(struct usb_serial *serial)
3201 {
3202 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3203
3204 dbg("%s", __func__);
3205
3206 /* stop reads and writes on all ports */
3207 /* free up our endpoint stuff */
3208 if (edge_serial->is_epic) {
3209 usb_kill_urb(edge_serial->interrupt_read_urb);
3210 usb_free_urb(edge_serial->interrupt_read_urb);
3211 kfree(edge_serial->interrupt_in_buffer);
3212
3213 usb_kill_urb(edge_serial->read_urb);
3214 usb_free_urb(edge_serial->read_urb);
3215 kfree(edge_serial->bulk_in_buffer);
3216 }
3217 }
3218
3219
3220 /****************************************************************************
3221 * edge_release
3222 * This function is called when the device structure is deallocated.
3223 ****************************************************************************/
3224 static void edge_release(struct usb_serial *serial)
3225 {
3226 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3227 int i;
3228
3229 dbg("%s", __func__);
3230
3231 for (i = 0; i < serial->num_ports; ++i)
3232 kfree(usb_get_serial_port_data(serial->port[i]));
3233
3234 kfree(edge_serial);
3235 }
3236
3237
3238 /****************************************************************************
3239 * edgeport_init
3240 * This is called by the module subsystem, or on startup to initialize us
3241 ****************************************************************************/
3242 static int __init edgeport_init(void)
3243 {
3244 int retval;
3245
3246 retval = usb_serial_register(&edgeport_2port_device);
3247 if (retval)
3248 goto failed_2port_device_register;
3249 retval = usb_serial_register(&edgeport_4port_device);
3250 if (retval)
3251 goto failed_4port_device_register;
3252 retval = usb_serial_register(&edgeport_8port_device);
3253 if (retval)
3254 goto failed_8port_device_register;
3255 retval = usb_serial_register(&epic_device);
3256 if (retval)
3257 goto failed_epic_device_register;
3258 retval = usb_register(&io_driver);
3259 if (retval)
3260 goto failed_usb_register;
3261 atomic_set(&CmdUrbs, 0);
3262 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
3263 DRIVER_DESC "\n");
3264 return 0;
3265
3266 failed_usb_register:
3267 usb_serial_deregister(&epic_device);
3268 failed_epic_device_register:
3269 usb_serial_deregister(&edgeport_8port_device);
3270 failed_8port_device_register:
3271 usb_serial_deregister(&edgeport_4port_device);
3272 failed_4port_device_register:
3273 usb_serial_deregister(&edgeport_2port_device);
3274 failed_2port_device_register:
3275 return retval;
3276 }
3277
3278
3279 /****************************************************************************
3280 * edgeport_exit
3281 * Called when the driver is about to be unloaded.
3282 ****************************************************************************/
3283 static void __exit edgeport_exit (void)
3284 {
3285 usb_deregister(&io_driver);
3286 usb_serial_deregister(&edgeport_2port_device);
3287 usb_serial_deregister(&edgeport_4port_device);
3288 usb_serial_deregister(&edgeport_8port_device);
3289 usb_serial_deregister(&epic_device);
3290 }
3291
3292 module_init(edgeport_init);
3293 module_exit(edgeport_exit);
3294
3295 /* Module information */
3296 MODULE_AUTHOR(DRIVER_AUTHOR);
3297 MODULE_DESCRIPTION(DRIVER_DESC);
3298 MODULE_LICENSE("GPL");
3299 MODULE_FIRMWARE("edgeport/boot.fw");
3300 MODULE_FIRMWARE("edgeport/boot2.fw");
3301 MODULE_FIRMWARE("edgeport/down.fw");
3302 MODULE_FIRMWARE("edgeport/down2.fw");
3303
3304 module_param(debug, bool, S_IRUGO | S_IWUSR);
3305 MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux with added FPC-III support