projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
[deliverable/linux.git] / drivers / usb / serial / io_edgeport.c
1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/tty.h>
38 #include <linux/tty_driver.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/spinlock.h>
42 #include <linux/serial.h>
43 #include <linux/ioctl.h>
44 #include <linux/wait.h>
45 #include <linux/firmware.h>
46 #include <linux/ihex.h>
47 #include <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 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
55 #define DRIVER_DESC "Edgeport USB Serial Driver"
56
57 #define MAX_NAME_LEN 64
58
59 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
60 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
61 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
62
63 /* receive port state */
64 enum RXSTATE {
65 EXPECT_HDR1 = 0, /* Expect header byte 1 */
66 EXPECT_HDR2 = 1, /* Expect header byte 2 */
67 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
68 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
69 };
70
71
72 /* Transmit Fifo
73 * This Transmit queue is an extension of the edgeport Rx buffer.
74 * The maximum amount of data buffered in both the edgeport
75 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
76 */
77 struct TxFifo {
78 unsigned int head; /* index to head pointer (write) */
79 unsigned int tail; /* index to tail pointer (read) */
80 unsigned int count; /* Bytes in queue */
81 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
82 unsigned char *fifo; /* allocated Buffer */
83 };
84
85 /* This structure holds all of the local port information */
86 struct edgeport_port {
87 __u16 txCredits; /* our current credits for this port */
88 __u16 maxTxCredits; /* the max size of the port */
89
90 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
91 struct urb *write_urb; /* write URB for this port */
92 bool write_in_progress; /* 'true' while a write URB is outstanding */
93 spinlock_t ep_lock;
94
95 __u8 shadowLCR; /* last LCR value received */
96 __u8 shadowMCR; /* last MCR value received */
97 __u8 shadowMSR; /* last MSR value received */
98 __u8 shadowLSR; /* last LSR value received */
99 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
100 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
101 __u8 validDataMask;
102 __u32 baudRate;
103
104 bool open;
105 bool openPending;
106 bool commandPending;
107 bool closePending;
108 bool chaseResponsePending;
109
110 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
111 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
112 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
113 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
114
115 struct async_icount icount;
116 struct usb_serial_port *port; /* loop back to the owner of this object */
117 };
118
119
120 /* This structure holds all of the individual device information */
121 struct edgeport_serial {
122 char name[MAX_NAME_LEN+2]; /* string name of this device */
123
124 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
125 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
126 struct edgeport_product_info product_info; /* Product Info */
127 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
128 int is_epic; /* flag if EPiC device or not */
129
130 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
131 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
132 struct urb *interrupt_read_urb; /* our interrupt urb */
133
134 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
135 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
136 struct urb *read_urb; /* our bulk read urb */
137 bool read_in_progress;
138 spinlock_t es_lock;
139
140 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
141
142 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
143
144 enum RXSTATE rxState; /* the current state of the bulk receive processor */
145 __u8 rxHeader1; /* receive header byte 1 */
146 __u8 rxHeader2; /* receive header byte 2 */
147 __u8 rxHeader3; /* receive header byte 3 */
148 __u8 rxPort; /* the port that we are currently receiving data for */
149 __u8 rxStatusCode; /* the receive status code */
150 __u8 rxStatusParam; /* the receive status paramater */
151 __s16 rxBytesRemaining; /* the number of port bytes left to read */
152 struct usb_serial *serial; /* loop back to the owner of this object */
153 };
154
155 /* baud rate information */
156 struct divisor_table_entry {
157 __u32 BaudRate;
158 __u16 Divisor;
159 };
160
161 /*
162 * Define table of divisors for Rev A EdgePort/4 hardware
163 * These assume a 3.6864MHz crystal, the standard /16, and
164 * MCR.7 = 0.
165 */
166
167 static const struct divisor_table_entry divisor_table[] = {
168 { 50, 4608},
169 { 75, 3072},
170 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
171 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
172 { 150, 1536},
173 { 300, 768},
174 { 600, 384},
175 { 1200, 192},
176 { 1800, 128},
177 { 2400, 96},
178 { 4800, 48},
179 { 7200, 32},
180 { 9600, 24},
181 { 14400, 16},
182 { 19200, 12},
183 { 38400, 6},
184 { 57600, 4},
185 { 115200, 2},
186 { 230400, 1},
187 };
188
189 /* Number of outstanding Command Write Urbs */
190 static atomic_t CmdUrbs = ATOMIC_INIT(0);
191
192
193 /* local function prototypes */
194
195 /* function prototypes for all URB callbacks */
196 static void edge_interrupt_callback(struct urb *urb);
197 static void edge_bulk_in_callback(struct urb *urb);
198 static void edge_bulk_out_data_callback(struct urb *urb);
199 static void edge_bulk_out_cmd_callback(struct urb *urb);
200
201 /* function prototypes for the usbserial callbacks */
202 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
203 static void edge_close(struct usb_serial_port *port);
204 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
205 const unsigned char *buf, int count);
206 static int edge_write_room(struct tty_struct *tty);
207 static int edge_chars_in_buffer(struct tty_struct *tty);
208 static void edge_throttle(struct tty_struct *tty);
209 static void edge_unthrottle(struct tty_struct *tty);
210 static void edge_set_termios(struct tty_struct *tty,
211 struct usb_serial_port *port,
212 struct ktermios *old_termios);
213 static int edge_ioctl(struct tty_struct *tty,
214 unsigned int cmd, unsigned long arg);
215 static void edge_break(struct tty_struct *tty, int break_state);
216 static int edge_tiocmget(struct tty_struct *tty);
217 static int edge_tiocmset(struct tty_struct *tty,
218 unsigned int set, unsigned int clear);
219 static int edge_get_icount(struct tty_struct *tty,
220 struct serial_icounter_struct *icount);
221 static int edge_startup(struct usb_serial *serial);
222 static void edge_disconnect(struct usb_serial *serial);
223 static void edge_release(struct usb_serial *serial);
224 static int edge_port_probe(struct usb_serial_port *port);
225 static int edge_port_remove(struct usb_serial_port *port);
226
227 #include "io_tables.h" /* all of the devices that this driver supports */
228
229 /* function prototypes for all of our local functions */
230
231 static void process_rcvd_data(struct edgeport_serial *edge_serial,
232 unsigned char *buffer, __u16 bufferLength);
233 static void process_rcvd_status(struct edgeport_serial *edge_serial,
234 __u8 byte2, __u8 byte3);
235 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
236 unsigned char *data, int length);
237 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
238 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
239 __u8 lsr, __u8 data);
240 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
241 __u8 param);
242 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
243 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
244 int baudRate);
245 static void change_port_settings(struct tty_struct *tty,
246 struct edgeport_port *edge_port,
247 struct ktermios *old_termios);
248 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
249 __u8 regNum, __u8 regValue);
250 static int write_cmd_usb(struct edgeport_port *edge_port,
251 unsigned char *buffer, int writeLength);
252 static void send_more_port_data(struct edgeport_serial *edge_serial,
253 struct edgeport_port *edge_port);
254
255 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
256 __u16 length, const __u8 *data);
257 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
258 __u16 length, __u8 *data);
259 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
260 __u16 length, const __u8 *data);
261 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
262 static void get_boot_desc(struct edgeport_serial *edge_serial);
263 static void load_application_firmware(struct edgeport_serial *edge_serial);
264
265 static void unicode_to_ascii(char *string, int buflen,
266 __le16 *unicode, int unicode_size);
267
268
269 /* ************************************************************************ */
270 /* ************************************************************************ */
271 /* ************************************************************************ */
272 /* ************************************************************************ */
273
274 /************************************************************************
275 * *
276 * update_edgeport_E2PROM() Compare current versions of *
277 * Boot ROM and Manufacture *
278 * Descriptors with versions *
279 * embedded in this driver *
280 * *
281 ************************************************************************/
282 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
283 {
284 struct device *dev = &edge_serial->serial->dev->dev;
285 __u32 BootCurVer;
286 __u32 BootNewVer;
287 __u8 BootMajorVersion;
288 __u8 BootMinorVersion;
289 __u16 BootBuildNumber;
290 __u32 Bootaddr;
291 const struct ihex_binrec *rec;
292 const struct firmware *fw;
293 const char *fw_name;
294 int response;
295
296 switch (edge_serial->product_info.iDownloadFile) {
297 case EDGE_DOWNLOAD_FILE_I930:
298 fw_name = "edgeport/boot.fw";
299 break;
300 case EDGE_DOWNLOAD_FILE_80251:
301 fw_name = "edgeport/boot2.fw";
302 break;
303 default:
304 return;
305 }
306
307 response = request_ihex_firmware(&fw, fw_name,
308 &edge_serial->serial->dev->dev);
309 if (response) {
310 dev_err(dev, "Failed to load image \"%s\" err %d\n",
311 fw_name, response);
312 return;
313 }
314
315 rec = (const struct ihex_binrec *)fw->data;
316 BootMajorVersion = rec->data[0];
317 BootMinorVersion = rec->data[1];
318 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
319
320 /* Check Boot Image Version */
321 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
322 (edge_serial->boot_descriptor.MinorVersion << 16) +
323 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
324
325 BootNewVer = (BootMajorVersion << 24) +
326 (BootMinorVersion << 16) +
327 BootBuildNumber;
328
329 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
330 edge_serial->boot_descriptor.MajorVersion,
331 edge_serial->boot_descriptor.MinorVersion,
332 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
333
334
335 if (BootNewVer > BootCurVer) {
336 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
337 edge_serial->boot_descriptor.MajorVersion,
338 edge_serial->boot_descriptor.MinorVersion,
339 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
340 BootMajorVersion, BootMinorVersion, BootBuildNumber);
341
342 dev_dbg(dev, "Downloading new Boot Image\n");
343
344 for (rec = ihex_next_binrec(rec); rec;
345 rec = ihex_next_binrec(rec)) {
346 Bootaddr = be32_to_cpu(rec->addr);
347 response = rom_write(edge_serial->serial,
348 Bootaddr >> 16,
349 Bootaddr & 0xFFFF,
350 be16_to_cpu(rec->len),
351 &rec->data[0]);
352 if (response < 0) {
353 dev_err(&edge_serial->serial->dev->dev,
354 "rom_write failed (%x, %x, %d)\n",
355 Bootaddr >> 16, Bootaddr & 0xFFFF,
356 be16_to_cpu(rec->len));
357 break;
358 }
359 }
360 } else {
361 dev_dbg(dev, "Boot Image -- already up to date\n");
362 }
363 release_firmware(fw);
364 }
365
366 #if 0
367 /************************************************************************
368 *
369 * Get string descriptor from device
370 *
371 ************************************************************************/
372 static int get_string_desc(struct usb_device *dev, int Id,
373 struct usb_string_descriptor **pRetDesc)
374 {
375 struct usb_string_descriptor StringDesc;
376 struct usb_string_descriptor *pStringDesc;
377
378 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
379
380 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
381 sizeof(StringDesc)))
382 return 0;
383
384 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
385 if (!pStringDesc)
386 return -1;
387
388 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
389 StringDesc.bLength)) {
390 kfree(pStringDesc);
391 return -1;
392 }
393
394 *pRetDesc = pStringDesc;
395 return 0;
396 }
397 #endif
398
399 static void dump_product_info(struct edgeport_serial *edge_serial,
400 struct edgeport_product_info *product_info)
401 {
402 struct device *dev = &edge_serial->serial->dev->dev;
403
404 /* Dump Product Info structure */
405 dev_dbg(dev, "**Product Information:\n");
406 dev_dbg(dev, " ProductId %x\n", product_info->ProductId);
407 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts);
408 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer);
409 dev_dbg(dev, " IsServer %d\n", product_info->IsServer);
410 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232);
411 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422);
412 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485);
413 dev_dbg(dev, " RomSize %d\n", product_info->RomSize);
414 dev_dbg(dev, " RamSize %d\n", product_info->RamSize);
415 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev);
416 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev);
417 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n",
418 product_info->BootMajorVersion,
419 product_info->BootMinorVersion,
420 le16_to_cpu(product_info->BootBuildNumber));
421 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n",
422 product_info->FirmwareMajorVersion,
423 product_info->FirmwareMinorVersion,
424 le16_to_cpu(product_info->FirmwareBuildNumber));
425 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n",
426 product_info->ManufactureDescDate[0],
427 product_info->ManufactureDescDate[1],
428 product_info->ManufactureDescDate[2]+1900);
429 dev_dbg(dev, " iDownloadFile 0x%x\n",
430 product_info->iDownloadFile);
431 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer);
432 }
433
434 static void get_product_info(struct edgeport_serial *edge_serial)
435 {
436 struct edgeport_product_info *product_info = &edge_serial->product_info;
437
438 memset(product_info, 0, sizeof(struct edgeport_product_info));
439
440 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
441 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
442 product_info->ProdInfoVer = 0;
443
444 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
445 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
446 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
447 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
448
449 product_info->BootMajorVersion =
450 edge_serial->boot_descriptor.MajorVersion;
451 product_info->BootMinorVersion =
452 edge_serial->boot_descriptor.MinorVersion;
453 product_info->BootBuildNumber =
454 edge_serial->boot_descriptor.BuildNumber;
455
456 memcpy(product_info->ManufactureDescDate,
457 edge_serial->manuf_descriptor.DescDate,
458 sizeof(edge_serial->manuf_descriptor.DescDate));
459
460 /* check if this is 2nd generation hardware */
461 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
462 & ION_DEVICE_ID_80251_NETCHIP)
463 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
464 else
465 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
466
467 /* Determine Product type and set appropriate flags */
468 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
469 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
470 case ION_DEVICE_ID_EDGEPORT_4T:
471 case ION_DEVICE_ID_EDGEPORT_4:
472 case ION_DEVICE_ID_EDGEPORT_2:
473 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
474 case ION_DEVICE_ID_EDGEPORT_8:
475 case ION_DEVICE_ID_EDGEPORT_421:
476 case ION_DEVICE_ID_EDGEPORT_21:
477 case ION_DEVICE_ID_EDGEPORT_2_DIN:
478 case ION_DEVICE_ID_EDGEPORT_4_DIN:
479 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
480 product_info->IsRS232 = 1;
481 break;
482
483 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
484 product_info->IsRS422 = 1;
485 product_info->IsRS485 = 1;
486 break;
487
488 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
489 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
490 product_info->IsRS422 = 1;
491 break;
492 }
493
494 dump_product_info(edge_serial, product_info);
495 }
496
497 static int get_epic_descriptor(struct edgeport_serial *ep)
498 {
499 int result;
500 struct usb_serial *serial = ep->serial;
501 struct edgeport_product_info *product_info = &ep->product_info;
502 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
503 struct edge_compatibility_bits *bits;
504 struct device *dev = &serial->dev->dev;
505
506 ep->is_epic = 0;
507 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
508 USB_REQUEST_ION_GET_EPIC_DESC,
509 0xC0, 0x00, 0x00,
510 &ep->epic_descriptor,
511 sizeof(struct edge_compatibility_descriptor),
512 300);
513
514 if (result > 0) {
515 ep->is_epic = 1;
516 memset(product_info, 0, sizeof(struct edgeport_product_info));
517
518 product_info->NumPorts = epic->NumPorts;
519 product_info->ProdInfoVer = 0;
520 product_info->FirmwareMajorVersion = epic->MajorVersion;
521 product_info->FirmwareMinorVersion = epic->MinorVersion;
522 product_info->FirmwareBuildNumber = epic->BuildNumber;
523 product_info->iDownloadFile = epic->iDownloadFile;
524 product_info->EpicVer = epic->EpicVer;
525 product_info->Epic = epic->Supports;
526 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
527 dump_product_info(ep, product_info);
528
529 bits = &ep->epic_descriptor.Supports;
530 dev_dbg(dev, "**EPIC descriptor:\n");
531 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
532 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE");
533 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE");
534 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE");
535 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
536 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
537 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE");
538 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
539 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
540 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE");
541 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE");
542 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
543 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE");
544 }
545
546 return result;
547 }
548
549
550 /************************************************************************/
551 /************************************************************************/
552 /* U S B C A L L B A C K F U N C T I O N S */
553 /* U S B C A L L B A C K F U N C T I O N S */
554 /************************************************************************/
555 /************************************************************************/
556
557 /*****************************************************************************
558 * edge_interrupt_callback
559 * this is the callback function for when we have received data on the
560 * interrupt endpoint.
561 *****************************************************************************/
562 static void edge_interrupt_callback(struct urb *urb)
563 {
564 struct edgeport_serial *edge_serial = urb->context;
565 struct device *dev;
566 struct edgeport_port *edge_port;
567 struct usb_serial_port *port;
568 struct tty_struct *tty;
569 unsigned char *data = urb->transfer_buffer;
570 int length = urb->actual_length;
571 int bytes_avail;
572 int position;
573 int txCredits;
574 int portNumber;
575 int result;
576 int status = urb->status;
577
578 switch (status) {
579 case 0:
580 /* success */
581 break;
582 case -ECONNRESET:
583 case -ENOENT:
584 case -ESHUTDOWN:
585 /* this urb is terminated, clean up */
586 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
587 return;
588 default:
589 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
590 goto exit;
591 }
592
593 dev = &edge_serial->serial->dev->dev;
594
595 /* process this interrupt-read even if there are no ports open */
596 if (length) {
597 usb_serial_debug_data(dev, __func__, length, data);
598
599 if (length > 1) {
600 bytes_avail = data[0] | (data[1] << 8);
601 if (bytes_avail) {
602 spin_lock(&edge_serial->es_lock);
603 edge_serial->rxBytesAvail += bytes_avail;
604 dev_dbg(dev,
605 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
606 __func__, bytes_avail,
607 edge_serial->rxBytesAvail,
608 edge_serial->read_in_progress);
609
610 if (edge_serial->rxBytesAvail > 0 &&
611 !edge_serial->read_in_progress) {
612 dev_dbg(dev, "%s - posting a read\n", __func__);
613 edge_serial->read_in_progress = true;
614
615 /* we have pending bytes on the
616 bulk in pipe, send a request */
617 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
618 if (result) {
619 dev_err(dev,
620 "%s - usb_submit_urb(read bulk) failed with result = %d\n",
621 __func__, result);
622 edge_serial->read_in_progress = false;
623 }
624 }
625 spin_unlock(&edge_serial->es_lock);
626 }
627 }
628 /* grab the txcredits for the ports if available */
629 position = 2;
630 portNumber = 0;
631 while ((position < length) &&
632 (portNumber < edge_serial->serial->num_ports)) {
633 txCredits = data[position] | (data[position+1] << 8);
634 if (txCredits) {
635 port = edge_serial->serial->port[portNumber];
636 edge_port = usb_get_serial_port_data(port);
637 if (edge_port->open) {
638 spin_lock(&edge_port->ep_lock);
639 edge_port->txCredits += txCredits;
640 spin_unlock(&edge_port->ep_lock);
641 dev_dbg(dev, "%s - txcredits for port%d = %d\n",
642 __func__, portNumber,
643 edge_port->txCredits);
644
645 /* tell the tty driver that something
646 has changed */
647 tty = tty_port_tty_get(
648 &edge_port->port->port);
649 if (tty) {
650 tty_wakeup(tty);
651 tty_kref_put(tty);
652 }
653 /* Since we have more credit, check
654 if more data can be sent */
655 send_more_port_data(edge_serial,
656 edge_port);
657 }
658 }
659 position += 2;
660 ++portNumber;
661 }
662 }
663
664 exit:
665 result = usb_submit_urb(urb, GFP_ATOMIC);
666 if (result)
667 dev_err(&urb->dev->dev,
668 "%s - Error %d submitting control urb\n",
669 __func__, result);
670 }
671
672
673 /*****************************************************************************
674 * edge_bulk_in_callback
675 * this is the callback function for when we have received data on the
676 * bulk in endpoint.
677 *****************************************************************************/
678 static void edge_bulk_in_callback(struct urb *urb)
679 {
680 struct edgeport_serial *edge_serial = urb->context;
681 struct device *dev;
682 unsigned char *data = urb->transfer_buffer;
683 int retval;
684 __u16 raw_data_length;
685 int status = urb->status;
686
687 if (status) {
688 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
689 __func__, status);
690 edge_serial->read_in_progress = false;
691 return;
692 }
693
694 if (urb->actual_length == 0) {
695 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
696 edge_serial->read_in_progress = false;
697 return;
698 }
699
700 dev = &edge_serial->serial->dev->dev;
701 raw_data_length = urb->actual_length;
702
703 usb_serial_debug_data(dev, __func__, raw_data_length, data);
704
705 spin_lock(&edge_serial->es_lock);
706
707 /* decrement our rxBytes available by the number that we just got */
708 edge_serial->rxBytesAvail -= raw_data_length;
709
710 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
711 raw_data_length, edge_serial->rxBytesAvail);
712
713 process_rcvd_data(edge_serial, data, urb->actual_length);
714
715 /* check to see if there's any more data for us to read */
716 if (edge_serial->rxBytesAvail > 0) {
717 dev_dbg(dev, "%s - posting a read\n", __func__);
718 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
719 if (retval) {
720 dev_err(dev,
721 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
722 __func__, retval);
723 edge_serial->read_in_progress = false;
724 }
725 } else {
726 edge_serial->read_in_progress = false;
727 }
728
729 spin_unlock(&edge_serial->es_lock);
730 }
731
732
733 /*****************************************************************************
734 * edge_bulk_out_data_callback
735 * this is the callback function for when we have finished sending
736 * serial data on the bulk out endpoint.
737 *****************************************************************************/
738 static void edge_bulk_out_data_callback(struct urb *urb)
739 {
740 struct edgeport_port *edge_port = urb->context;
741 struct tty_struct *tty;
742 int status = urb->status;
743
744 if (status) {
745 dev_dbg(&urb->dev->dev,
746 "%s - nonzero write bulk status received: %d\n",
747 __func__, status);
748 }
749
750 tty = tty_port_tty_get(&edge_port->port->port);
751
752 if (tty && edge_port->open) {
753 /* let the tty driver wakeup if it has a special
754 write_wakeup function */
755 tty_wakeup(tty);
756 }
757 tty_kref_put(tty);
758
759 /* Release the Write URB */
760 edge_port->write_in_progress = false;
761
762 /* Check if more data needs to be sent */
763 send_more_port_data((struct edgeport_serial *)
764 (usb_get_serial_data(edge_port->port->serial)), edge_port);
765 }
766
767
768 /*****************************************************************************
769 * BulkOutCmdCallback
770 * this is the callback function for when we have finished sending a
771 * command on the bulk out endpoint.
772 *****************************************************************************/
773 static void edge_bulk_out_cmd_callback(struct urb *urb)
774 {
775 struct edgeport_port *edge_port = urb->context;
776 struct tty_struct *tty;
777 int status = urb->status;
778
779 atomic_dec(&CmdUrbs);
780 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
781 __func__, urb, atomic_read(&CmdUrbs));
782
783
784 /* clean up the transfer buffer */
785 kfree(urb->transfer_buffer);
786
787 /* Free the command urb */
788 usb_free_urb(urb);
789
790 if (status) {
791 dev_dbg(&urb->dev->dev,
792 "%s - nonzero write bulk status received: %d\n",
793 __func__, status);
794 return;
795 }
796
797 /* Get pointer to tty */
798 tty = tty_port_tty_get(&edge_port->port->port);
799
800 /* tell the tty driver that something has changed */
801 if (tty && edge_port->open)
802 tty_wakeup(tty);
803 tty_kref_put(tty);
804
805 /* we have completed the command */
806 edge_port->commandPending = false;
807 wake_up(&edge_port->wait_command);
808 }
809
810
811 /*****************************************************************************
812 * Driver tty interface functions
813 *****************************************************************************/
814
815 /*****************************************************************************
816 * SerialOpen
817 * this function is called by the tty driver when a port is opened
818 * If successful, we return 0
819 * Otherwise we return a negative error number.
820 *****************************************************************************/
821 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
822 {
823 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
824 struct device *dev = &port->dev;
825 struct usb_serial *serial;
826 struct edgeport_serial *edge_serial;
827 int response;
828
829 if (edge_port == NULL)
830 return -ENODEV;
831
832 /* see if we've set up our endpoint info yet (can't set it up
833 in edge_startup as the structures were not set up at that time.) */
834 serial = port->serial;
835 edge_serial = usb_get_serial_data(serial);
836 if (edge_serial == NULL)
837 return -ENODEV;
838 if (edge_serial->interrupt_in_buffer == NULL) {
839 struct usb_serial_port *port0 = serial->port[0];
840
841 /* not set up yet, so do it now */
842 edge_serial->interrupt_in_buffer =
843 port0->interrupt_in_buffer;
844 edge_serial->interrupt_in_endpoint =
845 port0->interrupt_in_endpointAddress;
846 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
847 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
848 edge_serial->bulk_in_endpoint =
849 port0->bulk_in_endpointAddress;
850 edge_serial->read_urb = port0->read_urb;
851 edge_serial->bulk_out_endpoint =
852 port0->bulk_out_endpointAddress;
853
854 /* set up our interrupt urb */
855 usb_fill_int_urb(edge_serial->interrupt_read_urb,
856 serial->dev,
857 usb_rcvintpipe(serial->dev,
858 port0->interrupt_in_endpointAddress),
859 port0->interrupt_in_buffer,
860 edge_serial->interrupt_read_urb->transfer_buffer_length,
861 edge_interrupt_callback, edge_serial,
862 edge_serial->interrupt_read_urb->interval);
863
864 /* set up our bulk in urb */
865 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
866 usb_rcvbulkpipe(serial->dev,
867 port0->bulk_in_endpointAddress),
868 port0->bulk_in_buffer,
869 edge_serial->read_urb->transfer_buffer_length,
870 edge_bulk_in_callback, edge_serial);
871 edge_serial->read_in_progress = false;
872
873 /* start interrupt read for this edgeport
874 * this interrupt will continue as long
875 * as the edgeport is connected */
876 response = usb_submit_urb(edge_serial->interrupt_read_urb,
877 GFP_KERNEL);
878 if (response) {
879 dev_err(dev, "%s - Error %d submitting control urb\n",
880 __func__, response);
881 }
882 }
883
884 /* initialize our wait queues */
885 init_waitqueue_head(&edge_port->wait_open);
886 init_waitqueue_head(&edge_port->wait_chase);
887 init_waitqueue_head(&edge_port->delta_msr_wait);
888 init_waitqueue_head(&edge_port->wait_command);
889
890 /* initialize our icount structure */
891 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
892
893 /* initialize our port settings */
894 edge_port->txCredits = 0; /* Can't send any data yet */
895 /* Must always set this bit to enable ints! */
896 edge_port->shadowMCR = MCR_MASTER_IE;
897 edge_port->chaseResponsePending = false;
898
899 /* send a open port command */
900 edge_port->openPending = true;
901 edge_port->open = false;
902 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
903
904 if (response < 0) {
905 dev_err(dev, "%s - error sending open port command\n", __func__);
906 edge_port->openPending = false;
907 return -ENODEV;
908 }
909
910 /* now wait for the port to be completely opened */
911 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
912 OPEN_TIMEOUT);
913
914 if (!edge_port->open) {
915 /* open timed out */
916 dev_dbg(dev, "%s - open timedout\n", __func__);
917 edge_port->openPending = false;
918 return -ENODEV;
919 }
920
921 /* create the txfifo */
922 edge_port->txfifo.head = 0;
923 edge_port->txfifo.tail = 0;
924 edge_port->txfifo.count = 0;
925 edge_port->txfifo.size = edge_port->maxTxCredits;
926 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
927
928 if (!edge_port->txfifo.fifo) {
929 dev_dbg(dev, "%s - no memory\n", __func__);
930 edge_close(port);
931 return -ENOMEM;
932 }
933
934 /* Allocate a URB for the write */
935 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
936 edge_port->write_in_progress = false;
937
938 if (!edge_port->write_urb) {
939 dev_dbg(dev, "%s - no memory\n", __func__);
940 edge_close(port);
941 return -ENOMEM;
942 }
943
944 dev_dbg(dev, "%s(%d) - Initialize TX fifo to %d bytes\n",
945 __func__, port->number, edge_port->maxTxCredits);
946
947 return 0;
948 }
949
950
951 /************************************************************************
952 *
953 * block_until_chase_response
954 *
955 * This function will block the close until one of the following:
956 * 1. Response to our Chase comes from Edgeport
957 * 2. A timeout of 10 seconds without activity has expired
958 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
959 *
960 ************************************************************************/
961 static void block_until_chase_response(struct edgeport_port *edge_port)
962 {
963 struct device *dev = &edge_port->port->dev;
964 DEFINE_WAIT(wait);
965 __u16 lastCredits;
966 int timeout = 1*HZ;
967 int loop = 10;
968
969 while (1) {
970 /* Save Last credits */
971 lastCredits = edge_port->txCredits;
972
973 /* Did we get our Chase response */
974 if (!edge_port->chaseResponsePending) {
975 dev_dbg(dev, "%s - Got Chase Response\n", __func__);
976
977 /* did we get all of our credit back? */
978 if (edge_port->txCredits == edge_port->maxTxCredits) {
979 dev_dbg(dev, "%s - Got all credits\n", __func__);
980 return;
981 }
982 }
983
984 /* Block the thread for a while */
985 prepare_to_wait(&edge_port->wait_chase, &wait,
986 TASK_UNINTERRUPTIBLE);
987 schedule_timeout(timeout);
988 finish_wait(&edge_port->wait_chase, &wait);
989
990 if (lastCredits == edge_port->txCredits) {
991 /* No activity.. count down. */
992 loop--;
993 if (loop == 0) {
994 edge_port->chaseResponsePending = false;
995 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
996 return;
997 }
998 } else {
999 /* Reset timeout value back to 10 seconds */
1000 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
1001 lastCredits, edge_port->txCredits);
1002 loop = 10;
1003 }
1004 }
1005 }
1006
1007
1008 /************************************************************************
1009 *
1010 * block_until_tx_empty
1011 *
1012 * This function will block the close until one of the following:
1013 * 1. TX count are 0
1014 * 2. The edgeport has stopped
1015 * 3. A timeout of 3 seconds without activity has expired
1016 *
1017 ************************************************************************/
1018 static void block_until_tx_empty(struct edgeport_port *edge_port)
1019 {
1020 struct device *dev = &edge_port->port->dev;
1021 DEFINE_WAIT(wait);
1022 struct TxFifo *fifo = &edge_port->txfifo;
1023 __u32 lastCount;
1024 int timeout = HZ/10;
1025 int loop = 30;
1026
1027 while (1) {
1028 /* Save Last count */
1029 lastCount = fifo->count;
1030
1031 /* Is the Edgeport Buffer empty? */
1032 if (lastCount == 0) {
1033 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1034 return;
1035 }
1036
1037 /* Block the thread for a while */
1038 prepare_to_wait(&edge_port->wait_chase, &wait,
1039 TASK_UNINTERRUPTIBLE);
1040 schedule_timeout(timeout);
1041 finish_wait(&edge_port->wait_chase, &wait);
1042
1043 dev_dbg(dev, "%s wait\n", __func__);
1044
1045 if (lastCount == fifo->count) {
1046 /* No activity.. count down. */
1047 loop--;
1048 if (loop == 0) {
1049 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1050 return;
1051 }
1052 } else {
1053 /* Reset timeout value back to seconds */
1054 loop = 30;
1055 }
1056 }
1057 }
1058
1059
1060 /*****************************************************************************
1061 * edge_close
1062 * this function is called by the tty driver when a port is closed
1063 *****************************************************************************/
1064 static void edge_close(struct usb_serial_port *port)
1065 {
1066 struct edgeport_serial *edge_serial;
1067 struct edgeport_port *edge_port;
1068 int status;
1069
1070 edge_serial = usb_get_serial_data(port->serial);
1071 edge_port = usb_get_serial_port_data(port);
1072 if (edge_serial == NULL || edge_port == NULL)
1073 return;
1074
1075 /* block until tx is empty */
1076 block_until_tx_empty(edge_port);
1077
1078 edge_port->closePending = true;
1079
1080 if ((!edge_serial->is_epic) ||
1081 ((edge_serial->is_epic) &&
1082 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1083 /* flush and chase */
1084 edge_port->chaseResponsePending = true;
1085
1086 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1087 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1088 if (status == 0)
1089 /* block until chase finished */
1090 block_until_chase_response(edge_port);
1091 else
1092 edge_port->chaseResponsePending = false;
1093 }
1094
1095 if ((!edge_serial->is_epic) ||
1096 ((edge_serial->is_epic) &&
1097 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1098 /* close the port */
1099 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1100 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1101 }
1102
1103 /* port->close = true; */
1104 edge_port->closePending = false;
1105 edge_port->open = false;
1106 edge_port->openPending = false;
1107
1108 usb_kill_urb(edge_port->write_urb);
1109
1110 if (edge_port->write_urb) {
1111 /* if this urb had a transfer buffer already
1112 (old transfer) free it */
1113 kfree(edge_port->write_urb->transfer_buffer);
1114 usb_free_urb(edge_port->write_urb);
1115 edge_port->write_urb = NULL;
1116 }
1117 kfree(edge_port->txfifo.fifo);
1118 edge_port->txfifo.fifo = NULL;
1119 }
1120
1121 /*****************************************************************************
1122 * SerialWrite
1123 * this function is called by the tty driver when data should be written
1124 * to the port.
1125 * If successful, we return the number of bytes written, otherwise we
1126 * return a negative error number.
1127 *****************************************************************************/
1128 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1129 const unsigned char *data, int count)
1130 {
1131 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1132 struct TxFifo *fifo;
1133 int copySize;
1134 int bytesleft;
1135 int firsthalf;
1136 int secondhalf;
1137 unsigned long flags;
1138
1139 if (edge_port == NULL)
1140 return -ENODEV;
1141
1142 /* get a pointer to the Tx fifo */
1143 fifo = &edge_port->txfifo;
1144
1145 spin_lock_irqsave(&edge_port->ep_lock, flags);
1146
1147 /* calculate number of bytes to put in fifo */
1148 copySize = min((unsigned int)count,
1149 (edge_port->txCredits - fifo->count));
1150
1151 dev_dbg(&port->dev, "%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes\n",
1152 __func__, port->number, count,
1153 edge_port->txCredits - fifo->count, copySize);
1154
1155 /* catch writes of 0 bytes which the tty driver likes to give us,
1156 and when txCredits is empty */
1157 if (copySize == 0) {
1158 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1159 goto finish_write;
1160 }
1161
1162 /* queue the data
1163 * since we can never overflow the buffer we do not have to check for a
1164 * full condition
1165 *
1166 * the copy is done is two parts -- first fill to the end of the buffer
1167 * then copy the reset from the start of the buffer
1168 */
1169 bytesleft = fifo->size - fifo->head;
1170 firsthalf = min(bytesleft, copySize);
1171 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1172 firsthalf, bytesleft);
1173
1174 /* now copy our data */
1175 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1176 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1177
1178 /* update the index and size */
1179 fifo->head += firsthalf;
1180 fifo->count += firsthalf;
1181
1182 /* wrap the index */
1183 if (fifo->head == fifo->size)
1184 fifo->head = 0;
1185
1186 secondhalf = copySize-firsthalf;
1187
1188 if (secondhalf) {
1189 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1190 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1191 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1192 /* update the index and size */
1193 fifo->count += secondhalf;
1194 fifo->head += secondhalf;
1195 /* No need to check for wrap since we can not get to end of
1196 * the fifo in this part
1197 */
1198 }
1199
1200 finish_write:
1201 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1202
1203 send_more_port_data((struct edgeport_serial *)
1204 usb_get_serial_data(port->serial), edge_port);
1205
1206 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1207 __func__, copySize, edge_port->txCredits, fifo->count);
1208
1209 return copySize;
1210 }
1211
1212
1213 /************************************************************************
1214 *
1215 * send_more_port_data()
1216 *
1217 * This routine attempts to write additional UART transmit data
1218 * to a port over the USB bulk pipe. It is called (1) when new
1219 * data has been written to a port's TxBuffer from higher layers
1220 * (2) when the peripheral sends us additional TxCredits indicating
1221 * that it can accept more Tx data for a given port; and (3) when
1222 * a bulk write completes successfully and we want to see if we
1223 * can transmit more.
1224 *
1225 ************************************************************************/
1226 static void send_more_port_data(struct edgeport_serial *edge_serial,
1227 struct edgeport_port *edge_port)
1228 {
1229 struct TxFifo *fifo = &edge_port->txfifo;
1230 struct device *dev = &edge_port->port->dev;
1231 struct urb *urb;
1232 unsigned char *buffer;
1233 int status;
1234 int count;
1235 int bytesleft;
1236 int firsthalf;
1237 int secondhalf;
1238 unsigned long flags;
1239
1240 spin_lock_irqsave(&edge_port->ep_lock, flags);
1241
1242 if (edge_port->write_in_progress ||
1243 !edge_port->open ||
1244 (fifo->count == 0)) {
1245 dev_dbg(dev, "%s(%d) EXIT - fifo %d, PendingWrite = %d\n",
1246 __func__, edge_port->port->number,
1247 fifo->count, edge_port->write_in_progress);
1248 goto exit_send;
1249 }
1250
1251 /* since the amount of data in the fifo will always fit into the
1252 * edgeport buffer we do not need to check the write length
1253 *
1254 * Do we have enough credits for this port to make it worthwhile
1255 * to bother queueing a write. If it's too small, say a few bytes,
1256 * it's better to wait for more credits so we can do a larger write.
1257 */
1258 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1259 dev_dbg(dev, "%s(%d) Not enough credit - fifo %d TxCredit %d\n",
1260 __func__, edge_port->port->number, fifo->count,
1261 edge_port->txCredits);
1262 goto exit_send;
1263 }
1264
1265 /* lock this write */
1266 edge_port->write_in_progress = true;
1267
1268 /* get a pointer to the write_urb */
1269 urb = edge_port->write_urb;
1270
1271 /* make sure transfer buffer is freed */
1272 kfree(urb->transfer_buffer);
1273 urb->transfer_buffer = NULL;
1274
1275 /* build the data header for the buffer and port that we are about
1276 to send out */
1277 count = fifo->count;
1278 buffer = kmalloc(count+2, GFP_ATOMIC);
1279 if (buffer == NULL) {
1280 dev_err_console(edge_port->port,
1281 "%s - no more kernel memory...\n", __func__);
1282 edge_port->write_in_progress = false;
1283 goto exit_send;
1284 }
1285 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1286 - edge_port->port->serial->minor, count);
1287 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1288 - edge_port->port->serial->minor, count);
1289
1290 /* now copy our data */
1291 bytesleft = fifo->size - fifo->tail;
1292 firsthalf = min(bytesleft, count);
1293 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1294 fifo->tail += firsthalf;
1295 fifo->count -= firsthalf;
1296 if (fifo->tail == fifo->size)
1297 fifo->tail = 0;
1298
1299 secondhalf = count-firsthalf;
1300 if (secondhalf) {
1301 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1302 secondhalf);
1303 fifo->tail += secondhalf;
1304 fifo->count -= secondhalf;
1305 }
1306
1307 if (count)
1308 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1309
1310 /* fill up the urb with all of our data and submit it */
1311 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1312 usb_sndbulkpipe(edge_serial->serial->dev,
1313 edge_serial->bulk_out_endpoint),
1314 buffer, count+2,
1315 edge_bulk_out_data_callback, edge_port);
1316
1317 /* decrement the number of credits we have by the number we just sent */
1318 edge_port->txCredits -= count;
1319 edge_port->icount.tx += count;
1320
1321 status = usb_submit_urb(urb, GFP_ATOMIC);
1322 if (status) {
1323 /* something went wrong */
1324 dev_err_console(edge_port->port,
1325 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1326 __func__, status);
1327 edge_port->write_in_progress = false;
1328
1329 /* revert the credits as something bad happened. */
1330 edge_port->txCredits += count;
1331 edge_port->icount.tx -= count;
1332 }
1333 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1334 __func__, count, edge_port->txCredits, fifo->count);
1335
1336 exit_send:
1337 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1338 }
1339
1340
1341 /*****************************************************************************
1342 * edge_write_room
1343 * this function is called by the tty driver when it wants to know how
1344 * many bytes of data we can accept for a specific port. If successful,
1345 * we return the amount of room that we have for this port (the txCredits)
1346 * otherwise we return a negative error number.
1347 *****************************************************************************/
1348 static int edge_write_room(struct tty_struct *tty)
1349 {
1350 struct usb_serial_port *port = tty->driver_data;
1351 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1352 int room;
1353 unsigned long flags;
1354
1355 if (edge_port == NULL)
1356 return 0;
1357 if (edge_port->closePending)
1358 return 0;
1359
1360 if (!edge_port->open) {
1361 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1362 return 0;
1363 }
1364
1365 /* total of both buffers is still txCredit */
1366 spin_lock_irqsave(&edge_port->ep_lock, flags);
1367 room = edge_port->txCredits - edge_port->txfifo.count;
1368 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1369
1370 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1371 return room;
1372 }
1373
1374
1375 /*****************************************************************************
1376 * edge_chars_in_buffer
1377 * this function is called by the tty driver when it wants to know how
1378 * many bytes of data we currently have outstanding in the port (data that
1379 * has been written, but hasn't made it out the port yet)
1380 * If successful, we return the number of bytes left to be written in the
1381 * system,
1382 * Otherwise we return a negative error number.
1383 *****************************************************************************/
1384 static int edge_chars_in_buffer(struct tty_struct *tty)
1385 {
1386 struct usb_serial_port *port = tty->driver_data;
1387 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1388 int num_chars;
1389 unsigned long flags;
1390
1391 if (edge_port == NULL)
1392 return 0;
1393 if (edge_port->closePending)
1394 return 0;
1395
1396 if (!edge_port->open) {
1397 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1398 return 0;
1399 }
1400
1401 spin_lock_irqsave(&edge_port->ep_lock, flags);
1402 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1403 edge_port->txfifo.count;
1404 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1405 if (num_chars) {
1406 dev_dbg(&port->dev, "%s(port %d) - returns %d\n", __func__,
1407 port->number, num_chars);
1408 }
1409
1410 return num_chars;
1411 }
1412
1413
1414 /*****************************************************************************
1415 * SerialThrottle
1416 * this function is called by the tty driver when it wants to stop the data
1417 * being read from the port.
1418 *****************************************************************************/
1419 static void edge_throttle(struct tty_struct *tty)
1420 {
1421 struct usb_serial_port *port = tty->driver_data;
1422 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1423 int status;
1424
1425 if (edge_port == NULL)
1426 return;
1427
1428 if (!edge_port->open) {
1429 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1430 return;
1431 }
1432
1433 /* if we are implementing XON/XOFF, send the stop character */
1434 if (I_IXOFF(tty)) {
1435 unsigned char stop_char = STOP_CHAR(tty);
1436 status = edge_write(tty, port, &stop_char, 1);
1437 if (status <= 0)
1438 return;
1439 }
1440
1441 /* if we are implementing RTS/CTS, toggle that line */
1442 if (tty->termios.c_cflag & CRTSCTS) {
1443 edge_port->shadowMCR &= ~MCR_RTS;
1444 status = send_cmd_write_uart_register(edge_port, MCR,
1445 edge_port->shadowMCR);
1446 if (status != 0)
1447 return;
1448 }
1449 }
1450
1451
1452 /*****************************************************************************
1453 * edge_unthrottle
1454 * this function is called by the tty driver when it wants to resume the
1455 * data being read from the port (called after SerialThrottle is called)
1456 *****************************************************************************/
1457 static void edge_unthrottle(struct tty_struct *tty)
1458 {
1459 struct usb_serial_port *port = tty->driver_data;
1460 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1461 int status;
1462
1463 if (edge_port == NULL)
1464 return;
1465
1466 if (!edge_port->open) {
1467 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1468 return;
1469 }
1470
1471 /* if we are implementing XON/XOFF, send the start character */
1472 if (I_IXOFF(tty)) {
1473 unsigned char start_char = START_CHAR(tty);
1474 status = edge_write(tty, port, &start_char, 1);
1475 if (status <= 0)
1476 return;
1477 }
1478 /* if we are implementing RTS/CTS, toggle that line */
1479 if (tty->termios.c_cflag & CRTSCTS) {
1480 edge_port->shadowMCR |= MCR_RTS;
1481 send_cmd_write_uart_register(edge_port, MCR,
1482 edge_port->shadowMCR);
1483 }
1484 }
1485
1486
1487 /*****************************************************************************
1488 * SerialSetTermios
1489 * this function is called by the tty driver when it wants to change
1490 * the termios structure
1491 *****************************************************************************/
1492 static void edge_set_termios(struct tty_struct *tty,
1493 struct usb_serial_port *port, struct ktermios *old_termios)
1494 {
1495 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1496 unsigned int cflag;
1497
1498 cflag = tty->termios.c_cflag;
1499 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1500 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1501
1502 if (edge_port == NULL)
1503 return;
1504
1505 if (!edge_port->open) {
1506 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1507 return;
1508 }
1509
1510 /* change the port settings to the new ones specified */
1511 change_port_settings(tty, edge_port, old_termios);
1512 }
1513
1514
1515 /*****************************************************************************
1516 * get_lsr_info - get line status register info
1517 *
1518 * Purpose: Let user call ioctl() to get info when the UART physically
1519 * is emptied. On bus types like RS485, the transmitter must
1520 * release the bus after transmitting. This must be done when
1521 * the transmit shift register is empty, not be done when the
1522 * transmit holding register is empty. This functionality
1523 * allows an RS485 driver to be written in user space.
1524 *****************************************************************************/
1525 static int get_lsr_info(struct edgeport_port *edge_port,
1526 unsigned int __user *value)
1527 {
1528 unsigned int result = 0;
1529 unsigned long flags;
1530
1531 spin_lock_irqsave(&edge_port->ep_lock, flags);
1532 if (edge_port->maxTxCredits == edge_port->txCredits &&
1533 edge_port->txfifo.count == 0) {
1534 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1535 result = TIOCSER_TEMT;
1536 }
1537 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1538
1539 if (copy_to_user(value, &result, sizeof(int)))
1540 return -EFAULT;
1541 return 0;
1542 }
1543
1544 static int edge_tiocmset(struct tty_struct *tty,
1545 unsigned int set, unsigned int clear)
1546 {
1547 struct usb_serial_port *port = tty->driver_data;
1548 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1549 unsigned int mcr;
1550
1551 mcr = edge_port->shadowMCR;
1552 if (set & TIOCM_RTS)
1553 mcr |= MCR_RTS;
1554 if (set & TIOCM_DTR)
1555 mcr |= MCR_DTR;
1556 if (set & TIOCM_LOOP)
1557 mcr |= MCR_LOOPBACK;
1558
1559 if (clear & TIOCM_RTS)
1560 mcr &= ~MCR_RTS;
1561 if (clear & TIOCM_DTR)
1562 mcr &= ~MCR_DTR;
1563 if (clear & TIOCM_LOOP)
1564 mcr &= ~MCR_LOOPBACK;
1565
1566 edge_port->shadowMCR = mcr;
1567
1568 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1569
1570 return 0;
1571 }
1572
1573 static int edge_tiocmget(struct tty_struct *tty)
1574 {
1575 struct usb_serial_port *port = tty->driver_data;
1576 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1577 unsigned int result = 0;
1578 unsigned int msr;
1579 unsigned int mcr;
1580
1581 msr = edge_port->shadowMSR;
1582 mcr = edge_port->shadowMCR;
1583 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1584 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1585 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1586 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1587 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1588 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1589
1590 return result;
1591 }
1592
1593 static int edge_get_icount(struct tty_struct *tty,
1594 struct serial_icounter_struct *icount)
1595 {
1596 struct usb_serial_port *port = tty->driver_data;
1597 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1598 struct async_icount cnow;
1599 cnow = edge_port->icount;
1600
1601 icount->cts = cnow.cts;
1602 icount->dsr = cnow.dsr;
1603 icount->rng = cnow.rng;
1604 icount->dcd = cnow.dcd;
1605 icount->rx = cnow.rx;
1606 icount->tx = cnow.tx;
1607 icount->frame = cnow.frame;
1608 icount->overrun = cnow.overrun;
1609 icount->parity = cnow.parity;
1610 icount->brk = cnow.brk;
1611 icount->buf_overrun = cnow.buf_overrun;
1612
1613 dev_dbg(&port->dev, "%s (%d) TIOCGICOUNT RX=%d, TX=%d\n", __func__,
1614 port->number, icount->rx, icount->tx);
1615 return 0;
1616 }
1617
1618 static int get_serial_info(struct edgeport_port *edge_port,
1619 struct serial_struct __user *retinfo)
1620 {
1621 struct serial_struct tmp;
1622
1623 if (!retinfo)
1624 return -EFAULT;
1625
1626 memset(&tmp, 0, sizeof(tmp));
1627
1628 tmp.type = PORT_16550A;
1629 tmp.line = edge_port->port->serial->minor;
1630 tmp.port = edge_port->port->number;
1631 tmp.irq = 0;
1632 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1633 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1634 tmp.baud_base = 9600;
1635 tmp.close_delay = 5*HZ;
1636 tmp.closing_wait = 30*HZ;
1637
1638 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1639 return -EFAULT;
1640 return 0;
1641 }
1642
1643
1644 /*****************************************************************************
1645 * SerialIoctl
1646 * this function handles any ioctl calls to the driver
1647 *****************************************************************************/
1648 static int edge_ioctl(struct tty_struct *tty,
1649 unsigned int cmd, unsigned long arg)
1650 {
1651 struct usb_serial_port *port = tty->driver_data;
1652 DEFINE_WAIT(wait);
1653 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1654 struct async_icount cnow;
1655 struct async_icount cprev;
1656
1657 dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
1658
1659 switch (cmd) {
1660 case TIOCSERGETLSR:
1661 dev_dbg(&port->dev, "%s (%d) TIOCSERGETLSR\n", __func__, port->number);
1662 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1663
1664 case TIOCGSERIAL:
1665 dev_dbg(&port->dev, "%s (%d) TIOCGSERIAL\n", __func__, port->number);
1666 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1667
1668 case TIOCMIWAIT:
1669 dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__, port->number);
1670 cprev = edge_port->icount;
1671 while (1) {
1672 prepare_to_wait(&edge_port->delta_msr_wait,
1673 &wait, TASK_INTERRUPTIBLE);
1674 schedule();
1675 finish_wait(&edge_port->delta_msr_wait, &wait);
1676 /* see if a signal did it */
1677 if (signal_pending(current))
1678 return -ERESTARTSYS;
1679 cnow = edge_port->icount;
1680 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1681 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1682 return -EIO; /* no change => error */
1683 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1684 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1685 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1686 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1687 return 0;
1688 }
1689 cprev = cnow;
1690 }
1691 /* NOTREACHED */
1692 break;
1693
1694 }
1695 return -ENOIOCTLCMD;
1696 }
1697
1698
1699 /*****************************************************************************
1700 * SerialBreak
1701 * this function sends a break to the port
1702 *****************************************************************************/
1703 static void edge_break(struct tty_struct *tty, int break_state)
1704 {
1705 struct usb_serial_port *port = tty->driver_data;
1706 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1707 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1708 int status;
1709
1710 if ((!edge_serial->is_epic) ||
1711 ((edge_serial->is_epic) &&
1712 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1713 /* flush and chase */
1714 edge_port->chaseResponsePending = true;
1715
1716 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1717 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1718 if (status == 0) {
1719 /* block until chase finished */
1720 block_until_chase_response(edge_port);
1721 } else {
1722 edge_port->chaseResponsePending = false;
1723 }
1724 }
1725
1726 if ((!edge_serial->is_epic) ||
1727 ((edge_serial->is_epic) &&
1728 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1729 if (break_state == -1) {
1730 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1731 status = send_iosp_ext_cmd(edge_port,
1732 IOSP_CMD_SET_BREAK, 0);
1733 } else {
1734 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1735 status = send_iosp_ext_cmd(edge_port,
1736 IOSP_CMD_CLEAR_BREAK, 0);
1737 }
1738 if (status)
1739 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1740 __func__);
1741 }
1742 }
1743
1744
1745 /*****************************************************************************
1746 * process_rcvd_data
1747 * this function handles the data received on the bulk in pipe.
1748 *****************************************************************************/
1749 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1750 unsigned char *buffer, __u16 bufferLength)
1751 {
1752 struct device *dev = &edge_serial->serial->dev->dev;
1753 struct usb_serial_port *port;
1754 struct edgeport_port *edge_port;
1755 struct tty_struct *tty;
1756 __u16 lastBufferLength;
1757 __u16 rxLen;
1758
1759 lastBufferLength = bufferLength + 1;
1760
1761 while (bufferLength > 0) {
1762 /* failsafe incase we get a message that we don't understand */
1763 if (lastBufferLength == bufferLength) {
1764 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1765 break;
1766 }
1767 lastBufferLength = bufferLength;
1768
1769 switch (edge_serial->rxState) {
1770 case EXPECT_HDR1:
1771 edge_serial->rxHeader1 = *buffer;
1772 ++buffer;
1773 --bufferLength;
1774
1775 if (bufferLength == 0) {
1776 edge_serial->rxState = EXPECT_HDR2;
1777 break;
1778 }
1779 /* otherwise, drop on through */
1780 case EXPECT_HDR2:
1781 edge_serial->rxHeader2 = *buffer;
1782 ++buffer;
1783 --bufferLength;
1784
1785 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1786 edge_serial->rxHeader1, edge_serial->rxHeader2);
1787 /* Process depending on whether this header is
1788 * data or status */
1789
1790 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1791 /* Decode this status header and go to
1792 * EXPECT_HDR1 (if we can process the status
1793 * with only 2 bytes), or go to EXPECT_HDR3 to
1794 * get the third byte. */
1795 edge_serial->rxPort =
1796 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1797 edge_serial->rxStatusCode =
1798 IOSP_GET_STATUS_CODE(
1799 edge_serial->rxHeader1);
1800
1801 if (!IOSP_STATUS_IS_2BYTE(
1802 edge_serial->rxStatusCode)) {
1803 /* This status needs additional bytes.
1804 * Save what we have and then wait for
1805 * more data.
1806 */
1807 edge_serial->rxStatusParam
1808 = edge_serial->rxHeader2;
1809 edge_serial->rxState = EXPECT_HDR3;
1810 break;
1811 }
1812 /* We have all the header bytes, process the
1813 status now */
1814 process_rcvd_status(edge_serial,
1815 edge_serial->rxHeader2, 0);
1816 edge_serial->rxState = EXPECT_HDR1;
1817 break;
1818 } else {
1819 edge_serial->rxPort =
1820 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1821 edge_serial->rxBytesRemaining =
1822 IOSP_GET_HDR_DATA_LEN(
1823 edge_serial->rxHeader1,
1824 edge_serial->rxHeader2);
1825 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1826 __func__,
1827 edge_serial->rxPort,
1828 edge_serial->rxBytesRemaining);
1829
1830 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1831 * ASSERT(DevExt->RxBytesRemaining <
1832 * IOSP_MAX_DATA_LENGTH);
1833 */
1834
1835 if (bufferLength == 0) {
1836 edge_serial->rxState = EXPECT_DATA;
1837 break;
1838 }
1839 /* Else, drop through */
1840 }
1841 case EXPECT_DATA: /* Expect data */
1842 if (bufferLength < edge_serial->rxBytesRemaining) {
1843 rxLen = bufferLength;
1844 /* Expect data to start next buffer */
1845 edge_serial->rxState = EXPECT_DATA;
1846 } else {
1847 /* BufLen >= RxBytesRemaining */
1848 rxLen = edge_serial->rxBytesRemaining;
1849 /* Start another header next time */
1850 edge_serial->rxState = EXPECT_HDR1;
1851 }
1852
1853 bufferLength -= rxLen;
1854 edge_serial->rxBytesRemaining -= rxLen;
1855
1856 /* spit this data back into the tty driver if this
1857 port is open */
1858 if (rxLen) {
1859 port = edge_serial->serial->port[
1860 edge_serial->rxPort];
1861 edge_port = usb_get_serial_port_data(port);
1862 if (edge_port->open) {
1863 tty = tty_port_tty_get(
1864 &edge_port->port->port);
1865 if (tty) {
1866 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1867 __func__, rxLen, edge_serial->rxPort);
1868 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1869 tty_kref_put(tty);
1870 }
1871 edge_port->icount.rx += rxLen;
1872 }
1873 buffer += rxLen;
1874 }
1875 break;
1876
1877 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1878 edge_serial->rxHeader3 = *buffer;
1879 ++buffer;
1880 --bufferLength;
1881
1882 /* We have all the header bytes, process the
1883 status now */
1884 process_rcvd_status(edge_serial,
1885 edge_serial->rxStatusParam,
1886 edge_serial->rxHeader3);
1887 edge_serial->rxState = EXPECT_HDR1;
1888 break;
1889 }
1890 }
1891 }
1892
1893
1894 /*****************************************************************************
1895 * process_rcvd_status
1896 * this function handles the any status messages received on the
1897 * bulk in pipe.
1898 *****************************************************************************/
1899 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1900 __u8 byte2, __u8 byte3)
1901 {
1902 struct usb_serial_port *port;
1903 struct edgeport_port *edge_port;
1904 struct tty_struct *tty;
1905 struct device *dev;
1906 __u8 code = edge_serial->rxStatusCode;
1907
1908 /* switch the port pointer to the one being currently talked about */
1909 port = edge_serial->serial->port[edge_serial->rxPort];
1910 edge_port = usb_get_serial_port_data(port);
1911 if (edge_port == NULL) {
1912 dev_err(&edge_serial->serial->dev->dev,
1913 "%s - edge_port == NULL for port %d\n",
1914 __func__, edge_serial->rxPort);
1915 return;
1916 }
1917 dev = &port->dev;
1918
1919 if (code == IOSP_EXT_STATUS) {
1920 switch (byte2) {
1921 case IOSP_EXT_STATUS_CHASE_RSP:
1922 /* we want to do EXT status regardless of port
1923 * open/closed */
1924 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1925 __func__, edge_serial->rxPort, byte3);
1926 /* Currently, the only EXT_STATUS is Chase, so process
1927 * here instead of one more call to one more subroutine
1928 * If/when more EXT_STATUS, there'll be more work to do
1929 * Also, we currently clear flag and close the port
1930 * regardless of content of above's Byte3.
1931 * We could choose to do something else when Byte3 says
1932 * Timeout on Chase from Edgeport, like wait longer in
1933 * block_until_chase_response, but for now we don't.
1934 */
1935 edge_port->chaseResponsePending = false;
1936 wake_up(&edge_port->wait_chase);
1937 return;
1938
1939 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1940 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1941 __func__, edge_serial->rxPort, byte3);
1942 /* Port->RxCheckRsp = true; */
1943 return;
1944 }
1945 }
1946
1947 if (code == IOSP_STATUS_OPEN_RSP) {
1948 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1949 edge_port->maxTxCredits = edge_port->txCredits;
1950 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1951 __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1952 handle_new_msr(edge_port, byte2);
1953
1954 /* send the current line settings to the port so we are
1955 in sync with any further termios calls */
1956 tty = tty_port_tty_get(&edge_port->port->port);
1957 if (tty) {
1958 change_port_settings(tty,
1959 edge_port, &tty->termios);
1960 tty_kref_put(tty);
1961 }
1962
1963 /* we have completed the open */
1964 edge_port->openPending = false;
1965 edge_port->open = true;
1966 wake_up(&edge_port->wait_open);
1967 return;
1968 }
1969
1970 /* If port is closed, silently discard all rcvd status. We can
1971 * have cases where buffered status is received AFTER the close
1972 * port command is sent to the Edgeport.
1973 */
1974 if (!edge_port->open || edge_port->closePending)
1975 return;
1976
1977 switch (code) {
1978 /* Not currently sent by Edgeport */
1979 case IOSP_STATUS_LSR:
1980 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1981 __func__, edge_serial->rxPort, byte2);
1982 handle_new_lsr(edge_port, false, byte2, 0);
1983 break;
1984
1985 case IOSP_STATUS_LSR_DATA:
1986 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1987 __func__, edge_serial->rxPort, byte2, byte3);
1988 /* byte2 is LSR Register */
1989 /* byte3 is broken data byte */
1990 handle_new_lsr(edge_port, true, byte2, byte3);
1991 break;
1992 /*
1993 * case IOSP_EXT_4_STATUS:
1994 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1995 * __func__, edge_serial->rxPort, byte2, byte3);
1996 * break;
1997 */
1998 case IOSP_STATUS_MSR:
1999 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
2000 __func__, edge_serial->rxPort, byte2);
2001 /*
2002 * Process this new modem status and generate appropriate
2003 * events, etc, based on the new status. This routine
2004 * also saves the MSR in Port->ShadowMsr.
2005 */
2006 handle_new_msr(edge_port, byte2);
2007 break;
2008
2009 default:
2010 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
2011 break;
2012 }
2013 }
2014
2015
2016 /*****************************************************************************
2017 * edge_tty_recv
2018 * this function passes data on to the tty flip buffer
2019 *****************************************************************************/
2020 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2021 unsigned char *data, int length)
2022 {
2023 int cnt;
2024
2025 cnt = tty_insert_flip_string(tty, data, length);
2026 if (cnt < length) {
2027 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2028 __func__, length - cnt);
2029 }
2030 data += cnt;
2031 length -= cnt;
2032
2033 tty_flip_buffer_push(tty);
2034 }
2035
2036
2037 /*****************************************************************************
2038 * handle_new_msr
2039 * this function handles any change to the msr register for a port.
2040 *****************************************************************************/
2041 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2042 {
2043 struct async_icount *icount;
2044
2045 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2046 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2047 icount = &edge_port->icount;
2048
2049 /* update input line counters */
2050 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2051 icount->cts++;
2052 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2053 icount->dsr++;
2054 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2055 icount->dcd++;
2056 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2057 icount->rng++;
2058 wake_up_interruptible(&edge_port->delta_msr_wait);
2059 }
2060
2061 /* Save the new modem status */
2062 edge_port->shadowMSR = newMsr & 0xf0;
2063 }
2064
2065
2066 /*****************************************************************************
2067 * handle_new_lsr
2068 * this function handles any change to the lsr register for a port.
2069 *****************************************************************************/
2070 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2071 __u8 lsr, __u8 data)
2072 {
2073 __u8 newLsr = (__u8) (lsr & (__u8)
2074 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2075 struct async_icount *icount;
2076
2077 edge_port->shadowLSR = lsr;
2078
2079 if (newLsr & LSR_BREAK) {
2080 /*
2081 * Parity and Framing errors only count if they
2082 * occur exclusive of a break being
2083 * received.
2084 */
2085 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2086 }
2087
2088 /* Place LSR data byte into Rx buffer */
2089 if (lsrData) {
2090 struct tty_struct *tty =
2091 tty_port_tty_get(&edge_port->port->port);
2092 if (tty) {
2093 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2094 tty_kref_put(tty);
2095 }
2096 }
2097 /* update input line counters */
2098 icount = &edge_port->icount;
2099 if (newLsr & LSR_BREAK)
2100 icount->brk++;
2101 if (newLsr & LSR_OVER_ERR)
2102 icount->overrun++;
2103 if (newLsr & LSR_PAR_ERR)
2104 icount->parity++;
2105 if (newLsr & LSR_FRM_ERR)
2106 icount->frame++;
2107 }
2108
2109
2110 /****************************************************************************
2111 * sram_write
2112 * writes a number of bytes to the Edgeport device's sram starting at the
2113 * given address.
2114 * If successful returns the number of bytes written, otherwise it returns
2115 * a negative error number of the problem.
2116 ****************************************************************************/
2117 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2118 __u16 length, const __u8 *data)
2119 {
2120 int result;
2121 __u16 current_length;
2122 unsigned char *transfer_buffer;
2123
2124 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2125
2126 transfer_buffer = kmalloc(64, GFP_KERNEL);
2127 if (!transfer_buffer) {
2128 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2129 __func__, 64);
2130 return -ENOMEM;
2131 }
2132
2133 /* need to split these writes up into 64 byte chunks */
2134 result = 0;
2135 while (length > 0) {
2136 if (length > 64)
2137 current_length = 64;
2138 else
2139 current_length = length;
2140
2141 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2142 memcpy(transfer_buffer, data, current_length);
2143 result = usb_control_msg(serial->dev,
2144 usb_sndctrlpipe(serial->dev, 0),
2145 USB_REQUEST_ION_WRITE_RAM,
2146 0x40, addr, extAddr, transfer_buffer,
2147 current_length, 300);
2148 if (result < 0)
2149 break;
2150 length -= current_length;
2151 addr += current_length;
2152 data += current_length;
2153 }
2154
2155 kfree(transfer_buffer);
2156 return result;
2157 }
2158
2159
2160 /****************************************************************************
2161 * rom_write
2162 * writes a number of bytes to the Edgeport device's ROM starting at the
2163 * given address.
2164 * If successful returns the number of bytes written, otherwise it returns
2165 * a negative error number of the problem.
2166 ****************************************************************************/
2167 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2168 __u16 length, const __u8 *data)
2169 {
2170 int result;
2171 __u16 current_length;
2172 unsigned char *transfer_buffer;
2173
2174 transfer_buffer = kmalloc(64, GFP_KERNEL);
2175 if (!transfer_buffer) {
2176 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2177 __func__, 64);
2178 return -ENOMEM;
2179 }
2180
2181 /* need to split these writes up into 64 byte chunks */
2182 result = 0;
2183 while (length > 0) {
2184 if (length > 64)
2185 current_length = 64;
2186 else
2187 current_length = length;
2188 memcpy(transfer_buffer, data, current_length);
2189 result = usb_control_msg(serial->dev,
2190 usb_sndctrlpipe(serial->dev, 0),
2191 USB_REQUEST_ION_WRITE_ROM, 0x40,
2192 addr, extAddr,
2193 transfer_buffer, current_length, 300);
2194 if (result < 0)
2195 break;
2196 length -= current_length;
2197 addr += current_length;
2198 data += current_length;
2199 }
2200
2201 kfree(transfer_buffer);
2202 return result;
2203 }
2204
2205
2206 /****************************************************************************
2207 * rom_read
2208 * reads a number of bytes from the Edgeport device starting at the given
2209 * address.
2210 * If successful returns the number of bytes read, otherwise it returns
2211 * a negative error number of the problem.
2212 ****************************************************************************/
2213 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2214 __u16 addr, __u16 length, __u8 *data)
2215 {
2216 int result;
2217 __u16 current_length;
2218 unsigned char *transfer_buffer;
2219
2220 transfer_buffer = kmalloc(64, GFP_KERNEL);
2221 if (!transfer_buffer) {
2222 dev_err(&serial->dev->dev,
2223 "%s - kmalloc(%d) failed.\n", __func__, 64);
2224 return -ENOMEM;
2225 }
2226
2227 /* need to split these reads up into 64 byte chunks */
2228 result = 0;
2229 while (length > 0) {
2230 if (length > 64)
2231 current_length = 64;
2232 else
2233 current_length = length;
2234 result = usb_control_msg(serial->dev,
2235 usb_rcvctrlpipe(serial->dev, 0),
2236 USB_REQUEST_ION_READ_ROM,
2237 0xC0, addr, extAddr, transfer_buffer,
2238 current_length, 300);
2239 if (result < 0)
2240 break;
2241 memcpy(data, transfer_buffer, current_length);
2242 length -= current_length;
2243 addr += current_length;
2244 data += current_length;
2245 }
2246
2247 kfree(transfer_buffer);
2248 return result;
2249 }
2250
2251
2252 /****************************************************************************
2253 * send_iosp_ext_cmd
2254 * Is used to send a IOSP message to the Edgeport device
2255 ****************************************************************************/
2256 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2257 __u8 command, __u8 param)
2258 {
2259 unsigned char *buffer;
2260 unsigned char *currentCommand;
2261 int length = 0;
2262 int status = 0;
2263
2264 buffer = kmalloc(10, GFP_ATOMIC);
2265 if (!buffer) {
2266 dev_err(&edge_port->port->dev,
2267 "%s - kmalloc(%d) failed.\n", __func__, 10);
2268 return -ENOMEM;
2269 }
2270
2271 currentCommand = buffer;
2272
2273 MAKE_CMD_EXT_CMD(&currentCommand, &length,
2274 edge_port->port->number - edge_port->port->serial->minor,
2275 command, param);
2276
2277 status = write_cmd_usb(edge_port, buffer, length);
2278 if (status) {
2279 /* something bad happened, let's free up the memory */
2280 kfree(buffer);
2281 }
2282
2283 return status;
2284 }
2285
2286
2287 /*****************************************************************************
2288 * write_cmd_usb
2289 * this function writes the given buffer out to the bulk write endpoint.
2290 *****************************************************************************/
2291 static int write_cmd_usb(struct edgeport_port *edge_port,
2292 unsigned char *buffer, int length)
2293 {
2294 struct edgeport_serial *edge_serial =
2295 usb_get_serial_data(edge_port->port->serial);
2296 struct device *dev = &edge_port->port->dev;
2297 int status = 0;
2298 struct urb *urb;
2299
2300 usb_serial_debug_data(dev, __func__, length, buffer);
2301
2302 /* Allocate our next urb */
2303 urb = usb_alloc_urb(0, GFP_ATOMIC);
2304 if (!urb)
2305 return -ENOMEM;
2306
2307 atomic_inc(&CmdUrbs);
2308 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2309 __func__, urb, atomic_read(&CmdUrbs));
2310
2311 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2312 usb_sndbulkpipe(edge_serial->serial->dev,
2313 edge_serial->bulk_out_endpoint),
2314 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2315
2316 edge_port->commandPending = true;
2317 status = usb_submit_urb(urb, GFP_ATOMIC);
2318
2319 if (status) {
2320 /* something went wrong */
2321 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2322 __func__, status);
2323 usb_kill_urb(urb);
2324 usb_free_urb(urb);
2325 atomic_dec(&CmdUrbs);
2326 return status;
2327 }
2328
2329 #if 0
2330 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2331
2332 if (edge_port->commandPending) {
2333 /* command timed out */
2334 dev_dbg(dev, "%s - command timed out\n", __func__);
2335 status = -EINVAL;
2336 }
2337 #endif
2338 return status;
2339 }
2340
2341
2342 /*****************************************************************************
2343 * send_cmd_write_baud_rate
2344 * this function sends the proper command to change the baud rate of the
2345 * specified port.
2346 *****************************************************************************/
2347 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2348 int baudRate)
2349 {
2350 struct edgeport_serial *edge_serial =
2351 usb_get_serial_data(edge_port->port->serial);
2352 struct device *dev = &edge_port->port->dev;
2353 unsigned char *cmdBuffer;
2354 unsigned char *currCmd;
2355 int cmdLen = 0;
2356 int divisor;
2357 int status;
2358 unsigned char number =
2359 edge_port->port->number - edge_port->port->serial->minor;
2360
2361 if (edge_serial->is_epic &&
2362 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2363 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d\n",
2364 edge_port->port->number, baudRate);
2365 return 0;
2366 }
2367
2368 dev_dbg(dev, "%s - port = %d, baud = %d\n", __func__,
2369 edge_port->port->number, baudRate);
2370
2371 status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2372 if (status) {
2373 dev_err(dev, "%s - bad baud rate\n", __func__);
2374 return status;
2375 }
2376
2377 /* Alloc memory for the string of commands. */
2378 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2379 if (!cmdBuffer) {
2380 dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2381 return -ENOMEM;
2382 }
2383 currCmd = cmdBuffer;
2384
2385 /* Enable access to divisor latch */
2386 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2387
2388 /* Write the divisor itself */
2389 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2390 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2391
2392 /* Restore original value to disable access to divisor latch */
2393 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2394 edge_port->shadowLCR);
2395
2396 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2397 if (status) {
2398 /* something bad happened, let's free up the memory */
2399 kfree(cmdBuffer);
2400 }
2401
2402 return status;
2403 }
2404
2405
2406 /*****************************************************************************
2407 * calc_baud_rate_divisor
2408 * this function calculates the proper baud rate divisor for the specified
2409 * baud rate.
2410 *****************************************************************************/
2411 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2412 {
2413 int i;
2414 __u16 custom;
2415
2416 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2417 if (divisor_table[i].BaudRate == baudrate) {
2418 *divisor = divisor_table[i].Divisor;
2419 return 0;
2420 }
2421 }
2422
2423 /* We have tried all of the standard baud rates
2424 * lets try to calculate the divisor for this baud rate
2425 * Make sure the baud rate is reasonable */
2426 if (baudrate > 50 && baudrate < 230400) {
2427 /* get divisor */
2428 custom = (__u16)((230400L + baudrate/2) / baudrate);
2429
2430 *divisor = custom;
2431
2432 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2433 return 0;
2434 }
2435
2436 return -1;
2437 }
2438
2439
2440 /*****************************************************************************
2441 * send_cmd_write_uart_register
2442 * this function builds up a uart register message and sends to the device.
2443 *****************************************************************************/
2444 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2445 __u8 regNum, __u8 regValue)
2446 {
2447 struct edgeport_serial *edge_serial =
2448 usb_get_serial_data(edge_port->port->serial);
2449 struct device *dev = &edge_port->port->dev;
2450 unsigned char *cmdBuffer;
2451 unsigned char *currCmd;
2452 unsigned long cmdLen = 0;
2453 int status;
2454
2455 dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2456 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2457
2458 if (edge_serial->is_epic &&
2459 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2460 regNum == MCR) {
2461 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2462 return 0;
2463 }
2464
2465 if (edge_serial->is_epic &&
2466 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2467 regNum == LCR) {
2468 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2469 return 0;
2470 }
2471
2472 /* Alloc memory for the string of commands. */
2473 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2474 if (cmdBuffer == NULL)
2475 return -ENOMEM;
2476
2477 currCmd = cmdBuffer;
2478
2479 /* Build a cmd in the buffer to write the given register */
2480 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2481 edge_port->port->number - edge_port->port->serial->minor,
2482 regNum, regValue);
2483
2484 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2485 if (status) {
2486 /* something bad happened, let's free up the memory */
2487 kfree(cmdBuffer);
2488 }
2489
2490 return status;
2491 }
2492
2493
2494 /*****************************************************************************
2495 * change_port_settings
2496 * This routine is called to set the UART on the device to match the
2497 * specified new settings.
2498 *****************************************************************************/
2499
2500 static void change_port_settings(struct tty_struct *tty,
2501 struct edgeport_port *edge_port, struct ktermios *old_termios)
2502 {
2503 struct device *dev = &edge_port->port->dev;
2504 struct edgeport_serial *edge_serial =
2505 usb_get_serial_data(edge_port->port->serial);
2506 int baud;
2507 unsigned cflag;
2508 __u8 mask = 0xff;
2509 __u8 lData;
2510 __u8 lParity;
2511 __u8 lStop;
2512 __u8 rxFlow;
2513 __u8 txFlow;
2514 int status;
2515
2516 dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
2517
2518 if (!edge_port->open &&
2519 !edge_port->openPending) {
2520 dev_dbg(dev, "%s - port not opened\n", __func__);
2521 return;
2522 }
2523
2524 cflag = tty->termios.c_cflag;
2525
2526 switch (cflag & CSIZE) {
2527 case CS5:
2528 lData = LCR_BITS_5; mask = 0x1f;
2529 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2530 break;
2531 case CS6:
2532 lData = LCR_BITS_6; mask = 0x3f;
2533 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2534 break;
2535 case CS7:
2536 lData = LCR_BITS_7; mask = 0x7f;
2537 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2538 break;
2539 default:
2540 case CS8:
2541 lData = LCR_BITS_8;
2542 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2543 break;
2544 }
2545
2546 lParity = LCR_PAR_NONE;
2547 if (cflag & PARENB) {
2548 if (cflag & CMSPAR) {
2549 if (cflag & PARODD) {
2550 lParity = LCR_PAR_MARK;
2551 dev_dbg(dev, "%s - parity = mark\n", __func__);
2552 } else {
2553 lParity = LCR_PAR_SPACE;
2554 dev_dbg(dev, "%s - parity = space\n", __func__);
2555 }
2556 } else if (cflag & PARODD) {
2557 lParity = LCR_PAR_ODD;
2558 dev_dbg(dev, "%s - parity = odd\n", __func__);
2559 } else {
2560 lParity = LCR_PAR_EVEN;
2561 dev_dbg(dev, "%s - parity = even\n", __func__);
2562 }
2563 } else {
2564 dev_dbg(dev, "%s - parity = none\n", __func__);
2565 }
2566
2567 if (cflag & CSTOPB) {
2568 lStop = LCR_STOP_2;
2569 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2570 } else {
2571 lStop = LCR_STOP_1;
2572 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2573 }
2574
2575 /* figure out the flow control settings */
2576 rxFlow = txFlow = 0x00;
2577 if (cflag & CRTSCTS) {
2578 rxFlow |= IOSP_RX_FLOW_RTS;
2579 txFlow |= IOSP_TX_FLOW_CTS;
2580 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2581 } else {
2582 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2583 }
2584
2585 /* if we are implementing XON/XOFF, set the start and stop character
2586 in the device */
2587 if (I_IXOFF(tty) || I_IXON(tty)) {
2588 unsigned char stop_char = STOP_CHAR(tty);
2589 unsigned char start_char = START_CHAR(tty);
2590
2591 if ((!edge_serial->is_epic) ||
2592 ((edge_serial->is_epic) &&
2593 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2594 send_iosp_ext_cmd(edge_port,
2595 IOSP_CMD_SET_XON_CHAR, start_char);
2596 send_iosp_ext_cmd(edge_port,
2597 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2598 }
2599
2600 /* if we are implementing INBOUND XON/XOFF */
2601 if (I_IXOFF(tty)) {
2602 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2603 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2604 __func__, start_char, stop_char);
2605 } else {
2606 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2607 }
2608
2609 /* if we are implementing OUTBOUND XON/XOFF */
2610 if (I_IXON(tty)) {
2611 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2612 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2613 __func__, start_char, stop_char);
2614 } else {
2615 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2616 }
2617 }
2618
2619 /* Set flow control to the configured value */
2620 if ((!edge_serial->is_epic) ||
2621 ((edge_serial->is_epic) &&
2622 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2623 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2624 if ((!edge_serial->is_epic) ||
2625 ((edge_serial->is_epic) &&
2626 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2627 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2628
2629
2630 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2631 edge_port->shadowLCR |= (lData | lParity | lStop);
2632
2633 edge_port->validDataMask = mask;
2634
2635 /* Send the updated LCR value to the EdgePort */
2636 status = send_cmd_write_uart_register(edge_port, LCR,
2637 edge_port->shadowLCR);
2638 if (status != 0)
2639 return;
2640
2641 /* set up the MCR register and send it to the EdgePort */
2642 edge_port->shadowMCR = MCR_MASTER_IE;
2643 if (cflag & CBAUD)
2644 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2645
2646 status = send_cmd_write_uart_register(edge_port, MCR,
2647 edge_port->shadowMCR);
2648 if (status != 0)
2649 return;
2650
2651 /* Determine divisor based on baud rate */
2652 baud = tty_get_baud_rate(tty);
2653 if (!baud) {
2654 /* pick a default, any default... */
2655 baud = 9600;
2656 }
2657
2658 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2659 status = send_cmd_write_baud_rate(edge_port, baud);
2660 if (status == -1) {
2661 /* Speed change was not possible - put back the old speed */
2662 baud = tty_termios_baud_rate(old_termios);
2663 tty_encode_baud_rate(tty, baud, baud);
2664 }
2665 }
2666
2667
2668 /****************************************************************************
2669 * unicode_to_ascii
2670 * Turns a string from Unicode into ASCII.
2671 * Doesn't do a good job with any characters that are outside the normal
2672 * ASCII range, but it's only for debugging...
2673 * NOTE: expects the unicode in LE format
2674 ****************************************************************************/
2675 static void unicode_to_ascii(char *string, int buflen,
2676 __le16 *unicode, int unicode_size)
2677 {
2678 int i;
2679
2680 if (buflen <= 0) /* never happens, but... */
2681 return;
2682 --buflen; /* space for nul */
2683
2684 for (i = 0; i < unicode_size; i++) {
2685 if (i >= buflen)
2686 break;
2687 string[i] = (char)(le16_to_cpu(unicode[i]));
2688 }
2689 string[i] = 0x00;
2690 }
2691
2692
2693 /****************************************************************************
2694 * get_manufacturing_desc
2695 * reads in the manufacturing descriptor and stores it into the serial
2696 * structure.
2697 ****************************************************************************/
2698 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2699 {
2700 struct device *dev = &edge_serial->serial->dev->dev;
2701 int response;
2702
2703 dev_dbg(dev, "getting manufacturer descriptor\n");
2704
2705 response = rom_read(edge_serial->serial,
2706 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2707 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2708 EDGE_MANUF_DESC_LEN,
2709 (__u8 *)(&edge_serial->manuf_descriptor));
2710
2711 if (response < 1)
2712 dev_err(dev, "error in getting manufacturer descriptor\n");
2713 else {
2714 char string[30];
2715 dev_dbg(dev, "**Manufacturer Descriptor\n");
2716 dev_dbg(dev, " RomSize: %dK\n",
2717 edge_serial->manuf_descriptor.RomSize);
2718 dev_dbg(dev, " RamSize: %dK\n",
2719 edge_serial->manuf_descriptor.RamSize);
2720 dev_dbg(dev, " CpuRev: %d\n",
2721 edge_serial->manuf_descriptor.CpuRev);
2722 dev_dbg(dev, " BoardRev: %d\n",
2723 edge_serial->manuf_descriptor.BoardRev);
2724 dev_dbg(dev, " NumPorts: %d\n",
2725 edge_serial->manuf_descriptor.NumPorts);
2726 dev_dbg(dev, " DescDate: %d/%d/%d\n",
2727 edge_serial->manuf_descriptor.DescDate[0],
2728 edge_serial->manuf_descriptor.DescDate[1],
2729 edge_serial->manuf_descriptor.DescDate[2]+1900);
2730 unicode_to_ascii(string, sizeof(string),
2731 edge_serial->manuf_descriptor.SerialNumber,
2732 edge_serial->manuf_descriptor.SerNumLength/2);
2733 dev_dbg(dev, " SerialNumber: %s\n", string);
2734 unicode_to_ascii(string, sizeof(string),
2735 edge_serial->manuf_descriptor.AssemblyNumber,
2736 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2737 dev_dbg(dev, " AssemblyNumber: %s\n", string);
2738 unicode_to_ascii(string, sizeof(string),
2739 edge_serial->manuf_descriptor.OemAssyNumber,
2740 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2741 dev_dbg(dev, " OemAssyNumber: %s\n", string);
2742 dev_dbg(dev, " UartType: %d\n",
2743 edge_serial->manuf_descriptor.UartType);
2744 dev_dbg(dev, " IonPid: %d\n",
2745 edge_serial->manuf_descriptor.IonPid);
2746 dev_dbg(dev, " IonConfig: %d\n",
2747 edge_serial->manuf_descriptor.IonConfig);
2748 }
2749 }
2750
2751
2752 /****************************************************************************
2753 * get_boot_desc
2754 * reads in the bootloader descriptor and stores it into the serial
2755 * structure.
2756 ****************************************************************************/
2757 static void get_boot_desc(struct edgeport_serial *edge_serial)
2758 {
2759 struct device *dev = &edge_serial->serial->dev->dev;
2760 int response;
2761
2762 dev_dbg(dev, "getting boot descriptor\n");
2763
2764 response = rom_read(edge_serial->serial,
2765 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2766 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2767 EDGE_BOOT_DESC_LEN,
2768 (__u8 *)(&edge_serial->boot_descriptor));
2769
2770 if (response < 1)
2771 dev_err(dev, "error in getting boot descriptor\n");
2772 else {
2773 dev_dbg(dev, "**Boot Descriptor:\n");
2774 dev_dbg(dev, " BootCodeLength: %d\n",
2775 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2776 dev_dbg(dev, " MajorVersion: %d\n",
2777 edge_serial->boot_descriptor.MajorVersion);
2778 dev_dbg(dev, " MinorVersion: %d\n",
2779 edge_serial->boot_descriptor.MinorVersion);
2780 dev_dbg(dev, " BuildNumber: %d\n",
2781 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2782 dev_dbg(dev, " Capabilities: 0x%x\n",
2783 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2784 dev_dbg(dev, " UConfig0: %d\n",
2785 edge_serial->boot_descriptor.UConfig0);
2786 dev_dbg(dev, " UConfig1: %d\n",
2787 edge_serial->boot_descriptor.UConfig1);
2788 }
2789 }
2790
2791
2792 /****************************************************************************
2793 * load_application_firmware
2794 * This is called to load the application firmware to the device
2795 ****************************************************************************/
2796 static void load_application_firmware(struct edgeport_serial *edge_serial)
2797 {
2798 struct device *dev = &edge_serial->serial->dev->dev;
2799 const struct ihex_binrec *rec;
2800 const struct firmware *fw;
2801 const char *fw_name;
2802 const char *fw_info;
2803 int response;
2804 __u32 Operaddr;
2805 __u16 build;
2806
2807 switch (edge_serial->product_info.iDownloadFile) {
2808 case EDGE_DOWNLOAD_FILE_I930:
2809 fw_info = "downloading firmware version (930)";
2810 fw_name = "edgeport/down.fw";
2811 break;
2812
2813 case EDGE_DOWNLOAD_FILE_80251:
2814 fw_info = "downloading firmware version (80251)";
2815 fw_name = "edgeport/down2.fw";
2816 break;
2817
2818 case EDGE_DOWNLOAD_FILE_NONE:
2819 dev_dbg(dev, "No download file specified, skipping download\n");
2820 return;
2821
2822 default:
2823 return;
2824 }
2825
2826 response = request_ihex_firmware(&fw, fw_name,
2827 &edge_serial->serial->dev->dev);
2828 if (response) {
2829 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2830 fw_name, response);
2831 return;
2832 }
2833
2834 rec = (const struct ihex_binrec *)fw->data;
2835 build = (rec->data[2] << 8) | rec->data[3];
2836
2837 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2838
2839 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2840 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2841 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2842
2843 for (rec = ihex_next_binrec(rec); rec;
2844 rec = ihex_next_binrec(rec)) {
2845 Operaddr = be32_to_cpu(rec->addr);
2846 response = sram_write(edge_serial->serial,
2847 Operaddr >> 16,
2848 Operaddr & 0xFFFF,
2849 be16_to_cpu(rec->len),
2850 &rec->data[0]);
2851 if (response < 0) {
2852 dev_err(&edge_serial->serial->dev->dev,
2853 "sram_write failed (%x, %x, %d)\n",
2854 Operaddr >> 16, Operaddr & 0xFFFF,
2855 be16_to_cpu(rec->len));
2856 break;
2857 }
2858 }
2859
2860 dev_dbg(dev, "sending exec_dl_code\n");
2861 response = usb_control_msg (edge_serial->serial->dev,
2862 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2863 USB_REQUEST_ION_EXEC_DL_CODE,
2864 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2865
2866 release_firmware(fw);
2867 }
2868
2869
2870 /****************************************************************************
2871 * edge_startup
2872 ****************************************************************************/
2873 static int edge_startup(struct usb_serial *serial)
2874 {
2875 struct edgeport_serial *edge_serial;
2876 struct usb_device *dev;
2877 struct device *ddev = &serial->dev->dev;
2878 int i;
2879 int response;
2880 bool interrupt_in_found;
2881 bool bulk_in_found;
2882 bool bulk_out_found;
2883 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2884 EDGE_COMPATIBILITY_MASK1,
2885 EDGE_COMPATIBILITY_MASK2 };
2886
2887 dev = serial->dev;
2888
2889 /* create our private serial structure */
2890 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2891 if (edge_serial == NULL) {
2892 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2893 return -ENOMEM;
2894 }
2895 spin_lock_init(&edge_serial->es_lock);
2896 edge_serial->serial = serial;
2897 usb_set_serial_data(serial, edge_serial);
2898
2899 /* get the name for the device from the device */
2900 i = usb_string(dev, dev->descriptor.iManufacturer,
2901 &edge_serial->name[0], MAX_NAME_LEN+1);
2902 if (i < 0)
2903 i = 0;
2904 edge_serial->name[i++] = ' ';
2905 usb_string(dev, dev->descriptor.iProduct,
2906 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2907
2908 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2909
2910 /* Read the epic descriptor */
2911 if (get_epic_descriptor(edge_serial) <= 0) {
2912 /* memcpy descriptor to Supports structures */
2913 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2914 sizeof(struct edge_compatibility_bits));
2915
2916 /* get the manufacturing descriptor for this device */
2917 get_manufacturing_desc(edge_serial);
2918
2919 /* get the boot descriptor */
2920 get_boot_desc(edge_serial);
2921
2922 get_product_info(edge_serial);
2923 }
2924
2925 /* set the number of ports from the manufacturing description */
2926 /* serial->num_ports = serial->product_info.NumPorts; */
2927 if ((!edge_serial->is_epic) &&
2928 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2929 dev_warn(ddev,
2930 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2931 edge_serial->product_info.NumPorts,
2932 serial->num_ports);
2933 }
2934
2935 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2936
2937 /* If not an EPiC device */
2938 if (!edge_serial->is_epic) {
2939 /* now load the application firmware into this device */
2940 load_application_firmware(edge_serial);
2941
2942 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2943
2944 /* Check current Edgeport EEPROM and update if necessary */
2945 update_edgeport_E2PROM(edge_serial);
2946
2947 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2948
2949 /* set the configuration to use #1 */
2950 /* dev_dbg(ddev, "set_configuration 1\n"); */
2951 /* usb_set_configuration (dev, 1); */
2952 }
2953 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n",
2954 edge_serial->product_info.FirmwareMajorVersion,
2955 edge_serial->product_info.FirmwareMinorVersion,
2956 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2957
2958 /* we set up the pointers to the endpoints in the edge_open function,
2959 * as the structures aren't created yet. */
2960
2961 response = 0;
2962
2963 if (edge_serial->is_epic) {
2964 /* EPIC thing, set up our interrupt polling now and our read
2965 * urb, so that the device knows it really is connected. */
2966 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2967 for (i = 0; i < serial->interface->altsetting[0]
2968 .desc.bNumEndpoints; ++i) {
2969 struct usb_endpoint_descriptor *endpoint;
2970 int buffer_size;
2971
2972 endpoint = &serial->interface->altsetting[0].
2973 endpoint[i].desc;
2974 buffer_size = usb_endpoint_maxp(endpoint);
2975 if (!interrupt_in_found &&
2976 (usb_endpoint_is_int_in(endpoint))) {
2977 /* we found a interrupt in endpoint */
2978 dev_dbg(ddev, "found interrupt in\n");
2979
2980 /* not set up yet, so do it now */
2981 edge_serial->interrupt_read_urb =
2982 usb_alloc_urb(0, GFP_KERNEL);
2983 if (!edge_serial->interrupt_read_urb) {
2984 dev_err(ddev, "out of memory\n");
2985 return -ENOMEM;
2986 }
2987 edge_serial->interrupt_in_buffer =
2988 kmalloc(buffer_size, GFP_KERNEL);
2989 if (!edge_serial->interrupt_in_buffer) {
2990 dev_err(ddev, "out of memory\n");
2991 usb_free_urb(edge_serial->interrupt_read_urb);
2992 return -ENOMEM;
2993 }
2994 edge_serial->interrupt_in_endpoint =
2995 endpoint->bEndpointAddress;
2996
2997 /* set up our interrupt urb */
2998 usb_fill_int_urb(
2999 edge_serial->interrupt_read_urb,
3000 dev,
3001 usb_rcvintpipe(dev,
3002 endpoint->bEndpointAddress),
3003 edge_serial->interrupt_in_buffer,
3004 buffer_size,
3005 edge_interrupt_callback,
3006 edge_serial,
3007 endpoint->bInterval);
3008
3009 interrupt_in_found = true;
3010 }
3011
3012 if (!bulk_in_found &&
3013 (usb_endpoint_is_bulk_in(endpoint))) {
3014 /* we found a bulk in endpoint */
3015 dev_dbg(ddev, "found bulk in\n");
3016
3017 /* not set up yet, so do it now */
3018 edge_serial->read_urb =
3019 usb_alloc_urb(0, GFP_KERNEL);
3020 if (!edge_serial->read_urb) {
3021 dev_err(ddev, "out of memory\n");
3022 return -ENOMEM;
3023 }
3024 edge_serial->bulk_in_buffer =
3025 kmalloc(buffer_size, GFP_KERNEL);
3026 if (!edge_serial->bulk_in_buffer) {
3027 dev_err(&dev->dev, "out of memory\n");
3028 usb_free_urb(edge_serial->read_urb);
3029 return -ENOMEM;
3030 }
3031 edge_serial->bulk_in_endpoint =
3032 endpoint->bEndpointAddress;
3033
3034 /* set up our bulk in urb */
3035 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3036 usb_rcvbulkpipe(dev,
3037 endpoint->bEndpointAddress),
3038 edge_serial->bulk_in_buffer,
3039 usb_endpoint_maxp(endpoint),
3040 edge_bulk_in_callback,
3041 edge_serial);
3042 bulk_in_found = true;
3043 }
3044
3045 if (!bulk_out_found &&
3046 (usb_endpoint_is_bulk_out(endpoint))) {
3047 /* we found a bulk out endpoint */
3048 dev_dbg(ddev, "found bulk out\n");
3049 edge_serial->bulk_out_endpoint =
3050 endpoint->bEndpointAddress;
3051 bulk_out_found = true;
3052 }
3053 }
3054
3055 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3056 dev_err(ddev, "Error - the proper endpoints were not found!\n");
3057 return -ENODEV;
3058 }
3059
3060 /* start interrupt read for this edgeport this interrupt will
3061 * continue as long as the edgeport is connected */
3062 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3063 GFP_KERNEL);
3064 if (response)
3065 dev_err(ddev, "%s - Error %d submitting control urb\n",
3066 __func__, response);
3067 }
3068 return response;
3069 }
3070
3071
3072 /****************************************************************************
3073 * edge_disconnect
3074 * This function is called whenever the device is removed from the usb bus.
3075 ****************************************************************************/
3076 static void edge_disconnect(struct usb_serial *serial)
3077 {
3078 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3079
3080 /* stop reads and writes on all ports */
3081 /* free up our endpoint stuff */
3082 if (edge_serial->is_epic) {
3083 usb_kill_urb(edge_serial->interrupt_read_urb);
3084 usb_free_urb(edge_serial->interrupt_read_urb);
3085 kfree(edge_serial->interrupt_in_buffer);
3086
3087 usb_kill_urb(edge_serial->read_urb);
3088 usb_free_urb(edge_serial->read_urb);
3089 kfree(edge_serial->bulk_in_buffer);
3090 }
3091 }
3092
3093
3094 /****************************************************************************
3095 * edge_release
3096 * This function is called when the device structure is deallocated.
3097 ****************************************************************************/
3098 static void edge_release(struct usb_serial *serial)
3099 {
3100 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3101
3102 kfree(edge_serial);
3103 }
3104
3105 static int edge_port_probe(struct usb_serial_port *port)
3106 {
3107 struct edgeport_port *edge_port;
3108
3109 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3110 if (!edge_port)
3111 return -ENOMEM;
3112
3113 spin_lock_init(&edge_port->ep_lock);
3114 edge_port->port = port;
3115
3116 usb_set_serial_port_data(port, edge_port);
3117
3118 return 0;
3119 }
3120
3121 static int edge_port_remove(struct usb_serial_port *port)
3122 {
3123 struct edgeport_port *edge_port;
3124
3125 edge_port = usb_get_serial_port_data(port);
3126 kfree(edge_port);
3127
3128 return 0;
3129 }
3130
3131 module_usb_serial_driver(serial_drivers, id_table_combined);
3132
3133 MODULE_AUTHOR(DRIVER_AUTHOR);
3134 MODULE_DESCRIPTION(DRIVER_DESC);
3135 MODULE_LICENSE("GPL");
3136 MODULE_FIRMWARE("edgeport/boot.fw");
3137 MODULE_FIRMWARE("edgeport/boot2.fw");
3138 MODULE_FIRMWARE("edgeport/down.fw");
3139 MODULE_FIRMWARE("edgeport/down2.fw");
Linux kernel - Deliverables
This page took 0.106899 seconds and 6 git commands to generate.