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Merge branch 'slab/procfs' into slab/for-linus
[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 /*
55 * Version Information
56 */
57 #define DRIVER_VERSION "v2.7"
58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
59 #define DRIVER_DESC "Edgeport USB Serial Driver"
60
61 #define MAX_NAME_LEN 64
62
63 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
64 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
65 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
66
67 /* receive port state */
68 enum RXSTATE {
69 EXPECT_HDR1 = 0, /* Expect header byte 1 */
70 EXPECT_HDR2 = 1, /* Expect header byte 2 */
71 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
72 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
73 };
74
75
76 /* Transmit Fifo
77 * This Transmit queue is an extension of the edgeport Rx buffer.
78 * The maximum amount of data buffered in both the edgeport
79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
80 */
81 struct TxFifo {
82 unsigned int head; /* index to head pointer (write) */
83 unsigned int tail; /* index to tail pointer (read) */
84 unsigned int count; /* Bytes in queue */
85 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
86 unsigned char *fifo; /* allocated Buffer */
87 };
88
89 /* This structure holds all of the local port information */
90 struct edgeport_port {
91 __u16 txCredits; /* our current credits for this port */
92 __u16 maxTxCredits; /* the max size of the port */
93
94 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
95 struct urb *write_urb; /* write URB for this port */
96 bool write_in_progress; /* 'true' while a write URB is outstanding */
97 spinlock_t ep_lock;
98
99 __u8 shadowLCR; /* last LCR value received */
100 __u8 shadowMCR; /* last MCR value received */
101 __u8 shadowMSR; /* last MSR value received */
102 __u8 shadowLSR; /* last LSR value received */
103 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
104 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
105 __u8 validDataMask;
106 __u32 baudRate;
107
108 bool open;
109 bool openPending;
110 bool commandPending;
111 bool closePending;
112 bool chaseResponsePending;
113
114 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
115 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
116 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
117 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
118
119 struct async_icount icount;
120 struct usb_serial_port *port; /* loop back to the owner of this object */
121 };
122
123
124 /* This structure holds all of the individual device information */
125 struct edgeport_serial {
126 char name[MAX_NAME_LEN+2]; /* string name of this device */
127
128 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
129 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
130 struct edgeport_product_info product_info; /* Product Info */
131 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
132 int is_epic; /* flag if EPiC device or not */
133
134 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
135 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
136 struct urb *interrupt_read_urb; /* our interrupt urb */
137
138 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
139 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
140 struct urb *read_urb; /* our bulk read urb */
141 bool read_in_progress;
142 spinlock_t es_lock;
143
144 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
145
146 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
147
148 enum RXSTATE rxState; /* the current state of the bulk receive processor */
149 __u8 rxHeader1; /* receive header byte 1 */
150 __u8 rxHeader2; /* receive header byte 2 */
151 __u8 rxHeader3; /* receive header byte 3 */
152 __u8 rxPort; /* the port that we are currently receiving data for */
153 __u8 rxStatusCode; /* the receive status code */
154 __u8 rxStatusParam; /* the receive status paramater */
155 __s16 rxBytesRemaining; /* the number of port bytes left to read */
156 struct usb_serial *serial; /* loop back to the owner of this object */
157 };
158
159 /* baud rate information */
160 struct divisor_table_entry {
161 __u32 BaudRate;
162 __u16 Divisor;
163 };
164
165 /*
166 * Define table of divisors for Rev A EdgePort/4 hardware
167 * These assume a 3.6864MHz crystal, the standard /16, and
168 * MCR.7 = 0.
169 */
170
171 static const struct divisor_table_entry divisor_table[] = {
172 { 50, 4608},
173 { 75, 3072},
174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
176 { 150, 1536},
177 { 300, 768},
178 { 600, 384},
179 { 1200, 192},
180 { 1800, 128},
181 { 2400, 96},
182 { 4800, 48},
183 { 7200, 32},
184 { 9600, 24},
185 { 14400, 16},
186 { 19200, 12},
187 { 38400, 6},
188 { 57600, 4},
189 { 115200, 2},
190 { 230400, 1},
191 };
192
193 /* Number of outstanding Command Write Urbs */
194 static atomic_t CmdUrbs = ATOMIC_INIT(0);
195
196
197 /* local function prototypes */
198
199 /* function prototypes for all URB callbacks */
200 static void edge_interrupt_callback(struct urb *urb);
201 static void edge_bulk_in_callback(struct urb *urb);
202 static void edge_bulk_out_data_callback(struct urb *urb);
203 static void edge_bulk_out_cmd_callback(struct urb *urb);
204
205 /* function prototypes for the usbserial callbacks */
206 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
207 static void edge_close(struct usb_serial_port *port);
208 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
209 const unsigned char *buf, int count);
210 static int edge_write_room(struct tty_struct *tty);
211 static int edge_chars_in_buffer(struct tty_struct *tty);
212 static void edge_throttle(struct tty_struct *tty);
213 static void edge_unthrottle(struct tty_struct *tty);
214 static void edge_set_termios(struct tty_struct *tty,
215 struct usb_serial_port *port,
216 struct ktermios *old_termios);
217 static int edge_ioctl(struct tty_struct *tty,
218 unsigned int cmd, unsigned long arg);
219 static void edge_break(struct tty_struct *tty, int break_state);
220 static int edge_tiocmget(struct tty_struct *tty);
221 static int edge_tiocmset(struct tty_struct *tty,
222 unsigned int set, unsigned int clear);
223 static int edge_get_icount(struct tty_struct *tty,
224 struct serial_icounter_struct *icount);
225 static int edge_startup(struct usb_serial *serial);
226 static void edge_disconnect(struct usb_serial *serial);
227 static void edge_release(struct usb_serial *serial);
228 static int edge_port_probe(struct usb_serial_port *port);
229 static int edge_port_remove(struct usb_serial_port *port);
230
231 #include "io_tables.h" /* all of the devices that this driver supports */
232
233 /* function prototypes for all of our local functions */
234
235 static void process_rcvd_data(struct edgeport_serial *edge_serial,
236 unsigned char *buffer, __u16 bufferLength);
237 static void process_rcvd_status(struct edgeport_serial *edge_serial,
238 __u8 byte2, __u8 byte3);
239 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
240 unsigned char *data, int length);
241 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
242 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
243 __u8 lsr, __u8 data);
244 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
245 __u8 param);
246 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
247 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
248 int baudRate);
249 static void change_port_settings(struct tty_struct *tty,
250 struct edgeport_port *edge_port,
251 struct ktermios *old_termios);
252 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
253 __u8 regNum, __u8 regValue);
254 static int write_cmd_usb(struct edgeport_port *edge_port,
255 unsigned char *buffer, int writeLength);
256 static void send_more_port_data(struct edgeport_serial *edge_serial,
257 struct edgeport_port *edge_port);
258
259 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
260 __u16 length, const __u8 *data);
261 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
262 __u16 length, __u8 *data);
263 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
264 __u16 length, const __u8 *data);
265 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
266 static void get_boot_desc(struct edgeport_serial *edge_serial);
267 static void load_application_firmware(struct edgeport_serial *edge_serial);
268
269 static void unicode_to_ascii(char *string, int buflen,
270 __le16 *unicode, int unicode_size);
271
272
273 /* ************************************************************************ */
274 /* ************************************************************************ */
275 /* ************************************************************************ */
276 /* ************************************************************************ */
277
278 /************************************************************************
279 * *
280 * update_edgeport_E2PROM() Compare current versions of *
281 * Boot ROM and Manufacture *
282 * Descriptors with versions *
283 * embedded in this driver *
284 * *
285 ************************************************************************/
286 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
287 {
288 struct device *dev = &edge_serial->serial->dev->dev;
289 __u32 BootCurVer;
290 __u32 BootNewVer;
291 __u8 BootMajorVersion;
292 __u8 BootMinorVersion;
293 __u16 BootBuildNumber;
294 __u32 Bootaddr;
295 const struct ihex_binrec *rec;
296 const struct firmware *fw;
297 const char *fw_name;
298 int response;
299
300 switch (edge_serial->product_info.iDownloadFile) {
301 case EDGE_DOWNLOAD_FILE_I930:
302 fw_name = "edgeport/boot.fw";
303 break;
304 case EDGE_DOWNLOAD_FILE_80251:
305 fw_name = "edgeport/boot2.fw";
306 break;
307 default:
308 return;
309 }
310
311 response = request_ihex_firmware(&fw, fw_name,
312 &edge_serial->serial->dev->dev);
313 if (response) {
314 dev_err(dev, "Failed to load image \"%s\" err %d\n",
315 fw_name, response);
316 return;
317 }
318
319 rec = (const struct ihex_binrec *)fw->data;
320 BootMajorVersion = rec->data[0];
321 BootMinorVersion = rec->data[1];
322 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
323
324 /* Check Boot Image Version */
325 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
326 (edge_serial->boot_descriptor.MinorVersion << 16) +
327 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
328
329 BootNewVer = (BootMajorVersion << 24) +
330 (BootMinorVersion << 16) +
331 BootBuildNumber;
332
333 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
334 edge_serial->boot_descriptor.MajorVersion,
335 edge_serial->boot_descriptor.MinorVersion,
336 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
337
338
339 if (BootNewVer > BootCurVer) {
340 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
341 edge_serial->boot_descriptor.MajorVersion,
342 edge_serial->boot_descriptor.MinorVersion,
343 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
344 BootMajorVersion, BootMinorVersion, BootBuildNumber);
345
346 dev_dbg(dev, "Downloading new Boot Image\n");
347
348 for (rec = ihex_next_binrec(rec); rec;
349 rec = ihex_next_binrec(rec)) {
350 Bootaddr = be32_to_cpu(rec->addr);
351 response = rom_write(edge_serial->serial,
352 Bootaddr >> 16,
353 Bootaddr & 0xFFFF,
354 be16_to_cpu(rec->len),
355 &rec->data[0]);
356 if (response < 0) {
357 dev_err(&edge_serial->serial->dev->dev,
358 "rom_write failed (%x, %x, %d)\n",
359 Bootaddr >> 16, Bootaddr & 0xFFFF,
360 be16_to_cpu(rec->len));
361 break;
362 }
363 }
364 } else {
365 dev_dbg(dev, "Boot Image -- already up to date\n");
366 }
367 release_firmware(fw);
368 }
369
370 #if 0
371 /************************************************************************
372 *
373 * Get string descriptor from device
374 *
375 ************************************************************************/
376 static int get_string_desc(struct usb_device *dev, int Id,
377 struct usb_string_descriptor **pRetDesc)
378 {
379 struct usb_string_descriptor StringDesc;
380 struct usb_string_descriptor *pStringDesc;
381
382 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
383
384 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
385 sizeof(StringDesc)))
386 return 0;
387
388 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
389 if (!pStringDesc)
390 return -1;
391
392 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
393 StringDesc.bLength)) {
394 kfree(pStringDesc);
395 return -1;
396 }
397
398 *pRetDesc = pStringDesc;
399 return 0;
400 }
401 #endif
402
403 static void dump_product_info(struct edgeport_serial *edge_serial,
404 struct edgeport_product_info *product_info)
405 {
406 struct device *dev = &edge_serial->serial->dev->dev;
407
408 /* Dump Product Info structure */
409 dev_dbg(dev, "**Product Information:\n");
410 dev_dbg(dev, " ProductId %x\n", product_info->ProductId);
411 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts);
412 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer);
413 dev_dbg(dev, " IsServer %d\n", product_info->IsServer);
414 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232);
415 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422);
416 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485);
417 dev_dbg(dev, " RomSize %d\n", product_info->RomSize);
418 dev_dbg(dev, " RamSize %d\n", product_info->RamSize);
419 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev);
420 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev);
421 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n",
422 product_info->BootMajorVersion,
423 product_info->BootMinorVersion,
424 le16_to_cpu(product_info->BootBuildNumber));
425 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n",
426 product_info->FirmwareMajorVersion,
427 product_info->FirmwareMinorVersion,
428 le16_to_cpu(product_info->FirmwareBuildNumber));
429 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n",
430 product_info->ManufactureDescDate[0],
431 product_info->ManufactureDescDate[1],
432 product_info->ManufactureDescDate[2]+1900);
433 dev_dbg(dev, " iDownloadFile 0x%x\n",
434 product_info->iDownloadFile);
435 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer);
436 }
437
438 static void get_product_info(struct edgeport_serial *edge_serial)
439 {
440 struct edgeport_product_info *product_info = &edge_serial->product_info;
441
442 memset(product_info, 0, sizeof(struct edgeport_product_info));
443
444 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
445 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
446 product_info->ProdInfoVer = 0;
447
448 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
449 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
450 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
451 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
452
453 product_info->BootMajorVersion =
454 edge_serial->boot_descriptor.MajorVersion;
455 product_info->BootMinorVersion =
456 edge_serial->boot_descriptor.MinorVersion;
457 product_info->BootBuildNumber =
458 edge_serial->boot_descriptor.BuildNumber;
459
460 memcpy(product_info->ManufactureDescDate,
461 edge_serial->manuf_descriptor.DescDate,
462 sizeof(edge_serial->manuf_descriptor.DescDate));
463
464 /* check if this is 2nd generation hardware */
465 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
466 & ION_DEVICE_ID_80251_NETCHIP)
467 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
468 else
469 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
470
471 /* Determine Product type and set appropriate flags */
472 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
473 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
474 case ION_DEVICE_ID_EDGEPORT_4T:
475 case ION_DEVICE_ID_EDGEPORT_4:
476 case ION_DEVICE_ID_EDGEPORT_2:
477 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
478 case ION_DEVICE_ID_EDGEPORT_8:
479 case ION_DEVICE_ID_EDGEPORT_421:
480 case ION_DEVICE_ID_EDGEPORT_21:
481 case ION_DEVICE_ID_EDGEPORT_2_DIN:
482 case ION_DEVICE_ID_EDGEPORT_4_DIN:
483 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
484 product_info->IsRS232 = 1;
485 break;
486
487 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
488 product_info->IsRS422 = 1;
489 product_info->IsRS485 = 1;
490 break;
491
492 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
493 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
494 product_info->IsRS422 = 1;
495 break;
496 }
497
498 dump_product_info(edge_serial, product_info);
499 }
500
501 static int get_epic_descriptor(struct edgeport_serial *ep)
502 {
503 int result;
504 struct usb_serial *serial = ep->serial;
505 struct edgeport_product_info *product_info = &ep->product_info;
506 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
507 struct edge_compatibility_bits *bits;
508 struct device *dev = &serial->dev->dev;
509
510 ep->is_epic = 0;
511 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
512 USB_REQUEST_ION_GET_EPIC_DESC,
513 0xC0, 0x00, 0x00,
514 &ep->epic_descriptor,
515 sizeof(struct edge_compatibility_descriptor),
516 300);
517
518 if (result > 0) {
519 ep->is_epic = 1;
520 memset(product_info, 0, sizeof(struct edgeport_product_info));
521
522 product_info->NumPorts = epic->NumPorts;
523 product_info->ProdInfoVer = 0;
524 product_info->FirmwareMajorVersion = epic->MajorVersion;
525 product_info->FirmwareMinorVersion = epic->MinorVersion;
526 product_info->FirmwareBuildNumber = epic->BuildNumber;
527 product_info->iDownloadFile = epic->iDownloadFile;
528 product_info->EpicVer = epic->EpicVer;
529 product_info->Epic = epic->Supports;
530 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
531 dump_product_info(ep, product_info);
532
533 bits = &ep->epic_descriptor.Supports;
534 dev_dbg(dev, "**EPIC descriptor:\n");
535 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
536 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE");
537 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE");
538 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE");
539 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
540 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
541 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE");
542 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
543 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
544 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE");
545 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE");
546 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
547 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE");
548 }
549
550 return result;
551 }
552
553
554 /************************************************************************/
555 /************************************************************************/
556 /* U S B C A L L B A C K F U N C T I O N S */
557 /* U S B C A L L B A C K F U N C T I O N S */
558 /************************************************************************/
559 /************************************************************************/
560
561 /*****************************************************************************
562 * edge_interrupt_callback
563 * this is the callback function for when we have received data on the
564 * interrupt endpoint.
565 *****************************************************************************/
566 static void edge_interrupt_callback(struct urb *urb)
567 {
568 struct edgeport_serial *edge_serial = urb->context;
569 struct device *dev;
570 struct edgeport_port *edge_port;
571 struct usb_serial_port *port;
572 struct tty_struct *tty;
573 unsigned char *data = urb->transfer_buffer;
574 int length = urb->actual_length;
575 int bytes_avail;
576 int position;
577 int txCredits;
578 int portNumber;
579 int result;
580 int status = urb->status;
581
582 switch (status) {
583 case 0:
584 /* success */
585 break;
586 case -ECONNRESET:
587 case -ENOENT:
588 case -ESHUTDOWN:
589 /* this urb is terminated, clean up */
590 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
591 return;
592 default:
593 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
594 goto exit;
595 }
596
597 dev = &edge_serial->serial->dev->dev;
598
599 /* process this interrupt-read even if there are no ports open */
600 if (length) {
601 usb_serial_debug_data(dev, __func__, length, data);
602
603 if (length > 1) {
604 bytes_avail = data[0] | (data[1] << 8);
605 if (bytes_avail) {
606 spin_lock(&edge_serial->es_lock);
607 edge_serial->rxBytesAvail += bytes_avail;
608 dev_dbg(dev,
609 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
610 __func__, bytes_avail,
611 edge_serial->rxBytesAvail,
612 edge_serial->read_in_progress);
613
614 if (edge_serial->rxBytesAvail > 0 &&
615 !edge_serial->read_in_progress) {
616 dev_dbg(dev, "%s - posting a read\n", __func__);
617 edge_serial->read_in_progress = true;
618
619 /* we have pending bytes on the
620 bulk in pipe, send a request */
621 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
622 if (result) {
623 dev_err(dev,
624 "%s - usb_submit_urb(read bulk) failed with result = %d\n",
625 __func__, result);
626 edge_serial->read_in_progress = false;
627 }
628 }
629 spin_unlock(&edge_serial->es_lock);
630 }
631 }
632 /* grab the txcredits for the ports if available */
633 position = 2;
634 portNumber = 0;
635 while ((position < length) &&
636 (portNumber < edge_serial->serial->num_ports)) {
637 txCredits = data[position] | (data[position+1] << 8);
638 if (txCredits) {
639 port = edge_serial->serial->port[portNumber];
640 edge_port = usb_get_serial_port_data(port);
641 if (edge_port->open) {
642 spin_lock(&edge_port->ep_lock);
643 edge_port->txCredits += txCredits;
644 spin_unlock(&edge_port->ep_lock);
645 dev_dbg(dev, "%s - txcredits for port%d = %d\n",
646 __func__, portNumber,
647 edge_port->txCredits);
648
649 /* tell the tty driver that something
650 has changed */
651 tty = tty_port_tty_get(
652 &edge_port->port->port);
653 if (tty) {
654 tty_wakeup(tty);
655 tty_kref_put(tty);
656 }
657 /* Since we have more credit, check
658 if more data can be sent */
659 send_more_port_data(edge_serial,
660 edge_port);
661 }
662 }
663 position += 2;
664 ++portNumber;
665 }
666 }
667
668 exit:
669 result = usb_submit_urb(urb, GFP_ATOMIC);
670 if (result)
671 dev_err(&urb->dev->dev,
672 "%s - Error %d submitting control urb\n",
673 __func__, result);
674 }
675
676
677 /*****************************************************************************
678 * edge_bulk_in_callback
679 * this is the callback function for when we have received data on the
680 * bulk in endpoint.
681 *****************************************************************************/
682 static void edge_bulk_in_callback(struct urb *urb)
683 {
684 struct edgeport_serial *edge_serial = urb->context;
685 struct device *dev;
686 unsigned char *data = urb->transfer_buffer;
687 int retval;
688 __u16 raw_data_length;
689 int status = urb->status;
690
691 if (status) {
692 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
693 __func__, status);
694 edge_serial->read_in_progress = false;
695 return;
696 }
697
698 if (urb->actual_length == 0) {
699 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
700 edge_serial->read_in_progress = false;
701 return;
702 }
703
704 dev = &edge_serial->serial->dev->dev;
705 raw_data_length = urb->actual_length;
706
707 usb_serial_debug_data(dev, __func__, raw_data_length, data);
708
709 spin_lock(&edge_serial->es_lock);
710
711 /* decrement our rxBytes available by the number that we just got */
712 edge_serial->rxBytesAvail -= raw_data_length;
713
714 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
715 raw_data_length, edge_serial->rxBytesAvail);
716
717 process_rcvd_data(edge_serial, data, urb->actual_length);
718
719 /* check to see if there's any more data for us to read */
720 if (edge_serial->rxBytesAvail > 0) {
721 dev_dbg(dev, "%s - posting a read\n", __func__);
722 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
723 if (retval) {
724 dev_err(dev,
725 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
726 __func__, retval);
727 edge_serial->read_in_progress = false;
728 }
729 } else {
730 edge_serial->read_in_progress = false;
731 }
732
733 spin_unlock(&edge_serial->es_lock);
734 }
735
736
737 /*****************************************************************************
738 * edge_bulk_out_data_callback
739 * this is the callback function for when we have finished sending
740 * serial data on the bulk out endpoint.
741 *****************************************************************************/
742 static void edge_bulk_out_data_callback(struct urb *urb)
743 {
744 struct edgeport_port *edge_port = urb->context;
745 struct tty_struct *tty;
746 int status = urb->status;
747
748 if (status) {
749 dev_dbg(&urb->dev->dev,
750 "%s - nonzero write bulk status received: %d\n",
751 __func__, status);
752 }
753
754 tty = tty_port_tty_get(&edge_port->port->port);
755
756 if (tty && edge_port->open) {
757 /* let the tty driver wakeup if it has a special
758 write_wakeup function */
759 tty_wakeup(tty);
760 }
761 tty_kref_put(tty);
762
763 /* Release the Write URB */
764 edge_port->write_in_progress = false;
765
766 /* Check if more data needs to be sent */
767 send_more_port_data((struct edgeport_serial *)
768 (usb_get_serial_data(edge_port->port->serial)), edge_port);
769 }
770
771
772 /*****************************************************************************
773 * BulkOutCmdCallback
774 * this is the callback function for when we have finished sending a
775 * command on the bulk out endpoint.
776 *****************************************************************************/
777 static void edge_bulk_out_cmd_callback(struct urb *urb)
778 {
779 struct edgeport_port *edge_port = urb->context;
780 struct tty_struct *tty;
781 int status = urb->status;
782
783 atomic_dec(&CmdUrbs);
784 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
785 __func__, urb, atomic_read(&CmdUrbs));
786
787
788 /* clean up the transfer buffer */
789 kfree(urb->transfer_buffer);
790
791 /* Free the command urb */
792 usb_free_urb(urb);
793
794 if (status) {
795 dev_dbg(&urb->dev->dev,
796 "%s - nonzero write bulk status received: %d\n",
797 __func__, status);
798 return;
799 }
800
801 /* Get pointer to tty */
802 tty = tty_port_tty_get(&edge_port->port->port);
803
804 /* tell the tty driver that something has changed */
805 if (tty && edge_port->open)
806 tty_wakeup(tty);
807 tty_kref_put(tty);
808
809 /* we have completed the command */
810 edge_port->commandPending = false;
811 wake_up(&edge_port->wait_command);
812 }
813
814
815 /*****************************************************************************
816 * Driver tty interface functions
817 *****************************************************************************/
818
819 /*****************************************************************************
820 * SerialOpen
821 * this function is called by the tty driver when a port is opened
822 * If successful, we return 0
823 * Otherwise we return a negative error number.
824 *****************************************************************************/
825 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
826 {
827 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
828 struct device *dev = &port->dev;
829 struct usb_serial *serial;
830 struct edgeport_serial *edge_serial;
831 int response;
832
833 if (edge_port == NULL)
834 return -ENODEV;
835
836 /* see if we've set up our endpoint info yet (can't set it up
837 in edge_startup as the structures were not set up at that time.) */
838 serial = port->serial;
839 edge_serial = usb_get_serial_data(serial);
840 if (edge_serial == NULL)
841 return -ENODEV;
842 if (edge_serial->interrupt_in_buffer == NULL) {
843 struct usb_serial_port *port0 = serial->port[0];
844
845 /* not set up yet, so do it now */
846 edge_serial->interrupt_in_buffer =
847 port0->interrupt_in_buffer;
848 edge_serial->interrupt_in_endpoint =
849 port0->interrupt_in_endpointAddress;
850 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
851 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
852 edge_serial->bulk_in_endpoint =
853 port0->bulk_in_endpointAddress;
854 edge_serial->read_urb = port0->read_urb;
855 edge_serial->bulk_out_endpoint =
856 port0->bulk_out_endpointAddress;
857
858 /* set up our interrupt urb */
859 usb_fill_int_urb(edge_serial->interrupt_read_urb,
860 serial->dev,
861 usb_rcvintpipe(serial->dev,
862 port0->interrupt_in_endpointAddress),
863 port0->interrupt_in_buffer,
864 edge_serial->interrupt_read_urb->transfer_buffer_length,
865 edge_interrupt_callback, edge_serial,
866 edge_serial->interrupt_read_urb->interval);
867
868 /* set up our bulk in urb */
869 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
870 usb_rcvbulkpipe(serial->dev,
871 port0->bulk_in_endpointAddress),
872 port0->bulk_in_buffer,
873 edge_serial->read_urb->transfer_buffer_length,
874 edge_bulk_in_callback, edge_serial);
875 edge_serial->read_in_progress = false;
876
877 /* start interrupt read for this edgeport
878 * this interrupt will continue as long
879 * as the edgeport is connected */
880 response = usb_submit_urb(edge_serial->interrupt_read_urb,
881 GFP_KERNEL);
882 if (response) {
883 dev_err(dev, "%s - Error %d submitting control urb\n",
884 __func__, response);
885 }
886 }
887
888 /* initialize our wait queues */
889 init_waitqueue_head(&edge_port->wait_open);
890 init_waitqueue_head(&edge_port->wait_chase);
891 init_waitqueue_head(&edge_port->delta_msr_wait);
892 init_waitqueue_head(&edge_port->wait_command);
893
894 /* initialize our icount structure */
895 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
896
897 /* initialize our port settings */
898 edge_port->txCredits = 0; /* Can't send any data yet */
899 /* Must always set this bit to enable ints! */
900 edge_port->shadowMCR = MCR_MASTER_IE;
901 edge_port->chaseResponsePending = false;
902
903 /* send a open port command */
904 edge_port->openPending = true;
905 edge_port->open = false;
906 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
907
908 if (response < 0) {
909 dev_err(dev, "%s - error sending open port command\n", __func__);
910 edge_port->openPending = false;
911 return -ENODEV;
912 }
913
914 /* now wait for the port to be completely opened */
915 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
916 OPEN_TIMEOUT);
917
918 if (!edge_port->open) {
919 /* open timed out */
920 dev_dbg(dev, "%s - open timedout\n", __func__);
921 edge_port->openPending = false;
922 return -ENODEV;
923 }
924
925 /* create the txfifo */
926 edge_port->txfifo.head = 0;
927 edge_port->txfifo.tail = 0;
928 edge_port->txfifo.count = 0;
929 edge_port->txfifo.size = edge_port->maxTxCredits;
930 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
931
932 if (!edge_port->txfifo.fifo) {
933 dev_dbg(dev, "%s - no memory\n", __func__);
934 edge_close(port);
935 return -ENOMEM;
936 }
937
938 /* Allocate a URB for the write */
939 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
940 edge_port->write_in_progress = false;
941
942 if (!edge_port->write_urb) {
943 dev_dbg(dev, "%s - no memory\n", __func__);
944 edge_close(port);
945 return -ENOMEM;
946 }
947
948 dev_dbg(dev, "%s(%d) - Initialize TX fifo to %d bytes\n",
949 __func__, port->number, edge_port->maxTxCredits);
950
951 return 0;
952 }
953
954
955 /************************************************************************
956 *
957 * block_until_chase_response
958 *
959 * This function will block the close until one of the following:
960 * 1. Response to our Chase comes from Edgeport
961 * 2. A timeout of 10 seconds without activity has expired
962 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
963 *
964 ************************************************************************/
965 static void block_until_chase_response(struct edgeport_port *edge_port)
966 {
967 struct device *dev = &edge_port->port->dev;
968 DEFINE_WAIT(wait);
969 __u16 lastCredits;
970 int timeout = 1*HZ;
971 int loop = 10;
972
973 while (1) {
974 /* Save Last credits */
975 lastCredits = edge_port->txCredits;
976
977 /* Did we get our Chase response */
978 if (!edge_port->chaseResponsePending) {
979 dev_dbg(dev, "%s - Got Chase Response\n", __func__);
980
981 /* did we get all of our credit back? */
982 if (edge_port->txCredits == edge_port->maxTxCredits) {
983 dev_dbg(dev, "%s - Got all credits\n", __func__);
984 return;
985 }
986 }
987
988 /* Block the thread for a while */
989 prepare_to_wait(&edge_port->wait_chase, &wait,
990 TASK_UNINTERRUPTIBLE);
991 schedule_timeout(timeout);
992 finish_wait(&edge_port->wait_chase, &wait);
993
994 if (lastCredits == edge_port->txCredits) {
995 /* No activity.. count down. */
996 loop--;
997 if (loop == 0) {
998 edge_port->chaseResponsePending = false;
999 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
1000 return;
1001 }
1002 } else {
1003 /* Reset timeout value back to 10 seconds */
1004 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
1005 lastCredits, edge_port->txCredits);
1006 loop = 10;
1007 }
1008 }
1009 }
1010
1011
1012 /************************************************************************
1013 *
1014 * block_until_tx_empty
1015 *
1016 * This function will block the close until one of the following:
1017 * 1. TX count are 0
1018 * 2. The edgeport has stopped
1019 * 3. A timeout of 3 seconds without activity has expired
1020 *
1021 ************************************************************************/
1022 static void block_until_tx_empty(struct edgeport_port *edge_port)
1023 {
1024 struct device *dev = &edge_port->port->dev;
1025 DEFINE_WAIT(wait);
1026 struct TxFifo *fifo = &edge_port->txfifo;
1027 __u32 lastCount;
1028 int timeout = HZ/10;
1029 int loop = 30;
1030
1031 while (1) {
1032 /* Save Last count */
1033 lastCount = fifo->count;
1034
1035 /* Is the Edgeport Buffer empty? */
1036 if (lastCount == 0) {
1037 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1038 return;
1039 }
1040
1041 /* Block the thread for a while */
1042 prepare_to_wait(&edge_port->wait_chase, &wait,
1043 TASK_UNINTERRUPTIBLE);
1044 schedule_timeout(timeout);
1045 finish_wait(&edge_port->wait_chase, &wait);
1046
1047 dev_dbg(dev, "%s wait\n", __func__);
1048
1049 if (lastCount == fifo->count) {
1050 /* No activity.. count down. */
1051 loop--;
1052 if (loop == 0) {
1053 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1054 return;
1055 }
1056 } else {
1057 /* Reset timeout value back to seconds */
1058 loop = 30;
1059 }
1060 }
1061 }
1062
1063
1064 /*****************************************************************************
1065 * edge_close
1066 * this function is called by the tty driver when a port is closed
1067 *****************************************************************************/
1068 static void edge_close(struct usb_serial_port *port)
1069 {
1070 struct edgeport_serial *edge_serial;
1071 struct edgeport_port *edge_port;
1072 int status;
1073
1074 edge_serial = usb_get_serial_data(port->serial);
1075 edge_port = usb_get_serial_port_data(port);
1076 if (edge_serial == NULL || edge_port == NULL)
1077 return;
1078
1079 /* block until tx is empty */
1080 block_until_tx_empty(edge_port);
1081
1082 edge_port->closePending = true;
1083
1084 if ((!edge_serial->is_epic) ||
1085 ((edge_serial->is_epic) &&
1086 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1087 /* flush and chase */
1088 edge_port->chaseResponsePending = true;
1089
1090 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1091 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1092 if (status == 0)
1093 /* block until chase finished */
1094 block_until_chase_response(edge_port);
1095 else
1096 edge_port->chaseResponsePending = false;
1097 }
1098
1099 if ((!edge_serial->is_epic) ||
1100 ((edge_serial->is_epic) &&
1101 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1102 /* close the port */
1103 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1104 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1105 }
1106
1107 /* port->close = true; */
1108 edge_port->closePending = false;
1109 edge_port->open = false;
1110 edge_port->openPending = false;
1111
1112 usb_kill_urb(edge_port->write_urb);
1113
1114 if (edge_port->write_urb) {
1115 /* if this urb had a transfer buffer already
1116 (old transfer) free it */
1117 kfree(edge_port->write_urb->transfer_buffer);
1118 usb_free_urb(edge_port->write_urb);
1119 edge_port->write_urb = NULL;
1120 }
1121 kfree(edge_port->txfifo.fifo);
1122 edge_port->txfifo.fifo = NULL;
1123 }
1124
1125 /*****************************************************************************
1126 * SerialWrite
1127 * this function is called by the tty driver when data should be written
1128 * to the port.
1129 * If successful, we return the number of bytes written, otherwise we
1130 * return a negative error number.
1131 *****************************************************************************/
1132 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1133 const unsigned char *data, int count)
1134 {
1135 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1136 struct TxFifo *fifo;
1137 int copySize;
1138 int bytesleft;
1139 int firsthalf;
1140 int secondhalf;
1141 unsigned long flags;
1142
1143 if (edge_port == NULL)
1144 return -ENODEV;
1145
1146 /* get a pointer to the Tx fifo */
1147 fifo = &edge_port->txfifo;
1148
1149 spin_lock_irqsave(&edge_port->ep_lock, flags);
1150
1151 /* calculate number of bytes to put in fifo */
1152 copySize = min((unsigned int)count,
1153 (edge_port->txCredits - fifo->count));
1154
1155 dev_dbg(&port->dev, "%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes\n",
1156 __func__, port->number, count,
1157 edge_port->txCredits - fifo->count, copySize);
1158
1159 /* catch writes of 0 bytes which the tty driver likes to give us,
1160 and when txCredits is empty */
1161 if (copySize == 0) {
1162 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1163 goto finish_write;
1164 }
1165
1166 /* queue the data
1167 * since we can never overflow the buffer we do not have to check for a
1168 * full condition
1169 *
1170 * the copy is done is two parts -- first fill to the end of the buffer
1171 * then copy the reset from the start of the buffer
1172 */
1173 bytesleft = fifo->size - fifo->head;
1174 firsthalf = min(bytesleft, copySize);
1175 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1176 firsthalf, bytesleft);
1177
1178 /* now copy our data */
1179 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1180 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1181
1182 /* update the index and size */
1183 fifo->head += firsthalf;
1184 fifo->count += firsthalf;
1185
1186 /* wrap the index */
1187 if (fifo->head == fifo->size)
1188 fifo->head = 0;
1189
1190 secondhalf = copySize-firsthalf;
1191
1192 if (secondhalf) {
1193 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1194 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1195 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1196 /* update the index and size */
1197 fifo->count += secondhalf;
1198 fifo->head += secondhalf;
1199 /* No need to check for wrap since we can not get to end of
1200 * the fifo in this part
1201 */
1202 }
1203
1204 finish_write:
1205 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1206
1207 send_more_port_data((struct edgeport_serial *)
1208 usb_get_serial_data(port->serial), edge_port);
1209
1210 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1211 __func__, copySize, edge_port->txCredits, fifo->count);
1212
1213 return copySize;
1214 }
1215
1216
1217 /************************************************************************
1218 *
1219 * send_more_port_data()
1220 *
1221 * This routine attempts to write additional UART transmit data
1222 * to a port over the USB bulk pipe. It is called (1) when new
1223 * data has been written to a port's TxBuffer from higher layers
1224 * (2) when the peripheral sends us additional TxCredits indicating
1225 * that it can accept more Tx data for a given port; and (3) when
1226 * a bulk write completes successfully and we want to see if we
1227 * can transmit more.
1228 *
1229 ************************************************************************/
1230 static void send_more_port_data(struct edgeport_serial *edge_serial,
1231 struct edgeport_port *edge_port)
1232 {
1233 struct TxFifo *fifo = &edge_port->txfifo;
1234 struct device *dev = &edge_port->port->dev;
1235 struct urb *urb;
1236 unsigned char *buffer;
1237 int status;
1238 int count;
1239 int bytesleft;
1240 int firsthalf;
1241 int secondhalf;
1242 unsigned long flags;
1243
1244 spin_lock_irqsave(&edge_port->ep_lock, flags);
1245
1246 if (edge_port->write_in_progress ||
1247 !edge_port->open ||
1248 (fifo->count == 0)) {
1249 dev_dbg(dev, "%s(%d) EXIT - fifo %d, PendingWrite = %d\n",
1250 __func__, edge_port->port->number,
1251 fifo->count, edge_port->write_in_progress);
1252 goto exit_send;
1253 }
1254
1255 /* since the amount of data in the fifo will always fit into the
1256 * edgeport buffer we do not need to check the write length
1257 *
1258 * Do we have enough credits for this port to make it worthwhile
1259 * to bother queueing a write. If it's too small, say a few bytes,
1260 * it's better to wait for more credits so we can do a larger write.
1261 */
1262 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1263 dev_dbg(dev, "%s(%d) Not enough credit - fifo %d TxCredit %d\n",
1264 __func__, edge_port->port->number, fifo->count,
1265 edge_port->txCredits);
1266 goto exit_send;
1267 }
1268
1269 /* lock this write */
1270 edge_port->write_in_progress = true;
1271
1272 /* get a pointer to the write_urb */
1273 urb = edge_port->write_urb;
1274
1275 /* make sure transfer buffer is freed */
1276 kfree(urb->transfer_buffer);
1277 urb->transfer_buffer = NULL;
1278
1279 /* build the data header for the buffer and port that we are about
1280 to send out */
1281 count = fifo->count;
1282 buffer = kmalloc(count+2, GFP_ATOMIC);
1283 if (buffer == NULL) {
1284 dev_err_console(edge_port->port,
1285 "%s - no more kernel memory...\n", __func__);
1286 edge_port->write_in_progress = false;
1287 goto exit_send;
1288 }
1289 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1290 - edge_port->port->serial->minor, count);
1291 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1292 - edge_port->port->serial->minor, count);
1293
1294 /* now copy our data */
1295 bytesleft = fifo->size - fifo->tail;
1296 firsthalf = min(bytesleft, count);
1297 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1298 fifo->tail += firsthalf;
1299 fifo->count -= firsthalf;
1300 if (fifo->tail == fifo->size)
1301 fifo->tail = 0;
1302
1303 secondhalf = count-firsthalf;
1304 if (secondhalf) {
1305 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1306 secondhalf);
1307 fifo->tail += secondhalf;
1308 fifo->count -= secondhalf;
1309 }
1310
1311 if (count)
1312 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1313
1314 /* fill up the urb with all of our data and submit it */
1315 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1316 usb_sndbulkpipe(edge_serial->serial->dev,
1317 edge_serial->bulk_out_endpoint),
1318 buffer, count+2,
1319 edge_bulk_out_data_callback, edge_port);
1320
1321 /* decrement the number of credits we have by the number we just sent */
1322 edge_port->txCredits -= count;
1323 edge_port->icount.tx += count;
1324
1325 status = usb_submit_urb(urb, GFP_ATOMIC);
1326 if (status) {
1327 /* something went wrong */
1328 dev_err_console(edge_port->port,
1329 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1330 __func__, status);
1331 edge_port->write_in_progress = false;
1332
1333 /* revert the credits as something bad happened. */
1334 edge_port->txCredits += count;
1335 edge_port->icount.tx -= count;
1336 }
1337 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1338 __func__, count, edge_port->txCredits, fifo->count);
1339
1340 exit_send:
1341 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1342 }
1343
1344
1345 /*****************************************************************************
1346 * edge_write_room
1347 * this function is called by the tty driver when it wants to know how
1348 * many bytes of data we can accept for a specific port. If successful,
1349 * we return the amount of room that we have for this port (the txCredits)
1350 * otherwise we return a negative error number.
1351 *****************************************************************************/
1352 static int edge_write_room(struct tty_struct *tty)
1353 {
1354 struct usb_serial_port *port = tty->driver_data;
1355 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1356 int room;
1357 unsigned long flags;
1358
1359 if (edge_port == NULL)
1360 return 0;
1361 if (edge_port->closePending)
1362 return 0;
1363
1364 if (!edge_port->open) {
1365 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1366 return 0;
1367 }
1368
1369 /* total of both buffers is still txCredit */
1370 spin_lock_irqsave(&edge_port->ep_lock, flags);
1371 room = edge_port->txCredits - edge_port->txfifo.count;
1372 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1373
1374 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1375 return room;
1376 }
1377
1378
1379 /*****************************************************************************
1380 * edge_chars_in_buffer
1381 * this function is called by the tty driver when it wants to know how
1382 * many bytes of data we currently have outstanding in the port (data that
1383 * has been written, but hasn't made it out the port yet)
1384 * If successful, we return the number of bytes left to be written in the
1385 * system,
1386 * Otherwise we return a negative error number.
1387 *****************************************************************************/
1388 static int edge_chars_in_buffer(struct tty_struct *tty)
1389 {
1390 struct usb_serial_port *port = tty->driver_data;
1391 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1392 int num_chars;
1393 unsigned long flags;
1394
1395 if (edge_port == NULL)
1396 return 0;
1397 if (edge_port->closePending)
1398 return 0;
1399
1400 if (!edge_port->open) {
1401 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1402 return 0;
1403 }
1404
1405 spin_lock_irqsave(&edge_port->ep_lock, flags);
1406 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1407 edge_port->txfifo.count;
1408 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1409 if (num_chars) {
1410 dev_dbg(&port->dev, "%s(port %d) - returns %d\n", __func__,
1411 port->number, num_chars);
1412 }
1413
1414 return num_chars;
1415 }
1416
1417
1418 /*****************************************************************************
1419 * SerialThrottle
1420 * this function is called by the tty driver when it wants to stop the data
1421 * being read from the port.
1422 *****************************************************************************/
1423 static void edge_throttle(struct tty_struct *tty)
1424 {
1425 struct usb_serial_port *port = tty->driver_data;
1426 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1427 int status;
1428
1429 if (edge_port == NULL)
1430 return;
1431
1432 if (!edge_port->open) {
1433 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1434 return;
1435 }
1436
1437 /* if we are implementing XON/XOFF, send the stop character */
1438 if (I_IXOFF(tty)) {
1439 unsigned char stop_char = STOP_CHAR(tty);
1440 status = edge_write(tty, port, &stop_char, 1);
1441 if (status <= 0)
1442 return;
1443 }
1444
1445 /* if we are implementing RTS/CTS, toggle that line */
1446 if (tty->termios.c_cflag & CRTSCTS) {
1447 edge_port->shadowMCR &= ~MCR_RTS;
1448 status = send_cmd_write_uart_register(edge_port, MCR,
1449 edge_port->shadowMCR);
1450 if (status != 0)
1451 return;
1452 }
1453 }
1454
1455
1456 /*****************************************************************************
1457 * edge_unthrottle
1458 * this function is called by the tty driver when it wants to resume the
1459 * data being read from the port (called after SerialThrottle is called)
1460 *****************************************************************************/
1461 static void edge_unthrottle(struct tty_struct *tty)
1462 {
1463 struct usb_serial_port *port = tty->driver_data;
1464 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1465 int status;
1466
1467 if (edge_port == NULL)
1468 return;
1469
1470 if (!edge_port->open) {
1471 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1472 return;
1473 }
1474
1475 /* if we are implementing XON/XOFF, send the start character */
1476 if (I_IXOFF(tty)) {
1477 unsigned char start_char = START_CHAR(tty);
1478 status = edge_write(tty, port, &start_char, 1);
1479 if (status <= 0)
1480 return;
1481 }
1482 /* if we are implementing RTS/CTS, toggle that line */
1483 if (tty->termios.c_cflag & CRTSCTS) {
1484 edge_port->shadowMCR |= MCR_RTS;
1485 send_cmd_write_uart_register(edge_port, MCR,
1486 edge_port->shadowMCR);
1487 }
1488 }
1489
1490
1491 /*****************************************************************************
1492 * SerialSetTermios
1493 * this function is called by the tty driver when it wants to change
1494 * the termios structure
1495 *****************************************************************************/
1496 static void edge_set_termios(struct tty_struct *tty,
1497 struct usb_serial_port *port, struct ktermios *old_termios)
1498 {
1499 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1500 unsigned int cflag;
1501
1502 cflag = tty->termios.c_cflag;
1503 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1504 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1505
1506 if (edge_port == NULL)
1507 return;
1508
1509 if (!edge_port->open) {
1510 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1511 return;
1512 }
1513
1514 /* change the port settings to the new ones specified */
1515 change_port_settings(tty, edge_port, old_termios);
1516 }
1517
1518
1519 /*****************************************************************************
1520 * get_lsr_info - get line status register info
1521 *
1522 * Purpose: Let user call ioctl() to get info when the UART physically
1523 * is emptied. On bus types like RS485, the transmitter must
1524 * release the bus after transmitting. This must be done when
1525 * the transmit shift register is empty, not be done when the
1526 * transmit holding register is empty. This functionality
1527 * allows an RS485 driver to be written in user space.
1528 *****************************************************************************/
1529 static int get_lsr_info(struct edgeport_port *edge_port,
1530 unsigned int __user *value)
1531 {
1532 unsigned int result = 0;
1533 unsigned long flags;
1534
1535 spin_lock_irqsave(&edge_port->ep_lock, flags);
1536 if (edge_port->maxTxCredits == edge_port->txCredits &&
1537 edge_port->txfifo.count == 0) {
1538 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1539 result = TIOCSER_TEMT;
1540 }
1541 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1542
1543 if (copy_to_user(value, &result, sizeof(int)))
1544 return -EFAULT;
1545 return 0;
1546 }
1547
1548 static int edge_tiocmset(struct tty_struct *tty,
1549 unsigned int set, unsigned int clear)
1550 {
1551 struct usb_serial_port *port = tty->driver_data;
1552 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1553 unsigned int mcr;
1554
1555 mcr = edge_port->shadowMCR;
1556 if (set & TIOCM_RTS)
1557 mcr |= MCR_RTS;
1558 if (set & TIOCM_DTR)
1559 mcr |= MCR_DTR;
1560 if (set & TIOCM_LOOP)
1561 mcr |= MCR_LOOPBACK;
1562
1563 if (clear & TIOCM_RTS)
1564 mcr &= ~MCR_RTS;
1565 if (clear & TIOCM_DTR)
1566 mcr &= ~MCR_DTR;
1567 if (clear & TIOCM_LOOP)
1568 mcr &= ~MCR_LOOPBACK;
1569
1570 edge_port->shadowMCR = mcr;
1571
1572 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1573
1574 return 0;
1575 }
1576
1577 static int edge_tiocmget(struct tty_struct *tty)
1578 {
1579 struct usb_serial_port *port = tty->driver_data;
1580 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1581 unsigned int result = 0;
1582 unsigned int msr;
1583 unsigned int mcr;
1584
1585 msr = edge_port->shadowMSR;
1586 mcr = edge_port->shadowMCR;
1587 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1588 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1589 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1590 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1591 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1592 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1593
1594 return result;
1595 }
1596
1597 static int edge_get_icount(struct tty_struct *tty,
1598 struct serial_icounter_struct *icount)
1599 {
1600 struct usb_serial_port *port = tty->driver_data;
1601 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1602 struct async_icount cnow;
1603 cnow = edge_port->icount;
1604
1605 icount->cts = cnow.cts;
1606 icount->dsr = cnow.dsr;
1607 icount->rng = cnow.rng;
1608 icount->dcd = cnow.dcd;
1609 icount->rx = cnow.rx;
1610 icount->tx = cnow.tx;
1611 icount->frame = cnow.frame;
1612 icount->overrun = cnow.overrun;
1613 icount->parity = cnow.parity;
1614 icount->brk = cnow.brk;
1615 icount->buf_overrun = cnow.buf_overrun;
1616
1617 dev_dbg(&port->dev, "%s (%d) TIOCGICOUNT RX=%d, TX=%d\n", __func__,
1618 port->number, icount->rx, icount->tx);
1619 return 0;
1620 }
1621
1622 static int get_serial_info(struct edgeport_port *edge_port,
1623 struct serial_struct __user *retinfo)
1624 {
1625 struct serial_struct tmp;
1626
1627 if (!retinfo)
1628 return -EFAULT;
1629
1630 memset(&tmp, 0, sizeof(tmp));
1631
1632 tmp.type = PORT_16550A;
1633 tmp.line = edge_port->port->serial->minor;
1634 tmp.port = edge_port->port->number;
1635 tmp.irq = 0;
1636 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1637 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1638 tmp.baud_base = 9600;
1639 tmp.close_delay = 5*HZ;
1640 tmp.closing_wait = 30*HZ;
1641
1642 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1643 return -EFAULT;
1644 return 0;
1645 }
1646
1647
1648 /*****************************************************************************
1649 * SerialIoctl
1650 * this function handles any ioctl calls to the driver
1651 *****************************************************************************/
1652 static int edge_ioctl(struct tty_struct *tty,
1653 unsigned int cmd, unsigned long arg)
1654 {
1655 struct usb_serial_port *port = tty->driver_data;
1656 DEFINE_WAIT(wait);
1657 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1658 struct async_icount cnow;
1659 struct async_icount cprev;
1660
1661 dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
1662
1663 switch (cmd) {
1664 case TIOCSERGETLSR:
1665 dev_dbg(&port->dev, "%s (%d) TIOCSERGETLSR\n", __func__, port->number);
1666 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1667
1668 case TIOCGSERIAL:
1669 dev_dbg(&port->dev, "%s (%d) TIOCGSERIAL\n", __func__, port->number);
1670 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1671
1672 case TIOCMIWAIT:
1673 dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__, port->number);
1674 cprev = edge_port->icount;
1675 while (1) {
1676 prepare_to_wait(&edge_port->delta_msr_wait,
1677 &wait, TASK_INTERRUPTIBLE);
1678 schedule();
1679 finish_wait(&edge_port->delta_msr_wait, &wait);
1680 /* see if a signal did it */
1681 if (signal_pending(current))
1682 return -ERESTARTSYS;
1683 cnow = edge_port->icount;
1684 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1685 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1686 return -EIO; /* no change => error */
1687 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1688 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1689 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1690 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1691 return 0;
1692 }
1693 cprev = cnow;
1694 }
1695 /* NOTREACHED */
1696 break;
1697
1698 }
1699 return -ENOIOCTLCMD;
1700 }
1701
1702
1703 /*****************************************************************************
1704 * SerialBreak
1705 * this function sends a break to the port
1706 *****************************************************************************/
1707 static void edge_break(struct tty_struct *tty, int break_state)
1708 {
1709 struct usb_serial_port *port = tty->driver_data;
1710 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1711 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1712 int status;
1713
1714 if ((!edge_serial->is_epic) ||
1715 ((edge_serial->is_epic) &&
1716 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1717 /* flush and chase */
1718 edge_port->chaseResponsePending = true;
1719
1720 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1721 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1722 if (status == 0) {
1723 /* block until chase finished */
1724 block_until_chase_response(edge_port);
1725 } else {
1726 edge_port->chaseResponsePending = false;
1727 }
1728 }
1729
1730 if ((!edge_serial->is_epic) ||
1731 ((edge_serial->is_epic) &&
1732 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1733 if (break_state == -1) {
1734 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1735 status = send_iosp_ext_cmd(edge_port,
1736 IOSP_CMD_SET_BREAK, 0);
1737 } else {
1738 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1739 status = send_iosp_ext_cmd(edge_port,
1740 IOSP_CMD_CLEAR_BREAK, 0);
1741 }
1742 if (status)
1743 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1744 __func__);
1745 }
1746 }
1747
1748
1749 /*****************************************************************************
1750 * process_rcvd_data
1751 * this function handles the data received on the bulk in pipe.
1752 *****************************************************************************/
1753 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1754 unsigned char *buffer, __u16 bufferLength)
1755 {
1756 struct device *dev = &edge_serial->serial->dev->dev;
1757 struct usb_serial_port *port;
1758 struct edgeport_port *edge_port;
1759 struct tty_struct *tty;
1760 __u16 lastBufferLength;
1761 __u16 rxLen;
1762
1763 lastBufferLength = bufferLength + 1;
1764
1765 while (bufferLength > 0) {
1766 /* failsafe incase we get a message that we don't understand */
1767 if (lastBufferLength == bufferLength) {
1768 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1769 break;
1770 }
1771 lastBufferLength = bufferLength;
1772
1773 switch (edge_serial->rxState) {
1774 case EXPECT_HDR1:
1775 edge_serial->rxHeader1 = *buffer;
1776 ++buffer;
1777 --bufferLength;
1778
1779 if (bufferLength == 0) {
1780 edge_serial->rxState = EXPECT_HDR2;
1781 break;
1782 }
1783 /* otherwise, drop on through */
1784 case EXPECT_HDR2:
1785 edge_serial->rxHeader2 = *buffer;
1786 ++buffer;
1787 --bufferLength;
1788
1789 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1790 edge_serial->rxHeader1, edge_serial->rxHeader2);
1791 /* Process depending on whether this header is
1792 * data or status */
1793
1794 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1795 /* Decode this status header and go to
1796 * EXPECT_HDR1 (if we can process the status
1797 * with only 2 bytes), or go to EXPECT_HDR3 to
1798 * get the third byte. */
1799 edge_serial->rxPort =
1800 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1801 edge_serial->rxStatusCode =
1802 IOSP_GET_STATUS_CODE(
1803 edge_serial->rxHeader1);
1804
1805 if (!IOSP_STATUS_IS_2BYTE(
1806 edge_serial->rxStatusCode)) {
1807 /* This status needs additional bytes.
1808 * Save what we have and then wait for
1809 * more data.
1810 */
1811 edge_serial->rxStatusParam
1812 = edge_serial->rxHeader2;
1813 edge_serial->rxState = EXPECT_HDR3;
1814 break;
1815 }
1816 /* We have all the header bytes, process the
1817 status now */
1818 process_rcvd_status(edge_serial,
1819 edge_serial->rxHeader2, 0);
1820 edge_serial->rxState = EXPECT_HDR1;
1821 break;
1822 } else {
1823 edge_serial->rxPort =
1824 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1825 edge_serial->rxBytesRemaining =
1826 IOSP_GET_HDR_DATA_LEN(
1827 edge_serial->rxHeader1,
1828 edge_serial->rxHeader2);
1829 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1830 __func__,
1831 edge_serial->rxPort,
1832 edge_serial->rxBytesRemaining);
1833
1834 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1835 * ASSERT(DevExt->RxBytesRemaining <
1836 * IOSP_MAX_DATA_LENGTH);
1837 */
1838
1839 if (bufferLength == 0) {
1840 edge_serial->rxState = EXPECT_DATA;
1841 break;
1842 }
1843 /* Else, drop through */
1844 }
1845 case EXPECT_DATA: /* Expect data */
1846 if (bufferLength < edge_serial->rxBytesRemaining) {
1847 rxLen = bufferLength;
1848 /* Expect data to start next buffer */
1849 edge_serial->rxState = EXPECT_DATA;
1850 } else {
1851 /* BufLen >= RxBytesRemaining */
1852 rxLen = edge_serial->rxBytesRemaining;
1853 /* Start another header next time */
1854 edge_serial->rxState = EXPECT_HDR1;
1855 }
1856
1857 bufferLength -= rxLen;
1858 edge_serial->rxBytesRemaining -= rxLen;
1859
1860 /* spit this data back into the tty driver if this
1861 port is open */
1862 if (rxLen) {
1863 port = edge_serial->serial->port[
1864 edge_serial->rxPort];
1865 edge_port = usb_get_serial_port_data(port);
1866 if (edge_port->open) {
1867 tty = tty_port_tty_get(
1868 &edge_port->port->port);
1869 if (tty) {
1870 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1871 __func__, rxLen, edge_serial->rxPort);
1872 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1873 tty_kref_put(tty);
1874 }
1875 edge_port->icount.rx += rxLen;
1876 }
1877 buffer += rxLen;
1878 }
1879 break;
1880
1881 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1882 edge_serial->rxHeader3 = *buffer;
1883 ++buffer;
1884 --bufferLength;
1885
1886 /* We have all the header bytes, process the
1887 status now */
1888 process_rcvd_status(edge_serial,
1889 edge_serial->rxStatusParam,
1890 edge_serial->rxHeader3);
1891 edge_serial->rxState = EXPECT_HDR1;
1892 break;
1893 }
1894 }
1895 }
1896
1897
1898 /*****************************************************************************
1899 * process_rcvd_status
1900 * this function handles the any status messages received on the
1901 * bulk in pipe.
1902 *****************************************************************************/
1903 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1904 __u8 byte2, __u8 byte3)
1905 {
1906 struct usb_serial_port *port;
1907 struct edgeport_port *edge_port;
1908 struct tty_struct *tty;
1909 struct device *dev;
1910 __u8 code = edge_serial->rxStatusCode;
1911
1912 /* switch the port pointer to the one being currently talked about */
1913 port = edge_serial->serial->port[edge_serial->rxPort];
1914 edge_port = usb_get_serial_port_data(port);
1915 if (edge_port == NULL) {
1916 dev_err(&edge_serial->serial->dev->dev,
1917 "%s - edge_port == NULL for port %d\n",
1918 __func__, edge_serial->rxPort);
1919 return;
1920 }
1921 dev = &port->dev;
1922
1923 if (code == IOSP_EXT_STATUS) {
1924 switch (byte2) {
1925 case IOSP_EXT_STATUS_CHASE_RSP:
1926 /* we want to do EXT status regardless of port
1927 * open/closed */
1928 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1929 __func__, edge_serial->rxPort, byte3);
1930 /* Currently, the only EXT_STATUS is Chase, so process
1931 * here instead of one more call to one more subroutine
1932 * If/when more EXT_STATUS, there'll be more work to do
1933 * Also, we currently clear flag and close the port
1934 * regardless of content of above's Byte3.
1935 * We could choose to do something else when Byte3 says
1936 * Timeout on Chase from Edgeport, like wait longer in
1937 * block_until_chase_response, but for now we don't.
1938 */
1939 edge_port->chaseResponsePending = false;
1940 wake_up(&edge_port->wait_chase);
1941 return;
1942
1943 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1944 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1945 __func__, edge_serial->rxPort, byte3);
1946 /* Port->RxCheckRsp = true; */
1947 return;
1948 }
1949 }
1950
1951 if (code == IOSP_STATUS_OPEN_RSP) {
1952 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1953 edge_port->maxTxCredits = edge_port->txCredits;
1954 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1955 __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1956 handle_new_msr(edge_port, byte2);
1957
1958 /* send the current line settings to the port so we are
1959 in sync with any further termios calls */
1960 tty = tty_port_tty_get(&edge_port->port->port);
1961 if (tty) {
1962 change_port_settings(tty,
1963 edge_port, &tty->termios);
1964 tty_kref_put(tty);
1965 }
1966
1967 /* we have completed the open */
1968 edge_port->openPending = false;
1969 edge_port->open = true;
1970 wake_up(&edge_port->wait_open);
1971 return;
1972 }
1973
1974 /* If port is closed, silently discard all rcvd status. We can
1975 * have cases where buffered status is received AFTER the close
1976 * port command is sent to the Edgeport.
1977 */
1978 if (!edge_port->open || edge_port->closePending)
1979 return;
1980
1981 switch (code) {
1982 /* Not currently sent by Edgeport */
1983 case IOSP_STATUS_LSR:
1984 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1985 __func__, edge_serial->rxPort, byte2);
1986 handle_new_lsr(edge_port, false, byte2, 0);
1987 break;
1988
1989 case IOSP_STATUS_LSR_DATA:
1990 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1991 __func__, edge_serial->rxPort, byte2, byte3);
1992 /* byte2 is LSR Register */
1993 /* byte3 is broken data byte */
1994 handle_new_lsr(edge_port, true, byte2, byte3);
1995 break;
1996 /*
1997 * case IOSP_EXT_4_STATUS:
1998 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1999 * __func__, edge_serial->rxPort, byte2, byte3);
2000 * break;
2001 */
2002 case IOSP_STATUS_MSR:
2003 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
2004 __func__, edge_serial->rxPort, byte2);
2005 /*
2006 * Process this new modem status and generate appropriate
2007 * events, etc, based on the new status. This routine
2008 * also saves the MSR in Port->ShadowMsr.
2009 */
2010 handle_new_msr(edge_port, byte2);
2011 break;
2012
2013 default:
2014 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
2015 break;
2016 }
2017 }
2018
2019
2020 /*****************************************************************************
2021 * edge_tty_recv
2022 * this function passes data on to the tty flip buffer
2023 *****************************************************************************/
2024 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2025 unsigned char *data, int length)
2026 {
2027 int cnt;
2028
2029 cnt = tty_insert_flip_string(tty, data, length);
2030 if (cnt < length) {
2031 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2032 __func__, length - cnt);
2033 }
2034 data += cnt;
2035 length -= cnt;
2036
2037 tty_flip_buffer_push(tty);
2038 }
2039
2040
2041 /*****************************************************************************
2042 * handle_new_msr
2043 * this function handles any change to the msr register for a port.
2044 *****************************************************************************/
2045 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2046 {
2047 struct async_icount *icount;
2048
2049 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2050 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2051 icount = &edge_port->icount;
2052
2053 /* update input line counters */
2054 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2055 icount->cts++;
2056 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2057 icount->dsr++;
2058 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2059 icount->dcd++;
2060 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2061 icount->rng++;
2062 wake_up_interruptible(&edge_port->delta_msr_wait);
2063 }
2064
2065 /* Save the new modem status */
2066 edge_port->shadowMSR = newMsr & 0xf0;
2067 }
2068
2069
2070 /*****************************************************************************
2071 * handle_new_lsr
2072 * this function handles any change to the lsr register for a port.
2073 *****************************************************************************/
2074 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2075 __u8 lsr, __u8 data)
2076 {
2077 __u8 newLsr = (__u8) (lsr & (__u8)
2078 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2079 struct async_icount *icount;
2080
2081 edge_port->shadowLSR = lsr;
2082
2083 if (newLsr & LSR_BREAK) {
2084 /*
2085 * Parity and Framing errors only count if they
2086 * occur exclusive of a break being
2087 * received.
2088 */
2089 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2090 }
2091
2092 /* Place LSR data byte into Rx buffer */
2093 if (lsrData) {
2094 struct tty_struct *tty =
2095 tty_port_tty_get(&edge_port->port->port);
2096 if (tty) {
2097 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2098 tty_kref_put(tty);
2099 }
2100 }
2101 /* update input line counters */
2102 icount = &edge_port->icount;
2103 if (newLsr & LSR_BREAK)
2104 icount->brk++;
2105 if (newLsr & LSR_OVER_ERR)
2106 icount->overrun++;
2107 if (newLsr & LSR_PAR_ERR)
2108 icount->parity++;
2109 if (newLsr & LSR_FRM_ERR)
2110 icount->frame++;
2111 }
2112
2113
2114 /****************************************************************************
2115 * sram_write
2116 * writes a number of bytes to the Edgeport device's sram starting at the
2117 * given address.
2118 * If successful returns the number of bytes written, otherwise it returns
2119 * a negative error number of the problem.
2120 ****************************************************************************/
2121 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2122 __u16 length, const __u8 *data)
2123 {
2124 int result;
2125 __u16 current_length;
2126 unsigned char *transfer_buffer;
2127
2128 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2129
2130 transfer_buffer = kmalloc(64, GFP_KERNEL);
2131 if (!transfer_buffer) {
2132 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2133 __func__, 64);
2134 return -ENOMEM;
2135 }
2136
2137 /* need to split these writes up into 64 byte chunks */
2138 result = 0;
2139 while (length > 0) {
2140 if (length > 64)
2141 current_length = 64;
2142 else
2143 current_length = length;
2144
2145 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2146 memcpy(transfer_buffer, data, current_length);
2147 result = usb_control_msg(serial->dev,
2148 usb_sndctrlpipe(serial->dev, 0),
2149 USB_REQUEST_ION_WRITE_RAM,
2150 0x40, addr, extAddr, transfer_buffer,
2151 current_length, 300);
2152 if (result < 0)
2153 break;
2154 length -= current_length;
2155 addr += current_length;
2156 data += current_length;
2157 }
2158
2159 kfree(transfer_buffer);
2160 return result;
2161 }
2162
2163
2164 /****************************************************************************
2165 * rom_write
2166 * writes a number of bytes to the Edgeport device's ROM starting at the
2167 * given address.
2168 * If successful returns the number of bytes written, otherwise it returns
2169 * a negative error number of the problem.
2170 ****************************************************************************/
2171 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2172 __u16 length, const __u8 *data)
2173 {
2174 int result;
2175 __u16 current_length;
2176 unsigned char *transfer_buffer;
2177
2178 transfer_buffer = kmalloc(64, GFP_KERNEL);
2179 if (!transfer_buffer) {
2180 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2181 __func__, 64);
2182 return -ENOMEM;
2183 }
2184
2185 /* need to split these writes up into 64 byte chunks */
2186 result = 0;
2187 while (length > 0) {
2188 if (length > 64)
2189 current_length = 64;
2190 else
2191 current_length = length;
2192 memcpy(transfer_buffer, data, current_length);
2193 result = usb_control_msg(serial->dev,
2194 usb_sndctrlpipe(serial->dev, 0),
2195 USB_REQUEST_ION_WRITE_ROM, 0x40,
2196 addr, extAddr,
2197 transfer_buffer, current_length, 300);
2198 if (result < 0)
2199 break;
2200 length -= current_length;
2201 addr += current_length;
2202 data += current_length;
2203 }
2204
2205 kfree(transfer_buffer);
2206 return result;
2207 }
2208
2209
2210 /****************************************************************************
2211 * rom_read
2212 * reads a number of bytes from the Edgeport device starting at the given
2213 * address.
2214 * If successful returns the number of bytes read, otherwise it returns
2215 * a negative error number of the problem.
2216 ****************************************************************************/
2217 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2218 __u16 addr, __u16 length, __u8 *data)
2219 {
2220 int result;
2221 __u16 current_length;
2222 unsigned char *transfer_buffer;
2223
2224 transfer_buffer = kmalloc(64, GFP_KERNEL);
2225 if (!transfer_buffer) {
2226 dev_err(&serial->dev->dev,
2227 "%s - kmalloc(%d) failed.\n", __func__, 64);
2228 return -ENOMEM;
2229 }
2230
2231 /* need to split these reads up into 64 byte chunks */
2232 result = 0;
2233 while (length > 0) {
2234 if (length > 64)
2235 current_length = 64;
2236 else
2237 current_length = length;
2238 result = usb_control_msg(serial->dev,
2239 usb_rcvctrlpipe(serial->dev, 0),
2240 USB_REQUEST_ION_READ_ROM,
2241 0xC0, addr, extAddr, transfer_buffer,
2242 current_length, 300);
2243 if (result < 0)
2244 break;
2245 memcpy(data, transfer_buffer, current_length);
2246 length -= current_length;
2247 addr += current_length;
2248 data += current_length;
2249 }
2250
2251 kfree(transfer_buffer);
2252 return result;
2253 }
2254
2255
2256 /****************************************************************************
2257 * send_iosp_ext_cmd
2258 * Is used to send a IOSP message to the Edgeport device
2259 ****************************************************************************/
2260 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2261 __u8 command, __u8 param)
2262 {
2263 unsigned char *buffer;
2264 unsigned char *currentCommand;
2265 int length = 0;
2266 int status = 0;
2267
2268 buffer = kmalloc(10, GFP_ATOMIC);
2269 if (!buffer) {
2270 dev_err(&edge_port->port->dev,
2271 "%s - kmalloc(%d) failed.\n", __func__, 10);
2272 return -ENOMEM;
2273 }
2274
2275 currentCommand = buffer;
2276
2277 MAKE_CMD_EXT_CMD(&currentCommand, &length,
2278 edge_port->port->number - edge_port->port->serial->minor,
2279 command, param);
2280
2281 status = write_cmd_usb(edge_port, buffer, length);
2282 if (status) {
2283 /* something bad happened, let's free up the memory */
2284 kfree(buffer);
2285 }
2286
2287 return status;
2288 }
2289
2290
2291 /*****************************************************************************
2292 * write_cmd_usb
2293 * this function writes the given buffer out to the bulk write endpoint.
2294 *****************************************************************************/
2295 static int write_cmd_usb(struct edgeport_port *edge_port,
2296 unsigned char *buffer, int length)
2297 {
2298 struct edgeport_serial *edge_serial =
2299 usb_get_serial_data(edge_port->port->serial);
2300 struct device *dev = &edge_port->port->dev;
2301 int status = 0;
2302 struct urb *urb;
2303
2304 usb_serial_debug_data(dev, __func__, length, buffer);
2305
2306 /* Allocate our next urb */
2307 urb = usb_alloc_urb(0, GFP_ATOMIC);
2308 if (!urb)
2309 return -ENOMEM;
2310
2311 atomic_inc(&CmdUrbs);
2312 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2313 __func__, urb, atomic_read(&CmdUrbs));
2314
2315 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2316 usb_sndbulkpipe(edge_serial->serial->dev,
2317 edge_serial->bulk_out_endpoint),
2318 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2319
2320 edge_port->commandPending = true;
2321 status = usb_submit_urb(urb, GFP_ATOMIC);
2322
2323 if (status) {
2324 /* something went wrong */
2325 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2326 __func__, status);
2327 usb_kill_urb(urb);
2328 usb_free_urb(urb);
2329 atomic_dec(&CmdUrbs);
2330 return status;
2331 }
2332
2333 #if 0
2334 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2335
2336 if (edge_port->commandPending) {
2337 /* command timed out */
2338 dev_dbg(dev, "%s - command timed out\n", __func__);
2339 status = -EINVAL;
2340 }
2341 #endif
2342 return status;
2343 }
2344
2345
2346 /*****************************************************************************
2347 * send_cmd_write_baud_rate
2348 * this function sends the proper command to change the baud rate of the
2349 * specified port.
2350 *****************************************************************************/
2351 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2352 int baudRate)
2353 {
2354 struct edgeport_serial *edge_serial =
2355 usb_get_serial_data(edge_port->port->serial);
2356 struct device *dev = &edge_port->port->dev;
2357 unsigned char *cmdBuffer;
2358 unsigned char *currCmd;
2359 int cmdLen = 0;
2360 int divisor;
2361 int status;
2362 unsigned char number =
2363 edge_port->port->number - edge_port->port->serial->minor;
2364
2365 if (edge_serial->is_epic &&
2366 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2367 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d\n",
2368 edge_port->port->number, baudRate);
2369 return 0;
2370 }
2371
2372 dev_dbg(dev, "%s - port = %d, baud = %d\n", __func__,
2373 edge_port->port->number, baudRate);
2374
2375 status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2376 if (status) {
2377 dev_err(dev, "%s - bad baud rate\n", __func__);
2378 return status;
2379 }
2380
2381 /* Alloc memory for the string of commands. */
2382 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2383 if (!cmdBuffer) {
2384 dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2385 return -ENOMEM;
2386 }
2387 currCmd = cmdBuffer;
2388
2389 /* Enable access to divisor latch */
2390 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2391
2392 /* Write the divisor itself */
2393 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2394 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2395
2396 /* Restore original value to disable access to divisor latch */
2397 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2398 edge_port->shadowLCR);
2399
2400 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2401 if (status) {
2402 /* something bad happened, let's free up the memory */
2403 kfree(cmdBuffer);
2404 }
2405
2406 return status;
2407 }
2408
2409
2410 /*****************************************************************************
2411 * calc_baud_rate_divisor
2412 * this function calculates the proper baud rate divisor for the specified
2413 * baud rate.
2414 *****************************************************************************/
2415 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2416 {
2417 int i;
2418 __u16 custom;
2419
2420 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2421 if (divisor_table[i].BaudRate == baudrate) {
2422 *divisor = divisor_table[i].Divisor;
2423 return 0;
2424 }
2425 }
2426
2427 /* We have tried all of the standard baud rates
2428 * lets try to calculate the divisor for this baud rate
2429 * Make sure the baud rate is reasonable */
2430 if (baudrate > 50 && baudrate < 230400) {
2431 /* get divisor */
2432 custom = (__u16)((230400L + baudrate/2) / baudrate);
2433
2434 *divisor = custom;
2435
2436 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2437 return 0;
2438 }
2439
2440 return -1;
2441 }
2442
2443
2444 /*****************************************************************************
2445 * send_cmd_write_uart_register
2446 * this function builds up a uart register message and sends to the device.
2447 *****************************************************************************/
2448 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2449 __u8 regNum, __u8 regValue)
2450 {
2451 struct edgeport_serial *edge_serial =
2452 usb_get_serial_data(edge_port->port->serial);
2453 struct device *dev = &edge_port->port->dev;
2454 unsigned char *cmdBuffer;
2455 unsigned char *currCmd;
2456 unsigned long cmdLen = 0;
2457 int status;
2458
2459 dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2460 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2461
2462 if (edge_serial->is_epic &&
2463 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2464 regNum == MCR) {
2465 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2466 return 0;
2467 }
2468
2469 if (edge_serial->is_epic &&
2470 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2471 regNum == LCR) {
2472 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2473 return 0;
2474 }
2475
2476 /* Alloc memory for the string of commands. */
2477 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2478 if (cmdBuffer == NULL)
2479 return -ENOMEM;
2480
2481 currCmd = cmdBuffer;
2482
2483 /* Build a cmd in the buffer to write the given register */
2484 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2485 edge_port->port->number - edge_port->port->serial->minor,
2486 regNum, regValue);
2487
2488 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2489 if (status) {
2490 /* something bad happened, let's free up the memory */
2491 kfree(cmdBuffer);
2492 }
2493
2494 return status;
2495 }
2496
2497
2498 /*****************************************************************************
2499 * change_port_settings
2500 * This routine is called to set the UART on the device to match the
2501 * specified new settings.
2502 *****************************************************************************/
2503
2504 static void change_port_settings(struct tty_struct *tty,
2505 struct edgeport_port *edge_port, struct ktermios *old_termios)
2506 {
2507 struct device *dev = &edge_port->port->dev;
2508 struct edgeport_serial *edge_serial =
2509 usb_get_serial_data(edge_port->port->serial);
2510 int baud;
2511 unsigned cflag;
2512 __u8 mask = 0xff;
2513 __u8 lData;
2514 __u8 lParity;
2515 __u8 lStop;
2516 __u8 rxFlow;
2517 __u8 txFlow;
2518 int status;
2519
2520 dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
2521
2522 if (!edge_port->open &&
2523 !edge_port->openPending) {
2524 dev_dbg(dev, "%s - port not opened\n", __func__);
2525 return;
2526 }
2527
2528 cflag = tty->termios.c_cflag;
2529
2530 switch (cflag & CSIZE) {
2531 case CS5:
2532 lData = LCR_BITS_5; mask = 0x1f;
2533 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2534 break;
2535 case CS6:
2536 lData = LCR_BITS_6; mask = 0x3f;
2537 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2538 break;
2539 case CS7:
2540 lData = LCR_BITS_7; mask = 0x7f;
2541 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2542 break;
2543 default:
2544 case CS8:
2545 lData = LCR_BITS_8;
2546 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2547 break;
2548 }
2549
2550 lParity = LCR_PAR_NONE;
2551 if (cflag & PARENB) {
2552 if (cflag & CMSPAR) {
2553 if (cflag & PARODD) {
2554 lParity = LCR_PAR_MARK;
2555 dev_dbg(dev, "%s - parity = mark\n", __func__);
2556 } else {
2557 lParity = LCR_PAR_SPACE;
2558 dev_dbg(dev, "%s - parity = space\n", __func__);
2559 }
2560 } else if (cflag & PARODD) {
2561 lParity = LCR_PAR_ODD;
2562 dev_dbg(dev, "%s - parity = odd\n", __func__);
2563 } else {
2564 lParity = LCR_PAR_EVEN;
2565 dev_dbg(dev, "%s - parity = even\n", __func__);
2566 }
2567 } else {
2568 dev_dbg(dev, "%s - parity = none\n", __func__);
2569 }
2570
2571 if (cflag & CSTOPB) {
2572 lStop = LCR_STOP_2;
2573 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2574 } else {
2575 lStop = LCR_STOP_1;
2576 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2577 }
2578
2579 /* figure out the flow control settings */
2580 rxFlow = txFlow = 0x00;
2581 if (cflag & CRTSCTS) {
2582 rxFlow |= IOSP_RX_FLOW_RTS;
2583 txFlow |= IOSP_TX_FLOW_CTS;
2584 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2585 } else {
2586 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2587 }
2588
2589 /* if we are implementing XON/XOFF, set the start and stop character
2590 in the device */
2591 if (I_IXOFF(tty) || I_IXON(tty)) {
2592 unsigned char stop_char = STOP_CHAR(tty);
2593 unsigned char start_char = START_CHAR(tty);
2594
2595 if ((!edge_serial->is_epic) ||
2596 ((edge_serial->is_epic) &&
2597 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2598 send_iosp_ext_cmd(edge_port,
2599 IOSP_CMD_SET_XON_CHAR, start_char);
2600 send_iosp_ext_cmd(edge_port,
2601 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2602 }
2603
2604 /* if we are implementing INBOUND XON/XOFF */
2605 if (I_IXOFF(tty)) {
2606 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2607 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2608 __func__, start_char, stop_char);
2609 } else {
2610 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2611 }
2612
2613 /* if we are implementing OUTBOUND XON/XOFF */
2614 if (I_IXON(tty)) {
2615 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2616 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2617 __func__, start_char, stop_char);
2618 } else {
2619 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2620 }
2621 }
2622
2623 /* Set flow control to the configured value */
2624 if ((!edge_serial->is_epic) ||
2625 ((edge_serial->is_epic) &&
2626 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2627 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2628 if ((!edge_serial->is_epic) ||
2629 ((edge_serial->is_epic) &&
2630 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2631 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2632
2633
2634 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2635 edge_port->shadowLCR |= (lData | lParity | lStop);
2636
2637 edge_port->validDataMask = mask;
2638
2639 /* Send the updated LCR value to the EdgePort */
2640 status = send_cmd_write_uart_register(edge_port, LCR,
2641 edge_port->shadowLCR);
2642 if (status != 0)
2643 return;
2644
2645 /* set up the MCR register and send it to the EdgePort */
2646 edge_port->shadowMCR = MCR_MASTER_IE;
2647 if (cflag & CBAUD)
2648 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2649
2650 status = send_cmd_write_uart_register(edge_port, MCR,
2651 edge_port->shadowMCR);
2652 if (status != 0)
2653 return;
2654
2655 /* Determine divisor based on baud rate */
2656 baud = tty_get_baud_rate(tty);
2657 if (!baud) {
2658 /* pick a default, any default... */
2659 baud = 9600;
2660 }
2661
2662 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2663 status = send_cmd_write_baud_rate(edge_port, baud);
2664 if (status == -1) {
2665 /* Speed change was not possible - put back the old speed */
2666 baud = tty_termios_baud_rate(old_termios);
2667 tty_encode_baud_rate(tty, baud, baud);
2668 }
2669 }
2670
2671
2672 /****************************************************************************
2673 * unicode_to_ascii
2674 * Turns a string from Unicode into ASCII.
2675 * Doesn't do a good job with any characters that are outside the normal
2676 * ASCII range, but it's only for debugging...
2677 * NOTE: expects the unicode in LE format
2678 ****************************************************************************/
2679 static void unicode_to_ascii(char *string, int buflen,
2680 __le16 *unicode, int unicode_size)
2681 {
2682 int i;
2683
2684 if (buflen <= 0) /* never happens, but... */
2685 return;
2686 --buflen; /* space for nul */
2687
2688 for (i = 0; i < unicode_size; i++) {
2689 if (i >= buflen)
2690 break;
2691 string[i] = (char)(le16_to_cpu(unicode[i]));
2692 }
2693 string[i] = 0x00;
2694 }
2695
2696
2697 /****************************************************************************
2698 * get_manufacturing_desc
2699 * reads in the manufacturing descriptor and stores it into the serial
2700 * structure.
2701 ****************************************************************************/
2702 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2703 {
2704 struct device *dev = &edge_serial->serial->dev->dev;
2705 int response;
2706
2707 dev_dbg(dev, "getting manufacturer descriptor\n");
2708
2709 response = rom_read(edge_serial->serial,
2710 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2711 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2712 EDGE_MANUF_DESC_LEN,
2713 (__u8 *)(&edge_serial->manuf_descriptor));
2714
2715 if (response < 1)
2716 dev_err(dev, "error in getting manufacturer descriptor\n");
2717 else {
2718 char string[30];
2719 dev_dbg(dev, "**Manufacturer Descriptor\n");
2720 dev_dbg(dev, " RomSize: %dK\n",
2721 edge_serial->manuf_descriptor.RomSize);
2722 dev_dbg(dev, " RamSize: %dK\n",
2723 edge_serial->manuf_descriptor.RamSize);
2724 dev_dbg(dev, " CpuRev: %d\n",
2725 edge_serial->manuf_descriptor.CpuRev);
2726 dev_dbg(dev, " BoardRev: %d\n",
2727 edge_serial->manuf_descriptor.BoardRev);
2728 dev_dbg(dev, " NumPorts: %d\n",
2729 edge_serial->manuf_descriptor.NumPorts);
2730 dev_dbg(dev, " DescDate: %d/%d/%d\n",
2731 edge_serial->manuf_descriptor.DescDate[0],
2732 edge_serial->manuf_descriptor.DescDate[1],
2733 edge_serial->manuf_descriptor.DescDate[2]+1900);
2734 unicode_to_ascii(string, sizeof(string),
2735 edge_serial->manuf_descriptor.SerialNumber,
2736 edge_serial->manuf_descriptor.SerNumLength/2);
2737 dev_dbg(dev, " SerialNumber: %s\n", string);
2738 unicode_to_ascii(string, sizeof(string),
2739 edge_serial->manuf_descriptor.AssemblyNumber,
2740 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2741 dev_dbg(dev, " AssemblyNumber: %s\n", string);
2742 unicode_to_ascii(string, sizeof(string),
2743 edge_serial->manuf_descriptor.OemAssyNumber,
2744 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2745 dev_dbg(dev, " OemAssyNumber: %s\n", string);
2746 dev_dbg(dev, " UartType: %d\n",
2747 edge_serial->manuf_descriptor.UartType);
2748 dev_dbg(dev, " IonPid: %d\n",
2749 edge_serial->manuf_descriptor.IonPid);
2750 dev_dbg(dev, " IonConfig: %d\n",
2751 edge_serial->manuf_descriptor.IonConfig);
2752 }
2753 }
2754
2755
2756 /****************************************************************************
2757 * get_boot_desc
2758 * reads in the bootloader descriptor and stores it into the serial
2759 * structure.
2760 ****************************************************************************/
2761 static void get_boot_desc(struct edgeport_serial *edge_serial)
2762 {
2763 struct device *dev = &edge_serial->serial->dev->dev;
2764 int response;
2765
2766 dev_dbg(dev, "getting boot descriptor\n");
2767
2768 response = rom_read(edge_serial->serial,
2769 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2770 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2771 EDGE_BOOT_DESC_LEN,
2772 (__u8 *)(&edge_serial->boot_descriptor));
2773
2774 if (response < 1)
2775 dev_err(dev, "error in getting boot descriptor\n");
2776 else {
2777 dev_dbg(dev, "**Boot Descriptor:\n");
2778 dev_dbg(dev, " BootCodeLength: %d\n",
2779 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2780 dev_dbg(dev, " MajorVersion: %d\n",
2781 edge_serial->boot_descriptor.MajorVersion);
2782 dev_dbg(dev, " MinorVersion: %d\n",
2783 edge_serial->boot_descriptor.MinorVersion);
2784 dev_dbg(dev, " BuildNumber: %d\n",
2785 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2786 dev_dbg(dev, " Capabilities: 0x%x\n",
2787 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2788 dev_dbg(dev, " UConfig0: %d\n",
2789 edge_serial->boot_descriptor.UConfig0);
2790 dev_dbg(dev, " UConfig1: %d\n",
2791 edge_serial->boot_descriptor.UConfig1);
2792 }
2793 }
2794
2795
2796 /****************************************************************************
2797 * load_application_firmware
2798 * This is called to load the application firmware to the device
2799 ****************************************************************************/
2800 static void load_application_firmware(struct edgeport_serial *edge_serial)
2801 {
2802 struct device *dev = &edge_serial->serial->dev->dev;
2803 const struct ihex_binrec *rec;
2804 const struct firmware *fw;
2805 const char *fw_name;
2806 const char *fw_info;
2807 int response;
2808 __u32 Operaddr;
2809 __u16 build;
2810
2811 switch (edge_serial->product_info.iDownloadFile) {
2812 case EDGE_DOWNLOAD_FILE_I930:
2813 fw_info = "downloading firmware version (930)";
2814 fw_name = "edgeport/down.fw";
2815 break;
2816
2817 case EDGE_DOWNLOAD_FILE_80251:
2818 fw_info = "downloading firmware version (80251)";
2819 fw_name = "edgeport/down2.fw";
2820 break;
2821
2822 case EDGE_DOWNLOAD_FILE_NONE:
2823 dev_dbg(dev, "No download file specified, skipping download\n");
2824 return;
2825
2826 default:
2827 return;
2828 }
2829
2830 response = request_ihex_firmware(&fw, fw_name,
2831 &edge_serial->serial->dev->dev);
2832 if (response) {
2833 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2834 fw_name, response);
2835 return;
2836 }
2837
2838 rec = (const struct ihex_binrec *)fw->data;
2839 build = (rec->data[2] << 8) | rec->data[3];
2840
2841 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2842
2843 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2844 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2845 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2846
2847 for (rec = ihex_next_binrec(rec); rec;
2848 rec = ihex_next_binrec(rec)) {
2849 Operaddr = be32_to_cpu(rec->addr);
2850 response = sram_write(edge_serial->serial,
2851 Operaddr >> 16,
2852 Operaddr & 0xFFFF,
2853 be16_to_cpu(rec->len),
2854 &rec->data[0]);
2855 if (response < 0) {
2856 dev_err(&edge_serial->serial->dev->dev,
2857 "sram_write failed (%x, %x, %d)\n",
2858 Operaddr >> 16, Operaddr & 0xFFFF,
2859 be16_to_cpu(rec->len));
2860 break;
2861 }
2862 }
2863
2864 dev_dbg(dev, "sending exec_dl_code\n");
2865 response = usb_control_msg (edge_serial->serial->dev,
2866 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2867 USB_REQUEST_ION_EXEC_DL_CODE,
2868 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2869
2870 release_firmware(fw);
2871 }
2872
2873
2874 /****************************************************************************
2875 * edge_startup
2876 ****************************************************************************/
2877 static int edge_startup(struct usb_serial *serial)
2878 {
2879 struct edgeport_serial *edge_serial;
2880 struct usb_device *dev;
2881 struct device *ddev = &serial->dev->dev;
2882 int i;
2883 int response;
2884 bool interrupt_in_found;
2885 bool bulk_in_found;
2886 bool bulk_out_found;
2887 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2888 EDGE_COMPATIBILITY_MASK1,
2889 EDGE_COMPATIBILITY_MASK2 };
2890
2891 dev = serial->dev;
2892
2893 /* create our private serial structure */
2894 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2895 if (edge_serial == NULL) {
2896 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2897 return -ENOMEM;
2898 }
2899 spin_lock_init(&edge_serial->es_lock);
2900 edge_serial->serial = serial;
2901 usb_set_serial_data(serial, edge_serial);
2902
2903 /* get the name for the device from the device */
2904 i = usb_string(dev, dev->descriptor.iManufacturer,
2905 &edge_serial->name[0], MAX_NAME_LEN+1);
2906 if (i < 0)
2907 i = 0;
2908 edge_serial->name[i++] = ' ';
2909 usb_string(dev, dev->descriptor.iProduct,
2910 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2911
2912 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2913
2914 /* Read the epic descriptor */
2915 if (get_epic_descriptor(edge_serial) <= 0) {
2916 /* memcpy descriptor to Supports structures */
2917 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2918 sizeof(struct edge_compatibility_bits));
2919
2920 /* get the manufacturing descriptor for this device */
2921 get_manufacturing_desc(edge_serial);
2922
2923 /* get the boot descriptor */
2924 get_boot_desc(edge_serial);
2925
2926 get_product_info(edge_serial);
2927 }
2928
2929 /* set the number of ports from the manufacturing description */
2930 /* serial->num_ports = serial->product_info.NumPorts; */
2931 if ((!edge_serial->is_epic) &&
2932 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2933 dev_warn(ddev,
2934 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2935 edge_serial->product_info.NumPorts,
2936 serial->num_ports);
2937 }
2938
2939 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2940
2941 /* If not an EPiC device */
2942 if (!edge_serial->is_epic) {
2943 /* now load the application firmware into this device */
2944 load_application_firmware(edge_serial);
2945
2946 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2947
2948 /* Check current Edgeport EEPROM and update if necessary */
2949 update_edgeport_E2PROM(edge_serial);
2950
2951 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2952
2953 /* set the configuration to use #1 */
2954 /* dev_dbg(ddev, "set_configuration 1\n"); */
2955 /* usb_set_configuration (dev, 1); */
2956 }
2957 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n",
2958 edge_serial->product_info.FirmwareMajorVersion,
2959 edge_serial->product_info.FirmwareMinorVersion,
2960 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2961
2962 /* we set up the pointers to the endpoints in the edge_open function,
2963 * as the structures aren't created yet. */
2964
2965 response = 0;
2966
2967 if (edge_serial->is_epic) {
2968 /* EPIC thing, set up our interrupt polling now and our read
2969 * urb, so that the device knows it really is connected. */
2970 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2971 for (i = 0; i < serial->interface->altsetting[0]
2972 .desc.bNumEndpoints; ++i) {
2973 struct usb_endpoint_descriptor *endpoint;
2974 int buffer_size;
2975
2976 endpoint = &serial->interface->altsetting[0].
2977 endpoint[i].desc;
2978 buffer_size = usb_endpoint_maxp(endpoint);
2979 if (!interrupt_in_found &&
2980 (usb_endpoint_is_int_in(endpoint))) {
2981 /* we found a interrupt in endpoint */
2982 dev_dbg(ddev, "found interrupt in\n");
2983
2984 /* not set up yet, so do it now */
2985 edge_serial->interrupt_read_urb =
2986 usb_alloc_urb(0, GFP_KERNEL);
2987 if (!edge_serial->interrupt_read_urb) {
2988 dev_err(ddev, "out of memory\n");
2989 return -ENOMEM;
2990 }
2991 edge_serial->interrupt_in_buffer =
2992 kmalloc(buffer_size, GFP_KERNEL);
2993 if (!edge_serial->interrupt_in_buffer) {
2994 dev_err(ddev, "out of memory\n");
2995 usb_free_urb(edge_serial->interrupt_read_urb);
2996 return -ENOMEM;
2997 }
2998 edge_serial->interrupt_in_endpoint =
2999 endpoint->bEndpointAddress;
3000
3001 /* set up our interrupt urb */
3002 usb_fill_int_urb(
3003 edge_serial->interrupt_read_urb,
3004 dev,
3005 usb_rcvintpipe(dev,
3006 endpoint->bEndpointAddress),
3007 edge_serial->interrupt_in_buffer,
3008 buffer_size,
3009 edge_interrupt_callback,
3010 edge_serial,
3011 endpoint->bInterval);
3012
3013 interrupt_in_found = true;
3014 }
3015
3016 if (!bulk_in_found &&
3017 (usb_endpoint_is_bulk_in(endpoint))) {
3018 /* we found a bulk in endpoint */
3019 dev_dbg(ddev, "found bulk in\n");
3020
3021 /* not set up yet, so do it now */
3022 edge_serial->read_urb =
3023 usb_alloc_urb(0, GFP_KERNEL);
3024 if (!edge_serial->read_urb) {
3025 dev_err(ddev, "out of memory\n");
3026 return -ENOMEM;
3027 }
3028 edge_serial->bulk_in_buffer =
3029 kmalloc(buffer_size, GFP_KERNEL);
3030 if (!edge_serial->bulk_in_buffer) {
3031 dev_err(&dev->dev, "out of memory\n");
3032 usb_free_urb(edge_serial->read_urb);
3033 return -ENOMEM;
3034 }
3035 edge_serial->bulk_in_endpoint =
3036 endpoint->bEndpointAddress;
3037
3038 /* set up our bulk in urb */
3039 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3040 usb_rcvbulkpipe(dev,
3041 endpoint->bEndpointAddress),
3042 edge_serial->bulk_in_buffer,
3043 usb_endpoint_maxp(endpoint),
3044 edge_bulk_in_callback,
3045 edge_serial);
3046 bulk_in_found = true;
3047 }
3048
3049 if (!bulk_out_found &&
3050 (usb_endpoint_is_bulk_out(endpoint))) {
3051 /* we found a bulk out endpoint */
3052 dev_dbg(ddev, "found bulk out\n");
3053 edge_serial->bulk_out_endpoint =
3054 endpoint->bEndpointAddress;
3055 bulk_out_found = true;
3056 }
3057 }
3058
3059 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3060 dev_err(ddev, "Error - the proper endpoints were not found!\n");
3061 return -ENODEV;
3062 }
3063
3064 /* start interrupt read for this edgeport this interrupt will
3065 * continue as long as the edgeport is connected */
3066 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3067 GFP_KERNEL);
3068 if (response)
3069 dev_err(ddev, "%s - Error %d submitting control urb\n",
3070 __func__, response);
3071 }
3072 return response;
3073 }
3074
3075
3076 /****************************************************************************
3077 * edge_disconnect
3078 * This function is called whenever the device is removed from the usb bus.
3079 ****************************************************************************/
3080 static void edge_disconnect(struct usb_serial *serial)
3081 {
3082 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3083
3084 /* stop reads and writes on all ports */
3085 /* free up our endpoint stuff */
3086 if (edge_serial->is_epic) {
3087 usb_kill_urb(edge_serial->interrupt_read_urb);
3088 usb_free_urb(edge_serial->interrupt_read_urb);
3089 kfree(edge_serial->interrupt_in_buffer);
3090
3091 usb_kill_urb(edge_serial->read_urb);
3092 usb_free_urb(edge_serial->read_urb);
3093 kfree(edge_serial->bulk_in_buffer);
3094 }
3095 }
3096
3097
3098 /****************************************************************************
3099 * edge_release
3100 * This function is called when the device structure is deallocated.
3101 ****************************************************************************/
3102 static void edge_release(struct usb_serial *serial)
3103 {
3104 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3105
3106 kfree(edge_serial);
3107 }
3108
3109 static int edge_port_probe(struct usb_serial_port *port)
3110 {
3111 struct edgeport_port *edge_port;
3112
3113 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3114 if (!edge_port)
3115 return -ENOMEM;
3116
3117 spin_lock_init(&edge_port->ep_lock);
3118 edge_port->port = port;
3119
3120 usb_set_serial_port_data(port, edge_port);
3121
3122 return 0;
3123 }
3124
3125 static int edge_port_remove(struct usb_serial_port *port)
3126 {
3127 struct edgeport_port *edge_port;
3128
3129 edge_port = usb_get_serial_port_data(port);
3130 kfree(edge_port);
3131
3132 return 0;
3133 }
3134
3135 module_usb_serial_driver(serial_drivers, id_table_combined);
3136
3137 MODULE_AUTHOR(DRIVER_AUTHOR);
3138 MODULE_DESCRIPTION(DRIVER_DESC);
3139 MODULE_LICENSE("GPL");
3140 MODULE_FIRMWARE("edgeport/boot.fw");
3141 MODULE_FIRMWARE("edgeport/boot2.fw");
3142 MODULE_FIRMWARE("edgeport/down.fw");
3143 MODULE_FIRMWARE("edgeport/down2.fw");
Linux kernel - Deliverables
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