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tifm_sd: separate command flags, socket flags and register bit masks
[linux-2.6/kvm.git] / drivers / usb / serial / io_edgeport.c
blob18f74ac7656565ff1ba3607a5ce0155a08ea729f
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 <asm/uaccess.h>
46 #include <linux/usb.h>
47 #include <linux/usb/serial.h>
48 #include "io_edgeport.h"
49 #include "io_ionsp.h" /* info for the iosp messages */
50 #include "io_16654.h" /* 16654 UART defines */
51
52 /*
53 * Version Information
54 */
55 #define DRIVER_VERSION "v2.7"
56 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
57 #define DRIVER_DESC "Edgeport USB Serial Driver"
58
59 /* First, the latest boot code - for first generation edgeports */
60 #define IMAGE_ARRAY_NAME BootCodeImage_GEN1
61 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1
62 #include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */
63
64 /* for second generation edgeports */
65 #define IMAGE_ARRAY_NAME BootCodeImage_GEN2
66 #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2
67 #include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */
68
69 /* Then finally the main run-time operational code - for first generation edgeports */
70 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1
71 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1
72 #include "io_fw_down.h" /* Define array OperationalCodeImage[] */
73
74 /* for second generation edgeports */
75 #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2
76 #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2
77 #include "io_fw_down2.h" /* Define array OperationalCodeImage[] */
78
79 #define MAX_NAME_LEN 64
80
81 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
82 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
83 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
84
85 /* receive port state */
86 enum RXSTATE {
87 EXPECT_HDR1 = 0, /* Expect header byte 1 */
88 EXPECT_HDR2 = 1, /* Expect header byte 2 */
89 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
90 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
91 };
92
93
94 /* Transmit Fifo
95 * This Transmit queue is an extension of the edgeport Rx buffer.
96 * The maximum amount of data buffered in both the edgeport
97 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
98 */
99 struct TxFifo {
100 unsigned int head; /* index to head pointer (write) */
101 unsigned int tail; /* index to tail pointer (read) */
102 unsigned int count; /* Bytes in queue */
103 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
104 unsigned char *fifo; /* allocated Buffer */
105 };
106
107 /* This structure holds all of the local port information */
108 struct edgeport_port {
109 __u16 txCredits; /* our current credits for this port */
110 __u16 maxTxCredits; /* the max size of the port */
111
112 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
113 struct urb *write_urb; /* write URB for this port */
114 bool write_in_progress; /* 'true' while a write URB is outstanding */
115 spinlock_t ep_lock;
116
117 __u8 shadowLCR; /* last LCR value received */
118 __u8 shadowMCR; /* last MCR value received */
119 __u8 shadowMSR; /* last MSR value received */
120 __u8 shadowLSR; /* last LSR value received */
121 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
122 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
123 __u8 validDataMask;
124 __u32 baudRate;
125
126 bool open;
127 bool openPending;
128 bool commandPending;
129 bool closePending;
130 bool chaseResponsePending;
131
132 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
133 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
134 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
135 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
136
137 struct async_icount icount;
138 struct usb_serial_port *port; /* loop back to the owner of this object */
139 };
140
141
142 /* This structure holds all of the individual device information */
143 struct edgeport_serial {
144 char name[MAX_NAME_LEN+2]; /* string name of this device */
145
146 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
147 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
148 struct edgeport_product_info product_info; /* Product Info */
149 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
150 int is_epic; /* flag if EPiC device or not */
151
152 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
153 unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
154 struct urb * interrupt_read_urb; /* our interrupt urb */
155
156 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
157 unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
158 struct urb * read_urb; /* our bulk read urb */
159 bool read_in_progress;
160 spinlock_t es_lock;
161
162 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
163
164 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
165
166 enum RXSTATE rxState; /* the current state of the bulk receive processor */
167 __u8 rxHeader1; /* receive header byte 1 */
168 __u8 rxHeader2; /* receive header byte 2 */
169 __u8 rxHeader3; /* receive header byte 3 */
170 __u8 rxPort; /* the port that we are currently receiving data for */
171 __u8 rxStatusCode; /* the receive status code */
172 __u8 rxStatusParam; /* the receive status paramater */
173 __s16 rxBytesRemaining; /* the number of port bytes left to read */
174 struct usb_serial *serial; /* loop back to the owner of this object */
175 };
176
177 /* baud rate information */
178 struct divisor_table_entry {
179 __u32 BaudRate;
180 __u16 Divisor;
181 };
182
183 //
184 // Define table of divisors for Rev A EdgePort/4 hardware
185 // These assume a 3.6864MHz crystal, the standard /16, and
186 // MCR.7 = 0.
187 //
188 static const struct divisor_table_entry divisor_table[] = {
189 { 50, 4608},
190 { 75, 3072},
191 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
192 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
193 { 150, 1536},
194 { 300, 768},
195 { 600, 384},
196 { 1200, 192},
197 { 1800, 128},
198 { 2400, 96},
199 { 4800, 48},
200 { 7200, 32},
201 { 9600, 24},
202 { 14400, 16},
203 { 19200, 12},
204 { 38400, 6},
205 { 57600, 4},
206 { 115200, 2},
207 { 230400, 1},
208 };
209
210 /* local variables */
211 static int debug;
212
213 static int low_latency = 1; /* tty low latency flag, on by default */
214
215 static atomic_t CmdUrbs; /* Number of outstanding Command Write Urbs */
216
217
218 /* local function prototypes */
219
220 /* function prototypes for all URB callbacks */
221 static void edge_interrupt_callback (struct urb *urb);
222 static void edge_bulk_in_callback (struct urb *urb);
223 static void edge_bulk_out_data_callback (struct urb *urb);
224 static void edge_bulk_out_cmd_callback (struct urb *urb);
225
226 /* function prototypes for the usbserial callbacks */
227 static int edge_open (struct usb_serial_port *port, struct file *filp);
228 static void edge_close (struct usb_serial_port *port, struct file *filp);
229 static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count);
230 static int edge_write_room (struct usb_serial_port *port);
231 static int edge_chars_in_buffer (struct usb_serial_port *port);
232 static void edge_throttle (struct usb_serial_port *port);
233 static void edge_unthrottle (struct usb_serial_port *port);
234 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios);
235 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
236 static void edge_break (struct usb_serial_port *port, int break_state);
237 static int edge_tiocmget (struct usb_serial_port *port, struct file *file);
238 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
239 static int edge_startup (struct usb_serial *serial);
240 static void edge_shutdown (struct usb_serial *serial);
241
242
243 #include "io_tables.h" /* all of the devices that this driver supports */
244
245 /* function prototypes for all of our local functions */
246 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
247 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
248 static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
249 static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr);
250 static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
251 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param);
252 static int calc_baud_rate_divisor (int baud_rate, int *divisor);
253 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate);
254 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios);
255 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
256 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
257 static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
258
259 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
260 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
261 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
262 static void get_manufacturing_desc (struct edgeport_serial *edge_serial);
263 static void get_boot_desc (struct edgeport_serial *edge_serial);
264 static void load_application_firmware (struct edgeport_serial *edge_serial);
265
266 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size);
267
268
269 // ************************************************************************
270 // ************************************************************************
271 // ************************************************************************
272 // ************************************************************************
273
274 /************************************************************************
275 * *
276 * update_edgeport_E2PROM() Compare current versions of *
277 * Boot ROM and Manufacture *
278 * Descriptors with versions *
279 * embedded in this driver *
280 * *
281 ************************************************************************/
282 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
283 {
284 __u32 BootCurVer;
285 __u32 BootNewVer;
286 __u8 BootMajorVersion;
287 __u8 BootMinorVersion;
288 __le16 BootBuildNumber;
289 __u8 *BootImage;
290 __u32 BootSize;
291 struct edge_firmware_image_record *record;
292 unsigned char *firmware;
293 int response;
294
295
296 switch (edge_serial->product_info.iDownloadFile) {
297 case EDGE_DOWNLOAD_FILE_I930:
298 BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion;
299 BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion;
300 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber);
301 BootImage = &BootCodeImage_GEN1[0];
302 BootSize = sizeof( BootCodeImage_GEN1 );
303 break;
304
305 case EDGE_DOWNLOAD_FILE_80251:
306 BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion;
307 BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion;
308 BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber);
309 BootImage = &BootCodeImage_GEN2[0];
310 BootSize = sizeof( BootCodeImage_GEN2 );
311 break;
312
313 default:
314 return;
315 }
316
317 // Check Boot Image Version
318 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
319 (edge_serial->boot_descriptor.MinorVersion << 16) +
320 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
321
322 BootNewVer = (BootMajorVersion << 24) +
323 (BootMinorVersion << 16) +
324 le16_to_cpu(BootBuildNumber);
325
326 dbg("Current Boot Image version %d.%d.%d",
327 edge_serial->boot_descriptor.MajorVersion,
328 edge_serial->boot_descriptor.MinorVersion,
329 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
330
331
332 if (BootNewVer > BootCurVer) {
333 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
334 edge_serial->boot_descriptor.MajorVersion,
335 edge_serial->boot_descriptor.MinorVersion,
336 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
337 BootMajorVersion,
338 BootMinorVersion,
339 le16_to_cpu(BootBuildNumber));
340
341
342 dbg("Downloading new Boot Image");
343
344 firmware = BootImage;
345
346 for (;;) {
347 record = (struct edge_firmware_image_record *)firmware;
348 response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
349 if (response < 0) {
350 dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
351 break;
352 }
353 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
354 if (firmware >= &BootImage[BootSize]) {
355 break;
356 }
357 }
358 } else {
359 dbg("Boot Image -- already up to date");
360 }
361 }
362
363
364 /************************************************************************
365 * *
366 * Get string descriptor from device *
367 * *
368 ************************************************************************/
369 static int get_string (struct usb_device *dev, int Id, char *string, int buflen)
370 {
371 struct usb_string_descriptor StringDesc;
372 struct usb_string_descriptor *pStringDesc;
373
374 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
375
376 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
377 return 0;
378 }
379
380 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
381
382 if (!pStringDesc) {
383 return 0;
384 }
385
386 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
387 kfree(pStringDesc);
388 return 0;
389 }
390
391 unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2);
392
393 kfree(pStringDesc);
394 dbg("%s - USB String %s", __FUNCTION__, string);
395 return strlen(string);
396 }
397
398
399 #if 0
400 /************************************************************************
401 *
402 * Get string descriptor from device
403 *
404 ************************************************************************/
405 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
406 {
407 struct usb_string_descriptor StringDesc;
408 struct usb_string_descriptor *pStringDesc;
409
410 dbg("%s - USB String ID = %d", __FUNCTION__, Id );
411
412 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
413 return 0;
414 }
415
416 pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
417
418 if (!pStringDesc) {
419 return -1;
420 }
421
422 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
423 kfree(pStringDesc);
424 return -1;
425 }
426
427 *pRetDesc = pStringDesc;
428 return 0;
429 }
430 #endif
431
432 static void dump_product_info(struct edgeport_product_info *product_info)
433 {
434 // Dump Product Info structure
435 dbg("**Product Information:");
436 dbg(" ProductId %x", product_info->ProductId );
437 dbg(" NumPorts %d", product_info->NumPorts );
438 dbg(" ProdInfoVer %d", product_info->ProdInfoVer );
439 dbg(" IsServer %d", product_info->IsServer);
440 dbg(" IsRS232 %d", product_info->IsRS232 );
441 dbg(" IsRS422 %d", product_info->IsRS422 );
442 dbg(" IsRS485 %d", product_info->IsRS485 );
443 dbg(" RomSize %d", product_info->RomSize );
444 dbg(" RamSize %d", product_info->RamSize );
445 dbg(" CpuRev %x", product_info->CpuRev );
446 dbg(" BoardRev %x", product_info->BoardRev);
447 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
448 product_info->BootMinorVersion,
449 le16_to_cpu(product_info->BootBuildNumber));
450 dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion,
451 product_info->FirmwareMinorVersion,
452 le16_to_cpu(product_info->FirmwareBuildNumber));
453 dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0],
454 product_info->ManufactureDescDate[1],
455 product_info->ManufactureDescDate[2]+1900);
456 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
457 dbg(" EpicVer %d", product_info->EpicVer);
458 }
459
460 static void get_product_info(struct edgeport_serial *edge_serial)
461 {
462 struct edgeport_product_info *product_info = &edge_serial->product_info;
463
464 memset (product_info, 0, sizeof(struct edgeport_product_info));
465
466 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
467 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
468 product_info->ProdInfoVer = 0;
469
470 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
471 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
472 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
473 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
474
475 product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion;
476 product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion;
477 product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber;
478
479 memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
480
481 // check if this is 2nd generation hardware
482 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
483 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion;
484 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion;
485 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber);
486 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
487 } else {
488 product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion;
489 product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion;
490 product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber);
491 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
492 }
493
494 // Determine Product type and set appropriate flags
495 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
496 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
497 case ION_DEVICE_ID_EDGEPORT_4T:
498 case ION_DEVICE_ID_EDGEPORT_4:
499 case ION_DEVICE_ID_EDGEPORT_2:
500 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
501 case ION_DEVICE_ID_EDGEPORT_8:
502 case ION_DEVICE_ID_EDGEPORT_421:
503 case ION_DEVICE_ID_EDGEPORT_21:
504 case ION_DEVICE_ID_EDGEPORT_2_DIN:
505 case ION_DEVICE_ID_EDGEPORT_4_DIN:
506 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
507 product_info->IsRS232 = 1;
508 break;
509
510 case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485
511 product_info->IsRS422 = 1;
512 product_info->IsRS485 = 1;
513 break;
514
515 case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422
516 case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422
517 product_info->IsRS422 = 1;
518 break;
519 }
520
521 dump_product_info(product_info);
522 }
523
524 static int get_epic_descriptor(struct edgeport_serial *ep)
525 {
526 int result;
527 struct usb_serial *serial = ep->serial;
528 struct edgeport_product_info *product_info = &ep->product_info;
529 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
530 struct edge_compatibility_bits *bits;
531
532 ep->is_epic = 0;
533 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
534 USB_REQUEST_ION_GET_EPIC_DESC,
535 0xC0, 0x00, 0x00,
536 &ep->epic_descriptor,
537 sizeof(struct edge_compatibility_descriptor),
538 300);
539
540 dbg("%s result = %d", __FUNCTION__, result);
541
542 if (result > 0) {
543 ep->is_epic = 1;
544 memset(product_info, 0, sizeof(struct edgeport_product_info));
545
546 product_info->NumPorts = epic->NumPorts;
547 product_info->ProdInfoVer = 0;
548 product_info->FirmwareMajorVersion = epic->MajorVersion;
549 product_info->FirmwareMinorVersion = epic->MinorVersion;
550 product_info->FirmwareBuildNumber = epic->BuildNumber;
551 product_info->iDownloadFile = epic->iDownloadFile;
552 product_info->EpicVer = epic->EpicVer;
553 product_info->Epic = epic->Supports;
554 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
555 dump_product_info(product_info);
556
557 bits = &ep->epic_descriptor.Supports;
558 dbg("**EPIC descriptor:");
559 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE");
560 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE" );
561 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE" );
562 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE" );
563 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE" );
564 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE" );
565 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE" );
566 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE" );
567 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE" );
568 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE" );
569 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE" );
570 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE" );
571 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE" );
572 }
573
574 return result;
575 }
576
577
578 /************************************************************************/
579 /************************************************************************/
580 /* U S B C A L L B A C K F U N C T I O N S */
581 /* U S B C A L L B A C K F U N C T I O N S */
582 /************************************************************************/
583 /************************************************************************/
584
585 /*****************************************************************************
586 * edge_interrupt_callback
587 * this is the callback function for when we have received data on the
588 * interrupt endpoint.
589 *****************************************************************************/
590 static void edge_interrupt_callback (struct urb *urb)
591 {
592 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
593 struct edgeport_port *edge_port;
594 struct usb_serial_port *port;
595 unsigned char *data = urb->transfer_buffer;
596 int length = urb->actual_length;
597 int bytes_avail;
598 int position;
599 int txCredits;
600 int portNumber;
601 int result;
602
603 dbg("%s", __FUNCTION__);
604
605 switch (urb->status) {
606 case 0:
607 /* success */
608 break;
609 case -ECONNRESET:
610 case -ENOENT:
611 case -ESHUTDOWN:
612 /* this urb is terminated, clean up */
613 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
614 return;
615 default:
616 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
617 goto exit;
618 }
619
620 // process this interrupt-read even if there are no ports open
621 if (length) {
622 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
623
624 if (length > 1) {
625 bytes_avail = data[0] | (data[1] << 8);
626 if (bytes_avail) {
627 spin_lock(&edge_serial->es_lock);
628 edge_serial->rxBytesAvail += bytes_avail;
629 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
630
631 if (edge_serial->rxBytesAvail > 0 &&
632 !edge_serial->read_in_progress) {
633 dbg("%s - posting a read", __FUNCTION__);
634 edge_serial->read_in_progress = true;
635
636 /* we have pending bytes on the bulk in pipe, send a request */
637 edge_serial->read_urb->dev = edge_serial->serial->dev;
638 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
639 if (result) {
640 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result);
641 edge_serial->read_in_progress = false;
642 }
643 }
644 spin_unlock(&edge_serial->es_lock);
645 }
646 }
647 /* grab the txcredits for the ports if available */
648 position = 2;
649 portNumber = 0;
650 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
651 txCredits = data[position] | (data[position+1] << 8);
652 if (txCredits) {
653 port = edge_serial->serial->port[portNumber];
654 edge_port = usb_get_serial_port_data(port);
655 if (edge_port->open) {
656 spin_lock(&edge_port->ep_lock);
657 edge_port->txCredits += txCredits;
658 spin_unlock(&edge_port->ep_lock);
659 dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits);
660
661 /* tell the tty driver that something has changed */
662 if (edge_port->port->tty)
663 tty_wakeup(edge_port->port->tty);
664
665 // Since we have more credit, check if more data can be sent
666 send_more_port_data(edge_serial, edge_port);
667 }
668 }
669 position += 2;
670 ++portNumber;
671 }
672 }
673
674 exit:
675 result = usb_submit_urb (urb, GFP_ATOMIC);
676 if (result) {
677 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
678 }
679 }
680
681
682 /*****************************************************************************
683 * edge_bulk_in_callback
684 * this is the callback function for when we have received data on the
685 * bulk in endpoint.
686 *****************************************************************************/
687 static void edge_bulk_in_callback (struct urb *urb)
688 {
689 struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
690 unsigned char *data = urb->transfer_buffer;
691 int status;
692 __u16 raw_data_length;
693
694 dbg("%s", __FUNCTION__);
695
696 if (urb->status) {
697 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
698 edge_serial->read_in_progress = false;
699 return;
700 }
701
702 if (urb->actual_length == 0) {
703 dbg("%s - read bulk callback with no data", __FUNCTION__);
704 edge_serial->read_in_progress = false;
705 return;
706 }
707
708 raw_data_length = urb->actual_length;
709
710 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data);
711
712 spin_lock(&edge_serial->es_lock);
713
714 /* decrement our rxBytes available by the number that we just got */
715 edge_serial->rxBytesAvail -= raw_data_length;
716
717 dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail);
718
719 process_rcvd_data (edge_serial, data, urb->actual_length);
720
721 /* check to see if there's any more data for us to read */
722 if (edge_serial->rxBytesAvail > 0) {
723 dbg("%s - posting a read", __FUNCTION__);
724 edge_serial->read_urb->dev = edge_serial->serial->dev;
725 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
726 if (status) {
727 dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status);
728 edge_serial->read_in_progress = false;
729 }
730 } else {
731 edge_serial->read_in_progress = false;
732 }
733
734 spin_unlock(&edge_serial->es_lock);
735 }
736
737
738 /*****************************************************************************
739 * edge_bulk_out_data_callback
740 * this is the callback function for when we have finished sending serial data
741 * on the bulk out endpoint.
742 *****************************************************************************/
743 static void edge_bulk_out_data_callback (struct urb *urb)
744 {
745 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
746 struct tty_struct *tty;
747
748 dbg("%s", __FUNCTION__);
749
750 if (urb->status) {
751 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
752 }
753
754 tty = edge_port->port->tty;
755
756 if (tty && edge_port->open) {
757 /* let the tty driver wakeup if it has a special write_wakeup function */
758 tty_wakeup(tty);
759 }
760
761 // Release the Write URB
762 edge_port->write_in_progress = false;
763
764 // Check if more data needs to be sent
765 send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
766 }
767
768
769 /*****************************************************************************
770 * BulkOutCmdCallback
771 * this is the callback function for when we have finished sending a command
772 * on the bulk out endpoint.
773 *****************************************************************************/
774 static void edge_bulk_out_cmd_callback (struct urb *urb)
775 {
776 struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
777 struct tty_struct *tty;
778 int status = urb->status;
779
780 dbg("%s", __FUNCTION__);
781
782 atomic_dec(&CmdUrbs);
783 dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, atomic_read(&CmdUrbs));
784
785
786 /* clean up the transfer buffer */
787 kfree(urb->transfer_buffer);
788
789 /* Free the command urb */
790 usb_free_urb (urb);
791
792 if (status) {
793 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
794 return;
795 }
796
797 /* Get pointer to tty */
798 tty = edge_port->port->tty;
799
800 /* tell the tty driver that something has changed */
801 if (tty && edge_port->open)
802 tty_wakeup(tty);
803
804 /* we have completed the command */
805 edge_port->commandPending = false;
806 wake_up(&edge_port->wait_command);
807 }
808
809
810 /*****************************************************************************
811 * Driver tty interface functions
812 *****************************************************************************/
813
814 /*****************************************************************************
815 * SerialOpen
816 * this function is called by the tty driver when a port is opened
817 * If successful, we return 0
818 * Otherwise we return a negative error number.
819 *****************************************************************************/
820 static int edge_open (struct usb_serial_port *port, struct file * filp)
821 {
822 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
823 struct usb_serial *serial;
824 struct edgeport_serial *edge_serial;
825 int response;
826
827 dbg("%s - port %d", __FUNCTION__, port->number);
828
829 if (edge_port == NULL)
830 return -ENODEV;
831
832 if (port->tty)
833 port->tty->low_latency = low_latency;
834
835 /* see if we've set up our endpoint info yet (can't set it up in edge_startup
836 as the structures were not set up at that time.) */
837 serial = port->serial;
838 edge_serial = usb_get_serial_data(serial);
839 if (edge_serial == NULL) {
840 return -ENODEV;
841 }
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 = port0->interrupt_in_buffer;
847 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
848 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
849 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
850 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
851 edge_serial->read_urb = port0->read_urb;
852 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
853
854 /* set up our interrupt urb */
855 usb_fill_int_urb(edge_serial->interrupt_read_urb,
856 serial->dev,
857 usb_rcvintpipe(serial->dev,
858 port0->interrupt_in_endpointAddress),
859 port0->interrupt_in_buffer,
860 edge_serial->interrupt_read_urb->transfer_buffer_length,
861 edge_interrupt_callback, edge_serial,
862 edge_serial->interrupt_read_urb->interval);
863
864 /* set up our bulk in urb */
865 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
866 usb_rcvbulkpipe(serial->dev,
867 port0->bulk_in_endpointAddress),
868 port0->bulk_in_buffer,
869 edge_serial->read_urb->transfer_buffer_length,
870 edge_bulk_in_callback, edge_serial);
871 edge_serial->read_in_progress = false;
872
873 /* start interrupt read for this edgeport
874 * this interrupt will continue as long as the edgeport is connected */
875 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
876 if (response) {
877 dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
878 }
879 }
880
881 /* initialize our wait queues */
882 init_waitqueue_head(&edge_port->wait_open);
883 init_waitqueue_head(&edge_port->wait_chase);
884 init_waitqueue_head(&edge_port->delta_msr_wait);
885 init_waitqueue_head(&edge_port->wait_command);
886
887 /* initialize our icount structure */
888 memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
889
890 /* initialize our port settings */
891 edge_port->txCredits = 0; /* Can't send any data yet */
892 edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */
893 edge_port->chaseResponsePending = false;
894
895 /* send a open port command */
896 edge_port->openPending = true;
897 edge_port->open = false;
898 response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
899
900 if (response < 0) {
901 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
902 edge_port->openPending = false;
903 return -ENODEV;
904 }
905
906 /* now wait for the port to be completely opened */
907 wait_event_timeout(edge_port->wait_open, !edge_port->openPending, OPEN_TIMEOUT);
908
909 if (!edge_port->open) {
910 /* open timed out */
911 dbg("%s - open timedout", __FUNCTION__);
912 edge_port->openPending = false;
913 return -ENODEV;
914 }
915
916 /* create the txfifo */
917 edge_port->txfifo.head = 0;
918 edge_port->txfifo.tail = 0;
919 edge_port->txfifo.count = 0;
920 edge_port->txfifo.size = edge_port->maxTxCredits;
921 edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
922
923 if (!edge_port->txfifo.fifo) {
924 dbg("%s - no memory", __FUNCTION__);
925 edge_close (port, filp);
926 return -ENOMEM;
927 }
928
929 /* Allocate a URB for the write */
930 edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
931 edge_port->write_in_progress = false;
932
933 if (!edge_port->write_urb) {
934 dbg("%s - no memory", __FUNCTION__);
935 edge_close (port, filp);
936 return -ENOMEM;
937 }
938
939 dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
940
941 dbg("%s exited", __FUNCTION__);
942
943 return 0;
944 }
945
946
947 /************************************************************************
948 *
949 * block_until_chase_response
950 *
951 * This function will block the close until one of the following:
952 * 1. Response to our Chase comes from Edgeport
953 * 2. A timout of 10 seconds without activity has expired
954 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
955 *
956 ************************************************************************/
957 static void block_until_chase_response(struct edgeport_port *edge_port)
958 {
959 DEFINE_WAIT(wait);
960 __u16 lastCredits;
961 int timeout = 1*HZ;
962 int loop = 10;
963
964 while (1) {
965 // Save Last credits
966 lastCredits = edge_port->txCredits;
967
968 // Did we get our Chase response
969 if (!edge_port->chaseResponsePending) {
970 dbg("%s - Got Chase Response", __FUNCTION__);
971
972 // did we get all of our credit back?
973 if (edge_port->txCredits == edge_port->maxTxCredits ) {
974 dbg("%s - Got all credits", __FUNCTION__);
975 return;
976 }
977 }
978
979 // Block the thread for a while
980 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
981 schedule_timeout(timeout);
982 finish_wait(&edge_port->wait_chase, &wait);
983
984 if (lastCredits == edge_port->txCredits) {
985 // No activity.. count down.
986 loop--;
987 if (loop == 0) {
988 edge_port->chaseResponsePending = false;
989 dbg("%s - Chase TIMEOUT", __FUNCTION__);
990 return;
991 }
992 } else {
993 // Reset timout value back to 10 seconds
994 dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
995 loop = 10;
996 }
997 }
998 }
999
1000
1001 /************************************************************************
1002 *
1003 * block_until_tx_empty
1004 *
1005 * This function will block the close until one of the following:
1006 * 1. TX count are 0
1007 * 2. The edgeport has stopped
1008 * 3. A timout of 3 seconds without activity has expired
1009 *
1010 ************************************************************************/
1011 static void block_until_tx_empty (struct edgeport_port *edge_port)
1012 {
1013 DEFINE_WAIT(wait);
1014 struct TxFifo *fifo = &edge_port->txfifo;
1015 __u32 lastCount;
1016 int timeout = HZ/10;
1017 int loop = 30;
1018
1019 while (1) {
1020 // Save Last count
1021 lastCount = fifo->count;
1022
1023 // Is the Edgeport Buffer empty?
1024 if (lastCount == 0) {
1025 dbg("%s - TX Buffer Empty", __FUNCTION__);
1026 return;
1027 }
1028
1029 // Block the thread for a while
1030 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
1031 schedule_timeout(timeout);
1032 finish_wait(&edge_port->wait_chase, &wait);
1033
1034 dbg("%s wait", __FUNCTION__);
1035
1036 if (lastCount == fifo->count) {
1037 // No activity.. count down.
1038 loop--;
1039 if (loop == 0) {
1040 dbg("%s - TIMEOUT", __FUNCTION__);
1041 return;
1042 }
1043 } else {
1044 // Reset timout value back to seconds
1045 loop = 30;
1046 }
1047 }
1048 }
1049
1050
1051 /*****************************************************************************
1052 * edge_close
1053 * this function is called by the tty driver when a port is closed
1054 *****************************************************************************/
1055 static void edge_close (struct usb_serial_port *port, struct file * filp)
1056 {
1057 struct edgeport_serial *edge_serial;
1058 struct edgeport_port *edge_port;
1059 int status;
1060
1061 dbg("%s - port %d", __FUNCTION__, port->number);
1062
1063 edge_serial = usb_get_serial_data(port->serial);
1064 edge_port = usb_get_serial_port_data(port);
1065 if ((edge_serial == NULL) || (edge_port == NULL))
1066 return;
1067
1068 // block until tx is empty
1069 block_until_tx_empty(edge_port);
1070
1071 edge_port->closePending = true;
1072
1073 if ((!edge_serial->is_epic) ||
1074 ((edge_serial->is_epic) &&
1075 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1076 /* flush and chase */
1077 edge_port->chaseResponsePending = true;
1078
1079 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1080 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1081 if (status == 0) {
1082 // block until chase finished
1083 block_until_chase_response(edge_port);
1084 } else {
1085 edge_port->chaseResponsePending = false;
1086 }
1087 }
1088
1089 if ((!edge_serial->is_epic) ||
1090 ((edge_serial->is_epic) &&
1091 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1092 /* close the port */
1093 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1094 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1095 }
1096
1097 //port->close = true;
1098 edge_port->closePending = false;
1099 edge_port->open = false;
1100 edge_port->openPending = false;
1101
1102 usb_kill_urb(edge_port->write_urb);
1103
1104 if (edge_port->write_urb) {
1105 /* if this urb had a transfer buffer already (old transfer) free it */
1106 kfree(edge_port->write_urb->transfer_buffer);
1107 usb_free_urb(edge_port->write_urb);
1108 edge_port->write_urb = NULL;
1109 }
1110 kfree(edge_port->txfifo.fifo);
1111 edge_port->txfifo.fifo = NULL;
1112
1113 dbg("%s exited", __FUNCTION__);
1114 }
1115
1116 /*****************************************************************************
1117 * SerialWrite
1118 * this function is called by the tty driver when data should be written to
1119 * the port.
1120 * If successful, we return the number of bytes written, otherwise we return
1121 * a negative error number.
1122 *****************************************************************************/
1123 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1124 {
1125 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1126 struct TxFifo *fifo;
1127 int copySize;
1128 int bytesleft;
1129 int firsthalf;
1130 int secondhalf;
1131 unsigned long flags;
1132
1133 dbg("%s - port %d", __FUNCTION__, port->number);
1134
1135 if (edge_port == NULL)
1136 return -ENODEV;
1137
1138 // get a pointer to the Tx fifo
1139 fifo = &edge_port->txfifo;
1140
1141 spin_lock_irqsave(&edge_port->ep_lock, flags);
1142
1143 // calculate number of bytes to put in fifo
1144 copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1145
1146 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__,
1147 port->number, count, edge_port->txCredits - fifo->count, copySize);
1148
1149 /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1150 if (copySize == 0) {
1151 dbg("%s - copySize = Zero", __FUNCTION__);
1152 goto finish_write;
1153 }
1154
1155 // queue the data
1156 // since we can never overflow the buffer we do not have to check for full condition
1157
1158 // the copy is done is two parts -- first fill to the end of the buffer
1159 // then copy the reset from the start of the buffer
1160
1161 bytesleft = fifo->size - fifo->head;
1162 firsthalf = min (bytesleft, copySize);
1163 dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1164
1165 /* now copy our data */
1166 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1167 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]);
1168
1169 // update the index and size
1170 fifo->head += firsthalf;
1171 fifo->count += firsthalf;
1172
1173 // wrap the index
1174 if (fifo->head == fifo->size) {
1175 fifo->head = 0;
1176 }
1177
1178 secondhalf = copySize-firsthalf;
1179
1180 if (secondhalf) {
1181 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1182 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1183 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1184 // update the index and size
1185 fifo->count += secondhalf;
1186 fifo->head += secondhalf;
1187 // No need to check for wrap since we can not get to end of fifo in this part
1188 }
1189
1190 finish_write:
1191 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1192
1193 send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1194
1195 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1196
1197 return copySize;
1198 }
1199
1200
1201 /************************************************************************
1202 *
1203 * send_more_port_data()
1204 *
1205 * This routine attempts to write additional UART transmit data
1206 * to a port over the USB bulk pipe. It is called (1) when new
1207 * data has been written to a port's TxBuffer from higher layers
1208 * (2) when the peripheral sends us additional TxCredits indicating
1209 * that it can accept more Tx data for a given port; and (3) when
1210 * a bulk write completes successfully and we want to see if we
1211 * can transmit more.
1212 *
1213 ************************************************************************/
1214 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1215 {
1216 struct TxFifo *fifo = &edge_port->txfifo;
1217 struct urb *urb;
1218 unsigned char *buffer;
1219 int status;
1220 int count;
1221 int bytesleft;
1222 int firsthalf;
1223 int secondhalf;
1224 unsigned long flags;
1225
1226 dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1227
1228 spin_lock_irqsave(&edge_port->ep_lock, flags);
1229
1230 if (edge_port->write_in_progress ||
1231 !edge_port->open ||
1232 (fifo->count == 0)) {
1233 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1234 goto exit_send;
1235 }
1236
1237 // since the amount of data in the fifo will always fit into the
1238 // edgeport buffer we do not need to check the write length
1239
1240 // Do we have enough credits for this port to make it worthwhile
1241 // to bother queueing a write. If it's too small, say a few bytes,
1242 // it's better to wait for more credits so we can do a larger
1243 // write.
1244 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1245 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1246 goto exit_send;
1247 }
1248
1249 // lock this write
1250 edge_port->write_in_progress = true;
1251
1252 // get a pointer to the write_urb
1253 urb = edge_port->write_urb;
1254
1255 /* make sure transfer buffer is freed */
1256 kfree(urb->transfer_buffer);
1257 urb->transfer_buffer = NULL;
1258
1259 /* build the data header for the buffer and port that we are about to send out */
1260 count = fifo->count;
1261 buffer = kmalloc (count+2, GFP_ATOMIC);
1262 if (buffer == NULL) {
1263 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1264 edge_port->write_in_progress = false;
1265 goto exit_send;
1266 }
1267 buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1268 buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1269
1270 /* now copy our data */
1271 bytesleft = fifo->size - fifo->tail;
1272 firsthalf = min (bytesleft, count);
1273 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1274 fifo->tail += firsthalf;
1275 fifo->count -= firsthalf;
1276 if (fifo->tail == fifo->size) {
1277 fifo->tail = 0;
1278 }
1279
1280 secondhalf = count-firsthalf;
1281 if (secondhalf) {
1282 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1283 fifo->tail += secondhalf;
1284 fifo->count -= secondhalf;
1285 }
1286
1287 if (count)
1288 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1289
1290 /* fill up the urb with all of our data and submit it */
1291 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1292 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1293 buffer, count+2, edge_bulk_out_data_callback, edge_port);
1294
1295 /* decrement the number of credits we have by the number we just sent */
1296 edge_port->txCredits -= count;
1297 edge_port->icount.tx += count;
1298
1299 urb->dev = edge_serial->serial->dev;
1300 status = usb_submit_urb(urb, GFP_ATOMIC);
1301 if (status) {
1302 /* something went wrong */
1303 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1304 edge_port->write_in_progress = false;
1305
1306 /* revert the credits as something bad happened. */
1307 edge_port->txCredits += count;
1308 edge_port->icount.tx -= count;
1309 }
1310 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1311
1312 exit_send:
1313 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1314 }
1315
1316
1317 /*****************************************************************************
1318 * edge_write_room
1319 * this function is called by the tty driver when it wants to know how many
1320 * bytes of data we can accept for a specific port.
1321 * If successful, we return the amount of room that we have for this port
1322 * (the txCredits),
1323 * Otherwise we return a negative error number.
1324 *****************************************************************************/
1325 static int edge_write_room (struct usb_serial_port *port)
1326 {
1327 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1328 int room;
1329 unsigned long flags;
1330
1331 dbg("%s", __FUNCTION__);
1332
1333 if (edge_port == NULL)
1334 return -ENODEV;
1335 if (edge_port->closePending)
1336 return -ENODEV;
1337
1338 dbg("%s - port %d", __FUNCTION__, port->number);
1339
1340 if (!edge_port->open) {
1341 dbg("%s - port not opened", __FUNCTION__);
1342 return -EINVAL;
1343 }
1344
1345 // total of both buffers is still txCredit
1346 spin_lock_irqsave(&edge_port->ep_lock, flags);
1347 room = edge_port->txCredits - edge_port->txfifo.count;
1348 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1349
1350 dbg("%s - returns %d", __FUNCTION__, room);
1351 return room;
1352 }
1353
1354
1355 /*****************************************************************************
1356 * edge_chars_in_buffer
1357 * this function is called by the tty driver when it wants to know how many
1358 * bytes of data we currently have outstanding in the port (data that has
1359 * been written, but hasn't made it out the port yet)
1360 * If successful, we return the number of bytes left to be written in the
1361 * system,
1362 * Otherwise we return a negative error number.
1363 *****************************************************************************/
1364 static int edge_chars_in_buffer (struct usb_serial_port *port)
1365 {
1366 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1367 int num_chars;
1368 unsigned long flags;
1369
1370 dbg("%s", __FUNCTION__);
1371
1372 if (edge_port == NULL)
1373 return -ENODEV;
1374 if (edge_port->closePending)
1375 return -ENODEV;
1376
1377 if (!edge_port->open) {
1378 dbg("%s - port not opened", __FUNCTION__);
1379 return -EINVAL;
1380 }
1381
1382 spin_lock_irqsave(&edge_port->ep_lock, flags);
1383 num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1384 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1385 if (num_chars) {
1386 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1387 }
1388
1389 return num_chars;
1390 }
1391
1392
1393 /*****************************************************************************
1394 * SerialThrottle
1395 * this function is called by the tty driver when it wants to stop the data
1396 * being read from the port.
1397 *****************************************************************************/
1398 static void edge_throttle (struct usb_serial_port *port)
1399 {
1400 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1401 struct tty_struct *tty;
1402 int status;
1403
1404 dbg("%s - port %d", __FUNCTION__, port->number);
1405
1406 if (edge_port == NULL)
1407 return;
1408
1409 if (!edge_port->open) {
1410 dbg("%s - port not opened", __FUNCTION__);
1411 return;
1412 }
1413
1414 tty = port->tty;
1415 if (!tty) {
1416 dbg ("%s - no tty available", __FUNCTION__);
1417 return;
1418 }
1419
1420 /* if we are implementing XON/XOFF, send the stop character */
1421 if (I_IXOFF(tty)) {
1422 unsigned char stop_char = STOP_CHAR(tty);
1423 status = edge_write (port, &stop_char, 1);
1424 if (status <= 0) {
1425 return;
1426 }
1427 }
1428
1429 /* if we are implementing RTS/CTS, toggle that line */
1430 if (tty->termios->c_cflag & CRTSCTS) {
1431 edge_port->shadowMCR &= ~MCR_RTS;
1432 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1433 if (status != 0) {
1434 return;
1435 }
1436 }
1437
1438 return;
1439 }
1440
1441
1442 /*****************************************************************************
1443 * edge_unthrottle
1444 * this function is called by the tty driver when it wants to resume the data
1445 * being read from the port (called after SerialThrottle is called)
1446 *****************************************************************************/
1447 static void edge_unthrottle (struct usb_serial_port *port)
1448 {
1449 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1450 struct tty_struct *tty;
1451 int status;
1452
1453 dbg("%s - port %d", __FUNCTION__, port->number);
1454
1455 if (edge_port == NULL)
1456 return;
1457
1458 if (!edge_port->open) {
1459 dbg("%s - port not opened", __FUNCTION__);
1460 return;
1461 }
1462
1463 tty = port->tty;
1464 if (!tty) {
1465 dbg ("%s - no tty available", __FUNCTION__);
1466 return;
1467 }
1468
1469 /* if we are implementing XON/XOFF, send the start character */
1470 if (I_IXOFF(tty)) {
1471 unsigned char start_char = START_CHAR(tty);
1472 status = edge_write (port, &start_char, 1);
1473 if (status <= 0) {
1474 return;
1475 }
1476 }
1477
1478 /* if we are implementing RTS/CTS, toggle that line */
1479 if (tty->termios->c_cflag & CRTSCTS) {
1480 edge_port->shadowMCR |= MCR_RTS;
1481 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1482 if (status != 0) {
1483 return;
1484 }
1485 }
1486
1487 return;
1488 }
1489
1490
1491 /*****************************************************************************
1492 * SerialSetTermios
1493 * this function is called by the tty driver when it wants to change the termios structure
1494 *****************************************************************************/
1495 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1496 {
1497 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1498 struct tty_struct *tty = port->tty;
1499 unsigned int cflag;
1500
1501 if (!port->tty || !port->tty->termios) {
1502 dbg ("%s - no tty or termios", __FUNCTION__);
1503 return;
1504 }
1505
1506 cflag = tty->termios->c_cflag;
1507 /* check that they really want us to change something */
1508 if (old_termios) {
1509 if (cflag == old_termios->c_cflag &&
1510 tty->termios->c_iflag == old_termios->c_iflag) {
1511 dbg("%s - nothing to change", __FUNCTION__);
1512 return;
1513 }
1514 }
1515
1516 dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1517 tty->termios->c_cflag, tty->termios->c_iflag);
1518 if (old_termios) {
1519 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1520 old_termios->c_cflag, old_termios->c_iflag);
1521 }
1522
1523 dbg("%s - port %d", __FUNCTION__, port->number);
1524
1525 if (edge_port == NULL)
1526 return;
1527
1528 if (!edge_port->open) {
1529 dbg("%s - port not opened", __FUNCTION__);
1530 return;
1531 }
1532
1533 /* change the port settings to the new ones specified */
1534 change_port_settings (edge_port, old_termios);
1535
1536 return;
1537 }
1538
1539
1540 /*****************************************************************************
1541 * get_lsr_info - get line status register info
1542 *
1543 * Purpose: Let user call ioctl() to get info when the UART physically
1544 * is emptied. On bus types like RS485, the transmitter must
1545 * release the bus after transmitting. This must be done when
1546 * the transmit shift register is empty, not be done when the
1547 * transmit holding register is empty. This functionality
1548 * allows an RS485 driver to be written in user space.
1549 *****************************************************************************/
1550 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1551 {
1552 unsigned int result = 0;
1553 unsigned long flags;
1554
1555 spin_lock_irqsave(&edge_port->ep_lock, flags);
1556 if (edge_port->maxTxCredits == edge_port->txCredits &&
1557 edge_port->txfifo.count == 0) {
1558 dbg("%s -- Empty", __FUNCTION__);
1559 result = TIOCSER_TEMT;
1560 }
1561 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1562
1563 if (copy_to_user(value, &result, sizeof(int)))
1564 return -EFAULT;
1565 return 0;
1566 }
1567
1568 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1569 {
1570 unsigned int result = 0;
1571 struct tty_struct *tty = edge_port->port->tty;
1572
1573 if (!tty)
1574 return -ENOIOCTLCMD;
1575
1576 result = tty->read_cnt;
1577
1578 dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result);
1579 if (copy_to_user(value, &result, sizeof(int)))
1580 return -EFAULT;
1581 //return 0;
1582 return -ENOIOCTLCMD;
1583 }
1584
1585 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1586 {
1587 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1588 unsigned int mcr;
1589
1590 dbg("%s - port %d", __FUNCTION__, port->number);
1591
1592 mcr = edge_port->shadowMCR;
1593 if (set & TIOCM_RTS)
1594 mcr |= MCR_RTS;
1595 if (set & TIOCM_DTR)
1596 mcr |= MCR_DTR;
1597 if (set & TIOCM_LOOP)
1598 mcr |= MCR_LOOPBACK;
1599
1600 if (clear & TIOCM_RTS)
1601 mcr &= ~MCR_RTS;
1602 if (clear & TIOCM_DTR)
1603 mcr &= ~MCR_DTR;
1604 if (clear & TIOCM_LOOP)
1605 mcr &= ~MCR_LOOPBACK;
1606
1607 edge_port->shadowMCR = mcr;
1608
1609 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1610
1611 return 0;
1612 }
1613
1614 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1615 {
1616 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1617 unsigned int result = 0;
1618 unsigned int msr;
1619 unsigned int mcr;
1620
1621 dbg("%s - port %d", __FUNCTION__, port->number);
1622
1623 msr = edge_port->shadowMSR;
1624 mcr = edge_port->shadowMCR;
1625 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1626 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1627 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1628 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1629 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1630 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1631
1632
1633 dbg("%s -- %x", __FUNCTION__, result);
1634
1635 return result;
1636 }
1637
1638 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1639 {
1640 struct serial_struct tmp;
1641
1642 if (!retinfo)
1643 return -EFAULT;
1644
1645 memset(&tmp, 0, sizeof(tmp));
1646
1647 tmp.type = PORT_16550A;
1648 tmp.line = edge_port->port->serial->minor;
1649 tmp.port = edge_port->port->number;
1650 tmp.irq = 0;
1651 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1652 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1653 tmp.baud_base = 9600;
1654 tmp.close_delay = 5*HZ;
1655 tmp.closing_wait = 30*HZ;
1656 // tmp.custom_divisor = state->custom_divisor;
1657 // tmp.hub6 = state->hub6;
1658 // tmp.io_type = state->io_type;
1659
1660 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1661 return -EFAULT;
1662 return 0;
1663 }
1664
1665
1666
1667 /*****************************************************************************
1668 * SerialIoctl
1669 * this function handles any ioctl calls to the driver
1670 *****************************************************************************/
1671 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1672 {
1673 DEFINE_WAIT(wait);
1674 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1675 struct async_icount cnow;
1676 struct async_icount cprev;
1677 struct serial_icounter_struct icount;
1678
1679 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1680
1681 switch (cmd) {
1682 // return number of bytes available
1683 case TIOCINQ:
1684 dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
1685 return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1686 break;
1687
1688 case TIOCSERGETLSR:
1689 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
1690 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1691 return 0;
1692
1693 case TIOCGSERIAL:
1694 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
1695 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1696
1697 case TIOCSSERIAL:
1698 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
1699 break;
1700
1701 case TIOCMIWAIT:
1702 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
1703 cprev = edge_port->icount;
1704 while (1) {
1705 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1706 schedule();
1707 finish_wait(&edge_port->delta_msr_wait, &wait);
1708 /* see if a signal did it */
1709 if (signal_pending(current))
1710 return -ERESTARTSYS;
1711 cnow = edge_port->icount;
1712 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1713 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1714 return -EIO; /* no change => error */
1715 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1716 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1717 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1718 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1719 return 0;
1720 }
1721 cprev = cnow;
1722 }
1723 /* NOTREACHED */
1724 break;
1725
1726 case TIOCGICOUNT:
1727 cnow = edge_port->icount;
1728 memset(&icount, 0, sizeof(icount));
1729 icount.cts = cnow.cts;
1730 icount.dsr = cnow.dsr;
1731 icount.rng = cnow.rng;
1732 icount.dcd = cnow.dcd;
1733 icount.rx = cnow.rx;
1734 icount.tx = cnow.tx;
1735 icount.frame = cnow.frame;
1736 icount.overrun = cnow.overrun;
1737 icount.parity = cnow.parity;
1738 icount.brk = cnow.brk;
1739 icount.buf_overrun = cnow.buf_overrun;
1740
1741 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx );
1742 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1743 return -EFAULT;
1744 return 0;
1745 }
1746
1747 return -ENOIOCTLCMD;
1748 }
1749
1750
1751 /*****************************************************************************
1752 * SerialBreak
1753 * this function sends a break to the port
1754 *****************************************************************************/
1755 static void edge_break (struct usb_serial_port *port, int break_state)
1756 {
1757 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1758 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1759 int status;
1760
1761 if ((!edge_serial->is_epic) ||
1762 ((edge_serial->is_epic) &&
1763 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1764 /* flush and chase */
1765 edge_port->chaseResponsePending = true;
1766
1767 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1768 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1769 if (status == 0) {
1770 // block until chase finished
1771 block_until_chase_response(edge_port);
1772 } else {
1773 edge_port->chaseResponsePending = false;
1774 }
1775 }
1776
1777 if ((!edge_serial->is_epic) ||
1778 ((edge_serial->is_epic) &&
1779 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1780 if (break_state == -1) {
1781 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1782 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1783 } else {
1784 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1785 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1786 }
1787 if (status) {
1788 dbg("%s - error sending break set/clear command.", __FUNCTION__);
1789 }
1790 }
1791
1792 return;
1793 }
1794
1795
1796 /*****************************************************************************
1797 * process_rcvd_data
1798 * this function handles the data received on the bulk in pipe.
1799 *****************************************************************************/
1800 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1801 {
1802 struct usb_serial_port *port;
1803 struct edgeport_port *edge_port;
1804 struct tty_struct *tty;
1805 __u16 lastBufferLength;
1806 __u16 rxLen;
1807
1808 dbg("%s", __FUNCTION__);
1809
1810 lastBufferLength = bufferLength + 1;
1811
1812 while (bufferLength > 0) {
1813 /* failsafe incase we get a message that we don't understand */
1814 if (lastBufferLength == bufferLength) {
1815 dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1816 break;
1817 }
1818 lastBufferLength = bufferLength;
1819
1820 switch (edge_serial->rxState) {
1821 case EXPECT_HDR1:
1822 edge_serial->rxHeader1 = *buffer;
1823 ++buffer;
1824 --bufferLength;
1825
1826 if (bufferLength == 0) {
1827 edge_serial->rxState = EXPECT_HDR2;
1828 break;
1829 }
1830 /* otherwise, drop on through */
1831
1832 case EXPECT_HDR2:
1833 edge_serial->rxHeader2 = *buffer;
1834 ++buffer;
1835 --bufferLength;
1836
1837 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1838
1839 // Process depending on whether this header is
1840 // data or status
1841
1842 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1843 // Decode this status header and goto EXPECT_HDR1 (if we
1844 // can process the status with only 2 bytes), or goto
1845 // EXPECT_HDR3 to get the third byte.
1846
1847 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1848 edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
1849
1850 if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
1851 // This status needs additional bytes. Save what we have
1852 // and then wait for more data.
1853 edge_serial->rxStatusParam = edge_serial->rxHeader2;
1854
1855 edge_serial->rxState = EXPECT_HDR3;
1856 break;
1857 }
1858
1859 // We have all the header bytes, process the status now
1860 process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
1861 edge_serial->rxState = EXPECT_HDR1;
1862 break;
1863 } else {
1864 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1865 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
1866
1867 dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
1868
1869 //ASSERT( DevExt->RxPort < DevExt->NumPorts );
1870 //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
1871
1872 if (bufferLength == 0 ) {
1873 edge_serial->rxState = EXPECT_DATA;
1874 break;
1875 }
1876 // Else, drop through
1877 }
1878
1879 case EXPECT_DATA: // Expect data
1880
1881 if (bufferLength < edge_serial->rxBytesRemaining) {
1882 rxLen = bufferLength;
1883 edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer
1884 } else {
1885 // BufLen >= RxBytesRemaining
1886 rxLen = edge_serial->rxBytesRemaining;
1887 edge_serial->rxState = EXPECT_HDR1; // Start another header next time
1888 }
1889
1890 bufferLength -= rxLen;
1891 edge_serial->rxBytesRemaining -= rxLen;
1892
1893 /* spit this data back into the tty driver if this port is open */
1894 if (rxLen) {
1895 port = edge_serial->serial->port[edge_serial->rxPort];
1896 edge_port = usb_get_serial_port_data(port);
1897 if (edge_port->open) {
1898 tty = edge_port->port->tty;
1899 if (tty) {
1900 dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
1901 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1902 }
1903 edge_port->icount.rx += rxLen;
1904 }
1905 buffer += rxLen;
1906 }
1907
1908 break;
1909
1910 case EXPECT_HDR3: // Expect 3rd byte of status header
1911 edge_serial->rxHeader3 = *buffer;
1912 ++buffer;
1913 --bufferLength;
1914
1915 // We have all the header bytes, process the status now
1916 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
1917 edge_serial->rxState = EXPECT_HDR1;
1918 break;
1919
1920 }
1921 }
1922 }
1923
1924
1925 /*****************************************************************************
1926 * process_rcvd_status
1927 * this function handles the any status messages received on the bulk in pipe.
1928 *****************************************************************************/
1929 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
1930 {
1931 struct usb_serial_port *port;
1932 struct edgeport_port *edge_port;
1933 __u8 code = edge_serial->rxStatusCode;
1934
1935 /* switch the port pointer to the one being currently talked about */
1936 port = edge_serial->serial->port[edge_serial->rxPort];
1937 edge_port = usb_get_serial_port_data(port);
1938 if (edge_port == NULL) {
1939 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
1940 return;
1941 }
1942
1943 dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
1944
1945 if (code == IOSP_EXT_STATUS) {
1946 switch (byte2) {
1947 case IOSP_EXT_STATUS_CHASE_RSP:
1948 // we want to do EXT status regardless of port open/closed
1949 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
1950 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
1951 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
1952 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
1953 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
1954 // like wait longer in block_until_chase_response, but for now we don't.
1955 edge_port->chaseResponsePending = false;
1956 wake_up (&edge_port->wait_chase);
1957 return;
1958
1959 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1960 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
1961 //Port->RxCheckRsp = true;
1962 return;
1963 }
1964 }
1965
1966 if (code == IOSP_STATUS_OPEN_RSP) {
1967 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1968 edge_port->maxTxCredits = edge_port->txCredits;
1969 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
1970 handle_new_msr (edge_port, byte2);
1971
1972 /* send the current line settings to the port so we are in sync with any further termios calls */
1973 if (edge_port->port->tty)
1974 change_port_settings (edge_port, edge_port->port->tty->termios);
1975
1976 /* we have completed the open */
1977 edge_port->openPending = false;
1978 edge_port->open = true;
1979 wake_up(&edge_port->wait_open);
1980 return;
1981 }
1982
1983 // If port is closed, silently discard all rcvd status. We can
1984 // have cases where buffered status is received AFTER the close
1985 // port command is sent to the Edgeport.
1986 if (!edge_port->open || edge_port->closePending) {
1987 return;
1988 }
1989
1990 switch (code) {
1991 // Not currently sent by Edgeport
1992 case IOSP_STATUS_LSR:
1993 dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
1994 handle_new_lsr(edge_port, false, byte2, 0);
1995 break;
1996
1997 case IOSP_STATUS_LSR_DATA:
1998 dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
1999 // byte2 is LSR Register
2000 // byte3 is broken data byte
2001 handle_new_lsr(edge_port, true, byte2, byte3);
2002 break;
2003 //
2004 // case IOSP_EXT_4_STATUS:
2005 // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2006 // break;
2007 //
2008 case IOSP_STATUS_MSR:
2009 dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2010
2011 // Process this new modem status and generate appropriate
2012 // events, etc, based on the new status. This routine
2013 // also saves the MSR in Port->ShadowMsr.
2014 handle_new_msr(edge_port, byte2);
2015 break;
2016
2017 default:
2018 dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
2019 break;
2020 }
2021
2022 return;
2023 }
2024
2025
2026 /*****************************************************************************
2027 * edge_tty_recv
2028 * this function passes data on to the tty flip buffer
2029 *****************************************************************************/
2030 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2031 {
2032 int cnt;
2033
2034 do {
2035 cnt = tty_buffer_request_room(tty, length);
2036 if (cnt < length) {
2037 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2038 __FUNCTION__, length - cnt);
2039 if(cnt == 0)
2040 break;
2041 }
2042 tty_insert_flip_string(tty, data, cnt);
2043 data += cnt;
2044 length -= cnt;
2045 } while (length > 0);
2046
2047 tty_flip_buffer_push(tty);
2048 }
2049
2050
2051 /*****************************************************************************
2052 * handle_new_msr
2053 * this function handles any change to the msr register for a port.
2054 *****************************************************************************/
2055 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2056 {
2057 struct async_icount *icount;
2058
2059 dbg("%s %02x", __FUNCTION__, newMsr);
2060
2061 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2062 icount = &edge_port->icount;
2063
2064 /* update input line counters */
2065 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2066 icount->cts++;
2067 }
2068 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2069 icount->dsr++;
2070 }
2071 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2072 icount->dcd++;
2073 }
2074 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2075 icount->rng++;
2076 }
2077 wake_up_interruptible(&edge_port->delta_msr_wait);
2078 }
2079
2080 /* Save the new modem status */
2081 edge_port->shadowMSR = newMsr & 0xf0;
2082
2083 return;
2084 }
2085
2086
2087 /*****************************************************************************
2088 * handle_new_lsr
2089 * this function handles any change to the lsr register for a port.
2090 *****************************************************************************/
2091 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2092 {
2093 __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2094 struct async_icount *icount;
2095
2096 dbg("%s - %02x", __FUNCTION__, newLsr);
2097
2098 edge_port->shadowLSR = lsr;
2099
2100 if (newLsr & LSR_BREAK) {
2101 //
2102 // Parity and Framing errors only count if they
2103 // occur exclusive of a break being
2104 // received.
2105 //
2106 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2107 }
2108
2109 /* Place LSR data byte into Rx buffer */
2110 if (lsrData && edge_port->port->tty)
2111 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2112
2113 /* update input line counters */
2114 icount = &edge_port->icount;
2115 if (newLsr & LSR_BREAK) {
2116 icount->brk++;
2117 }
2118 if (newLsr & LSR_OVER_ERR) {
2119 icount->overrun++;
2120 }
2121 if (newLsr & LSR_PAR_ERR) {
2122 icount->parity++;
2123 }
2124 if (newLsr & LSR_FRM_ERR) {
2125 icount->frame++;
2126 }
2127
2128 return;
2129 }
2130
2131
2132 /****************************************************************************
2133 * sram_write
2134 * writes a number of bytes to the Edgeport device's sram starting at the
2135 * given address.
2136 * If successful returns the number of bytes written, otherwise it returns
2137 * a negative error number of the problem.
2138 ****************************************************************************/
2139 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2140 {
2141 int result;
2142 __u16 current_length;
2143 unsigned char *transfer_buffer;
2144
2145 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2146
2147 transfer_buffer = kmalloc (64, GFP_KERNEL);
2148 if (!transfer_buffer) {
2149 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2150 return -ENOMEM;
2151 }
2152
2153 /* need to split these writes up into 64 byte chunks */
2154 result = 0;
2155 while (length > 0) {
2156 if (length > 64) {
2157 current_length = 64;
2158 } else {
2159 current_length = length;
2160 }
2161 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2162 memcpy (transfer_buffer, data, current_length);
2163 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2164 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2165 if (result < 0)
2166 break;
2167 length -= current_length;
2168 addr += current_length;
2169 data += current_length;
2170 }
2171
2172 kfree (transfer_buffer);
2173 return result;
2174 }
2175
2176
2177 /****************************************************************************
2178 * rom_write
2179 * writes a number of bytes to the Edgeport device's ROM starting at the
2180 * given address.
2181 * If successful returns the number of bytes written, otherwise it returns
2182 * a negative error number of the problem.
2183 ****************************************************************************/
2184 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2185 {
2186 int result;
2187 __u16 current_length;
2188 unsigned char *transfer_buffer;
2189
2190 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2191
2192 transfer_buffer = kmalloc (64, GFP_KERNEL);
2193 if (!transfer_buffer) {
2194 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2195 return -ENOMEM;
2196 }
2197
2198 /* need to split these writes up into 64 byte chunks */
2199 result = 0;
2200 while (length > 0) {
2201 if (length > 64) {
2202 current_length = 64;
2203 } else {
2204 current_length = length;
2205 }
2206 // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2207 memcpy (transfer_buffer, data, current_length);
2208 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2209 0x40, addr, extAddr, transfer_buffer, current_length, 300);
2210 if (result < 0)
2211 break;
2212 length -= current_length;
2213 addr += current_length;
2214 data += current_length;
2215 }
2216
2217 kfree (transfer_buffer);
2218 return result;
2219 }
2220
2221
2222 /****************************************************************************
2223 * rom_read
2224 * reads a number of bytes from the Edgeport device starting at the given
2225 * address.
2226 * If successful returns the number of bytes read, otherwise it returns
2227 * a negative error number of the problem.
2228 ****************************************************************************/
2229 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2230 {
2231 int result;
2232 __u16 current_length;
2233 unsigned char *transfer_buffer;
2234
2235 dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2236
2237 transfer_buffer = kmalloc (64, GFP_KERNEL);
2238 if (!transfer_buffer) {
2239 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2240 return -ENOMEM;
2241 }
2242
2243 /* need to split these reads up into 64 byte chunks */
2244 result = 0;
2245 while (length > 0) {
2246 if (length > 64) {
2247 current_length = 64;
2248 } else {
2249 current_length = length;
2250 }
2251 // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2252 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2253 0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2254 if (result < 0)
2255 break;
2256 memcpy (data, transfer_buffer, current_length);
2257 length -= current_length;
2258 addr += current_length;
2259 data += current_length;
2260 }
2261
2262 kfree (transfer_buffer);
2263 return result;
2264 }
2265
2266
2267 /****************************************************************************
2268 * send_iosp_ext_cmd
2269 * Is used to send a IOSP message to the Edgeport device
2270 ****************************************************************************/
2271 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2272 {
2273 unsigned char *buffer;
2274 unsigned char *currentCommand;
2275 int length = 0;
2276 int status = 0;
2277
2278 dbg("%s - %d, %d", __FUNCTION__, command, param);
2279
2280 buffer = kmalloc (10, GFP_ATOMIC);
2281 if (!buffer) {
2282 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2283 return -ENOMEM;
2284 }
2285
2286 currentCommand = buffer;
2287
2288 MAKE_CMD_EXT_CMD (&currentCommand, &length,
2289 edge_port->port->number - edge_port->port->serial->minor,
2290 command, param);
2291
2292 status = write_cmd_usb (edge_port, buffer, length);
2293 if (status) {
2294 /* something bad happened, let's free up the memory */
2295 kfree(buffer);
2296 }
2297
2298 return status;
2299 }
2300
2301
2302 /*****************************************************************************
2303 * write_cmd_usb
2304 * this function writes the given buffer out to the bulk write endpoint.
2305 *****************************************************************************/
2306 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2307 {
2308 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2309 int status = 0;
2310 struct urb *urb;
2311 int timeout;
2312
2313 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2314
2315 /* Allocate our next urb */
2316 urb = usb_alloc_urb (0, GFP_ATOMIC);
2317 if (!urb)
2318 return -ENOMEM;
2319
2320 atomic_inc(&CmdUrbs);
2321 dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, atomic_read(&CmdUrbs));
2322
2323 usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2324 usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2325 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2326
2327 edge_port->commandPending = true;
2328 status = usb_submit_urb(urb, GFP_ATOMIC);
2329
2330 if (status) {
2331 /* something went wrong */
2332 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2333 usb_kill_urb(urb);
2334 usb_free_urb(urb);
2335 atomic_dec(&CmdUrbs);
2336 return status;
2337 }
2338
2339 // wait for command to finish
2340 timeout = COMMAND_TIMEOUT;
2341 #if 0
2342 wait_event (&edge_port->wait_command, !edge_port->commandPending);
2343
2344 if (edge_port->commandPending) {
2345 /* command timed out */
2346 dbg("%s - command timed out", __FUNCTION__);
2347 status = -EINVAL;
2348 }
2349 #endif
2350 return status;
2351 }
2352
2353
2354 /*****************************************************************************
2355 * send_cmd_write_baud_rate
2356 * this function sends the proper command to change the baud rate of the
2357 * specified port.
2358 *****************************************************************************/
2359 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2360 {
2361 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2362 unsigned char *cmdBuffer;
2363 unsigned char *currCmd;
2364 int cmdLen = 0;
2365 int divisor;
2366 int status;
2367 unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2368
2369 if ((!edge_serial->is_epic) ||
2370 ((edge_serial->is_epic) &&
2371 (!edge_serial->epic_descriptor.Supports.IOSPSetBaudRate))) {
2372 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2373 edge_port->port->number, baudRate);
2374 return 0;
2375 }
2376
2377 dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2378
2379 status = calc_baud_rate_divisor (baudRate, &divisor);
2380 if (status) {
2381 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2382 return status;
2383 }
2384
2385 // Alloc memory for the string of commands.
2386 cmdBuffer = kmalloc (0x100, GFP_ATOMIC);
2387 if (!cmdBuffer) {
2388 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2389 return -ENOMEM;
2390 }
2391 currCmd = cmdBuffer;
2392
2393 // Enable access to divisor latch
2394 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2395
2396 // Write the divisor itself
2397 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2398 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2399
2400 // Restore original value to disable access to divisor latch
2401 MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2402
2403 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2404 if (status) {
2405 /* something bad happened, let's free up the memory */
2406 kfree (cmdBuffer);
2407 }
2408
2409 return status;
2410 }
2411
2412
2413 /*****************************************************************************
2414 * calc_baud_rate_divisor
2415 * this function calculates the proper baud rate divisor for the specified
2416 * baud rate.
2417 *****************************************************************************/
2418 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2419 {
2420 int i;
2421 __u16 custom;
2422
2423
2424 dbg("%s - %d", __FUNCTION__, baudrate);
2425
2426 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2427 if ( divisor_table[i].BaudRate == baudrate ) {
2428 *divisor = divisor_table[i].Divisor;
2429 return 0;
2430 }
2431 }
2432
2433 // We have tried all of the standard baud rates
2434 // lets try to calculate the divisor for this baud rate
2435 // Make sure the baud rate is reasonable
2436 if (baudrate > 50 && baudrate < 230400) {
2437 // get divisor
2438 custom = (__u16)((230400L + baudrate/2) / baudrate);
2439
2440 *divisor = custom;
2441
2442 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2443 return 0;
2444 }
2445
2446 return -1;
2447 }
2448
2449
2450 /*****************************************************************************
2451 * send_cmd_write_uart_register
2452 * this function builds up a uart register message and sends to to the device.
2453 *****************************************************************************/
2454 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2455 {
2456 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2457 unsigned char *cmdBuffer;
2458 unsigned char *currCmd;
2459 unsigned long cmdLen = 0;
2460 int status;
2461
2462 dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2463
2464 if ((!edge_serial->is_epic) ||
2465 ((edge_serial->is_epic) &&
2466 (!edge_serial->epic_descriptor.Supports.IOSPWriteMCR) &&
2467 (regNum == MCR))) {
2468 dbg("SendCmdWriteUartReg - Not writting to MCR Register");
2469 return 0;
2470 }
2471
2472 if ((!edge_serial->is_epic) ||
2473 ((edge_serial->is_epic) &&
2474 (!edge_serial->epic_descriptor.Supports.IOSPWriteLCR) &&
2475 (regNum == LCR))) {
2476 dbg ("SendCmdWriteUartReg - Not writting to LCR Register");
2477 return 0;
2478 }
2479
2480 // Alloc memory for the string of commands.
2481 cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2482 if (cmdBuffer == NULL ) {
2483 return -ENOMEM;
2484 }
2485
2486 currCmd = cmdBuffer;
2487
2488 // Build a cmd in the buffer to write the given register
2489 MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2490 edge_port->port->number - edge_port->port->serial->minor,
2491 regNum, regValue);
2492
2493 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2494 if (status) {
2495 /* something bad happened, let's free up the memory */
2496 kfree (cmdBuffer);
2497 }
2498
2499 return status;
2500 }
2501
2502
2503 /*****************************************************************************
2504 * change_port_settings
2505 * This routine is called to set the UART on the device to match the specified
2506 * new settings.
2507 *****************************************************************************/
2508 #ifndef CMSPAR
2509 #define CMSPAR 0
2510 #endif
2511 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
2512 {
2513 struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2514 struct tty_struct *tty;
2515 int baud;
2516 unsigned cflag;
2517 __u8 mask = 0xff;
2518 __u8 lData;
2519 __u8 lParity;
2520 __u8 lStop;
2521 __u8 rxFlow;
2522 __u8 txFlow;
2523 int status;
2524
2525 dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2526
2527 if (!edge_port->open &&
2528 !edge_port->openPending) {
2529 dbg("%s - port not opened", __FUNCTION__);
2530 return;
2531 }
2532
2533 tty = edge_port->port->tty;
2534 if ((!tty) ||
2535 (!tty->termios)) {
2536 dbg("%s - no tty structures", __FUNCTION__);
2537 return;
2538 }
2539
2540 cflag = tty->termios->c_cflag;
2541
2542 switch (cflag & CSIZE) {
2543 case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break;
2544 case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break;
2545 case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break;
2546 default:
2547 case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); 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 dbg("%s - parity = mark", __FUNCTION__);
2556 } else {
2557 lParity = LCR_PAR_SPACE;
2558 dbg("%s - parity = space", __FUNCTION__);
2559 }
2560 } else if (cflag & PARODD) {
2561 lParity = LCR_PAR_ODD;
2562 dbg("%s - parity = odd", __FUNCTION__);
2563 } else {
2564 lParity = LCR_PAR_EVEN;
2565 dbg("%s - parity = even", __FUNCTION__);
2566 }
2567 } else {
2568 dbg("%s - parity = none", __FUNCTION__);
2569 }
2570
2571 if (cflag & CSTOPB) {
2572 lStop = LCR_STOP_2;
2573 dbg("%s - stop bits = 2", __FUNCTION__);
2574 } else {
2575 lStop = LCR_STOP_1;
2576 dbg("%s - stop bits = 1", __FUNCTION__);
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 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2585 } else {
2586 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2587 }
2588
2589 /* if we are implementing XON/XOFF, set the start and stop character in the device */
2590 if (I_IXOFF(tty) || I_IXON(tty)) {
2591 unsigned char stop_char = STOP_CHAR(tty);
2592 unsigned char start_char = START_CHAR(tty);
2593
2594 if ((!edge_serial->is_epic) ||
2595 ((edge_serial->is_epic) &&
2596 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2597 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2598 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2599 }
2600
2601 /* if we are implementing INBOUND XON/XOFF */
2602 if (I_IXOFF(tty)) {
2603 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2604 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2605 } else {
2606 dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2607 }
2608
2609 /* if we are implementing OUTBOUND XON/XOFF */
2610 if (I_IXON(tty)) {
2611 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2612 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2613 } else {
2614 dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2615 }
2616 }
2617
2618 /* Set flow control to the configured value */
2619 if ((!edge_serial->is_epic) ||
2620 ((edge_serial->is_epic) &&
2621 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2622 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2623 if ((!edge_serial->is_epic) ||
2624 ((edge_serial->is_epic) &&
2625 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2626 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2627
2628
2629 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2630 edge_port->shadowLCR |= (lData | lParity | lStop);
2631
2632 edge_port->validDataMask = mask;
2633
2634 /* Send the updated LCR value to the EdgePort */
2635 status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2636 if (status != 0) {
2637 return;
2638 }
2639
2640 /* set up the MCR register and send it to the EdgePort */
2641 edge_port->shadowMCR = MCR_MASTER_IE;
2642 if (cflag & CBAUD) {
2643 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2644 }
2645 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2646 if (status != 0) {
2647 return;
2648 }
2649
2650 /* Determine divisor based on baud rate */
2651 baud = tty_get_baud_rate(tty);
2652 if (!baud) {
2653 /* pick a default, any default... */
2654 baud = 9600;
2655 }
2656
2657 dbg("%s - baud rate = %d", __FUNCTION__, baud);
2658 status = send_cmd_write_baud_rate (edge_port, baud);
2659
2660 return;
2661 }
2662
2663
2664 /****************************************************************************
2665 * unicode_to_ascii
2666 * Turns a string from Unicode into ASCII.
2667 * Doesn't do a good job with any characters that are outside the normal
2668 * ASCII range, but it's only for debugging...
2669 * NOTE: expects the unicode in LE format
2670 ****************************************************************************/
2671 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size)
2672 {
2673 int i;
2674
2675 if (buflen <= 0) /* never happens, but... */
2676 return;
2677 --buflen; /* space for nul */
2678
2679 for (i = 0; i < unicode_size; i++) {
2680 if (i >= buflen)
2681 break;
2682 string[i] = (char)(le16_to_cpu(unicode[i]));
2683 }
2684 string[i] = 0x00;
2685 }
2686
2687
2688 /****************************************************************************
2689 * get_manufacturing_desc
2690 * reads in the manufacturing descriptor and stores it into the serial
2691 * structure.
2692 ****************************************************************************/
2693 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2694 {
2695 int response;
2696
2697 dbg("getting manufacturer descriptor");
2698
2699 response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2700 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2701 (__u8 *)(&edge_serial->manuf_descriptor));
2702
2703 if (response < 1) {
2704 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2705 } else {
2706 char string[30];
2707 dbg("**Manufacturer Descriptor");
2708 dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize);
2709 dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize);
2710 dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev);
2711 dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev);
2712 dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts);
2713 dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2714 unicode_to_ascii(string, sizeof(string),
2715 edge_serial->manuf_descriptor.SerialNumber,
2716 edge_serial->manuf_descriptor.SerNumLength/2);
2717 dbg(" SerialNumber: %s", string);
2718 unicode_to_ascii(string, sizeof(string),
2719 edge_serial->manuf_descriptor.AssemblyNumber,
2720 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2721 dbg(" AssemblyNumber: %s", string);
2722 unicode_to_ascii(string, sizeof(string),
2723 edge_serial->manuf_descriptor.OemAssyNumber,
2724 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2725 dbg(" OemAssyNumber: %s", string);
2726 dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType);
2727 dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid);
2728 dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig);
2729 }
2730 }
2731
2732
2733 /****************************************************************************
2734 * get_boot_desc
2735 * reads in the bootloader descriptor and stores it into the serial
2736 * structure.
2737 ****************************************************************************/
2738 static void get_boot_desc (struct edgeport_serial *edge_serial)
2739 {
2740 int response;
2741
2742 dbg("getting boot descriptor");
2743
2744 response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2745 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2746 (__u8 *)(&edge_serial->boot_descriptor));
2747
2748 if (response < 1) {
2749 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2750 } else {
2751 dbg("**Boot Descriptor:");
2752 dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2753 dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion);
2754 dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion);
2755 dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2756 dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2757 dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0);
2758 dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1);
2759 }
2760 }
2761
2762
2763 /****************************************************************************
2764 * load_application_firmware
2765 * This is called to load the application firmware to the device
2766 ****************************************************************************/
2767 static void load_application_firmware (struct edgeport_serial *edge_serial)
2768 {
2769 struct edge_firmware_image_record *record;
2770 unsigned char *firmware;
2771 unsigned char *FirmwareImage;
2772 int ImageSize;
2773 int response;
2774
2775
2776 switch (edge_serial->product_info.iDownloadFile) {
2777 case EDGE_DOWNLOAD_FILE_I930:
2778 dbg("downloading firmware version (930) %d.%d.%d",
2779 OperationalCodeImageVersion_GEN1.MajorVersion,
2780 OperationalCodeImageVersion_GEN1.MinorVersion,
2781 OperationalCodeImageVersion_GEN1.BuildNumber);
2782 firmware = &OperationalCodeImage_GEN1[0];
2783 FirmwareImage = &OperationalCodeImage_GEN1[0];
2784 ImageSize = sizeof(OperationalCodeImage_GEN1);
2785 break;
2786
2787 case EDGE_DOWNLOAD_FILE_80251:
2788 dbg("downloading firmware version (80251) %d.%d.%d",
2789 OperationalCodeImageVersion_GEN2.MajorVersion,
2790 OperationalCodeImageVersion_GEN2.MinorVersion,
2791 OperationalCodeImageVersion_GEN2.BuildNumber);
2792 firmware = &OperationalCodeImage_GEN2[0];
2793 FirmwareImage = &OperationalCodeImage_GEN2[0];
2794 ImageSize = sizeof(OperationalCodeImage_GEN2);
2795 break;
2796
2797 case EDGE_DOWNLOAD_FILE_NONE:
2798 dbg ("No download file specified, skipping download\n");
2799 return;
2800
2801 default:
2802 return;
2803 }
2804
2805
2806 for (;;) {
2807 record = (struct edge_firmware_image_record *)firmware;
2808 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2809 if (response < 0) {
2810 dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
2811 break;
2812 }
2813 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2814 if (firmware >= &FirmwareImage[ImageSize]) {
2815 break;
2816 }
2817 }
2818
2819 dbg("sending exec_dl_code");
2820 response = usb_control_msg (edge_serial->serial->dev,
2821 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2822 USB_REQUEST_ION_EXEC_DL_CODE,
2823 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2824
2825 return;
2826 }
2827
2828
2829 /****************************************************************************
2830 * edge_startup
2831 ****************************************************************************/
2832 static int edge_startup (struct usb_serial *serial)
2833 {
2834 struct edgeport_serial *edge_serial;
2835 struct edgeport_port *edge_port;
2836 struct usb_device *dev;
2837 int i, j;
2838 int response;
2839 bool interrupt_in_found;
2840 bool bulk_in_found;
2841 bool bulk_out_found;
2842 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2843 EDGE_COMPATIBILITY_MASK1,
2844 EDGE_COMPATIBILITY_MASK2 };
2845
2846 dev = serial->dev;
2847
2848 /* create our private serial structure */
2849 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2850 if (edge_serial == NULL) {
2851 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2852 return -ENOMEM;
2853 }
2854 spin_lock_init(&edge_serial->es_lock);
2855 edge_serial->serial = serial;
2856 usb_set_serial_data(serial, edge_serial);
2857
2858 /* get the name for the device from the device */
2859 i = get_string(dev, dev->descriptor.iManufacturer,
2860 &edge_serial->name[0], MAX_NAME_LEN+1);
2861 edge_serial->name[i++] = ' ';
2862 get_string(dev, dev->descriptor.iProduct,
2863 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2864
2865 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2866
2867 /* Read the epic descriptor */
2868 if (get_epic_descriptor(edge_serial) <= 0) {
2869 /* memcpy descriptor to Supports structures */
2870 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2871 sizeof(struct edge_compatibility_bits));
2872
2873 /* get the manufacturing descriptor for this device */
2874 get_manufacturing_desc (edge_serial);
2875
2876 /* get the boot descriptor */
2877 get_boot_desc (edge_serial);
2878
2879 get_product_info(edge_serial);
2880 }
2881
2882 /* set the number of ports from the manufacturing description */
2883 /* serial->num_ports = serial->product_info.NumPorts; */
2884 if ((!edge_serial->is_epic) &&
2885 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2886 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2887 "vs. core thinking we have %d ports, email "
2888 "greg@kroah.com this information.",
2889 edge_serial->product_info.NumPorts,
2890 serial->num_ports);
2891 }
2892
2893 dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2894
2895 /* If not an EPiC device */
2896 if (!edge_serial->is_epic) {
2897 /* now load the application firmware into this device */
2898 load_application_firmware (edge_serial);
2899
2900 dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
2901
2902 /* Check current Edgeport EEPROM and update if necessary */
2903 update_edgeport_E2PROM (edge_serial);
2904
2905 dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
2906
2907 /* set the configuration to use #1 */
2908 // dbg("set_configuration 1");
2909 // usb_set_configuration (dev, 1);
2910 }
2911
2912 /* we set up the pointers to the endpoints in the edge_open function,
2913 * as the structures aren't created yet. */
2914
2915 /* set up our port private structures */
2916 for (i = 0; i < serial->num_ports; ++i) {
2917 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
2918 if (edge_port == NULL) {
2919 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2920 for (j = 0; j < i; ++j) {
2921 kfree (usb_get_serial_port_data(serial->port[j]));
2922 usb_set_serial_port_data(serial->port[j], NULL);
2923 }
2924 usb_set_serial_data(serial, NULL);
2925 kfree(edge_serial);
2926 return -ENOMEM;
2927 }
2928 memset (edge_port, 0, sizeof(struct edgeport_port));
2929 spin_lock_init(&edge_port->ep_lock);
2930 edge_port->port = serial->port[i];
2931 usb_set_serial_port_data(serial->port[i], edge_port);
2932 }
2933
2934 response = 0;
2935
2936 if (edge_serial->is_epic) {
2937 /* EPIC thing, set up our interrupt polling now and our read urb, so
2938 * that the device knows it really is connected. */
2939 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2940 for (i = 0; i < serial->interface->altsetting[0].desc.bNumEndpoints; ++i) {
2941 struct usb_endpoint_descriptor *endpoint;
2942 int buffer_size;
2943
2944 endpoint = &serial->interface->altsetting[0].endpoint[i].desc;
2945 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2946 if (!interrupt_in_found &&
2947 (usb_endpoint_is_int_in(endpoint))) {
2948 /* we found a interrupt in endpoint */
2949 dbg("found interrupt in");
2950
2951 /* not set up yet, so do it now */
2952 edge_serial->interrupt_read_urb = usb_alloc_urb(0, GFP_KERNEL);
2953 if (!edge_serial->interrupt_read_urb) {
2954 err("out of memory");
2955 return -ENOMEM;
2956 }
2957 edge_serial->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2958 if (!edge_serial->interrupt_in_buffer) {
2959 err("out of memory");
2960 usb_free_urb(edge_serial->interrupt_read_urb);
2961 return -ENOMEM;
2962 }
2963 edge_serial->interrupt_in_endpoint = endpoint->bEndpointAddress;
2964
2965 /* set up our interrupt urb */
2966 usb_fill_int_urb(edge_serial->interrupt_read_urb,
2967 dev,
2968 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
2969 edge_serial->interrupt_in_buffer,
2970 buffer_size,
2971 edge_interrupt_callback,
2972 edge_serial,
2973 endpoint->bInterval);
2974
2975 interrupt_in_found = true;
2976 }
2977
2978 if (!bulk_in_found &&
2979 (usb_endpoint_is_bulk_in(endpoint))) {
2980 /* we found a bulk in endpoint */
2981 dbg("found bulk in");
2982
2983 /* not set up yet, so do it now */
2984 edge_serial->read_urb = usb_alloc_urb(0, GFP_KERNEL);
2985 if (!edge_serial->read_urb) {
2986 err("out of memory");
2987 return -ENOMEM;
2988 }
2989 edge_serial->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2990 if (!edge_serial->bulk_in_buffer) {
2991 err ("out of memory");
2992 usb_free_urb(edge_serial->read_urb);
2993 return -ENOMEM;
2994 }
2995 edge_serial->bulk_in_endpoint = endpoint->bEndpointAddress;
2996
2997 /* set up our bulk in urb */
2998 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2999 usb_rcvbulkpipe(dev, endpoint->bEndpointAddress),
3000 edge_serial->bulk_in_buffer,
3001 endpoint->wMaxPacketSize,
3002 edge_bulk_in_callback,
3003 edge_serial);
3004 bulk_in_found = true;
3005 }
3006
3007 if (!bulk_out_found &&
3008 (usb_endpoint_is_bulk_out(endpoint))) {
3009 /* we found a bulk out endpoint */
3010 dbg("found bulk out");
3011 edge_serial->bulk_out_endpoint = endpoint->bEndpointAddress;
3012 bulk_out_found = true;
3013 }
3014 }
3015
3016 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3017 err ("Error - the proper endpoints were not found!");
3018 return -ENODEV;
3019 }
3020
3021 /* start interrupt read for this edgeport this interrupt will
3022 * continue as long as the edgeport is connected */
3023 response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL);
3024 if (response)
3025 err("%s - Error %d submitting control urb", __FUNCTION__, response);
3026 }
3027 return response;
3028 }
3029
3030
3031 /****************************************************************************
3032 * edge_shutdown
3033 * This function is called whenever the device is removed from the usb bus.
3034 ****************************************************************************/
3035 static void edge_shutdown (struct usb_serial *serial)
3036 {
3037 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3038 int i;
3039
3040 dbg("%s", __FUNCTION__);
3041
3042 /* stop reads and writes on all ports */
3043 for (i=0; i < serial->num_ports; ++i) {
3044 kfree (usb_get_serial_port_data(serial->port[i]));
3045 usb_set_serial_port_data(serial->port[i], NULL);
3046 }
3047 /* free up our endpoint stuff */
3048 if (edge_serial->is_epic) {
3049 usb_unlink_urb(edge_serial->interrupt_read_urb);
3050 usb_free_urb(edge_serial->interrupt_read_urb);
3051 kfree(edge_serial->interrupt_in_buffer);
3052
3053 usb_unlink_urb(edge_serial->read_urb);
3054 usb_free_urb(edge_serial->read_urb);
3055 kfree(edge_serial->bulk_in_buffer);
3056 }
3057
3058 kfree(edge_serial);
3059 usb_set_serial_data(serial, NULL);
3060 }
3061
3062
3063 /****************************************************************************
3064 * edgeport_init
3065 * This is called by the module subsystem, or on startup to initialize us
3066 ****************************************************************************/
3067 static int __init edgeport_init(void)
3068 {
3069 int retval;
3070
3071 retval = usb_serial_register(&edgeport_2port_device);
3072 if (retval)
3073 goto failed_2port_device_register;
3074 retval = usb_serial_register(&edgeport_4port_device);
3075 if (retval)
3076 goto failed_4port_device_register;
3077 retval = usb_serial_register(&edgeport_8port_device);
3078 if (retval)
3079 goto failed_8port_device_register;
3080 retval = usb_serial_register(&epic_device);
3081 if (retval)
3082 goto failed_epic_device_register;
3083 retval = usb_register(&io_driver);
3084 if (retval)
3085 goto failed_usb_register;
3086 atomic_set(&CmdUrbs, 0);
3087 info(DRIVER_DESC " " DRIVER_VERSION);
3088 return 0;
3089
3090 failed_usb_register:
3091 usb_serial_deregister(&epic_device);
3092 failed_epic_device_register:
3093 usb_serial_deregister(&edgeport_8port_device);
3094 failed_8port_device_register:
3095 usb_serial_deregister(&edgeport_4port_device);
3096 failed_4port_device_register:
3097 usb_serial_deregister(&edgeport_2port_device);
3098 failed_2port_device_register:
3099 return retval;
3100 }
3101
3102
3103 /****************************************************************************
3104 * edgeport_exit
3105 * Called when the driver is about to be unloaded.
3106 ****************************************************************************/
3107 static void __exit edgeport_exit (void)
3108 {
3109 usb_deregister (&io_driver);
3110 usb_serial_deregister (&edgeport_2port_device);
3111 usb_serial_deregister (&edgeport_4port_device);
3112 usb_serial_deregister (&edgeport_8port_device);
3113 usb_serial_deregister (&epic_device);
3114 }
3115
3116 module_init(edgeport_init);
3117 module_exit(edgeport_exit);
3118
3119 /* Module information */
3120 MODULE_AUTHOR( DRIVER_AUTHOR );
3121 MODULE_DESCRIPTION( DRIVER_DESC );
3122 MODULE_LICENSE("GPL");
3123
3124 module_param(debug, bool, S_IRUGO | S_IWUSR);
3125 MODULE_PARM_DESC(debug, "Debug enabled or not");
3126
3127 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3128 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
kernel-based virtual machine