?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
initial commit with v3.6.7
[linux-3.6.7-moxart.git] / drivers / usb / serial / io_edgeport.c
blob6c22679aa776a660e5497aea51cf3b064b6d9376
1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/tty.h>
38 #include <linux/tty_driver.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/spinlock.h>
42 #include <linux/serial.h>
43 #include <linux/ioctl.h>
44 #include <linux/wait.h>
45 #include <linux/firmware.h>
46 #include <linux/ihex.h>
47 #include <linux/uaccess.h>
48 #include <linux/usb.h>
49 #include <linux/usb/serial.h>
50 #include "io_edgeport.h"
51 #include "io_ionsp.h" /* info for the iosp messages */
52 #include "io_16654.h" /* 16654 UART defines */
53
54 /*
55 * Version Information
56 */
57 #define DRIVER_VERSION "v2.7"
58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
59 #define DRIVER_DESC "Edgeport USB Serial Driver"
60
61 #define MAX_NAME_LEN 64
62
63 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
64 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
65 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
66
67 /* receive port state */
68 enum RXSTATE {
69 EXPECT_HDR1 = 0, /* Expect header byte 1 */
70 EXPECT_HDR2 = 1, /* Expect header byte 2 */
71 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
72 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
73 };
74
75
76 /* Transmit Fifo
77 * This Transmit queue is an extension of the edgeport Rx buffer.
78 * The maximum amount of data buffered in both the edgeport
79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
80 */
81 struct TxFifo {
82 unsigned int head; /* index to head pointer (write) */
83 unsigned int tail; /* index to tail pointer (read) */
84 unsigned int count; /* Bytes in queue */
85 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
86 unsigned char *fifo; /* allocated Buffer */
87 };
88
89 /* This structure holds all of the local port information */
90 struct edgeport_port {
91 __u16 txCredits; /* our current credits for this port */
92 __u16 maxTxCredits; /* the max size of the port */
93
94 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
95 struct urb *write_urb; /* write URB for this port */
96 bool write_in_progress; /* 'true' while a write URB is outstanding */
97 spinlock_t ep_lock;
98
99 __u8 shadowLCR; /* last LCR value received */
100 __u8 shadowMCR; /* last MCR value received */
101 __u8 shadowMSR; /* last MSR value received */
102 __u8 shadowLSR; /* last LSR value received */
103 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
104 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
105 __u8 validDataMask;
106 __u32 baudRate;
107
108 bool open;
109 bool openPending;
110 bool commandPending;
111 bool closePending;
112 bool chaseResponsePending;
113
114 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
115 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
116 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
117 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
118
119 struct async_icount icount;
120 struct usb_serial_port *port; /* loop back to the owner of this object */
121 };
122
123
124 /* This structure holds all of the individual device information */
125 struct edgeport_serial {
126 char name[MAX_NAME_LEN+2]; /* string name of this device */
127
128 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
129 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
130 struct edgeport_product_info product_info; /* Product Info */
131 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
132 int is_epic; /* flag if EPiC device or not */
133
134 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
135 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
136 struct urb *interrupt_read_urb; /* our interrupt urb */
137
138 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
139 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
140 struct urb *read_urb; /* our bulk read urb */
141 bool read_in_progress;
142 spinlock_t es_lock;
143
144 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
145
146 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
147
148 enum RXSTATE rxState; /* the current state of the bulk receive processor */
149 __u8 rxHeader1; /* receive header byte 1 */
150 __u8 rxHeader2; /* receive header byte 2 */
151 __u8 rxHeader3; /* receive header byte 3 */
152 __u8 rxPort; /* the port that we are currently receiving data for */
153 __u8 rxStatusCode; /* the receive status code */
154 __u8 rxStatusParam; /* the receive status paramater */
155 __s16 rxBytesRemaining; /* the number of port bytes left to read */
156 struct usb_serial *serial; /* loop back to the owner of this object */
157 };
158
159 /* baud rate information */
160 struct divisor_table_entry {
161 __u32 BaudRate;
162 __u16 Divisor;
163 };
164
165 /*
166 * Define table of divisors for Rev A EdgePort/4 hardware
167 * These assume a 3.6864MHz crystal, the standard /16, and
168 * MCR.7 = 0.
169 */
170
171 static const struct divisor_table_entry divisor_table[] = {
172 { 50, 4608},
173 { 75, 3072},
174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
176 { 150, 1536},
177 { 300, 768},
178 { 600, 384},
179 { 1200, 192},
180 { 1800, 128},
181 { 2400, 96},
182 { 4800, 48},
183 { 7200, 32},
184 { 9600, 24},
185 { 14400, 16},
186 { 19200, 12},
187 { 38400, 6},
188 { 57600, 4},
189 { 115200, 2},
190 { 230400, 1},
191 };
192
193 /* local variables */
194 static bool debug;
195
196 /* Number of outstanding Command Write Urbs */
197 static atomic_t CmdUrbs = ATOMIC_INIT(0);
198
199
200 /* local function prototypes */
201
202 /* function prototypes for all URB callbacks */
203 static void edge_interrupt_callback(struct urb *urb);
204 static void edge_bulk_in_callback(struct urb *urb);
205 static void edge_bulk_out_data_callback(struct urb *urb);
206 static void edge_bulk_out_cmd_callback(struct urb *urb);
207
208 /* function prototypes for the usbserial callbacks */
209 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
210 static void edge_close(struct usb_serial_port *port);
211 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
212 const unsigned char *buf, int count);
213 static int edge_write_room(struct tty_struct *tty);
214 static int edge_chars_in_buffer(struct tty_struct *tty);
215 static void edge_throttle(struct tty_struct *tty);
216 static void edge_unthrottle(struct tty_struct *tty);
217 static void edge_set_termios(struct tty_struct *tty,
218 struct usb_serial_port *port,
219 struct ktermios *old_termios);
220 static int edge_ioctl(struct tty_struct *tty,
221 unsigned int cmd, unsigned long arg);
222 static void edge_break(struct tty_struct *tty, int break_state);
223 static int edge_tiocmget(struct tty_struct *tty);
224 static int edge_tiocmset(struct tty_struct *tty,
225 unsigned int set, unsigned int clear);
226 static int edge_get_icount(struct tty_struct *tty,
227 struct serial_icounter_struct *icount);
228 static int edge_startup(struct usb_serial *serial);
229 static void edge_disconnect(struct usb_serial *serial);
230 static void edge_release(struct usb_serial *serial);
231 static int edge_port_probe(struct usb_serial_port *port);
232 static int edge_port_remove(struct usb_serial_port *port);
233
234 #include "io_tables.h" /* all of the devices that this driver supports */
235
236 /* function prototypes for all of our local functions */
237
238 static void process_rcvd_data(struct edgeport_serial *edge_serial,
239 unsigned char *buffer, __u16 bufferLength);
240 static void process_rcvd_status(struct edgeport_serial *edge_serial,
241 __u8 byte2, __u8 byte3);
242 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
243 unsigned char *data, int length);
244 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
245 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
246 __u8 lsr, __u8 data);
247 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
248 __u8 param);
249 static int calc_baud_rate_divisor(int baud_rate, int *divisor);
250 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
251 int baudRate);
252 static void change_port_settings(struct tty_struct *tty,
253 struct edgeport_port *edge_port,
254 struct ktermios *old_termios);
255 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
256 __u8 regNum, __u8 regValue);
257 static int write_cmd_usb(struct edgeport_port *edge_port,
258 unsigned char *buffer, int writeLength);
259 static void send_more_port_data(struct edgeport_serial *edge_serial,
260 struct edgeport_port *edge_port);
261
262 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
263 __u16 length, const __u8 *data);
264 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
265 __u16 length, __u8 *data);
266 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
267 __u16 length, const __u8 *data);
268 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
269 static void get_boot_desc(struct edgeport_serial *edge_serial);
270 static void load_application_firmware(struct edgeport_serial *edge_serial);
271
272 static void unicode_to_ascii(char *string, int buflen,
273 __le16 *unicode, int unicode_size);
274
275
276 /* ************************************************************************ */
277 /* ************************************************************************ */
278 /* ************************************************************************ */
279 /* ************************************************************************ */
280
281 /************************************************************************
282 * *
283 * update_edgeport_E2PROM() Compare current versions of *
284 * Boot ROM and Manufacture *
285 * Descriptors with versions *
286 * embedded in this driver *
287 * *
288 ************************************************************************/
289 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
290 {
291 __u32 BootCurVer;
292 __u32 BootNewVer;
293 __u8 BootMajorVersion;
294 __u8 BootMinorVersion;
295 __u16 BootBuildNumber;
296 __u32 Bootaddr;
297 const struct ihex_binrec *rec;
298 const struct firmware *fw;
299 const char *fw_name;
300 int response;
301
302 switch (edge_serial->product_info.iDownloadFile) {
303 case EDGE_DOWNLOAD_FILE_I930:
304 fw_name = "edgeport/boot.fw";
305 break;
306 case EDGE_DOWNLOAD_FILE_80251:
307 fw_name = "edgeport/boot2.fw";
308 break;
309 default:
310 return;
311 }
312
313 response = request_ihex_firmware(&fw, fw_name,
314 &edge_serial->serial->dev->dev);
315 if (response) {
316 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
317 fw_name, response);
318 return;
319 }
320
321 rec = (const struct ihex_binrec *)fw->data;
322 BootMajorVersion = rec->data[0];
323 BootMinorVersion = rec->data[1];
324 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
325
326 /* Check Boot Image Version */
327 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
328 (edge_serial->boot_descriptor.MinorVersion << 16) +
329 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
330
331 BootNewVer = (BootMajorVersion << 24) +
332 (BootMinorVersion << 16) +
333 BootBuildNumber;
334
335 dbg("Current Boot Image version %d.%d.%d",
336 edge_serial->boot_descriptor.MajorVersion,
337 edge_serial->boot_descriptor.MinorVersion,
338 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
339
340
341 if (BootNewVer > BootCurVer) {
342 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
343 edge_serial->boot_descriptor.MajorVersion,
344 edge_serial->boot_descriptor.MinorVersion,
345 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
346 BootMajorVersion, BootMinorVersion, BootBuildNumber);
347
348 dbg("Downloading new Boot Image");
349
350 for (rec = ihex_next_binrec(rec); rec;
351 rec = ihex_next_binrec(rec)) {
352 Bootaddr = be32_to_cpu(rec->addr);
353 response = rom_write(edge_serial->serial,
354 Bootaddr >> 16,
355 Bootaddr & 0xFFFF,
356 be16_to_cpu(rec->len),
357 &rec->data[0]);
358 if (response < 0) {
359 dev_err(&edge_serial->serial->dev->dev,
360 "rom_write failed (%x, %x, %d)\n",
361 Bootaddr >> 16, Bootaddr & 0xFFFF,
362 be16_to_cpu(rec->len));
363 break;
364 }
365 }
366 } else {
367 dbg("Boot Image -- already up to date");
368 }
369 release_firmware(fw);
370 }
371
372 #if 0
373 /************************************************************************
374 *
375 * Get string descriptor from device
376 *
377 ************************************************************************/
378 static int get_string_desc(struct usb_device *dev, int Id,
379 struct usb_string_descriptor **pRetDesc)
380 {
381 struct usb_string_descriptor StringDesc;
382 struct usb_string_descriptor *pStringDesc;
383
384 dbg("%s - USB String ID = %d", __func__, Id);
385
386 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
387 sizeof(StringDesc)))
388 return 0;
389
390 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
391 if (!pStringDesc)
392 return -1;
393
394 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
395 StringDesc.bLength)) {
396 kfree(pStringDesc);
397 return -1;
398 }
399
400 *pRetDesc = pStringDesc;
401 return 0;
402 }
403 #endif
404
405 static void dump_product_info(struct edgeport_product_info *product_info)
406 {
407 /* Dump Product Info structure */
408 dbg("**Product Information:");
409 dbg(" ProductId %x", product_info->ProductId);
410 dbg(" NumPorts %d", product_info->NumPorts);
411 dbg(" ProdInfoVer %d", product_info->ProdInfoVer);
412 dbg(" IsServer %d", product_info->IsServer);
413 dbg(" IsRS232 %d", product_info->IsRS232);
414 dbg(" IsRS422 %d", product_info->IsRS422);
415 dbg(" IsRS485 %d", product_info->IsRS485);
416 dbg(" RomSize %d", product_info->RomSize);
417 dbg(" RamSize %d", product_info->RamSize);
418 dbg(" CpuRev %x", product_info->CpuRev);
419 dbg(" BoardRev %x", product_info->BoardRev);
420 dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion,
421 product_info->BootMinorVersion,
422 le16_to_cpu(product_info->BootBuildNumber));
423 dbg(" FirmwareMajorVersion %d.%d.%d",
424 product_info->FirmwareMajorVersion,
425 product_info->FirmwareMinorVersion,
426 le16_to_cpu(product_info->FirmwareBuildNumber));
427 dbg(" ManufactureDescDate %d/%d/%d",
428 product_info->ManufactureDescDate[0],
429 product_info->ManufactureDescDate[1],
430 product_info->ManufactureDescDate[2]+1900);
431 dbg(" iDownloadFile 0x%x", product_info->iDownloadFile);
432 dbg(" EpicVer %d", product_info->EpicVer);
433 }
434
435 static void get_product_info(struct edgeport_serial *edge_serial)
436 {
437 struct edgeport_product_info *product_info = &edge_serial->product_info;
438
439 memset(product_info, 0, sizeof(struct edgeport_product_info));
440
441 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
442 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
443 product_info->ProdInfoVer = 0;
444
445 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
446 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
447 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
448 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
449
450 product_info->BootMajorVersion =
451 edge_serial->boot_descriptor.MajorVersion;
452 product_info->BootMinorVersion =
453 edge_serial->boot_descriptor.MinorVersion;
454 product_info->BootBuildNumber =
455 edge_serial->boot_descriptor.BuildNumber;
456
457 memcpy(product_info->ManufactureDescDate,
458 edge_serial->manuf_descriptor.DescDate,
459 sizeof(edge_serial->manuf_descriptor.DescDate));
460
461 /* check if this is 2nd generation hardware */
462 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
463 & ION_DEVICE_ID_80251_NETCHIP)
464 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
465 else
466 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
467
468 /* Determine Product type and set appropriate flags */
469 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
470 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
471 case ION_DEVICE_ID_EDGEPORT_4T:
472 case ION_DEVICE_ID_EDGEPORT_4:
473 case ION_DEVICE_ID_EDGEPORT_2:
474 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
475 case ION_DEVICE_ID_EDGEPORT_8:
476 case ION_DEVICE_ID_EDGEPORT_421:
477 case ION_DEVICE_ID_EDGEPORT_21:
478 case ION_DEVICE_ID_EDGEPORT_2_DIN:
479 case ION_DEVICE_ID_EDGEPORT_4_DIN:
480 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
481 product_info->IsRS232 = 1;
482 break;
483
484 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
485 product_info->IsRS422 = 1;
486 product_info->IsRS485 = 1;
487 break;
488
489 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
490 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
491 product_info->IsRS422 = 1;
492 break;
493 }
494
495 dump_product_info(product_info);
496 }
497
498 static int get_epic_descriptor(struct edgeport_serial *ep)
499 {
500 int result;
501 struct usb_serial *serial = ep->serial;
502 struct edgeport_product_info *product_info = &ep->product_info;
503 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
504 struct edge_compatibility_bits *bits;
505
506 ep->is_epic = 0;
507 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
508 USB_REQUEST_ION_GET_EPIC_DESC,
509 0xC0, 0x00, 0x00,
510 &ep->epic_descriptor,
511 sizeof(struct edge_compatibility_descriptor),
512 300);
513
514 dbg("%s result = %d", __func__, result);
515
516 if (result > 0) {
517 ep->is_epic = 1;
518 memset(product_info, 0, sizeof(struct edgeport_product_info));
519
520 product_info->NumPorts = epic->NumPorts;
521 product_info->ProdInfoVer = 0;
522 product_info->FirmwareMajorVersion = epic->MajorVersion;
523 product_info->FirmwareMinorVersion = epic->MinorVersion;
524 product_info->FirmwareBuildNumber = epic->BuildNumber;
525 product_info->iDownloadFile = epic->iDownloadFile;
526 product_info->EpicVer = epic->EpicVer;
527 product_info->Epic = epic->Supports;
528 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
529 dump_product_info(product_info);
530
531 bits = &ep->epic_descriptor.Supports;
532 dbg("**EPIC descriptor:");
533 dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE");
534 dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE");
535 dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE");
536 dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE");
537 dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
538 dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
539 dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE");
540 dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE");
541 dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
542 dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE");
543 dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE");
544 dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
545 dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE");
546 }
547
548 return result;
549 }
550
551
552 /************************************************************************/
553 /************************************************************************/
554 /* U S B C A L L B A C K F U N C T I O N S */
555 /* U S B C A L L B A C K F U N C T I O N S */
556 /************************************************************************/
557 /************************************************************************/
558
559 /*****************************************************************************
560 * edge_interrupt_callback
561 * this is the callback function for when we have received data on the
562 * interrupt endpoint.
563 *****************************************************************************/
564 static void edge_interrupt_callback(struct urb *urb)
565 {
566 struct edgeport_serial *edge_serial = urb->context;
567 struct edgeport_port *edge_port;
568 struct usb_serial_port *port;
569 struct tty_struct *tty;
570 unsigned char *data = urb->transfer_buffer;
571 int length = urb->actual_length;
572 int bytes_avail;
573 int position;
574 int txCredits;
575 int portNumber;
576 int result;
577 int status = urb->status;
578
579 dbg("%s", __func__);
580
581 switch (status) {
582 case 0:
583 /* success */
584 break;
585 case -ECONNRESET:
586 case -ENOENT:
587 case -ESHUTDOWN:
588 /* this urb is terminated, clean up */
589 dbg("%s - urb shutting down with status: %d",
590 __func__, status);
591 return;
592 default:
593 dbg("%s - nonzero urb status received: %d", __func__, status);
594 goto exit;
595 }
596
597 /* process this interrupt-read even if there are no ports open */
598 if (length) {
599 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
600 __func__, length, data);
601
602 if (length > 1) {
603 bytes_avail = data[0] | (data[1] << 8);
604 if (bytes_avail) {
605 spin_lock(&edge_serial->es_lock);
606 edge_serial->rxBytesAvail += bytes_avail;
607 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
608
609 if (edge_serial->rxBytesAvail > 0 &&
610 !edge_serial->read_in_progress) {
611 dbg("%s - posting a read", __func__);
612 edge_serial->read_in_progress = true;
613
614 /* we have pending bytes on the
615 bulk in pipe, send a request */
616 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
617 if (result) {
618 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
619 edge_serial->read_in_progress = false;
620 }
621 }
622 spin_unlock(&edge_serial->es_lock);
623 }
624 }
625 /* grab the txcredits for the ports if available */
626 position = 2;
627 portNumber = 0;
628 while ((position < length) &&
629 (portNumber < edge_serial->serial->num_ports)) {
630 txCredits = data[position] | (data[position+1] << 8);
631 if (txCredits) {
632 port = edge_serial->serial->port[portNumber];
633 edge_port = usb_get_serial_port_data(port);
634 if (edge_port->open) {
635 spin_lock(&edge_port->ep_lock);
636 edge_port->txCredits += txCredits;
637 spin_unlock(&edge_port->ep_lock);
638 dbg("%s - txcredits for port%d = %d",
639 __func__, portNumber,
640 edge_port->txCredits);
641
642 /* tell the tty driver that something
643 has changed */
644 tty = tty_port_tty_get(
645 &edge_port->port->port);
646 if (tty) {
647 tty_wakeup(tty);
648 tty_kref_put(tty);
649 }
650 /* Since we have more credit, check
651 if more data can be sent */
652 send_more_port_data(edge_serial,
653 edge_port);
654 }
655 }
656 position += 2;
657 ++portNumber;
658 }
659 }
660
661 exit:
662 result = usb_submit_urb(urb, GFP_ATOMIC);
663 if (result)
664 dev_err(&urb->dev->dev,
665 "%s - Error %d submitting control urb\n",
666 __func__, result);
667 }
668
669
670 /*****************************************************************************
671 * edge_bulk_in_callback
672 * this is the callback function for when we have received data on the
673 * bulk in endpoint.
674 *****************************************************************************/
675 static void edge_bulk_in_callback(struct urb *urb)
676 {
677 struct edgeport_serial *edge_serial = urb->context;
678 unsigned char *data = urb->transfer_buffer;
679 int retval;
680 __u16 raw_data_length;
681 int status = urb->status;
682
683 dbg("%s", __func__);
684
685 if (status) {
686 dbg("%s - nonzero read bulk status received: %d",
687 __func__, status);
688 edge_serial->read_in_progress = false;
689 return;
690 }
691
692 if (urb->actual_length == 0) {
693 dbg("%s - read bulk callback with no data", __func__);
694 edge_serial->read_in_progress = false;
695 return;
696 }
697
698 raw_data_length = urb->actual_length;
699
700 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
701 __func__, raw_data_length, data);
702
703 spin_lock(&edge_serial->es_lock);
704
705 /* decrement our rxBytes available by the number that we just got */
706 edge_serial->rxBytesAvail -= raw_data_length;
707
708 dbg("%s - Received = %d, rxBytesAvail %d", __func__,
709 raw_data_length, edge_serial->rxBytesAvail);
710
711 process_rcvd_data(edge_serial, data, urb->actual_length);
712
713 /* check to see if there's any more data for us to read */
714 if (edge_serial->rxBytesAvail > 0) {
715 dbg("%s - posting a read", __func__);
716 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
717 if (retval) {
718 dev_err(&urb->dev->dev,
719 "%s - usb_submit_urb(read bulk) failed, "
720 "retval = %d\n", __func__, retval);
721 edge_serial->read_in_progress = false;
722 }
723 } else {
724 edge_serial->read_in_progress = false;
725 }
726
727 spin_unlock(&edge_serial->es_lock);
728 }
729
730
731 /*****************************************************************************
732 * edge_bulk_out_data_callback
733 * this is the callback function for when we have finished sending
734 * serial data on the bulk out endpoint.
735 *****************************************************************************/
736 static void edge_bulk_out_data_callback(struct urb *urb)
737 {
738 struct edgeport_port *edge_port = urb->context;
739 struct tty_struct *tty;
740 int status = urb->status;
741
742 dbg("%s", __func__);
743
744 if (status) {
745 dbg("%s - nonzero write bulk status received: %d",
746 __func__, status);
747 }
748
749 tty = tty_port_tty_get(&edge_port->port->port);
750
751 if (tty && edge_port->open) {
752 /* let the tty driver wakeup if it has a special
753 write_wakeup function */
754 tty_wakeup(tty);
755 }
756 tty_kref_put(tty);
757
758 /* Release the Write URB */
759 edge_port->write_in_progress = false;
760
761 /* Check if more data needs to be sent */
762 send_more_port_data((struct edgeport_serial *)
763 (usb_get_serial_data(edge_port->port->serial)), edge_port);
764 }
765
766
767 /*****************************************************************************
768 * BulkOutCmdCallback
769 * this is the callback function for when we have finished sending a
770 * command on the bulk out endpoint.
771 *****************************************************************************/
772 static void edge_bulk_out_cmd_callback(struct urb *urb)
773 {
774 struct edgeport_port *edge_port = urb->context;
775 struct tty_struct *tty;
776 int status = urb->status;
777
778 dbg("%s", __func__);
779
780 atomic_dec(&CmdUrbs);
781 dbg("%s - FREE URB %p (outstanding %d)", __func__,
782 urb, atomic_read(&CmdUrbs));
783
784
785 /* clean up the transfer buffer */
786 kfree(urb->transfer_buffer);
787
788 /* Free the command urb */
789 usb_free_urb(urb);
790
791 if (status) {
792 dbg("%s - nonzero write bulk status received: %d",
793 __func__, status);
794 return;
795 }
796
797 /* Get pointer to tty */
798 tty = tty_port_tty_get(&edge_port->port->port);
799
800 /* tell the tty driver that something has changed */
801 if (tty && edge_port->open)
802 tty_wakeup(tty);
803 tty_kref_put(tty);
804
805 /* we have completed the command */
806 edge_port->commandPending = false;
807 wake_up(&edge_port->wait_command);
808 }
809
810
811 /*****************************************************************************
812 * Driver tty interface functions
813 *****************************************************************************/
814
815 /*****************************************************************************
816 * SerialOpen
817 * this function is called by the tty driver when a port is opened
818 * If successful, we return 0
819 * Otherwise we return a negative error number.
820 *****************************************************************************/
821 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
822 {
823 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
824 struct usb_serial *serial;
825 struct edgeport_serial *edge_serial;
826 int response;
827
828 dbg("%s - port %d", __func__, port->number);
829
830 if (edge_port == NULL)
831 return -ENODEV;
832
833 /* see if we've set up our endpoint info yet (can't set it up
834 in edge_startup as the structures were not set up at that time.) */
835 serial = port->serial;
836 edge_serial = usb_get_serial_data(serial);
837 if (edge_serial == NULL)
838 return -ENODEV;
839 if (edge_serial->interrupt_in_buffer == NULL) {
840 struct usb_serial_port *port0 = serial->port[0];
841
842 /* not set up yet, so do it now */
843 edge_serial->interrupt_in_buffer =
844 port0->interrupt_in_buffer;
845 edge_serial->interrupt_in_endpoint =
846 port0->interrupt_in_endpointAddress;
847 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
848 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
849 edge_serial->bulk_in_endpoint =
850 port0->bulk_in_endpointAddress;
851 edge_serial->read_urb = port0->read_urb;
852 edge_serial->bulk_out_endpoint =
853 port0->bulk_out_endpointAddress;
854
855 /* set up our interrupt urb */
856 usb_fill_int_urb(edge_serial->interrupt_read_urb,
857 serial->dev,
858 usb_rcvintpipe(serial->dev,
859 port0->interrupt_in_endpointAddress),
860 port0->interrupt_in_buffer,
861 edge_serial->interrupt_read_urb->transfer_buffer_length,
862 edge_interrupt_callback, edge_serial,
863 edge_serial->interrupt_read_urb->interval);
864
865 /* set up our bulk in urb */
866 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
867 usb_rcvbulkpipe(serial->dev,
868 port0->bulk_in_endpointAddress),
869 port0->bulk_in_buffer,
870 edge_serial->read_urb->transfer_buffer_length,
871 edge_bulk_in_callback, edge_serial);
872 edge_serial->read_in_progress = false;
873
874 /* start interrupt read for this edgeport
875 * this interrupt will continue as long
876 * as the edgeport is connected */
877 response = usb_submit_urb(edge_serial->interrupt_read_urb,
878 GFP_KERNEL);
879 if (response) {
880 dev_err(&port->dev,
881 "%s - Error %d submitting control urb\n",
882 __func__, response);
883 }
884 }
885
886 /* initialize our wait queues */
887 init_waitqueue_head(&edge_port->wait_open);
888 init_waitqueue_head(&edge_port->wait_chase);
889 init_waitqueue_head(&edge_port->delta_msr_wait);
890 init_waitqueue_head(&edge_port->wait_command);
891
892 /* initialize our icount structure */
893 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
894
895 /* initialize our port settings */
896 edge_port->txCredits = 0; /* Can't send any data yet */
897 /* Must always set this bit to enable ints! */
898 edge_port->shadowMCR = MCR_MASTER_IE;
899 edge_port->chaseResponsePending = false;
900
901 /* send a open port command */
902 edge_port->openPending = true;
903 edge_port->open = false;
904 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
905
906 if (response < 0) {
907 dev_err(&port->dev, "%s - error sending open port command\n",
908 __func__);
909 edge_port->openPending = false;
910 return -ENODEV;
911 }
912
913 /* now wait for the port to be completely opened */
914 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
915 OPEN_TIMEOUT);
916
917 if (!edge_port->open) {
918 /* open timed out */
919 dbg("%s - open timedout", __func__);
920 edge_port->openPending = false;
921 return -ENODEV;
922 }
923
924 /* create the txfifo */
925 edge_port->txfifo.head = 0;
926 edge_port->txfifo.tail = 0;
927 edge_port->txfifo.count = 0;
928 edge_port->txfifo.size = edge_port->maxTxCredits;
929 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
930
931 if (!edge_port->txfifo.fifo) {
932 dbg("%s - no memory", __func__);
933 edge_close(port);
934 return -ENOMEM;
935 }
936
937 /* Allocate a URB for the write */
938 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
939 edge_port->write_in_progress = false;
940
941 if (!edge_port->write_urb) {
942 dbg("%s - no memory", __func__);
943 edge_close(port);
944 return -ENOMEM;
945 }
946
947 dbg("%s(%d) - Initialize TX fifo to %d bytes",
948 __func__, port->number, edge_port->maxTxCredits);
949
950 dbg("%s exited", __func__);
951
952 return 0;
953 }
954
955
956 /************************************************************************
957 *
958 * block_until_chase_response
959 *
960 * This function will block the close until one of the following:
961 * 1. Response to our Chase comes from Edgeport
962 * 2. A timeout of 10 seconds without activity has expired
963 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
964 *
965 ************************************************************************/
966 static void block_until_chase_response(struct edgeport_port *edge_port)
967 {
968 DEFINE_WAIT(wait);
969 __u16 lastCredits;
970 int timeout = 1*HZ;
971 int loop = 10;
972
973 while (1) {
974 /* Save Last credits */
975 lastCredits = edge_port->txCredits;
976
977 /* Did we get our Chase response */
978 if (!edge_port->chaseResponsePending) {
979 dbg("%s - Got Chase Response", __func__);
980
981 /* did we get all of our credit back? */
982 if (edge_port->txCredits == edge_port->maxTxCredits) {
983 dbg("%s - Got all credits", __func__);
984 return;
985 }
986 }
987
988 /* Block the thread for a while */
989 prepare_to_wait(&edge_port->wait_chase, &wait,
990 TASK_UNINTERRUPTIBLE);
991 schedule_timeout(timeout);
992 finish_wait(&edge_port->wait_chase, &wait);
993
994 if (lastCredits == edge_port->txCredits) {
995 /* No activity.. count down. */
996 loop--;
997 if (loop == 0) {
998 edge_port->chaseResponsePending = false;
999 dbg("%s - Chase TIMEOUT", __func__);
1000 return;
1001 }
1002 } else {
1003 /* Reset timeout value back to 10 seconds */
1004 dbg("%s - Last %d, Current %d", __func__,
1005 lastCredits, edge_port->txCredits);
1006 loop = 10;
1007 }
1008 }
1009 }
1010
1011
1012 /************************************************************************
1013 *
1014 * block_until_tx_empty
1015 *
1016 * This function will block the close until one of the following:
1017 * 1. TX count are 0
1018 * 2. The edgeport has stopped
1019 * 3. A timeout of 3 seconds without activity has expired
1020 *
1021 ************************************************************************/
1022 static void block_until_tx_empty(struct edgeport_port *edge_port)
1023 {
1024 DEFINE_WAIT(wait);
1025 struct TxFifo *fifo = &edge_port->txfifo;
1026 __u32 lastCount;
1027 int timeout = HZ/10;
1028 int loop = 30;
1029
1030 while (1) {
1031 /* Save Last count */
1032 lastCount = fifo->count;
1033
1034 /* Is the Edgeport Buffer empty? */
1035 if (lastCount == 0) {
1036 dbg("%s - TX Buffer Empty", __func__);
1037 return;
1038 }
1039
1040 /* Block the thread for a while */
1041 prepare_to_wait(&edge_port->wait_chase, &wait,
1042 TASK_UNINTERRUPTIBLE);
1043 schedule_timeout(timeout);
1044 finish_wait(&edge_port->wait_chase, &wait);
1045
1046 dbg("%s wait", __func__);
1047
1048 if (lastCount == fifo->count) {
1049 /* No activity.. count down. */
1050 loop--;
1051 if (loop == 0) {
1052 dbg("%s - TIMEOUT", __func__);
1053 return;
1054 }
1055 } else {
1056 /* Reset timeout value back to seconds */
1057 loop = 30;
1058 }
1059 }
1060 }
1061
1062
1063 /*****************************************************************************
1064 * edge_close
1065 * this function is called by the tty driver when a port is closed
1066 *****************************************************************************/
1067 static void edge_close(struct usb_serial_port *port)
1068 {
1069 struct edgeport_serial *edge_serial;
1070 struct edgeport_port *edge_port;
1071 int status;
1072
1073 dbg("%s - port %d", __func__, port->number);
1074
1075 edge_serial = usb_get_serial_data(port->serial);
1076 edge_port = usb_get_serial_port_data(port);
1077 if (edge_serial == NULL || edge_port == NULL)
1078 return;
1079
1080 /* block until tx is empty */
1081 block_until_tx_empty(edge_port);
1082
1083 edge_port->closePending = true;
1084
1085 if ((!edge_serial->is_epic) ||
1086 ((edge_serial->is_epic) &&
1087 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1088 /* flush and chase */
1089 edge_port->chaseResponsePending = true;
1090
1091 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1092 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1093 if (status == 0)
1094 /* block until chase finished */
1095 block_until_chase_response(edge_port);
1096 else
1097 edge_port->chaseResponsePending = false;
1098 }
1099
1100 if ((!edge_serial->is_epic) ||
1101 ((edge_serial->is_epic) &&
1102 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1103 /* close the port */
1104 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1105 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1106 }
1107
1108 /* port->close = true; */
1109 edge_port->closePending = false;
1110 edge_port->open = false;
1111 edge_port->openPending = false;
1112
1113 usb_kill_urb(edge_port->write_urb);
1114
1115 if (edge_port->write_urb) {
1116 /* if this urb had a transfer buffer already
1117 (old transfer) free it */
1118 kfree(edge_port->write_urb->transfer_buffer);
1119 usb_free_urb(edge_port->write_urb);
1120 edge_port->write_urb = NULL;
1121 }
1122 kfree(edge_port->txfifo.fifo);
1123 edge_port->txfifo.fifo = NULL;
1124
1125 dbg("%s exited", __func__);
1126 }
1127
1128 /*****************************************************************************
1129 * SerialWrite
1130 * this function is called by the tty driver when data should be written
1131 * to the port.
1132 * If successful, we return the number of bytes written, otherwise we
1133 * return a negative error number.
1134 *****************************************************************************/
1135 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1136 const unsigned char *data, int count)
1137 {
1138 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1139 struct TxFifo *fifo;
1140 int copySize;
1141 int bytesleft;
1142 int firsthalf;
1143 int secondhalf;
1144 unsigned long flags;
1145
1146 dbg("%s - port %d", __func__, port->number);
1147
1148 if (edge_port == NULL)
1149 return -ENODEV;
1150
1151 /* get a pointer to the Tx fifo */
1152 fifo = &edge_port->txfifo;
1153
1154 spin_lock_irqsave(&edge_port->ep_lock, flags);
1155
1156 /* calculate number of bytes to put in fifo */
1157 copySize = min((unsigned int)count,
1158 (edge_port->txCredits - fifo->count));
1159
1160 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes",
1161 __func__, port->number, count,
1162 edge_port->txCredits - fifo->count, copySize);
1163
1164 /* catch writes of 0 bytes which the tty driver likes to give us,
1165 and when txCredits is empty */
1166 if (copySize == 0) {
1167 dbg("%s - copySize = Zero", __func__);
1168 goto finish_write;
1169 }
1170
1171 /* queue the data
1172 * since we can never overflow the buffer we do not have to check for a
1173 * full condition
1174 *
1175 * the copy is done is two parts -- first fill to the end of the buffer
1176 * then copy the reset from the start of the buffer
1177 */
1178 bytesleft = fifo->size - fifo->head;
1179 firsthalf = min(bytesleft, copySize);
1180 dbg("%s - copy %d bytes of %d into fifo ", __func__,
1181 firsthalf, bytesleft);
1182
1183 /* now copy our data */
1184 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1185 usb_serial_debug_data(debug, &port->dev, __func__,
1186 firsthalf, &fifo->fifo[fifo->head]);
1187
1188 /* update the index and size */
1189 fifo->head += firsthalf;
1190 fifo->count += firsthalf;
1191
1192 /* wrap the index */
1193 if (fifo->head == fifo->size)
1194 fifo->head = 0;
1195
1196 secondhalf = copySize-firsthalf;
1197
1198 if (secondhalf) {
1199 dbg("%s - copy rest of data %d", __func__, secondhalf);
1200 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1201 usb_serial_debug_data(debug, &port->dev, __func__,
1202 secondhalf, &fifo->fifo[fifo->head]);
1203 /* update the index and size */
1204 fifo->count += secondhalf;
1205 fifo->head += secondhalf;
1206 /* No need to check for wrap since we can not get to end of
1207 * the fifo in this part
1208 */
1209 }
1210
1211 finish_write:
1212 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1213
1214 send_more_port_data((struct edgeport_serial *)
1215 usb_get_serial_data(port->serial), edge_port);
1216
1217 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1218 copySize, edge_port->txCredits, fifo->count);
1219
1220 return copySize;
1221 }
1222
1223
1224 /************************************************************************
1225 *
1226 * send_more_port_data()
1227 *
1228 * This routine attempts to write additional UART transmit data
1229 * to a port over the USB bulk pipe. It is called (1) when new
1230 * data has been written to a port's TxBuffer from higher layers
1231 * (2) when the peripheral sends us additional TxCredits indicating
1232 * that it can accept more Tx data for a given port; and (3) when
1233 * a bulk write completes successfully and we want to see if we
1234 * can transmit more.
1235 *
1236 ************************************************************************/
1237 static void send_more_port_data(struct edgeport_serial *edge_serial,
1238 struct edgeport_port *edge_port)
1239 {
1240 struct TxFifo *fifo = &edge_port->txfifo;
1241 struct urb *urb;
1242 unsigned char *buffer;
1243 int status;
1244 int count;
1245 int bytesleft;
1246 int firsthalf;
1247 int secondhalf;
1248 unsigned long flags;
1249
1250 dbg("%s(%d)", __func__, edge_port->port->number);
1251
1252 spin_lock_irqsave(&edge_port->ep_lock, flags);
1253
1254 if (edge_port->write_in_progress ||
1255 !edge_port->open ||
1256 (fifo->count == 0)) {
1257 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1258 __func__, edge_port->port->number,
1259 fifo->count, edge_port->write_in_progress);
1260 goto exit_send;
1261 }
1262
1263 /* since the amount of data in the fifo will always fit into the
1264 * edgeport buffer we do not need to check the write length
1265 *
1266 * Do we have enough credits for this port to make it worthwhile
1267 * to bother queueing a write. If it's too small, say a few bytes,
1268 * it's better to wait for more credits so we can do a larger write.
1269 */
1270 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1271 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1272 __func__, edge_port->port->number, fifo->count,
1273 edge_port->txCredits);
1274 goto exit_send;
1275 }
1276
1277 /* lock this write */
1278 edge_port->write_in_progress = true;
1279
1280 /* get a pointer to the write_urb */
1281 urb = edge_port->write_urb;
1282
1283 /* make sure transfer buffer is freed */
1284 kfree(urb->transfer_buffer);
1285 urb->transfer_buffer = NULL;
1286
1287 /* build the data header for the buffer and port that we are about
1288 to send out */
1289 count = fifo->count;
1290 buffer = kmalloc(count+2, GFP_ATOMIC);
1291 if (buffer == NULL) {
1292 dev_err_console(edge_port->port,
1293 "%s - no more kernel memory...\n", __func__);
1294 edge_port->write_in_progress = false;
1295 goto exit_send;
1296 }
1297 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1298 - edge_port->port->serial->minor, count);
1299 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1300 - edge_port->port->serial->minor, count);
1301
1302 /* now copy our data */
1303 bytesleft = fifo->size - fifo->tail;
1304 firsthalf = min(bytesleft, count);
1305 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1306 fifo->tail += firsthalf;
1307 fifo->count -= firsthalf;
1308 if (fifo->tail == fifo->size)
1309 fifo->tail = 0;
1310
1311 secondhalf = count-firsthalf;
1312 if (secondhalf) {
1313 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1314 secondhalf);
1315 fifo->tail += secondhalf;
1316 fifo->count -= secondhalf;
1317 }
1318
1319 if (count)
1320 usb_serial_debug_data(debug, &edge_port->port->dev,
1321 __func__, count, &buffer[2]);
1322
1323 /* fill up the urb with all of our data and submit it */
1324 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1325 usb_sndbulkpipe(edge_serial->serial->dev,
1326 edge_serial->bulk_out_endpoint),
1327 buffer, count+2,
1328 edge_bulk_out_data_callback, edge_port);
1329
1330 /* decrement the number of credits we have by the number we just sent */
1331 edge_port->txCredits -= count;
1332 edge_port->icount.tx += count;
1333
1334 status = usb_submit_urb(urb, GFP_ATOMIC);
1335 if (status) {
1336 /* something went wrong */
1337 dev_err_console(edge_port->port,
1338 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1339 __func__, status);
1340 edge_port->write_in_progress = false;
1341
1342 /* revert the credits as something bad happened. */
1343 edge_port->txCredits += count;
1344 edge_port->icount.tx -= count;
1345 }
1346 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1347 __func__, count, edge_port->txCredits, fifo->count);
1348
1349 exit_send:
1350 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1351 }
1352
1353
1354 /*****************************************************************************
1355 * edge_write_room
1356 * this function is called by the tty driver when it wants to know how
1357 * many bytes of data we can accept for a specific port. If successful,
1358 * we return the amount of room that we have for this port (the txCredits)
1359 * otherwise we return a negative error number.
1360 *****************************************************************************/
1361 static int edge_write_room(struct tty_struct *tty)
1362 {
1363 struct usb_serial_port *port = tty->driver_data;
1364 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1365 int room;
1366 unsigned long flags;
1367
1368 dbg("%s", __func__);
1369
1370 if (edge_port == NULL)
1371 return 0;
1372 if (edge_port->closePending)
1373 return 0;
1374
1375 dbg("%s - port %d", __func__, port->number);
1376
1377 if (!edge_port->open) {
1378 dbg("%s - port not opened", __func__);
1379 return 0;
1380 }
1381
1382 /* total of both buffers is still txCredit */
1383 spin_lock_irqsave(&edge_port->ep_lock, flags);
1384 room = edge_port->txCredits - edge_port->txfifo.count;
1385 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1386
1387 dbg("%s - returns %d", __func__, room);
1388 return room;
1389 }
1390
1391
1392 /*****************************************************************************
1393 * edge_chars_in_buffer
1394 * this function is called by the tty driver when it wants to know how
1395 * many bytes of data we currently have outstanding in the port (data that
1396 * has been written, but hasn't made it out the port yet)
1397 * If successful, we return the number of bytes left to be written in the
1398 * system,
1399 * Otherwise we return a negative error number.
1400 *****************************************************************************/
1401 static int edge_chars_in_buffer(struct tty_struct *tty)
1402 {
1403 struct usb_serial_port *port = tty->driver_data;
1404 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1405 int num_chars;
1406 unsigned long flags;
1407
1408 dbg("%s", __func__);
1409
1410 if (edge_port == NULL)
1411 return 0;
1412 if (edge_port->closePending)
1413 return 0;
1414
1415 if (!edge_port->open) {
1416 dbg("%s - port not opened", __func__);
1417 return 0;
1418 }
1419
1420 spin_lock_irqsave(&edge_port->ep_lock, flags);
1421 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1422 edge_port->txfifo.count;
1423 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1424 if (num_chars) {
1425 dbg("%s(port %d) - returns %d", __func__,
1426 port->number, num_chars);
1427 }
1428
1429 return num_chars;
1430 }
1431
1432
1433 /*****************************************************************************
1434 * SerialThrottle
1435 * this function is called by the tty driver when it wants to stop the data
1436 * being read from the port.
1437 *****************************************************************************/
1438 static void edge_throttle(struct tty_struct *tty)
1439 {
1440 struct usb_serial_port *port = tty->driver_data;
1441 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1442 int status;
1443
1444 dbg("%s - port %d", __func__, port->number);
1445
1446 if (edge_port == NULL)
1447 return;
1448
1449 if (!edge_port->open) {
1450 dbg("%s - port not opened", __func__);
1451 return;
1452 }
1453
1454 /* if we are implementing XON/XOFF, send the stop character */
1455 if (I_IXOFF(tty)) {
1456 unsigned char stop_char = STOP_CHAR(tty);
1457 status = edge_write(tty, port, &stop_char, 1);
1458 if (status <= 0)
1459 return;
1460 }
1461
1462 /* if we are implementing RTS/CTS, toggle that line */
1463 if (tty->termios->c_cflag & CRTSCTS) {
1464 edge_port->shadowMCR &= ~MCR_RTS;
1465 status = send_cmd_write_uart_register(edge_port, MCR,
1466 edge_port->shadowMCR);
1467 if (status != 0)
1468 return;
1469 }
1470 }
1471
1472
1473 /*****************************************************************************
1474 * edge_unthrottle
1475 * this function is called by the tty driver when it wants to resume the
1476 * data being read from the port (called after SerialThrottle is called)
1477 *****************************************************************************/
1478 static void edge_unthrottle(struct tty_struct *tty)
1479 {
1480 struct usb_serial_port *port = tty->driver_data;
1481 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1482 int status;
1483
1484 dbg("%s - port %d", __func__, port->number);
1485
1486 if (edge_port == NULL)
1487 return;
1488
1489 if (!edge_port->open) {
1490 dbg("%s - port not opened", __func__);
1491 return;
1492 }
1493
1494 /* if we are implementing XON/XOFF, send the start character */
1495 if (I_IXOFF(tty)) {
1496 unsigned char start_char = START_CHAR(tty);
1497 status = edge_write(tty, port, &start_char, 1);
1498 if (status <= 0)
1499 return;
1500 }
1501 /* if we are implementing RTS/CTS, toggle that line */
1502 if (tty->termios->c_cflag & CRTSCTS) {
1503 edge_port->shadowMCR |= MCR_RTS;
1504 send_cmd_write_uart_register(edge_port, MCR,
1505 edge_port->shadowMCR);
1506 }
1507 }
1508
1509
1510 /*****************************************************************************
1511 * SerialSetTermios
1512 * this function is called by the tty driver when it wants to change
1513 * the termios structure
1514 *****************************************************************************/
1515 static void edge_set_termios(struct tty_struct *tty,
1516 struct usb_serial_port *port, struct ktermios *old_termios)
1517 {
1518 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1519 unsigned int cflag;
1520
1521 cflag = tty->termios->c_cflag;
1522 dbg("%s - clfag %08x iflag %08x", __func__,
1523 tty->termios->c_cflag, tty->termios->c_iflag);
1524 dbg("%s - old clfag %08x old iflag %08x", __func__,
1525 old_termios->c_cflag, old_termios->c_iflag);
1526
1527 dbg("%s - port %d", __func__, port->number);
1528
1529 if (edge_port == NULL)
1530 return;
1531
1532 if (!edge_port->open) {
1533 dbg("%s - port not opened", __func__);
1534 return;
1535 }
1536
1537 /* change the port settings to the new ones specified */
1538 change_port_settings(tty, edge_port, old_termios);
1539 }
1540
1541
1542 /*****************************************************************************
1543 * get_lsr_info - get line status register info
1544 *
1545 * Purpose: Let user call ioctl() to get info when the UART physically
1546 * is emptied. On bus types like RS485, the transmitter must
1547 * release the bus after transmitting. This must be done when
1548 * the transmit shift register is empty, not be done when the
1549 * transmit holding register is empty. This functionality
1550 * allows an RS485 driver to be written in user space.
1551 *****************************************************************************/
1552 static int get_lsr_info(struct edgeport_port *edge_port,
1553 unsigned int __user *value)
1554 {
1555 unsigned int result = 0;
1556 unsigned long flags;
1557
1558 spin_lock_irqsave(&edge_port->ep_lock, flags);
1559 if (edge_port->maxTxCredits == edge_port->txCredits &&
1560 edge_port->txfifo.count == 0) {
1561 dbg("%s -- Empty", __func__);
1562 result = TIOCSER_TEMT;
1563 }
1564 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1565
1566 if (copy_to_user(value, &result, sizeof(int)))
1567 return -EFAULT;
1568 return 0;
1569 }
1570
1571 static int edge_tiocmset(struct tty_struct *tty,
1572 unsigned int set, unsigned int clear)
1573 {
1574 struct usb_serial_port *port = tty->driver_data;
1575 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1576 unsigned int mcr;
1577
1578 dbg("%s - port %d", __func__, port->number);
1579
1580 mcr = edge_port->shadowMCR;
1581 if (set & TIOCM_RTS)
1582 mcr |= MCR_RTS;
1583 if (set & TIOCM_DTR)
1584 mcr |= MCR_DTR;
1585 if (set & TIOCM_LOOP)
1586 mcr |= MCR_LOOPBACK;
1587
1588 if (clear & TIOCM_RTS)
1589 mcr &= ~MCR_RTS;
1590 if (clear & TIOCM_DTR)
1591 mcr &= ~MCR_DTR;
1592 if (clear & TIOCM_LOOP)
1593 mcr &= ~MCR_LOOPBACK;
1594
1595 edge_port->shadowMCR = mcr;
1596
1597 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1598
1599 return 0;
1600 }
1601
1602 static int edge_tiocmget(struct tty_struct *tty)
1603 {
1604 struct usb_serial_port *port = tty->driver_data;
1605 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1606 unsigned int result = 0;
1607 unsigned int msr;
1608 unsigned int mcr;
1609
1610 dbg("%s - port %d", __func__, port->number);
1611
1612 msr = edge_port->shadowMSR;
1613 mcr = edge_port->shadowMCR;
1614 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1615 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1616 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1617 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1618 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1619 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1620
1621
1622 dbg("%s -- %x", __func__, result);
1623
1624 return result;
1625 }
1626
1627 static int edge_get_icount(struct tty_struct *tty,
1628 struct serial_icounter_struct *icount)
1629 {
1630 struct usb_serial_port *port = tty->driver_data;
1631 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1632 struct async_icount cnow;
1633 cnow = edge_port->icount;
1634
1635 icount->cts = cnow.cts;
1636 icount->dsr = cnow.dsr;
1637 icount->rng = cnow.rng;
1638 icount->dcd = cnow.dcd;
1639 icount->rx = cnow.rx;
1640 icount->tx = cnow.tx;
1641 icount->frame = cnow.frame;
1642 icount->overrun = cnow.overrun;
1643 icount->parity = cnow.parity;
1644 icount->brk = cnow.brk;
1645 icount->buf_overrun = cnow.buf_overrun;
1646
1647 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1648 __func__, port->number, icount->rx, icount->tx);
1649 return 0;
1650 }
1651
1652 static int get_serial_info(struct edgeport_port *edge_port,
1653 struct serial_struct __user *retinfo)
1654 {
1655 struct serial_struct tmp;
1656
1657 if (!retinfo)
1658 return -EFAULT;
1659
1660 memset(&tmp, 0, sizeof(tmp));
1661
1662 tmp.type = PORT_16550A;
1663 tmp.line = edge_port->port->serial->minor;
1664 tmp.port = edge_port->port->number;
1665 tmp.irq = 0;
1666 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1667 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1668 tmp.baud_base = 9600;
1669 tmp.close_delay = 5*HZ;
1670 tmp.closing_wait = 30*HZ;
1671
1672 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1673 return -EFAULT;
1674 return 0;
1675 }
1676
1677
1678 /*****************************************************************************
1679 * SerialIoctl
1680 * this function handles any ioctl calls to the driver
1681 *****************************************************************************/
1682 static int edge_ioctl(struct tty_struct *tty,
1683 unsigned int cmd, unsigned long arg)
1684 {
1685 struct usb_serial_port *port = tty->driver_data;
1686 DEFINE_WAIT(wait);
1687 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1688 struct async_icount cnow;
1689 struct async_icount cprev;
1690
1691 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1692
1693 switch (cmd) {
1694 case TIOCSERGETLSR:
1695 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
1696 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1697
1698 case TIOCGSERIAL:
1699 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
1700 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1701
1702 case TIOCMIWAIT:
1703 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
1704 cprev = edge_port->icount;
1705 while (1) {
1706 prepare_to_wait(&edge_port->delta_msr_wait,
1707 &wait, TASK_INTERRUPTIBLE);
1708 schedule();
1709 finish_wait(&edge_port->delta_msr_wait, &wait);
1710 /* see if a signal did it */
1711 if (signal_pending(current))
1712 return -ERESTARTSYS;
1713 cnow = edge_port->icount;
1714 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1715 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1716 return -EIO; /* no change => error */
1717 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1718 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1719 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1720 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1721 return 0;
1722 }
1723 cprev = cnow;
1724 }
1725 /* NOTREACHED */
1726 break;
1727
1728 }
1729 return -ENOIOCTLCMD;
1730 }
1731
1732
1733 /*****************************************************************************
1734 * SerialBreak
1735 * this function sends a break to the port
1736 *****************************************************************************/
1737 static void edge_break(struct tty_struct *tty, int break_state)
1738 {
1739 struct usb_serial_port *port = tty->driver_data;
1740 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1741 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1742 int status;
1743
1744 if ((!edge_serial->is_epic) ||
1745 ((edge_serial->is_epic) &&
1746 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1747 /* flush and chase */
1748 edge_port->chaseResponsePending = true;
1749
1750 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1751 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1752 if (status == 0) {
1753 /* block until chase finished */
1754 block_until_chase_response(edge_port);
1755 } else {
1756 edge_port->chaseResponsePending = false;
1757 }
1758 }
1759
1760 if ((!edge_serial->is_epic) ||
1761 ((edge_serial->is_epic) &&
1762 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1763 if (break_state == -1) {
1764 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1765 status = send_iosp_ext_cmd(edge_port,
1766 IOSP_CMD_SET_BREAK, 0);
1767 } else {
1768 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1769 status = send_iosp_ext_cmd(edge_port,
1770 IOSP_CMD_CLEAR_BREAK, 0);
1771 }
1772 if (status)
1773 dbg("%s - error sending break set/clear command.",
1774 __func__);
1775 }
1776 }
1777
1778
1779 /*****************************************************************************
1780 * process_rcvd_data
1781 * this function handles the data received on the bulk in pipe.
1782 *****************************************************************************/
1783 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1784 unsigned char *buffer, __u16 bufferLength)
1785 {
1786 struct usb_serial_port *port;
1787 struct edgeport_port *edge_port;
1788 struct tty_struct *tty;
1789 __u16 lastBufferLength;
1790 __u16 rxLen;
1791
1792 dbg("%s", __func__);
1793
1794 lastBufferLength = bufferLength + 1;
1795
1796 while (bufferLength > 0) {
1797 /* failsafe incase we get a message that we don't understand */
1798 if (lastBufferLength == bufferLength) {
1799 dbg("%s - stuck in loop, exiting it.", __func__);
1800 break;
1801 }
1802 lastBufferLength = bufferLength;
1803
1804 switch (edge_serial->rxState) {
1805 case EXPECT_HDR1:
1806 edge_serial->rxHeader1 = *buffer;
1807 ++buffer;
1808 --bufferLength;
1809
1810 if (bufferLength == 0) {
1811 edge_serial->rxState = EXPECT_HDR2;
1812 break;
1813 }
1814 /* otherwise, drop on through */
1815 case EXPECT_HDR2:
1816 edge_serial->rxHeader2 = *buffer;
1817 ++buffer;
1818 --bufferLength;
1819
1820 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1821 edge_serial->rxHeader1, edge_serial->rxHeader2);
1822 /* Process depending on whether this header is
1823 * data or status */
1824
1825 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1826 /* Decode this status header and go to
1827 * EXPECT_HDR1 (if we can process the status
1828 * with only 2 bytes), or go to EXPECT_HDR3 to
1829 * get the third byte. */
1830 edge_serial->rxPort =
1831 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1832 edge_serial->rxStatusCode =
1833 IOSP_GET_STATUS_CODE(
1834 edge_serial->rxHeader1);
1835
1836 if (!IOSP_STATUS_IS_2BYTE(
1837 edge_serial->rxStatusCode)) {
1838 /* This status needs additional bytes.
1839 * Save what we have and then wait for
1840 * more data.
1841 */
1842 edge_serial->rxStatusParam
1843 = edge_serial->rxHeader2;
1844 edge_serial->rxState = EXPECT_HDR3;
1845 break;
1846 }
1847 /* We have all the header bytes, process the
1848 status now */
1849 process_rcvd_status(edge_serial,
1850 edge_serial->rxHeader2, 0);
1851 edge_serial->rxState = EXPECT_HDR1;
1852 break;
1853 } else {
1854 edge_serial->rxPort =
1855 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1856 edge_serial->rxBytesRemaining =
1857 IOSP_GET_HDR_DATA_LEN(
1858 edge_serial->rxHeader1,
1859 edge_serial->rxHeader2);
1860 dbg("%s - Data for Port %u Len %u",
1861 __func__,
1862 edge_serial->rxPort,
1863 edge_serial->rxBytesRemaining);
1864
1865 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1866 * ASSERT(DevExt->RxBytesRemaining <
1867 * IOSP_MAX_DATA_LENGTH);
1868 */
1869
1870 if (bufferLength == 0) {
1871 edge_serial->rxState = EXPECT_DATA;
1872 break;
1873 }
1874 /* Else, drop through */
1875 }
1876 case EXPECT_DATA: /* Expect data */
1877 if (bufferLength < edge_serial->rxBytesRemaining) {
1878 rxLen = bufferLength;
1879 /* Expect data to start next buffer */
1880 edge_serial->rxState = EXPECT_DATA;
1881 } else {
1882 /* BufLen >= RxBytesRemaining */
1883 rxLen = edge_serial->rxBytesRemaining;
1884 /* Start another header next time */
1885 edge_serial->rxState = EXPECT_HDR1;
1886 }
1887
1888 bufferLength -= rxLen;
1889 edge_serial->rxBytesRemaining -= rxLen;
1890
1891 /* spit this data back into the tty driver if this
1892 port is open */
1893 if (rxLen) {
1894 port = edge_serial->serial->port[
1895 edge_serial->rxPort];
1896 edge_port = usb_get_serial_port_data(port);
1897 if (edge_port->open) {
1898 tty = tty_port_tty_get(
1899 &edge_port->port->port);
1900 if (tty) {
1901 dbg("%s - Sending %d bytes to TTY for port %d",
1902 __func__, rxLen, edge_serial->rxPort);
1903 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1904 tty_kref_put(tty);
1905 }
1906 edge_port->icount.rx += rxLen;
1907 }
1908 buffer += rxLen;
1909 }
1910 break;
1911
1912 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1913 edge_serial->rxHeader3 = *buffer;
1914 ++buffer;
1915 --bufferLength;
1916
1917 /* We have all the header bytes, process the
1918 status now */
1919 process_rcvd_status(edge_serial,
1920 edge_serial->rxStatusParam,
1921 edge_serial->rxHeader3);
1922 edge_serial->rxState = EXPECT_HDR1;
1923 break;
1924 }
1925 }
1926 }
1927
1928
1929 /*****************************************************************************
1930 * process_rcvd_status
1931 * this function handles the any status messages received on the
1932 * bulk in pipe.
1933 *****************************************************************************/
1934 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1935 __u8 byte2, __u8 byte3)
1936 {
1937 struct usb_serial_port *port;
1938 struct edgeport_port *edge_port;
1939 struct tty_struct *tty;
1940 __u8 code = edge_serial->rxStatusCode;
1941
1942 /* switch the port pointer to the one being currently talked about */
1943 port = edge_serial->serial->port[edge_serial->rxPort];
1944 edge_port = usb_get_serial_port_data(port);
1945 if (edge_port == NULL) {
1946 dev_err(&edge_serial->serial->dev->dev,
1947 "%s - edge_port == NULL for port %d\n",
1948 __func__, edge_serial->rxPort);
1949 return;
1950 }
1951
1952 dbg("%s - port %d", __func__, edge_serial->rxPort);
1953
1954 if (code == IOSP_EXT_STATUS) {
1955 switch (byte2) {
1956 case IOSP_EXT_STATUS_CHASE_RSP:
1957 /* we want to do EXT status regardless of port
1958 * open/closed */
1959 dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1960 __func__, edge_serial->rxPort, byte3);
1961 /* Currently, the only EXT_STATUS is Chase, so process
1962 * here instead of one more call to one more subroutine
1963 * If/when more EXT_STATUS, there'll be more work to do
1964 * Also, we currently clear flag and close the port
1965 * regardless of content of above's Byte3.
1966 * We could choose to do something else when Byte3 says
1967 * Timeout on Chase from Edgeport, like wait longer in
1968 * block_until_chase_response, but for now we don't.
1969 */
1970 edge_port->chaseResponsePending = false;
1971 wake_up(&edge_port->wait_chase);
1972 return;
1973
1974 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1975 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3);
1976 /* Port->RxCheckRsp = true; */
1977 return;
1978 }
1979 }
1980
1981 if (code == IOSP_STATUS_OPEN_RSP) {
1982 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1983 edge_port->maxTxCredits = edge_port->txCredits;
1984 dbg("%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1985 handle_new_msr(edge_port, byte2);
1986
1987 /* send the current line settings to the port so we are
1988 in sync with any further termios calls */
1989 tty = tty_port_tty_get(&edge_port->port->port);
1990 if (tty) {
1991 change_port_settings(tty,
1992 edge_port, tty->termios);
1993 tty_kref_put(tty);
1994 }
1995
1996 /* we have completed the open */
1997 edge_port->openPending = false;
1998 edge_port->open = true;
1999 wake_up(&edge_port->wait_open);
2000 return;
2001 }
2002
2003 /* If port is closed, silently discard all rcvd status. We can
2004 * have cases where buffered status is received AFTER the close
2005 * port command is sent to the Edgeport.
2006 */
2007 if (!edge_port->open || edge_port->closePending)
2008 return;
2009
2010 switch (code) {
2011 /* Not currently sent by Edgeport */
2012 case IOSP_STATUS_LSR:
2013 dbg("%s - Port %u LSR Status = %02x",
2014 __func__, edge_serial->rxPort, byte2);
2015 handle_new_lsr(edge_port, false, byte2, 0);
2016 break;
2017
2018 case IOSP_STATUS_LSR_DATA:
2019 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2020 __func__, edge_serial->rxPort, byte2, byte3);
2021 /* byte2 is LSR Register */
2022 /* byte3 is broken data byte */
2023 handle_new_lsr(edge_port, true, byte2, byte3);
2024 break;
2025 /*
2026 * case IOSP_EXT_4_STATUS:
2027 * dbg("%s - Port %u LSR Status = %02x Data = %02x",
2028 * __func__, edge_serial->rxPort, byte2, byte3);
2029 * break;
2030 */
2031 case IOSP_STATUS_MSR:
2032 dbg("%s - Port %u MSR Status = %02x",
2033 __func__, edge_serial->rxPort, byte2);
2034 /*
2035 * Process this new modem status and generate appropriate
2036 * events, etc, based on the new status. This routine
2037 * also saves the MSR in Port->ShadowMsr.
2038 */
2039 handle_new_msr(edge_port, byte2);
2040 break;
2041
2042 default:
2043 dbg("%s - Unrecognized IOSP status code %u", __func__, code);
2044 break;
2045 }
2046 }
2047
2048
2049 /*****************************************************************************
2050 * edge_tty_recv
2051 * this function passes data on to the tty flip buffer
2052 *****************************************************************************/
2053 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2054 unsigned char *data, int length)
2055 {
2056 int cnt;
2057
2058 cnt = tty_insert_flip_string(tty, data, length);
2059 if (cnt < length) {
2060 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2061 __func__, length - cnt);
2062 }
2063 data += cnt;
2064 length -= cnt;
2065
2066 tty_flip_buffer_push(tty);
2067 }
2068
2069
2070 /*****************************************************************************
2071 * handle_new_msr
2072 * this function handles any change to the msr register for a port.
2073 *****************************************************************************/
2074 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2075 {
2076 struct async_icount *icount;
2077
2078 dbg("%s %02x", __func__, newMsr);
2079
2080 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2081 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2082 icount = &edge_port->icount;
2083
2084 /* update input line counters */
2085 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2086 icount->cts++;
2087 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2088 icount->dsr++;
2089 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2090 icount->dcd++;
2091 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2092 icount->rng++;
2093 wake_up_interruptible(&edge_port->delta_msr_wait);
2094 }
2095
2096 /* Save the new modem status */
2097 edge_port->shadowMSR = newMsr & 0xf0;
2098 }
2099
2100
2101 /*****************************************************************************
2102 * handle_new_lsr
2103 * this function handles any change to the lsr register for a port.
2104 *****************************************************************************/
2105 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2106 __u8 lsr, __u8 data)
2107 {
2108 __u8 newLsr = (__u8) (lsr & (__u8)
2109 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2110 struct async_icount *icount;
2111
2112 dbg("%s - %02x", __func__, newLsr);
2113
2114 edge_port->shadowLSR = lsr;
2115
2116 if (newLsr & LSR_BREAK) {
2117 /*
2118 * Parity and Framing errors only count if they
2119 * occur exclusive of a break being
2120 * received.
2121 */
2122 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2123 }
2124
2125 /* Place LSR data byte into Rx buffer */
2126 if (lsrData) {
2127 struct tty_struct *tty =
2128 tty_port_tty_get(&edge_port->port->port);
2129 if (tty) {
2130 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2131 tty_kref_put(tty);
2132 }
2133 }
2134 /* update input line counters */
2135 icount = &edge_port->icount;
2136 if (newLsr & LSR_BREAK)
2137 icount->brk++;
2138 if (newLsr & LSR_OVER_ERR)
2139 icount->overrun++;
2140 if (newLsr & LSR_PAR_ERR)
2141 icount->parity++;
2142 if (newLsr & LSR_FRM_ERR)
2143 icount->frame++;
2144 }
2145
2146
2147 /****************************************************************************
2148 * sram_write
2149 * writes a number of bytes to the Edgeport device's sram starting at the
2150 * given address.
2151 * If successful returns the number of bytes written, otherwise it returns
2152 * a negative error number of the problem.
2153 ****************************************************************************/
2154 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2155 __u16 length, const __u8 *data)
2156 {
2157 int result;
2158 __u16 current_length;
2159 unsigned char *transfer_buffer;
2160
2161 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2162
2163 transfer_buffer = kmalloc(64, GFP_KERNEL);
2164 if (!transfer_buffer) {
2165 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2166 __func__, 64);
2167 return -ENOMEM;
2168 }
2169
2170 /* need to split these writes up into 64 byte chunks */
2171 result = 0;
2172 while (length > 0) {
2173 if (length > 64)
2174 current_length = 64;
2175 else
2176 current_length = length;
2177
2178 /* dbg("%s - writing %x, %x, %d", __func__,
2179 extAddr, addr, current_length); */
2180 memcpy(transfer_buffer, data, current_length);
2181 result = usb_control_msg(serial->dev,
2182 usb_sndctrlpipe(serial->dev, 0),
2183 USB_REQUEST_ION_WRITE_RAM,
2184 0x40, addr, extAddr, transfer_buffer,
2185 current_length, 300);
2186 if (result < 0)
2187 break;
2188 length -= current_length;
2189 addr += current_length;
2190 data += current_length;
2191 }
2192
2193 kfree(transfer_buffer);
2194 return result;
2195 }
2196
2197
2198 /****************************************************************************
2199 * rom_write
2200 * writes a number of bytes to the Edgeport device's ROM starting at the
2201 * given address.
2202 * If successful returns the number of bytes written, otherwise it returns
2203 * a negative error number of the problem.
2204 ****************************************************************************/
2205 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2206 __u16 length, const __u8 *data)
2207 {
2208 int result;
2209 __u16 current_length;
2210 unsigned char *transfer_buffer;
2211
2212 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2213
2214 transfer_buffer = kmalloc(64, GFP_KERNEL);
2215 if (!transfer_buffer) {
2216 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2217 __func__, 64);
2218 return -ENOMEM;
2219 }
2220
2221 /* need to split these writes up into 64 byte chunks */
2222 result = 0;
2223 while (length > 0) {
2224 if (length > 64)
2225 current_length = 64;
2226 else
2227 current_length = length;
2228 /* dbg("%s - writing %x, %x, %d", __func__,
2229 extAddr, addr, current_length); */
2230 memcpy(transfer_buffer, data, current_length);
2231 result = usb_control_msg(serial->dev,
2232 usb_sndctrlpipe(serial->dev, 0),
2233 USB_REQUEST_ION_WRITE_ROM, 0x40,
2234 addr, extAddr,
2235 transfer_buffer, current_length, 300);
2236 if (result < 0)
2237 break;
2238 length -= current_length;
2239 addr += current_length;
2240 data += current_length;
2241 }
2242
2243 kfree(transfer_buffer);
2244 return result;
2245 }
2246
2247
2248 /****************************************************************************
2249 * rom_read
2250 * reads a number of bytes from the Edgeport device starting at the given
2251 * address.
2252 * If successful returns the number of bytes read, otherwise it returns
2253 * a negative error number of the problem.
2254 ****************************************************************************/
2255 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2256 __u16 addr, __u16 length, __u8 *data)
2257 {
2258 int result;
2259 __u16 current_length;
2260 unsigned char *transfer_buffer;
2261
2262 dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2263
2264 transfer_buffer = kmalloc(64, GFP_KERNEL);
2265 if (!transfer_buffer) {
2266 dev_err(&serial->dev->dev,
2267 "%s - kmalloc(%d) failed.\n", __func__, 64);
2268 return -ENOMEM;
2269 }
2270
2271 /* need to split these reads up into 64 byte chunks */
2272 result = 0;
2273 while (length > 0) {
2274 if (length > 64)
2275 current_length = 64;
2276 else
2277 current_length = length;
2278 /* dbg("%s - %x, %x, %d", __func__,
2279 extAddr, addr, current_length); */
2280 result = usb_control_msg(serial->dev,
2281 usb_rcvctrlpipe(serial->dev, 0),
2282 USB_REQUEST_ION_READ_ROM,
2283 0xC0, addr, extAddr, transfer_buffer,
2284 current_length, 300);
2285 if (result < 0)
2286 break;
2287 memcpy(data, transfer_buffer, current_length);
2288 length -= current_length;
2289 addr += current_length;
2290 data += current_length;
2291 }
2292
2293 kfree(transfer_buffer);
2294 return result;
2295 }
2296
2297
2298 /****************************************************************************
2299 * send_iosp_ext_cmd
2300 * Is used to send a IOSP message to the Edgeport device
2301 ****************************************************************************/
2302 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2303 __u8 command, __u8 param)
2304 {
2305 unsigned char *buffer;
2306 unsigned char *currentCommand;
2307 int length = 0;
2308 int status = 0;
2309
2310 dbg("%s - %d, %d", __func__, command, param);
2311
2312 buffer = kmalloc(10, GFP_ATOMIC);
2313 if (!buffer) {
2314 dev_err(&edge_port->port->dev,
2315 "%s - kmalloc(%d) failed.\n", __func__, 10);
2316 return -ENOMEM;
2317 }
2318
2319 currentCommand = buffer;
2320
2321 MAKE_CMD_EXT_CMD(&currentCommand, &length,
2322 edge_port->port->number - edge_port->port->serial->minor,
2323 command, param);
2324
2325 status = write_cmd_usb(edge_port, buffer, length);
2326 if (status) {
2327 /* something bad happened, let's free up the memory */
2328 kfree(buffer);
2329 }
2330
2331 return status;
2332 }
2333
2334
2335 /*****************************************************************************
2336 * write_cmd_usb
2337 * this function writes the given buffer out to the bulk write endpoint.
2338 *****************************************************************************/
2339 static int write_cmd_usb(struct edgeport_port *edge_port,
2340 unsigned char *buffer, int length)
2341 {
2342 struct edgeport_serial *edge_serial =
2343 usb_get_serial_data(edge_port->port->serial);
2344 int status = 0;
2345 struct urb *urb;
2346
2347 usb_serial_debug_data(debug, &edge_port->port->dev,
2348 __func__, length, buffer);
2349
2350 /* Allocate our next urb */
2351 urb = usb_alloc_urb(0, GFP_ATOMIC);
2352 if (!urb)
2353 return -ENOMEM;
2354
2355 atomic_inc(&CmdUrbs);
2356 dbg("%s - ALLOCATE URB %p (outstanding %d)",
2357 __func__, urb, atomic_read(&CmdUrbs));
2358
2359 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2360 usb_sndbulkpipe(edge_serial->serial->dev,
2361 edge_serial->bulk_out_endpoint),
2362 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2363
2364 edge_port->commandPending = true;
2365 status = usb_submit_urb(urb, GFP_ATOMIC);
2366
2367 if (status) {
2368 /* something went wrong */
2369 dev_err(&edge_port->port->dev,
2370 "%s - usb_submit_urb(write command) failed, status = %d\n",
2371 __func__, status);
2372 usb_kill_urb(urb);
2373 usb_free_urb(urb);
2374 atomic_dec(&CmdUrbs);
2375 return status;
2376 }
2377
2378 #if 0
2379 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2380
2381 if (edge_port->commandPending) {
2382 /* command timed out */
2383 dbg("%s - command timed out", __func__);
2384 status = -EINVAL;
2385 }
2386 #endif
2387 return status;
2388 }
2389
2390
2391 /*****************************************************************************
2392 * send_cmd_write_baud_rate
2393 * this function sends the proper command to change the baud rate of the
2394 * specified port.
2395 *****************************************************************************/
2396 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2397 int baudRate)
2398 {
2399 struct edgeport_serial *edge_serial =
2400 usb_get_serial_data(edge_port->port->serial);
2401 unsigned char *cmdBuffer;
2402 unsigned char *currCmd;
2403 int cmdLen = 0;
2404 int divisor;
2405 int status;
2406 unsigned char number =
2407 edge_port->port->number - edge_port->port->serial->minor;
2408
2409 if (edge_serial->is_epic &&
2410 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2411 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2412 edge_port->port->number, baudRate);
2413 return 0;
2414 }
2415
2416 dbg("%s - port = %d, baud = %d", __func__,
2417 edge_port->port->number, baudRate);
2418
2419 status = calc_baud_rate_divisor(baudRate, &divisor);
2420 if (status) {
2421 dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2422 __func__);
2423 return status;
2424 }
2425
2426 /* Alloc memory for the string of commands. */
2427 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2428 if (!cmdBuffer) {
2429 dev_err(&edge_port->port->dev,
2430 "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2431 return -ENOMEM;
2432 }
2433 currCmd = cmdBuffer;
2434
2435 /* Enable access to divisor latch */
2436 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2437
2438 /* Write the divisor itself */
2439 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2440 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2441
2442 /* Restore original value to disable access to divisor latch */
2443 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2444 edge_port->shadowLCR);
2445
2446 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2447 if (status) {
2448 /* something bad happened, let's free up the memory */
2449 kfree(cmdBuffer);
2450 }
2451
2452 return status;
2453 }
2454
2455
2456 /*****************************************************************************
2457 * calc_baud_rate_divisor
2458 * this function calculates the proper baud rate divisor for the specified
2459 * baud rate.
2460 *****************************************************************************/
2461 static int calc_baud_rate_divisor(int baudrate, int *divisor)
2462 {
2463 int i;
2464 __u16 custom;
2465
2466
2467 dbg("%s - %d", __func__, baudrate);
2468
2469 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2470 if (divisor_table[i].BaudRate == baudrate) {
2471 *divisor = divisor_table[i].Divisor;
2472 return 0;
2473 }
2474 }
2475
2476 /* We have tried all of the standard baud rates
2477 * lets try to calculate the divisor for this baud rate
2478 * Make sure the baud rate is reasonable */
2479 if (baudrate > 50 && baudrate < 230400) {
2480 /* get divisor */
2481 custom = (__u16)((230400L + baudrate/2) / baudrate);
2482
2483 *divisor = custom;
2484
2485 dbg("%s - Baud %d = %d", __func__, baudrate, custom);
2486 return 0;
2487 }
2488
2489 return -1;
2490 }
2491
2492
2493 /*****************************************************************************
2494 * send_cmd_write_uart_register
2495 * this function builds up a uart register message and sends to the device.
2496 *****************************************************************************/
2497 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2498 __u8 regNum, __u8 regValue)
2499 {
2500 struct edgeport_serial *edge_serial =
2501 usb_get_serial_data(edge_port->port->serial);
2502 unsigned char *cmdBuffer;
2503 unsigned char *currCmd;
2504 unsigned long cmdLen = 0;
2505 int status;
2506
2507 dbg("%s - write to %s register 0x%02x",
2508 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2509
2510 if (edge_serial->is_epic &&
2511 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2512 regNum == MCR) {
2513 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2514 return 0;
2515 }
2516
2517 if (edge_serial->is_epic &&
2518 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2519 regNum == LCR) {
2520 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2521 return 0;
2522 }
2523
2524 /* Alloc memory for the string of commands. */
2525 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2526 if (cmdBuffer == NULL)
2527 return -ENOMEM;
2528
2529 currCmd = cmdBuffer;
2530
2531 /* Build a cmd in the buffer to write the given register */
2532 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2533 edge_port->port->number - edge_port->port->serial->minor,
2534 regNum, regValue);
2535
2536 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2537 if (status) {
2538 /* something bad happened, let's free up the memory */
2539 kfree(cmdBuffer);
2540 }
2541
2542 return status;
2543 }
2544
2545
2546 /*****************************************************************************
2547 * change_port_settings
2548 * This routine is called to set the UART on the device to match the
2549 * specified new settings.
2550 *****************************************************************************/
2551
2552 static void change_port_settings(struct tty_struct *tty,
2553 struct edgeport_port *edge_port, struct ktermios *old_termios)
2554 {
2555 struct edgeport_serial *edge_serial =
2556 usb_get_serial_data(edge_port->port->serial);
2557 int baud;
2558 unsigned cflag;
2559 __u8 mask = 0xff;
2560 __u8 lData;
2561 __u8 lParity;
2562 __u8 lStop;
2563 __u8 rxFlow;
2564 __u8 txFlow;
2565 int status;
2566
2567 dbg("%s - port %d", __func__, edge_port->port->number);
2568
2569 if (!edge_port->open &&
2570 !edge_port->openPending) {
2571 dbg("%s - port not opened", __func__);
2572 return;
2573 }
2574
2575 cflag = tty->termios->c_cflag;
2576
2577 switch (cflag & CSIZE) {
2578 case CS5:
2579 lData = LCR_BITS_5; mask = 0x1f;
2580 dbg("%s - data bits = 5", __func__);
2581 break;
2582 case CS6:
2583 lData = LCR_BITS_6; mask = 0x3f;
2584 dbg("%s - data bits = 6", __func__);
2585 break;
2586 case CS7:
2587 lData = LCR_BITS_7; mask = 0x7f;
2588 dbg("%s - data bits = 7", __func__);
2589 break;
2590 default:
2591 case CS8:
2592 lData = LCR_BITS_8;
2593 dbg("%s - data bits = 8", __func__);
2594 break;
2595 }
2596
2597 lParity = LCR_PAR_NONE;
2598 if (cflag & PARENB) {
2599 if (cflag & CMSPAR) {
2600 if (cflag & PARODD) {
2601 lParity = LCR_PAR_MARK;
2602 dbg("%s - parity = mark", __func__);
2603 } else {
2604 lParity = LCR_PAR_SPACE;
2605 dbg("%s - parity = space", __func__);
2606 }
2607 } else if (cflag & PARODD) {
2608 lParity = LCR_PAR_ODD;
2609 dbg("%s - parity = odd", __func__);
2610 } else {
2611 lParity = LCR_PAR_EVEN;
2612 dbg("%s - parity = even", __func__);
2613 }
2614 } else {
2615 dbg("%s - parity = none", __func__);
2616 }
2617
2618 if (cflag & CSTOPB) {
2619 lStop = LCR_STOP_2;
2620 dbg("%s - stop bits = 2", __func__);
2621 } else {
2622 lStop = LCR_STOP_1;
2623 dbg("%s - stop bits = 1", __func__);
2624 }
2625
2626 /* figure out the flow control settings */
2627 rxFlow = txFlow = 0x00;
2628 if (cflag & CRTSCTS) {
2629 rxFlow |= IOSP_RX_FLOW_RTS;
2630 txFlow |= IOSP_TX_FLOW_CTS;
2631 dbg("%s - RTS/CTS is enabled", __func__);
2632 } else {
2633 dbg("%s - RTS/CTS is disabled", __func__);
2634 }
2635
2636 /* if we are implementing XON/XOFF, set the start and stop character
2637 in the device */
2638 if (I_IXOFF(tty) || I_IXON(tty)) {
2639 unsigned char stop_char = STOP_CHAR(tty);
2640 unsigned char start_char = START_CHAR(tty);
2641
2642 if ((!edge_serial->is_epic) ||
2643 ((edge_serial->is_epic) &&
2644 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2645 send_iosp_ext_cmd(edge_port,
2646 IOSP_CMD_SET_XON_CHAR, start_char);
2647 send_iosp_ext_cmd(edge_port,
2648 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2649 }
2650
2651 /* if we are implementing INBOUND XON/XOFF */
2652 if (I_IXOFF(tty)) {
2653 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2654 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2655 __func__, start_char, stop_char);
2656 } else {
2657 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2658 }
2659
2660 /* if we are implementing OUTBOUND XON/XOFF */
2661 if (I_IXON(tty)) {
2662 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2663 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2664 __func__, start_char, stop_char);
2665 } else {
2666 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2667 }
2668 }
2669
2670 /* Set flow control to the configured value */
2671 if ((!edge_serial->is_epic) ||
2672 ((edge_serial->is_epic) &&
2673 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2674 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2675 if ((!edge_serial->is_epic) ||
2676 ((edge_serial->is_epic) &&
2677 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2678 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2679
2680
2681 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2682 edge_port->shadowLCR |= (lData | lParity | lStop);
2683
2684 edge_port->validDataMask = mask;
2685
2686 /* Send the updated LCR value to the EdgePort */
2687 status = send_cmd_write_uart_register(edge_port, LCR,
2688 edge_port->shadowLCR);
2689 if (status != 0)
2690 return;
2691
2692 /* set up the MCR register and send it to the EdgePort */
2693 edge_port->shadowMCR = MCR_MASTER_IE;
2694 if (cflag & CBAUD)
2695 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2696
2697 status = send_cmd_write_uart_register(edge_port, MCR,
2698 edge_port->shadowMCR);
2699 if (status != 0)
2700 return;
2701
2702 /* Determine divisor based on baud rate */
2703 baud = tty_get_baud_rate(tty);
2704 if (!baud) {
2705 /* pick a default, any default... */
2706 baud = 9600;
2707 }
2708
2709 dbg("%s - baud rate = %d", __func__, baud);
2710 status = send_cmd_write_baud_rate(edge_port, baud);
2711 if (status == -1) {
2712 /* Speed change was not possible - put back the old speed */
2713 baud = tty_termios_baud_rate(old_termios);
2714 tty_encode_baud_rate(tty, baud, baud);
2715 }
2716 }
2717
2718
2719 /****************************************************************************
2720 * unicode_to_ascii
2721 * Turns a string from Unicode into ASCII.
2722 * Doesn't do a good job with any characters that are outside the normal
2723 * ASCII range, but it's only for debugging...
2724 * NOTE: expects the unicode in LE format
2725 ****************************************************************************/
2726 static void unicode_to_ascii(char *string, int buflen,
2727 __le16 *unicode, int unicode_size)
2728 {
2729 int i;
2730
2731 if (buflen <= 0) /* never happens, but... */
2732 return;
2733 --buflen; /* space for nul */
2734
2735 for (i = 0; i < unicode_size; i++) {
2736 if (i >= buflen)
2737 break;
2738 string[i] = (char)(le16_to_cpu(unicode[i]));
2739 }
2740 string[i] = 0x00;
2741 }
2742
2743
2744 /****************************************************************************
2745 * get_manufacturing_desc
2746 * reads in the manufacturing descriptor and stores it into the serial
2747 * structure.
2748 ****************************************************************************/
2749 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2750 {
2751 int response;
2752
2753 dbg("getting manufacturer descriptor");
2754
2755 response = rom_read(edge_serial->serial,
2756 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2757 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2758 EDGE_MANUF_DESC_LEN,
2759 (__u8 *)(&edge_serial->manuf_descriptor));
2760
2761 if (response < 1)
2762 dev_err(&edge_serial->serial->dev->dev,
2763 "error in getting manufacturer descriptor\n");
2764 else {
2765 char string[30];
2766 dbg("**Manufacturer Descriptor");
2767 dbg(" RomSize: %dK",
2768 edge_serial->manuf_descriptor.RomSize);
2769 dbg(" RamSize: %dK",
2770 edge_serial->manuf_descriptor.RamSize);
2771 dbg(" CpuRev: %d",
2772 edge_serial->manuf_descriptor.CpuRev);
2773 dbg(" BoardRev: %d",
2774 edge_serial->manuf_descriptor.BoardRev);
2775 dbg(" NumPorts: %d",
2776 edge_serial->manuf_descriptor.NumPorts);
2777 dbg(" DescDate: %d/%d/%d",
2778 edge_serial->manuf_descriptor.DescDate[0],
2779 edge_serial->manuf_descriptor.DescDate[1],
2780 edge_serial->manuf_descriptor.DescDate[2]+1900);
2781 unicode_to_ascii(string, sizeof(string),
2782 edge_serial->manuf_descriptor.SerialNumber,
2783 edge_serial->manuf_descriptor.SerNumLength/2);
2784 dbg(" SerialNumber: %s", string);
2785 unicode_to_ascii(string, sizeof(string),
2786 edge_serial->manuf_descriptor.AssemblyNumber,
2787 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2788 dbg(" AssemblyNumber: %s", string);
2789 unicode_to_ascii(string, sizeof(string),
2790 edge_serial->manuf_descriptor.OemAssyNumber,
2791 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2792 dbg(" OemAssyNumber: %s", string);
2793 dbg(" UartType: %d",
2794 edge_serial->manuf_descriptor.UartType);
2795 dbg(" IonPid: %d",
2796 edge_serial->manuf_descriptor.IonPid);
2797 dbg(" IonConfig: %d",
2798 edge_serial->manuf_descriptor.IonConfig);
2799 }
2800 }
2801
2802
2803 /****************************************************************************
2804 * get_boot_desc
2805 * reads in the bootloader descriptor and stores it into the serial
2806 * structure.
2807 ****************************************************************************/
2808 static void get_boot_desc(struct edgeport_serial *edge_serial)
2809 {
2810 int response;
2811
2812 dbg("getting boot descriptor");
2813
2814 response = rom_read(edge_serial->serial,
2815 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2816 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2817 EDGE_BOOT_DESC_LEN,
2818 (__u8 *)(&edge_serial->boot_descriptor));
2819
2820 if (response < 1)
2821 dev_err(&edge_serial->serial->dev->dev,
2822 "error in getting boot descriptor\n");
2823 else {
2824 dbg("**Boot Descriptor:");
2825 dbg(" BootCodeLength: %d",
2826 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2827 dbg(" MajorVersion: %d",
2828 edge_serial->boot_descriptor.MajorVersion);
2829 dbg(" MinorVersion: %d",
2830 edge_serial->boot_descriptor.MinorVersion);
2831 dbg(" BuildNumber: %d",
2832 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2833 dbg(" Capabilities: 0x%x",
2834 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2835 dbg(" UConfig0: %d",
2836 edge_serial->boot_descriptor.UConfig0);
2837 dbg(" UConfig1: %d",
2838 edge_serial->boot_descriptor.UConfig1);
2839 }
2840 }
2841
2842
2843 /****************************************************************************
2844 * load_application_firmware
2845 * This is called to load the application firmware to the device
2846 ****************************************************************************/
2847 static void load_application_firmware(struct edgeport_serial *edge_serial)
2848 {
2849 const struct ihex_binrec *rec;
2850 const struct firmware *fw;
2851 const char *fw_name;
2852 const char *fw_info;
2853 int response;
2854 __u32 Operaddr;
2855 __u16 build;
2856
2857 switch (edge_serial->product_info.iDownloadFile) {
2858 case EDGE_DOWNLOAD_FILE_I930:
2859 fw_info = "downloading firmware version (930)";
2860 fw_name = "edgeport/down.fw";
2861 break;
2862
2863 case EDGE_DOWNLOAD_FILE_80251:
2864 fw_info = "downloading firmware version (80251)";
2865 fw_name = "edgeport/down2.fw";
2866 break;
2867
2868 case EDGE_DOWNLOAD_FILE_NONE:
2869 dbg("No download file specified, skipping download");
2870 return;
2871
2872 default:
2873 return;
2874 }
2875
2876 response = request_ihex_firmware(&fw, fw_name,
2877 &edge_serial->serial->dev->dev);
2878 if (response) {
2879 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2880 fw_name, response);
2881 return;
2882 }
2883
2884 rec = (const struct ihex_binrec *)fw->data;
2885 build = (rec->data[2] << 8) | rec->data[3];
2886
2887 dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2888
2889 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2890 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2891 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2892
2893 for (rec = ihex_next_binrec(rec); rec;
2894 rec = ihex_next_binrec(rec)) {
2895 Operaddr = be32_to_cpu(rec->addr);
2896 response = sram_write(edge_serial->serial,
2897 Operaddr >> 16,
2898 Operaddr & 0xFFFF,
2899 be16_to_cpu(rec->len),
2900 &rec->data[0]);
2901 if (response < 0) {
2902 dev_err(&edge_serial->serial->dev->dev,
2903 "sram_write failed (%x, %x, %d)\n",
2904 Operaddr >> 16, Operaddr & 0xFFFF,
2905 be16_to_cpu(rec->len));
2906 break;
2907 }
2908 }
2909
2910 dbg("sending exec_dl_code");
2911 response = usb_control_msg (edge_serial->serial->dev,
2912 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2913 USB_REQUEST_ION_EXEC_DL_CODE,
2914 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2915
2916 release_firmware(fw);
2917 }
2918
2919
2920 /****************************************************************************
2921 * edge_startup
2922 ****************************************************************************/
2923 static int edge_startup(struct usb_serial *serial)
2924 {
2925 struct edgeport_serial *edge_serial;
2926 struct usb_device *dev;
2927 int i;
2928 int response;
2929 bool interrupt_in_found;
2930 bool bulk_in_found;
2931 bool bulk_out_found;
2932 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2933 EDGE_COMPATIBILITY_MASK1,
2934 EDGE_COMPATIBILITY_MASK2 };
2935
2936 dev = serial->dev;
2937
2938 /* create our private serial structure */
2939 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2940 if (edge_serial == NULL) {
2941 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2942 return -ENOMEM;
2943 }
2944 spin_lock_init(&edge_serial->es_lock);
2945 edge_serial->serial = serial;
2946 usb_set_serial_data(serial, edge_serial);
2947
2948 /* get the name for the device from the device */
2949 i = usb_string(dev, dev->descriptor.iManufacturer,
2950 &edge_serial->name[0], MAX_NAME_LEN+1);
2951 if (i < 0)
2952 i = 0;
2953 edge_serial->name[i++] = ' ';
2954 usb_string(dev, dev->descriptor.iProduct,
2955 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2956
2957 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2958
2959 /* Read the epic descriptor */
2960 if (get_epic_descriptor(edge_serial) <= 0) {
2961 /* memcpy descriptor to Supports structures */
2962 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2963 sizeof(struct edge_compatibility_bits));
2964
2965 /* get the manufacturing descriptor for this device */
2966 get_manufacturing_desc(edge_serial);
2967
2968 /* get the boot descriptor */
2969 get_boot_desc(edge_serial);
2970
2971 get_product_info(edge_serial);
2972 }
2973
2974 /* set the number of ports from the manufacturing description */
2975 /* serial->num_ports = serial->product_info.NumPorts; */
2976 if ((!edge_serial->is_epic) &&
2977 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2978 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2979 "vs. core thinking we have %d ports, email "
2980 "greg@kroah.com this information.\n",
2981 edge_serial->product_info.NumPorts,
2982 serial->num_ports);
2983 }
2984
2985 dbg("%s - time 1 %ld", __func__, jiffies);
2986
2987 /* If not an EPiC device */
2988 if (!edge_serial->is_epic) {
2989 /* now load the application firmware into this device */
2990 load_application_firmware(edge_serial);
2991
2992 dbg("%s - time 2 %ld", __func__, jiffies);
2993
2994 /* Check current Edgeport EEPROM and update if necessary */
2995 update_edgeport_E2PROM(edge_serial);
2996
2997 dbg("%s - time 3 %ld", __func__, jiffies);
2998
2999 /* set the configuration to use #1 */
3000 /* dbg("set_configuration 1"); */
3001 /* usb_set_configuration (dev, 1); */
3002 }
3003 dbg(" FirmwareMajorVersion %d.%d.%d",
3004 edge_serial->product_info.FirmwareMajorVersion,
3005 edge_serial->product_info.FirmwareMinorVersion,
3006 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3007
3008 /* we set up the pointers to the endpoints in the edge_open function,
3009 * as the structures aren't created yet. */
3010
3011 response = 0;
3012
3013 if (edge_serial->is_epic) {
3014 /* EPIC thing, set up our interrupt polling now and our read
3015 * urb, so that the device knows it really is connected. */
3016 interrupt_in_found = bulk_in_found = bulk_out_found = false;
3017 for (i = 0; i < serial->interface->altsetting[0]
3018 .desc.bNumEndpoints; ++i) {
3019 struct usb_endpoint_descriptor *endpoint;
3020 int buffer_size;
3021
3022 endpoint = &serial->interface->altsetting[0].
3023 endpoint[i].desc;
3024 buffer_size = usb_endpoint_maxp(endpoint);
3025 if (!interrupt_in_found &&
3026 (usb_endpoint_is_int_in(endpoint))) {
3027 /* we found a interrupt in endpoint */
3028 dbg("found interrupt in");
3029
3030 /* not set up yet, so do it now */
3031 edge_serial->interrupt_read_urb =
3032 usb_alloc_urb(0, GFP_KERNEL);
3033 if (!edge_serial->interrupt_read_urb) {
3034 dev_err(&dev->dev, "out of memory\n");
3035 return -ENOMEM;
3036 }
3037 edge_serial->interrupt_in_buffer =
3038 kmalloc(buffer_size, GFP_KERNEL);
3039 if (!edge_serial->interrupt_in_buffer) {
3040 dev_err(&dev->dev, "out of memory\n");
3041 usb_free_urb(edge_serial->interrupt_read_urb);
3042 return -ENOMEM;
3043 }
3044 edge_serial->interrupt_in_endpoint =
3045 endpoint->bEndpointAddress;
3046
3047 /* set up our interrupt urb */
3048 usb_fill_int_urb(
3049 edge_serial->interrupt_read_urb,
3050 dev,
3051 usb_rcvintpipe(dev,
3052 endpoint->bEndpointAddress),
3053 edge_serial->interrupt_in_buffer,
3054 buffer_size,
3055 edge_interrupt_callback,
3056 edge_serial,
3057 endpoint->bInterval);
3058
3059 interrupt_in_found = true;
3060 }
3061
3062 if (!bulk_in_found &&
3063 (usb_endpoint_is_bulk_in(endpoint))) {
3064 /* we found a bulk in endpoint */
3065 dbg("found bulk in");
3066
3067 /* not set up yet, so do it now */
3068 edge_serial->read_urb =
3069 usb_alloc_urb(0, GFP_KERNEL);
3070 if (!edge_serial->read_urb) {
3071 dev_err(&dev->dev, "out of memory\n");
3072 return -ENOMEM;
3073 }
3074 edge_serial->bulk_in_buffer =
3075 kmalloc(buffer_size, GFP_KERNEL);
3076 if (!edge_serial->bulk_in_buffer) {
3077 dev_err(&dev->dev, "out of memory\n");
3078 usb_free_urb(edge_serial->read_urb);
3079 return -ENOMEM;
3080 }
3081 edge_serial->bulk_in_endpoint =
3082 endpoint->bEndpointAddress;
3083
3084 /* set up our bulk in urb */
3085 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3086 usb_rcvbulkpipe(dev,
3087 endpoint->bEndpointAddress),
3088 edge_serial->bulk_in_buffer,
3089 usb_endpoint_maxp(endpoint),
3090 edge_bulk_in_callback,
3091 edge_serial);
3092 bulk_in_found = true;
3093 }
3094
3095 if (!bulk_out_found &&
3096 (usb_endpoint_is_bulk_out(endpoint))) {
3097 /* we found a bulk out endpoint */
3098 dbg("found bulk out");
3099 edge_serial->bulk_out_endpoint =
3100 endpoint->bEndpointAddress;
3101 bulk_out_found = true;
3102 }
3103 }
3104
3105 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3106 dev_err(&dev->dev, "Error - the proper endpoints "
3107 "were not found!\n");
3108 return -ENODEV;
3109 }
3110
3111 /* start interrupt read for this edgeport this interrupt will
3112 * continue as long as the edgeport is connected */
3113 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3114 GFP_KERNEL);
3115 if (response)
3116 dev_err(&dev->dev,
3117 "%s - Error %d submitting control urb\n",
3118 __func__, response);
3119 }
3120 return response;
3121 }
3122
3123
3124 /****************************************************************************
3125 * edge_disconnect
3126 * This function is called whenever the device is removed from the usb bus.
3127 ****************************************************************************/
3128 static void edge_disconnect(struct usb_serial *serial)
3129 {
3130 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3131
3132 dbg("%s", __func__);
3133
3134 /* stop reads and writes on all ports */
3135 /* free up our endpoint stuff */
3136 if (edge_serial->is_epic) {
3137 usb_kill_urb(edge_serial->interrupt_read_urb);
3138 usb_free_urb(edge_serial->interrupt_read_urb);
3139 kfree(edge_serial->interrupt_in_buffer);
3140
3141 usb_kill_urb(edge_serial->read_urb);
3142 usb_free_urb(edge_serial->read_urb);
3143 kfree(edge_serial->bulk_in_buffer);
3144 }
3145 }
3146
3147
3148 /****************************************************************************
3149 * edge_release
3150 * This function is called when the device structure is deallocated.
3151 ****************************************************************************/
3152 static void edge_release(struct usb_serial *serial)
3153 {
3154 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3155
3156 dbg("%s", __func__);
3157
3158 kfree(edge_serial);
3159 }
3160
3161 static int edge_port_probe(struct usb_serial_port *port)
3162 {
3163 struct edgeport_port *edge_port;
3164
3165 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3166 if (!edge_port)
3167 return -ENOMEM;
3168
3169 spin_lock_init(&edge_port->ep_lock);
3170 edge_port->port = port;
3171
3172 usb_set_serial_port_data(port, edge_port);
3173
3174 return 0;
3175 }
3176
3177 static int edge_port_remove(struct usb_serial_port *port)
3178 {
3179 struct edgeport_port *edge_port;
3180
3181 edge_port = usb_get_serial_port_data(port);
3182 kfree(edge_port);
3183
3184 return 0;
3185 }
3186
3187 module_usb_serial_driver(serial_drivers, id_table_combined);
3188
3189 MODULE_AUTHOR(DRIVER_AUTHOR);
3190 MODULE_DESCRIPTION(DRIVER_DESC);
3191 MODULE_LICENSE("GPL");
3192 MODULE_FIRMWARE("edgeport/boot.fw");
3193 MODULE_FIRMWARE("edgeport/boot2.fw");
3194 MODULE_FIRMWARE("edgeport/down.fw");
3195 MODULE_FIRMWARE("edgeport/down2.fw");
3196
3197 module_param(debug, bool, S_IRUGO | S_IWUSR);
3198 MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux ARM platform port for MOXA ART SoC