?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
[linux-2.6.git] / drivers / usb / serial / io_edgeport.c
blobdc2803b5eb09c35fa25c75fd376474e42a327b03
1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/tty.h>
38 #include <linux/tty_driver.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/spinlock.h>
42 #include <linux/serial.h>
43 #include <linux/ioctl.h>
44 #include <linux/wait.h>
45 #include <linux/firmware.h>
46 #include <linux/ihex.h>
47 #include <linux/uaccess.h>
48 #include <linux/usb.h>
49 #include <linux/usb/serial.h>
50 #include "io_edgeport.h"
51 #include "io_ionsp.h" /* info for the iosp messages */
52 #include "io_16654.h" /* 16654 UART defines */
53
54 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
55 #define DRIVER_DESC "Edgeport USB Serial Driver"
56
57 #define MAX_NAME_LEN 64
58
59 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
60 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
61 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
62
63 /* receive port state */
64 enum RXSTATE {
65 EXPECT_HDR1 = 0, /* Expect header byte 1 */
66 EXPECT_HDR2 = 1, /* Expect header byte 2 */
67 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
68 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
69 };
70
71
72 /* Transmit Fifo
73 * This Transmit queue is an extension of the edgeport Rx buffer.
74 * The maximum amount of data buffered in both the edgeport
75 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
76 */
77 struct TxFifo {
78 unsigned int head; /* index to head pointer (write) */
79 unsigned int tail; /* index to tail pointer (read) */
80 unsigned int count; /* Bytes in queue */
81 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
82 unsigned char *fifo; /* allocated Buffer */
83 };
84
85 /* This structure holds all of the local port information */
86 struct edgeport_port {
87 __u16 txCredits; /* our current credits for this port */
88 __u16 maxTxCredits; /* the max size of the port */
89
90 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
91 struct urb *write_urb; /* write URB for this port */
92 bool write_in_progress; /* 'true' while a write URB is outstanding */
93 spinlock_t ep_lock;
94
95 __u8 shadowLCR; /* last LCR value received */
96 __u8 shadowMCR; /* last MCR value received */
97 __u8 shadowMSR; /* last MSR value received */
98 __u8 shadowLSR; /* last LSR value received */
99 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
100 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
101 __u8 validDataMask;
102 __u32 baudRate;
103
104 bool open;
105 bool openPending;
106 bool commandPending;
107 bool closePending;
108 bool chaseResponsePending;
109
110 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
111 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
112 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
113
114 struct usb_serial_port *port; /* loop back to the owner of this object */
115 };
116
117
118 /* This structure holds all of the individual device information */
119 struct edgeport_serial {
120 char name[MAX_NAME_LEN+2]; /* string name of this device */
121
122 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
123 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
124 struct edgeport_product_info product_info; /* Product Info */
125 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
126 int is_epic; /* flag if EPiC device or not */
127
128 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
129 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
130 struct urb *interrupt_read_urb; /* our interrupt urb */
131
132 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
133 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
134 struct urb *read_urb; /* our bulk read urb */
135 bool read_in_progress;
136 spinlock_t es_lock;
137
138 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
139
140 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
141
142 enum RXSTATE rxState; /* the current state of the bulk receive processor */
143 __u8 rxHeader1; /* receive header byte 1 */
144 __u8 rxHeader2; /* receive header byte 2 */
145 __u8 rxHeader3; /* receive header byte 3 */
146 __u8 rxPort; /* the port that we are currently receiving data for */
147 __u8 rxStatusCode; /* the receive status code */
148 __u8 rxStatusParam; /* the receive status paramater */
149 __s16 rxBytesRemaining; /* the number of port bytes left to read */
150 struct usb_serial *serial; /* loop back to the owner of this object */
151 };
152
153 /* baud rate information */
154 struct divisor_table_entry {
155 __u32 BaudRate;
156 __u16 Divisor;
157 };
158
159 /*
160 * Define table of divisors for Rev A EdgePort/4 hardware
161 * These assume a 3.6864MHz crystal, the standard /16, and
162 * MCR.7 = 0.
163 */
164
165 static const struct divisor_table_entry divisor_table[] = {
166 { 50, 4608},
167 { 75, 3072},
168 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
169 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
170 { 150, 1536},
171 { 300, 768},
172 { 600, 384},
173 { 1200, 192},
174 { 1800, 128},
175 { 2400, 96},
176 { 4800, 48},
177 { 7200, 32},
178 { 9600, 24},
179 { 14400, 16},
180 { 19200, 12},
181 { 38400, 6},
182 { 57600, 4},
183 { 115200, 2},
184 { 230400, 1},
185 };
186
187 /* Number of outstanding Command Write Urbs */
188 static atomic_t CmdUrbs = ATOMIC_INIT(0);
189
190
191 /* local function prototypes */
192
193 /* function prototypes for all URB callbacks */
194 static void edge_interrupt_callback(struct urb *urb);
195 static void edge_bulk_in_callback(struct urb *urb);
196 static void edge_bulk_out_data_callback(struct urb *urb);
197 static void edge_bulk_out_cmd_callback(struct urb *urb);
198
199 /* function prototypes for the usbserial callbacks */
200 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
201 static void edge_close(struct usb_serial_port *port);
202 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
203 const unsigned char *buf, int count);
204 static int edge_write_room(struct tty_struct *tty);
205 static int edge_chars_in_buffer(struct tty_struct *tty);
206 static void edge_throttle(struct tty_struct *tty);
207 static void edge_unthrottle(struct tty_struct *tty);
208 static void edge_set_termios(struct tty_struct *tty,
209 struct usb_serial_port *port,
210 struct ktermios *old_termios);
211 static int edge_ioctl(struct tty_struct *tty,
212 unsigned int cmd, unsigned long arg);
213 static void edge_break(struct tty_struct *tty, int break_state);
214 static int edge_tiocmget(struct tty_struct *tty);
215 static int edge_tiocmset(struct tty_struct *tty,
216 unsigned int set, unsigned int clear);
217 static int edge_startup(struct usb_serial *serial);
218 static void edge_disconnect(struct usb_serial *serial);
219 static void edge_release(struct usb_serial *serial);
220 static int edge_port_probe(struct usb_serial_port *port);
221 static int edge_port_remove(struct usb_serial_port *port);
222
223 #include "io_tables.h" /* all of the devices that this driver supports */
224
225 /* function prototypes for all of our local functions */
226
227 static void process_rcvd_data(struct edgeport_serial *edge_serial,
228 unsigned char *buffer, __u16 bufferLength);
229 static void process_rcvd_status(struct edgeport_serial *edge_serial,
230 __u8 byte2, __u8 byte3);
231 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
232 int length);
233 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
234 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
235 __u8 lsr, __u8 data);
236 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
237 __u8 param);
238 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
239 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
240 int baudRate);
241 static void change_port_settings(struct tty_struct *tty,
242 struct edgeport_port *edge_port,
243 struct ktermios *old_termios);
244 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
245 __u8 regNum, __u8 regValue);
246 static int write_cmd_usb(struct edgeport_port *edge_port,
247 unsigned char *buffer, int writeLength);
248 static void send_more_port_data(struct edgeport_serial *edge_serial,
249 struct edgeport_port *edge_port);
250
251 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
252 __u16 length, const __u8 *data);
253 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
254 __u16 length, __u8 *data);
255 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
256 __u16 length, const __u8 *data);
257 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
258 static void get_boot_desc(struct edgeport_serial *edge_serial);
259 static void load_application_firmware(struct edgeport_serial *edge_serial);
260
261 static void unicode_to_ascii(char *string, int buflen,
262 __le16 *unicode, int unicode_size);
263
264
265 /* ************************************************************************ */
266 /* ************************************************************************ */
267 /* ************************************************************************ */
268 /* ************************************************************************ */
269
270 /************************************************************************
271 * *
272 * update_edgeport_E2PROM() Compare current versions of *
273 * Boot ROM and Manufacture *
274 * Descriptors with versions *
275 * embedded in this driver *
276 * *
277 ************************************************************************/
278 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
279 {
280 struct device *dev = &edge_serial->serial->dev->dev;
281 __u32 BootCurVer;
282 __u32 BootNewVer;
283 __u8 BootMajorVersion;
284 __u8 BootMinorVersion;
285 __u16 BootBuildNumber;
286 __u32 Bootaddr;
287 const struct ihex_binrec *rec;
288 const struct firmware *fw;
289 const char *fw_name;
290 int response;
291
292 switch (edge_serial->product_info.iDownloadFile) {
293 case EDGE_DOWNLOAD_FILE_I930:
294 fw_name = "edgeport/boot.fw";
295 break;
296 case EDGE_DOWNLOAD_FILE_80251:
297 fw_name = "edgeport/boot2.fw";
298 break;
299 default:
300 return;
301 }
302
303 response = request_ihex_firmware(&fw, fw_name,
304 &edge_serial->serial->dev->dev);
305 if (response) {
306 dev_err(dev, "Failed to load image \"%s\" err %d\n",
307 fw_name, response);
308 return;
309 }
310
311 rec = (const struct ihex_binrec *)fw->data;
312 BootMajorVersion = rec->data[0];
313 BootMinorVersion = rec->data[1];
314 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
315
316 /* Check Boot Image Version */
317 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
318 (edge_serial->boot_descriptor.MinorVersion << 16) +
319 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
320
321 BootNewVer = (BootMajorVersion << 24) +
322 (BootMinorVersion << 16) +
323 BootBuildNumber;
324
325 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
326 edge_serial->boot_descriptor.MajorVersion,
327 edge_serial->boot_descriptor.MinorVersion,
328 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
329
330
331 if (BootNewVer > BootCurVer) {
332 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
333 edge_serial->boot_descriptor.MajorVersion,
334 edge_serial->boot_descriptor.MinorVersion,
335 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
336 BootMajorVersion, BootMinorVersion, BootBuildNumber);
337
338 dev_dbg(dev, "Downloading new Boot Image\n");
339
340 for (rec = ihex_next_binrec(rec); rec;
341 rec = ihex_next_binrec(rec)) {
342 Bootaddr = be32_to_cpu(rec->addr);
343 response = rom_write(edge_serial->serial,
344 Bootaddr >> 16,
345 Bootaddr & 0xFFFF,
346 be16_to_cpu(rec->len),
347 &rec->data[0]);
348 if (response < 0) {
349 dev_err(&edge_serial->serial->dev->dev,
350 "rom_write failed (%x, %x, %d)\n",
351 Bootaddr >> 16, Bootaddr & 0xFFFF,
352 be16_to_cpu(rec->len));
353 break;
354 }
355 }
356 } else {
357 dev_dbg(dev, "Boot Image -- already up to date\n");
358 }
359 release_firmware(fw);
360 }
361
362 #if 0
363 /************************************************************************
364 *
365 * Get string descriptor from device
366 *
367 ************************************************************************/
368 static int get_string_desc(struct usb_device *dev, int Id,
369 struct usb_string_descriptor **pRetDesc)
370 {
371 struct usb_string_descriptor StringDesc;
372 struct usb_string_descriptor *pStringDesc;
373
374 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
375
376 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
377 sizeof(StringDesc)))
378 return 0;
379
380 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
381 if (!pStringDesc)
382 return -1;
383
384 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
385 StringDesc.bLength)) {
386 kfree(pStringDesc);
387 return -1;
388 }
389
390 *pRetDesc = pStringDesc;
391 return 0;
392 }
393 #endif
394
395 static void dump_product_info(struct edgeport_serial *edge_serial,
396 struct edgeport_product_info *product_info)
397 {
398 struct device *dev = &edge_serial->serial->dev->dev;
399
400 /* Dump Product Info structure */
401 dev_dbg(dev, "**Product Information:\n");
402 dev_dbg(dev, " ProductId %x\n", product_info->ProductId);
403 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts);
404 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer);
405 dev_dbg(dev, " IsServer %d\n", product_info->IsServer);
406 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232);
407 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422);
408 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485);
409 dev_dbg(dev, " RomSize %d\n", product_info->RomSize);
410 dev_dbg(dev, " RamSize %d\n", product_info->RamSize);
411 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev);
412 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev);
413 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n",
414 product_info->BootMajorVersion,
415 product_info->BootMinorVersion,
416 le16_to_cpu(product_info->BootBuildNumber));
417 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n",
418 product_info->FirmwareMajorVersion,
419 product_info->FirmwareMinorVersion,
420 le16_to_cpu(product_info->FirmwareBuildNumber));
421 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n",
422 product_info->ManufactureDescDate[0],
423 product_info->ManufactureDescDate[1],
424 product_info->ManufactureDescDate[2]+1900);
425 dev_dbg(dev, " iDownloadFile 0x%x\n",
426 product_info->iDownloadFile);
427 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer);
428 }
429
430 static void get_product_info(struct edgeport_serial *edge_serial)
431 {
432 struct edgeport_product_info *product_info = &edge_serial->product_info;
433
434 memset(product_info, 0, sizeof(struct edgeport_product_info));
435
436 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
437 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
438 product_info->ProdInfoVer = 0;
439
440 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
441 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
442 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
443 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
444
445 product_info->BootMajorVersion =
446 edge_serial->boot_descriptor.MajorVersion;
447 product_info->BootMinorVersion =
448 edge_serial->boot_descriptor.MinorVersion;
449 product_info->BootBuildNumber =
450 edge_serial->boot_descriptor.BuildNumber;
451
452 memcpy(product_info->ManufactureDescDate,
453 edge_serial->manuf_descriptor.DescDate,
454 sizeof(edge_serial->manuf_descriptor.DescDate));
455
456 /* check if this is 2nd generation hardware */
457 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
458 & ION_DEVICE_ID_80251_NETCHIP)
459 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
460 else
461 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
462
463 /* Determine Product type and set appropriate flags */
464 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
465 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
466 case ION_DEVICE_ID_EDGEPORT_4T:
467 case ION_DEVICE_ID_EDGEPORT_4:
468 case ION_DEVICE_ID_EDGEPORT_2:
469 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
470 case ION_DEVICE_ID_EDGEPORT_8:
471 case ION_DEVICE_ID_EDGEPORT_421:
472 case ION_DEVICE_ID_EDGEPORT_21:
473 case ION_DEVICE_ID_EDGEPORT_2_DIN:
474 case ION_DEVICE_ID_EDGEPORT_4_DIN:
475 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
476 product_info->IsRS232 = 1;
477 break;
478
479 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
480 product_info->IsRS422 = 1;
481 product_info->IsRS485 = 1;
482 break;
483
484 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
485 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
486 product_info->IsRS422 = 1;
487 break;
488 }
489
490 dump_product_info(edge_serial, product_info);
491 }
492
493 static int get_epic_descriptor(struct edgeport_serial *ep)
494 {
495 int result;
496 struct usb_serial *serial = ep->serial;
497 struct edgeport_product_info *product_info = &ep->product_info;
498 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
499 struct edge_compatibility_bits *bits;
500 struct device *dev = &serial->dev->dev;
501
502 ep->is_epic = 0;
503 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
504 USB_REQUEST_ION_GET_EPIC_DESC,
505 0xC0, 0x00, 0x00,
506 &ep->epic_descriptor,
507 sizeof(struct edge_compatibility_descriptor),
508 300);
509
510 if (result > 0) {
511 ep->is_epic = 1;
512 memset(product_info, 0, sizeof(struct edgeport_product_info));
513
514 product_info->NumPorts = epic->NumPorts;
515 product_info->ProdInfoVer = 0;
516 product_info->FirmwareMajorVersion = epic->MajorVersion;
517 product_info->FirmwareMinorVersion = epic->MinorVersion;
518 product_info->FirmwareBuildNumber = epic->BuildNumber;
519 product_info->iDownloadFile = epic->iDownloadFile;
520 product_info->EpicVer = epic->EpicVer;
521 product_info->Epic = epic->Supports;
522 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
523 dump_product_info(ep, product_info);
524
525 bits = &ep->epic_descriptor.Supports;
526 dev_dbg(dev, "**EPIC descriptor:\n");
527 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
528 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE");
529 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE");
530 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE");
531 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
532 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
533 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE");
534 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
535 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
536 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE");
537 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE");
538 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
539 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE");
540 }
541
542 return result;
543 }
544
545
546 /************************************************************************/
547 /************************************************************************/
548 /* U S B C A L L B A C K F U N C T I O N S */
549 /* U S B C A L L B A C K F U N C T I O N S */
550 /************************************************************************/
551 /************************************************************************/
552
553 /*****************************************************************************
554 * edge_interrupt_callback
555 * this is the callback function for when we have received data on the
556 * interrupt endpoint.
557 *****************************************************************************/
558 static void edge_interrupt_callback(struct urb *urb)
559 {
560 struct edgeport_serial *edge_serial = urb->context;
561 struct device *dev;
562 struct edgeport_port *edge_port;
563 struct usb_serial_port *port;
564 unsigned char *data = urb->transfer_buffer;
565 int length = urb->actual_length;
566 int bytes_avail;
567 int position;
568 int txCredits;
569 int portNumber;
570 int result;
571 int status = urb->status;
572
573 switch (status) {
574 case 0:
575 /* success */
576 break;
577 case -ECONNRESET:
578 case -ENOENT:
579 case -ESHUTDOWN:
580 /* this urb is terminated, clean up */
581 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
582 return;
583 default:
584 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
585 goto exit;
586 }
587
588 dev = &edge_serial->serial->dev->dev;
589
590 /* process this interrupt-read even if there are no ports open */
591 if (length) {
592 usb_serial_debug_data(dev, __func__, length, data);
593
594 if (length > 1) {
595 bytes_avail = data[0] | (data[1] << 8);
596 if (bytes_avail) {
597 spin_lock(&edge_serial->es_lock);
598 edge_serial->rxBytesAvail += bytes_avail;
599 dev_dbg(dev,
600 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
601 __func__, bytes_avail,
602 edge_serial->rxBytesAvail,
603 edge_serial->read_in_progress);
604
605 if (edge_serial->rxBytesAvail > 0 &&
606 !edge_serial->read_in_progress) {
607 dev_dbg(dev, "%s - posting a read\n", __func__);
608 edge_serial->read_in_progress = true;
609
610 /* we have pending bytes on the
611 bulk in pipe, send a request */
612 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
613 if (result) {
614 dev_err(dev,
615 "%s - usb_submit_urb(read bulk) failed with result = %d\n",
616 __func__, result);
617 edge_serial->read_in_progress = false;
618 }
619 }
620 spin_unlock(&edge_serial->es_lock);
621 }
622 }
623 /* grab the txcredits for the ports if available */
624 position = 2;
625 portNumber = 0;
626 while ((position < length) &&
627 (portNumber < edge_serial->serial->num_ports)) {
628 txCredits = data[position] | (data[position+1] << 8);
629 if (txCredits) {
630 port = edge_serial->serial->port[portNumber];
631 edge_port = usb_get_serial_port_data(port);
632 if (edge_port->open) {
633 spin_lock(&edge_port->ep_lock);
634 edge_port->txCredits += txCredits;
635 spin_unlock(&edge_port->ep_lock);
636 dev_dbg(dev, "%s - txcredits for port%d = %d\n",
637 __func__, portNumber,
638 edge_port->txCredits);
639
640 /* tell the tty driver that something
641 has changed */
642 tty_port_tty_wakeup(&edge_port->port->port);
643 /* Since we have more credit, check
644 if more data can be sent */
645 send_more_port_data(edge_serial,
646 edge_port);
647 }
648 }
649 position += 2;
650 ++portNumber;
651 }
652 }
653
654 exit:
655 result = usb_submit_urb(urb, GFP_ATOMIC);
656 if (result)
657 dev_err(&urb->dev->dev,
658 "%s - Error %d submitting control urb\n",
659 __func__, result);
660 }
661
662
663 /*****************************************************************************
664 * edge_bulk_in_callback
665 * this is the callback function for when we have received data on the
666 * bulk in endpoint.
667 *****************************************************************************/
668 static void edge_bulk_in_callback(struct urb *urb)
669 {
670 struct edgeport_serial *edge_serial = urb->context;
671 struct device *dev;
672 unsigned char *data = urb->transfer_buffer;
673 int retval;
674 __u16 raw_data_length;
675 int status = urb->status;
676
677 if (status) {
678 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
679 __func__, status);
680 edge_serial->read_in_progress = false;
681 return;
682 }
683
684 if (urb->actual_length == 0) {
685 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
686 edge_serial->read_in_progress = false;
687 return;
688 }
689
690 dev = &edge_serial->serial->dev->dev;
691 raw_data_length = urb->actual_length;
692
693 usb_serial_debug_data(dev, __func__, raw_data_length, data);
694
695 spin_lock(&edge_serial->es_lock);
696
697 /* decrement our rxBytes available by the number that we just got */
698 edge_serial->rxBytesAvail -= raw_data_length;
699
700 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
701 raw_data_length, edge_serial->rxBytesAvail);
702
703 process_rcvd_data(edge_serial, data, urb->actual_length);
704
705 /* check to see if there's any more data for us to read */
706 if (edge_serial->rxBytesAvail > 0) {
707 dev_dbg(dev, "%s - posting a read\n", __func__);
708 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
709 if (retval) {
710 dev_err(dev,
711 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
712 __func__, retval);
713 edge_serial->read_in_progress = false;
714 }
715 } else {
716 edge_serial->read_in_progress = false;
717 }
718
719 spin_unlock(&edge_serial->es_lock);
720 }
721
722
723 /*****************************************************************************
724 * edge_bulk_out_data_callback
725 * this is the callback function for when we have finished sending
726 * serial data on the bulk out endpoint.
727 *****************************************************************************/
728 static void edge_bulk_out_data_callback(struct urb *urb)
729 {
730 struct edgeport_port *edge_port = urb->context;
731 int status = urb->status;
732
733 if (status) {
734 dev_dbg(&urb->dev->dev,
735 "%s - nonzero write bulk status received: %d\n",
736 __func__, status);
737 }
738
739 if (edge_port->open)
740 tty_port_tty_wakeup(&edge_port->port->port);
741
742 /* Release the Write URB */
743 edge_port->write_in_progress = false;
744
745 /* Check if more data needs to be sent */
746 send_more_port_data((struct edgeport_serial *)
747 (usb_get_serial_data(edge_port->port->serial)), edge_port);
748 }
749
750
751 /*****************************************************************************
752 * BulkOutCmdCallback
753 * this is the callback function for when we have finished sending a
754 * command on the bulk out endpoint.
755 *****************************************************************************/
756 static void edge_bulk_out_cmd_callback(struct urb *urb)
757 {
758 struct edgeport_port *edge_port = urb->context;
759 int status = urb->status;
760
761 atomic_dec(&CmdUrbs);
762 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
763 __func__, urb, atomic_read(&CmdUrbs));
764
765
766 /* clean up the transfer buffer */
767 kfree(urb->transfer_buffer);
768
769 /* Free the command urb */
770 usb_free_urb(urb);
771
772 if (status) {
773 dev_dbg(&urb->dev->dev,
774 "%s - nonzero write bulk status received: %d\n",
775 __func__, status);
776 return;
777 }
778
779 /* tell the tty driver that something has changed */
780 if (edge_port->open)
781 tty_port_tty_wakeup(&edge_port->port->port);
782
783 /* we have completed the command */
784 edge_port->commandPending = false;
785 wake_up(&edge_port->wait_command);
786 }
787
788
789 /*****************************************************************************
790 * Driver tty interface functions
791 *****************************************************************************/
792
793 /*****************************************************************************
794 * SerialOpen
795 * this function is called by the tty driver when a port is opened
796 * If successful, we return 0
797 * Otherwise we return a negative error number.
798 *****************************************************************************/
799 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
800 {
801 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
802 struct device *dev = &port->dev;
803 struct usb_serial *serial;
804 struct edgeport_serial *edge_serial;
805 int response;
806
807 if (edge_port == NULL)
808 return -ENODEV;
809
810 /* see if we've set up our endpoint info yet (can't set it up
811 in edge_startup as the structures were not set up at that time.) */
812 serial = port->serial;
813 edge_serial = usb_get_serial_data(serial);
814 if (edge_serial == NULL)
815 return -ENODEV;
816 if (edge_serial->interrupt_in_buffer == NULL) {
817 struct usb_serial_port *port0 = serial->port[0];
818
819 /* not set up yet, so do it now */
820 edge_serial->interrupt_in_buffer =
821 port0->interrupt_in_buffer;
822 edge_serial->interrupt_in_endpoint =
823 port0->interrupt_in_endpointAddress;
824 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
825 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
826 edge_serial->bulk_in_endpoint =
827 port0->bulk_in_endpointAddress;
828 edge_serial->read_urb = port0->read_urb;
829 edge_serial->bulk_out_endpoint =
830 port0->bulk_out_endpointAddress;
831
832 /* set up our interrupt urb */
833 usb_fill_int_urb(edge_serial->interrupt_read_urb,
834 serial->dev,
835 usb_rcvintpipe(serial->dev,
836 port0->interrupt_in_endpointAddress),
837 port0->interrupt_in_buffer,
838 edge_serial->interrupt_read_urb->transfer_buffer_length,
839 edge_interrupt_callback, edge_serial,
840 edge_serial->interrupt_read_urb->interval);
841
842 /* set up our bulk in urb */
843 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
844 usb_rcvbulkpipe(serial->dev,
845 port0->bulk_in_endpointAddress),
846 port0->bulk_in_buffer,
847 edge_serial->read_urb->transfer_buffer_length,
848 edge_bulk_in_callback, edge_serial);
849 edge_serial->read_in_progress = false;
850
851 /* start interrupt read for this edgeport
852 * this interrupt will continue as long
853 * as the edgeport is connected */
854 response = usb_submit_urb(edge_serial->interrupt_read_urb,
855 GFP_KERNEL);
856 if (response) {
857 dev_err(dev, "%s - Error %d submitting control urb\n",
858 __func__, response);
859 }
860 }
861
862 /* initialize our wait queues */
863 init_waitqueue_head(&edge_port->wait_open);
864 init_waitqueue_head(&edge_port->wait_chase);
865 init_waitqueue_head(&edge_port->wait_command);
866
867 /* initialize our port settings */
868 edge_port->txCredits = 0; /* Can't send any data yet */
869 /* Must always set this bit to enable ints! */
870 edge_port->shadowMCR = MCR_MASTER_IE;
871 edge_port->chaseResponsePending = false;
872
873 /* send a open port command */
874 edge_port->openPending = true;
875 edge_port->open = false;
876 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
877
878 if (response < 0) {
879 dev_err(dev, "%s - error sending open port command\n", __func__);
880 edge_port->openPending = false;
881 return -ENODEV;
882 }
883
884 /* now wait for the port to be completely opened */
885 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
886 OPEN_TIMEOUT);
887
888 if (!edge_port->open) {
889 /* open timed out */
890 dev_dbg(dev, "%s - open timedout\n", __func__);
891 edge_port->openPending = false;
892 return -ENODEV;
893 }
894
895 /* create the txfifo */
896 edge_port->txfifo.head = 0;
897 edge_port->txfifo.tail = 0;
898 edge_port->txfifo.count = 0;
899 edge_port->txfifo.size = edge_port->maxTxCredits;
900 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
901
902 if (!edge_port->txfifo.fifo) {
903 dev_dbg(dev, "%s - no memory\n", __func__);
904 edge_close(port);
905 return -ENOMEM;
906 }
907
908 /* Allocate a URB for the write */
909 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
910 edge_port->write_in_progress = false;
911
912 if (!edge_port->write_urb) {
913 dev_dbg(dev, "%s - no memory\n", __func__);
914 edge_close(port);
915 return -ENOMEM;
916 }
917
918 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
919 __func__, edge_port->maxTxCredits);
920
921 return 0;
922 }
923
924
925 /************************************************************************
926 *
927 * block_until_chase_response
928 *
929 * This function will block the close until one of the following:
930 * 1. Response to our Chase comes from Edgeport
931 * 2. A timeout of 10 seconds without activity has expired
932 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
933 *
934 ************************************************************************/
935 static void block_until_chase_response(struct edgeport_port *edge_port)
936 {
937 struct device *dev = &edge_port->port->dev;
938 DEFINE_WAIT(wait);
939 __u16 lastCredits;
940 int timeout = 1*HZ;
941 int loop = 10;
942
943 while (1) {
944 /* Save Last credits */
945 lastCredits = edge_port->txCredits;
946
947 /* Did we get our Chase response */
948 if (!edge_port->chaseResponsePending) {
949 dev_dbg(dev, "%s - Got Chase Response\n", __func__);
950
951 /* did we get all of our credit back? */
952 if (edge_port->txCredits == edge_port->maxTxCredits) {
953 dev_dbg(dev, "%s - Got all credits\n", __func__);
954 return;
955 }
956 }
957
958 /* Block the thread for a while */
959 prepare_to_wait(&edge_port->wait_chase, &wait,
960 TASK_UNINTERRUPTIBLE);
961 schedule_timeout(timeout);
962 finish_wait(&edge_port->wait_chase, &wait);
963
964 if (lastCredits == edge_port->txCredits) {
965 /* No activity.. count down. */
966 loop--;
967 if (loop == 0) {
968 edge_port->chaseResponsePending = false;
969 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
970 return;
971 }
972 } else {
973 /* Reset timeout value back to 10 seconds */
974 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
975 lastCredits, edge_port->txCredits);
976 loop = 10;
977 }
978 }
979 }
980
981
982 /************************************************************************
983 *
984 * block_until_tx_empty
985 *
986 * This function will block the close until one of the following:
987 * 1. TX count are 0
988 * 2. The edgeport has stopped
989 * 3. A timeout of 3 seconds without activity has expired
990 *
991 ************************************************************************/
992 static void block_until_tx_empty(struct edgeport_port *edge_port)
993 {
994 struct device *dev = &edge_port->port->dev;
995 DEFINE_WAIT(wait);
996 struct TxFifo *fifo = &edge_port->txfifo;
997 __u32 lastCount;
998 int timeout = HZ/10;
999 int loop = 30;
1000
1001 while (1) {
1002 /* Save Last count */
1003 lastCount = fifo->count;
1004
1005 /* Is the Edgeport Buffer empty? */
1006 if (lastCount == 0) {
1007 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1008 return;
1009 }
1010
1011 /* Block the thread for a while */
1012 prepare_to_wait(&edge_port->wait_chase, &wait,
1013 TASK_UNINTERRUPTIBLE);
1014 schedule_timeout(timeout);
1015 finish_wait(&edge_port->wait_chase, &wait);
1016
1017 dev_dbg(dev, "%s wait\n", __func__);
1018
1019 if (lastCount == fifo->count) {
1020 /* No activity.. count down. */
1021 loop--;
1022 if (loop == 0) {
1023 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1024 return;
1025 }
1026 } else {
1027 /* Reset timeout value back to seconds */
1028 loop = 30;
1029 }
1030 }
1031 }
1032
1033
1034 /*****************************************************************************
1035 * edge_close
1036 * this function is called by the tty driver when a port is closed
1037 *****************************************************************************/
1038 static void edge_close(struct usb_serial_port *port)
1039 {
1040 struct edgeport_serial *edge_serial;
1041 struct edgeport_port *edge_port;
1042 int status;
1043
1044 edge_serial = usb_get_serial_data(port->serial);
1045 edge_port = usb_get_serial_port_data(port);
1046 if (edge_serial == NULL || edge_port == NULL)
1047 return;
1048
1049 /* block until tx is empty */
1050 block_until_tx_empty(edge_port);
1051
1052 edge_port->closePending = true;
1053
1054 if ((!edge_serial->is_epic) ||
1055 ((edge_serial->is_epic) &&
1056 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1057 /* flush and chase */
1058 edge_port->chaseResponsePending = true;
1059
1060 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1061 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1062 if (status == 0)
1063 /* block until chase finished */
1064 block_until_chase_response(edge_port);
1065 else
1066 edge_port->chaseResponsePending = false;
1067 }
1068
1069 if ((!edge_serial->is_epic) ||
1070 ((edge_serial->is_epic) &&
1071 (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1072 /* close the port */
1073 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1074 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1075 }
1076
1077 /* port->close = true; */
1078 edge_port->closePending = false;
1079 edge_port->open = false;
1080 edge_port->openPending = false;
1081
1082 usb_kill_urb(edge_port->write_urb);
1083
1084 if (edge_port->write_urb) {
1085 /* if this urb had a transfer buffer already
1086 (old transfer) free it */
1087 kfree(edge_port->write_urb->transfer_buffer);
1088 usb_free_urb(edge_port->write_urb);
1089 edge_port->write_urb = NULL;
1090 }
1091 kfree(edge_port->txfifo.fifo);
1092 edge_port->txfifo.fifo = NULL;
1093 }
1094
1095 /*****************************************************************************
1096 * SerialWrite
1097 * this function is called by the tty driver when data should be written
1098 * to the port.
1099 * If successful, we return the number of bytes written, otherwise we
1100 * return a negative error number.
1101 *****************************************************************************/
1102 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1103 const unsigned char *data, int count)
1104 {
1105 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1106 struct TxFifo *fifo;
1107 int copySize;
1108 int bytesleft;
1109 int firsthalf;
1110 int secondhalf;
1111 unsigned long flags;
1112
1113 if (edge_port == NULL)
1114 return -ENODEV;
1115
1116 /* get a pointer to the Tx fifo */
1117 fifo = &edge_port->txfifo;
1118
1119 spin_lock_irqsave(&edge_port->ep_lock, flags);
1120
1121 /* calculate number of bytes to put in fifo */
1122 copySize = min((unsigned int)count,
1123 (edge_port->txCredits - fifo->count));
1124
1125 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n",
1126 __func__, count, edge_port->txCredits - fifo->count, copySize);
1127
1128 /* catch writes of 0 bytes which the tty driver likes to give us,
1129 and when txCredits is empty */
1130 if (copySize == 0) {
1131 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1132 goto finish_write;
1133 }
1134
1135 /* queue the data
1136 * since we can never overflow the buffer we do not have to check for a
1137 * full condition
1138 *
1139 * the copy is done is two parts -- first fill to the end of the buffer
1140 * then copy the reset from the start of the buffer
1141 */
1142 bytesleft = fifo->size - fifo->head;
1143 firsthalf = min(bytesleft, copySize);
1144 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1145 firsthalf, bytesleft);
1146
1147 /* now copy our data */
1148 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1149 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1150
1151 /* update the index and size */
1152 fifo->head += firsthalf;
1153 fifo->count += firsthalf;
1154
1155 /* wrap the index */
1156 if (fifo->head == fifo->size)
1157 fifo->head = 0;
1158
1159 secondhalf = copySize-firsthalf;
1160
1161 if (secondhalf) {
1162 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1163 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1164 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1165 /* update the index and size */
1166 fifo->count += secondhalf;
1167 fifo->head += secondhalf;
1168 /* No need to check for wrap since we can not get to end of
1169 * the fifo in this part
1170 */
1171 }
1172
1173 finish_write:
1174 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1175
1176 send_more_port_data((struct edgeport_serial *)
1177 usb_get_serial_data(port->serial), edge_port);
1178
1179 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1180 __func__, copySize, edge_port->txCredits, fifo->count);
1181
1182 return copySize;
1183 }
1184
1185
1186 /************************************************************************
1187 *
1188 * send_more_port_data()
1189 *
1190 * This routine attempts to write additional UART transmit data
1191 * to a port over the USB bulk pipe. It is called (1) when new
1192 * data has been written to a port's TxBuffer from higher layers
1193 * (2) when the peripheral sends us additional TxCredits indicating
1194 * that it can accept more Tx data for a given port; and (3) when
1195 * a bulk write completes successfully and we want to see if we
1196 * can transmit more.
1197 *
1198 ************************************************************************/
1199 static void send_more_port_data(struct edgeport_serial *edge_serial,
1200 struct edgeport_port *edge_port)
1201 {
1202 struct TxFifo *fifo = &edge_port->txfifo;
1203 struct device *dev = &edge_port->port->dev;
1204 struct urb *urb;
1205 unsigned char *buffer;
1206 int status;
1207 int count;
1208 int bytesleft;
1209 int firsthalf;
1210 int secondhalf;
1211 unsigned long flags;
1212
1213 spin_lock_irqsave(&edge_port->ep_lock, flags);
1214
1215 if (edge_port->write_in_progress ||
1216 !edge_port->open ||
1217 (fifo->count == 0)) {
1218 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1219 __func__, fifo->count, edge_port->write_in_progress);
1220 goto exit_send;
1221 }
1222
1223 /* since the amount of data in the fifo will always fit into the
1224 * edgeport buffer we do not need to check the write length
1225 *
1226 * Do we have enough credits for this port to make it worthwhile
1227 * to bother queueing a write. If it's too small, say a few bytes,
1228 * it's better to wait for more credits so we can do a larger write.
1229 */
1230 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1231 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1232 __func__, fifo->count, edge_port->txCredits);
1233 goto exit_send;
1234 }
1235
1236 /* lock this write */
1237 edge_port->write_in_progress = true;
1238
1239 /* get a pointer to the write_urb */
1240 urb = edge_port->write_urb;
1241
1242 /* make sure transfer buffer is freed */
1243 kfree(urb->transfer_buffer);
1244 urb->transfer_buffer = NULL;
1245
1246 /* build the data header for the buffer and port that we are about
1247 to send out */
1248 count = fifo->count;
1249 buffer = kmalloc(count+2, GFP_ATOMIC);
1250 if (buffer == NULL) {
1251 dev_err_console(edge_port->port,
1252 "%s - no more kernel memory...\n", __func__);
1253 edge_port->write_in_progress = false;
1254 goto exit_send;
1255 }
1256 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1257 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1258
1259 /* now copy our data */
1260 bytesleft = fifo->size - fifo->tail;
1261 firsthalf = min(bytesleft, count);
1262 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1263 fifo->tail += firsthalf;
1264 fifo->count -= firsthalf;
1265 if (fifo->tail == fifo->size)
1266 fifo->tail = 0;
1267
1268 secondhalf = count-firsthalf;
1269 if (secondhalf) {
1270 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1271 secondhalf);
1272 fifo->tail += secondhalf;
1273 fifo->count -= secondhalf;
1274 }
1275
1276 if (count)
1277 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1278
1279 /* fill up the urb with all of our data and submit it */
1280 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1281 usb_sndbulkpipe(edge_serial->serial->dev,
1282 edge_serial->bulk_out_endpoint),
1283 buffer, count+2,
1284 edge_bulk_out_data_callback, edge_port);
1285
1286 /* decrement the number of credits we have by the number we just sent */
1287 edge_port->txCredits -= count;
1288 edge_port->port->icount.tx += count;
1289
1290 status = usb_submit_urb(urb, GFP_ATOMIC);
1291 if (status) {
1292 /* something went wrong */
1293 dev_err_console(edge_port->port,
1294 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1295 __func__, status);
1296 edge_port->write_in_progress = false;
1297
1298 /* revert the credits as something bad happened. */
1299 edge_port->txCredits += count;
1300 edge_port->port->icount.tx -= count;
1301 }
1302 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1303 __func__, count, edge_port->txCredits, fifo->count);
1304
1305 exit_send:
1306 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1307 }
1308
1309
1310 /*****************************************************************************
1311 * edge_write_room
1312 * this function is called by the tty driver when it wants to know how
1313 * many bytes of data we can accept for a specific port. If successful,
1314 * we return the amount of room that we have for this port (the txCredits)
1315 * otherwise we return a negative error number.
1316 *****************************************************************************/
1317 static int edge_write_room(struct tty_struct *tty)
1318 {
1319 struct usb_serial_port *port = tty->driver_data;
1320 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1321 int room;
1322 unsigned long flags;
1323
1324 if (edge_port == NULL)
1325 return 0;
1326 if (edge_port->closePending)
1327 return 0;
1328
1329 if (!edge_port->open) {
1330 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1331 return 0;
1332 }
1333
1334 /* total of both buffers is still txCredit */
1335 spin_lock_irqsave(&edge_port->ep_lock, flags);
1336 room = edge_port->txCredits - edge_port->txfifo.count;
1337 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1338
1339 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1340 return room;
1341 }
1342
1343
1344 /*****************************************************************************
1345 * edge_chars_in_buffer
1346 * this function is called by the tty driver when it wants to know how
1347 * many bytes of data we currently have outstanding in the port (data that
1348 * has been written, but hasn't made it out the port yet)
1349 * If successful, we return the number of bytes left to be written in the
1350 * system,
1351 * Otherwise we return a negative error number.
1352 *****************************************************************************/
1353 static int edge_chars_in_buffer(struct tty_struct *tty)
1354 {
1355 struct usb_serial_port *port = tty->driver_data;
1356 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1357 int num_chars;
1358 unsigned long flags;
1359
1360 if (edge_port == NULL)
1361 return 0;
1362 if (edge_port->closePending)
1363 return 0;
1364
1365 if (!edge_port->open) {
1366 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1367 return 0;
1368 }
1369
1370 spin_lock_irqsave(&edge_port->ep_lock, flags);
1371 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1372 edge_port->txfifo.count;
1373 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1374 if (num_chars) {
1375 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1376 }
1377
1378 return num_chars;
1379 }
1380
1381
1382 /*****************************************************************************
1383 * SerialThrottle
1384 * this function is called by the tty driver when it wants to stop the data
1385 * being read from the port.
1386 *****************************************************************************/
1387 static void edge_throttle(struct tty_struct *tty)
1388 {
1389 struct usb_serial_port *port = tty->driver_data;
1390 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1391 int status;
1392
1393 if (edge_port == NULL)
1394 return;
1395
1396 if (!edge_port->open) {
1397 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1398 return;
1399 }
1400
1401 /* if we are implementing XON/XOFF, send the stop character */
1402 if (I_IXOFF(tty)) {
1403 unsigned char stop_char = STOP_CHAR(tty);
1404 status = edge_write(tty, port, &stop_char, 1);
1405 if (status <= 0)
1406 return;
1407 }
1408
1409 /* if we are implementing RTS/CTS, toggle that line */
1410 if (tty->termios.c_cflag & CRTSCTS) {
1411 edge_port->shadowMCR &= ~MCR_RTS;
1412 status = send_cmd_write_uart_register(edge_port, MCR,
1413 edge_port->shadowMCR);
1414 if (status != 0)
1415 return;
1416 }
1417 }
1418
1419
1420 /*****************************************************************************
1421 * edge_unthrottle
1422 * this function is called by the tty driver when it wants to resume the
1423 * data being read from the port (called after SerialThrottle is called)
1424 *****************************************************************************/
1425 static void edge_unthrottle(struct tty_struct *tty)
1426 {
1427 struct usb_serial_port *port = tty->driver_data;
1428 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1429 int status;
1430
1431 if (edge_port == NULL)
1432 return;
1433
1434 if (!edge_port->open) {
1435 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1436 return;
1437 }
1438
1439 /* if we are implementing XON/XOFF, send the start character */
1440 if (I_IXOFF(tty)) {
1441 unsigned char start_char = START_CHAR(tty);
1442 status = edge_write(tty, port, &start_char, 1);
1443 if (status <= 0)
1444 return;
1445 }
1446 /* if we are implementing RTS/CTS, toggle that line */
1447 if (tty->termios.c_cflag & CRTSCTS) {
1448 edge_port->shadowMCR |= MCR_RTS;
1449 send_cmd_write_uart_register(edge_port, MCR,
1450 edge_port->shadowMCR);
1451 }
1452 }
1453
1454
1455 /*****************************************************************************
1456 * SerialSetTermios
1457 * this function is called by the tty driver when it wants to change
1458 * the termios structure
1459 *****************************************************************************/
1460 static void edge_set_termios(struct tty_struct *tty,
1461 struct usb_serial_port *port, struct ktermios *old_termios)
1462 {
1463 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1464 unsigned int cflag;
1465
1466 cflag = tty->termios.c_cflag;
1467 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1468 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1469
1470 if (edge_port == NULL)
1471 return;
1472
1473 if (!edge_port->open) {
1474 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1475 return;
1476 }
1477
1478 /* change the port settings to the new ones specified */
1479 change_port_settings(tty, edge_port, old_termios);
1480 }
1481
1482
1483 /*****************************************************************************
1484 * get_lsr_info - get line status register info
1485 *
1486 * Purpose: Let user call ioctl() to get info when the UART physically
1487 * is emptied. On bus types like RS485, the transmitter must
1488 * release the bus after transmitting. This must be done when
1489 * the transmit shift register is empty, not be done when the
1490 * transmit holding register is empty. This functionality
1491 * allows an RS485 driver to be written in user space.
1492 *****************************************************************************/
1493 static int get_lsr_info(struct edgeport_port *edge_port,
1494 unsigned int __user *value)
1495 {
1496 unsigned int result = 0;
1497 unsigned long flags;
1498
1499 spin_lock_irqsave(&edge_port->ep_lock, flags);
1500 if (edge_port->maxTxCredits == edge_port->txCredits &&
1501 edge_port->txfifo.count == 0) {
1502 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1503 result = TIOCSER_TEMT;
1504 }
1505 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1506
1507 if (copy_to_user(value, &result, sizeof(int)))
1508 return -EFAULT;
1509 return 0;
1510 }
1511
1512 static int edge_tiocmset(struct tty_struct *tty,
1513 unsigned int set, unsigned int clear)
1514 {
1515 struct usb_serial_port *port = tty->driver_data;
1516 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1517 unsigned int mcr;
1518
1519 mcr = edge_port->shadowMCR;
1520 if (set & TIOCM_RTS)
1521 mcr |= MCR_RTS;
1522 if (set & TIOCM_DTR)
1523 mcr |= MCR_DTR;
1524 if (set & TIOCM_LOOP)
1525 mcr |= MCR_LOOPBACK;
1526
1527 if (clear & TIOCM_RTS)
1528 mcr &= ~MCR_RTS;
1529 if (clear & TIOCM_DTR)
1530 mcr &= ~MCR_DTR;
1531 if (clear & TIOCM_LOOP)
1532 mcr &= ~MCR_LOOPBACK;
1533
1534 edge_port->shadowMCR = mcr;
1535
1536 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1537
1538 return 0;
1539 }
1540
1541 static int edge_tiocmget(struct tty_struct *tty)
1542 {
1543 struct usb_serial_port *port = tty->driver_data;
1544 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1545 unsigned int result = 0;
1546 unsigned int msr;
1547 unsigned int mcr;
1548
1549 msr = edge_port->shadowMSR;
1550 mcr = edge_port->shadowMCR;
1551 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1552 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1553 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1554 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1555 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1556 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1557
1558 return result;
1559 }
1560
1561 static int get_serial_info(struct edgeport_port *edge_port,
1562 struct serial_struct __user *retinfo)
1563 {
1564 struct serial_struct tmp;
1565
1566 if (!retinfo)
1567 return -EFAULT;
1568
1569 memset(&tmp, 0, sizeof(tmp));
1570
1571 tmp.type = PORT_16550A;
1572 tmp.line = edge_port->port->minor;
1573 tmp.port = edge_port->port->port_number;
1574 tmp.irq = 0;
1575 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1576 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1577 tmp.baud_base = 9600;
1578 tmp.close_delay = 5*HZ;
1579 tmp.closing_wait = 30*HZ;
1580
1581 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1582 return -EFAULT;
1583 return 0;
1584 }
1585
1586
1587 /*****************************************************************************
1588 * SerialIoctl
1589 * this function handles any ioctl calls to the driver
1590 *****************************************************************************/
1591 static int edge_ioctl(struct tty_struct *tty,
1592 unsigned int cmd, unsigned long arg)
1593 {
1594 struct usb_serial_port *port = tty->driver_data;
1595 DEFINE_WAIT(wait);
1596 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1597
1598 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
1599
1600 switch (cmd) {
1601 case TIOCSERGETLSR:
1602 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1603 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1604
1605 case TIOCGSERIAL:
1606 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1607 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1608 }
1609 return -ENOIOCTLCMD;
1610 }
1611
1612
1613 /*****************************************************************************
1614 * SerialBreak
1615 * this function sends a break to the port
1616 *****************************************************************************/
1617 static void edge_break(struct tty_struct *tty, int break_state)
1618 {
1619 struct usb_serial_port *port = tty->driver_data;
1620 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1621 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1622 int status;
1623
1624 if ((!edge_serial->is_epic) ||
1625 ((edge_serial->is_epic) &&
1626 (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1627 /* flush and chase */
1628 edge_port->chaseResponsePending = true;
1629
1630 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1631 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1632 if (status == 0) {
1633 /* block until chase finished */
1634 block_until_chase_response(edge_port);
1635 } else {
1636 edge_port->chaseResponsePending = false;
1637 }
1638 }
1639
1640 if ((!edge_serial->is_epic) ||
1641 ((edge_serial->is_epic) &&
1642 (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1643 if (break_state == -1) {
1644 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1645 status = send_iosp_ext_cmd(edge_port,
1646 IOSP_CMD_SET_BREAK, 0);
1647 } else {
1648 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1649 status = send_iosp_ext_cmd(edge_port,
1650 IOSP_CMD_CLEAR_BREAK, 0);
1651 }
1652 if (status)
1653 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1654 __func__);
1655 }
1656 }
1657
1658
1659 /*****************************************************************************
1660 * process_rcvd_data
1661 * this function handles the data received on the bulk in pipe.
1662 *****************************************************************************/
1663 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1664 unsigned char *buffer, __u16 bufferLength)
1665 {
1666 struct device *dev = &edge_serial->serial->dev->dev;
1667 struct usb_serial_port *port;
1668 struct edgeport_port *edge_port;
1669 __u16 lastBufferLength;
1670 __u16 rxLen;
1671
1672 lastBufferLength = bufferLength + 1;
1673
1674 while (bufferLength > 0) {
1675 /* failsafe incase we get a message that we don't understand */
1676 if (lastBufferLength == bufferLength) {
1677 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1678 break;
1679 }
1680 lastBufferLength = bufferLength;
1681
1682 switch (edge_serial->rxState) {
1683 case EXPECT_HDR1:
1684 edge_serial->rxHeader1 = *buffer;
1685 ++buffer;
1686 --bufferLength;
1687
1688 if (bufferLength == 0) {
1689 edge_serial->rxState = EXPECT_HDR2;
1690 break;
1691 }
1692 /* otherwise, drop on through */
1693 case EXPECT_HDR2:
1694 edge_serial->rxHeader2 = *buffer;
1695 ++buffer;
1696 --bufferLength;
1697
1698 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1699 edge_serial->rxHeader1, edge_serial->rxHeader2);
1700 /* Process depending on whether this header is
1701 * data or status */
1702
1703 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1704 /* Decode this status header and go to
1705 * EXPECT_HDR1 (if we can process the status
1706 * with only 2 bytes), or go to EXPECT_HDR3 to
1707 * get the third byte. */
1708 edge_serial->rxPort =
1709 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1710 edge_serial->rxStatusCode =
1711 IOSP_GET_STATUS_CODE(
1712 edge_serial->rxHeader1);
1713
1714 if (!IOSP_STATUS_IS_2BYTE(
1715 edge_serial->rxStatusCode)) {
1716 /* This status needs additional bytes.
1717 * Save what we have and then wait for
1718 * more data.
1719 */
1720 edge_serial->rxStatusParam
1721 = edge_serial->rxHeader2;
1722 edge_serial->rxState = EXPECT_HDR3;
1723 break;
1724 }
1725 /* We have all the header bytes, process the
1726 status now */
1727 process_rcvd_status(edge_serial,
1728 edge_serial->rxHeader2, 0);
1729 edge_serial->rxState = EXPECT_HDR1;
1730 break;
1731 } else {
1732 edge_serial->rxPort =
1733 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1734 edge_serial->rxBytesRemaining =
1735 IOSP_GET_HDR_DATA_LEN(
1736 edge_serial->rxHeader1,
1737 edge_serial->rxHeader2);
1738 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1739 __func__,
1740 edge_serial->rxPort,
1741 edge_serial->rxBytesRemaining);
1742
1743 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1744 * ASSERT(DevExt->RxBytesRemaining <
1745 * IOSP_MAX_DATA_LENGTH);
1746 */
1747
1748 if (bufferLength == 0) {
1749 edge_serial->rxState = EXPECT_DATA;
1750 break;
1751 }
1752 /* Else, drop through */
1753 }
1754 case EXPECT_DATA: /* Expect data */
1755 if (bufferLength < edge_serial->rxBytesRemaining) {
1756 rxLen = bufferLength;
1757 /* Expect data to start next buffer */
1758 edge_serial->rxState = EXPECT_DATA;
1759 } else {
1760 /* BufLen >= RxBytesRemaining */
1761 rxLen = edge_serial->rxBytesRemaining;
1762 /* Start another header next time */
1763 edge_serial->rxState = EXPECT_HDR1;
1764 }
1765
1766 bufferLength -= rxLen;
1767 edge_serial->rxBytesRemaining -= rxLen;
1768
1769 /* spit this data back into the tty driver if this
1770 port is open */
1771 if (rxLen) {
1772 port = edge_serial->serial->port[
1773 edge_serial->rxPort];
1774 edge_port = usb_get_serial_port_data(port);
1775 if (edge_port->open) {
1776 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1777 __func__, rxLen,
1778 edge_serial->rxPort);
1779 edge_tty_recv(edge_port->port, buffer,
1780 rxLen);
1781 edge_port->port->icount.rx += rxLen;
1782 }
1783 buffer += rxLen;
1784 }
1785 break;
1786
1787 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1788 edge_serial->rxHeader3 = *buffer;
1789 ++buffer;
1790 --bufferLength;
1791
1792 /* We have all the header bytes, process the
1793 status now */
1794 process_rcvd_status(edge_serial,
1795 edge_serial->rxStatusParam,
1796 edge_serial->rxHeader3);
1797 edge_serial->rxState = EXPECT_HDR1;
1798 break;
1799 }
1800 }
1801 }
1802
1803
1804 /*****************************************************************************
1805 * process_rcvd_status
1806 * this function handles the any status messages received on the
1807 * bulk in pipe.
1808 *****************************************************************************/
1809 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1810 __u8 byte2, __u8 byte3)
1811 {
1812 struct usb_serial_port *port;
1813 struct edgeport_port *edge_port;
1814 struct tty_struct *tty;
1815 struct device *dev;
1816 __u8 code = edge_serial->rxStatusCode;
1817
1818 /* switch the port pointer to the one being currently talked about */
1819 port = edge_serial->serial->port[edge_serial->rxPort];
1820 edge_port = usb_get_serial_port_data(port);
1821 if (edge_port == NULL) {
1822 dev_err(&edge_serial->serial->dev->dev,
1823 "%s - edge_port == NULL for port %d\n",
1824 __func__, edge_serial->rxPort);
1825 return;
1826 }
1827 dev = &port->dev;
1828
1829 if (code == IOSP_EXT_STATUS) {
1830 switch (byte2) {
1831 case IOSP_EXT_STATUS_CHASE_RSP:
1832 /* we want to do EXT status regardless of port
1833 * open/closed */
1834 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1835 __func__, edge_serial->rxPort, byte3);
1836 /* Currently, the only EXT_STATUS is Chase, so process
1837 * here instead of one more call to one more subroutine
1838 * If/when more EXT_STATUS, there'll be more work to do
1839 * Also, we currently clear flag and close the port
1840 * regardless of content of above's Byte3.
1841 * We could choose to do something else when Byte3 says
1842 * Timeout on Chase from Edgeport, like wait longer in
1843 * block_until_chase_response, but for now we don't.
1844 */
1845 edge_port->chaseResponsePending = false;
1846 wake_up(&edge_port->wait_chase);
1847 return;
1848
1849 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1850 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1851 __func__, edge_serial->rxPort, byte3);
1852 /* Port->RxCheckRsp = true; */
1853 return;
1854 }
1855 }
1856
1857 if (code == IOSP_STATUS_OPEN_RSP) {
1858 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1859 edge_port->maxTxCredits = edge_port->txCredits;
1860 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1861 __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1862 handle_new_msr(edge_port, byte2);
1863
1864 /* send the current line settings to the port so we are
1865 in sync with any further termios calls */
1866 tty = tty_port_tty_get(&edge_port->port->port);
1867 if (tty) {
1868 change_port_settings(tty,
1869 edge_port, &tty->termios);
1870 tty_kref_put(tty);
1871 }
1872
1873 /* we have completed the open */
1874 edge_port->openPending = false;
1875 edge_port->open = true;
1876 wake_up(&edge_port->wait_open);
1877 return;
1878 }
1879
1880 /* If port is closed, silently discard all rcvd status. We can
1881 * have cases where buffered status is received AFTER the close
1882 * port command is sent to the Edgeport.
1883 */
1884 if (!edge_port->open || edge_port->closePending)
1885 return;
1886
1887 switch (code) {
1888 /* Not currently sent by Edgeport */
1889 case IOSP_STATUS_LSR:
1890 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1891 __func__, edge_serial->rxPort, byte2);
1892 handle_new_lsr(edge_port, false, byte2, 0);
1893 break;
1894
1895 case IOSP_STATUS_LSR_DATA:
1896 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1897 __func__, edge_serial->rxPort, byte2, byte3);
1898 /* byte2 is LSR Register */
1899 /* byte3 is broken data byte */
1900 handle_new_lsr(edge_port, true, byte2, byte3);
1901 break;
1902 /*
1903 * case IOSP_EXT_4_STATUS:
1904 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1905 * __func__, edge_serial->rxPort, byte2, byte3);
1906 * break;
1907 */
1908 case IOSP_STATUS_MSR:
1909 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1910 __func__, edge_serial->rxPort, byte2);
1911 /*
1912 * Process this new modem status and generate appropriate
1913 * events, etc, based on the new status. This routine
1914 * also saves the MSR in Port->ShadowMsr.
1915 */
1916 handle_new_msr(edge_port, byte2);
1917 break;
1918
1919 default:
1920 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1921 break;
1922 }
1923 }
1924
1925
1926 /*****************************************************************************
1927 * edge_tty_recv
1928 * this function passes data on to the tty flip buffer
1929 *****************************************************************************/
1930 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1931 int length)
1932 {
1933 int cnt;
1934
1935 cnt = tty_insert_flip_string(&port->port, data, length);
1936 if (cnt < length) {
1937 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1938 __func__, length - cnt);
1939 }
1940 data += cnt;
1941 length -= cnt;
1942
1943 tty_flip_buffer_push(&port->port);
1944 }
1945
1946
1947 /*****************************************************************************
1948 * handle_new_msr
1949 * this function handles any change to the msr register for a port.
1950 *****************************************************************************/
1951 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1952 {
1953 struct async_icount *icount;
1954
1955 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1956 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1957 icount = &edge_port->port->icount;
1958
1959 /* update input line counters */
1960 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1961 icount->cts++;
1962 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1963 icount->dsr++;
1964 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1965 icount->dcd++;
1966 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1967 icount->rng++;
1968 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1969 }
1970
1971 /* Save the new modem status */
1972 edge_port->shadowMSR = newMsr & 0xf0;
1973 }
1974
1975
1976 /*****************************************************************************
1977 * handle_new_lsr
1978 * this function handles any change to the lsr register for a port.
1979 *****************************************************************************/
1980 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1981 __u8 lsr, __u8 data)
1982 {
1983 __u8 newLsr = (__u8) (lsr & (__u8)
1984 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1985 struct async_icount *icount;
1986
1987 edge_port->shadowLSR = lsr;
1988
1989 if (newLsr & LSR_BREAK) {
1990 /*
1991 * Parity and Framing errors only count if they
1992 * occur exclusive of a break being
1993 * received.
1994 */
1995 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1996 }
1997
1998 /* Place LSR data byte into Rx buffer */
1999 if (lsrData)
2000 edge_tty_recv(edge_port->port, &data, 1);
2001
2002 /* update input line counters */
2003 icount = &edge_port->port->icount;
2004 if (newLsr & LSR_BREAK)
2005 icount->brk++;
2006 if (newLsr & LSR_OVER_ERR)
2007 icount->overrun++;
2008 if (newLsr & LSR_PAR_ERR)
2009 icount->parity++;
2010 if (newLsr & LSR_FRM_ERR)
2011 icount->frame++;
2012 }
2013
2014
2015 /****************************************************************************
2016 * sram_write
2017 * writes a number of bytes to the Edgeport device's sram starting at the
2018 * given address.
2019 * If successful returns the number of bytes written, otherwise it returns
2020 * a negative error number of the problem.
2021 ****************************************************************************/
2022 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2023 __u16 length, const __u8 *data)
2024 {
2025 int result;
2026 __u16 current_length;
2027 unsigned char *transfer_buffer;
2028
2029 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2030
2031 transfer_buffer = kmalloc(64, GFP_KERNEL);
2032 if (!transfer_buffer) {
2033 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2034 __func__, 64);
2035 return -ENOMEM;
2036 }
2037
2038 /* need to split these writes up into 64 byte chunks */
2039 result = 0;
2040 while (length > 0) {
2041 if (length > 64)
2042 current_length = 64;
2043 else
2044 current_length = length;
2045
2046 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2047 memcpy(transfer_buffer, data, current_length);
2048 result = usb_control_msg(serial->dev,
2049 usb_sndctrlpipe(serial->dev, 0),
2050 USB_REQUEST_ION_WRITE_RAM,
2051 0x40, addr, extAddr, transfer_buffer,
2052 current_length, 300);
2053 if (result < 0)
2054 break;
2055 length -= current_length;
2056 addr += current_length;
2057 data += current_length;
2058 }
2059
2060 kfree(transfer_buffer);
2061 return result;
2062 }
2063
2064
2065 /****************************************************************************
2066 * rom_write
2067 * writes a number of bytes to the Edgeport device's ROM starting at the
2068 * given address.
2069 * If successful returns the number of bytes written, otherwise it returns
2070 * a negative error number of the problem.
2071 ****************************************************************************/
2072 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2073 __u16 length, const __u8 *data)
2074 {
2075 int result;
2076 __u16 current_length;
2077 unsigned char *transfer_buffer;
2078
2079 transfer_buffer = kmalloc(64, GFP_KERNEL);
2080 if (!transfer_buffer) {
2081 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2082 __func__, 64);
2083 return -ENOMEM;
2084 }
2085
2086 /* need to split these writes up into 64 byte chunks */
2087 result = 0;
2088 while (length > 0) {
2089 if (length > 64)
2090 current_length = 64;
2091 else
2092 current_length = length;
2093 memcpy(transfer_buffer, data, current_length);
2094 result = usb_control_msg(serial->dev,
2095 usb_sndctrlpipe(serial->dev, 0),
2096 USB_REQUEST_ION_WRITE_ROM, 0x40,
2097 addr, extAddr,
2098 transfer_buffer, current_length, 300);
2099 if (result < 0)
2100 break;
2101 length -= current_length;
2102 addr += current_length;
2103 data += current_length;
2104 }
2105
2106 kfree(transfer_buffer);
2107 return result;
2108 }
2109
2110
2111 /****************************************************************************
2112 * rom_read
2113 * reads a number of bytes from the Edgeport device starting at the given
2114 * address.
2115 * If successful returns the number of bytes read, otherwise it returns
2116 * a negative error number of the problem.
2117 ****************************************************************************/
2118 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2119 __u16 addr, __u16 length, __u8 *data)
2120 {
2121 int result;
2122 __u16 current_length;
2123 unsigned char *transfer_buffer;
2124
2125 transfer_buffer = kmalloc(64, GFP_KERNEL);
2126 if (!transfer_buffer) {
2127 dev_err(&serial->dev->dev,
2128 "%s - kmalloc(%d) failed.\n", __func__, 64);
2129 return -ENOMEM;
2130 }
2131
2132 /* need to split these reads up into 64 byte chunks */
2133 result = 0;
2134 while (length > 0) {
2135 if (length > 64)
2136 current_length = 64;
2137 else
2138 current_length = length;
2139 result = usb_control_msg(serial->dev,
2140 usb_rcvctrlpipe(serial->dev, 0),
2141 USB_REQUEST_ION_READ_ROM,
2142 0xC0, addr, extAddr, transfer_buffer,
2143 current_length, 300);
2144 if (result < 0)
2145 break;
2146 memcpy(data, transfer_buffer, current_length);
2147 length -= current_length;
2148 addr += current_length;
2149 data += current_length;
2150 }
2151
2152 kfree(transfer_buffer);
2153 return result;
2154 }
2155
2156
2157 /****************************************************************************
2158 * send_iosp_ext_cmd
2159 * Is used to send a IOSP message to the Edgeport device
2160 ****************************************************************************/
2161 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2162 __u8 command, __u8 param)
2163 {
2164 unsigned char *buffer;
2165 unsigned char *currentCommand;
2166 int length = 0;
2167 int status = 0;
2168
2169 buffer = kmalloc(10, GFP_ATOMIC);
2170 if (!buffer) {
2171 dev_err(&edge_port->port->dev,
2172 "%s - kmalloc(%d) failed.\n", __func__, 10);
2173 return -ENOMEM;
2174 }
2175
2176 currentCommand = buffer;
2177
2178 MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2179 command, param);
2180
2181 status = write_cmd_usb(edge_port, buffer, length);
2182 if (status) {
2183 /* something bad happened, let's free up the memory */
2184 kfree(buffer);
2185 }
2186
2187 return status;
2188 }
2189
2190
2191 /*****************************************************************************
2192 * write_cmd_usb
2193 * this function writes the given buffer out to the bulk write endpoint.
2194 *****************************************************************************/
2195 static int write_cmd_usb(struct edgeport_port *edge_port,
2196 unsigned char *buffer, int length)
2197 {
2198 struct edgeport_serial *edge_serial =
2199 usb_get_serial_data(edge_port->port->serial);
2200 struct device *dev = &edge_port->port->dev;
2201 int status = 0;
2202 struct urb *urb;
2203
2204 usb_serial_debug_data(dev, __func__, length, buffer);
2205
2206 /* Allocate our next urb */
2207 urb = usb_alloc_urb(0, GFP_ATOMIC);
2208 if (!urb)
2209 return -ENOMEM;
2210
2211 atomic_inc(&CmdUrbs);
2212 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2213 __func__, urb, atomic_read(&CmdUrbs));
2214
2215 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2216 usb_sndbulkpipe(edge_serial->serial->dev,
2217 edge_serial->bulk_out_endpoint),
2218 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2219
2220 edge_port->commandPending = true;
2221 status = usb_submit_urb(urb, GFP_ATOMIC);
2222
2223 if (status) {
2224 /* something went wrong */
2225 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2226 __func__, status);
2227 usb_kill_urb(urb);
2228 usb_free_urb(urb);
2229 atomic_dec(&CmdUrbs);
2230 return status;
2231 }
2232
2233 #if 0
2234 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2235
2236 if (edge_port->commandPending) {
2237 /* command timed out */
2238 dev_dbg(dev, "%s - command timed out\n", __func__);
2239 status = -EINVAL;
2240 }
2241 #endif
2242 return status;
2243 }
2244
2245
2246 /*****************************************************************************
2247 * send_cmd_write_baud_rate
2248 * this function sends the proper command to change the baud rate of the
2249 * specified port.
2250 *****************************************************************************/
2251 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2252 int baudRate)
2253 {
2254 struct edgeport_serial *edge_serial =
2255 usb_get_serial_data(edge_port->port->serial);
2256 struct device *dev = &edge_port->port->dev;
2257 unsigned char *cmdBuffer;
2258 unsigned char *currCmd;
2259 int cmdLen = 0;
2260 int divisor;
2261 int status;
2262 u32 number = edge_port->port->port_number;
2263
2264 if (edge_serial->is_epic &&
2265 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2266 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2267 baudRate);
2268 return 0;
2269 }
2270
2271 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2272
2273 status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2274 if (status) {
2275 dev_err(dev, "%s - bad baud rate\n", __func__);
2276 return status;
2277 }
2278
2279 /* Alloc memory for the string of commands. */
2280 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2281 if (!cmdBuffer) {
2282 dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2283 return -ENOMEM;
2284 }
2285 currCmd = cmdBuffer;
2286
2287 /* Enable access to divisor latch */
2288 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2289
2290 /* Write the divisor itself */
2291 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2292 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2293
2294 /* Restore original value to disable access to divisor latch */
2295 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2296 edge_port->shadowLCR);
2297
2298 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2299 if (status) {
2300 /* something bad happened, let's free up the memory */
2301 kfree(cmdBuffer);
2302 }
2303
2304 return status;
2305 }
2306
2307
2308 /*****************************************************************************
2309 * calc_baud_rate_divisor
2310 * this function calculates the proper baud rate divisor for the specified
2311 * baud rate.
2312 *****************************************************************************/
2313 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2314 {
2315 int i;
2316 __u16 custom;
2317
2318 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2319 if (divisor_table[i].BaudRate == baudrate) {
2320 *divisor = divisor_table[i].Divisor;
2321 return 0;
2322 }
2323 }
2324
2325 /* We have tried all of the standard baud rates
2326 * lets try to calculate the divisor for this baud rate
2327 * Make sure the baud rate is reasonable */
2328 if (baudrate > 50 && baudrate < 230400) {
2329 /* get divisor */
2330 custom = (__u16)((230400L + baudrate/2) / baudrate);
2331
2332 *divisor = custom;
2333
2334 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2335 return 0;
2336 }
2337
2338 return -1;
2339 }
2340
2341
2342 /*****************************************************************************
2343 * send_cmd_write_uart_register
2344 * this function builds up a uart register message and sends to the device.
2345 *****************************************************************************/
2346 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2347 __u8 regNum, __u8 regValue)
2348 {
2349 struct edgeport_serial *edge_serial =
2350 usb_get_serial_data(edge_port->port->serial);
2351 struct device *dev = &edge_port->port->dev;
2352 unsigned char *cmdBuffer;
2353 unsigned char *currCmd;
2354 unsigned long cmdLen = 0;
2355 int status;
2356
2357 dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2358 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2359
2360 if (edge_serial->is_epic &&
2361 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2362 regNum == MCR) {
2363 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2364 return 0;
2365 }
2366
2367 if (edge_serial->is_epic &&
2368 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2369 regNum == LCR) {
2370 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2371 return 0;
2372 }
2373
2374 /* Alloc memory for the string of commands. */
2375 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2376 if (cmdBuffer == NULL)
2377 return -ENOMEM;
2378
2379 currCmd = cmdBuffer;
2380
2381 /* Build a cmd in the buffer to write the given register */
2382 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2383 regNum, regValue);
2384
2385 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2386 if (status) {
2387 /* something bad happened, let's free up the memory */
2388 kfree(cmdBuffer);
2389 }
2390
2391 return status;
2392 }
2393
2394
2395 /*****************************************************************************
2396 * change_port_settings
2397 * This routine is called to set the UART on the device to match the
2398 * specified new settings.
2399 *****************************************************************************/
2400
2401 static void change_port_settings(struct tty_struct *tty,
2402 struct edgeport_port *edge_port, struct ktermios *old_termios)
2403 {
2404 struct device *dev = &edge_port->port->dev;
2405 struct edgeport_serial *edge_serial =
2406 usb_get_serial_data(edge_port->port->serial);
2407 int baud;
2408 unsigned cflag;
2409 __u8 mask = 0xff;
2410 __u8 lData;
2411 __u8 lParity;
2412 __u8 lStop;
2413 __u8 rxFlow;
2414 __u8 txFlow;
2415 int status;
2416
2417 if (!edge_port->open &&
2418 !edge_port->openPending) {
2419 dev_dbg(dev, "%s - port not opened\n", __func__);
2420 return;
2421 }
2422
2423 cflag = tty->termios.c_cflag;
2424
2425 switch (cflag & CSIZE) {
2426 case CS5:
2427 lData = LCR_BITS_5; mask = 0x1f;
2428 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2429 break;
2430 case CS6:
2431 lData = LCR_BITS_6; mask = 0x3f;
2432 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2433 break;
2434 case CS7:
2435 lData = LCR_BITS_7; mask = 0x7f;
2436 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2437 break;
2438 default:
2439 case CS8:
2440 lData = LCR_BITS_8;
2441 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2442 break;
2443 }
2444
2445 lParity = LCR_PAR_NONE;
2446 if (cflag & PARENB) {
2447 if (cflag & CMSPAR) {
2448 if (cflag & PARODD) {
2449 lParity = LCR_PAR_MARK;
2450 dev_dbg(dev, "%s - parity = mark\n", __func__);
2451 } else {
2452 lParity = LCR_PAR_SPACE;
2453 dev_dbg(dev, "%s - parity = space\n", __func__);
2454 }
2455 } else if (cflag & PARODD) {
2456 lParity = LCR_PAR_ODD;
2457 dev_dbg(dev, "%s - parity = odd\n", __func__);
2458 } else {
2459 lParity = LCR_PAR_EVEN;
2460 dev_dbg(dev, "%s - parity = even\n", __func__);
2461 }
2462 } else {
2463 dev_dbg(dev, "%s - parity = none\n", __func__);
2464 }
2465
2466 if (cflag & CSTOPB) {
2467 lStop = LCR_STOP_2;
2468 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2469 } else {
2470 lStop = LCR_STOP_1;
2471 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2472 }
2473
2474 /* figure out the flow control settings */
2475 rxFlow = txFlow = 0x00;
2476 if (cflag & CRTSCTS) {
2477 rxFlow |= IOSP_RX_FLOW_RTS;
2478 txFlow |= IOSP_TX_FLOW_CTS;
2479 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2480 } else {
2481 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2482 }
2483
2484 /* if we are implementing XON/XOFF, set the start and stop character
2485 in the device */
2486 if (I_IXOFF(tty) || I_IXON(tty)) {
2487 unsigned char stop_char = STOP_CHAR(tty);
2488 unsigned char start_char = START_CHAR(tty);
2489
2490 if ((!edge_serial->is_epic) ||
2491 ((edge_serial->is_epic) &&
2492 (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2493 send_iosp_ext_cmd(edge_port,
2494 IOSP_CMD_SET_XON_CHAR, start_char);
2495 send_iosp_ext_cmd(edge_port,
2496 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2497 }
2498
2499 /* if we are implementing INBOUND XON/XOFF */
2500 if (I_IXOFF(tty)) {
2501 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2502 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2503 __func__, start_char, stop_char);
2504 } else {
2505 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2506 }
2507
2508 /* if we are implementing OUTBOUND XON/XOFF */
2509 if (I_IXON(tty)) {
2510 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2511 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2512 __func__, start_char, stop_char);
2513 } else {
2514 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2515 }
2516 }
2517
2518 /* Set flow control to the configured value */
2519 if ((!edge_serial->is_epic) ||
2520 ((edge_serial->is_epic) &&
2521 (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2522 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2523 if ((!edge_serial->is_epic) ||
2524 ((edge_serial->is_epic) &&
2525 (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2526 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2527
2528
2529 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2530 edge_port->shadowLCR |= (lData | lParity | lStop);
2531
2532 edge_port->validDataMask = mask;
2533
2534 /* Send the updated LCR value to the EdgePort */
2535 status = send_cmd_write_uart_register(edge_port, LCR,
2536 edge_port->shadowLCR);
2537 if (status != 0)
2538 return;
2539
2540 /* set up the MCR register and send it to the EdgePort */
2541 edge_port->shadowMCR = MCR_MASTER_IE;
2542 if (cflag & CBAUD)
2543 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2544
2545 status = send_cmd_write_uart_register(edge_port, MCR,
2546 edge_port->shadowMCR);
2547 if (status != 0)
2548 return;
2549
2550 /* Determine divisor based on baud rate */
2551 baud = tty_get_baud_rate(tty);
2552 if (!baud) {
2553 /* pick a default, any default... */
2554 baud = 9600;
2555 }
2556
2557 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2558 status = send_cmd_write_baud_rate(edge_port, baud);
2559 if (status == -1) {
2560 /* Speed change was not possible - put back the old speed */
2561 baud = tty_termios_baud_rate(old_termios);
2562 tty_encode_baud_rate(tty, baud, baud);
2563 }
2564 }
2565
2566
2567 /****************************************************************************
2568 * unicode_to_ascii
2569 * Turns a string from Unicode into ASCII.
2570 * Doesn't do a good job with any characters that are outside the normal
2571 * ASCII range, but it's only for debugging...
2572 * NOTE: expects the unicode in LE format
2573 ****************************************************************************/
2574 static void unicode_to_ascii(char *string, int buflen,
2575 __le16 *unicode, int unicode_size)
2576 {
2577 int i;
2578
2579 if (buflen <= 0) /* never happens, but... */
2580 return;
2581 --buflen; /* space for nul */
2582
2583 for (i = 0; i < unicode_size; i++) {
2584 if (i >= buflen)
2585 break;
2586 string[i] = (char)(le16_to_cpu(unicode[i]));
2587 }
2588 string[i] = 0x00;
2589 }
2590
2591
2592 /****************************************************************************
2593 * get_manufacturing_desc
2594 * reads in the manufacturing descriptor and stores it into the serial
2595 * structure.
2596 ****************************************************************************/
2597 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2598 {
2599 struct device *dev = &edge_serial->serial->dev->dev;
2600 int response;
2601
2602 dev_dbg(dev, "getting manufacturer descriptor\n");
2603
2604 response = rom_read(edge_serial->serial,
2605 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2606 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2607 EDGE_MANUF_DESC_LEN,
2608 (__u8 *)(&edge_serial->manuf_descriptor));
2609
2610 if (response < 1)
2611 dev_err(dev, "error in getting manufacturer descriptor\n");
2612 else {
2613 char string[30];
2614 dev_dbg(dev, "**Manufacturer Descriptor\n");
2615 dev_dbg(dev, " RomSize: %dK\n",
2616 edge_serial->manuf_descriptor.RomSize);
2617 dev_dbg(dev, " RamSize: %dK\n",
2618 edge_serial->manuf_descriptor.RamSize);
2619 dev_dbg(dev, " CpuRev: %d\n",
2620 edge_serial->manuf_descriptor.CpuRev);
2621 dev_dbg(dev, " BoardRev: %d\n",
2622 edge_serial->manuf_descriptor.BoardRev);
2623 dev_dbg(dev, " NumPorts: %d\n",
2624 edge_serial->manuf_descriptor.NumPorts);
2625 dev_dbg(dev, " DescDate: %d/%d/%d\n",
2626 edge_serial->manuf_descriptor.DescDate[0],
2627 edge_serial->manuf_descriptor.DescDate[1],
2628 edge_serial->manuf_descriptor.DescDate[2]+1900);
2629 unicode_to_ascii(string, sizeof(string),
2630 edge_serial->manuf_descriptor.SerialNumber,
2631 edge_serial->manuf_descriptor.SerNumLength/2);
2632 dev_dbg(dev, " SerialNumber: %s\n", string);
2633 unicode_to_ascii(string, sizeof(string),
2634 edge_serial->manuf_descriptor.AssemblyNumber,
2635 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2636 dev_dbg(dev, " AssemblyNumber: %s\n", string);
2637 unicode_to_ascii(string, sizeof(string),
2638 edge_serial->manuf_descriptor.OemAssyNumber,
2639 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2640 dev_dbg(dev, " OemAssyNumber: %s\n", string);
2641 dev_dbg(dev, " UartType: %d\n",
2642 edge_serial->manuf_descriptor.UartType);
2643 dev_dbg(dev, " IonPid: %d\n",
2644 edge_serial->manuf_descriptor.IonPid);
2645 dev_dbg(dev, " IonConfig: %d\n",
2646 edge_serial->manuf_descriptor.IonConfig);
2647 }
2648 }
2649
2650
2651 /****************************************************************************
2652 * get_boot_desc
2653 * reads in the bootloader descriptor and stores it into the serial
2654 * structure.
2655 ****************************************************************************/
2656 static void get_boot_desc(struct edgeport_serial *edge_serial)
2657 {
2658 struct device *dev = &edge_serial->serial->dev->dev;
2659 int response;
2660
2661 dev_dbg(dev, "getting boot descriptor\n");
2662
2663 response = rom_read(edge_serial->serial,
2664 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2665 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2666 EDGE_BOOT_DESC_LEN,
2667 (__u8 *)(&edge_serial->boot_descriptor));
2668
2669 if (response < 1)
2670 dev_err(dev, "error in getting boot descriptor\n");
2671 else {
2672 dev_dbg(dev, "**Boot Descriptor:\n");
2673 dev_dbg(dev, " BootCodeLength: %d\n",
2674 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2675 dev_dbg(dev, " MajorVersion: %d\n",
2676 edge_serial->boot_descriptor.MajorVersion);
2677 dev_dbg(dev, " MinorVersion: %d\n",
2678 edge_serial->boot_descriptor.MinorVersion);
2679 dev_dbg(dev, " BuildNumber: %d\n",
2680 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2681 dev_dbg(dev, " Capabilities: 0x%x\n",
2682 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2683 dev_dbg(dev, " UConfig0: %d\n",
2684 edge_serial->boot_descriptor.UConfig0);
2685 dev_dbg(dev, " UConfig1: %d\n",
2686 edge_serial->boot_descriptor.UConfig1);
2687 }
2688 }
2689
2690
2691 /****************************************************************************
2692 * load_application_firmware
2693 * This is called to load the application firmware to the device
2694 ****************************************************************************/
2695 static void load_application_firmware(struct edgeport_serial *edge_serial)
2696 {
2697 struct device *dev = &edge_serial->serial->dev->dev;
2698 const struct ihex_binrec *rec;
2699 const struct firmware *fw;
2700 const char *fw_name;
2701 const char *fw_info;
2702 int response;
2703 __u32 Operaddr;
2704 __u16 build;
2705
2706 switch (edge_serial->product_info.iDownloadFile) {
2707 case EDGE_DOWNLOAD_FILE_I930:
2708 fw_info = "downloading firmware version (930)";
2709 fw_name = "edgeport/down.fw";
2710 break;
2711
2712 case EDGE_DOWNLOAD_FILE_80251:
2713 fw_info = "downloading firmware version (80251)";
2714 fw_name = "edgeport/down2.fw";
2715 break;
2716
2717 case EDGE_DOWNLOAD_FILE_NONE:
2718 dev_dbg(dev, "No download file specified, skipping download\n");
2719 return;
2720
2721 default:
2722 return;
2723 }
2724
2725 response = request_ihex_firmware(&fw, fw_name,
2726 &edge_serial->serial->dev->dev);
2727 if (response) {
2728 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2729 fw_name, response);
2730 return;
2731 }
2732
2733 rec = (const struct ihex_binrec *)fw->data;
2734 build = (rec->data[2] << 8) | rec->data[3];
2735
2736 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2737
2738 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2739 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2740 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2741
2742 for (rec = ihex_next_binrec(rec); rec;
2743 rec = ihex_next_binrec(rec)) {
2744 Operaddr = be32_to_cpu(rec->addr);
2745 response = sram_write(edge_serial->serial,
2746 Operaddr >> 16,
2747 Operaddr & 0xFFFF,
2748 be16_to_cpu(rec->len),
2749 &rec->data[0]);
2750 if (response < 0) {
2751 dev_err(&edge_serial->serial->dev->dev,
2752 "sram_write failed (%x, %x, %d)\n",
2753 Operaddr >> 16, Operaddr & 0xFFFF,
2754 be16_to_cpu(rec->len));
2755 break;
2756 }
2757 }
2758
2759 dev_dbg(dev, "sending exec_dl_code\n");
2760 response = usb_control_msg (edge_serial->serial->dev,
2761 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2762 USB_REQUEST_ION_EXEC_DL_CODE,
2763 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2764
2765 release_firmware(fw);
2766 }
2767
2768
2769 /****************************************************************************
2770 * edge_startup
2771 ****************************************************************************/
2772 static int edge_startup(struct usb_serial *serial)
2773 {
2774 struct edgeport_serial *edge_serial;
2775 struct usb_device *dev;
2776 struct device *ddev = &serial->dev->dev;
2777 int i;
2778 int response;
2779 bool interrupt_in_found;
2780 bool bulk_in_found;
2781 bool bulk_out_found;
2782 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2783 EDGE_COMPATIBILITY_MASK1,
2784 EDGE_COMPATIBILITY_MASK2 };
2785
2786 dev = serial->dev;
2787
2788 /* create our private serial structure */
2789 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2790 if (edge_serial == NULL) {
2791 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2792 return -ENOMEM;
2793 }
2794 spin_lock_init(&edge_serial->es_lock);
2795 edge_serial->serial = serial;
2796 usb_set_serial_data(serial, edge_serial);
2797
2798 /* get the name for the device from the device */
2799 i = usb_string(dev, dev->descriptor.iManufacturer,
2800 &edge_serial->name[0], MAX_NAME_LEN+1);
2801 if (i < 0)
2802 i = 0;
2803 edge_serial->name[i++] = ' ';
2804 usb_string(dev, dev->descriptor.iProduct,
2805 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2806
2807 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2808
2809 /* Read the epic descriptor */
2810 if (get_epic_descriptor(edge_serial) <= 0) {
2811 /* memcpy descriptor to Supports structures */
2812 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2813 sizeof(struct edge_compatibility_bits));
2814
2815 /* get the manufacturing descriptor for this device */
2816 get_manufacturing_desc(edge_serial);
2817
2818 /* get the boot descriptor */
2819 get_boot_desc(edge_serial);
2820
2821 get_product_info(edge_serial);
2822 }
2823
2824 /* set the number of ports from the manufacturing description */
2825 /* serial->num_ports = serial->product_info.NumPorts; */
2826 if ((!edge_serial->is_epic) &&
2827 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2828 dev_warn(ddev,
2829 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2830 edge_serial->product_info.NumPorts,
2831 serial->num_ports);
2832 }
2833
2834 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2835
2836 /* If not an EPiC device */
2837 if (!edge_serial->is_epic) {
2838 /* now load the application firmware into this device */
2839 load_application_firmware(edge_serial);
2840
2841 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2842
2843 /* Check current Edgeport EEPROM and update if necessary */
2844 update_edgeport_E2PROM(edge_serial);
2845
2846 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2847
2848 /* set the configuration to use #1 */
2849 /* dev_dbg(ddev, "set_configuration 1\n"); */
2850 /* usb_set_configuration (dev, 1); */
2851 }
2852 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n",
2853 edge_serial->product_info.FirmwareMajorVersion,
2854 edge_serial->product_info.FirmwareMinorVersion,
2855 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2856
2857 /* we set up the pointers to the endpoints in the edge_open function,
2858 * as the structures aren't created yet. */
2859
2860 response = 0;
2861
2862 if (edge_serial->is_epic) {
2863 /* EPIC thing, set up our interrupt polling now and our read
2864 * urb, so that the device knows it really is connected. */
2865 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2866 for (i = 0; i < serial->interface->altsetting[0]
2867 .desc.bNumEndpoints; ++i) {
2868 struct usb_endpoint_descriptor *endpoint;
2869 int buffer_size;
2870
2871 endpoint = &serial->interface->altsetting[0].
2872 endpoint[i].desc;
2873 buffer_size = usb_endpoint_maxp(endpoint);
2874 if (!interrupt_in_found &&
2875 (usb_endpoint_is_int_in(endpoint))) {
2876 /* we found a interrupt in endpoint */
2877 dev_dbg(ddev, "found interrupt in\n");
2878
2879 /* not set up yet, so do it now */
2880 edge_serial->interrupt_read_urb =
2881 usb_alloc_urb(0, GFP_KERNEL);
2882 if (!edge_serial->interrupt_read_urb) {
2883 dev_err(ddev, "out of memory\n");
2884 return -ENOMEM;
2885 }
2886 edge_serial->interrupt_in_buffer =
2887 kmalloc(buffer_size, GFP_KERNEL);
2888 if (!edge_serial->interrupt_in_buffer) {
2889 dev_err(ddev, "out of memory\n");
2890 usb_free_urb(edge_serial->interrupt_read_urb);
2891 return -ENOMEM;
2892 }
2893 edge_serial->interrupt_in_endpoint =
2894 endpoint->bEndpointAddress;
2895
2896 /* set up our interrupt urb */
2897 usb_fill_int_urb(
2898 edge_serial->interrupt_read_urb,
2899 dev,
2900 usb_rcvintpipe(dev,
2901 endpoint->bEndpointAddress),
2902 edge_serial->interrupt_in_buffer,
2903 buffer_size,
2904 edge_interrupt_callback,
2905 edge_serial,
2906 endpoint->bInterval);
2907
2908 interrupt_in_found = true;
2909 }
2910
2911 if (!bulk_in_found &&
2912 (usb_endpoint_is_bulk_in(endpoint))) {
2913 /* we found a bulk in endpoint */
2914 dev_dbg(ddev, "found bulk in\n");
2915
2916 /* not set up yet, so do it now */
2917 edge_serial->read_urb =
2918 usb_alloc_urb(0, GFP_KERNEL);
2919 if (!edge_serial->read_urb) {
2920 dev_err(ddev, "out of memory\n");
2921 return -ENOMEM;
2922 }
2923 edge_serial->bulk_in_buffer =
2924 kmalloc(buffer_size, GFP_KERNEL);
2925 if (!edge_serial->bulk_in_buffer) {
2926 dev_err(&dev->dev, "out of memory\n");
2927 usb_free_urb(edge_serial->read_urb);
2928 return -ENOMEM;
2929 }
2930 edge_serial->bulk_in_endpoint =
2931 endpoint->bEndpointAddress;
2932
2933 /* set up our bulk in urb */
2934 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2935 usb_rcvbulkpipe(dev,
2936 endpoint->bEndpointAddress),
2937 edge_serial->bulk_in_buffer,
2938 usb_endpoint_maxp(endpoint),
2939 edge_bulk_in_callback,
2940 edge_serial);
2941 bulk_in_found = true;
2942 }
2943
2944 if (!bulk_out_found &&
2945 (usb_endpoint_is_bulk_out(endpoint))) {
2946 /* we found a bulk out endpoint */
2947 dev_dbg(ddev, "found bulk out\n");
2948 edge_serial->bulk_out_endpoint =
2949 endpoint->bEndpointAddress;
2950 bulk_out_found = true;
2951 }
2952 }
2953
2954 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
2955 dev_err(ddev, "Error - the proper endpoints were not found!\n");
2956 return -ENODEV;
2957 }
2958
2959 /* start interrupt read for this edgeport this interrupt will
2960 * continue as long as the edgeport is connected */
2961 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2962 GFP_KERNEL);
2963 if (response)
2964 dev_err(ddev, "%s - Error %d submitting control urb\n",
2965 __func__, response);
2966 }
2967 return response;
2968 }
2969
2970
2971 /****************************************************************************
2972 * edge_disconnect
2973 * This function is called whenever the device is removed from the usb bus.
2974 ****************************************************************************/
2975 static void edge_disconnect(struct usb_serial *serial)
2976 {
2977 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2978
2979 /* stop reads and writes on all ports */
2980 /* free up our endpoint stuff */
2981 if (edge_serial->is_epic) {
2982 usb_kill_urb(edge_serial->interrupt_read_urb);
2983 usb_free_urb(edge_serial->interrupt_read_urb);
2984 kfree(edge_serial->interrupt_in_buffer);
2985
2986 usb_kill_urb(edge_serial->read_urb);
2987 usb_free_urb(edge_serial->read_urb);
2988 kfree(edge_serial->bulk_in_buffer);
2989 }
2990 }
2991
2992
2993 /****************************************************************************
2994 * edge_release
2995 * This function is called when the device structure is deallocated.
2996 ****************************************************************************/
2997 static void edge_release(struct usb_serial *serial)
2998 {
2999 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3000
3001 kfree(edge_serial);
3002 }
3003
3004 static int edge_port_probe(struct usb_serial_port *port)
3005 {
3006 struct edgeport_port *edge_port;
3007
3008 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3009 if (!edge_port)
3010 return -ENOMEM;
3011
3012 spin_lock_init(&edge_port->ep_lock);
3013 edge_port->port = port;
3014
3015 usb_set_serial_port_data(port, edge_port);
3016
3017 return 0;
3018 }
3019
3020 static int edge_port_remove(struct usb_serial_port *port)
3021 {
3022 struct edgeport_port *edge_port;
3023
3024 edge_port = usb_get_serial_port_data(port);
3025 kfree(edge_port);
3026
3027 return 0;
3028 }
3029
3030 module_usb_serial_driver(serial_drivers, id_table_combined);
3031
3032 MODULE_AUTHOR(DRIVER_AUTHOR);
3033 MODULE_DESCRIPTION(DRIVER_DESC);
3034 MODULE_LICENSE("GPL");
3035 MODULE_FIRMWARE("edgeport/boot.fw");
3036 MODULE_FIRMWARE("edgeport/boot2.fw");
3037 MODULE_FIRMWARE("edgeport/down.fw");
3038 MODULE_FIRMWARE("edgeport/down2.fw");
Linus' kernel tree