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Merge tag 'regulator-fix-v4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-artful-kernel.git] / drivers / usb / serial / io_edgeport.c
1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/slab.h>
36 #include <linux/tty.h>
37 #include <linux/tty_driver.h>
38 #include <linux/tty_flip.h>
39 #include <linux/module.h>
40 #include <linux/spinlock.h>
41 #include <linux/serial.h>
42 #include <linux/ioctl.h>
43 #include <linux/wait.h>
44 #include <linux/firmware.h>
45 #include <linux/ihex.h>
46 #include <linux/uaccess.h>
47 #include <linux/usb.h>
48 #include <linux/usb/serial.h>
49 #include "io_edgeport.h"
50 #include "io_ionsp.h" /* info for the iosp messages */
51 #include "io_16654.h" /* 16654 UART defines */
52
53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
54 #define DRIVER_DESC "Edgeport USB Serial Driver"
55
56 #define MAX_NAME_LEN 64
57
58 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
59
60 /* receive port state */
61 enum RXSTATE {
62 EXPECT_HDR1 = 0, /* Expect header byte 1 */
63 EXPECT_HDR2 = 1, /* Expect header byte 2 */
64 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
65 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
66 };
67
68
69 /* Transmit Fifo
70 * This Transmit queue is an extension of the edgeport Rx buffer.
71 * The maximum amount of data buffered in both the edgeport
72 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
73 */
74 struct TxFifo {
75 unsigned int head; /* index to head pointer (write) */
76 unsigned int tail; /* index to tail pointer (read) */
77 unsigned int count; /* Bytes in queue */
78 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
79 unsigned char *fifo; /* allocated Buffer */
80 };
81
82 /* This structure holds all of the local port information */
83 struct edgeport_port {
84 __u16 txCredits; /* our current credits for this port */
85 __u16 maxTxCredits; /* the max size of the port */
86
87 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
88 struct urb *write_urb; /* write URB for this port */
89 bool write_in_progress; /* 'true' while a write URB is outstanding */
90 spinlock_t ep_lock;
91
92 __u8 shadowLCR; /* last LCR value received */
93 __u8 shadowMCR; /* last MCR value received */
94 __u8 shadowMSR; /* last MSR value received */
95 __u8 shadowLSR; /* last LSR value received */
96 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
97 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
98 __u8 validDataMask;
99 __u32 baudRate;
100
101 bool open;
102 bool openPending;
103 bool commandPending;
104 bool closePending;
105 bool chaseResponsePending;
106
107 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
108 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
109 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
110
111 struct usb_serial_port *port; /* loop back to the owner of this object */
112 };
113
114
115 /* This structure holds all of the individual device information */
116 struct edgeport_serial {
117 char name[MAX_NAME_LEN+2]; /* string name of this device */
118
119 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
120 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
121 struct edgeport_product_info product_info; /* Product Info */
122 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
123 int is_epic; /* flag if EPiC device or not */
124
125 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
126 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
127 struct urb *interrupt_read_urb; /* our interrupt urb */
128
129 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
130 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
131 struct urb *read_urb; /* our bulk read urb */
132 bool read_in_progress;
133 spinlock_t es_lock;
134
135 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
136
137 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
138
139 enum RXSTATE rxState; /* the current state of the bulk receive processor */
140 __u8 rxHeader1; /* receive header byte 1 */
141 __u8 rxHeader2; /* receive header byte 2 */
142 __u8 rxHeader3; /* receive header byte 3 */
143 __u8 rxPort; /* the port that we are currently receiving data for */
144 __u8 rxStatusCode; /* the receive status code */
145 __u8 rxStatusParam; /* the receive status paramater */
146 __s16 rxBytesRemaining; /* the number of port bytes left to read */
147 struct usb_serial *serial; /* loop back to the owner of this object */
148 };
149
150 /* baud rate information */
151 struct divisor_table_entry {
152 __u32 BaudRate;
153 __u16 Divisor;
154 };
155
156 /*
157 * Define table of divisors for Rev A EdgePort/4 hardware
158 * These assume a 3.6864MHz crystal, the standard /16, and
159 * MCR.7 = 0.
160 */
161
162 static const struct divisor_table_entry divisor_table[] = {
163 { 50, 4608},
164 { 75, 3072},
165 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
166 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
167 { 150, 1536},
168 { 300, 768},
169 { 600, 384},
170 { 1200, 192},
171 { 1800, 128},
172 { 2400, 96},
173 { 4800, 48},
174 { 7200, 32},
175 { 9600, 24},
176 { 14400, 16},
177 { 19200, 12},
178 { 38400, 6},
179 { 57600, 4},
180 { 115200, 2},
181 { 230400, 1},
182 };
183
184 /* Number of outstanding Command Write Urbs */
185 static atomic_t CmdUrbs = ATOMIC_INIT(0);
186
187
188 /* local function prototypes */
189
190 /* function prototypes for all URB callbacks */
191 static void edge_interrupt_callback(struct urb *urb);
192 static void edge_bulk_in_callback(struct urb *urb);
193 static void edge_bulk_out_data_callback(struct urb *urb);
194 static void edge_bulk_out_cmd_callback(struct urb *urb);
195
196 /* function prototypes for the usbserial callbacks */
197 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
198 static void edge_close(struct usb_serial_port *port);
199 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
200 const unsigned char *buf, int count);
201 static int edge_write_room(struct tty_struct *tty);
202 static int edge_chars_in_buffer(struct tty_struct *tty);
203 static void edge_throttle(struct tty_struct *tty);
204 static void edge_unthrottle(struct tty_struct *tty);
205 static void edge_set_termios(struct tty_struct *tty,
206 struct usb_serial_port *port,
207 struct ktermios *old_termios);
208 static int edge_ioctl(struct tty_struct *tty,
209 unsigned int cmd, unsigned long arg);
210 static void edge_break(struct tty_struct *tty, int break_state);
211 static int edge_tiocmget(struct tty_struct *tty);
212 static int edge_tiocmset(struct tty_struct *tty,
213 unsigned int set, unsigned int clear);
214 static int edge_startup(struct usb_serial *serial);
215 static void edge_disconnect(struct usb_serial *serial);
216 static void edge_release(struct usb_serial *serial);
217 static int edge_port_probe(struct usb_serial_port *port);
218 static int edge_port_remove(struct usb_serial_port *port);
219
220 #include "io_tables.h" /* all of the devices that this driver supports */
221
222 /* function prototypes for all of our local functions */
223
224 static void process_rcvd_data(struct edgeport_serial *edge_serial,
225 unsigned char *buffer, __u16 bufferLength);
226 static void process_rcvd_status(struct edgeport_serial *edge_serial,
227 __u8 byte2, __u8 byte3);
228 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
229 int length);
230 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
231 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
232 __u8 lsr, __u8 data);
233 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
234 __u8 param);
235 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
236 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
237 int baudRate);
238 static void change_port_settings(struct tty_struct *tty,
239 struct edgeport_port *edge_port,
240 struct ktermios *old_termios);
241 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
242 __u8 regNum, __u8 regValue);
243 static int write_cmd_usb(struct edgeport_port *edge_port,
244 unsigned char *buffer, int writeLength);
245 static void send_more_port_data(struct edgeport_serial *edge_serial,
246 struct edgeport_port *edge_port);
247
248 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
249 __u16 length, const __u8 *data);
250 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
251 __u16 length, __u8 *data);
252 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
253 __u16 length, const __u8 *data);
254 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
255 static void get_boot_desc(struct edgeport_serial *edge_serial);
256 static void load_application_firmware(struct edgeport_serial *edge_serial);
257
258 static void unicode_to_ascii(char *string, int buflen,
259 __le16 *unicode, int unicode_size);
260
261
262 /* ************************************************************************ */
263 /* ************************************************************************ */
264 /* ************************************************************************ */
265 /* ************************************************************************ */
266
267 /************************************************************************
268 * *
269 * update_edgeport_E2PROM() Compare current versions of *
270 * Boot ROM and Manufacture *
271 * Descriptors with versions *
272 * embedded in this driver *
273 * *
274 ************************************************************************/
275 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
276 {
277 struct device *dev = &edge_serial->serial->dev->dev;
278 __u32 BootCurVer;
279 __u32 BootNewVer;
280 __u8 BootMajorVersion;
281 __u8 BootMinorVersion;
282 __u16 BootBuildNumber;
283 __u32 Bootaddr;
284 const struct ihex_binrec *rec;
285 const struct firmware *fw;
286 const char *fw_name;
287 int response;
288
289 switch (edge_serial->product_info.iDownloadFile) {
290 case EDGE_DOWNLOAD_FILE_I930:
291 fw_name = "edgeport/boot.fw";
292 break;
293 case EDGE_DOWNLOAD_FILE_80251:
294 fw_name = "edgeport/boot2.fw";
295 break;
296 default:
297 return;
298 }
299
300 response = request_ihex_firmware(&fw, fw_name,
301 &edge_serial->serial->dev->dev);
302 if (response) {
303 dev_err(dev, "Failed to load image \"%s\" err %d\n",
304 fw_name, response);
305 return;
306 }
307
308 rec = (const struct ihex_binrec *)fw->data;
309 BootMajorVersion = rec->data[0];
310 BootMinorVersion = rec->data[1];
311 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
312
313 /* Check Boot Image Version */
314 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
315 (edge_serial->boot_descriptor.MinorVersion << 16) +
316 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
317
318 BootNewVer = (BootMajorVersion << 24) +
319 (BootMinorVersion << 16) +
320 BootBuildNumber;
321
322 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
323 edge_serial->boot_descriptor.MajorVersion,
324 edge_serial->boot_descriptor.MinorVersion,
325 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
326
327
328 if (BootNewVer > BootCurVer) {
329 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
330 edge_serial->boot_descriptor.MajorVersion,
331 edge_serial->boot_descriptor.MinorVersion,
332 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
333 BootMajorVersion, BootMinorVersion, BootBuildNumber);
334
335 dev_dbg(dev, "Downloading new Boot Image\n");
336
337 for (rec = ihex_next_binrec(rec); rec;
338 rec = ihex_next_binrec(rec)) {
339 Bootaddr = be32_to_cpu(rec->addr);
340 response = rom_write(edge_serial->serial,
341 Bootaddr >> 16,
342 Bootaddr & 0xFFFF,
343 be16_to_cpu(rec->len),
344 &rec->data[0]);
345 if (response < 0) {
346 dev_err(&edge_serial->serial->dev->dev,
347 "rom_write failed (%x, %x, %d)\n",
348 Bootaddr >> 16, Bootaddr & 0xFFFF,
349 be16_to_cpu(rec->len));
350 break;
351 }
352 }
353 } else {
354 dev_dbg(dev, "Boot Image -- already up to date\n");
355 }
356 release_firmware(fw);
357 }
358
359 #if 0
360 /************************************************************************
361 *
362 * Get string descriptor from device
363 *
364 ************************************************************************/
365 static int get_string_desc(struct usb_device *dev, int Id,
366 struct usb_string_descriptor **pRetDesc)
367 {
368 struct usb_string_descriptor StringDesc;
369 struct usb_string_descriptor *pStringDesc;
370
371 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
372
373 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
374 sizeof(StringDesc)))
375 return 0;
376
377 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
378 if (!pStringDesc)
379 return -1;
380
381 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
382 StringDesc.bLength)) {
383 kfree(pStringDesc);
384 return -1;
385 }
386
387 *pRetDesc = pStringDesc;
388 return 0;
389 }
390 #endif
391
392 static void dump_product_info(struct edgeport_serial *edge_serial,
393 struct edgeport_product_info *product_info)
394 {
395 struct device *dev = &edge_serial->serial->dev->dev;
396
397 /* Dump Product Info structure */
398 dev_dbg(dev, "**Product Information:\n");
399 dev_dbg(dev, " ProductId %x\n", product_info->ProductId);
400 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts);
401 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer);
402 dev_dbg(dev, " IsServer %d\n", product_info->IsServer);
403 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232);
404 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422);
405 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485);
406 dev_dbg(dev, " RomSize %d\n", product_info->RomSize);
407 dev_dbg(dev, " RamSize %d\n", product_info->RamSize);
408 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev);
409 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev);
410 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n",
411 product_info->BootMajorVersion,
412 product_info->BootMinorVersion,
413 le16_to_cpu(product_info->BootBuildNumber));
414 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n",
415 product_info->FirmwareMajorVersion,
416 product_info->FirmwareMinorVersion,
417 le16_to_cpu(product_info->FirmwareBuildNumber));
418 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n",
419 product_info->ManufactureDescDate[0],
420 product_info->ManufactureDescDate[1],
421 product_info->ManufactureDescDate[2]+1900);
422 dev_dbg(dev, " iDownloadFile 0x%x\n",
423 product_info->iDownloadFile);
424 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer);
425 }
426
427 static void get_product_info(struct edgeport_serial *edge_serial)
428 {
429 struct edgeport_product_info *product_info = &edge_serial->product_info;
430
431 memset(product_info, 0, sizeof(struct edgeport_product_info));
432
433 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
434 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
435 product_info->ProdInfoVer = 0;
436
437 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
438 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
439 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
440 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
441
442 product_info->BootMajorVersion =
443 edge_serial->boot_descriptor.MajorVersion;
444 product_info->BootMinorVersion =
445 edge_serial->boot_descriptor.MinorVersion;
446 product_info->BootBuildNumber =
447 edge_serial->boot_descriptor.BuildNumber;
448
449 memcpy(product_info->ManufactureDescDate,
450 edge_serial->manuf_descriptor.DescDate,
451 sizeof(edge_serial->manuf_descriptor.DescDate));
452
453 /* check if this is 2nd generation hardware */
454 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
455 & ION_DEVICE_ID_80251_NETCHIP)
456 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
457 else
458 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
459
460 /* Determine Product type and set appropriate flags */
461 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
462 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
463 case ION_DEVICE_ID_EDGEPORT_4T:
464 case ION_DEVICE_ID_EDGEPORT_4:
465 case ION_DEVICE_ID_EDGEPORT_2:
466 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
467 case ION_DEVICE_ID_EDGEPORT_8:
468 case ION_DEVICE_ID_EDGEPORT_421:
469 case ION_DEVICE_ID_EDGEPORT_21:
470 case ION_DEVICE_ID_EDGEPORT_2_DIN:
471 case ION_DEVICE_ID_EDGEPORT_4_DIN:
472 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
473 product_info->IsRS232 = 1;
474 break;
475
476 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
477 product_info->IsRS422 = 1;
478 product_info->IsRS485 = 1;
479 break;
480
481 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
482 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
483 product_info->IsRS422 = 1;
484 break;
485 }
486
487 dump_product_info(edge_serial, product_info);
488 }
489
490 static int get_epic_descriptor(struct edgeport_serial *ep)
491 {
492 int result;
493 struct usb_serial *serial = ep->serial;
494 struct edgeport_product_info *product_info = &ep->product_info;
495 struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
496 struct edge_compatibility_bits *bits;
497 struct device *dev = &serial->dev->dev;
498
499 ep->is_epic = 0;
500 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
501 USB_REQUEST_ION_GET_EPIC_DESC,
502 0xC0, 0x00, 0x00,
503 &ep->epic_descriptor,
504 sizeof(struct edge_compatibility_descriptor),
505 300);
506
507 if (result > 0) {
508 ep->is_epic = 1;
509 memset(product_info, 0, sizeof(struct edgeport_product_info));
510
511 product_info->NumPorts = epic->NumPorts;
512 product_info->ProdInfoVer = 0;
513 product_info->FirmwareMajorVersion = epic->MajorVersion;
514 product_info->FirmwareMinorVersion = epic->MinorVersion;
515 product_info->FirmwareBuildNumber = epic->BuildNumber;
516 product_info->iDownloadFile = epic->iDownloadFile;
517 product_info->EpicVer = epic->EpicVer;
518 product_info->Epic = epic->Supports;
519 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
520 dump_product_info(ep, product_info);
521
522 bits = &ep->epic_descriptor.Supports;
523 dev_dbg(dev, "**EPIC descriptor:\n");
524 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
525 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE");
526 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE");
527 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE");
528 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
529 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
530 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE");
531 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
532 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
533 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE");
534 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE");
535 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
536 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE");
537 }
538
539 return result;
540 }
541
542
543 /************************************************************************/
544 /************************************************************************/
545 /* U S B C A L L B A C K F U N C T I O N S */
546 /* U S B C A L L B A C K F U N C T I O N S */
547 /************************************************************************/
548 /************************************************************************/
549
550 /*****************************************************************************
551 * edge_interrupt_callback
552 * this is the callback function for when we have received data on the
553 * interrupt endpoint.
554 *****************************************************************************/
555 static void edge_interrupt_callback(struct urb *urb)
556 {
557 struct edgeport_serial *edge_serial = urb->context;
558 struct device *dev;
559 struct edgeport_port *edge_port;
560 struct usb_serial_port *port;
561 unsigned char *data = urb->transfer_buffer;
562 int length = urb->actual_length;
563 int bytes_avail;
564 int position;
565 int txCredits;
566 int portNumber;
567 int result;
568 int status = urb->status;
569
570 switch (status) {
571 case 0:
572 /* success */
573 break;
574 case -ECONNRESET:
575 case -ENOENT:
576 case -ESHUTDOWN:
577 /* this urb is terminated, clean up */
578 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
579 return;
580 default:
581 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
582 goto exit;
583 }
584
585 dev = &edge_serial->serial->dev->dev;
586
587 /* process this interrupt-read even if there are no ports open */
588 if (length) {
589 usb_serial_debug_data(dev, __func__, length, data);
590
591 if (length > 1) {
592 bytes_avail = data[0] | (data[1] << 8);
593 if (bytes_avail) {
594 spin_lock(&edge_serial->es_lock);
595 edge_serial->rxBytesAvail += bytes_avail;
596 dev_dbg(dev,
597 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
598 __func__, bytes_avail,
599 edge_serial->rxBytesAvail,
600 edge_serial->read_in_progress);
601
602 if (edge_serial->rxBytesAvail > 0 &&
603 !edge_serial->read_in_progress) {
604 dev_dbg(dev, "%s - posting a read\n", __func__);
605 edge_serial->read_in_progress = true;
606
607 /* we have pending bytes on the
608 bulk in pipe, send a request */
609 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
610 if (result) {
611 dev_err(dev,
612 "%s - usb_submit_urb(read bulk) failed with result = %d\n",
613 __func__, result);
614 edge_serial->read_in_progress = false;
615 }
616 }
617 spin_unlock(&edge_serial->es_lock);
618 }
619 }
620 /* grab the txcredits for the ports if available */
621 position = 2;
622 portNumber = 0;
623 while ((position < length) &&
624 (portNumber < edge_serial->serial->num_ports)) {
625 txCredits = data[position] | (data[position+1] << 8);
626 if (txCredits) {
627 port = edge_serial->serial->port[portNumber];
628 edge_port = usb_get_serial_port_data(port);
629 if (edge_port->open) {
630 spin_lock(&edge_port->ep_lock);
631 edge_port->txCredits += txCredits;
632 spin_unlock(&edge_port->ep_lock);
633 dev_dbg(dev, "%s - txcredits for port%d = %d\n",
634 __func__, portNumber,
635 edge_port->txCredits);
636
637 /* tell the tty driver that something
638 has changed */
639 tty_port_tty_wakeup(&edge_port->port->port);
640 /* Since we have more credit, check
641 if more data can be sent */
642 send_more_port_data(edge_serial,
643 edge_port);
644 }
645 }
646 position += 2;
647 ++portNumber;
648 }
649 }
650
651 exit:
652 result = usb_submit_urb(urb, GFP_ATOMIC);
653 if (result)
654 dev_err(&urb->dev->dev,
655 "%s - Error %d submitting control urb\n",
656 __func__, result);
657 }
658
659
660 /*****************************************************************************
661 * edge_bulk_in_callback
662 * this is the callback function for when we have received data on the
663 * bulk in endpoint.
664 *****************************************************************************/
665 static void edge_bulk_in_callback(struct urb *urb)
666 {
667 struct edgeport_serial *edge_serial = urb->context;
668 struct device *dev;
669 unsigned char *data = urb->transfer_buffer;
670 int retval;
671 __u16 raw_data_length;
672 int status = urb->status;
673
674 if (status) {
675 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
676 __func__, status);
677 edge_serial->read_in_progress = false;
678 return;
679 }
680
681 if (urb->actual_length == 0) {
682 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
683 edge_serial->read_in_progress = false;
684 return;
685 }
686
687 dev = &edge_serial->serial->dev->dev;
688 raw_data_length = urb->actual_length;
689
690 usb_serial_debug_data(dev, __func__, raw_data_length, data);
691
692 spin_lock(&edge_serial->es_lock);
693
694 /* decrement our rxBytes available by the number that we just got */
695 edge_serial->rxBytesAvail -= raw_data_length;
696
697 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
698 raw_data_length, edge_serial->rxBytesAvail);
699
700 process_rcvd_data(edge_serial, data, urb->actual_length);
701
702 /* check to see if there's any more data for us to read */
703 if (edge_serial->rxBytesAvail > 0) {
704 dev_dbg(dev, "%s - posting a read\n", __func__);
705 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
706 if (retval) {
707 dev_err(dev,
708 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
709 __func__, retval);
710 edge_serial->read_in_progress = false;
711 }
712 } else {
713 edge_serial->read_in_progress = false;
714 }
715
716 spin_unlock(&edge_serial->es_lock);
717 }
718
719
720 /*****************************************************************************
721 * edge_bulk_out_data_callback
722 * this is the callback function for when we have finished sending
723 * serial data on the bulk out endpoint.
724 *****************************************************************************/
725 static void edge_bulk_out_data_callback(struct urb *urb)
726 {
727 struct edgeport_port *edge_port = urb->context;
728 int status = urb->status;
729
730 if (status) {
731 dev_dbg(&urb->dev->dev,
732 "%s - nonzero write bulk status received: %d\n",
733 __func__, status);
734 }
735
736 if (edge_port->open)
737 tty_port_tty_wakeup(&edge_port->port->port);
738
739 /* Release the Write URB */
740 edge_port->write_in_progress = false;
741
742 /* Check if more data needs to be sent */
743 send_more_port_data((struct edgeport_serial *)
744 (usb_get_serial_data(edge_port->port->serial)), edge_port);
745 }
746
747
748 /*****************************************************************************
749 * BulkOutCmdCallback
750 * this is the callback function for when we have finished sending a
751 * command on the bulk out endpoint.
752 *****************************************************************************/
753 static void edge_bulk_out_cmd_callback(struct urb *urb)
754 {
755 struct edgeport_port *edge_port = urb->context;
756 int status = urb->status;
757
758 atomic_dec(&CmdUrbs);
759 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
760 __func__, urb, atomic_read(&CmdUrbs));
761
762
763 /* clean up the transfer buffer */
764 kfree(urb->transfer_buffer);
765
766 /* Free the command urb */
767 usb_free_urb(urb);
768
769 if (status) {
770 dev_dbg(&urb->dev->dev,
771 "%s - nonzero write bulk status received: %d\n",
772 __func__, status);
773 return;
774 }
775
776 /* tell the tty driver that something has changed */
777 if (edge_port->open)
778 tty_port_tty_wakeup(&edge_port->port->port);
779
780 /* we have completed the command */
781 edge_port->commandPending = false;
782 wake_up(&edge_port->wait_command);
783 }
784
785
786 /*****************************************************************************
787 * Driver tty interface functions
788 *****************************************************************************/
789
790 /*****************************************************************************
791 * SerialOpen
792 * this function is called by the tty driver when a port is opened
793 * If successful, we return 0
794 * Otherwise we return a negative error number.
795 *****************************************************************************/
796 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
797 {
798 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
799 struct device *dev = &port->dev;
800 struct usb_serial *serial;
801 struct edgeport_serial *edge_serial;
802 int response;
803
804 if (edge_port == NULL)
805 return -ENODEV;
806
807 /* see if we've set up our endpoint info yet (can't set it up
808 in edge_startup as the structures were not set up at that time.) */
809 serial = port->serial;
810 edge_serial = usb_get_serial_data(serial);
811 if (edge_serial == NULL)
812 return -ENODEV;
813 if (edge_serial->interrupt_in_buffer == NULL) {
814 struct usb_serial_port *port0 = serial->port[0];
815
816 /* not set up yet, so do it now */
817 edge_serial->interrupt_in_buffer =
818 port0->interrupt_in_buffer;
819 edge_serial->interrupt_in_endpoint =
820 port0->interrupt_in_endpointAddress;
821 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
822 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
823 edge_serial->bulk_in_endpoint =
824 port0->bulk_in_endpointAddress;
825 edge_serial->read_urb = port0->read_urb;
826 edge_serial->bulk_out_endpoint =
827 port0->bulk_out_endpointAddress;
828
829 /* set up our interrupt urb */
830 usb_fill_int_urb(edge_serial->interrupt_read_urb,
831 serial->dev,
832 usb_rcvintpipe(serial->dev,
833 port0->interrupt_in_endpointAddress),
834 port0->interrupt_in_buffer,
835 edge_serial->interrupt_read_urb->transfer_buffer_length,
836 edge_interrupt_callback, edge_serial,
837 edge_serial->interrupt_read_urb->interval);
838
839 /* set up our bulk in urb */
840 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
841 usb_rcvbulkpipe(serial->dev,
842 port0->bulk_in_endpointAddress),
843 port0->bulk_in_buffer,
844 edge_serial->read_urb->transfer_buffer_length,
845 edge_bulk_in_callback, edge_serial);
846 edge_serial->read_in_progress = false;
847
848 /* start interrupt read for this edgeport
849 * this interrupt will continue as long
850 * as the edgeport is connected */
851 response = usb_submit_urb(edge_serial->interrupt_read_urb,
852 GFP_KERNEL);
853 if (response) {
854 dev_err(dev, "%s - Error %d submitting control urb\n",
855 __func__, response);
856 }
857 }
858
859 /* initialize our wait queues */
860 init_waitqueue_head(&edge_port->wait_open);
861 init_waitqueue_head(&edge_port->wait_chase);
862 init_waitqueue_head(&edge_port->wait_command);
863
864 /* initialize our port settings */
865 edge_port->txCredits = 0; /* Can't send any data yet */
866 /* Must always set this bit to enable ints! */
867 edge_port->shadowMCR = MCR_MASTER_IE;
868 edge_port->chaseResponsePending = false;
869
870 /* send a open port command */
871 edge_port->openPending = true;
872 edge_port->open = false;
873 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
874
875 if (response < 0) {
876 dev_err(dev, "%s - error sending open port command\n", __func__);
877 edge_port->openPending = false;
878 return -ENODEV;
879 }
880
881 /* now wait for the port to be completely opened */
882 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
883 OPEN_TIMEOUT);
884
885 if (!edge_port->open) {
886 /* open timed out */
887 dev_dbg(dev, "%s - open timedout\n", __func__);
888 edge_port->openPending = false;
889 return -ENODEV;
890 }
891
892 /* create the txfifo */
893 edge_port->txfifo.head = 0;
894 edge_port->txfifo.tail = 0;
895 edge_port->txfifo.count = 0;
896 edge_port->txfifo.size = edge_port->maxTxCredits;
897 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
898
899 if (!edge_port->txfifo.fifo) {
900 edge_close(port);
901 return -ENOMEM;
902 }
903
904 /* Allocate a URB for the write */
905 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
906 edge_port->write_in_progress = false;
907
908 if (!edge_port->write_urb) {
909 edge_close(port);
910 return -ENOMEM;
911 }
912
913 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
914 __func__, edge_port->maxTxCredits);
915
916 return 0;
917 }
918
919
920 /************************************************************************
921 *
922 * block_until_chase_response
923 *
924 * This function will block the close until one of the following:
925 * 1. Response to our Chase comes from Edgeport
926 * 2. A timeout of 10 seconds without activity has expired
927 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
928 *
929 ************************************************************************/
930 static void block_until_chase_response(struct edgeport_port *edge_port)
931 {
932 struct device *dev = &edge_port->port->dev;
933 DEFINE_WAIT(wait);
934 __u16 lastCredits;
935 int timeout = 1*HZ;
936 int loop = 10;
937
938 while (1) {
939 /* Save Last credits */
940 lastCredits = edge_port->txCredits;
941
942 /* Did we get our Chase response */
943 if (!edge_port->chaseResponsePending) {
944 dev_dbg(dev, "%s - Got Chase Response\n", __func__);
945
946 /* did we get all of our credit back? */
947 if (edge_port->txCredits == edge_port->maxTxCredits) {
948 dev_dbg(dev, "%s - Got all credits\n", __func__);
949 return;
950 }
951 }
952
953 /* Block the thread for a while */
954 prepare_to_wait(&edge_port->wait_chase, &wait,
955 TASK_UNINTERRUPTIBLE);
956 schedule_timeout(timeout);
957 finish_wait(&edge_port->wait_chase, &wait);
958
959 if (lastCredits == edge_port->txCredits) {
960 /* No activity.. count down. */
961 loop--;
962 if (loop == 0) {
963 edge_port->chaseResponsePending = false;
964 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
965 return;
966 }
967 } else {
968 /* Reset timeout value back to 10 seconds */
969 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
970 lastCredits, edge_port->txCredits);
971 loop = 10;
972 }
973 }
974 }
975
976
977 /************************************************************************
978 *
979 * block_until_tx_empty
980 *
981 * This function will block the close until one of the following:
982 * 1. TX count are 0
983 * 2. The edgeport has stopped
984 * 3. A timeout of 3 seconds without activity has expired
985 *
986 ************************************************************************/
987 static void block_until_tx_empty(struct edgeport_port *edge_port)
988 {
989 struct device *dev = &edge_port->port->dev;
990 DEFINE_WAIT(wait);
991 struct TxFifo *fifo = &edge_port->txfifo;
992 __u32 lastCount;
993 int timeout = HZ/10;
994 int loop = 30;
995
996 while (1) {
997 /* Save Last count */
998 lastCount = fifo->count;
999
1000 /* Is the Edgeport Buffer empty? */
1001 if (lastCount == 0) {
1002 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1003 return;
1004 }
1005
1006 /* Block the thread for a while */
1007 prepare_to_wait(&edge_port->wait_chase, &wait,
1008 TASK_UNINTERRUPTIBLE);
1009 schedule_timeout(timeout);
1010 finish_wait(&edge_port->wait_chase, &wait);
1011
1012 dev_dbg(dev, "%s wait\n", __func__);
1013
1014 if (lastCount == fifo->count) {
1015 /* No activity.. count down. */
1016 loop--;
1017 if (loop == 0) {
1018 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1019 return;
1020 }
1021 } else {
1022 /* Reset timeout value back to seconds */
1023 loop = 30;
1024 }
1025 }
1026 }
1027
1028
1029 /*****************************************************************************
1030 * edge_close
1031 * this function is called by the tty driver when a port is closed
1032 *****************************************************************************/
1033 static void edge_close(struct usb_serial_port *port)
1034 {
1035 struct edgeport_serial *edge_serial;
1036 struct edgeport_port *edge_port;
1037 int status;
1038
1039 edge_serial = usb_get_serial_data(port->serial);
1040 edge_port = usb_get_serial_port_data(port);
1041 if (edge_serial == NULL || edge_port == NULL)
1042 return;
1043
1044 /* block until tx is empty */
1045 block_until_tx_empty(edge_port);
1046
1047 edge_port->closePending = true;
1048
1049 if (!edge_serial->is_epic ||
1050 edge_serial->epic_descriptor.Supports.IOSPChase) {
1051 /* flush and chase */
1052 edge_port->chaseResponsePending = true;
1053
1054 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1055 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1056 if (status == 0)
1057 /* block until chase finished */
1058 block_until_chase_response(edge_port);
1059 else
1060 edge_port->chaseResponsePending = false;
1061 }
1062
1063 if (!edge_serial->is_epic ||
1064 edge_serial->epic_descriptor.Supports.IOSPClose) {
1065 /* close the port */
1066 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1067 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1068 }
1069
1070 /* port->close = true; */
1071 edge_port->closePending = false;
1072 edge_port->open = false;
1073 edge_port->openPending = false;
1074
1075 usb_kill_urb(edge_port->write_urb);
1076
1077 if (edge_port->write_urb) {
1078 /* if this urb had a transfer buffer already
1079 (old transfer) free it */
1080 kfree(edge_port->write_urb->transfer_buffer);
1081 usb_free_urb(edge_port->write_urb);
1082 edge_port->write_urb = NULL;
1083 }
1084 kfree(edge_port->txfifo.fifo);
1085 edge_port->txfifo.fifo = NULL;
1086 }
1087
1088 /*****************************************************************************
1089 * SerialWrite
1090 * this function is called by the tty driver when data should be written
1091 * to the port.
1092 * If successful, we return the number of bytes written, otherwise we
1093 * return a negative error number.
1094 *****************************************************************************/
1095 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1096 const unsigned char *data, int count)
1097 {
1098 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1099 struct TxFifo *fifo;
1100 int copySize;
1101 int bytesleft;
1102 int firsthalf;
1103 int secondhalf;
1104 unsigned long flags;
1105
1106 if (edge_port == NULL)
1107 return -ENODEV;
1108
1109 /* get a pointer to the Tx fifo */
1110 fifo = &edge_port->txfifo;
1111
1112 spin_lock_irqsave(&edge_port->ep_lock, flags);
1113
1114 /* calculate number of bytes to put in fifo */
1115 copySize = min((unsigned int)count,
1116 (edge_port->txCredits - fifo->count));
1117
1118 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n",
1119 __func__, count, edge_port->txCredits - fifo->count, copySize);
1120
1121 /* catch writes of 0 bytes which the tty driver likes to give us,
1122 and when txCredits is empty */
1123 if (copySize == 0) {
1124 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1125 goto finish_write;
1126 }
1127
1128 /* queue the data
1129 * since we can never overflow the buffer we do not have to check for a
1130 * full condition
1131 *
1132 * the copy is done is two parts -- first fill to the end of the buffer
1133 * then copy the reset from the start of the buffer
1134 */
1135 bytesleft = fifo->size - fifo->head;
1136 firsthalf = min(bytesleft, copySize);
1137 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1138 firsthalf, bytesleft);
1139
1140 /* now copy our data */
1141 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1142 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1143
1144 /* update the index and size */
1145 fifo->head += firsthalf;
1146 fifo->count += firsthalf;
1147
1148 /* wrap the index */
1149 if (fifo->head == fifo->size)
1150 fifo->head = 0;
1151
1152 secondhalf = copySize-firsthalf;
1153
1154 if (secondhalf) {
1155 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1156 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1157 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1158 /* update the index and size */
1159 fifo->count += secondhalf;
1160 fifo->head += secondhalf;
1161 /* No need to check for wrap since we can not get to end of
1162 * the fifo in this part
1163 */
1164 }
1165
1166 finish_write:
1167 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1168
1169 send_more_port_data((struct edgeport_serial *)
1170 usb_get_serial_data(port->serial), edge_port);
1171
1172 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1173 __func__, copySize, edge_port->txCredits, fifo->count);
1174
1175 return copySize;
1176 }
1177
1178
1179 /************************************************************************
1180 *
1181 * send_more_port_data()
1182 *
1183 * This routine attempts to write additional UART transmit data
1184 * to a port over the USB bulk pipe. It is called (1) when new
1185 * data has been written to a port's TxBuffer from higher layers
1186 * (2) when the peripheral sends us additional TxCredits indicating
1187 * that it can accept more Tx data for a given port; and (3) when
1188 * a bulk write completes successfully and we want to see if we
1189 * can transmit more.
1190 *
1191 ************************************************************************/
1192 static void send_more_port_data(struct edgeport_serial *edge_serial,
1193 struct edgeport_port *edge_port)
1194 {
1195 struct TxFifo *fifo = &edge_port->txfifo;
1196 struct device *dev = &edge_port->port->dev;
1197 struct urb *urb;
1198 unsigned char *buffer;
1199 int status;
1200 int count;
1201 int bytesleft;
1202 int firsthalf;
1203 int secondhalf;
1204 unsigned long flags;
1205
1206 spin_lock_irqsave(&edge_port->ep_lock, flags);
1207
1208 if (edge_port->write_in_progress ||
1209 !edge_port->open ||
1210 (fifo->count == 0)) {
1211 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1212 __func__, fifo->count, edge_port->write_in_progress);
1213 goto exit_send;
1214 }
1215
1216 /* since the amount of data in the fifo will always fit into the
1217 * edgeport buffer we do not need to check the write length
1218 *
1219 * Do we have enough credits for this port to make it worthwhile
1220 * to bother queueing a write. If it's too small, say a few bytes,
1221 * it's better to wait for more credits so we can do a larger write.
1222 */
1223 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1224 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1225 __func__, fifo->count, edge_port->txCredits);
1226 goto exit_send;
1227 }
1228
1229 /* lock this write */
1230 edge_port->write_in_progress = true;
1231
1232 /* get a pointer to the write_urb */
1233 urb = edge_port->write_urb;
1234
1235 /* make sure transfer buffer is freed */
1236 kfree(urb->transfer_buffer);
1237 urb->transfer_buffer = NULL;
1238
1239 /* build the data header for the buffer and port that we are about
1240 to send out */
1241 count = fifo->count;
1242 buffer = kmalloc(count+2, GFP_ATOMIC);
1243 if (!buffer) {
1244 edge_port->write_in_progress = false;
1245 goto exit_send;
1246 }
1247 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1248 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1249
1250 /* now copy our data */
1251 bytesleft = fifo->size - fifo->tail;
1252 firsthalf = min(bytesleft, count);
1253 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1254 fifo->tail += firsthalf;
1255 fifo->count -= firsthalf;
1256 if (fifo->tail == fifo->size)
1257 fifo->tail = 0;
1258
1259 secondhalf = count-firsthalf;
1260 if (secondhalf) {
1261 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1262 secondhalf);
1263 fifo->tail += secondhalf;
1264 fifo->count -= secondhalf;
1265 }
1266
1267 if (count)
1268 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1269
1270 /* fill up the urb with all of our data and submit it */
1271 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1272 usb_sndbulkpipe(edge_serial->serial->dev,
1273 edge_serial->bulk_out_endpoint),
1274 buffer, count+2,
1275 edge_bulk_out_data_callback, edge_port);
1276
1277 /* decrement the number of credits we have by the number we just sent */
1278 edge_port->txCredits -= count;
1279 edge_port->port->icount.tx += count;
1280
1281 status = usb_submit_urb(urb, GFP_ATOMIC);
1282 if (status) {
1283 /* something went wrong */
1284 dev_err_console(edge_port->port,
1285 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1286 __func__, status);
1287 edge_port->write_in_progress = false;
1288
1289 /* revert the credits as something bad happened. */
1290 edge_port->txCredits += count;
1291 edge_port->port->icount.tx -= count;
1292 }
1293 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1294 __func__, count, edge_port->txCredits, fifo->count);
1295
1296 exit_send:
1297 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1298 }
1299
1300
1301 /*****************************************************************************
1302 * edge_write_room
1303 * this function is called by the tty driver when it wants to know how
1304 * many bytes of data we can accept for a specific port. If successful,
1305 * we return the amount of room that we have for this port (the txCredits)
1306 * otherwise we return a negative error number.
1307 *****************************************************************************/
1308 static int edge_write_room(struct tty_struct *tty)
1309 {
1310 struct usb_serial_port *port = tty->driver_data;
1311 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1312 int room;
1313 unsigned long flags;
1314
1315 if (edge_port == NULL)
1316 return 0;
1317 if (edge_port->closePending)
1318 return 0;
1319
1320 if (!edge_port->open) {
1321 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1322 return 0;
1323 }
1324
1325 /* total of both buffers is still txCredit */
1326 spin_lock_irqsave(&edge_port->ep_lock, flags);
1327 room = edge_port->txCredits - edge_port->txfifo.count;
1328 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1329
1330 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1331 return room;
1332 }
1333
1334
1335 /*****************************************************************************
1336 * edge_chars_in_buffer
1337 * this function is called by the tty driver when it wants to know how
1338 * many bytes of data we currently have outstanding in the port (data that
1339 * has been written, but hasn't made it out the port yet)
1340 * If successful, we return the number of bytes left to be written in the
1341 * system,
1342 * Otherwise we return a negative error number.
1343 *****************************************************************************/
1344 static int edge_chars_in_buffer(struct tty_struct *tty)
1345 {
1346 struct usb_serial_port *port = tty->driver_data;
1347 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1348 int num_chars;
1349 unsigned long flags;
1350
1351 if (edge_port == NULL)
1352 return 0;
1353 if (edge_port->closePending)
1354 return 0;
1355
1356 if (!edge_port->open) {
1357 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1358 return 0;
1359 }
1360
1361 spin_lock_irqsave(&edge_port->ep_lock, flags);
1362 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1363 edge_port->txfifo.count;
1364 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1365 if (num_chars) {
1366 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1367 }
1368
1369 return num_chars;
1370 }
1371
1372
1373 /*****************************************************************************
1374 * SerialThrottle
1375 * this function is called by the tty driver when it wants to stop the data
1376 * being read from the port.
1377 *****************************************************************************/
1378 static void edge_throttle(struct tty_struct *tty)
1379 {
1380 struct usb_serial_port *port = tty->driver_data;
1381 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1382 int status;
1383
1384 if (edge_port == NULL)
1385 return;
1386
1387 if (!edge_port->open) {
1388 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1389 return;
1390 }
1391
1392 /* if we are implementing XON/XOFF, send the stop character */
1393 if (I_IXOFF(tty)) {
1394 unsigned char stop_char = STOP_CHAR(tty);
1395 status = edge_write(tty, port, &stop_char, 1);
1396 if (status <= 0)
1397 return;
1398 }
1399
1400 /* if we are implementing RTS/CTS, toggle that line */
1401 if (C_CRTSCTS(tty)) {
1402 edge_port->shadowMCR &= ~MCR_RTS;
1403 status = send_cmd_write_uart_register(edge_port, MCR,
1404 edge_port->shadowMCR);
1405 if (status != 0)
1406 return;
1407 }
1408 }
1409
1410
1411 /*****************************************************************************
1412 * edge_unthrottle
1413 * this function is called by the tty driver when it wants to resume the
1414 * data being read from the port (called after SerialThrottle is called)
1415 *****************************************************************************/
1416 static void edge_unthrottle(struct tty_struct *tty)
1417 {
1418 struct usb_serial_port *port = tty->driver_data;
1419 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1420 int status;
1421
1422 if (edge_port == NULL)
1423 return;
1424
1425 if (!edge_port->open) {
1426 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1427 return;
1428 }
1429
1430 /* if we are implementing XON/XOFF, send the start character */
1431 if (I_IXOFF(tty)) {
1432 unsigned char start_char = START_CHAR(tty);
1433 status = edge_write(tty, port, &start_char, 1);
1434 if (status <= 0)
1435 return;
1436 }
1437 /* if we are implementing RTS/CTS, toggle that line */
1438 if (C_CRTSCTS(tty)) {
1439 edge_port->shadowMCR |= MCR_RTS;
1440 send_cmd_write_uart_register(edge_port, MCR,
1441 edge_port->shadowMCR);
1442 }
1443 }
1444
1445
1446 /*****************************************************************************
1447 * SerialSetTermios
1448 * this function is called by the tty driver when it wants to change
1449 * the termios structure
1450 *****************************************************************************/
1451 static void edge_set_termios(struct tty_struct *tty,
1452 struct usb_serial_port *port, struct ktermios *old_termios)
1453 {
1454 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1455 unsigned int cflag;
1456
1457 cflag = tty->termios.c_cflag;
1458 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1459 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1460
1461 if (edge_port == NULL)
1462 return;
1463
1464 if (!edge_port->open) {
1465 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1466 return;
1467 }
1468
1469 /* change the port settings to the new ones specified */
1470 change_port_settings(tty, edge_port, old_termios);
1471 }
1472
1473
1474 /*****************************************************************************
1475 * get_lsr_info - get line status register info
1476 *
1477 * Purpose: Let user call ioctl() to get info when the UART physically
1478 * is emptied. On bus types like RS485, the transmitter must
1479 * release the bus after transmitting. This must be done when
1480 * the transmit shift register is empty, not be done when the
1481 * transmit holding register is empty. This functionality
1482 * allows an RS485 driver to be written in user space.
1483 *****************************************************************************/
1484 static int get_lsr_info(struct edgeport_port *edge_port,
1485 unsigned int __user *value)
1486 {
1487 unsigned int result = 0;
1488 unsigned long flags;
1489
1490 spin_lock_irqsave(&edge_port->ep_lock, flags);
1491 if (edge_port->maxTxCredits == edge_port->txCredits &&
1492 edge_port->txfifo.count == 0) {
1493 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1494 result = TIOCSER_TEMT;
1495 }
1496 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1497
1498 if (copy_to_user(value, &result, sizeof(int)))
1499 return -EFAULT;
1500 return 0;
1501 }
1502
1503 static int edge_tiocmset(struct tty_struct *tty,
1504 unsigned int set, unsigned int clear)
1505 {
1506 struct usb_serial_port *port = tty->driver_data;
1507 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1508 unsigned int mcr;
1509
1510 mcr = edge_port->shadowMCR;
1511 if (set & TIOCM_RTS)
1512 mcr |= MCR_RTS;
1513 if (set & TIOCM_DTR)
1514 mcr |= MCR_DTR;
1515 if (set & TIOCM_LOOP)
1516 mcr |= MCR_LOOPBACK;
1517
1518 if (clear & TIOCM_RTS)
1519 mcr &= ~MCR_RTS;
1520 if (clear & TIOCM_DTR)
1521 mcr &= ~MCR_DTR;
1522 if (clear & TIOCM_LOOP)
1523 mcr &= ~MCR_LOOPBACK;
1524
1525 edge_port->shadowMCR = mcr;
1526
1527 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1528
1529 return 0;
1530 }
1531
1532 static int edge_tiocmget(struct tty_struct *tty)
1533 {
1534 struct usb_serial_port *port = tty->driver_data;
1535 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1536 unsigned int result = 0;
1537 unsigned int msr;
1538 unsigned int mcr;
1539
1540 msr = edge_port->shadowMSR;
1541 mcr = edge_port->shadowMCR;
1542 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1543 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1544 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1545 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1546 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1547 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1548
1549 return result;
1550 }
1551
1552 static int get_serial_info(struct edgeport_port *edge_port,
1553 struct serial_struct __user *retinfo)
1554 {
1555 struct serial_struct tmp;
1556
1557 memset(&tmp, 0, sizeof(tmp));
1558
1559 tmp.type = PORT_16550A;
1560 tmp.line = edge_port->port->minor;
1561 tmp.port = edge_port->port->port_number;
1562 tmp.irq = 0;
1563 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1564 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1565 tmp.baud_base = 9600;
1566 tmp.close_delay = 5*HZ;
1567 tmp.closing_wait = 30*HZ;
1568
1569 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1570 return -EFAULT;
1571 return 0;
1572 }
1573
1574
1575 /*****************************************************************************
1576 * SerialIoctl
1577 * this function handles any ioctl calls to the driver
1578 *****************************************************************************/
1579 static int edge_ioctl(struct tty_struct *tty,
1580 unsigned int cmd, unsigned long arg)
1581 {
1582 struct usb_serial_port *port = tty->driver_data;
1583 DEFINE_WAIT(wait);
1584 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1585
1586 switch (cmd) {
1587 case TIOCSERGETLSR:
1588 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1589 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1590
1591 case TIOCGSERIAL:
1592 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1593 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1594 }
1595 return -ENOIOCTLCMD;
1596 }
1597
1598
1599 /*****************************************************************************
1600 * SerialBreak
1601 * this function sends a break to the port
1602 *****************************************************************************/
1603 static void edge_break(struct tty_struct *tty, int break_state)
1604 {
1605 struct usb_serial_port *port = tty->driver_data;
1606 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1607 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1608 int status;
1609
1610 if (!edge_serial->is_epic ||
1611 edge_serial->epic_descriptor.Supports.IOSPChase) {
1612 /* flush and chase */
1613 edge_port->chaseResponsePending = true;
1614
1615 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1616 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1617 if (status == 0) {
1618 /* block until chase finished */
1619 block_until_chase_response(edge_port);
1620 } else {
1621 edge_port->chaseResponsePending = false;
1622 }
1623 }
1624
1625 if (!edge_serial->is_epic ||
1626 edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1627 if (break_state == -1) {
1628 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1629 status = send_iosp_ext_cmd(edge_port,
1630 IOSP_CMD_SET_BREAK, 0);
1631 } else {
1632 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1633 status = send_iosp_ext_cmd(edge_port,
1634 IOSP_CMD_CLEAR_BREAK, 0);
1635 }
1636 if (status)
1637 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1638 __func__);
1639 }
1640 }
1641
1642
1643 /*****************************************************************************
1644 * process_rcvd_data
1645 * this function handles the data received on the bulk in pipe.
1646 *****************************************************************************/
1647 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1648 unsigned char *buffer, __u16 bufferLength)
1649 {
1650 struct device *dev = &edge_serial->serial->dev->dev;
1651 struct usb_serial_port *port;
1652 struct edgeport_port *edge_port;
1653 __u16 lastBufferLength;
1654 __u16 rxLen;
1655
1656 lastBufferLength = bufferLength + 1;
1657
1658 while (bufferLength > 0) {
1659 /* failsafe incase we get a message that we don't understand */
1660 if (lastBufferLength == bufferLength) {
1661 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1662 break;
1663 }
1664 lastBufferLength = bufferLength;
1665
1666 switch (edge_serial->rxState) {
1667 case EXPECT_HDR1:
1668 edge_serial->rxHeader1 = *buffer;
1669 ++buffer;
1670 --bufferLength;
1671
1672 if (bufferLength == 0) {
1673 edge_serial->rxState = EXPECT_HDR2;
1674 break;
1675 }
1676 /* otherwise, drop on through */
1677 case EXPECT_HDR2:
1678 edge_serial->rxHeader2 = *buffer;
1679 ++buffer;
1680 --bufferLength;
1681
1682 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1683 edge_serial->rxHeader1, edge_serial->rxHeader2);
1684 /* Process depending on whether this header is
1685 * data or status */
1686
1687 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1688 /* Decode this status header and go to
1689 * EXPECT_HDR1 (if we can process the status
1690 * with only 2 bytes), or go to EXPECT_HDR3 to
1691 * get the third byte. */
1692 edge_serial->rxPort =
1693 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1694 edge_serial->rxStatusCode =
1695 IOSP_GET_STATUS_CODE(
1696 edge_serial->rxHeader1);
1697
1698 if (!IOSP_STATUS_IS_2BYTE(
1699 edge_serial->rxStatusCode)) {
1700 /* This status needs additional bytes.
1701 * Save what we have and then wait for
1702 * more data.
1703 */
1704 edge_serial->rxStatusParam
1705 = edge_serial->rxHeader2;
1706 edge_serial->rxState = EXPECT_HDR3;
1707 break;
1708 }
1709 /* We have all the header bytes, process the
1710 status now */
1711 process_rcvd_status(edge_serial,
1712 edge_serial->rxHeader2, 0);
1713 edge_serial->rxState = EXPECT_HDR1;
1714 break;
1715 } else {
1716 edge_serial->rxPort =
1717 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1718 edge_serial->rxBytesRemaining =
1719 IOSP_GET_HDR_DATA_LEN(
1720 edge_serial->rxHeader1,
1721 edge_serial->rxHeader2);
1722 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1723 __func__,
1724 edge_serial->rxPort,
1725 edge_serial->rxBytesRemaining);
1726
1727 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1728 * ASSERT(DevExt->RxBytesRemaining <
1729 * IOSP_MAX_DATA_LENGTH);
1730 */
1731
1732 if (bufferLength == 0) {
1733 edge_serial->rxState = EXPECT_DATA;
1734 break;
1735 }
1736 /* Else, drop through */
1737 }
1738 case EXPECT_DATA: /* Expect data */
1739 if (bufferLength < edge_serial->rxBytesRemaining) {
1740 rxLen = bufferLength;
1741 /* Expect data to start next buffer */
1742 edge_serial->rxState = EXPECT_DATA;
1743 } else {
1744 /* BufLen >= RxBytesRemaining */
1745 rxLen = edge_serial->rxBytesRemaining;
1746 /* Start another header next time */
1747 edge_serial->rxState = EXPECT_HDR1;
1748 }
1749
1750 bufferLength -= rxLen;
1751 edge_serial->rxBytesRemaining -= rxLen;
1752
1753 /* spit this data back into the tty driver if this
1754 port is open */
1755 if (rxLen) {
1756 port = edge_serial->serial->port[
1757 edge_serial->rxPort];
1758 edge_port = usb_get_serial_port_data(port);
1759 if (edge_port->open) {
1760 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1761 __func__, rxLen,
1762 edge_serial->rxPort);
1763 edge_tty_recv(edge_port->port, buffer,
1764 rxLen);
1765 edge_port->port->icount.rx += rxLen;
1766 }
1767 buffer += rxLen;
1768 }
1769 break;
1770
1771 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1772 edge_serial->rxHeader3 = *buffer;
1773 ++buffer;
1774 --bufferLength;
1775
1776 /* We have all the header bytes, process the
1777 status now */
1778 process_rcvd_status(edge_serial,
1779 edge_serial->rxStatusParam,
1780 edge_serial->rxHeader3);
1781 edge_serial->rxState = EXPECT_HDR1;
1782 break;
1783 }
1784 }
1785 }
1786
1787
1788 /*****************************************************************************
1789 * process_rcvd_status
1790 * this function handles the any status messages received on the
1791 * bulk in pipe.
1792 *****************************************************************************/
1793 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1794 __u8 byte2, __u8 byte3)
1795 {
1796 struct usb_serial_port *port;
1797 struct edgeport_port *edge_port;
1798 struct tty_struct *tty;
1799 struct device *dev;
1800 __u8 code = edge_serial->rxStatusCode;
1801
1802 /* switch the port pointer to the one being currently talked about */
1803 port = edge_serial->serial->port[edge_serial->rxPort];
1804 edge_port = usb_get_serial_port_data(port);
1805 if (edge_port == NULL) {
1806 dev_err(&edge_serial->serial->dev->dev,
1807 "%s - edge_port == NULL for port %d\n",
1808 __func__, edge_serial->rxPort);
1809 return;
1810 }
1811 dev = &port->dev;
1812
1813 if (code == IOSP_EXT_STATUS) {
1814 switch (byte2) {
1815 case IOSP_EXT_STATUS_CHASE_RSP:
1816 /* we want to do EXT status regardless of port
1817 * open/closed */
1818 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1819 __func__, edge_serial->rxPort, byte3);
1820 /* Currently, the only EXT_STATUS is Chase, so process
1821 * here instead of one more call to one more subroutine
1822 * If/when more EXT_STATUS, there'll be more work to do
1823 * Also, we currently clear flag and close the port
1824 * regardless of content of above's Byte3.
1825 * We could choose to do something else when Byte3 says
1826 * Timeout on Chase from Edgeport, like wait longer in
1827 * block_until_chase_response, but for now we don't.
1828 */
1829 edge_port->chaseResponsePending = false;
1830 wake_up(&edge_port->wait_chase);
1831 return;
1832
1833 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1834 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1835 __func__, edge_serial->rxPort, byte3);
1836 /* Port->RxCheckRsp = true; */
1837 return;
1838 }
1839 }
1840
1841 if (code == IOSP_STATUS_OPEN_RSP) {
1842 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1843 edge_port->maxTxCredits = edge_port->txCredits;
1844 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1845 __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1846 handle_new_msr(edge_port, byte2);
1847
1848 /* send the current line settings to the port so we are
1849 in sync with any further termios calls */
1850 tty = tty_port_tty_get(&edge_port->port->port);
1851 if (tty) {
1852 change_port_settings(tty,
1853 edge_port, &tty->termios);
1854 tty_kref_put(tty);
1855 }
1856
1857 /* we have completed the open */
1858 edge_port->openPending = false;
1859 edge_port->open = true;
1860 wake_up(&edge_port->wait_open);
1861 return;
1862 }
1863
1864 /* If port is closed, silently discard all rcvd status. We can
1865 * have cases where buffered status is received AFTER the close
1866 * port command is sent to the Edgeport.
1867 */
1868 if (!edge_port->open || edge_port->closePending)
1869 return;
1870
1871 switch (code) {
1872 /* Not currently sent by Edgeport */
1873 case IOSP_STATUS_LSR:
1874 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1875 __func__, edge_serial->rxPort, byte2);
1876 handle_new_lsr(edge_port, false, byte2, 0);
1877 break;
1878
1879 case IOSP_STATUS_LSR_DATA:
1880 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1881 __func__, edge_serial->rxPort, byte2, byte3);
1882 /* byte2 is LSR Register */
1883 /* byte3 is broken data byte */
1884 handle_new_lsr(edge_port, true, byte2, byte3);
1885 break;
1886 /*
1887 * case IOSP_EXT_4_STATUS:
1888 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1889 * __func__, edge_serial->rxPort, byte2, byte3);
1890 * break;
1891 */
1892 case IOSP_STATUS_MSR:
1893 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1894 __func__, edge_serial->rxPort, byte2);
1895 /*
1896 * Process this new modem status and generate appropriate
1897 * events, etc, based on the new status. This routine
1898 * also saves the MSR in Port->ShadowMsr.
1899 */
1900 handle_new_msr(edge_port, byte2);
1901 break;
1902
1903 default:
1904 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1905 break;
1906 }
1907 }
1908
1909
1910 /*****************************************************************************
1911 * edge_tty_recv
1912 * this function passes data on to the tty flip buffer
1913 *****************************************************************************/
1914 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1915 int length)
1916 {
1917 int cnt;
1918
1919 cnt = tty_insert_flip_string(&port->port, data, length);
1920 if (cnt < length) {
1921 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1922 __func__, length - cnt);
1923 }
1924 data += cnt;
1925 length -= cnt;
1926
1927 tty_flip_buffer_push(&port->port);
1928 }
1929
1930
1931 /*****************************************************************************
1932 * handle_new_msr
1933 * this function handles any change to the msr register for a port.
1934 *****************************************************************************/
1935 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1936 {
1937 struct async_icount *icount;
1938
1939 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1940 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1941 icount = &edge_port->port->icount;
1942
1943 /* update input line counters */
1944 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1945 icount->cts++;
1946 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1947 icount->dsr++;
1948 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1949 icount->dcd++;
1950 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1951 icount->rng++;
1952 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1953 }
1954
1955 /* Save the new modem status */
1956 edge_port->shadowMSR = newMsr & 0xf0;
1957 }
1958
1959
1960 /*****************************************************************************
1961 * handle_new_lsr
1962 * this function handles any change to the lsr register for a port.
1963 *****************************************************************************/
1964 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1965 __u8 lsr, __u8 data)
1966 {
1967 __u8 newLsr = (__u8) (lsr & (__u8)
1968 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1969 struct async_icount *icount;
1970
1971 edge_port->shadowLSR = lsr;
1972
1973 if (newLsr & LSR_BREAK) {
1974 /*
1975 * Parity and Framing errors only count if they
1976 * occur exclusive of a break being
1977 * received.
1978 */
1979 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1980 }
1981
1982 /* Place LSR data byte into Rx buffer */
1983 if (lsrData)
1984 edge_tty_recv(edge_port->port, &data, 1);
1985
1986 /* update input line counters */
1987 icount = &edge_port->port->icount;
1988 if (newLsr & LSR_BREAK)
1989 icount->brk++;
1990 if (newLsr & LSR_OVER_ERR)
1991 icount->overrun++;
1992 if (newLsr & LSR_PAR_ERR)
1993 icount->parity++;
1994 if (newLsr & LSR_FRM_ERR)
1995 icount->frame++;
1996 }
1997
1998
1999 /****************************************************************************
2000 * sram_write
2001 * writes a number of bytes to the Edgeport device's sram starting at the
2002 * given address.
2003 * If successful returns the number of bytes written, otherwise it returns
2004 * a negative error number of the problem.
2005 ****************************************************************************/
2006 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2007 __u16 length, const __u8 *data)
2008 {
2009 int result;
2010 __u16 current_length;
2011 unsigned char *transfer_buffer;
2012
2013 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2014
2015 transfer_buffer = kmalloc(64, GFP_KERNEL);
2016 if (!transfer_buffer)
2017 return -ENOMEM;
2018
2019 /* need to split these writes up into 64 byte chunks */
2020 result = 0;
2021 while (length > 0) {
2022 if (length > 64)
2023 current_length = 64;
2024 else
2025 current_length = length;
2026
2027 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2028 memcpy(transfer_buffer, data, current_length);
2029 result = usb_control_msg(serial->dev,
2030 usb_sndctrlpipe(serial->dev, 0),
2031 USB_REQUEST_ION_WRITE_RAM,
2032 0x40, addr, extAddr, transfer_buffer,
2033 current_length, 300);
2034 if (result < 0)
2035 break;
2036 length -= current_length;
2037 addr += current_length;
2038 data += current_length;
2039 }
2040
2041 kfree(transfer_buffer);
2042 return result;
2043 }
2044
2045
2046 /****************************************************************************
2047 * rom_write
2048 * writes a number of bytes to the Edgeport device's ROM starting at the
2049 * given address.
2050 * If successful returns the number of bytes written, otherwise it returns
2051 * a negative error number of the problem.
2052 ****************************************************************************/
2053 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2054 __u16 length, const __u8 *data)
2055 {
2056 int result;
2057 __u16 current_length;
2058 unsigned char *transfer_buffer;
2059
2060 transfer_buffer = kmalloc(64, GFP_KERNEL);
2061 if (!transfer_buffer)
2062 return -ENOMEM;
2063
2064 /* need to split these writes up into 64 byte chunks */
2065 result = 0;
2066 while (length > 0) {
2067 if (length > 64)
2068 current_length = 64;
2069 else
2070 current_length = length;
2071 memcpy(transfer_buffer, data, current_length);
2072 result = usb_control_msg(serial->dev,
2073 usb_sndctrlpipe(serial->dev, 0),
2074 USB_REQUEST_ION_WRITE_ROM, 0x40,
2075 addr, extAddr,
2076 transfer_buffer, current_length, 300);
2077 if (result < 0)
2078 break;
2079 length -= current_length;
2080 addr += current_length;
2081 data += current_length;
2082 }
2083
2084 kfree(transfer_buffer);
2085 return result;
2086 }
2087
2088
2089 /****************************************************************************
2090 * rom_read
2091 * reads a number of bytes from the Edgeport device starting at the given
2092 * address.
2093 * If successful returns the number of bytes read, otherwise it returns
2094 * a negative error number of the problem.
2095 ****************************************************************************/
2096 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2097 __u16 addr, __u16 length, __u8 *data)
2098 {
2099 int result;
2100 __u16 current_length;
2101 unsigned char *transfer_buffer;
2102
2103 transfer_buffer = kmalloc(64, GFP_KERNEL);
2104 if (!transfer_buffer)
2105 return -ENOMEM;
2106
2107 /* need to split these reads up into 64 byte chunks */
2108 result = 0;
2109 while (length > 0) {
2110 if (length > 64)
2111 current_length = 64;
2112 else
2113 current_length = length;
2114 result = usb_control_msg(serial->dev,
2115 usb_rcvctrlpipe(serial->dev, 0),
2116 USB_REQUEST_ION_READ_ROM,
2117 0xC0, addr, extAddr, transfer_buffer,
2118 current_length, 300);
2119 if (result < 0)
2120 break;
2121 memcpy(data, transfer_buffer, current_length);
2122 length -= current_length;
2123 addr += current_length;
2124 data += current_length;
2125 }
2126
2127 kfree(transfer_buffer);
2128 return result;
2129 }
2130
2131
2132 /****************************************************************************
2133 * send_iosp_ext_cmd
2134 * Is used to send a IOSP message to the Edgeport device
2135 ****************************************************************************/
2136 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2137 __u8 command, __u8 param)
2138 {
2139 unsigned char *buffer;
2140 unsigned char *currentCommand;
2141 int length = 0;
2142 int status = 0;
2143
2144 buffer = kmalloc(10, GFP_ATOMIC);
2145 if (!buffer)
2146 return -ENOMEM;
2147
2148 currentCommand = buffer;
2149
2150 MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2151 command, param);
2152
2153 status = write_cmd_usb(edge_port, buffer, length);
2154 if (status) {
2155 /* something bad happened, let's free up the memory */
2156 kfree(buffer);
2157 }
2158
2159 return status;
2160 }
2161
2162
2163 /*****************************************************************************
2164 * write_cmd_usb
2165 * this function writes the given buffer out to the bulk write endpoint.
2166 *****************************************************************************/
2167 static int write_cmd_usb(struct edgeport_port *edge_port,
2168 unsigned char *buffer, int length)
2169 {
2170 struct edgeport_serial *edge_serial =
2171 usb_get_serial_data(edge_port->port->serial);
2172 struct device *dev = &edge_port->port->dev;
2173 int status = 0;
2174 struct urb *urb;
2175
2176 usb_serial_debug_data(dev, __func__, length, buffer);
2177
2178 /* Allocate our next urb */
2179 urb = usb_alloc_urb(0, GFP_ATOMIC);
2180 if (!urb)
2181 return -ENOMEM;
2182
2183 atomic_inc(&CmdUrbs);
2184 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2185 __func__, urb, atomic_read(&CmdUrbs));
2186
2187 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2188 usb_sndbulkpipe(edge_serial->serial->dev,
2189 edge_serial->bulk_out_endpoint),
2190 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2191
2192 edge_port->commandPending = true;
2193 status = usb_submit_urb(urb, GFP_ATOMIC);
2194
2195 if (status) {
2196 /* something went wrong */
2197 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2198 __func__, status);
2199 usb_kill_urb(urb);
2200 usb_free_urb(urb);
2201 atomic_dec(&CmdUrbs);
2202 return status;
2203 }
2204
2205 #if 0
2206 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2207
2208 if (edge_port->commandPending) {
2209 /* command timed out */
2210 dev_dbg(dev, "%s - command timed out\n", __func__);
2211 status = -EINVAL;
2212 }
2213 #endif
2214 return status;
2215 }
2216
2217
2218 /*****************************************************************************
2219 * send_cmd_write_baud_rate
2220 * this function sends the proper command to change the baud rate of the
2221 * specified port.
2222 *****************************************************************************/
2223 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2224 int baudRate)
2225 {
2226 struct edgeport_serial *edge_serial =
2227 usb_get_serial_data(edge_port->port->serial);
2228 struct device *dev = &edge_port->port->dev;
2229 unsigned char *cmdBuffer;
2230 unsigned char *currCmd;
2231 int cmdLen = 0;
2232 int divisor;
2233 int status;
2234 u32 number = edge_port->port->port_number;
2235
2236 if (edge_serial->is_epic &&
2237 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2238 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2239 baudRate);
2240 return 0;
2241 }
2242
2243 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2244
2245 status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2246 if (status) {
2247 dev_err(dev, "%s - bad baud rate\n", __func__);
2248 return status;
2249 }
2250
2251 /* Alloc memory for the string of commands. */
2252 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2253 if (!cmdBuffer)
2254 return -ENOMEM;
2255
2256 currCmd = cmdBuffer;
2257
2258 /* Enable access to divisor latch */
2259 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2260
2261 /* Write the divisor itself */
2262 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2263 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2264
2265 /* Restore original value to disable access to divisor latch */
2266 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2267 edge_port->shadowLCR);
2268
2269 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2270 if (status) {
2271 /* something bad happened, let's free up the memory */
2272 kfree(cmdBuffer);
2273 }
2274
2275 return status;
2276 }
2277
2278
2279 /*****************************************************************************
2280 * calc_baud_rate_divisor
2281 * this function calculates the proper baud rate divisor for the specified
2282 * baud rate.
2283 *****************************************************************************/
2284 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2285 {
2286 int i;
2287 __u16 custom;
2288
2289 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2290 if (divisor_table[i].BaudRate == baudrate) {
2291 *divisor = divisor_table[i].Divisor;
2292 return 0;
2293 }
2294 }
2295
2296 /* We have tried all of the standard baud rates
2297 * lets try to calculate the divisor for this baud rate
2298 * Make sure the baud rate is reasonable */
2299 if (baudrate > 50 && baudrate < 230400) {
2300 /* get divisor */
2301 custom = (__u16)((230400L + baudrate/2) / baudrate);
2302
2303 *divisor = custom;
2304
2305 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2306 return 0;
2307 }
2308
2309 return -1;
2310 }
2311
2312
2313 /*****************************************************************************
2314 * send_cmd_write_uart_register
2315 * this function builds up a uart register message and sends to the device.
2316 *****************************************************************************/
2317 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2318 __u8 regNum, __u8 regValue)
2319 {
2320 struct edgeport_serial *edge_serial =
2321 usb_get_serial_data(edge_port->port->serial);
2322 struct device *dev = &edge_port->port->dev;
2323 unsigned char *cmdBuffer;
2324 unsigned char *currCmd;
2325 unsigned long cmdLen = 0;
2326 int status;
2327
2328 dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2329 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2330
2331 if (edge_serial->is_epic &&
2332 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2333 regNum == MCR) {
2334 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2335 return 0;
2336 }
2337
2338 if (edge_serial->is_epic &&
2339 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2340 regNum == LCR) {
2341 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2342 return 0;
2343 }
2344
2345 /* Alloc memory for the string of commands. */
2346 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2347 if (cmdBuffer == NULL)
2348 return -ENOMEM;
2349
2350 currCmd = cmdBuffer;
2351
2352 /* Build a cmd in the buffer to write the given register */
2353 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2354 regNum, regValue);
2355
2356 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2357 if (status) {
2358 /* something bad happened, let's free up the memory */
2359 kfree(cmdBuffer);
2360 }
2361
2362 return status;
2363 }
2364
2365
2366 /*****************************************************************************
2367 * change_port_settings
2368 * This routine is called to set the UART on the device to match the
2369 * specified new settings.
2370 *****************************************************************************/
2371
2372 static void change_port_settings(struct tty_struct *tty,
2373 struct edgeport_port *edge_port, struct ktermios *old_termios)
2374 {
2375 struct device *dev = &edge_port->port->dev;
2376 struct edgeport_serial *edge_serial =
2377 usb_get_serial_data(edge_port->port->serial);
2378 int baud;
2379 unsigned cflag;
2380 __u8 mask = 0xff;
2381 __u8 lData;
2382 __u8 lParity;
2383 __u8 lStop;
2384 __u8 rxFlow;
2385 __u8 txFlow;
2386 int status;
2387
2388 if (!edge_port->open &&
2389 !edge_port->openPending) {
2390 dev_dbg(dev, "%s - port not opened\n", __func__);
2391 return;
2392 }
2393
2394 cflag = tty->termios.c_cflag;
2395
2396 switch (cflag & CSIZE) {
2397 case CS5:
2398 lData = LCR_BITS_5; mask = 0x1f;
2399 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2400 break;
2401 case CS6:
2402 lData = LCR_BITS_6; mask = 0x3f;
2403 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2404 break;
2405 case CS7:
2406 lData = LCR_BITS_7; mask = 0x7f;
2407 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2408 break;
2409 default:
2410 case CS8:
2411 lData = LCR_BITS_8;
2412 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2413 break;
2414 }
2415
2416 lParity = LCR_PAR_NONE;
2417 if (cflag & PARENB) {
2418 if (cflag & CMSPAR) {
2419 if (cflag & PARODD) {
2420 lParity = LCR_PAR_MARK;
2421 dev_dbg(dev, "%s - parity = mark\n", __func__);
2422 } else {
2423 lParity = LCR_PAR_SPACE;
2424 dev_dbg(dev, "%s - parity = space\n", __func__);
2425 }
2426 } else if (cflag & PARODD) {
2427 lParity = LCR_PAR_ODD;
2428 dev_dbg(dev, "%s - parity = odd\n", __func__);
2429 } else {
2430 lParity = LCR_PAR_EVEN;
2431 dev_dbg(dev, "%s - parity = even\n", __func__);
2432 }
2433 } else {
2434 dev_dbg(dev, "%s - parity = none\n", __func__);
2435 }
2436
2437 if (cflag & CSTOPB) {
2438 lStop = LCR_STOP_2;
2439 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2440 } else {
2441 lStop = LCR_STOP_1;
2442 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2443 }
2444
2445 /* figure out the flow control settings */
2446 rxFlow = txFlow = 0x00;
2447 if (cflag & CRTSCTS) {
2448 rxFlow |= IOSP_RX_FLOW_RTS;
2449 txFlow |= IOSP_TX_FLOW_CTS;
2450 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2451 } else {
2452 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2453 }
2454
2455 /* if we are implementing XON/XOFF, set the start and stop character
2456 in the device */
2457 if (I_IXOFF(tty) || I_IXON(tty)) {
2458 unsigned char stop_char = STOP_CHAR(tty);
2459 unsigned char start_char = START_CHAR(tty);
2460
2461 if (!edge_serial->is_epic ||
2462 edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2463 send_iosp_ext_cmd(edge_port,
2464 IOSP_CMD_SET_XON_CHAR, start_char);
2465 send_iosp_ext_cmd(edge_port,
2466 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2467 }
2468
2469 /* if we are implementing INBOUND XON/XOFF */
2470 if (I_IXOFF(tty)) {
2471 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2472 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2473 __func__, start_char, stop_char);
2474 } else {
2475 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2476 }
2477
2478 /* if we are implementing OUTBOUND XON/XOFF */
2479 if (I_IXON(tty)) {
2480 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2481 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2482 __func__, start_char, stop_char);
2483 } else {
2484 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2485 }
2486 }
2487
2488 /* Set flow control to the configured value */
2489 if (!edge_serial->is_epic ||
2490 edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2491 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2492 if (!edge_serial->is_epic ||
2493 edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2494 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2495
2496
2497 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2498 edge_port->shadowLCR |= (lData | lParity | lStop);
2499
2500 edge_port->validDataMask = mask;
2501
2502 /* Send the updated LCR value to the EdgePort */
2503 status = send_cmd_write_uart_register(edge_port, LCR,
2504 edge_port->shadowLCR);
2505 if (status != 0)
2506 return;
2507
2508 /* set up the MCR register and send it to the EdgePort */
2509 edge_port->shadowMCR = MCR_MASTER_IE;
2510 if (cflag & CBAUD)
2511 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2512
2513 status = send_cmd_write_uart_register(edge_port, MCR,
2514 edge_port->shadowMCR);
2515 if (status != 0)
2516 return;
2517
2518 /* Determine divisor based on baud rate */
2519 baud = tty_get_baud_rate(tty);
2520 if (!baud) {
2521 /* pick a default, any default... */
2522 baud = 9600;
2523 }
2524
2525 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2526 status = send_cmd_write_baud_rate(edge_port, baud);
2527 if (status == -1) {
2528 /* Speed change was not possible - put back the old speed */
2529 baud = tty_termios_baud_rate(old_termios);
2530 tty_encode_baud_rate(tty, baud, baud);
2531 }
2532 }
2533
2534
2535 /****************************************************************************
2536 * unicode_to_ascii
2537 * Turns a string from Unicode into ASCII.
2538 * Doesn't do a good job with any characters that are outside the normal
2539 * ASCII range, but it's only for debugging...
2540 * NOTE: expects the unicode in LE format
2541 ****************************************************************************/
2542 static void unicode_to_ascii(char *string, int buflen,
2543 __le16 *unicode, int unicode_size)
2544 {
2545 int i;
2546
2547 if (buflen <= 0) /* never happens, but... */
2548 return;
2549 --buflen; /* space for nul */
2550
2551 for (i = 0; i < unicode_size; i++) {
2552 if (i >= buflen)
2553 break;
2554 string[i] = (char)(le16_to_cpu(unicode[i]));
2555 }
2556 string[i] = 0x00;
2557 }
2558
2559
2560 /****************************************************************************
2561 * get_manufacturing_desc
2562 * reads in the manufacturing descriptor and stores it into the serial
2563 * structure.
2564 ****************************************************************************/
2565 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2566 {
2567 struct device *dev = &edge_serial->serial->dev->dev;
2568 int response;
2569
2570 dev_dbg(dev, "getting manufacturer descriptor\n");
2571
2572 response = rom_read(edge_serial->serial,
2573 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2574 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2575 EDGE_MANUF_DESC_LEN,
2576 (__u8 *)(&edge_serial->manuf_descriptor));
2577
2578 if (response < 1)
2579 dev_err(dev, "error in getting manufacturer descriptor\n");
2580 else {
2581 char string[30];
2582 dev_dbg(dev, "**Manufacturer Descriptor\n");
2583 dev_dbg(dev, " RomSize: %dK\n",
2584 edge_serial->manuf_descriptor.RomSize);
2585 dev_dbg(dev, " RamSize: %dK\n",
2586 edge_serial->manuf_descriptor.RamSize);
2587 dev_dbg(dev, " CpuRev: %d\n",
2588 edge_serial->manuf_descriptor.CpuRev);
2589 dev_dbg(dev, " BoardRev: %d\n",
2590 edge_serial->manuf_descriptor.BoardRev);
2591 dev_dbg(dev, " NumPorts: %d\n",
2592 edge_serial->manuf_descriptor.NumPorts);
2593 dev_dbg(dev, " DescDate: %d/%d/%d\n",
2594 edge_serial->manuf_descriptor.DescDate[0],
2595 edge_serial->manuf_descriptor.DescDate[1],
2596 edge_serial->manuf_descriptor.DescDate[2]+1900);
2597 unicode_to_ascii(string, sizeof(string),
2598 edge_serial->manuf_descriptor.SerialNumber,
2599 edge_serial->manuf_descriptor.SerNumLength/2);
2600 dev_dbg(dev, " SerialNumber: %s\n", string);
2601 unicode_to_ascii(string, sizeof(string),
2602 edge_serial->manuf_descriptor.AssemblyNumber,
2603 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2604 dev_dbg(dev, " AssemblyNumber: %s\n", string);
2605 unicode_to_ascii(string, sizeof(string),
2606 edge_serial->manuf_descriptor.OemAssyNumber,
2607 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2608 dev_dbg(dev, " OemAssyNumber: %s\n", string);
2609 dev_dbg(dev, " UartType: %d\n",
2610 edge_serial->manuf_descriptor.UartType);
2611 dev_dbg(dev, " IonPid: %d\n",
2612 edge_serial->manuf_descriptor.IonPid);
2613 dev_dbg(dev, " IonConfig: %d\n",
2614 edge_serial->manuf_descriptor.IonConfig);
2615 }
2616 }
2617
2618
2619 /****************************************************************************
2620 * get_boot_desc
2621 * reads in the bootloader descriptor and stores it into the serial
2622 * structure.
2623 ****************************************************************************/
2624 static void get_boot_desc(struct edgeport_serial *edge_serial)
2625 {
2626 struct device *dev = &edge_serial->serial->dev->dev;
2627 int response;
2628
2629 dev_dbg(dev, "getting boot descriptor\n");
2630
2631 response = rom_read(edge_serial->serial,
2632 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2633 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2634 EDGE_BOOT_DESC_LEN,
2635 (__u8 *)(&edge_serial->boot_descriptor));
2636
2637 if (response < 1)
2638 dev_err(dev, "error in getting boot descriptor\n");
2639 else {
2640 dev_dbg(dev, "**Boot Descriptor:\n");
2641 dev_dbg(dev, " BootCodeLength: %d\n",
2642 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2643 dev_dbg(dev, " MajorVersion: %d\n",
2644 edge_serial->boot_descriptor.MajorVersion);
2645 dev_dbg(dev, " MinorVersion: %d\n",
2646 edge_serial->boot_descriptor.MinorVersion);
2647 dev_dbg(dev, " BuildNumber: %d\n",
2648 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2649 dev_dbg(dev, " Capabilities: 0x%x\n",
2650 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2651 dev_dbg(dev, " UConfig0: %d\n",
2652 edge_serial->boot_descriptor.UConfig0);
2653 dev_dbg(dev, " UConfig1: %d\n",
2654 edge_serial->boot_descriptor.UConfig1);
2655 }
2656 }
2657
2658
2659 /****************************************************************************
2660 * load_application_firmware
2661 * This is called to load the application firmware to the device
2662 ****************************************************************************/
2663 static void load_application_firmware(struct edgeport_serial *edge_serial)
2664 {
2665 struct device *dev = &edge_serial->serial->dev->dev;
2666 const struct ihex_binrec *rec;
2667 const struct firmware *fw;
2668 const char *fw_name;
2669 const char *fw_info;
2670 int response;
2671 __u32 Operaddr;
2672 __u16 build;
2673
2674 switch (edge_serial->product_info.iDownloadFile) {
2675 case EDGE_DOWNLOAD_FILE_I930:
2676 fw_info = "downloading firmware version (930)";
2677 fw_name = "edgeport/down.fw";
2678 break;
2679
2680 case EDGE_DOWNLOAD_FILE_80251:
2681 fw_info = "downloading firmware version (80251)";
2682 fw_name = "edgeport/down2.fw";
2683 break;
2684
2685 case EDGE_DOWNLOAD_FILE_NONE:
2686 dev_dbg(dev, "No download file specified, skipping download\n");
2687 return;
2688
2689 default:
2690 return;
2691 }
2692
2693 response = request_ihex_firmware(&fw, fw_name,
2694 &edge_serial->serial->dev->dev);
2695 if (response) {
2696 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2697 fw_name, response);
2698 return;
2699 }
2700
2701 rec = (const struct ihex_binrec *)fw->data;
2702 build = (rec->data[2] << 8) | rec->data[3];
2703
2704 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2705
2706 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2707 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2708 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2709
2710 for (rec = ihex_next_binrec(rec); rec;
2711 rec = ihex_next_binrec(rec)) {
2712 Operaddr = be32_to_cpu(rec->addr);
2713 response = sram_write(edge_serial->serial,
2714 Operaddr >> 16,
2715 Operaddr & 0xFFFF,
2716 be16_to_cpu(rec->len),
2717 &rec->data[0]);
2718 if (response < 0) {
2719 dev_err(&edge_serial->serial->dev->dev,
2720 "sram_write failed (%x, %x, %d)\n",
2721 Operaddr >> 16, Operaddr & 0xFFFF,
2722 be16_to_cpu(rec->len));
2723 break;
2724 }
2725 }
2726
2727 dev_dbg(dev, "sending exec_dl_code\n");
2728 response = usb_control_msg (edge_serial->serial->dev,
2729 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2730 USB_REQUEST_ION_EXEC_DL_CODE,
2731 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2732
2733 release_firmware(fw);
2734 }
2735
2736
2737 /****************************************************************************
2738 * edge_startup
2739 ****************************************************************************/
2740 static int edge_startup(struct usb_serial *serial)
2741 {
2742 struct edgeport_serial *edge_serial;
2743 struct usb_device *dev;
2744 struct device *ddev = &serial->dev->dev;
2745 int i;
2746 int response;
2747 bool interrupt_in_found;
2748 bool bulk_in_found;
2749 bool bulk_out_found;
2750 static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2751 EDGE_COMPATIBILITY_MASK1,
2752 EDGE_COMPATIBILITY_MASK2 };
2753
2754 if (serial->num_bulk_in < 1 || serial->num_interrupt_in < 1) {
2755 dev_err(&serial->interface->dev, "missing endpoints\n");
2756 return -ENODEV;
2757 }
2758
2759 dev = serial->dev;
2760
2761 /* create our private serial structure */
2762 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2763 if (!edge_serial)
2764 return -ENOMEM;
2765
2766 spin_lock_init(&edge_serial->es_lock);
2767 edge_serial->serial = serial;
2768 usb_set_serial_data(serial, edge_serial);
2769
2770 /* get the name for the device from the device */
2771 i = usb_string(dev, dev->descriptor.iManufacturer,
2772 &edge_serial->name[0], MAX_NAME_LEN+1);
2773 if (i < 0)
2774 i = 0;
2775 edge_serial->name[i++] = ' ';
2776 usb_string(dev, dev->descriptor.iProduct,
2777 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2778
2779 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2780
2781 /* Read the epic descriptor */
2782 if (get_epic_descriptor(edge_serial) <= 0) {
2783 /* memcpy descriptor to Supports structures */
2784 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2785 sizeof(struct edge_compatibility_bits));
2786
2787 /* get the manufacturing descriptor for this device */
2788 get_manufacturing_desc(edge_serial);
2789
2790 /* get the boot descriptor */
2791 get_boot_desc(edge_serial);
2792
2793 get_product_info(edge_serial);
2794 }
2795
2796 /* set the number of ports from the manufacturing description */
2797 /* serial->num_ports = serial->product_info.NumPorts; */
2798 if ((!edge_serial->is_epic) &&
2799 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2800 dev_warn(ddev,
2801 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2802 edge_serial->product_info.NumPorts,
2803 serial->num_ports);
2804 }
2805
2806 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2807
2808 /* If not an EPiC device */
2809 if (!edge_serial->is_epic) {
2810 /* now load the application firmware into this device */
2811 load_application_firmware(edge_serial);
2812
2813 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2814
2815 /* Check current Edgeport EEPROM and update if necessary */
2816 update_edgeport_E2PROM(edge_serial);
2817
2818 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2819
2820 /* set the configuration to use #1 */
2821 /* dev_dbg(ddev, "set_configuration 1\n"); */
2822 /* usb_set_configuration (dev, 1); */
2823 }
2824 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n",
2825 edge_serial->product_info.FirmwareMajorVersion,
2826 edge_serial->product_info.FirmwareMinorVersion,
2827 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2828
2829 /* we set up the pointers to the endpoints in the edge_open function,
2830 * as the structures aren't created yet. */
2831
2832 response = 0;
2833
2834 if (edge_serial->is_epic) {
2835 /* EPIC thing, set up our interrupt polling now and our read
2836 * urb, so that the device knows it really is connected. */
2837 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2838 for (i = 0; i < serial->interface->altsetting[0]
2839 .desc.bNumEndpoints; ++i) {
2840 struct usb_endpoint_descriptor *endpoint;
2841 int buffer_size;
2842
2843 endpoint = &serial->interface->altsetting[0].
2844 endpoint[i].desc;
2845 buffer_size = usb_endpoint_maxp(endpoint);
2846 if (!interrupt_in_found &&
2847 (usb_endpoint_is_int_in(endpoint))) {
2848 /* we found a interrupt in endpoint */
2849 dev_dbg(ddev, "found interrupt in\n");
2850
2851 /* not set up yet, so do it now */
2852 edge_serial->interrupt_read_urb =
2853 usb_alloc_urb(0, GFP_KERNEL);
2854 if (!edge_serial->interrupt_read_urb) {
2855 response = -ENOMEM;
2856 break;
2857 }
2858
2859 edge_serial->interrupt_in_buffer =
2860 kmalloc(buffer_size, GFP_KERNEL);
2861 if (!edge_serial->interrupt_in_buffer) {
2862 response = -ENOMEM;
2863 break;
2864 }
2865 edge_serial->interrupt_in_endpoint =
2866 endpoint->bEndpointAddress;
2867
2868 /* set up our interrupt urb */
2869 usb_fill_int_urb(
2870 edge_serial->interrupt_read_urb,
2871 dev,
2872 usb_rcvintpipe(dev,
2873 endpoint->bEndpointAddress),
2874 edge_serial->interrupt_in_buffer,
2875 buffer_size,
2876 edge_interrupt_callback,
2877 edge_serial,
2878 endpoint->bInterval);
2879
2880 interrupt_in_found = true;
2881 }
2882
2883 if (!bulk_in_found &&
2884 (usb_endpoint_is_bulk_in(endpoint))) {
2885 /* we found a bulk in endpoint */
2886 dev_dbg(ddev, "found bulk in\n");
2887
2888 /* not set up yet, so do it now */
2889 edge_serial->read_urb =
2890 usb_alloc_urb(0, GFP_KERNEL);
2891 if (!edge_serial->read_urb) {
2892 response = -ENOMEM;
2893 break;
2894 }
2895
2896 edge_serial->bulk_in_buffer =
2897 kmalloc(buffer_size, GFP_KERNEL);
2898 if (!edge_serial->bulk_in_buffer) {
2899 response = -ENOMEM;
2900 break;
2901 }
2902 edge_serial->bulk_in_endpoint =
2903 endpoint->bEndpointAddress;
2904
2905 /* set up our bulk in urb */
2906 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2907 usb_rcvbulkpipe(dev,
2908 endpoint->bEndpointAddress),
2909 edge_serial->bulk_in_buffer,
2910 usb_endpoint_maxp(endpoint),
2911 edge_bulk_in_callback,
2912 edge_serial);
2913 bulk_in_found = true;
2914 }
2915
2916 if (!bulk_out_found &&
2917 (usb_endpoint_is_bulk_out(endpoint))) {
2918 /* we found a bulk out endpoint */
2919 dev_dbg(ddev, "found bulk out\n");
2920 edge_serial->bulk_out_endpoint =
2921 endpoint->bEndpointAddress;
2922 bulk_out_found = true;
2923 }
2924 }
2925
2926 if (response || !interrupt_in_found || !bulk_in_found ||
2927 !bulk_out_found) {
2928 if (!response) {
2929 dev_err(ddev, "expected endpoints not found\n");
2930 response = -ENODEV;
2931 }
2932
2933 usb_free_urb(edge_serial->interrupt_read_urb);
2934 kfree(edge_serial->interrupt_in_buffer);
2935
2936 usb_free_urb(edge_serial->read_urb);
2937 kfree(edge_serial->bulk_in_buffer);
2938
2939 kfree(edge_serial);
2940
2941 return response;
2942 }
2943
2944 /* start interrupt read for this edgeport this interrupt will
2945 * continue as long as the edgeport is connected */
2946 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2947 GFP_KERNEL);
2948 if (response)
2949 dev_err(ddev, "%s - Error %d submitting control urb\n",
2950 __func__, response);
2951 }
2952 return response;
2953 }
2954
2955
2956 /****************************************************************************
2957 * edge_disconnect
2958 * This function is called whenever the device is removed from the usb bus.
2959 ****************************************************************************/
2960 static void edge_disconnect(struct usb_serial *serial)
2961 {
2962 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2963
2964 if (edge_serial->is_epic) {
2965 usb_kill_urb(edge_serial->interrupt_read_urb);
2966 usb_kill_urb(edge_serial->read_urb);
2967 }
2968 }
2969
2970
2971 /****************************************************************************
2972 * edge_release
2973 * This function is called when the device structure is deallocated.
2974 ****************************************************************************/
2975 static void edge_release(struct usb_serial *serial)
2976 {
2977 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2978
2979 if (edge_serial->is_epic) {
2980 usb_kill_urb(edge_serial->interrupt_read_urb);
2981 usb_free_urb(edge_serial->interrupt_read_urb);
2982 kfree(edge_serial->interrupt_in_buffer);
2983
2984 usb_kill_urb(edge_serial->read_urb);
2985 usb_free_urb(edge_serial->read_urb);
2986 kfree(edge_serial->bulk_in_buffer);
2987 }
2988
2989 kfree(edge_serial);
2990 }
2991
2992 static int edge_port_probe(struct usb_serial_port *port)
2993 {
2994 struct edgeport_port *edge_port;
2995
2996 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2997 if (!edge_port)
2998 return -ENOMEM;
2999
3000 spin_lock_init(&edge_port->ep_lock);
3001 edge_port->port = port;
3002
3003 usb_set_serial_port_data(port, edge_port);
3004
3005 return 0;
3006 }
3007
3008 static int edge_port_remove(struct usb_serial_port *port)
3009 {
3010 struct edgeport_port *edge_port;
3011
3012 edge_port = usb_get_serial_port_data(port);
3013 kfree(edge_port);
3014
3015 return 0;
3016 }
3017
3018 module_usb_serial_driver(serial_drivers, id_table_combined);
3019
3020 MODULE_AUTHOR(DRIVER_AUTHOR);
3021 MODULE_DESCRIPTION(DRIVER_DESC);
3022 MODULE_LICENSE("GPL");
3023 MODULE_FIRMWARE("edgeport/boot.fw");
3024 MODULE_FIRMWARE("edgeport/boot2.fw");
3025 MODULE_FIRMWARE("edgeport/down.fw");
3026 MODULE_FIRMWARE("edgeport/down2.fw");
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