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