1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * Edgeport/4
14 * Edgeport/4t
15 * Edgeport/2
16 * Edgeport/4i
17 * Edgeport/2i
18 * Edgeport/421
19 * Edgeport/21
20 * Rapidport/4
21 * Edgeport/8
22 * Edgeport/2D8
23 * Edgeport/4D8
24 * Edgeport/8i
25 *
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
29 *
30 */
31
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/slab.h>
36 #include <linux/tty.h>
37 #include <linux/tty_driver.h>
38 #include <linux/tty_flip.h>
39 #include <linux/module.h>
40 #include <linux/spinlock.h>
41 #include <linux/serial.h>
42 #include <linux/ioctl.h>
43 #include <linux/wait.h>
44 #include <linux/firmware.h>
45 #include <linux/ihex.h>
46 #include <linux/uaccess.h>
47 #include <linux/usb.h>
48 #include <linux/usb/serial.h>
49 #include "io_edgeport.h"
50 #include "io_ionsp.h" /* info for the iosp messages */
51 #include "io_16654.h" /* 16654 UART defines */
52
53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
54 #define DRIVER_DESC "Edgeport USB Serial Driver"
55
56 #define MAX_NAME_LEN 64
57
58 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
59
60 static const struct usb_device_id edgeport_2port_id_table[] = {
61 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
62 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
63 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
64 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
65 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
66 { }
67 };
68
69 static const struct usb_device_id edgeport_4port_id_table[] = {
70 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
71 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
72 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
73 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
74 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
75 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
76 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
77 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
78 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
79 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
80 { }
81 };
82
83 static const struct usb_device_id edgeport_8port_id_table[] = {
84 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
85 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
86 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
87 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
88 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
89 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
90 { }
91 };
92
93 static const struct usb_device_id Epic_port_id_table[] = {
94 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
95 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
96 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
97 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
98 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
99 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
100 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
101 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
102 { }
103 };
104
105 /* Devices that this driver supports */
106 static const struct usb_device_id id_table_combined[] = {
107 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
108 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
109 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
110 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
111 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
112 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
113 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
114 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
115 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
116 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
117 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
118 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
119 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
120 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
121 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
122 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
123 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
124 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
125 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
126 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
127 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
128 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
129 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
130 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
131 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
132 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
133 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
134 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
135 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
136 { } /* Terminating entry */
137 };
138
139 MODULE_DEVICE_TABLE(usb, id_table_combined);
140
141
142 /* receive port state */
143 enum RXSTATE {
144 EXPECT_HDR1 = 0, /* Expect header byte 1 */
145 EXPECT_HDR2 = 1, /* Expect header byte 2 */
146 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
147 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
148 };
149
150
151 /* Transmit Fifo
152 * This Transmit queue is an extension of the edgeport Rx buffer.
153 * The maximum amount of data buffered in both the edgeport
154 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
155 */
156 struct TxFifo {
157 unsigned int head; /* index to head pointer (write) */
158 unsigned int tail; /* index to tail pointer (read) */
159 unsigned int count; /* Bytes in queue */
160 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
161 unsigned char *fifo; /* allocated Buffer */
162 };
163
164 /* This structure holds all of the local port information */
165 struct edgeport_port {
166 __u16 txCredits; /* our current credits for this port */
167 __u16 maxTxCredits; /* the max size of the port */
168
169 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
170 struct urb *write_urb; /* write URB for this port */
171 bool write_in_progress; /* 'true' while a write URB is outstanding */
172 spinlock_t ep_lock;
173
174 __u8 shadowLCR; /* last LCR value received */
175 __u8 shadowMCR; /* last MCR value received */
176 __u8 shadowMSR; /* last MSR value received */
177 __u8 shadowLSR; /* last LSR value received */
178 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
179 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
180 __u8 validDataMask;
181 __u32 baudRate;
182
183 bool open;
184 bool openPending;
185 bool commandPending;
186 bool closePending;
187 bool chaseResponsePending;
188
189 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
190 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
191 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
192
193 struct usb_serial_port *port; /* loop back to the owner of this object */
194 };
195
196
197 /* This structure holds all of the individual device information */
198 struct edgeport_serial {
199 char name[MAX_NAME_LEN+2]; /* string name of this device */
200
201 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
202 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
203 struct edgeport_product_info product_info; /* Product Info */
204 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
205 int is_epic; /* flag if EPiC device or not */
206
207 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
208 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
209 struct urb *interrupt_read_urb; /* our interrupt urb */
210
211 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
212 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
213 struct urb *read_urb; /* our bulk read urb */
214 bool read_in_progress;
215 spinlock_t es_lock;
216
217 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
218
219 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
220
221 enum RXSTATE rxState; /* the current state of the bulk receive processor */
222 __u8 rxHeader1; /* receive header byte 1 */
223 __u8 rxHeader2; /* receive header byte 2 */
224 __u8 rxHeader3; /* receive header byte 3 */
225 __u8 rxPort; /* the port that we are currently receiving data for */
226 __u8 rxStatusCode; /* the receive status code */
227 __u8 rxStatusParam; /* the receive status paramater */
228 __s16 rxBytesRemaining; /* the number of port bytes left to read */
229 struct usb_serial *serial; /* loop back to the owner of this object */
230 };
231
232 /* baud rate information */
233 struct divisor_table_entry {
234 __u32 BaudRate;
235 __u16 Divisor;
236 };
237
238 /*
239 * Define table of divisors for Rev A EdgePort/4 hardware
240 * These assume a 3.6864MHz crystal, the standard /16, and
241 * MCR.7 = 0.
242 */
243
244 static const struct divisor_table_entry divisor_table[] = {
245 { 50, 4608},
246 { 75, 3072},
247 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
248 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
249 { 150, 1536},
250 { 300, 768},
251 { 600, 384},
252 { 1200, 192},
253 { 1800, 128},
254 { 2400, 96},
255 { 4800, 48},
256 { 7200, 32},
257 { 9600, 24},
258 { 14400, 16},
259 { 19200, 12},
260 { 38400, 6},
261 { 57600, 4},
262 { 115200, 2},
263 { 230400, 1},
264 };
265
266 /* Number of outstanding Command Write Urbs */
267 static atomic_t CmdUrbs = ATOMIC_INIT(0);
268
269
270 /* local function prototypes */
271
272 /* function prototypes for all URB callbacks */
273 static void edge_interrupt_callback(struct urb *urb);
274 static void edge_bulk_in_callback(struct urb *urb);
275 static void edge_bulk_out_data_callback(struct urb *urb);
276 static void edge_bulk_out_cmd_callback(struct urb *urb);
277
278 /* function prototypes for the usbserial callbacks */
279 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
280 static void edge_close(struct usb_serial_port *port);
281 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
282 const unsigned char *buf, int count);
283 static int edge_write_room(struct tty_struct *tty);
284 static int edge_chars_in_buffer(struct tty_struct *tty);
285 static void edge_throttle(struct tty_struct *tty);
286 static void edge_unthrottle(struct tty_struct *tty);
287 static void edge_set_termios(struct tty_struct *tty,
288 struct usb_serial_port *port,
289 struct ktermios *old_termios);
290 static int edge_ioctl(struct tty_struct *tty,
291 unsigned int cmd, unsigned long arg);
292 static void edge_break(struct tty_struct *tty, int break_state);
293 static int edge_tiocmget(struct tty_struct *tty);
294 static int edge_tiocmset(struct tty_struct *tty,
295 unsigned int set, unsigned int clear);
296 static int edge_startup(struct usb_serial *serial);
297 static void edge_disconnect(struct usb_serial *serial);
298 static void edge_release(struct usb_serial *serial);
299 static int edge_port_probe(struct usb_serial_port *port);
300 static int edge_port_remove(struct usb_serial_port *port);
301
302 /* function prototypes for all of our local functions */
303
304 static void process_rcvd_data(struct edgeport_serial *edge_serial,
305 unsigned char *buffer, __u16 bufferLength);
306 static void process_rcvd_status(struct edgeport_serial *edge_serial,
307 __u8 byte2, __u8 byte3);
308 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
309 int length);
310 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
311 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
312 __u8 lsr, __u8 data);
313 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
314 __u8 param);
315 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
316 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
317 int baudRate);
318 static void change_port_settings(struct tty_struct *tty,
319 struct edgeport_port *edge_port,
320 struct ktermios *old_termios);
321 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
322 __u8 regNum, __u8 regValue);
323 static int write_cmd_usb(struct edgeport_port *edge_port,
324 unsigned char *buffer, int writeLength);
325 static void send_more_port_data(struct edgeport_serial *edge_serial,
326 struct edgeport_port *edge_port);
327
328 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
329 __u16 length, const __u8 *data);
330 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
331 __u16 length, __u8 *data);
332 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
333 __u16 length, const __u8 *data);
334 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
335 static void get_boot_desc(struct edgeport_serial *edge_serial);
336 static void load_application_firmware(struct edgeport_serial *edge_serial);
337
338 static void unicode_to_ascii(char *string, int buflen,
339 __le16 *unicode, int unicode_size);
340
341
342 /* ************************************************************************ */
343 /* ************************************************************************ */
344 /* ************************************************************************ */
345 /* ************************************************************************ */
346
347 /************************************************************************
348 * *
349 * update_edgeport_E2PROM() Compare current versions of *
350 * Boot ROM and Manufacture *
351 * Descriptors with versions *
352 * embedded in this driver *
353 * *
354 ************************************************************************/
update_edgeport_E2PROM(struct edgeport_serial * edge_serial)355 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
356 {
357 struct device *dev = &edge_serial->serial->dev->dev;
358 __u32 BootCurVer;
359 __u32 BootNewVer;
360 __u8 BootMajorVersion;
361 __u8 BootMinorVersion;
362 __u16 BootBuildNumber;
363 __u32 Bootaddr;
364 const struct ihex_binrec *rec;
365 const struct firmware *fw;
366 const char *fw_name;
367 int response;
368
369 switch (edge_serial->product_info.iDownloadFile) {
370 case EDGE_DOWNLOAD_FILE_I930:
371 fw_name = "edgeport/boot.fw";
372 break;
373 case EDGE_DOWNLOAD_FILE_80251:
374 fw_name = "edgeport/boot2.fw";
375 break;
376 default:
377 return;
378 }
379
380 response = request_ihex_firmware(&fw, fw_name,
381 &edge_serial->serial->dev->dev);
382 if (response) {
383 dev_err(dev, "Failed to load image \"%s\" err %d\n",
384 fw_name, response);
385 return;
386 }
387
388 rec = (const struct ihex_binrec *)fw->data;
389 BootMajorVersion = rec->data[0];
390 BootMinorVersion = rec->data[1];
391 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
392
393 /* Check Boot Image Version */
394 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
395 (edge_serial->boot_descriptor.MinorVersion << 16) +
396 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
397
398 BootNewVer = (BootMajorVersion << 24) +
399 (BootMinorVersion << 16) +
400 BootBuildNumber;
401
402 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
403 edge_serial->boot_descriptor.MajorVersion,
404 edge_serial->boot_descriptor.MinorVersion,
405 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
406
407
408 if (BootNewVer > BootCurVer) {
409 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
410 edge_serial->boot_descriptor.MajorVersion,
411 edge_serial->boot_descriptor.MinorVersion,
412 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
413 BootMajorVersion, BootMinorVersion, BootBuildNumber);
414
415 dev_dbg(dev, "Downloading new Boot Image\n");
416
417 for (rec = ihex_next_binrec(rec); rec;
418 rec = ihex_next_binrec(rec)) {
419 Bootaddr = be32_to_cpu(rec->addr);
420 response = rom_write(edge_serial->serial,
421 Bootaddr >> 16,
422 Bootaddr & 0xFFFF,
423 be16_to_cpu(rec->len),
424 &rec->data[0]);
425 if (response < 0) {
426 dev_err(&edge_serial->serial->dev->dev,
427 "rom_write failed (%x, %x, %d)\n",
428 Bootaddr >> 16, Bootaddr & 0xFFFF,
429 be16_to_cpu(rec->len));
430 break;
431 }
432 }
433 } else {
434 dev_dbg(dev, "Boot Image -- already up to date\n");
435 }
436 release_firmware(fw);
437 }
438
439 #if 0
440 /************************************************************************
441 *
442 * Get string descriptor from device
443 *
444 ************************************************************************/
445 static int get_string_desc(struct usb_device *dev, int Id,
446 struct usb_string_descriptor **pRetDesc)
447 {
448 struct usb_string_descriptor StringDesc;
449 struct usb_string_descriptor *pStringDesc;
450
451 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
452
453 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
454 sizeof(StringDesc)))
455 return 0;
456
457 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
458 if (!pStringDesc)
459 return -1;
460
461 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
462 StringDesc.bLength)) {
463 kfree(pStringDesc);
464 return -1;
465 }
466
467 *pRetDesc = pStringDesc;
468 return 0;
469 }
470 #endif
471
dump_product_info(struct edgeport_serial * edge_serial,struct edgeport_product_info * product_info)472 static void dump_product_info(struct edgeport_serial *edge_serial,
473 struct edgeport_product_info *product_info)
474 {
475 struct device *dev = &edge_serial->serial->dev->dev;
476
477 /* Dump Product Info structure */
478 dev_dbg(dev, "**Product Information:\n");
479 dev_dbg(dev, " ProductId %x\n", product_info->ProductId);
480 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts);
481 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer);
482 dev_dbg(dev, " IsServer %d\n", product_info->IsServer);
483 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232);
484 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422);
485 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485);
486 dev_dbg(dev, " RomSize %d\n", product_info->RomSize);
487 dev_dbg(dev, " RamSize %d\n", product_info->RamSize);
488 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev);
489 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev);
490 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n",
491 product_info->BootMajorVersion,
492 product_info->BootMinorVersion,
493 le16_to_cpu(product_info->BootBuildNumber));
494 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n",
495 product_info->FirmwareMajorVersion,
496 product_info->FirmwareMinorVersion,
497 le16_to_cpu(product_info->FirmwareBuildNumber));
498 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n",
499 product_info->ManufactureDescDate[0],
500 product_info->ManufactureDescDate[1],
501 product_info->ManufactureDescDate[2]+1900);
502 dev_dbg(dev, " iDownloadFile 0x%x\n",
503 product_info->iDownloadFile);
504 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer);
505 }
506
get_product_info(struct edgeport_serial * edge_serial)507 static void get_product_info(struct edgeport_serial *edge_serial)
508 {
509 struct edgeport_product_info *product_info = &edge_serial->product_info;
510
511 memset(product_info, 0, sizeof(struct edgeport_product_info));
512
513 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
514 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
515 product_info->ProdInfoVer = 0;
516
517 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
518 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
519 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
520 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
521
522 product_info->BootMajorVersion =
523 edge_serial->boot_descriptor.MajorVersion;
524 product_info->BootMinorVersion =
525 edge_serial->boot_descriptor.MinorVersion;
526 product_info->BootBuildNumber =
527 edge_serial->boot_descriptor.BuildNumber;
528
529 memcpy(product_info->ManufactureDescDate,
530 edge_serial->manuf_descriptor.DescDate,
531 sizeof(edge_serial->manuf_descriptor.DescDate));
532
533 /* check if this is 2nd generation hardware */
534 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
535 & ION_DEVICE_ID_80251_NETCHIP)
536 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
537 else
538 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
539
540 /* Determine Product type and set appropriate flags */
541 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
542 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
543 case ION_DEVICE_ID_EDGEPORT_4T:
544 case ION_DEVICE_ID_EDGEPORT_4:
545 case ION_DEVICE_ID_EDGEPORT_2:
546 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
547 case ION_DEVICE_ID_EDGEPORT_8:
548 case ION_DEVICE_ID_EDGEPORT_421:
549 case ION_DEVICE_ID_EDGEPORT_21:
550 case ION_DEVICE_ID_EDGEPORT_2_DIN:
551 case ION_DEVICE_ID_EDGEPORT_4_DIN:
552 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
553 product_info->IsRS232 = 1;
554 break;
555
556 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
557 product_info->IsRS422 = 1;
558 product_info->IsRS485 = 1;
559 break;
560
561 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
562 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
563 product_info->IsRS422 = 1;
564 break;
565 }
566
567 dump_product_info(edge_serial, product_info);
568 }
569
get_epic_descriptor(struct edgeport_serial * ep)570 static int get_epic_descriptor(struct edgeport_serial *ep)
571 {
572 int result;
573 struct usb_serial *serial = ep->serial;
574 struct edgeport_product_info *product_info = &ep->product_info;
575 struct edge_compatibility_descriptor *epic;
576 struct edge_compatibility_bits *bits;
577 struct device *dev = &serial->dev->dev;
578
579 ep->is_epic = 0;
580
581 epic = kmalloc(sizeof(*epic), GFP_KERNEL);
582 if (!epic)
583 return -ENOMEM;
584
585 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
586 USB_REQUEST_ION_GET_EPIC_DESC,
587 0xC0, 0x00, 0x00,
588 epic, sizeof(*epic),
589 300);
590 if (result == sizeof(*epic)) {
591 ep->is_epic = 1;
592 memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
593 memset(product_info, 0, sizeof(struct edgeport_product_info));
594
595 product_info->NumPorts = epic->NumPorts;
596 product_info->ProdInfoVer = 0;
597 product_info->FirmwareMajorVersion = epic->MajorVersion;
598 product_info->FirmwareMinorVersion = epic->MinorVersion;
599 product_info->FirmwareBuildNumber = epic->BuildNumber;
600 product_info->iDownloadFile = epic->iDownloadFile;
601 product_info->EpicVer = epic->EpicVer;
602 product_info->Epic = epic->Supports;
603 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
604 dump_product_info(ep, product_info);
605
606 bits = &ep->epic_descriptor.Supports;
607 dev_dbg(dev, "**EPIC descriptor:\n");
608 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
609 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE");
610 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE");
611 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE");
612 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
613 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
614 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE");
615 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
616 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
617 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE");
618 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE");
619 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
620 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE");
621
622 result = 0;
623 } else if (result >= 0) {
624 dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
625 result);
626 result = -EIO;
627 }
628
629 kfree(epic);
630
631 return result;
632 }
633
634
635 /************************************************************************/
636 /************************************************************************/
637 /* U S B C A L L B A C K F U N C T I O N S */
638 /* U S B C A L L B A C K F U N C T I O N S */
639 /************************************************************************/
640 /************************************************************************/
641
642 /*****************************************************************************
643 * edge_interrupt_callback
644 * this is the callback function for when we have received data on the
645 * interrupt endpoint.
646 *****************************************************************************/
edge_interrupt_callback(struct urb * urb)647 static void edge_interrupt_callback(struct urb *urb)
648 {
649 struct edgeport_serial *edge_serial = urb->context;
650 struct device *dev;
651 struct edgeport_port *edge_port;
652 struct usb_serial_port *port;
653 unsigned char *data = urb->transfer_buffer;
654 int length = urb->actual_length;
655 unsigned long flags;
656 int bytes_avail;
657 int position;
658 int txCredits;
659 int portNumber;
660 int result;
661 int status = urb->status;
662
663 switch (status) {
664 case 0:
665 /* success */
666 break;
667 case -ECONNRESET:
668 case -ENOENT:
669 case -ESHUTDOWN:
670 /* this urb is terminated, clean up */
671 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
672 return;
673 default:
674 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
675 goto exit;
676 }
677
678 dev = &edge_serial->serial->dev->dev;
679
680 /* process this interrupt-read even if there are no ports open */
681 if (length) {
682 usb_serial_debug_data(dev, __func__, length, data);
683
684 if (length > 1) {
685 bytes_avail = data[0] | (data[1] << 8);
686 if (bytes_avail) {
687 spin_lock_irqsave(&edge_serial->es_lock, flags);
688 edge_serial->rxBytesAvail += bytes_avail;
689 dev_dbg(dev,
690 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
691 __func__, bytes_avail,
692 edge_serial->rxBytesAvail,
693 edge_serial->read_in_progress);
694
695 if (edge_serial->rxBytesAvail > 0 &&
696 !edge_serial->read_in_progress) {
697 dev_dbg(dev, "%s - posting a read\n", __func__);
698 edge_serial->read_in_progress = true;
699
700 /* we have pending bytes on the
701 bulk in pipe, send a request */
702 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
703 if (result) {
704 dev_err(dev,
705 "%s - usb_submit_urb(read bulk) failed with result = %d\n",
706 __func__, result);
707 edge_serial->read_in_progress = false;
708 }
709 }
710 spin_unlock_irqrestore(&edge_serial->es_lock,
711 flags);
712 }
713 }
714 /* grab the txcredits for the ports if available */
715 position = 2;
716 portNumber = 0;
717 while ((position < length - 1) &&
718 (portNumber < edge_serial->serial->num_ports)) {
719 txCredits = data[position] | (data[position+1] << 8);
720 if (txCredits) {
721 port = edge_serial->serial->port[portNumber];
722 edge_port = usb_get_serial_port_data(port);
723 if (edge_port && edge_port->open) {
724 spin_lock_irqsave(&edge_port->ep_lock,
725 flags);
726 edge_port->txCredits += txCredits;
727 spin_unlock_irqrestore(&edge_port->ep_lock,
728 flags);
729 dev_dbg(dev, "%s - txcredits for port%d = %d\n",
730 __func__, portNumber,
731 edge_port->txCredits);
732
733 /* tell the tty driver that something
734 has changed */
735 tty_port_tty_wakeup(&edge_port->port->port);
736 /* Since we have more credit, check
737 if more data can be sent */
738 send_more_port_data(edge_serial,
739 edge_port);
740 }
741 }
742 position += 2;
743 ++portNumber;
744 }
745 }
746
747 exit:
748 result = usb_submit_urb(urb, GFP_ATOMIC);
749 if (result)
750 dev_err(&urb->dev->dev,
751 "%s - Error %d submitting control urb\n",
752 __func__, result);
753 }
754
755
756 /*****************************************************************************
757 * edge_bulk_in_callback
758 * this is the callback function for when we have received data on the
759 * bulk in endpoint.
760 *****************************************************************************/
edge_bulk_in_callback(struct urb * urb)761 static void edge_bulk_in_callback(struct urb *urb)
762 {
763 struct edgeport_serial *edge_serial = urb->context;
764 struct device *dev;
765 unsigned char *data = urb->transfer_buffer;
766 int retval;
767 __u16 raw_data_length;
768 int status = urb->status;
769 unsigned long flags;
770
771 if (status) {
772 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
773 __func__, status);
774 edge_serial->read_in_progress = false;
775 return;
776 }
777
778 if (urb->actual_length == 0) {
779 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
780 edge_serial->read_in_progress = false;
781 return;
782 }
783
784 dev = &edge_serial->serial->dev->dev;
785 raw_data_length = urb->actual_length;
786
787 usb_serial_debug_data(dev, __func__, raw_data_length, data);
788
789 spin_lock_irqsave(&edge_serial->es_lock, flags);
790
791 /* decrement our rxBytes available by the number that we just got */
792 edge_serial->rxBytesAvail -= raw_data_length;
793
794 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
795 raw_data_length, edge_serial->rxBytesAvail);
796
797 process_rcvd_data(edge_serial, data, urb->actual_length);
798
799 /* check to see if there's any more data for us to read */
800 if (edge_serial->rxBytesAvail > 0) {
801 dev_dbg(dev, "%s - posting a read\n", __func__);
802 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
803 if (retval) {
804 dev_err(dev,
805 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
806 __func__, retval);
807 edge_serial->read_in_progress = false;
808 }
809 } else {
810 edge_serial->read_in_progress = false;
811 }
812
813 spin_unlock_irqrestore(&edge_serial->es_lock, flags);
814 }
815
816
817 /*****************************************************************************
818 * edge_bulk_out_data_callback
819 * this is the callback function for when we have finished sending
820 * serial data on the bulk out endpoint.
821 *****************************************************************************/
edge_bulk_out_data_callback(struct urb * urb)822 static void edge_bulk_out_data_callback(struct urb *urb)
823 {
824 struct edgeport_port *edge_port = urb->context;
825 int status = urb->status;
826
827 if (status) {
828 dev_dbg(&urb->dev->dev,
829 "%s - nonzero write bulk status received: %d\n",
830 __func__, status);
831 }
832
833 if (edge_port->open)
834 tty_port_tty_wakeup(&edge_port->port->port);
835
836 /* Release the Write URB */
837 edge_port->write_in_progress = false;
838
839 /* Check if more data needs to be sent */
840 send_more_port_data((struct edgeport_serial *)
841 (usb_get_serial_data(edge_port->port->serial)), edge_port);
842 }
843
844
845 /*****************************************************************************
846 * BulkOutCmdCallback
847 * this is the callback function for when we have finished sending a
848 * command on the bulk out endpoint.
849 *****************************************************************************/
edge_bulk_out_cmd_callback(struct urb * urb)850 static void edge_bulk_out_cmd_callback(struct urb *urb)
851 {
852 struct edgeport_port *edge_port = urb->context;
853 int status = urb->status;
854
855 atomic_dec(&CmdUrbs);
856 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
857 __func__, urb, atomic_read(&CmdUrbs));
858
859
860 /* clean up the transfer buffer */
861 kfree(urb->transfer_buffer);
862
863 /* Free the command urb */
864 usb_free_urb(urb);
865
866 if (status) {
867 dev_dbg(&urb->dev->dev,
868 "%s - nonzero write bulk status received: %d\n",
869 __func__, status);
870 return;
871 }
872
873 /* tell the tty driver that something has changed */
874 if (edge_port->open)
875 tty_port_tty_wakeup(&edge_port->port->port);
876
877 /* we have completed the command */
878 edge_port->commandPending = false;
879 wake_up(&edge_port->wait_command);
880 }
881
882
883 /*****************************************************************************
884 * Driver tty interface functions
885 *****************************************************************************/
886
887 /*****************************************************************************
888 * SerialOpen
889 * this function is called by the tty driver when a port is opened
890 * If successful, we return 0
891 * Otherwise we return a negative error number.
892 *****************************************************************************/
edge_open(struct tty_struct * tty,struct usb_serial_port * port)893 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
894 {
895 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
896 struct device *dev = &port->dev;
897 struct usb_serial *serial;
898 struct edgeport_serial *edge_serial;
899 int response;
900
901 if (edge_port == NULL)
902 return -ENODEV;
903
904 /* see if we've set up our endpoint info yet (can't set it up
905 in edge_startup as the structures were not set up at that time.) */
906 serial = port->serial;
907 edge_serial = usb_get_serial_data(serial);
908 if (edge_serial == NULL)
909 return -ENODEV;
910 if (edge_serial->interrupt_in_buffer == NULL) {
911 struct usb_serial_port *port0 = serial->port[0];
912
913 /* not set up yet, so do it now */
914 edge_serial->interrupt_in_buffer =
915 port0->interrupt_in_buffer;
916 edge_serial->interrupt_in_endpoint =
917 port0->interrupt_in_endpointAddress;
918 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
919 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
920 edge_serial->bulk_in_endpoint =
921 port0->bulk_in_endpointAddress;
922 edge_serial->read_urb = port0->read_urb;
923 edge_serial->bulk_out_endpoint =
924 port0->bulk_out_endpointAddress;
925
926 /* set up our interrupt urb */
927 usb_fill_int_urb(edge_serial->interrupt_read_urb,
928 serial->dev,
929 usb_rcvintpipe(serial->dev,
930 port0->interrupt_in_endpointAddress),
931 port0->interrupt_in_buffer,
932 edge_serial->interrupt_read_urb->transfer_buffer_length,
933 edge_interrupt_callback, edge_serial,
934 edge_serial->interrupt_read_urb->interval);
935
936 /* set up our bulk in urb */
937 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
938 usb_rcvbulkpipe(serial->dev,
939 port0->bulk_in_endpointAddress),
940 port0->bulk_in_buffer,
941 edge_serial->read_urb->transfer_buffer_length,
942 edge_bulk_in_callback, edge_serial);
943 edge_serial->read_in_progress = false;
944
945 /* start interrupt read for this edgeport
946 * this interrupt will continue as long
947 * as the edgeport is connected */
948 response = usb_submit_urb(edge_serial->interrupt_read_urb,
949 GFP_KERNEL);
950 if (response) {
951 dev_err(dev, "%s - Error %d submitting control urb\n",
952 __func__, response);
953 }
954 }
955
956 /* initialize our wait queues */
957 init_waitqueue_head(&edge_port->wait_open);
958 init_waitqueue_head(&edge_port->wait_chase);
959 init_waitqueue_head(&edge_port->wait_command);
960
961 /* initialize our port settings */
962 edge_port->txCredits = 0; /* Can't send any data yet */
963 /* Must always set this bit to enable ints! */
964 edge_port->shadowMCR = MCR_MASTER_IE;
965 edge_port->chaseResponsePending = false;
966
967 /* send a open port command */
968 edge_port->openPending = true;
969 edge_port->open = false;
970 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
971
972 if (response < 0) {
973 dev_err(dev, "%s - error sending open port command\n", __func__);
974 edge_port->openPending = false;
975 return -ENODEV;
976 }
977
978 /* now wait for the port to be completely opened */
979 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
980 OPEN_TIMEOUT);
981
982 if (!edge_port->open) {
983 /* open timed out */
984 dev_dbg(dev, "%s - open timedout\n", __func__);
985 edge_port->openPending = false;
986 return -ENODEV;
987 }
988
989 /* create the txfifo */
990 edge_port->txfifo.head = 0;
991 edge_port->txfifo.tail = 0;
992 edge_port->txfifo.count = 0;
993 edge_port->txfifo.size = edge_port->maxTxCredits;
994 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
995
996 if (!edge_port->txfifo.fifo) {
997 edge_close(port);
998 return -ENOMEM;
999 }
1000
1001 /* Allocate a URB for the write */
1002 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
1003 edge_port->write_in_progress = false;
1004
1005 if (!edge_port->write_urb) {
1006 edge_close(port);
1007 return -ENOMEM;
1008 }
1009
1010 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
1011 __func__, edge_port->maxTxCredits);
1012
1013 return 0;
1014 }
1015
1016
1017 /************************************************************************
1018 *
1019 * block_until_chase_response
1020 *
1021 * This function will block the close until one of the following:
1022 * 1. Response to our Chase comes from Edgeport
1023 * 2. A timeout of 10 seconds without activity has expired
1024 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
1025 *
1026 ************************************************************************/
block_until_chase_response(struct edgeport_port * edge_port)1027 static void block_until_chase_response(struct edgeport_port *edge_port)
1028 {
1029 struct device *dev = &edge_port->port->dev;
1030 DEFINE_WAIT(wait);
1031 __u16 lastCredits;
1032 int timeout = 1*HZ;
1033 int loop = 10;
1034
1035 while (1) {
1036 /* Save Last credits */
1037 lastCredits = edge_port->txCredits;
1038
1039 /* Did we get our Chase response */
1040 if (!edge_port->chaseResponsePending) {
1041 dev_dbg(dev, "%s - Got Chase Response\n", __func__);
1042
1043 /* did we get all of our credit back? */
1044 if (edge_port->txCredits == edge_port->maxTxCredits) {
1045 dev_dbg(dev, "%s - Got all credits\n", __func__);
1046 return;
1047 }
1048 }
1049
1050 /* Block the thread for a while */
1051 prepare_to_wait(&edge_port->wait_chase, &wait,
1052 TASK_UNINTERRUPTIBLE);
1053 schedule_timeout(timeout);
1054 finish_wait(&edge_port->wait_chase, &wait);
1055
1056 if (lastCredits == edge_port->txCredits) {
1057 /* No activity.. count down. */
1058 loop--;
1059 if (loop == 0) {
1060 edge_port->chaseResponsePending = false;
1061 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
1062 return;
1063 }
1064 } else {
1065 /* Reset timeout value back to 10 seconds */
1066 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
1067 lastCredits, edge_port->txCredits);
1068 loop = 10;
1069 }
1070 }
1071 }
1072
1073
1074 /************************************************************************
1075 *
1076 * block_until_tx_empty
1077 *
1078 * This function will block the close until one of the following:
1079 * 1. TX count are 0
1080 * 2. The edgeport has stopped
1081 * 3. A timeout of 3 seconds without activity has expired
1082 *
1083 ************************************************************************/
block_until_tx_empty(struct edgeport_port * edge_port)1084 static void block_until_tx_empty(struct edgeport_port *edge_port)
1085 {
1086 struct device *dev = &edge_port->port->dev;
1087 DEFINE_WAIT(wait);
1088 struct TxFifo *fifo = &edge_port->txfifo;
1089 __u32 lastCount;
1090 int timeout = HZ/10;
1091 int loop = 30;
1092
1093 while (1) {
1094 /* Save Last count */
1095 lastCount = fifo->count;
1096
1097 /* Is the Edgeport Buffer empty? */
1098 if (lastCount == 0) {
1099 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1100 return;
1101 }
1102
1103 /* Block the thread for a while */
1104 prepare_to_wait(&edge_port->wait_chase, &wait,
1105 TASK_UNINTERRUPTIBLE);
1106 schedule_timeout(timeout);
1107 finish_wait(&edge_port->wait_chase, &wait);
1108
1109 dev_dbg(dev, "%s wait\n", __func__);
1110
1111 if (lastCount == fifo->count) {
1112 /* No activity.. count down. */
1113 loop--;
1114 if (loop == 0) {
1115 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1116 return;
1117 }
1118 } else {
1119 /* Reset timeout value back to seconds */
1120 loop = 30;
1121 }
1122 }
1123 }
1124
1125
1126 /*****************************************************************************
1127 * edge_close
1128 * this function is called by the tty driver when a port is closed
1129 *****************************************************************************/
edge_close(struct usb_serial_port * port)1130 static void edge_close(struct usb_serial_port *port)
1131 {
1132 struct edgeport_serial *edge_serial;
1133 struct edgeport_port *edge_port;
1134 int status;
1135
1136 edge_serial = usb_get_serial_data(port->serial);
1137 edge_port = usb_get_serial_port_data(port);
1138 if (edge_serial == NULL || edge_port == NULL)
1139 return;
1140
1141 /* block until tx is empty */
1142 block_until_tx_empty(edge_port);
1143
1144 edge_port->closePending = true;
1145
1146 if (!edge_serial->is_epic ||
1147 edge_serial->epic_descriptor.Supports.IOSPChase) {
1148 /* flush and chase */
1149 edge_port->chaseResponsePending = true;
1150
1151 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1152 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1153 if (status == 0)
1154 /* block until chase finished */
1155 block_until_chase_response(edge_port);
1156 else
1157 edge_port->chaseResponsePending = false;
1158 }
1159
1160 if (!edge_serial->is_epic ||
1161 edge_serial->epic_descriptor.Supports.IOSPClose) {
1162 /* close the port */
1163 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1164 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1165 }
1166
1167 /* port->close = true; */
1168 edge_port->closePending = false;
1169 edge_port->open = false;
1170 edge_port->openPending = false;
1171
1172 usb_kill_urb(edge_port->write_urb);
1173
1174 if (edge_port->write_urb) {
1175 /* if this urb had a transfer buffer already
1176 (old transfer) free it */
1177 kfree(edge_port->write_urb->transfer_buffer);
1178 usb_free_urb(edge_port->write_urb);
1179 edge_port->write_urb = NULL;
1180 }
1181 kfree(edge_port->txfifo.fifo);
1182 edge_port->txfifo.fifo = NULL;
1183 }
1184
1185 /*****************************************************************************
1186 * SerialWrite
1187 * this function is called by the tty driver when data should be written
1188 * to the port.
1189 * If successful, we return the number of bytes written, otherwise we
1190 * return a negative error number.
1191 *****************************************************************************/
edge_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * data,int count)1192 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1193 const unsigned char *data, int count)
1194 {
1195 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1196 struct TxFifo *fifo;
1197 int copySize;
1198 int bytesleft;
1199 int firsthalf;
1200 int secondhalf;
1201 unsigned long flags;
1202
1203 if (edge_port == NULL)
1204 return -ENODEV;
1205
1206 /* get a pointer to the Tx fifo */
1207 fifo = &edge_port->txfifo;
1208
1209 spin_lock_irqsave(&edge_port->ep_lock, flags);
1210
1211 /* calculate number of bytes to put in fifo */
1212 copySize = min((unsigned int)count,
1213 (edge_port->txCredits - fifo->count));
1214
1215 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n",
1216 __func__, count, edge_port->txCredits - fifo->count, copySize);
1217
1218 /* catch writes of 0 bytes which the tty driver likes to give us,
1219 and when txCredits is empty */
1220 if (copySize == 0) {
1221 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1222 goto finish_write;
1223 }
1224
1225 /* queue the data
1226 * since we can never overflow the buffer we do not have to check for a
1227 * full condition
1228 *
1229 * the copy is done is two parts -- first fill to the end of the buffer
1230 * then copy the reset from the start of the buffer
1231 */
1232 bytesleft = fifo->size - fifo->head;
1233 firsthalf = min(bytesleft, copySize);
1234 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1235 firsthalf, bytesleft);
1236
1237 /* now copy our data */
1238 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1239 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1240
1241 /* update the index and size */
1242 fifo->head += firsthalf;
1243 fifo->count += firsthalf;
1244
1245 /* wrap the index */
1246 if (fifo->head == fifo->size)
1247 fifo->head = 0;
1248
1249 secondhalf = copySize-firsthalf;
1250
1251 if (secondhalf) {
1252 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1253 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1254 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1255 /* update the index and size */
1256 fifo->count += secondhalf;
1257 fifo->head += secondhalf;
1258 /* No need to check for wrap since we can not get to end of
1259 * the fifo in this part
1260 */
1261 }
1262
1263 finish_write:
1264 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1265
1266 send_more_port_data((struct edgeport_serial *)
1267 usb_get_serial_data(port->serial), edge_port);
1268
1269 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1270 __func__, copySize, edge_port->txCredits, fifo->count);
1271
1272 return copySize;
1273 }
1274
1275
1276 /************************************************************************
1277 *
1278 * send_more_port_data()
1279 *
1280 * This routine attempts to write additional UART transmit data
1281 * to a port over the USB bulk pipe. It is called (1) when new
1282 * data has been written to a port's TxBuffer from higher layers
1283 * (2) when the peripheral sends us additional TxCredits indicating
1284 * that it can accept more Tx data for a given port; and (3) when
1285 * a bulk write completes successfully and we want to see if we
1286 * can transmit more.
1287 *
1288 ************************************************************************/
send_more_port_data(struct edgeport_serial * edge_serial,struct edgeport_port * edge_port)1289 static void send_more_port_data(struct edgeport_serial *edge_serial,
1290 struct edgeport_port *edge_port)
1291 {
1292 struct TxFifo *fifo = &edge_port->txfifo;
1293 struct device *dev = &edge_port->port->dev;
1294 struct urb *urb;
1295 unsigned char *buffer;
1296 int status;
1297 int count;
1298 int bytesleft;
1299 int firsthalf;
1300 int secondhalf;
1301 unsigned long flags;
1302
1303 spin_lock_irqsave(&edge_port->ep_lock, flags);
1304
1305 if (edge_port->write_in_progress ||
1306 !edge_port->open ||
1307 (fifo->count == 0)) {
1308 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1309 __func__, fifo->count, edge_port->write_in_progress);
1310 goto exit_send;
1311 }
1312
1313 /* since the amount of data in the fifo will always fit into the
1314 * edgeport buffer we do not need to check the write length
1315 *
1316 * Do we have enough credits for this port to make it worthwhile
1317 * to bother queueing a write. If it's too small, say a few bytes,
1318 * it's better to wait for more credits so we can do a larger write.
1319 */
1320 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1321 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1322 __func__, fifo->count, edge_port->txCredits);
1323 goto exit_send;
1324 }
1325
1326 /* lock this write */
1327 edge_port->write_in_progress = true;
1328
1329 /* get a pointer to the write_urb */
1330 urb = edge_port->write_urb;
1331
1332 /* make sure transfer buffer is freed */
1333 kfree(urb->transfer_buffer);
1334 urb->transfer_buffer = NULL;
1335
1336 /* build the data header for the buffer and port that we are about
1337 to send out */
1338 count = fifo->count;
1339 buffer = kmalloc(count+2, GFP_ATOMIC);
1340 if (!buffer) {
1341 edge_port->write_in_progress = false;
1342 goto exit_send;
1343 }
1344 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1345 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1346
1347 /* now copy our data */
1348 bytesleft = fifo->size - fifo->tail;
1349 firsthalf = min(bytesleft, count);
1350 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1351 fifo->tail += firsthalf;
1352 fifo->count -= firsthalf;
1353 if (fifo->tail == fifo->size)
1354 fifo->tail = 0;
1355
1356 secondhalf = count-firsthalf;
1357 if (secondhalf) {
1358 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1359 secondhalf);
1360 fifo->tail += secondhalf;
1361 fifo->count -= secondhalf;
1362 }
1363
1364 if (count)
1365 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1366
1367 /* fill up the urb with all of our data and submit it */
1368 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1369 usb_sndbulkpipe(edge_serial->serial->dev,
1370 edge_serial->bulk_out_endpoint),
1371 buffer, count+2,
1372 edge_bulk_out_data_callback, edge_port);
1373
1374 /* decrement the number of credits we have by the number we just sent */
1375 edge_port->txCredits -= count;
1376 edge_port->port->icount.tx += count;
1377
1378 status = usb_submit_urb(urb, GFP_ATOMIC);
1379 if (status) {
1380 /* something went wrong */
1381 dev_err_console(edge_port->port,
1382 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1383 __func__, status);
1384 edge_port->write_in_progress = false;
1385
1386 /* revert the credits as something bad happened. */
1387 edge_port->txCredits += count;
1388 edge_port->port->icount.tx -= count;
1389 }
1390 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1391 __func__, count, edge_port->txCredits, fifo->count);
1392
1393 exit_send:
1394 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1395 }
1396
1397
1398 /*****************************************************************************
1399 * edge_write_room
1400 * this function is called by the tty driver when it wants to know how
1401 * many bytes of data we can accept for a specific port. If successful,
1402 * we return the amount of room that we have for this port (the txCredits)
1403 * otherwise we return a negative error number.
1404 *****************************************************************************/
edge_write_room(struct tty_struct * tty)1405 static int edge_write_room(struct tty_struct *tty)
1406 {
1407 struct usb_serial_port *port = tty->driver_data;
1408 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1409 int room;
1410 unsigned long flags;
1411
1412 if (edge_port == NULL)
1413 return 0;
1414 if (edge_port->closePending)
1415 return 0;
1416
1417 if (!edge_port->open) {
1418 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1419 return 0;
1420 }
1421
1422 /* total of both buffers is still txCredit */
1423 spin_lock_irqsave(&edge_port->ep_lock, flags);
1424 room = edge_port->txCredits - edge_port->txfifo.count;
1425 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1426
1427 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1428 return room;
1429 }
1430
1431
1432 /*****************************************************************************
1433 * edge_chars_in_buffer
1434 * this function is called by the tty driver when it wants to know how
1435 * many bytes of data we currently have outstanding in the port (data that
1436 * has been written, but hasn't made it out the port yet)
1437 * If successful, we return the number of bytes left to be written in the
1438 * system,
1439 * Otherwise we return a negative error number.
1440 *****************************************************************************/
edge_chars_in_buffer(struct tty_struct * tty)1441 static int edge_chars_in_buffer(struct tty_struct *tty)
1442 {
1443 struct usb_serial_port *port = tty->driver_data;
1444 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1445 int num_chars;
1446 unsigned long flags;
1447
1448 if (edge_port == NULL)
1449 return 0;
1450 if (edge_port->closePending)
1451 return 0;
1452
1453 if (!edge_port->open) {
1454 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1455 return 0;
1456 }
1457
1458 spin_lock_irqsave(&edge_port->ep_lock, flags);
1459 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1460 edge_port->txfifo.count;
1461 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1462 if (num_chars) {
1463 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1464 }
1465
1466 return num_chars;
1467 }
1468
1469
1470 /*****************************************************************************
1471 * SerialThrottle
1472 * this function is called by the tty driver when it wants to stop the data
1473 * being read from the port.
1474 *****************************************************************************/
edge_throttle(struct tty_struct * tty)1475 static void edge_throttle(struct tty_struct *tty)
1476 {
1477 struct usb_serial_port *port = tty->driver_data;
1478 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1479 int status;
1480
1481 if (edge_port == NULL)
1482 return;
1483
1484 if (!edge_port->open) {
1485 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1486 return;
1487 }
1488
1489 /* if we are implementing XON/XOFF, send the stop character */
1490 if (I_IXOFF(tty)) {
1491 unsigned char stop_char = STOP_CHAR(tty);
1492 status = edge_write(tty, port, &stop_char, 1);
1493 if (status <= 0)
1494 return;
1495 }
1496
1497 /* if we are implementing RTS/CTS, toggle that line */
1498 if (C_CRTSCTS(tty)) {
1499 edge_port->shadowMCR &= ~MCR_RTS;
1500 status = send_cmd_write_uart_register(edge_port, MCR,
1501 edge_port->shadowMCR);
1502 if (status != 0)
1503 return;
1504 }
1505 }
1506
1507
1508 /*****************************************************************************
1509 * edge_unthrottle
1510 * this function is called by the tty driver when it wants to resume the
1511 * data being read from the port (called after SerialThrottle is called)
1512 *****************************************************************************/
edge_unthrottle(struct tty_struct * tty)1513 static void edge_unthrottle(struct tty_struct *tty)
1514 {
1515 struct usb_serial_port *port = tty->driver_data;
1516 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1517 int status;
1518
1519 if (edge_port == NULL)
1520 return;
1521
1522 if (!edge_port->open) {
1523 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1524 return;
1525 }
1526
1527 /* if we are implementing XON/XOFF, send the start character */
1528 if (I_IXOFF(tty)) {
1529 unsigned char start_char = START_CHAR(tty);
1530 status = edge_write(tty, port, &start_char, 1);
1531 if (status <= 0)
1532 return;
1533 }
1534 /* if we are implementing RTS/CTS, toggle that line */
1535 if (C_CRTSCTS(tty)) {
1536 edge_port->shadowMCR |= MCR_RTS;
1537 send_cmd_write_uart_register(edge_port, MCR,
1538 edge_port->shadowMCR);
1539 }
1540 }
1541
1542
1543 /*****************************************************************************
1544 * SerialSetTermios
1545 * this function is called by the tty driver when it wants to change
1546 * the termios structure
1547 *****************************************************************************/
edge_set_termios(struct tty_struct * tty,struct usb_serial_port * port,struct ktermios * old_termios)1548 static void edge_set_termios(struct tty_struct *tty,
1549 struct usb_serial_port *port, struct ktermios *old_termios)
1550 {
1551 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1552
1553 if (edge_port == NULL)
1554 return;
1555
1556 if (!edge_port->open) {
1557 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1558 return;
1559 }
1560
1561 /* change the port settings to the new ones specified */
1562 change_port_settings(tty, edge_port, old_termios);
1563 }
1564
1565
1566 /*****************************************************************************
1567 * get_lsr_info - get line status register info
1568 *
1569 * Purpose: Let user call ioctl() to get info when the UART physically
1570 * is emptied. On bus types like RS485, the transmitter must
1571 * release the bus after transmitting. This must be done when
1572 * the transmit shift register is empty, not be done when the
1573 * transmit holding register is empty. This functionality
1574 * allows an RS485 driver to be written in user space.
1575 *****************************************************************************/
get_lsr_info(struct edgeport_port * edge_port,unsigned int __user * value)1576 static int get_lsr_info(struct edgeport_port *edge_port,
1577 unsigned int __user *value)
1578 {
1579 unsigned int result = 0;
1580 unsigned long flags;
1581
1582 spin_lock_irqsave(&edge_port->ep_lock, flags);
1583 if (edge_port->maxTxCredits == edge_port->txCredits &&
1584 edge_port->txfifo.count == 0) {
1585 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1586 result = TIOCSER_TEMT;
1587 }
1588 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1589
1590 if (copy_to_user(value, &result, sizeof(int)))
1591 return -EFAULT;
1592 return 0;
1593 }
1594
edge_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1595 static int edge_tiocmset(struct tty_struct *tty,
1596 unsigned int set, unsigned int clear)
1597 {
1598 struct usb_serial_port *port = tty->driver_data;
1599 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1600 unsigned int mcr;
1601
1602 mcr = edge_port->shadowMCR;
1603 if (set & TIOCM_RTS)
1604 mcr |= MCR_RTS;
1605 if (set & TIOCM_DTR)
1606 mcr |= MCR_DTR;
1607 if (set & TIOCM_LOOP)
1608 mcr |= MCR_LOOPBACK;
1609
1610 if (clear & TIOCM_RTS)
1611 mcr &= ~MCR_RTS;
1612 if (clear & TIOCM_DTR)
1613 mcr &= ~MCR_DTR;
1614 if (clear & TIOCM_LOOP)
1615 mcr &= ~MCR_LOOPBACK;
1616
1617 edge_port->shadowMCR = mcr;
1618
1619 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1620
1621 return 0;
1622 }
1623
edge_tiocmget(struct tty_struct * tty)1624 static int edge_tiocmget(struct tty_struct *tty)
1625 {
1626 struct usb_serial_port *port = tty->driver_data;
1627 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1628 unsigned int result = 0;
1629 unsigned int msr;
1630 unsigned int mcr;
1631
1632 msr = edge_port->shadowMSR;
1633 mcr = edge_port->shadowMCR;
1634 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1635 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1636 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1637 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1638 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1639 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1640
1641 return result;
1642 }
1643
get_serial_info(struct edgeport_port * edge_port,struct serial_struct __user * retinfo)1644 static int get_serial_info(struct edgeport_port *edge_port,
1645 struct serial_struct __user *retinfo)
1646 {
1647 struct serial_struct tmp;
1648
1649 memset(&tmp, 0, sizeof(tmp));
1650
1651 tmp.type = PORT_16550A;
1652 tmp.line = edge_port->port->minor;
1653 tmp.port = edge_port->port->port_number;
1654 tmp.irq = 0;
1655 tmp.xmit_fifo_size = edge_port->maxTxCredits;
1656 tmp.baud_base = 9600;
1657 tmp.close_delay = 5*HZ;
1658 tmp.closing_wait = 30*HZ;
1659
1660 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1661 return -EFAULT;
1662 return 0;
1663 }
1664
1665
1666 /*****************************************************************************
1667 * SerialIoctl
1668 * this function handles any ioctl calls to the driver
1669 *****************************************************************************/
edge_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)1670 static int edge_ioctl(struct tty_struct *tty,
1671 unsigned int cmd, unsigned long arg)
1672 {
1673 struct usb_serial_port *port = tty->driver_data;
1674 DEFINE_WAIT(wait);
1675 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1676
1677 switch (cmd) {
1678 case TIOCSERGETLSR:
1679 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1680 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1681
1682 case TIOCGSERIAL:
1683 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1684 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1685 }
1686 return -ENOIOCTLCMD;
1687 }
1688
1689
1690 /*****************************************************************************
1691 * SerialBreak
1692 * this function sends a break to the port
1693 *****************************************************************************/
edge_break(struct tty_struct * tty,int break_state)1694 static void edge_break(struct tty_struct *tty, int break_state)
1695 {
1696 struct usb_serial_port *port = tty->driver_data;
1697 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1698 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1699 int status;
1700
1701 if (!edge_serial->is_epic ||
1702 edge_serial->epic_descriptor.Supports.IOSPChase) {
1703 /* flush and chase */
1704 edge_port->chaseResponsePending = true;
1705
1706 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1707 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1708 if (status == 0) {
1709 /* block until chase finished */
1710 block_until_chase_response(edge_port);
1711 } else {
1712 edge_port->chaseResponsePending = false;
1713 }
1714 }
1715
1716 if (!edge_serial->is_epic ||
1717 edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1718 if (break_state == -1) {
1719 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1720 status = send_iosp_ext_cmd(edge_port,
1721 IOSP_CMD_SET_BREAK, 0);
1722 } else {
1723 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1724 status = send_iosp_ext_cmd(edge_port,
1725 IOSP_CMD_CLEAR_BREAK, 0);
1726 }
1727 if (status)
1728 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1729 __func__);
1730 }
1731 }
1732
1733
1734 /*****************************************************************************
1735 * process_rcvd_data
1736 * this function handles the data received on the bulk in pipe.
1737 *****************************************************************************/
process_rcvd_data(struct edgeport_serial * edge_serial,unsigned char * buffer,__u16 bufferLength)1738 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1739 unsigned char *buffer, __u16 bufferLength)
1740 {
1741 struct usb_serial *serial = edge_serial->serial;
1742 struct device *dev = &serial->dev->dev;
1743 struct usb_serial_port *port;
1744 struct edgeport_port *edge_port;
1745 __u16 lastBufferLength;
1746 __u16 rxLen;
1747
1748 lastBufferLength = bufferLength + 1;
1749
1750 while (bufferLength > 0) {
1751 /* failsafe incase we get a message that we don't understand */
1752 if (lastBufferLength == bufferLength) {
1753 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1754 break;
1755 }
1756 lastBufferLength = bufferLength;
1757
1758 switch (edge_serial->rxState) {
1759 case EXPECT_HDR1:
1760 edge_serial->rxHeader1 = *buffer;
1761 ++buffer;
1762 --bufferLength;
1763
1764 if (bufferLength == 0) {
1765 edge_serial->rxState = EXPECT_HDR2;
1766 break;
1767 }
1768 /* otherwise, drop on through */
1769 case EXPECT_HDR2:
1770 edge_serial->rxHeader2 = *buffer;
1771 ++buffer;
1772 --bufferLength;
1773
1774 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1775 edge_serial->rxHeader1, edge_serial->rxHeader2);
1776 /* Process depending on whether this header is
1777 * data or status */
1778
1779 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1780 /* Decode this status header and go to
1781 * EXPECT_HDR1 (if we can process the status
1782 * with only 2 bytes), or go to EXPECT_HDR3 to
1783 * get the third byte. */
1784 edge_serial->rxPort =
1785 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1786 edge_serial->rxStatusCode =
1787 IOSP_GET_STATUS_CODE(
1788 edge_serial->rxHeader1);
1789
1790 if (!IOSP_STATUS_IS_2BYTE(
1791 edge_serial->rxStatusCode)) {
1792 /* This status needs additional bytes.
1793 * Save what we have and then wait for
1794 * more data.
1795 */
1796 edge_serial->rxStatusParam
1797 = edge_serial->rxHeader2;
1798 edge_serial->rxState = EXPECT_HDR3;
1799 break;
1800 }
1801 /* We have all the header bytes, process the
1802 status now */
1803 process_rcvd_status(edge_serial,
1804 edge_serial->rxHeader2, 0);
1805 edge_serial->rxState = EXPECT_HDR1;
1806 break;
1807 } else {
1808 edge_serial->rxPort =
1809 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1810 edge_serial->rxBytesRemaining =
1811 IOSP_GET_HDR_DATA_LEN(
1812 edge_serial->rxHeader1,
1813 edge_serial->rxHeader2);
1814 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1815 __func__,
1816 edge_serial->rxPort,
1817 edge_serial->rxBytesRemaining);
1818
1819 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1820 * ASSERT(DevExt->RxBytesRemaining <
1821 * IOSP_MAX_DATA_LENGTH);
1822 */
1823
1824 if (bufferLength == 0) {
1825 edge_serial->rxState = EXPECT_DATA;
1826 break;
1827 }
1828 /* Else, drop through */
1829 }
1830 case EXPECT_DATA: /* Expect data */
1831 if (bufferLength < edge_serial->rxBytesRemaining) {
1832 rxLen = bufferLength;
1833 /* Expect data to start next buffer */
1834 edge_serial->rxState = EXPECT_DATA;
1835 } else {
1836 /* BufLen >= RxBytesRemaining */
1837 rxLen = edge_serial->rxBytesRemaining;
1838 /* Start another header next time */
1839 edge_serial->rxState = EXPECT_HDR1;
1840 }
1841
1842 bufferLength -= rxLen;
1843 edge_serial->rxBytesRemaining -= rxLen;
1844
1845 /* spit this data back into the tty driver if this
1846 port is open */
1847 if (rxLen && edge_serial->rxPort < serial->num_ports) {
1848 port = serial->port[edge_serial->rxPort];
1849 edge_port = usb_get_serial_port_data(port);
1850 if (edge_port && edge_port->open) {
1851 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1852 __func__, rxLen,
1853 edge_serial->rxPort);
1854 edge_tty_recv(edge_port->port, buffer,
1855 rxLen);
1856 edge_port->port->icount.rx += rxLen;
1857 }
1858 }
1859 buffer += rxLen;
1860 break;
1861
1862 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1863 edge_serial->rxHeader3 = *buffer;
1864 ++buffer;
1865 --bufferLength;
1866
1867 /* We have all the header bytes, process the
1868 status now */
1869 process_rcvd_status(edge_serial,
1870 edge_serial->rxStatusParam,
1871 edge_serial->rxHeader3);
1872 edge_serial->rxState = EXPECT_HDR1;
1873 break;
1874 }
1875 }
1876 }
1877
1878
1879 /*****************************************************************************
1880 * process_rcvd_status
1881 * this function handles the any status messages received on the
1882 * bulk in pipe.
1883 *****************************************************************************/
process_rcvd_status(struct edgeport_serial * edge_serial,__u8 byte2,__u8 byte3)1884 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1885 __u8 byte2, __u8 byte3)
1886 {
1887 struct usb_serial_port *port;
1888 struct edgeport_port *edge_port;
1889 struct tty_struct *tty;
1890 struct device *dev;
1891 __u8 code = edge_serial->rxStatusCode;
1892
1893 /* switch the port pointer to the one being currently talked about */
1894 if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1895 return;
1896 port = edge_serial->serial->port[edge_serial->rxPort];
1897 edge_port = usb_get_serial_port_data(port);
1898 if (edge_port == NULL) {
1899 dev_err(&edge_serial->serial->dev->dev,
1900 "%s - edge_port == NULL for port %d\n",
1901 __func__, edge_serial->rxPort);
1902 return;
1903 }
1904 dev = &port->dev;
1905
1906 if (code == IOSP_EXT_STATUS) {
1907 switch (byte2) {
1908 case IOSP_EXT_STATUS_CHASE_RSP:
1909 /* we want to do EXT status regardless of port
1910 * open/closed */
1911 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1912 __func__, edge_serial->rxPort, byte3);
1913 /* Currently, the only EXT_STATUS is Chase, so process
1914 * here instead of one more call to one more subroutine
1915 * If/when more EXT_STATUS, there'll be more work to do
1916 * Also, we currently clear flag and close the port
1917 * regardless of content of above's Byte3.
1918 * We could choose to do something else when Byte3 says
1919 * Timeout on Chase from Edgeport, like wait longer in
1920 * block_until_chase_response, but for now we don't.
1921 */
1922 edge_port->chaseResponsePending = false;
1923 wake_up(&edge_port->wait_chase);
1924 return;
1925
1926 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1927 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1928 __func__, edge_serial->rxPort, byte3);
1929 /* Port->RxCheckRsp = true; */
1930 return;
1931 }
1932 }
1933
1934 if (code == IOSP_STATUS_OPEN_RSP) {
1935 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1936 edge_port->maxTxCredits = edge_port->txCredits;
1937 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1938 __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1939 handle_new_msr(edge_port, byte2);
1940
1941 /* send the current line settings to the port so we are
1942 in sync with any further termios calls */
1943 tty = tty_port_tty_get(&edge_port->port->port);
1944 if (tty) {
1945 change_port_settings(tty,
1946 edge_port, &tty->termios);
1947 tty_kref_put(tty);
1948 }
1949
1950 /* we have completed the open */
1951 edge_port->openPending = false;
1952 edge_port->open = true;
1953 wake_up(&edge_port->wait_open);
1954 return;
1955 }
1956
1957 /* If port is closed, silently discard all rcvd status. We can
1958 * have cases where buffered status is received AFTER the close
1959 * port command is sent to the Edgeport.
1960 */
1961 if (!edge_port->open || edge_port->closePending)
1962 return;
1963
1964 switch (code) {
1965 /* Not currently sent by Edgeport */
1966 case IOSP_STATUS_LSR:
1967 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1968 __func__, edge_serial->rxPort, byte2);
1969 handle_new_lsr(edge_port, false, byte2, 0);
1970 break;
1971
1972 case IOSP_STATUS_LSR_DATA:
1973 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1974 __func__, edge_serial->rxPort, byte2, byte3);
1975 /* byte2 is LSR Register */
1976 /* byte3 is broken data byte */
1977 handle_new_lsr(edge_port, true, byte2, byte3);
1978 break;
1979 /*
1980 * case IOSP_EXT_4_STATUS:
1981 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1982 * __func__, edge_serial->rxPort, byte2, byte3);
1983 * break;
1984 */
1985 case IOSP_STATUS_MSR:
1986 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1987 __func__, edge_serial->rxPort, byte2);
1988 /*
1989 * Process this new modem status and generate appropriate
1990 * events, etc, based on the new status. This routine
1991 * also saves the MSR in Port->ShadowMsr.
1992 */
1993 handle_new_msr(edge_port, byte2);
1994 break;
1995
1996 default:
1997 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1998 break;
1999 }
2000 }
2001
2002
2003 /*****************************************************************************
2004 * edge_tty_recv
2005 * this function passes data on to the tty flip buffer
2006 *****************************************************************************/
edge_tty_recv(struct usb_serial_port * port,unsigned char * data,int length)2007 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
2008 int length)
2009 {
2010 int cnt;
2011
2012 cnt = tty_insert_flip_string(&port->port, data, length);
2013 if (cnt < length) {
2014 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
2015 __func__, length - cnt);
2016 }
2017 data += cnt;
2018 length -= cnt;
2019
2020 tty_flip_buffer_push(&port->port);
2021 }
2022
2023
2024 /*****************************************************************************
2025 * handle_new_msr
2026 * this function handles any change to the msr register for a port.
2027 *****************************************************************************/
handle_new_msr(struct edgeport_port * edge_port,__u8 newMsr)2028 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2029 {
2030 struct async_icount *icount;
2031
2032 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2033 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2034 icount = &edge_port->port->icount;
2035
2036 /* update input line counters */
2037 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2038 icount->cts++;
2039 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2040 icount->dsr++;
2041 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2042 icount->dcd++;
2043 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2044 icount->rng++;
2045 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
2046 }
2047
2048 /* Save the new modem status */
2049 edge_port->shadowMSR = newMsr & 0xf0;
2050 }
2051
2052
2053 /*****************************************************************************
2054 * handle_new_lsr
2055 * this function handles any change to the lsr register for a port.
2056 *****************************************************************************/
handle_new_lsr(struct edgeport_port * edge_port,__u8 lsrData,__u8 lsr,__u8 data)2057 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2058 __u8 lsr, __u8 data)
2059 {
2060 __u8 newLsr = (__u8) (lsr & (__u8)
2061 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2062 struct async_icount *icount;
2063
2064 edge_port->shadowLSR = lsr;
2065
2066 if (newLsr & LSR_BREAK) {
2067 /*
2068 * Parity and Framing errors only count if they
2069 * occur exclusive of a break being
2070 * received.
2071 */
2072 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2073 }
2074
2075 /* Place LSR data byte into Rx buffer */
2076 if (lsrData)
2077 edge_tty_recv(edge_port->port, &data, 1);
2078
2079 /* update input line counters */
2080 icount = &edge_port->port->icount;
2081 if (newLsr & LSR_BREAK)
2082 icount->brk++;
2083 if (newLsr & LSR_OVER_ERR)
2084 icount->overrun++;
2085 if (newLsr & LSR_PAR_ERR)
2086 icount->parity++;
2087 if (newLsr & LSR_FRM_ERR)
2088 icount->frame++;
2089 }
2090
2091
2092 /****************************************************************************
2093 * sram_write
2094 * writes a number of bytes to the Edgeport device's sram starting at the
2095 * given address.
2096 * If successful returns the number of bytes written, otherwise it returns
2097 * a negative error number of the problem.
2098 ****************************************************************************/
sram_write(struct usb_serial * serial,__u16 extAddr,__u16 addr,__u16 length,const __u8 * data)2099 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2100 __u16 length, const __u8 *data)
2101 {
2102 int result;
2103 __u16 current_length;
2104 unsigned char *transfer_buffer;
2105
2106 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2107
2108 transfer_buffer = kmalloc(64, GFP_KERNEL);
2109 if (!transfer_buffer)
2110 return -ENOMEM;
2111
2112 /* need to split these writes up into 64 byte chunks */
2113 result = 0;
2114 while (length > 0) {
2115 if (length > 64)
2116 current_length = 64;
2117 else
2118 current_length = length;
2119
2120 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2121 memcpy(transfer_buffer, data, current_length);
2122 result = usb_control_msg(serial->dev,
2123 usb_sndctrlpipe(serial->dev, 0),
2124 USB_REQUEST_ION_WRITE_RAM,
2125 0x40, addr, extAddr, transfer_buffer,
2126 current_length, 300);
2127 if (result < 0)
2128 break;
2129 length -= current_length;
2130 addr += current_length;
2131 data += current_length;
2132 }
2133
2134 kfree(transfer_buffer);
2135 return result;
2136 }
2137
2138
2139 /****************************************************************************
2140 * rom_write
2141 * writes a number of bytes to the Edgeport device's ROM starting at the
2142 * given address.
2143 * If successful returns the number of bytes written, otherwise it returns
2144 * a negative error number of the problem.
2145 ****************************************************************************/
rom_write(struct usb_serial * serial,__u16 extAddr,__u16 addr,__u16 length,const __u8 * data)2146 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2147 __u16 length, const __u8 *data)
2148 {
2149 int result;
2150 __u16 current_length;
2151 unsigned char *transfer_buffer;
2152
2153 transfer_buffer = kmalloc(64, GFP_KERNEL);
2154 if (!transfer_buffer)
2155 return -ENOMEM;
2156
2157 /* need to split these writes up into 64 byte chunks */
2158 result = 0;
2159 while (length > 0) {
2160 if (length > 64)
2161 current_length = 64;
2162 else
2163 current_length = length;
2164 memcpy(transfer_buffer, data, current_length);
2165 result = usb_control_msg(serial->dev,
2166 usb_sndctrlpipe(serial->dev, 0),
2167 USB_REQUEST_ION_WRITE_ROM, 0x40,
2168 addr, extAddr,
2169 transfer_buffer, current_length, 300);
2170 if (result < 0)
2171 break;
2172 length -= current_length;
2173 addr += current_length;
2174 data += current_length;
2175 }
2176
2177 kfree(transfer_buffer);
2178 return result;
2179 }
2180
2181
2182 /****************************************************************************
2183 * rom_read
2184 * reads a number of bytes from the Edgeport device starting at the given
2185 * address.
2186 * Returns zero on success or a negative error number.
2187 ****************************************************************************/
rom_read(struct usb_serial * serial,__u16 extAddr,__u16 addr,__u16 length,__u8 * data)2188 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2189 __u16 addr, __u16 length, __u8 *data)
2190 {
2191 int result;
2192 __u16 current_length;
2193 unsigned char *transfer_buffer;
2194
2195 transfer_buffer = kmalloc(64, GFP_KERNEL);
2196 if (!transfer_buffer)
2197 return -ENOMEM;
2198
2199 /* need to split these reads up into 64 byte chunks */
2200 result = 0;
2201 while (length > 0) {
2202 if (length > 64)
2203 current_length = 64;
2204 else
2205 current_length = length;
2206 result = usb_control_msg(serial->dev,
2207 usb_rcvctrlpipe(serial->dev, 0),
2208 USB_REQUEST_ION_READ_ROM,
2209 0xC0, addr, extAddr, transfer_buffer,
2210 current_length, 300);
2211 if (result < current_length) {
2212 if (result >= 0)
2213 result = -EIO;
2214 break;
2215 }
2216 memcpy(data, transfer_buffer, current_length);
2217 length -= current_length;
2218 addr += current_length;
2219 data += current_length;
2220
2221 result = 0;
2222 }
2223
2224 kfree(transfer_buffer);
2225 return result;
2226 }
2227
2228
2229 /****************************************************************************
2230 * send_iosp_ext_cmd
2231 * Is used to send a IOSP message to the Edgeport device
2232 ****************************************************************************/
send_iosp_ext_cmd(struct edgeport_port * edge_port,__u8 command,__u8 param)2233 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2234 __u8 command, __u8 param)
2235 {
2236 unsigned char *buffer;
2237 unsigned char *currentCommand;
2238 int length = 0;
2239 int status = 0;
2240
2241 buffer = kmalloc(10, GFP_ATOMIC);
2242 if (!buffer)
2243 return -ENOMEM;
2244
2245 currentCommand = buffer;
2246
2247 MAKE_CMD_EXT_CMD(¤tCommand, &length, edge_port->port->port_number,
2248 command, param);
2249
2250 status = write_cmd_usb(edge_port, buffer, length);
2251 if (status) {
2252 /* something bad happened, let's free up the memory */
2253 kfree(buffer);
2254 }
2255
2256 return status;
2257 }
2258
2259
2260 /*****************************************************************************
2261 * write_cmd_usb
2262 * this function writes the given buffer out to the bulk write endpoint.
2263 *****************************************************************************/
write_cmd_usb(struct edgeport_port * edge_port,unsigned char * buffer,int length)2264 static int write_cmd_usb(struct edgeport_port *edge_port,
2265 unsigned char *buffer, int length)
2266 {
2267 struct edgeport_serial *edge_serial =
2268 usb_get_serial_data(edge_port->port->serial);
2269 struct device *dev = &edge_port->port->dev;
2270 int status = 0;
2271 struct urb *urb;
2272
2273 usb_serial_debug_data(dev, __func__, length, buffer);
2274
2275 /* Allocate our next urb */
2276 urb = usb_alloc_urb(0, GFP_ATOMIC);
2277 if (!urb)
2278 return -ENOMEM;
2279
2280 atomic_inc(&CmdUrbs);
2281 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2282 __func__, urb, atomic_read(&CmdUrbs));
2283
2284 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2285 usb_sndbulkpipe(edge_serial->serial->dev,
2286 edge_serial->bulk_out_endpoint),
2287 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2288
2289 edge_port->commandPending = true;
2290 status = usb_submit_urb(urb, GFP_ATOMIC);
2291
2292 if (status) {
2293 /* something went wrong */
2294 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2295 __func__, status);
2296 usb_free_urb(urb);
2297 atomic_dec(&CmdUrbs);
2298 return status;
2299 }
2300
2301 #if 0
2302 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2303
2304 if (edge_port->commandPending) {
2305 /* command timed out */
2306 dev_dbg(dev, "%s - command timed out\n", __func__);
2307 status = -EINVAL;
2308 }
2309 #endif
2310 return status;
2311 }
2312
2313
2314 /*****************************************************************************
2315 * send_cmd_write_baud_rate
2316 * this function sends the proper command to change the baud rate of the
2317 * specified port.
2318 *****************************************************************************/
send_cmd_write_baud_rate(struct edgeport_port * edge_port,int baudRate)2319 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2320 int baudRate)
2321 {
2322 struct edgeport_serial *edge_serial =
2323 usb_get_serial_data(edge_port->port->serial);
2324 struct device *dev = &edge_port->port->dev;
2325 unsigned char *cmdBuffer;
2326 unsigned char *currCmd;
2327 int cmdLen = 0;
2328 int divisor;
2329 int status;
2330 u32 number = edge_port->port->port_number;
2331
2332 if (edge_serial->is_epic &&
2333 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2334 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2335 baudRate);
2336 return 0;
2337 }
2338
2339 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2340
2341 status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2342 if (status) {
2343 dev_err(dev, "%s - bad baud rate\n", __func__);
2344 return status;
2345 }
2346
2347 /* Alloc memory for the string of commands. */
2348 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2349 if (!cmdBuffer)
2350 return -ENOMEM;
2351
2352 currCmd = cmdBuffer;
2353
2354 /* Enable access to divisor latch */
2355 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2356
2357 /* Write the divisor itself */
2358 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2359 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2360
2361 /* Restore original value to disable access to divisor latch */
2362 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2363 edge_port->shadowLCR);
2364
2365 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2366 if (status) {
2367 /* something bad happened, let's free up the memory */
2368 kfree(cmdBuffer);
2369 }
2370
2371 return status;
2372 }
2373
2374
2375 /*****************************************************************************
2376 * calc_baud_rate_divisor
2377 * this function calculates the proper baud rate divisor for the specified
2378 * baud rate.
2379 *****************************************************************************/
calc_baud_rate_divisor(struct device * dev,int baudrate,int * divisor)2380 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2381 {
2382 int i;
2383 __u16 custom;
2384
2385 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2386 if (divisor_table[i].BaudRate == baudrate) {
2387 *divisor = divisor_table[i].Divisor;
2388 return 0;
2389 }
2390 }
2391
2392 /* We have tried all of the standard baud rates
2393 * lets try to calculate the divisor for this baud rate
2394 * Make sure the baud rate is reasonable */
2395 if (baudrate > 50 && baudrate < 230400) {
2396 /* get divisor */
2397 custom = (__u16)((230400L + baudrate/2) / baudrate);
2398
2399 *divisor = custom;
2400
2401 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2402 return 0;
2403 }
2404
2405 return -1;
2406 }
2407
2408
2409 /*****************************************************************************
2410 * send_cmd_write_uart_register
2411 * this function builds up a uart register message and sends to the device.
2412 *****************************************************************************/
send_cmd_write_uart_register(struct edgeport_port * edge_port,__u8 regNum,__u8 regValue)2413 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2414 __u8 regNum, __u8 regValue)
2415 {
2416 struct edgeport_serial *edge_serial =
2417 usb_get_serial_data(edge_port->port->serial);
2418 struct device *dev = &edge_port->port->dev;
2419 unsigned char *cmdBuffer;
2420 unsigned char *currCmd;
2421 unsigned long cmdLen = 0;
2422 int status;
2423
2424 dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2425 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2426
2427 if (edge_serial->is_epic &&
2428 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2429 regNum == MCR) {
2430 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2431 return 0;
2432 }
2433
2434 if (edge_serial->is_epic &&
2435 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2436 regNum == LCR) {
2437 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2438 return 0;
2439 }
2440
2441 /* Alloc memory for the string of commands. */
2442 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2443 if (cmdBuffer == NULL)
2444 return -ENOMEM;
2445
2446 currCmd = cmdBuffer;
2447
2448 /* Build a cmd in the buffer to write the given register */
2449 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2450 regNum, regValue);
2451
2452 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2453 if (status) {
2454 /* something bad happened, let's free up the memory */
2455 kfree(cmdBuffer);
2456 }
2457
2458 return status;
2459 }
2460
2461
2462 /*****************************************************************************
2463 * change_port_settings
2464 * This routine is called to set the UART on the device to match the
2465 * specified new settings.
2466 *****************************************************************************/
2467
change_port_settings(struct tty_struct * tty,struct edgeport_port * edge_port,struct ktermios * old_termios)2468 static void change_port_settings(struct tty_struct *tty,
2469 struct edgeport_port *edge_port, struct ktermios *old_termios)
2470 {
2471 struct device *dev = &edge_port->port->dev;
2472 struct edgeport_serial *edge_serial =
2473 usb_get_serial_data(edge_port->port->serial);
2474 int baud;
2475 unsigned cflag;
2476 __u8 mask = 0xff;
2477 __u8 lData;
2478 __u8 lParity;
2479 __u8 lStop;
2480 __u8 rxFlow;
2481 __u8 txFlow;
2482 int status;
2483
2484 if (!edge_port->open &&
2485 !edge_port->openPending) {
2486 dev_dbg(dev, "%s - port not opened\n", __func__);
2487 return;
2488 }
2489
2490 cflag = tty->termios.c_cflag;
2491
2492 switch (cflag & CSIZE) {
2493 case CS5:
2494 lData = LCR_BITS_5; mask = 0x1f;
2495 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2496 break;
2497 case CS6:
2498 lData = LCR_BITS_6; mask = 0x3f;
2499 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2500 break;
2501 case CS7:
2502 lData = LCR_BITS_7; mask = 0x7f;
2503 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2504 break;
2505 default:
2506 case CS8:
2507 lData = LCR_BITS_8;
2508 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2509 break;
2510 }
2511
2512 lParity = LCR_PAR_NONE;
2513 if (cflag & PARENB) {
2514 if (cflag & CMSPAR) {
2515 if (cflag & PARODD) {
2516 lParity = LCR_PAR_MARK;
2517 dev_dbg(dev, "%s - parity = mark\n", __func__);
2518 } else {
2519 lParity = LCR_PAR_SPACE;
2520 dev_dbg(dev, "%s - parity = space\n", __func__);
2521 }
2522 } else if (cflag & PARODD) {
2523 lParity = LCR_PAR_ODD;
2524 dev_dbg(dev, "%s - parity = odd\n", __func__);
2525 } else {
2526 lParity = LCR_PAR_EVEN;
2527 dev_dbg(dev, "%s - parity = even\n", __func__);
2528 }
2529 } else {
2530 dev_dbg(dev, "%s - parity = none\n", __func__);
2531 }
2532
2533 if (cflag & CSTOPB) {
2534 lStop = LCR_STOP_2;
2535 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2536 } else {
2537 lStop = LCR_STOP_1;
2538 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2539 }
2540
2541 /* figure out the flow control settings */
2542 rxFlow = txFlow = 0x00;
2543 if (cflag & CRTSCTS) {
2544 rxFlow |= IOSP_RX_FLOW_RTS;
2545 txFlow |= IOSP_TX_FLOW_CTS;
2546 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2547 } else {
2548 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2549 }
2550
2551 /* if we are implementing XON/XOFF, set the start and stop character
2552 in the device */
2553 if (I_IXOFF(tty) || I_IXON(tty)) {
2554 unsigned char stop_char = STOP_CHAR(tty);
2555 unsigned char start_char = START_CHAR(tty);
2556
2557 if (!edge_serial->is_epic ||
2558 edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2559 send_iosp_ext_cmd(edge_port,
2560 IOSP_CMD_SET_XON_CHAR, start_char);
2561 send_iosp_ext_cmd(edge_port,
2562 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2563 }
2564
2565 /* if we are implementing INBOUND XON/XOFF */
2566 if (I_IXOFF(tty)) {
2567 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2568 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2569 __func__, start_char, stop_char);
2570 } else {
2571 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2572 }
2573
2574 /* if we are implementing OUTBOUND XON/XOFF */
2575 if (I_IXON(tty)) {
2576 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2577 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2578 __func__, start_char, stop_char);
2579 } else {
2580 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2581 }
2582 }
2583
2584 /* Set flow control to the configured value */
2585 if (!edge_serial->is_epic ||
2586 edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2587 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2588 if (!edge_serial->is_epic ||
2589 edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2590 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2591
2592
2593 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2594 edge_port->shadowLCR |= (lData | lParity | lStop);
2595
2596 edge_port->validDataMask = mask;
2597
2598 /* Send the updated LCR value to the EdgePort */
2599 status = send_cmd_write_uart_register(edge_port, LCR,
2600 edge_port->shadowLCR);
2601 if (status != 0)
2602 return;
2603
2604 /* set up the MCR register and send it to the EdgePort */
2605 edge_port->shadowMCR = MCR_MASTER_IE;
2606 if (cflag & CBAUD)
2607 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2608
2609 status = send_cmd_write_uart_register(edge_port, MCR,
2610 edge_port->shadowMCR);
2611 if (status != 0)
2612 return;
2613
2614 /* Determine divisor based on baud rate */
2615 baud = tty_get_baud_rate(tty);
2616 if (!baud) {
2617 /* pick a default, any default... */
2618 baud = 9600;
2619 }
2620
2621 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2622 status = send_cmd_write_baud_rate(edge_port, baud);
2623 if (status == -1) {
2624 /* Speed change was not possible - put back the old speed */
2625 baud = tty_termios_baud_rate(old_termios);
2626 tty_encode_baud_rate(tty, baud, baud);
2627 }
2628 }
2629
2630
2631 /****************************************************************************
2632 * unicode_to_ascii
2633 * Turns a string from Unicode into ASCII.
2634 * Doesn't do a good job with any characters that are outside the normal
2635 * ASCII range, but it's only for debugging...
2636 * NOTE: expects the unicode in LE format
2637 ****************************************************************************/
unicode_to_ascii(char * string,int buflen,__le16 * unicode,int unicode_size)2638 static void unicode_to_ascii(char *string, int buflen,
2639 __le16 *unicode, int unicode_size)
2640 {
2641 int i;
2642
2643 if (buflen <= 0) /* never happens, but... */
2644 return;
2645 --buflen; /* space for nul */
2646
2647 for (i = 0; i < unicode_size; i++) {
2648 if (i >= buflen)
2649 break;
2650 string[i] = (char)(le16_to_cpu(unicode[i]));
2651 }
2652 string[i] = 0x00;
2653 }
2654
2655
2656 /****************************************************************************
2657 * get_manufacturing_desc
2658 * reads in the manufacturing descriptor and stores it into the serial
2659 * structure.
2660 ****************************************************************************/
get_manufacturing_desc(struct edgeport_serial * edge_serial)2661 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2662 {
2663 struct device *dev = &edge_serial->serial->dev->dev;
2664 int response;
2665
2666 dev_dbg(dev, "getting manufacturer descriptor\n");
2667
2668 response = rom_read(edge_serial->serial,
2669 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2670 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2671 EDGE_MANUF_DESC_LEN,
2672 (__u8 *)(&edge_serial->manuf_descriptor));
2673
2674 if (response < 0) {
2675 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2676 response);
2677 } else {
2678 char string[30];
2679 dev_dbg(dev, "**Manufacturer Descriptor\n");
2680 dev_dbg(dev, " RomSize: %dK\n",
2681 edge_serial->manuf_descriptor.RomSize);
2682 dev_dbg(dev, " RamSize: %dK\n",
2683 edge_serial->manuf_descriptor.RamSize);
2684 dev_dbg(dev, " CpuRev: %d\n",
2685 edge_serial->manuf_descriptor.CpuRev);
2686 dev_dbg(dev, " BoardRev: %d\n",
2687 edge_serial->manuf_descriptor.BoardRev);
2688 dev_dbg(dev, " NumPorts: %d\n",
2689 edge_serial->manuf_descriptor.NumPorts);
2690 dev_dbg(dev, " DescDate: %d/%d/%d\n",
2691 edge_serial->manuf_descriptor.DescDate[0],
2692 edge_serial->manuf_descriptor.DescDate[1],
2693 edge_serial->manuf_descriptor.DescDate[2]+1900);
2694 unicode_to_ascii(string, sizeof(string),
2695 edge_serial->manuf_descriptor.SerialNumber,
2696 edge_serial->manuf_descriptor.SerNumLength/2);
2697 dev_dbg(dev, " SerialNumber: %s\n", string);
2698 unicode_to_ascii(string, sizeof(string),
2699 edge_serial->manuf_descriptor.AssemblyNumber,
2700 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2701 dev_dbg(dev, " AssemblyNumber: %s\n", string);
2702 unicode_to_ascii(string, sizeof(string),
2703 edge_serial->manuf_descriptor.OemAssyNumber,
2704 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2705 dev_dbg(dev, " OemAssyNumber: %s\n", string);
2706 dev_dbg(dev, " UartType: %d\n",
2707 edge_serial->manuf_descriptor.UartType);
2708 dev_dbg(dev, " IonPid: %d\n",
2709 edge_serial->manuf_descriptor.IonPid);
2710 dev_dbg(dev, " IonConfig: %d\n",
2711 edge_serial->manuf_descriptor.IonConfig);
2712 }
2713 }
2714
2715
2716 /****************************************************************************
2717 * get_boot_desc
2718 * reads in the bootloader descriptor and stores it into the serial
2719 * structure.
2720 ****************************************************************************/
get_boot_desc(struct edgeport_serial * edge_serial)2721 static void get_boot_desc(struct edgeport_serial *edge_serial)
2722 {
2723 struct device *dev = &edge_serial->serial->dev->dev;
2724 int response;
2725
2726 dev_dbg(dev, "getting boot descriptor\n");
2727
2728 response = rom_read(edge_serial->serial,
2729 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2730 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2731 EDGE_BOOT_DESC_LEN,
2732 (__u8 *)(&edge_serial->boot_descriptor));
2733
2734 if (response < 0) {
2735 dev_err(dev, "error in getting boot descriptor: %d\n",
2736 response);
2737 } else {
2738 dev_dbg(dev, "**Boot Descriptor:\n");
2739 dev_dbg(dev, " BootCodeLength: %d\n",
2740 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2741 dev_dbg(dev, " MajorVersion: %d\n",
2742 edge_serial->boot_descriptor.MajorVersion);
2743 dev_dbg(dev, " MinorVersion: %d\n",
2744 edge_serial->boot_descriptor.MinorVersion);
2745 dev_dbg(dev, " BuildNumber: %d\n",
2746 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2747 dev_dbg(dev, " Capabilities: 0x%x\n",
2748 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2749 dev_dbg(dev, " UConfig0: %d\n",
2750 edge_serial->boot_descriptor.UConfig0);
2751 dev_dbg(dev, " UConfig1: %d\n",
2752 edge_serial->boot_descriptor.UConfig1);
2753 }
2754 }
2755
2756
2757 /****************************************************************************
2758 * load_application_firmware
2759 * This is called to load the application firmware to the device
2760 ****************************************************************************/
load_application_firmware(struct edgeport_serial * edge_serial)2761 static void load_application_firmware(struct edgeport_serial *edge_serial)
2762 {
2763 struct device *dev = &edge_serial->serial->dev->dev;
2764 const struct ihex_binrec *rec;
2765 const struct firmware *fw;
2766 const char *fw_name;
2767 const char *fw_info;
2768 int response;
2769 __u32 Operaddr;
2770 __u16 build;
2771
2772 switch (edge_serial->product_info.iDownloadFile) {
2773 case EDGE_DOWNLOAD_FILE_I930:
2774 fw_info = "downloading firmware version (930)";
2775 fw_name = "edgeport/down.fw";
2776 break;
2777
2778 case EDGE_DOWNLOAD_FILE_80251:
2779 fw_info = "downloading firmware version (80251)";
2780 fw_name = "edgeport/down2.fw";
2781 break;
2782
2783 case EDGE_DOWNLOAD_FILE_NONE:
2784 dev_dbg(dev, "No download file specified, skipping download\n");
2785 return;
2786
2787 default:
2788 return;
2789 }
2790
2791 response = request_ihex_firmware(&fw, fw_name,
2792 &edge_serial->serial->dev->dev);
2793 if (response) {
2794 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2795 fw_name, response);
2796 return;
2797 }
2798
2799 rec = (const struct ihex_binrec *)fw->data;
2800 build = (rec->data[2] << 8) | rec->data[3];
2801
2802 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2803
2804 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2805 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2806 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2807
2808 for (rec = ihex_next_binrec(rec); rec;
2809 rec = ihex_next_binrec(rec)) {
2810 Operaddr = be32_to_cpu(rec->addr);
2811 response = sram_write(edge_serial->serial,
2812 Operaddr >> 16,
2813 Operaddr & 0xFFFF,
2814 be16_to_cpu(rec->len),
2815 &rec->data[0]);
2816 if (response < 0) {
2817 dev_err(&edge_serial->serial->dev->dev,
2818 "sram_write failed (%x, %x, %d)\n",
2819 Operaddr >> 16, Operaddr & 0xFFFF,
2820 be16_to_cpu(rec->len));
2821 break;
2822 }
2823 }
2824
2825 dev_dbg(dev, "sending exec_dl_code\n");
2826 response = usb_control_msg (edge_serial->serial->dev,
2827 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2828 USB_REQUEST_ION_EXEC_DL_CODE,
2829 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2830
2831 release_firmware(fw);
2832 }
2833
2834
2835 /****************************************************************************
2836 * edge_startup
2837 ****************************************************************************/
edge_startup(struct usb_serial * serial)2838 static int edge_startup(struct usb_serial *serial)
2839 {
2840 struct edgeport_serial *edge_serial;
2841 struct usb_device *dev;
2842 struct device *ddev = &serial->dev->dev;
2843 int i;
2844 int response;
2845 bool interrupt_in_found;
2846 bool bulk_in_found;
2847 bool bulk_out_found;
2848 static const __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2849 EDGE_COMPATIBILITY_MASK1,
2850 EDGE_COMPATIBILITY_MASK2 };
2851
2852 dev = serial->dev;
2853
2854 /* create our private serial structure */
2855 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2856 if (!edge_serial)
2857 return -ENOMEM;
2858
2859 spin_lock_init(&edge_serial->es_lock);
2860 edge_serial->serial = serial;
2861 usb_set_serial_data(serial, edge_serial);
2862
2863 /* get the name for the device from the device */
2864 i = usb_string(dev, dev->descriptor.iManufacturer,
2865 &edge_serial->name[0], MAX_NAME_LEN+1);
2866 if (i < 0)
2867 i = 0;
2868 edge_serial->name[i++] = ' ';
2869 usb_string(dev, dev->descriptor.iProduct,
2870 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2871
2872 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2873
2874 /* Read the epic descriptor */
2875 if (get_epic_descriptor(edge_serial) < 0) {
2876 /* memcpy descriptor to Supports structures */
2877 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2878 sizeof(struct edge_compatibility_bits));
2879
2880 /* get the manufacturing descriptor for this device */
2881 get_manufacturing_desc(edge_serial);
2882
2883 /* get the boot descriptor */
2884 get_boot_desc(edge_serial);
2885
2886 get_product_info(edge_serial);
2887 }
2888
2889 /* set the number of ports from the manufacturing description */
2890 /* serial->num_ports = serial->product_info.NumPorts; */
2891 if ((!edge_serial->is_epic) &&
2892 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2893 dev_warn(ddev,
2894 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2895 edge_serial->product_info.NumPorts,
2896 serial->num_ports);
2897 }
2898
2899 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2900
2901 /* If not an EPiC device */
2902 if (!edge_serial->is_epic) {
2903 /* now load the application firmware into this device */
2904 load_application_firmware(edge_serial);
2905
2906 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2907
2908 /* Check current Edgeport EEPROM and update if necessary */
2909 update_edgeport_E2PROM(edge_serial);
2910
2911 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2912
2913 /* set the configuration to use #1 */
2914 /* dev_dbg(ddev, "set_configuration 1\n"); */
2915 /* usb_set_configuration (dev, 1); */
2916 }
2917 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n",
2918 edge_serial->product_info.FirmwareMajorVersion,
2919 edge_serial->product_info.FirmwareMinorVersion,
2920 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2921
2922 /* we set up the pointers to the endpoints in the edge_open function,
2923 * as the structures aren't created yet. */
2924
2925 response = 0;
2926
2927 if (edge_serial->is_epic) {
2928 struct usb_host_interface *alt;
2929
2930 alt = serial->interface->cur_altsetting;
2931
2932 /* EPIC thing, set up our interrupt polling now and our read
2933 * urb, so that the device knows it really is connected. */
2934 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2935 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2936 struct usb_endpoint_descriptor *endpoint;
2937 int buffer_size;
2938
2939 endpoint = &alt->endpoint[i].desc;
2940 buffer_size = usb_endpoint_maxp(endpoint);
2941 if (!interrupt_in_found &&
2942 (usb_endpoint_is_int_in(endpoint))) {
2943 /* we found a interrupt in endpoint */
2944 dev_dbg(ddev, "found interrupt in\n");
2945
2946 /* not set up yet, so do it now */
2947 edge_serial->interrupt_read_urb =
2948 usb_alloc_urb(0, GFP_KERNEL);
2949 if (!edge_serial->interrupt_read_urb) {
2950 response = -ENOMEM;
2951 break;
2952 }
2953
2954 edge_serial->interrupt_in_buffer =
2955 kmalloc(buffer_size, GFP_KERNEL);
2956 if (!edge_serial->interrupt_in_buffer) {
2957 response = -ENOMEM;
2958 break;
2959 }
2960 edge_serial->interrupt_in_endpoint =
2961 endpoint->bEndpointAddress;
2962
2963 /* set up our interrupt urb */
2964 usb_fill_int_urb(
2965 edge_serial->interrupt_read_urb,
2966 dev,
2967 usb_rcvintpipe(dev,
2968 endpoint->bEndpointAddress),
2969 edge_serial->interrupt_in_buffer,
2970 buffer_size,
2971 edge_interrupt_callback,
2972 edge_serial,
2973 endpoint->bInterval);
2974
2975 interrupt_in_found = true;
2976 }
2977
2978 if (!bulk_in_found &&
2979 (usb_endpoint_is_bulk_in(endpoint))) {
2980 /* we found a bulk in endpoint */
2981 dev_dbg(ddev, "found bulk in\n");
2982
2983 /* not set up yet, so do it now */
2984 edge_serial->read_urb =
2985 usb_alloc_urb(0, GFP_KERNEL);
2986 if (!edge_serial->read_urb) {
2987 response = -ENOMEM;
2988 break;
2989 }
2990
2991 edge_serial->bulk_in_buffer =
2992 kmalloc(buffer_size, GFP_KERNEL);
2993 if (!edge_serial->bulk_in_buffer) {
2994 response = -ENOMEM;
2995 break;
2996 }
2997 edge_serial->bulk_in_endpoint =
2998 endpoint->bEndpointAddress;
2999
3000 /* set up our bulk in urb */
3001 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3002 usb_rcvbulkpipe(dev,
3003 endpoint->bEndpointAddress),
3004 edge_serial->bulk_in_buffer,
3005 usb_endpoint_maxp(endpoint),
3006 edge_bulk_in_callback,
3007 edge_serial);
3008 bulk_in_found = true;
3009 }
3010
3011 if (!bulk_out_found &&
3012 (usb_endpoint_is_bulk_out(endpoint))) {
3013 /* we found a bulk out endpoint */
3014 dev_dbg(ddev, "found bulk out\n");
3015 edge_serial->bulk_out_endpoint =
3016 endpoint->bEndpointAddress;
3017 bulk_out_found = true;
3018 }
3019 }
3020
3021 if (response || !interrupt_in_found || !bulk_in_found ||
3022 !bulk_out_found) {
3023 if (!response) {
3024 dev_err(ddev, "expected endpoints not found\n");
3025 response = -ENODEV;
3026 }
3027
3028 usb_free_urb(edge_serial->interrupt_read_urb);
3029 kfree(edge_serial->interrupt_in_buffer);
3030
3031 usb_free_urb(edge_serial->read_urb);
3032 kfree(edge_serial->bulk_in_buffer);
3033
3034 kfree(edge_serial);
3035
3036 return response;
3037 }
3038
3039 /* start interrupt read for this edgeport this interrupt will
3040 * continue as long as the edgeport is connected */
3041 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3042 GFP_KERNEL);
3043 if (response)
3044 dev_err(ddev, "%s - Error %d submitting control urb\n",
3045 __func__, response);
3046 }
3047 return response;
3048 }
3049
3050
3051 /****************************************************************************
3052 * edge_disconnect
3053 * This function is called whenever the device is removed from the usb bus.
3054 ****************************************************************************/
edge_disconnect(struct usb_serial * serial)3055 static void edge_disconnect(struct usb_serial *serial)
3056 {
3057 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3058
3059 if (edge_serial->is_epic) {
3060 usb_kill_urb(edge_serial->interrupt_read_urb);
3061 usb_kill_urb(edge_serial->read_urb);
3062 }
3063 }
3064
3065
3066 /****************************************************************************
3067 * edge_release
3068 * This function is called when the device structure is deallocated.
3069 ****************************************************************************/
edge_release(struct usb_serial * serial)3070 static void edge_release(struct usb_serial *serial)
3071 {
3072 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3073
3074 if (edge_serial->is_epic) {
3075 usb_kill_urb(edge_serial->interrupt_read_urb);
3076 usb_free_urb(edge_serial->interrupt_read_urb);
3077 kfree(edge_serial->interrupt_in_buffer);
3078
3079 usb_kill_urb(edge_serial->read_urb);
3080 usb_free_urb(edge_serial->read_urb);
3081 kfree(edge_serial->bulk_in_buffer);
3082 }
3083
3084 kfree(edge_serial);
3085 }
3086
edge_port_probe(struct usb_serial_port * port)3087 static int edge_port_probe(struct usb_serial_port *port)
3088 {
3089 struct edgeport_port *edge_port;
3090
3091 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3092 if (!edge_port)
3093 return -ENOMEM;
3094
3095 spin_lock_init(&edge_port->ep_lock);
3096 edge_port->port = port;
3097
3098 usb_set_serial_port_data(port, edge_port);
3099
3100 return 0;
3101 }
3102
edge_port_remove(struct usb_serial_port * port)3103 static int edge_port_remove(struct usb_serial_port *port)
3104 {
3105 struct edgeport_port *edge_port;
3106
3107 edge_port = usb_get_serial_port_data(port);
3108 kfree(edge_port);
3109
3110 return 0;
3111 }
3112
3113 static struct usb_serial_driver edgeport_2port_device = {
3114 .driver = {
3115 .owner = THIS_MODULE,
3116 .name = "edgeport_2",
3117 },
3118 .description = "Edgeport 2 port adapter",
3119 .id_table = edgeport_2port_id_table,
3120 .num_ports = 2,
3121 .num_bulk_in = 1,
3122 .num_bulk_out = 1,
3123 .num_interrupt_in = 1,
3124 .open = edge_open,
3125 .close = edge_close,
3126 .throttle = edge_throttle,
3127 .unthrottle = edge_unthrottle,
3128 .attach = edge_startup,
3129 .disconnect = edge_disconnect,
3130 .release = edge_release,
3131 .port_probe = edge_port_probe,
3132 .port_remove = edge_port_remove,
3133 .ioctl = edge_ioctl,
3134 .set_termios = edge_set_termios,
3135 .tiocmget = edge_tiocmget,
3136 .tiocmset = edge_tiocmset,
3137 .tiocmiwait = usb_serial_generic_tiocmiwait,
3138 .get_icount = usb_serial_generic_get_icount,
3139 .write = edge_write,
3140 .write_room = edge_write_room,
3141 .chars_in_buffer = edge_chars_in_buffer,
3142 .break_ctl = edge_break,
3143 .read_int_callback = edge_interrupt_callback,
3144 .read_bulk_callback = edge_bulk_in_callback,
3145 .write_bulk_callback = edge_bulk_out_data_callback,
3146 };
3147
3148 static struct usb_serial_driver edgeport_4port_device = {
3149 .driver = {
3150 .owner = THIS_MODULE,
3151 .name = "edgeport_4",
3152 },
3153 .description = "Edgeport 4 port adapter",
3154 .id_table = edgeport_4port_id_table,
3155 .num_ports = 4,
3156 .num_bulk_in = 1,
3157 .num_bulk_out = 1,
3158 .num_interrupt_in = 1,
3159 .open = edge_open,
3160 .close = edge_close,
3161 .throttle = edge_throttle,
3162 .unthrottle = edge_unthrottle,
3163 .attach = edge_startup,
3164 .disconnect = edge_disconnect,
3165 .release = edge_release,
3166 .port_probe = edge_port_probe,
3167 .port_remove = edge_port_remove,
3168 .ioctl = edge_ioctl,
3169 .set_termios = edge_set_termios,
3170 .tiocmget = edge_tiocmget,
3171 .tiocmset = edge_tiocmset,
3172 .tiocmiwait = usb_serial_generic_tiocmiwait,
3173 .get_icount = usb_serial_generic_get_icount,
3174 .write = edge_write,
3175 .write_room = edge_write_room,
3176 .chars_in_buffer = edge_chars_in_buffer,
3177 .break_ctl = edge_break,
3178 .read_int_callback = edge_interrupt_callback,
3179 .read_bulk_callback = edge_bulk_in_callback,
3180 .write_bulk_callback = edge_bulk_out_data_callback,
3181 };
3182
3183 static struct usb_serial_driver edgeport_8port_device = {
3184 .driver = {
3185 .owner = THIS_MODULE,
3186 .name = "edgeport_8",
3187 },
3188 .description = "Edgeport 8 port adapter",
3189 .id_table = edgeport_8port_id_table,
3190 .num_ports = 8,
3191 .num_bulk_in = 1,
3192 .num_bulk_out = 1,
3193 .num_interrupt_in = 1,
3194 .open = edge_open,
3195 .close = edge_close,
3196 .throttle = edge_throttle,
3197 .unthrottle = edge_unthrottle,
3198 .attach = edge_startup,
3199 .disconnect = edge_disconnect,
3200 .release = edge_release,
3201 .port_probe = edge_port_probe,
3202 .port_remove = edge_port_remove,
3203 .ioctl = edge_ioctl,
3204 .set_termios = edge_set_termios,
3205 .tiocmget = edge_tiocmget,
3206 .tiocmset = edge_tiocmset,
3207 .tiocmiwait = usb_serial_generic_tiocmiwait,
3208 .get_icount = usb_serial_generic_get_icount,
3209 .write = edge_write,
3210 .write_room = edge_write_room,
3211 .chars_in_buffer = edge_chars_in_buffer,
3212 .break_ctl = edge_break,
3213 .read_int_callback = edge_interrupt_callback,
3214 .read_bulk_callback = edge_bulk_in_callback,
3215 .write_bulk_callback = edge_bulk_out_data_callback,
3216 };
3217
3218 static struct usb_serial_driver epic_device = {
3219 .driver = {
3220 .owner = THIS_MODULE,
3221 .name = "epic",
3222 },
3223 .description = "EPiC device",
3224 .id_table = Epic_port_id_table,
3225 .num_ports = 1,
3226 .num_bulk_in = 1,
3227 .num_bulk_out = 1,
3228 .num_interrupt_in = 1,
3229 .open = edge_open,
3230 .close = edge_close,
3231 .throttle = edge_throttle,
3232 .unthrottle = edge_unthrottle,
3233 .attach = edge_startup,
3234 .disconnect = edge_disconnect,
3235 .release = edge_release,
3236 .port_probe = edge_port_probe,
3237 .port_remove = edge_port_remove,
3238 .ioctl = edge_ioctl,
3239 .set_termios = edge_set_termios,
3240 .tiocmget = edge_tiocmget,
3241 .tiocmset = edge_tiocmset,
3242 .tiocmiwait = usb_serial_generic_tiocmiwait,
3243 .get_icount = usb_serial_generic_get_icount,
3244 .write = edge_write,
3245 .write_room = edge_write_room,
3246 .chars_in_buffer = edge_chars_in_buffer,
3247 .break_ctl = edge_break,
3248 .read_int_callback = edge_interrupt_callback,
3249 .read_bulk_callback = edge_bulk_in_callback,
3250 .write_bulk_callback = edge_bulk_out_data_callback,
3251 };
3252
3253 static struct usb_serial_driver * const serial_drivers[] = {
3254 &edgeport_2port_device, &edgeport_4port_device,
3255 &edgeport_8port_device, &epic_device, NULL
3256 };
3257
3258 module_usb_serial_driver(serial_drivers, id_table_combined);
3259
3260 MODULE_AUTHOR(DRIVER_AUTHOR);
3261 MODULE_DESCRIPTION(DRIVER_DESC);
3262 MODULE_LICENSE("GPL");
3263 MODULE_FIRMWARE("edgeport/boot.fw");
3264 MODULE_FIRMWARE("edgeport/boot2.fw");
3265 MODULE_FIRMWARE("edgeport/down.fw");
3266 MODULE_FIRMWARE("edgeport/down2.fw");
3267