1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Edgeport USB Serial Converter driver
4 *
5 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 *
8 * Supports the following devices:
9 * Edgeport/4
10 * Edgeport/4t
11 * Edgeport/2
12 * Edgeport/4i
13 * Edgeport/2i
14 * Edgeport/421
15 * Edgeport/21
16 * Rapidport/4
17 * Edgeport/8
18 * Edgeport/2D8
19 * Edgeport/4D8
20 * Edgeport/8i
21 *
22 * For questions or problems with this driver, contact Inside Out
23 * Networks technical support, or Peter Berger <pberger@brimson.com>,
24 * or Al Borchers <alborchers@steinerpoint.com>.
25 *
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/jiffies.h>
30 #include <linux/errno.h>
31 #include <linux/slab.h>
32 #include <linux/tty.h>
33 #include <linux/tty_driver.h>
34 #include <linux/tty_flip.h>
35 #include <linux/module.h>
36 #include <linux/spinlock.h>
37 #include <linux/serial.h>
38 #include <linux/ioctl.h>
39 #include <linux/wait.h>
40 #include <linux/firmware.h>
41 #include <linux/ihex.h>
42 #include <linux/uaccess.h>
43 #include <linux/usb.h>
44 #include <linux/usb/serial.h>
45 #include "io_edgeport.h"
46 #include "io_ionsp.h" /* info for the iosp messages */
47 #include "io_16654.h" /* 16654 UART defines */
48
49 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
50 #define DRIVER_DESC "Edgeport USB Serial Driver"
51
52 #define MAX_NAME_LEN 64
53
54 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
55
56 static const struct usb_device_id edgeport_2port_id_table[] = {
57 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
58 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
59 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
60 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
61 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
62 { }
63 };
64
65 static const struct usb_device_id edgeport_4port_id_table[] = {
66 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
67 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
68 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
69 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
70 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
71 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
72 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
73 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
74 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
75 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
76 { }
77 };
78
79 static const struct usb_device_id edgeport_8port_id_table[] = {
80 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
81 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
82 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
83 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
84 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
85 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
86 { }
87 };
88
89 static const struct usb_device_id Epic_port_id_table[] = {
90 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
91 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
92 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
93 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
94 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
95 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
96 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
97 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
98 { }
99 };
100
101 /* Devices that this driver supports */
102 static const struct usb_device_id id_table_combined[] = {
103 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
104 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
105 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
106 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
107 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
108 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
109 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
110 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
111 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
112 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
113 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
114 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
115 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
116 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
117 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
118 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
119 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
120 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
121 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
122 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
123 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
124 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
125 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
126 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
127 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
128 { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
129 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
130 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
131 { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
132 { } /* Terminating entry */
133 };
134
135 MODULE_DEVICE_TABLE(usb, id_table_combined);
136
137
138 /* receive port state */
139 enum RXSTATE {
140 EXPECT_HDR1 = 0, /* Expect header byte 1 */
141 EXPECT_HDR2 = 1, /* Expect header byte 2 */
142 EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */
143 EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */
144 };
145
146
147 /* Transmit Fifo
148 * This Transmit queue is an extension of the edgeport Rx buffer.
149 * The maximum amount of data buffered in both the edgeport
150 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
151 */
152 struct TxFifo {
153 unsigned int head; /* index to head pointer (write) */
154 unsigned int tail; /* index to tail pointer (read) */
155 unsigned int count; /* Bytes in queue */
156 unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */
157 unsigned char *fifo; /* allocated Buffer */
158 };
159
160 /* This structure holds all of the local port information */
161 struct edgeport_port {
162 __u16 txCredits; /* our current credits for this port */
163 __u16 maxTxCredits; /* the max size of the port */
164
165 struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */
166 struct urb *write_urb; /* write URB for this port */
167 bool write_in_progress; /* 'true' while a write URB is outstanding */
168 spinlock_t ep_lock;
169
170 __u8 shadowLCR; /* last LCR value received */
171 __u8 shadowMCR; /* last MCR value received */
172 __u8 shadowMSR; /* last MSR value received */
173 __u8 shadowLSR; /* last LSR value received */
174 __u8 shadowXonChar; /* last value set as XON char in Edgeport */
175 __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */
176 __u8 validDataMask;
177 __u32 baudRate;
178
179 bool open;
180 bool openPending;
181 bool commandPending;
182 bool closePending;
183 bool chaseResponsePending;
184
185 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
186 wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */
187 wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */
188
189 struct usb_serial_port *port; /* loop back to the owner of this object */
190 };
191
192
193 /* This structure holds all of the individual device information */
194 struct edgeport_serial {
195 char name[MAX_NAME_LEN+2]; /* string name of this device */
196
197 struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */
198 struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */
199 struct edgeport_product_info product_info; /* Product Info */
200 struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
201 int is_epic; /* flag if EPiC device or not */
202
203 __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */
204 unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */
205 struct urb *interrupt_read_urb; /* our interrupt urb */
206
207 __u8 bulk_in_endpoint; /* the bulk in endpoint handle */
208 unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */
209 struct urb *read_urb; /* our bulk read urb */
210 bool read_in_progress;
211 spinlock_t es_lock;
212
213 __u8 bulk_out_endpoint; /* the bulk out endpoint handle */
214
215 __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */
216
217 enum RXSTATE rxState; /* the current state of the bulk receive processor */
218 __u8 rxHeader1; /* receive header byte 1 */
219 __u8 rxHeader2; /* receive header byte 2 */
220 __u8 rxHeader3; /* receive header byte 3 */
221 __u8 rxPort; /* the port that we are currently receiving data for */
222 __u8 rxStatusCode; /* the receive status code */
223 __u8 rxStatusParam; /* the receive status paramater */
224 __s16 rxBytesRemaining; /* the number of port bytes left to read */
225 struct usb_serial *serial; /* loop back to the owner of this object */
226 };
227
228 /* baud rate information */
229 struct divisor_table_entry {
230 __u32 BaudRate;
231 __u16 Divisor;
232 };
233
234 /*
235 * Define table of divisors for Rev A EdgePort/4 hardware
236 * These assume a 3.6864MHz crystal, the standard /16, and
237 * MCR.7 = 0.
238 */
239
240 static const struct divisor_table_entry divisor_table[] = {
241 { 50, 4608},
242 { 75, 3072},
243 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
244 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
245 { 150, 1536},
246 { 300, 768},
247 { 600, 384},
248 { 1200, 192},
249 { 1800, 128},
250 { 2400, 96},
251 { 4800, 48},
252 { 7200, 32},
253 { 9600, 24},
254 { 14400, 16},
255 { 19200, 12},
256 { 38400, 6},
257 { 57600, 4},
258 { 115200, 2},
259 { 230400, 1},
260 };
261
262 /* Number of outstanding Command Write Urbs */
263 static atomic_t CmdUrbs = ATOMIC_INIT(0);
264
265
266 /* function prototypes */
267
268 static void edge_close(struct usb_serial_port *port);
269
270 static void process_rcvd_data(struct edgeport_serial *edge_serial,
271 unsigned char *buffer, __u16 bufferLength);
272 static void process_rcvd_status(struct edgeport_serial *edge_serial,
273 __u8 byte2, __u8 byte3);
274 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
275 int length);
276 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
277 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
278 __u8 lsr, __u8 data);
279 static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
280 __u8 param);
281 static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
282 static void change_port_settings(struct tty_struct *tty,
283 struct edgeport_port *edge_port,
284 struct ktermios *old_termios);
285 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
286 __u8 regNum, __u8 regValue);
287 static int write_cmd_usb(struct edgeport_port *edge_port,
288 unsigned char *buffer, int writeLength);
289 static void send_more_port_data(struct edgeport_serial *edge_serial,
290 struct edgeport_port *edge_port);
291
292 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
293 __u16 length, const __u8 *data);
294
295 /* ************************************************************************ */
296 /* ************************************************************************ */
297 /* ************************************************************************ */
298 /* ************************************************************************ */
299
300 /************************************************************************
301 * *
302 * update_edgeport_E2PROM() Compare current versions of *
303 * Boot ROM and Manufacture *
304 * Descriptors with versions *
305 * embedded in this driver *
306 * *
307 ************************************************************************/
update_edgeport_E2PROM(struct edgeport_serial * edge_serial)308 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
309 {
310 struct device *dev = &edge_serial->serial->dev->dev;
311 __u32 BootCurVer;
312 __u32 BootNewVer;
313 __u8 BootMajorVersion;
314 __u8 BootMinorVersion;
315 __u16 BootBuildNumber;
316 __u32 Bootaddr;
317 const struct ihex_binrec *rec;
318 const struct firmware *fw;
319 const char *fw_name;
320 int response;
321
322 switch (edge_serial->product_info.iDownloadFile) {
323 case EDGE_DOWNLOAD_FILE_I930:
324 fw_name = "edgeport/boot.fw";
325 break;
326 case EDGE_DOWNLOAD_FILE_80251:
327 fw_name = "edgeport/boot2.fw";
328 break;
329 default:
330 return;
331 }
332
333 response = request_ihex_firmware(&fw, fw_name,
334 &edge_serial->serial->dev->dev);
335 if (response) {
336 dev_err(dev, "Failed to load image \"%s\" err %d\n",
337 fw_name, response);
338 return;
339 }
340
341 rec = (const struct ihex_binrec *)fw->data;
342 BootMajorVersion = rec->data[0];
343 BootMinorVersion = rec->data[1];
344 BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
345
346 /* Check Boot Image Version */
347 BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
348 (edge_serial->boot_descriptor.MinorVersion << 16) +
349 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
350
351 BootNewVer = (BootMajorVersion << 24) +
352 (BootMinorVersion << 16) +
353 BootBuildNumber;
354
355 dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
356 edge_serial->boot_descriptor.MajorVersion,
357 edge_serial->boot_descriptor.MinorVersion,
358 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
359
360
361 if (BootNewVer > BootCurVer) {
362 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
363 edge_serial->boot_descriptor.MajorVersion,
364 edge_serial->boot_descriptor.MinorVersion,
365 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
366 BootMajorVersion, BootMinorVersion, BootBuildNumber);
367
368 dev_dbg(dev, "Downloading new Boot Image\n");
369
370 for (rec = ihex_next_binrec(rec); rec;
371 rec = ihex_next_binrec(rec)) {
372 Bootaddr = be32_to_cpu(rec->addr);
373 response = rom_write(edge_serial->serial,
374 Bootaddr >> 16,
375 Bootaddr & 0xFFFF,
376 be16_to_cpu(rec->len),
377 &rec->data[0]);
378 if (response < 0) {
379 dev_err(&edge_serial->serial->dev->dev,
380 "rom_write failed (%x, %x, %d)\n",
381 Bootaddr >> 16, Bootaddr & 0xFFFF,
382 be16_to_cpu(rec->len));
383 break;
384 }
385 }
386 } else {
387 dev_dbg(dev, "Boot Image -- already up to date\n");
388 }
389 release_firmware(fw);
390 }
391
392 #if 0
393 /************************************************************************
394 *
395 * Get string descriptor from device
396 *
397 ************************************************************************/
398 static int get_string_desc(struct usb_device *dev, int Id,
399 struct usb_string_descriptor **pRetDesc)
400 {
401 struct usb_string_descriptor StringDesc;
402 struct usb_string_descriptor *pStringDesc;
403
404 dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
405
406 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
407 sizeof(StringDesc)))
408 return 0;
409
410 pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
411 if (!pStringDesc)
412 return -1;
413
414 if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
415 StringDesc.bLength)) {
416 kfree(pStringDesc);
417 return -1;
418 }
419
420 *pRetDesc = pStringDesc;
421 return 0;
422 }
423 #endif
424
dump_product_info(struct edgeport_serial * edge_serial,struct edgeport_product_info * product_info)425 static void dump_product_info(struct edgeport_serial *edge_serial,
426 struct edgeport_product_info *product_info)
427 {
428 struct device *dev = &edge_serial->serial->dev->dev;
429
430 /* Dump Product Info structure */
431 dev_dbg(dev, "**Product Information:\n");
432 dev_dbg(dev, " ProductId %x\n", product_info->ProductId);
433 dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts);
434 dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer);
435 dev_dbg(dev, " IsServer %d\n", product_info->IsServer);
436 dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232);
437 dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422);
438 dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485);
439 dev_dbg(dev, " RomSize %d\n", product_info->RomSize);
440 dev_dbg(dev, " RamSize %d\n", product_info->RamSize);
441 dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev);
442 dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev);
443 dev_dbg(dev, " BootMajorVersion %d.%d.%d\n",
444 product_info->BootMajorVersion,
445 product_info->BootMinorVersion,
446 le16_to_cpu(product_info->BootBuildNumber));
447 dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n",
448 product_info->FirmwareMajorVersion,
449 product_info->FirmwareMinorVersion,
450 le16_to_cpu(product_info->FirmwareBuildNumber));
451 dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n",
452 product_info->ManufactureDescDate[0],
453 product_info->ManufactureDescDate[1],
454 product_info->ManufactureDescDate[2]+1900);
455 dev_dbg(dev, " iDownloadFile 0x%x\n",
456 product_info->iDownloadFile);
457 dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer);
458 }
459
get_product_info(struct edgeport_serial * edge_serial)460 static void get_product_info(struct edgeport_serial *edge_serial)
461 {
462 struct edgeport_product_info *product_info = &edge_serial->product_info;
463
464 memset(product_info, 0, sizeof(struct edgeport_product_info));
465
466 product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
467 product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
468 product_info->ProdInfoVer = 0;
469
470 product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
471 product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
472 product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
473 product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
474
475 product_info->BootMajorVersion =
476 edge_serial->boot_descriptor.MajorVersion;
477 product_info->BootMinorVersion =
478 edge_serial->boot_descriptor.MinorVersion;
479 product_info->BootBuildNumber =
480 edge_serial->boot_descriptor.BuildNumber;
481
482 memcpy(product_info->ManufactureDescDate,
483 edge_serial->manuf_descriptor.DescDate,
484 sizeof(edge_serial->manuf_descriptor.DescDate));
485
486 /* check if this is 2nd generation hardware */
487 if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
488 & ION_DEVICE_ID_80251_NETCHIP)
489 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
490 else
491 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
492
493 /* Determine Product type and set appropriate flags */
494 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
495 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
496 case ION_DEVICE_ID_EDGEPORT_4T:
497 case ION_DEVICE_ID_EDGEPORT_4:
498 case ION_DEVICE_ID_EDGEPORT_2:
499 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
500 case ION_DEVICE_ID_EDGEPORT_8:
501 case ION_DEVICE_ID_EDGEPORT_421:
502 case ION_DEVICE_ID_EDGEPORT_21:
503 case ION_DEVICE_ID_EDGEPORT_2_DIN:
504 case ION_DEVICE_ID_EDGEPORT_4_DIN:
505 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
506 product_info->IsRS232 = 1;
507 break;
508
509 case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
510 product_info->IsRS422 = 1;
511 product_info->IsRS485 = 1;
512 break;
513
514 case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
515 case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
516 product_info->IsRS422 = 1;
517 break;
518 }
519
520 dump_product_info(edge_serial, product_info);
521 }
522
get_epic_descriptor(struct edgeport_serial * ep)523 static int get_epic_descriptor(struct edgeport_serial *ep)
524 {
525 int result;
526 struct usb_serial *serial = ep->serial;
527 struct edgeport_product_info *product_info = &ep->product_info;
528 struct edge_compatibility_descriptor *epic;
529 struct edge_compatibility_bits *bits;
530 struct device *dev = &serial->dev->dev;
531
532 ep->is_epic = 0;
533
534 epic = kmalloc(sizeof(*epic), GFP_KERNEL);
535 if (!epic)
536 return -ENOMEM;
537
538 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
539 USB_REQUEST_ION_GET_EPIC_DESC,
540 0xC0, 0x00, 0x00,
541 epic, sizeof(*epic),
542 300);
543 if (result == sizeof(*epic)) {
544 ep->is_epic = 1;
545 memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
546 memset(product_info, 0, sizeof(struct edgeport_product_info));
547
548 product_info->NumPorts = epic->NumPorts;
549 product_info->ProdInfoVer = 0;
550 product_info->FirmwareMajorVersion = epic->MajorVersion;
551 product_info->FirmwareMinorVersion = epic->MinorVersion;
552 product_info->FirmwareBuildNumber = epic->BuildNumber;
553 product_info->iDownloadFile = epic->iDownloadFile;
554 product_info->EpicVer = epic->EpicVer;
555 product_info->Epic = epic->Supports;
556 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
557 dump_product_info(ep, product_info);
558
559 bits = &ep->epic_descriptor.Supports;
560 dev_dbg(dev, "**EPIC descriptor:\n");
561 dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
562 dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE");
563 dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE");
564 dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE");
565 dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
566 dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
567 dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE");
568 dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE");
569 dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
570 dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE");
571 dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE");
572 dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
573 dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE");
574
575 result = 0;
576 } else if (result >= 0) {
577 dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
578 result);
579 result = -EIO;
580 }
581
582 kfree(epic);
583
584 return result;
585 }
586
587
588 /************************************************************************/
589 /************************************************************************/
590 /* U S B C A L L B A C K F U N C T I O N S */
591 /* U S B C A L L B A C K F U N C T I O N S */
592 /************************************************************************/
593 /************************************************************************/
594
595 /*****************************************************************************
596 * edge_interrupt_callback
597 * this is the callback function for when we have received data on the
598 * interrupt endpoint.
599 *****************************************************************************/
edge_interrupt_callback(struct urb * urb)600 static void edge_interrupt_callback(struct urb *urb)
601 {
602 struct edgeport_serial *edge_serial = urb->context;
603 struct device *dev;
604 struct edgeport_port *edge_port;
605 struct usb_serial_port *port;
606 unsigned char *data = urb->transfer_buffer;
607 int length = urb->actual_length;
608 unsigned long flags;
609 int bytes_avail;
610 int position;
611 int txCredits;
612 int portNumber;
613 int result;
614 int status = urb->status;
615
616 switch (status) {
617 case 0:
618 /* success */
619 break;
620 case -ECONNRESET:
621 case -ENOENT:
622 case -ESHUTDOWN:
623 /* this urb is terminated, clean up */
624 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
625 return;
626 default:
627 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
628 goto exit;
629 }
630
631 dev = &edge_serial->serial->dev->dev;
632
633 /* process this interrupt-read even if there are no ports open */
634 if (length) {
635 usb_serial_debug_data(dev, __func__, length, data);
636
637 if (length > 1) {
638 bytes_avail = data[0] | (data[1] << 8);
639 if (bytes_avail) {
640 spin_lock_irqsave(&edge_serial->es_lock, flags);
641 edge_serial->rxBytesAvail += bytes_avail;
642 dev_dbg(dev,
643 "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
644 __func__, bytes_avail,
645 edge_serial->rxBytesAvail,
646 edge_serial->read_in_progress);
647
648 if (edge_serial->rxBytesAvail > 0 &&
649 !edge_serial->read_in_progress) {
650 dev_dbg(dev, "%s - posting a read\n", __func__);
651 edge_serial->read_in_progress = true;
652
653 /* we have pending bytes on the
654 bulk in pipe, send a request */
655 result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
656 if (result) {
657 dev_err(dev,
658 "%s - usb_submit_urb(read bulk) failed with result = %d\n",
659 __func__, result);
660 edge_serial->read_in_progress = false;
661 }
662 }
663 spin_unlock_irqrestore(&edge_serial->es_lock,
664 flags);
665 }
666 }
667 /* grab the txcredits for the ports if available */
668 position = 2;
669 portNumber = 0;
670 while ((position < length - 1) &&
671 (portNumber < edge_serial->serial->num_ports)) {
672 txCredits = data[position] | (data[position+1] << 8);
673 if (txCredits) {
674 port = edge_serial->serial->port[portNumber];
675 edge_port = usb_get_serial_port_data(port);
676 if (edge_port && edge_port->open) {
677 spin_lock_irqsave(&edge_port->ep_lock,
678 flags);
679 edge_port->txCredits += txCredits;
680 spin_unlock_irqrestore(&edge_port->ep_lock,
681 flags);
682 dev_dbg(dev, "%s - txcredits for port%d = %d\n",
683 __func__, portNumber,
684 edge_port->txCredits);
685
686 /* tell the tty driver that something
687 has changed */
688 tty_port_tty_wakeup(&edge_port->port->port);
689 /* Since we have more credit, check
690 if more data can be sent */
691 send_more_port_data(edge_serial,
692 edge_port);
693 }
694 }
695 position += 2;
696 ++portNumber;
697 }
698 }
699
700 exit:
701 result = usb_submit_urb(urb, GFP_ATOMIC);
702 if (result)
703 dev_err(&urb->dev->dev,
704 "%s - Error %d submitting control urb\n",
705 __func__, result);
706 }
707
708
709 /*****************************************************************************
710 * edge_bulk_in_callback
711 * this is the callback function for when we have received data on the
712 * bulk in endpoint.
713 *****************************************************************************/
edge_bulk_in_callback(struct urb * urb)714 static void edge_bulk_in_callback(struct urb *urb)
715 {
716 struct edgeport_serial *edge_serial = urb->context;
717 struct device *dev;
718 unsigned char *data = urb->transfer_buffer;
719 int retval;
720 __u16 raw_data_length;
721 int status = urb->status;
722 unsigned long flags;
723
724 if (status) {
725 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
726 __func__, status);
727 edge_serial->read_in_progress = false;
728 return;
729 }
730
731 if (urb->actual_length == 0) {
732 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
733 edge_serial->read_in_progress = false;
734 return;
735 }
736
737 dev = &edge_serial->serial->dev->dev;
738 raw_data_length = urb->actual_length;
739
740 usb_serial_debug_data(dev, __func__, raw_data_length, data);
741
742 spin_lock_irqsave(&edge_serial->es_lock, flags);
743
744 /* decrement our rxBytes available by the number that we just got */
745 edge_serial->rxBytesAvail -= raw_data_length;
746
747 dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
748 raw_data_length, edge_serial->rxBytesAvail);
749
750 process_rcvd_data(edge_serial, data, urb->actual_length);
751
752 /* check to see if there's any more data for us to read */
753 if (edge_serial->rxBytesAvail > 0) {
754 dev_dbg(dev, "%s - posting a read\n", __func__);
755 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
756 if (retval) {
757 dev_err(dev,
758 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
759 __func__, retval);
760 edge_serial->read_in_progress = false;
761 }
762 } else {
763 edge_serial->read_in_progress = false;
764 }
765
766 spin_unlock_irqrestore(&edge_serial->es_lock, flags);
767 }
768
769
770 /*****************************************************************************
771 * edge_bulk_out_data_callback
772 * this is the callback function for when we have finished sending
773 * serial data on the bulk out endpoint.
774 *****************************************************************************/
edge_bulk_out_data_callback(struct urb * urb)775 static void edge_bulk_out_data_callback(struct urb *urb)
776 {
777 struct edgeport_port *edge_port = urb->context;
778 int status = urb->status;
779
780 if (status) {
781 dev_dbg(&urb->dev->dev,
782 "%s - nonzero write bulk status received: %d\n",
783 __func__, status);
784 }
785
786 if (edge_port->open)
787 tty_port_tty_wakeup(&edge_port->port->port);
788
789 /* Release the Write URB */
790 edge_port->write_in_progress = false;
791
792 /* Check if more data needs to be sent */
793 send_more_port_data((struct edgeport_serial *)
794 (usb_get_serial_data(edge_port->port->serial)), edge_port);
795 }
796
797
798 /*****************************************************************************
799 * BulkOutCmdCallback
800 * this is the callback function for when we have finished sending a
801 * command on the bulk out endpoint.
802 *****************************************************************************/
edge_bulk_out_cmd_callback(struct urb * urb)803 static void edge_bulk_out_cmd_callback(struct urb *urb)
804 {
805 struct edgeport_port *edge_port = urb->context;
806 int status = urb->status;
807
808 atomic_dec(&CmdUrbs);
809 dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
810 __func__, urb, atomic_read(&CmdUrbs));
811
812
813 /* clean up the transfer buffer */
814 kfree(urb->transfer_buffer);
815
816 /* Free the command urb */
817 usb_free_urb(urb);
818
819 if (status) {
820 dev_dbg(&urb->dev->dev,
821 "%s - nonzero write bulk status received: %d\n",
822 __func__, status);
823 return;
824 }
825
826 /* tell the tty driver that something has changed */
827 if (edge_port->open)
828 tty_port_tty_wakeup(&edge_port->port->port);
829
830 /* we have completed the command */
831 edge_port->commandPending = false;
832 wake_up(&edge_port->wait_command);
833 }
834
835
836 /*****************************************************************************
837 * Driver tty interface functions
838 *****************************************************************************/
839
840 /*****************************************************************************
841 * SerialOpen
842 * this function is called by the tty driver when a port is opened
843 * If successful, we return 0
844 * Otherwise we return a negative error number.
845 *****************************************************************************/
edge_open(struct tty_struct * tty,struct usb_serial_port * port)846 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
847 {
848 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
849 struct device *dev = &port->dev;
850 struct usb_serial *serial;
851 struct edgeport_serial *edge_serial;
852 int response;
853
854 if (edge_port == NULL)
855 return -ENODEV;
856
857 /* see if we've set up our endpoint info yet (can't set it up
858 in edge_startup as the structures were not set up at that time.) */
859 serial = port->serial;
860 edge_serial = usb_get_serial_data(serial);
861 if (edge_serial == NULL)
862 return -ENODEV;
863 if (edge_serial->interrupt_in_buffer == NULL) {
864 struct usb_serial_port *port0 = serial->port[0];
865
866 /* not set up yet, so do it now */
867 edge_serial->interrupt_in_buffer =
868 port0->interrupt_in_buffer;
869 edge_serial->interrupt_in_endpoint =
870 port0->interrupt_in_endpointAddress;
871 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
872 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
873 edge_serial->bulk_in_endpoint =
874 port0->bulk_in_endpointAddress;
875 edge_serial->read_urb = port0->read_urb;
876 edge_serial->bulk_out_endpoint =
877 port0->bulk_out_endpointAddress;
878
879 /* set up our interrupt urb */
880 usb_fill_int_urb(edge_serial->interrupt_read_urb,
881 serial->dev,
882 usb_rcvintpipe(serial->dev,
883 port0->interrupt_in_endpointAddress),
884 port0->interrupt_in_buffer,
885 edge_serial->interrupt_read_urb->transfer_buffer_length,
886 edge_interrupt_callback, edge_serial,
887 edge_serial->interrupt_read_urb->interval);
888
889 /* set up our bulk in urb */
890 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
891 usb_rcvbulkpipe(serial->dev,
892 port0->bulk_in_endpointAddress),
893 port0->bulk_in_buffer,
894 edge_serial->read_urb->transfer_buffer_length,
895 edge_bulk_in_callback, edge_serial);
896 edge_serial->read_in_progress = false;
897
898 /* start interrupt read for this edgeport
899 * this interrupt will continue as long
900 * as the edgeport is connected */
901 response = usb_submit_urb(edge_serial->interrupt_read_urb,
902 GFP_KERNEL);
903 if (response) {
904 dev_err(dev, "%s - Error %d submitting control urb\n",
905 __func__, response);
906 }
907 }
908
909 /* initialize our wait queues */
910 init_waitqueue_head(&edge_port->wait_open);
911 init_waitqueue_head(&edge_port->wait_chase);
912 init_waitqueue_head(&edge_port->wait_command);
913
914 /* initialize our port settings */
915 edge_port->txCredits = 0; /* Can't send any data yet */
916 /* Must always set this bit to enable ints! */
917 edge_port->shadowMCR = MCR_MASTER_IE;
918 edge_port->chaseResponsePending = false;
919
920 /* send a open port command */
921 edge_port->openPending = true;
922 edge_port->open = false;
923 response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
924
925 if (response < 0) {
926 dev_err(dev, "%s - error sending open port command\n", __func__);
927 edge_port->openPending = false;
928 return -ENODEV;
929 }
930
931 /* now wait for the port to be completely opened */
932 wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
933 OPEN_TIMEOUT);
934
935 if (!edge_port->open) {
936 /* open timed out */
937 dev_dbg(dev, "%s - open timedout\n", __func__);
938 edge_port->openPending = false;
939 return -ENODEV;
940 }
941
942 /* create the txfifo */
943 edge_port->txfifo.head = 0;
944 edge_port->txfifo.tail = 0;
945 edge_port->txfifo.count = 0;
946 edge_port->txfifo.size = edge_port->maxTxCredits;
947 edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
948
949 if (!edge_port->txfifo.fifo) {
950 edge_close(port);
951 return -ENOMEM;
952 }
953
954 /* Allocate a URB for the write */
955 edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
956 edge_port->write_in_progress = false;
957
958 if (!edge_port->write_urb) {
959 edge_close(port);
960 return -ENOMEM;
961 }
962
963 dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
964 __func__, edge_port->maxTxCredits);
965
966 return 0;
967 }
968
969
970 /************************************************************************
971 *
972 * block_until_chase_response
973 *
974 * This function will block the close until one of the following:
975 * 1. Response to our Chase comes from Edgeport
976 * 2. A timeout of 10 seconds without activity has expired
977 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
978 *
979 ************************************************************************/
block_until_chase_response(struct edgeport_port * edge_port)980 static void block_until_chase_response(struct edgeport_port *edge_port)
981 {
982 struct device *dev = &edge_port->port->dev;
983 DEFINE_WAIT(wait);
984 __u16 lastCredits;
985 int timeout = 1*HZ;
986 int loop = 10;
987
988 while (1) {
989 /* Save Last credits */
990 lastCredits = edge_port->txCredits;
991
992 /* Did we get our Chase response */
993 if (!edge_port->chaseResponsePending) {
994 dev_dbg(dev, "%s - Got Chase Response\n", __func__);
995
996 /* did we get all of our credit back? */
997 if (edge_port->txCredits == edge_port->maxTxCredits) {
998 dev_dbg(dev, "%s - Got all credits\n", __func__);
999 return;
1000 }
1001 }
1002
1003 /* Block the thread for a while */
1004 prepare_to_wait(&edge_port->wait_chase, &wait,
1005 TASK_UNINTERRUPTIBLE);
1006 schedule_timeout(timeout);
1007 finish_wait(&edge_port->wait_chase, &wait);
1008
1009 if (lastCredits == edge_port->txCredits) {
1010 /* No activity.. count down. */
1011 loop--;
1012 if (loop == 0) {
1013 edge_port->chaseResponsePending = false;
1014 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
1015 return;
1016 }
1017 } else {
1018 /* Reset timeout value back to 10 seconds */
1019 dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
1020 lastCredits, edge_port->txCredits);
1021 loop = 10;
1022 }
1023 }
1024 }
1025
1026
1027 /************************************************************************
1028 *
1029 * block_until_tx_empty
1030 *
1031 * This function will block the close until one of the following:
1032 * 1. TX count are 0
1033 * 2. The edgeport has stopped
1034 * 3. A timeout of 3 seconds without activity has expired
1035 *
1036 ************************************************************************/
block_until_tx_empty(struct edgeport_port * edge_port)1037 static void block_until_tx_empty(struct edgeport_port *edge_port)
1038 {
1039 struct device *dev = &edge_port->port->dev;
1040 DEFINE_WAIT(wait);
1041 struct TxFifo *fifo = &edge_port->txfifo;
1042 __u32 lastCount;
1043 int timeout = HZ/10;
1044 int loop = 30;
1045
1046 while (1) {
1047 /* Save Last count */
1048 lastCount = fifo->count;
1049
1050 /* Is the Edgeport Buffer empty? */
1051 if (lastCount == 0) {
1052 dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1053 return;
1054 }
1055
1056 /* Block the thread for a while */
1057 prepare_to_wait(&edge_port->wait_chase, &wait,
1058 TASK_UNINTERRUPTIBLE);
1059 schedule_timeout(timeout);
1060 finish_wait(&edge_port->wait_chase, &wait);
1061
1062 dev_dbg(dev, "%s wait\n", __func__);
1063
1064 if (lastCount == fifo->count) {
1065 /* No activity.. count down. */
1066 loop--;
1067 if (loop == 0) {
1068 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1069 return;
1070 }
1071 } else {
1072 /* Reset timeout value back to seconds */
1073 loop = 30;
1074 }
1075 }
1076 }
1077
1078
1079 /*****************************************************************************
1080 * edge_close
1081 * this function is called by the tty driver when a port is closed
1082 *****************************************************************************/
edge_close(struct usb_serial_port * port)1083 static void edge_close(struct usb_serial_port *port)
1084 {
1085 struct edgeport_serial *edge_serial;
1086 struct edgeport_port *edge_port;
1087 int status;
1088
1089 edge_serial = usb_get_serial_data(port->serial);
1090 edge_port = usb_get_serial_port_data(port);
1091 if (edge_serial == NULL || edge_port == NULL)
1092 return;
1093
1094 /* block until tx is empty */
1095 block_until_tx_empty(edge_port);
1096
1097 edge_port->closePending = true;
1098
1099 if (!edge_serial->is_epic ||
1100 edge_serial->epic_descriptor.Supports.IOSPChase) {
1101 /* flush and chase */
1102 edge_port->chaseResponsePending = true;
1103
1104 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1105 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1106 if (status == 0)
1107 /* block until chase finished */
1108 block_until_chase_response(edge_port);
1109 else
1110 edge_port->chaseResponsePending = false;
1111 }
1112
1113 if (!edge_serial->is_epic ||
1114 edge_serial->epic_descriptor.Supports.IOSPClose) {
1115 /* close the port */
1116 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1117 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1118 }
1119
1120 /* port->close = true; */
1121 edge_port->closePending = false;
1122 edge_port->open = false;
1123 edge_port->openPending = false;
1124
1125 usb_kill_urb(edge_port->write_urb);
1126
1127 if (edge_port->write_urb) {
1128 /* if this urb had a transfer buffer already
1129 (old transfer) free it */
1130 kfree(edge_port->write_urb->transfer_buffer);
1131 usb_free_urb(edge_port->write_urb);
1132 edge_port->write_urb = NULL;
1133 }
1134 kfree(edge_port->txfifo.fifo);
1135 edge_port->txfifo.fifo = NULL;
1136 }
1137
1138 /*****************************************************************************
1139 * SerialWrite
1140 * this function is called by the tty driver when data should be written
1141 * to the port.
1142 * If successful, we return the number of bytes written, otherwise we
1143 * return a negative error number.
1144 *****************************************************************************/
edge_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * data,int count)1145 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1146 const unsigned char *data, int count)
1147 {
1148 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1149 struct TxFifo *fifo;
1150 int copySize;
1151 int bytesleft;
1152 int firsthalf;
1153 int secondhalf;
1154 unsigned long flags;
1155
1156 if (edge_port == NULL)
1157 return -ENODEV;
1158
1159 /* get a pointer to the Tx fifo */
1160 fifo = &edge_port->txfifo;
1161
1162 spin_lock_irqsave(&edge_port->ep_lock, flags);
1163
1164 /* calculate number of bytes to put in fifo */
1165 copySize = min((unsigned int)count,
1166 (edge_port->txCredits - fifo->count));
1167
1168 dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n",
1169 __func__, count, edge_port->txCredits - fifo->count, copySize);
1170
1171 /* catch writes of 0 bytes which the tty driver likes to give us,
1172 and when txCredits is empty */
1173 if (copySize == 0) {
1174 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1175 goto finish_write;
1176 }
1177
1178 /* queue the data
1179 * since we can never overflow the buffer we do not have to check for a
1180 * full condition
1181 *
1182 * the copy is done is two parts -- first fill to the end of the buffer
1183 * then copy the reset from the start of the buffer
1184 */
1185 bytesleft = fifo->size - fifo->head;
1186 firsthalf = min(bytesleft, copySize);
1187 dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1188 firsthalf, bytesleft);
1189
1190 /* now copy our data */
1191 memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1192 usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1193
1194 /* update the index and size */
1195 fifo->head += firsthalf;
1196 fifo->count += firsthalf;
1197
1198 /* wrap the index */
1199 if (fifo->head == fifo->size)
1200 fifo->head = 0;
1201
1202 secondhalf = copySize-firsthalf;
1203
1204 if (secondhalf) {
1205 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1206 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1207 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1208 /* update the index and size */
1209 fifo->count += secondhalf;
1210 fifo->head += secondhalf;
1211 /* No need to check for wrap since we can not get to end of
1212 * the fifo in this part
1213 */
1214 }
1215
1216 finish_write:
1217 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1218
1219 send_more_port_data((struct edgeport_serial *)
1220 usb_get_serial_data(port->serial), edge_port);
1221
1222 dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1223 __func__, copySize, edge_port->txCredits, fifo->count);
1224
1225 return copySize;
1226 }
1227
1228
1229 /************************************************************************
1230 *
1231 * send_more_port_data()
1232 *
1233 * This routine attempts to write additional UART transmit data
1234 * to a port over the USB bulk pipe. It is called (1) when new
1235 * data has been written to a port's TxBuffer from higher layers
1236 * (2) when the peripheral sends us additional TxCredits indicating
1237 * that it can accept more Tx data for a given port; and (3) when
1238 * a bulk write completes successfully and we want to see if we
1239 * can transmit more.
1240 *
1241 ************************************************************************/
send_more_port_data(struct edgeport_serial * edge_serial,struct edgeport_port * edge_port)1242 static void send_more_port_data(struct edgeport_serial *edge_serial,
1243 struct edgeport_port *edge_port)
1244 {
1245 struct TxFifo *fifo = &edge_port->txfifo;
1246 struct device *dev = &edge_port->port->dev;
1247 struct urb *urb;
1248 unsigned char *buffer;
1249 int status;
1250 int count;
1251 int bytesleft;
1252 int firsthalf;
1253 int secondhalf;
1254 unsigned long flags;
1255
1256 spin_lock_irqsave(&edge_port->ep_lock, flags);
1257
1258 if (edge_port->write_in_progress ||
1259 !edge_port->open ||
1260 (fifo->count == 0)) {
1261 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1262 __func__, fifo->count, edge_port->write_in_progress);
1263 goto exit_send;
1264 }
1265
1266 /* since the amount of data in the fifo will always fit into the
1267 * edgeport buffer we do not need to check the write length
1268 *
1269 * Do we have enough credits for this port to make it worthwhile
1270 * to bother queueing a write. If it's too small, say a few bytes,
1271 * it's better to wait for more credits so we can do a larger write.
1272 */
1273 if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1274 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1275 __func__, fifo->count, edge_port->txCredits);
1276 goto exit_send;
1277 }
1278
1279 /* lock this write */
1280 edge_port->write_in_progress = true;
1281
1282 /* get a pointer to the write_urb */
1283 urb = edge_port->write_urb;
1284
1285 /* make sure transfer buffer is freed */
1286 kfree(urb->transfer_buffer);
1287 urb->transfer_buffer = NULL;
1288
1289 /* build the data header for the buffer and port that we are about
1290 to send out */
1291 count = fifo->count;
1292 buffer = kmalloc(count+2, GFP_ATOMIC);
1293 if (!buffer) {
1294 edge_port->write_in_progress = false;
1295 goto exit_send;
1296 }
1297 buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1298 buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1299
1300 /* now copy our data */
1301 bytesleft = fifo->size - fifo->tail;
1302 firsthalf = min(bytesleft, count);
1303 memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1304 fifo->tail += firsthalf;
1305 fifo->count -= firsthalf;
1306 if (fifo->tail == fifo->size)
1307 fifo->tail = 0;
1308
1309 secondhalf = count-firsthalf;
1310 if (secondhalf) {
1311 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1312 secondhalf);
1313 fifo->tail += secondhalf;
1314 fifo->count -= secondhalf;
1315 }
1316
1317 if (count)
1318 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1319
1320 /* fill up the urb with all of our data and submit it */
1321 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1322 usb_sndbulkpipe(edge_serial->serial->dev,
1323 edge_serial->bulk_out_endpoint),
1324 buffer, count+2,
1325 edge_bulk_out_data_callback, edge_port);
1326
1327 /* decrement the number of credits we have by the number we just sent */
1328 edge_port->txCredits -= count;
1329 edge_port->port->icount.tx += count;
1330
1331 status = usb_submit_urb(urb, GFP_ATOMIC);
1332 if (status) {
1333 /* something went wrong */
1334 dev_err_console(edge_port->port,
1335 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1336 __func__, status);
1337 edge_port->write_in_progress = false;
1338
1339 /* revert the credits as something bad happened. */
1340 edge_port->txCredits += count;
1341 edge_port->port->icount.tx -= count;
1342 }
1343 dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1344 __func__, count, edge_port->txCredits, fifo->count);
1345
1346 exit_send:
1347 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1348 }
1349
1350
1351 /*****************************************************************************
1352 * edge_write_room
1353 * this function is called by the tty driver when it wants to know how
1354 * many bytes of data we can accept for a specific port. If successful,
1355 * we return the amount of room that we have for this port (the txCredits)
1356 * otherwise we return a negative error number.
1357 *****************************************************************************/
edge_write_room(struct tty_struct * tty)1358 static int edge_write_room(struct tty_struct *tty)
1359 {
1360 struct usb_serial_port *port = tty->driver_data;
1361 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1362 int room;
1363 unsigned long flags;
1364
1365 if (edge_port == NULL)
1366 return 0;
1367 if (edge_port->closePending)
1368 return 0;
1369
1370 if (!edge_port->open) {
1371 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1372 return 0;
1373 }
1374
1375 /* total of both buffers is still txCredit */
1376 spin_lock_irqsave(&edge_port->ep_lock, flags);
1377 room = edge_port->txCredits - edge_port->txfifo.count;
1378 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1379
1380 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1381 return room;
1382 }
1383
1384
1385 /*****************************************************************************
1386 * edge_chars_in_buffer
1387 * this function is called by the tty driver when it wants to know how
1388 * many bytes of data we currently have outstanding in the port (data that
1389 * has been written, but hasn't made it out the port yet)
1390 * If successful, we return the number of bytes left to be written in the
1391 * system,
1392 * Otherwise we return a negative error number.
1393 *****************************************************************************/
edge_chars_in_buffer(struct tty_struct * tty)1394 static int edge_chars_in_buffer(struct tty_struct *tty)
1395 {
1396 struct usb_serial_port *port = tty->driver_data;
1397 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1398 int num_chars;
1399 unsigned long flags;
1400
1401 if (edge_port == NULL)
1402 return 0;
1403 if (edge_port->closePending)
1404 return 0;
1405
1406 if (!edge_port->open) {
1407 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1408 return 0;
1409 }
1410
1411 spin_lock_irqsave(&edge_port->ep_lock, flags);
1412 num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1413 edge_port->txfifo.count;
1414 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1415 if (num_chars) {
1416 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1417 }
1418
1419 return num_chars;
1420 }
1421
1422
1423 /*****************************************************************************
1424 * SerialThrottle
1425 * this function is called by the tty driver when it wants to stop the data
1426 * being read from the port.
1427 *****************************************************************************/
edge_throttle(struct tty_struct * tty)1428 static void edge_throttle(struct tty_struct *tty)
1429 {
1430 struct usb_serial_port *port = tty->driver_data;
1431 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1432 int status;
1433
1434 if (edge_port == NULL)
1435 return;
1436
1437 if (!edge_port->open) {
1438 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1439 return;
1440 }
1441
1442 /* if we are implementing XON/XOFF, send the stop character */
1443 if (I_IXOFF(tty)) {
1444 unsigned char stop_char = STOP_CHAR(tty);
1445 status = edge_write(tty, port, &stop_char, 1);
1446 if (status <= 0)
1447 return;
1448 }
1449
1450 /* if we are implementing RTS/CTS, toggle that line */
1451 if (C_CRTSCTS(tty)) {
1452 edge_port->shadowMCR &= ~MCR_RTS;
1453 status = send_cmd_write_uart_register(edge_port, MCR,
1454 edge_port->shadowMCR);
1455 if (status != 0)
1456 return;
1457 }
1458 }
1459
1460
1461 /*****************************************************************************
1462 * edge_unthrottle
1463 * this function is called by the tty driver when it wants to resume the
1464 * data being read from the port (called after SerialThrottle is called)
1465 *****************************************************************************/
edge_unthrottle(struct tty_struct * tty)1466 static void edge_unthrottle(struct tty_struct *tty)
1467 {
1468 struct usb_serial_port *port = tty->driver_data;
1469 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1470 int status;
1471
1472 if (edge_port == NULL)
1473 return;
1474
1475 if (!edge_port->open) {
1476 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1477 return;
1478 }
1479
1480 /* if we are implementing XON/XOFF, send the start character */
1481 if (I_IXOFF(tty)) {
1482 unsigned char start_char = START_CHAR(tty);
1483 status = edge_write(tty, port, &start_char, 1);
1484 if (status <= 0)
1485 return;
1486 }
1487 /* if we are implementing RTS/CTS, toggle that line */
1488 if (C_CRTSCTS(tty)) {
1489 edge_port->shadowMCR |= MCR_RTS;
1490 send_cmd_write_uart_register(edge_port, MCR,
1491 edge_port->shadowMCR);
1492 }
1493 }
1494
1495
1496 /*****************************************************************************
1497 * SerialSetTermios
1498 * this function is called by the tty driver when it wants to change
1499 * the termios structure
1500 *****************************************************************************/
edge_set_termios(struct tty_struct * tty,struct usb_serial_port * port,struct ktermios * old_termios)1501 static void edge_set_termios(struct tty_struct *tty,
1502 struct usb_serial_port *port, struct ktermios *old_termios)
1503 {
1504 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1505
1506 if (edge_port == NULL)
1507 return;
1508
1509 if (!edge_port->open) {
1510 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1511 return;
1512 }
1513
1514 /* change the port settings to the new ones specified */
1515 change_port_settings(tty, edge_port, old_termios);
1516 }
1517
1518
1519 /*****************************************************************************
1520 * get_lsr_info - get line status register info
1521 *
1522 * Purpose: Let user call ioctl() to get info when the UART physically
1523 * is emptied. On bus types like RS485, the transmitter must
1524 * release the bus after transmitting. This must be done when
1525 * the transmit shift register is empty, not be done when the
1526 * transmit holding register is empty. This functionality
1527 * allows an RS485 driver to be written in user space.
1528 *****************************************************************************/
get_lsr_info(struct edgeport_port * edge_port,unsigned int __user * value)1529 static int get_lsr_info(struct edgeport_port *edge_port,
1530 unsigned int __user *value)
1531 {
1532 unsigned int result = 0;
1533 unsigned long flags;
1534
1535 spin_lock_irqsave(&edge_port->ep_lock, flags);
1536 if (edge_port->maxTxCredits == edge_port->txCredits &&
1537 edge_port->txfifo.count == 0) {
1538 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1539 result = TIOCSER_TEMT;
1540 }
1541 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1542
1543 if (copy_to_user(value, &result, sizeof(int)))
1544 return -EFAULT;
1545 return 0;
1546 }
1547
edge_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1548 static int edge_tiocmset(struct tty_struct *tty,
1549 unsigned int set, unsigned int clear)
1550 {
1551 struct usb_serial_port *port = tty->driver_data;
1552 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1553 unsigned int mcr;
1554
1555 mcr = edge_port->shadowMCR;
1556 if (set & TIOCM_RTS)
1557 mcr |= MCR_RTS;
1558 if (set & TIOCM_DTR)
1559 mcr |= MCR_DTR;
1560 if (set & TIOCM_LOOP)
1561 mcr |= MCR_LOOPBACK;
1562
1563 if (clear & TIOCM_RTS)
1564 mcr &= ~MCR_RTS;
1565 if (clear & TIOCM_DTR)
1566 mcr &= ~MCR_DTR;
1567 if (clear & TIOCM_LOOP)
1568 mcr &= ~MCR_LOOPBACK;
1569
1570 edge_port->shadowMCR = mcr;
1571
1572 send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1573
1574 return 0;
1575 }
1576
edge_tiocmget(struct tty_struct * tty)1577 static int edge_tiocmget(struct tty_struct *tty)
1578 {
1579 struct usb_serial_port *port = tty->driver_data;
1580 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1581 unsigned int result = 0;
1582 unsigned int msr;
1583 unsigned int mcr;
1584
1585 msr = edge_port->shadowMSR;
1586 mcr = edge_port->shadowMCR;
1587 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
1588 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
1589 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
1590 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
1591 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
1592 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
1593
1594 return result;
1595 }
1596
1597 /*****************************************************************************
1598 * SerialIoctl
1599 * this function handles any ioctl calls to the driver
1600 *****************************************************************************/
edge_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)1601 static int edge_ioctl(struct tty_struct *tty,
1602 unsigned int cmd, unsigned long arg)
1603 {
1604 struct usb_serial_port *port = tty->driver_data;
1605 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1606
1607 switch (cmd) {
1608 case TIOCSERGETLSR:
1609 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1610 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1611 }
1612 return -ENOIOCTLCMD;
1613 }
1614
1615
1616 /*****************************************************************************
1617 * SerialBreak
1618 * this function sends a break to the port
1619 *****************************************************************************/
edge_break(struct tty_struct * tty,int break_state)1620 static void edge_break(struct tty_struct *tty, int break_state)
1621 {
1622 struct usb_serial_port *port = tty->driver_data;
1623 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1624 struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1625 int status;
1626
1627 if (!edge_serial->is_epic ||
1628 edge_serial->epic_descriptor.Supports.IOSPChase) {
1629 /* flush and chase */
1630 edge_port->chaseResponsePending = true;
1631
1632 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1633 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1634 if (status == 0) {
1635 /* block until chase finished */
1636 block_until_chase_response(edge_port);
1637 } else {
1638 edge_port->chaseResponsePending = false;
1639 }
1640 }
1641
1642 if (!edge_serial->is_epic ||
1643 edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1644 if (break_state == -1) {
1645 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1646 status = send_iosp_ext_cmd(edge_port,
1647 IOSP_CMD_SET_BREAK, 0);
1648 } else {
1649 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1650 status = send_iosp_ext_cmd(edge_port,
1651 IOSP_CMD_CLEAR_BREAK, 0);
1652 }
1653 if (status)
1654 dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1655 __func__);
1656 }
1657 }
1658
1659
1660 /*****************************************************************************
1661 * process_rcvd_data
1662 * this function handles the data received on the bulk in pipe.
1663 *****************************************************************************/
process_rcvd_data(struct edgeport_serial * edge_serial,unsigned char * buffer,__u16 bufferLength)1664 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1665 unsigned char *buffer, __u16 bufferLength)
1666 {
1667 struct usb_serial *serial = edge_serial->serial;
1668 struct device *dev = &serial->dev->dev;
1669 struct usb_serial_port *port;
1670 struct edgeport_port *edge_port;
1671 __u16 lastBufferLength;
1672 __u16 rxLen;
1673
1674 lastBufferLength = bufferLength + 1;
1675
1676 while (bufferLength > 0) {
1677 /* failsafe incase we get a message that we don't understand */
1678 if (lastBufferLength == bufferLength) {
1679 dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1680 break;
1681 }
1682 lastBufferLength = bufferLength;
1683
1684 switch (edge_serial->rxState) {
1685 case EXPECT_HDR1:
1686 edge_serial->rxHeader1 = *buffer;
1687 ++buffer;
1688 --bufferLength;
1689
1690 if (bufferLength == 0) {
1691 edge_serial->rxState = EXPECT_HDR2;
1692 break;
1693 }
1694 fallthrough;
1695 case EXPECT_HDR2:
1696 edge_serial->rxHeader2 = *buffer;
1697 ++buffer;
1698 --bufferLength;
1699
1700 dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1701 edge_serial->rxHeader1, edge_serial->rxHeader2);
1702 /* Process depending on whether this header is
1703 * data or status */
1704
1705 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1706 /* Decode this status header and go to
1707 * EXPECT_HDR1 (if we can process the status
1708 * with only 2 bytes), or go to EXPECT_HDR3 to
1709 * get the third byte. */
1710 edge_serial->rxPort =
1711 IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1712 edge_serial->rxStatusCode =
1713 IOSP_GET_STATUS_CODE(
1714 edge_serial->rxHeader1);
1715
1716 if (!IOSP_STATUS_IS_2BYTE(
1717 edge_serial->rxStatusCode)) {
1718 /* This status needs additional bytes.
1719 * Save what we have and then wait for
1720 * more data.
1721 */
1722 edge_serial->rxStatusParam
1723 = edge_serial->rxHeader2;
1724 edge_serial->rxState = EXPECT_HDR3;
1725 break;
1726 }
1727 /* We have all the header bytes, process the
1728 status now */
1729 process_rcvd_status(edge_serial,
1730 edge_serial->rxHeader2, 0);
1731 edge_serial->rxState = EXPECT_HDR1;
1732 break;
1733 }
1734
1735 edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1736 edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1,
1737 edge_serial->rxHeader2);
1738 dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__,
1739 edge_serial->rxPort,
1740 edge_serial->rxBytesRemaining);
1741
1742 if (bufferLength == 0) {
1743 edge_serial->rxState = EXPECT_DATA;
1744 break;
1745 }
1746 fallthrough;
1747 case EXPECT_DATA: /* Expect data */
1748 if (bufferLength < edge_serial->rxBytesRemaining) {
1749 rxLen = bufferLength;
1750 /* Expect data to start next buffer */
1751 edge_serial->rxState = EXPECT_DATA;
1752 } else {
1753 /* BufLen >= RxBytesRemaining */
1754 rxLen = edge_serial->rxBytesRemaining;
1755 /* Start another header next time */
1756 edge_serial->rxState = EXPECT_HDR1;
1757 }
1758
1759 bufferLength -= rxLen;
1760 edge_serial->rxBytesRemaining -= rxLen;
1761
1762 /* spit this data back into the tty driver if this
1763 port is open */
1764 if (rxLen && edge_serial->rxPort < serial->num_ports) {
1765 port = serial->port[edge_serial->rxPort];
1766 edge_port = usb_get_serial_port_data(port);
1767 if (edge_port && edge_port->open) {
1768 dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1769 __func__, rxLen,
1770 edge_serial->rxPort);
1771 edge_tty_recv(edge_port->port, buffer,
1772 rxLen);
1773 edge_port->port->icount.rx += rxLen;
1774 }
1775 }
1776 buffer += rxLen;
1777 break;
1778
1779 case EXPECT_HDR3: /* Expect 3rd byte of status header */
1780 edge_serial->rxHeader3 = *buffer;
1781 ++buffer;
1782 --bufferLength;
1783
1784 /* We have all the header bytes, process the
1785 status now */
1786 process_rcvd_status(edge_serial,
1787 edge_serial->rxStatusParam,
1788 edge_serial->rxHeader3);
1789 edge_serial->rxState = EXPECT_HDR1;
1790 break;
1791 }
1792 }
1793 }
1794
1795
1796 /*****************************************************************************
1797 * process_rcvd_status
1798 * this function handles the any status messages received on the
1799 * bulk in pipe.
1800 *****************************************************************************/
process_rcvd_status(struct edgeport_serial * edge_serial,__u8 byte2,__u8 byte3)1801 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1802 __u8 byte2, __u8 byte3)
1803 {
1804 struct usb_serial_port *port;
1805 struct edgeport_port *edge_port;
1806 struct tty_struct *tty;
1807 struct device *dev;
1808 __u8 code = edge_serial->rxStatusCode;
1809
1810 /* switch the port pointer to the one being currently talked about */
1811 if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1812 return;
1813 port = edge_serial->serial->port[edge_serial->rxPort];
1814 edge_port = usb_get_serial_port_data(port);
1815 if (edge_port == NULL) {
1816 dev_err(&edge_serial->serial->dev->dev,
1817 "%s - edge_port == NULL for port %d\n",
1818 __func__, edge_serial->rxPort);
1819 return;
1820 }
1821 dev = &port->dev;
1822
1823 if (code == IOSP_EXT_STATUS) {
1824 switch (byte2) {
1825 case IOSP_EXT_STATUS_CHASE_RSP:
1826 /* we want to do EXT status regardless of port
1827 * open/closed */
1828 dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1829 __func__, edge_serial->rxPort, byte3);
1830 /* Currently, the only EXT_STATUS is Chase, so process
1831 * here instead of one more call to one more subroutine
1832 * If/when more EXT_STATUS, there'll be more work to do
1833 * Also, we currently clear flag and close the port
1834 * regardless of content of above's Byte3.
1835 * We could choose to do something else when Byte3 says
1836 * Timeout on Chase from Edgeport, like wait longer in
1837 * block_until_chase_response, but for now we don't.
1838 */
1839 edge_port->chaseResponsePending = false;
1840 wake_up(&edge_port->wait_chase);
1841 return;
1842
1843 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1844 dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1845 __func__, edge_serial->rxPort, byte3);
1846 /* Port->RxCheckRsp = true; */
1847 return;
1848 }
1849 }
1850
1851 if (code == IOSP_STATUS_OPEN_RSP) {
1852 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1853 edge_port->maxTxCredits = edge_port->txCredits;
1854 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1855 __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1856 handle_new_msr(edge_port, byte2);
1857
1858 /* send the current line settings to the port so we are
1859 in sync with any further termios calls */
1860 tty = tty_port_tty_get(&edge_port->port->port);
1861 if (tty) {
1862 change_port_settings(tty,
1863 edge_port, &tty->termios);
1864 tty_kref_put(tty);
1865 }
1866
1867 /* we have completed the open */
1868 edge_port->openPending = false;
1869 edge_port->open = true;
1870 wake_up(&edge_port->wait_open);
1871 return;
1872 }
1873
1874 /* If port is closed, silently discard all rcvd status. We can
1875 * have cases where buffered status is received AFTER the close
1876 * port command is sent to the Edgeport.
1877 */
1878 if (!edge_port->open || edge_port->closePending)
1879 return;
1880
1881 switch (code) {
1882 /* Not currently sent by Edgeport */
1883 case IOSP_STATUS_LSR:
1884 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1885 __func__, edge_serial->rxPort, byte2);
1886 handle_new_lsr(edge_port, false, byte2, 0);
1887 break;
1888
1889 case IOSP_STATUS_LSR_DATA:
1890 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1891 __func__, edge_serial->rxPort, byte2, byte3);
1892 /* byte2 is LSR Register */
1893 /* byte3 is broken data byte */
1894 handle_new_lsr(edge_port, true, byte2, byte3);
1895 break;
1896 /*
1897 * case IOSP_EXT_4_STATUS:
1898 * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1899 * __func__, edge_serial->rxPort, byte2, byte3);
1900 * break;
1901 */
1902 case IOSP_STATUS_MSR:
1903 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1904 __func__, edge_serial->rxPort, byte2);
1905 /*
1906 * Process this new modem status and generate appropriate
1907 * events, etc, based on the new status. This routine
1908 * also saves the MSR in Port->ShadowMsr.
1909 */
1910 handle_new_msr(edge_port, byte2);
1911 break;
1912
1913 default:
1914 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1915 break;
1916 }
1917 }
1918
1919
1920 /*****************************************************************************
1921 * edge_tty_recv
1922 * this function passes data on to the tty flip buffer
1923 *****************************************************************************/
edge_tty_recv(struct usb_serial_port * port,unsigned char * data,int length)1924 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1925 int length)
1926 {
1927 int cnt;
1928
1929 cnt = tty_insert_flip_string(&port->port, data, length);
1930 if (cnt < length) {
1931 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1932 __func__, length - cnt);
1933 }
1934 data += cnt;
1935 length -= cnt;
1936
1937 tty_flip_buffer_push(&port->port);
1938 }
1939
1940
1941 /*****************************************************************************
1942 * handle_new_msr
1943 * this function handles any change to the msr register for a port.
1944 *****************************************************************************/
handle_new_msr(struct edgeport_port * edge_port,__u8 newMsr)1945 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1946 {
1947 struct async_icount *icount;
1948
1949 if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1950 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1951 icount = &edge_port->port->icount;
1952
1953 /* update input line counters */
1954 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1955 icount->cts++;
1956 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1957 icount->dsr++;
1958 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1959 icount->dcd++;
1960 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1961 icount->rng++;
1962 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1963 }
1964
1965 /* Save the new modem status */
1966 edge_port->shadowMSR = newMsr & 0xf0;
1967 }
1968
1969
1970 /*****************************************************************************
1971 * handle_new_lsr
1972 * this function handles any change to the lsr register for a port.
1973 *****************************************************************************/
handle_new_lsr(struct edgeport_port * edge_port,__u8 lsrData,__u8 lsr,__u8 data)1974 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1975 __u8 lsr, __u8 data)
1976 {
1977 __u8 newLsr = (__u8) (lsr & (__u8)
1978 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1979 struct async_icount *icount;
1980
1981 edge_port->shadowLSR = lsr;
1982
1983 if (newLsr & LSR_BREAK) {
1984 /*
1985 * Parity and Framing errors only count if they
1986 * occur exclusive of a break being
1987 * received.
1988 */
1989 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1990 }
1991
1992 /* Place LSR data byte into Rx buffer */
1993 if (lsrData)
1994 edge_tty_recv(edge_port->port, &data, 1);
1995
1996 /* update input line counters */
1997 icount = &edge_port->port->icount;
1998 if (newLsr & LSR_BREAK)
1999 icount->brk++;
2000 if (newLsr & LSR_OVER_ERR)
2001 icount->overrun++;
2002 if (newLsr & LSR_PAR_ERR)
2003 icount->parity++;
2004 if (newLsr & LSR_FRM_ERR)
2005 icount->frame++;
2006 }
2007
2008
2009 /****************************************************************************
2010 * sram_write
2011 * writes a number of bytes to the Edgeport device's sram starting at the
2012 * given address.
2013 * If successful returns the number of bytes written, otherwise it returns
2014 * a negative error number of the problem.
2015 ****************************************************************************/
sram_write(struct usb_serial * serial,__u16 extAddr,__u16 addr,__u16 length,const __u8 * data)2016 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2017 __u16 length, const __u8 *data)
2018 {
2019 int result;
2020 __u16 current_length;
2021 unsigned char *transfer_buffer;
2022
2023 dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2024
2025 transfer_buffer = kmalloc(64, GFP_KERNEL);
2026 if (!transfer_buffer)
2027 return -ENOMEM;
2028
2029 /* need to split these writes up into 64 byte chunks */
2030 result = 0;
2031 while (length > 0) {
2032 if (length > 64)
2033 current_length = 64;
2034 else
2035 current_length = length;
2036
2037 /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2038 memcpy(transfer_buffer, data, current_length);
2039 result = usb_control_msg(serial->dev,
2040 usb_sndctrlpipe(serial->dev, 0),
2041 USB_REQUEST_ION_WRITE_RAM,
2042 0x40, addr, extAddr, transfer_buffer,
2043 current_length, 300);
2044 if (result < 0)
2045 break;
2046 length -= current_length;
2047 addr += current_length;
2048 data += current_length;
2049 }
2050
2051 kfree(transfer_buffer);
2052 return result;
2053 }
2054
2055
2056 /****************************************************************************
2057 * rom_write
2058 * writes a number of bytes to the Edgeport device's ROM starting at the
2059 * given address.
2060 * If successful returns the number of bytes written, otherwise it returns
2061 * a negative error number of the problem.
2062 ****************************************************************************/
rom_write(struct usb_serial * serial,__u16 extAddr,__u16 addr,__u16 length,const __u8 * data)2063 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2064 __u16 length, const __u8 *data)
2065 {
2066 int result;
2067 __u16 current_length;
2068 unsigned char *transfer_buffer;
2069
2070 transfer_buffer = kmalloc(64, GFP_KERNEL);
2071 if (!transfer_buffer)
2072 return -ENOMEM;
2073
2074 /* need to split these writes up into 64 byte chunks */
2075 result = 0;
2076 while (length > 0) {
2077 if (length > 64)
2078 current_length = 64;
2079 else
2080 current_length = length;
2081 memcpy(transfer_buffer, data, current_length);
2082 result = usb_control_msg(serial->dev,
2083 usb_sndctrlpipe(serial->dev, 0),
2084 USB_REQUEST_ION_WRITE_ROM, 0x40,
2085 addr, extAddr,
2086 transfer_buffer, current_length, 300);
2087 if (result < 0)
2088 break;
2089 length -= current_length;
2090 addr += current_length;
2091 data += current_length;
2092 }
2093
2094 kfree(transfer_buffer);
2095 return result;
2096 }
2097
2098
2099 /****************************************************************************
2100 * rom_read
2101 * reads a number of bytes from the Edgeport device starting at the given
2102 * address.
2103 * Returns zero on success or a negative error number.
2104 ****************************************************************************/
rom_read(struct usb_serial * serial,__u16 extAddr,__u16 addr,__u16 length,__u8 * data)2105 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2106 __u16 addr, __u16 length, __u8 *data)
2107 {
2108 int result;
2109 __u16 current_length;
2110 unsigned char *transfer_buffer;
2111
2112 transfer_buffer = kmalloc(64, GFP_KERNEL);
2113 if (!transfer_buffer)
2114 return -ENOMEM;
2115
2116 /* need to split these reads up into 64 byte chunks */
2117 result = 0;
2118 while (length > 0) {
2119 if (length > 64)
2120 current_length = 64;
2121 else
2122 current_length = length;
2123 result = usb_control_msg(serial->dev,
2124 usb_rcvctrlpipe(serial->dev, 0),
2125 USB_REQUEST_ION_READ_ROM,
2126 0xC0, addr, extAddr, transfer_buffer,
2127 current_length, 300);
2128 if (result < current_length) {
2129 if (result >= 0)
2130 result = -EIO;
2131 break;
2132 }
2133 memcpy(data, transfer_buffer, current_length);
2134 length -= current_length;
2135 addr += current_length;
2136 data += current_length;
2137
2138 result = 0;
2139 }
2140
2141 kfree(transfer_buffer);
2142 return result;
2143 }
2144
2145
2146 /****************************************************************************
2147 * send_iosp_ext_cmd
2148 * Is used to send a IOSP message to the Edgeport device
2149 ****************************************************************************/
send_iosp_ext_cmd(struct edgeport_port * edge_port,__u8 command,__u8 param)2150 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2151 __u8 command, __u8 param)
2152 {
2153 unsigned char *buffer;
2154 unsigned char *currentCommand;
2155 int length = 0;
2156 int status = 0;
2157
2158 buffer = kmalloc(10, GFP_ATOMIC);
2159 if (!buffer)
2160 return -ENOMEM;
2161
2162 currentCommand = buffer;
2163
2164 MAKE_CMD_EXT_CMD(¤tCommand, &length, edge_port->port->port_number,
2165 command, param);
2166
2167 status = write_cmd_usb(edge_port, buffer, length);
2168 if (status) {
2169 /* something bad happened, let's free up the memory */
2170 kfree(buffer);
2171 }
2172
2173 return status;
2174 }
2175
2176
2177 /*****************************************************************************
2178 * write_cmd_usb
2179 * this function writes the given buffer out to the bulk write endpoint.
2180 *****************************************************************************/
write_cmd_usb(struct edgeport_port * edge_port,unsigned char * buffer,int length)2181 static int write_cmd_usb(struct edgeport_port *edge_port,
2182 unsigned char *buffer, int length)
2183 {
2184 struct edgeport_serial *edge_serial =
2185 usb_get_serial_data(edge_port->port->serial);
2186 struct device *dev = &edge_port->port->dev;
2187 int status = 0;
2188 struct urb *urb;
2189
2190 usb_serial_debug_data(dev, __func__, length, buffer);
2191
2192 /* Allocate our next urb */
2193 urb = usb_alloc_urb(0, GFP_ATOMIC);
2194 if (!urb)
2195 return -ENOMEM;
2196
2197 atomic_inc(&CmdUrbs);
2198 dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2199 __func__, urb, atomic_read(&CmdUrbs));
2200
2201 usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2202 usb_sndbulkpipe(edge_serial->serial->dev,
2203 edge_serial->bulk_out_endpoint),
2204 buffer, length, edge_bulk_out_cmd_callback, edge_port);
2205
2206 edge_port->commandPending = true;
2207 status = usb_submit_urb(urb, GFP_ATOMIC);
2208
2209 if (status) {
2210 /* something went wrong */
2211 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2212 __func__, status);
2213 usb_free_urb(urb);
2214 atomic_dec(&CmdUrbs);
2215 return status;
2216 }
2217
2218 #if 0
2219 wait_event(&edge_port->wait_command, !edge_port->commandPending);
2220
2221 if (edge_port->commandPending) {
2222 /* command timed out */
2223 dev_dbg(dev, "%s - command timed out\n", __func__);
2224 status = -EINVAL;
2225 }
2226 #endif
2227 return status;
2228 }
2229
2230
2231 /*****************************************************************************
2232 * send_cmd_write_baud_rate
2233 * this function sends the proper command to change the baud rate of the
2234 * specified port.
2235 *****************************************************************************/
send_cmd_write_baud_rate(struct edgeport_port * edge_port,int baudRate)2236 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2237 int baudRate)
2238 {
2239 struct edgeport_serial *edge_serial =
2240 usb_get_serial_data(edge_port->port->serial);
2241 struct device *dev = &edge_port->port->dev;
2242 unsigned char *cmdBuffer;
2243 unsigned char *currCmd;
2244 int cmdLen = 0;
2245 int divisor;
2246 int status;
2247 u32 number = edge_port->port->port_number;
2248
2249 if (edge_serial->is_epic &&
2250 !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2251 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2252 baudRate);
2253 return 0;
2254 }
2255
2256 dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2257
2258 status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2259 if (status) {
2260 dev_err(dev, "%s - bad baud rate\n", __func__);
2261 return status;
2262 }
2263
2264 /* Alloc memory for the string of commands. */
2265 cmdBuffer = kmalloc(0x100, GFP_ATOMIC);
2266 if (!cmdBuffer)
2267 return -ENOMEM;
2268
2269 currCmd = cmdBuffer;
2270
2271 /* Enable access to divisor latch */
2272 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2273
2274 /* Write the divisor itself */
2275 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2276 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2277
2278 /* Restore original value to disable access to divisor latch */
2279 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2280 edge_port->shadowLCR);
2281
2282 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2283 if (status) {
2284 /* something bad happened, let's free up the memory */
2285 kfree(cmdBuffer);
2286 }
2287
2288 return status;
2289 }
2290
2291
2292 /*****************************************************************************
2293 * calc_baud_rate_divisor
2294 * this function calculates the proper baud rate divisor for the specified
2295 * baud rate.
2296 *****************************************************************************/
calc_baud_rate_divisor(struct device * dev,int baudrate,int * divisor)2297 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2298 {
2299 int i;
2300 __u16 custom;
2301
2302 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2303 if (divisor_table[i].BaudRate == baudrate) {
2304 *divisor = divisor_table[i].Divisor;
2305 return 0;
2306 }
2307 }
2308
2309 /* We have tried all of the standard baud rates
2310 * lets try to calculate the divisor for this baud rate
2311 * Make sure the baud rate is reasonable */
2312 if (baudrate > 50 && baudrate < 230400) {
2313 /* get divisor */
2314 custom = (__u16)((230400L + baudrate/2) / baudrate);
2315
2316 *divisor = custom;
2317
2318 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2319 return 0;
2320 }
2321
2322 return -1;
2323 }
2324
2325
2326 /*****************************************************************************
2327 * send_cmd_write_uart_register
2328 * this function builds up a uart register message and sends to the device.
2329 *****************************************************************************/
send_cmd_write_uart_register(struct edgeport_port * edge_port,__u8 regNum,__u8 regValue)2330 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2331 __u8 regNum, __u8 regValue)
2332 {
2333 struct edgeport_serial *edge_serial =
2334 usb_get_serial_data(edge_port->port->serial);
2335 struct device *dev = &edge_port->port->dev;
2336 unsigned char *cmdBuffer;
2337 unsigned char *currCmd;
2338 unsigned long cmdLen = 0;
2339 int status;
2340
2341 dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2342 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2343
2344 if (edge_serial->is_epic &&
2345 !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2346 regNum == MCR) {
2347 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2348 return 0;
2349 }
2350
2351 if (edge_serial->is_epic &&
2352 !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2353 regNum == LCR) {
2354 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2355 return 0;
2356 }
2357
2358 /* Alloc memory for the string of commands. */
2359 cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2360 if (cmdBuffer == NULL)
2361 return -ENOMEM;
2362
2363 currCmd = cmdBuffer;
2364
2365 /* Build a cmd in the buffer to write the given register */
2366 MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2367 regNum, regValue);
2368
2369 status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2370 if (status) {
2371 /* something bad happened, let's free up the memory */
2372 kfree(cmdBuffer);
2373 }
2374
2375 return status;
2376 }
2377
2378
2379 /*****************************************************************************
2380 * change_port_settings
2381 * This routine is called to set the UART on the device to match the
2382 * specified new settings.
2383 *****************************************************************************/
2384
change_port_settings(struct tty_struct * tty,struct edgeport_port * edge_port,struct ktermios * old_termios)2385 static void change_port_settings(struct tty_struct *tty,
2386 struct edgeport_port *edge_port, struct ktermios *old_termios)
2387 {
2388 struct device *dev = &edge_port->port->dev;
2389 struct edgeport_serial *edge_serial =
2390 usb_get_serial_data(edge_port->port->serial);
2391 int baud;
2392 unsigned cflag;
2393 __u8 mask = 0xff;
2394 __u8 lData;
2395 __u8 lParity;
2396 __u8 lStop;
2397 __u8 rxFlow;
2398 __u8 txFlow;
2399 int status;
2400
2401 if (!edge_port->open &&
2402 !edge_port->openPending) {
2403 dev_dbg(dev, "%s - port not opened\n", __func__);
2404 return;
2405 }
2406
2407 cflag = tty->termios.c_cflag;
2408
2409 switch (cflag & CSIZE) {
2410 case CS5:
2411 lData = LCR_BITS_5; mask = 0x1f;
2412 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2413 break;
2414 case CS6:
2415 lData = LCR_BITS_6; mask = 0x3f;
2416 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2417 break;
2418 case CS7:
2419 lData = LCR_BITS_7; mask = 0x7f;
2420 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2421 break;
2422 default:
2423 case CS8:
2424 lData = LCR_BITS_8;
2425 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2426 break;
2427 }
2428
2429 lParity = LCR_PAR_NONE;
2430 if (cflag & PARENB) {
2431 if (cflag & CMSPAR) {
2432 if (cflag & PARODD) {
2433 lParity = LCR_PAR_MARK;
2434 dev_dbg(dev, "%s - parity = mark\n", __func__);
2435 } else {
2436 lParity = LCR_PAR_SPACE;
2437 dev_dbg(dev, "%s - parity = space\n", __func__);
2438 }
2439 } else if (cflag & PARODD) {
2440 lParity = LCR_PAR_ODD;
2441 dev_dbg(dev, "%s - parity = odd\n", __func__);
2442 } else {
2443 lParity = LCR_PAR_EVEN;
2444 dev_dbg(dev, "%s - parity = even\n", __func__);
2445 }
2446 } else {
2447 dev_dbg(dev, "%s - parity = none\n", __func__);
2448 }
2449
2450 if (cflag & CSTOPB) {
2451 lStop = LCR_STOP_2;
2452 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2453 } else {
2454 lStop = LCR_STOP_1;
2455 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2456 }
2457
2458 /* figure out the flow control settings */
2459 rxFlow = txFlow = 0x00;
2460 if (cflag & CRTSCTS) {
2461 rxFlow |= IOSP_RX_FLOW_RTS;
2462 txFlow |= IOSP_TX_FLOW_CTS;
2463 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2464 } else {
2465 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2466 }
2467
2468 /* if we are implementing XON/XOFF, set the start and stop character
2469 in the device */
2470 if (I_IXOFF(tty) || I_IXON(tty)) {
2471 unsigned char stop_char = STOP_CHAR(tty);
2472 unsigned char start_char = START_CHAR(tty);
2473
2474 if (!edge_serial->is_epic ||
2475 edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2476 send_iosp_ext_cmd(edge_port,
2477 IOSP_CMD_SET_XON_CHAR, start_char);
2478 send_iosp_ext_cmd(edge_port,
2479 IOSP_CMD_SET_XOFF_CHAR, stop_char);
2480 }
2481
2482 /* if we are implementing INBOUND XON/XOFF */
2483 if (I_IXOFF(tty)) {
2484 rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2485 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2486 __func__, start_char, stop_char);
2487 } else {
2488 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2489 }
2490
2491 /* if we are implementing OUTBOUND XON/XOFF */
2492 if (I_IXON(tty)) {
2493 txFlow |= IOSP_TX_FLOW_XON_XOFF;
2494 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2495 __func__, start_char, stop_char);
2496 } else {
2497 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2498 }
2499 }
2500
2501 /* Set flow control to the configured value */
2502 if (!edge_serial->is_epic ||
2503 edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2504 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2505 if (!edge_serial->is_epic ||
2506 edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2507 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2508
2509
2510 edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2511 edge_port->shadowLCR |= (lData | lParity | lStop);
2512
2513 edge_port->validDataMask = mask;
2514
2515 /* Send the updated LCR value to the EdgePort */
2516 status = send_cmd_write_uart_register(edge_port, LCR,
2517 edge_port->shadowLCR);
2518 if (status != 0)
2519 return;
2520
2521 /* set up the MCR register and send it to the EdgePort */
2522 edge_port->shadowMCR = MCR_MASTER_IE;
2523 if (cflag & CBAUD)
2524 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2525
2526 status = send_cmd_write_uart_register(edge_port, MCR,
2527 edge_port->shadowMCR);
2528 if (status != 0)
2529 return;
2530
2531 /* Determine divisor based on baud rate */
2532 baud = tty_get_baud_rate(tty);
2533 if (!baud) {
2534 /* pick a default, any default... */
2535 baud = 9600;
2536 }
2537
2538 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2539 status = send_cmd_write_baud_rate(edge_port, baud);
2540 if (status == -1) {
2541 /* Speed change was not possible - put back the old speed */
2542 baud = tty_termios_baud_rate(old_termios);
2543 tty_encode_baud_rate(tty, baud, baud);
2544 }
2545 }
2546
2547
2548 /****************************************************************************
2549 * unicode_to_ascii
2550 * Turns a string from Unicode into ASCII.
2551 * Doesn't do a good job with any characters that are outside the normal
2552 * ASCII range, but it's only for debugging...
2553 * NOTE: expects the unicode in LE format
2554 ****************************************************************************/
unicode_to_ascii(char * string,int buflen,__le16 * unicode,int unicode_size)2555 static void unicode_to_ascii(char *string, int buflen,
2556 __le16 *unicode, int unicode_size)
2557 {
2558 int i;
2559
2560 if (buflen <= 0) /* never happens, but... */
2561 return;
2562 --buflen; /* space for nul */
2563
2564 for (i = 0; i < unicode_size; i++) {
2565 if (i >= buflen)
2566 break;
2567 string[i] = (char)(le16_to_cpu(unicode[i]));
2568 }
2569 string[i] = 0x00;
2570 }
2571
2572
2573 /****************************************************************************
2574 * get_manufacturing_desc
2575 * reads in the manufacturing descriptor and stores it into the serial
2576 * structure.
2577 ****************************************************************************/
get_manufacturing_desc(struct edgeport_serial * edge_serial)2578 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2579 {
2580 struct device *dev = &edge_serial->serial->dev->dev;
2581 int response;
2582
2583 dev_dbg(dev, "getting manufacturer descriptor\n");
2584
2585 response = rom_read(edge_serial->serial,
2586 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2587 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2588 EDGE_MANUF_DESC_LEN,
2589 (__u8 *)(&edge_serial->manuf_descriptor));
2590
2591 if (response < 0) {
2592 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2593 response);
2594 } else {
2595 char string[30];
2596 dev_dbg(dev, "**Manufacturer Descriptor\n");
2597 dev_dbg(dev, " RomSize: %dK\n",
2598 edge_serial->manuf_descriptor.RomSize);
2599 dev_dbg(dev, " RamSize: %dK\n",
2600 edge_serial->manuf_descriptor.RamSize);
2601 dev_dbg(dev, " CpuRev: %d\n",
2602 edge_serial->manuf_descriptor.CpuRev);
2603 dev_dbg(dev, " BoardRev: %d\n",
2604 edge_serial->manuf_descriptor.BoardRev);
2605 dev_dbg(dev, " NumPorts: %d\n",
2606 edge_serial->manuf_descriptor.NumPorts);
2607 dev_dbg(dev, " DescDate: %d/%d/%d\n",
2608 edge_serial->manuf_descriptor.DescDate[0],
2609 edge_serial->manuf_descriptor.DescDate[1],
2610 edge_serial->manuf_descriptor.DescDate[2]+1900);
2611 unicode_to_ascii(string, sizeof(string),
2612 edge_serial->manuf_descriptor.SerialNumber,
2613 edge_serial->manuf_descriptor.SerNumLength/2);
2614 dev_dbg(dev, " SerialNumber: %s\n", string);
2615 unicode_to_ascii(string, sizeof(string),
2616 edge_serial->manuf_descriptor.AssemblyNumber,
2617 edge_serial->manuf_descriptor.AssemblyNumLength/2);
2618 dev_dbg(dev, " AssemblyNumber: %s\n", string);
2619 unicode_to_ascii(string, sizeof(string),
2620 edge_serial->manuf_descriptor.OemAssyNumber,
2621 edge_serial->manuf_descriptor.OemAssyNumLength/2);
2622 dev_dbg(dev, " OemAssyNumber: %s\n", string);
2623 dev_dbg(dev, " UartType: %d\n",
2624 edge_serial->manuf_descriptor.UartType);
2625 dev_dbg(dev, " IonPid: %d\n",
2626 edge_serial->manuf_descriptor.IonPid);
2627 dev_dbg(dev, " IonConfig: %d\n",
2628 edge_serial->manuf_descriptor.IonConfig);
2629 }
2630 }
2631
2632
2633 /****************************************************************************
2634 * get_boot_desc
2635 * reads in the bootloader descriptor and stores it into the serial
2636 * structure.
2637 ****************************************************************************/
get_boot_desc(struct edgeport_serial * edge_serial)2638 static void get_boot_desc(struct edgeport_serial *edge_serial)
2639 {
2640 struct device *dev = &edge_serial->serial->dev->dev;
2641 int response;
2642
2643 dev_dbg(dev, "getting boot descriptor\n");
2644
2645 response = rom_read(edge_serial->serial,
2646 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2647 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2648 EDGE_BOOT_DESC_LEN,
2649 (__u8 *)(&edge_serial->boot_descriptor));
2650
2651 if (response < 0) {
2652 dev_err(dev, "error in getting boot descriptor: %d\n",
2653 response);
2654 } else {
2655 dev_dbg(dev, "**Boot Descriptor:\n");
2656 dev_dbg(dev, " BootCodeLength: %d\n",
2657 le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2658 dev_dbg(dev, " MajorVersion: %d\n",
2659 edge_serial->boot_descriptor.MajorVersion);
2660 dev_dbg(dev, " MinorVersion: %d\n",
2661 edge_serial->boot_descriptor.MinorVersion);
2662 dev_dbg(dev, " BuildNumber: %d\n",
2663 le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2664 dev_dbg(dev, " Capabilities: 0x%x\n",
2665 le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2666 dev_dbg(dev, " UConfig0: %d\n",
2667 edge_serial->boot_descriptor.UConfig0);
2668 dev_dbg(dev, " UConfig1: %d\n",
2669 edge_serial->boot_descriptor.UConfig1);
2670 }
2671 }
2672
2673
2674 /****************************************************************************
2675 * load_application_firmware
2676 * This is called to load the application firmware to the device
2677 ****************************************************************************/
load_application_firmware(struct edgeport_serial * edge_serial)2678 static void load_application_firmware(struct edgeport_serial *edge_serial)
2679 {
2680 struct device *dev = &edge_serial->serial->dev->dev;
2681 const struct ihex_binrec *rec;
2682 const struct firmware *fw;
2683 const char *fw_name;
2684 const char *fw_info;
2685 int response;
2686 __u32 Operaddr;
2687 __u16 build;
2688
2689 switch (edge_serial->product_info.iDownloadFile) {
2690 case EDGE_DOWNLOAD_FILE_I930:
2691 fw_info = "downloading firmware version (930)";
2692 fw_name = "edgeport/down.fw";
2693 break;
2694
2695 case EDGE_DOWNLOAD_FILE_80251:
2696 fw_info = "downloading firmware version (80251)";
2697 fw_name = "edgeport/down2.fw";
2698 break;
2699
2700 case EDGE_DOWNLOAD_FILE_NONE:
2701 dev_dbg(dev, "No download file specified, skipping download\n");
2702 return;
2703
2704 default:
2705 return;
2706 }
2707
2708 response = request_ihex_firmware(&fw, fw_name,
2709 &edge_serial->serial->dev->dev);
2710 if (response) {
2711 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2712 fw_name, response);
2713 return;
2714 }
2715
2716 rec = (const struct ihex_binrec *)fw->data;
2717 build = (rec->data[2] << 8) | rec->data[3];
2718
2719 dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2720
2721 edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2722 edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2723 edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2724
2725 for (rec = ihex_next_binrec(rec); rec;
2726 rec = ihex_next_binrec(rec)) {
2727 Operaddr = be32_to_cpu(rec->addr);
2728 response = sram_write(edge_serial->serial,
2729 Operaddr >> 16,
2730 Operaddr & 0xFFFF,
2731 be16_to_cpu(rec->len),
2732 &rec->data[0]);
2733 if (response < 0) {
2734 dev_err(&edge_serial->serial->dev->dev,
2735 "sram_write failed (%x, %x, %d)\n",
2736 Operaddr >> 16, Operaddr & 0xFFFF,
2737 be16_to_cpu(rec->len));
2738 break;
2739 }
2740 }
2741
2742 dev_dbg(dev, "sending exec_dl_code\n");
2743 response = usb_control_msg (edge_serial->serial->dev,
2744 usb_sndctrlpipe(edge_serial->serial->dev, 0),
2745 USB_REQUEST_ION_EXEC_DL_CODE,
2746 0x40, 0x4000, 0x0001, NULL, 0, 3000);
2747
2748 release_firmware(fw);
2749 }
2750
2751
2752 /****************************************************************************
2753 * edge_startup
2754 ****************************************************************************/
edge_startup(struct usb_serial * serial)2755 static int edge_startup(struct usb_serial *serial)
2756 {
2757 struct edgeport_serial *edge_serial;
2758 struct usb_device *dev;
2759 struct device *ddev = &serial->dev->dev;
2760 int i;
2761 int response;
2762 bool interrupt_in_found;
2763 bool bulk_in_found;
2764 bool bulk_out_found;
2765 static const __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
2766 EDGE_COMPATIBILITY_MASK1,
2767 EDGE_COMPATIBILITY_MASK2 };
2768
2769 dev = serial->dev;
2770
2771 /* create our private serial structure */
2772 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2773 if (!edge_serial)
2774 return -ENOMEM;
2775
2776 spin_lock_init(&edge_serial->es_lock);
2777 edge_serial->serial = serial;
2778 usb_set_serial_data(serial, edge_serial);
2779
2780 /* get the name for the device from the device */
2781 i = usb_string(dev, dev->descriptor.iManufacturer,
2782 &edge_serial->name[0], MAX_NAME_LEN+1);
2783 if (i < 0)
2784 i = 0;
2785 edge_serial->name[i++] = ' ';
2786 usb_string(dev, dev->descriptor.iProduct,
2787 &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2788
2789 dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2790
2791 /* Read the epic descriptor */
2792 if (get_epic_descriptor(edge_serial) < 0) {
2793 /* memcpy descriptor to Supports structures */
2794 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2795 sizeof(struct edge_compatibility_bits));
2796
2797 /* get the manufacturing descriptor for this device */
2798 get_manufacturing_desc(edge_serial);
2799
2800 /* get the boot descriptor */
2801 get_boot_desc(edge_serial);
2802
2803 get_product_info(edge_serial);
2804 }
2805
2806 /* set the number of ports from the manufacturing description */
2807 /* serial->num_ports = serial->product_info.NumPorts; */
2808 if ((!edge_serial->is_epic) &&
2809 (edge_serial->product_info.NumPorts != serial->num_ports)) {
2810 dev_warn(ddev,
2811 "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2812 edge_serial->product_info.NumPorts,
2813 serial->num_ports);
2814 }
2815
2816 dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2817
2818 /* If not an EPiC device */
2819 if (!edge_serial->is_epic) {
2820 /* now load the application firmware into this device */
2821 load_application_firmware(edge_serial);
2822
2823 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2824
2825 /* Check current Edgeport EEPROM and update if necessary */
2826 update_edgeport_E2PROM(edge_serial);
2827
2828 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2829
2830 /* set the configuration to use #1 */
2831 /* dev_dbg(ddev, "set_configuration 1\n"); */
2832 /* usb_set_configuration (dev, 1); */
2833 }
2834 dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n",
2835 edge_serial->product_info.FirmwareMajorVersion,
2836 edge_serial->product_info.FirmwareMinorVersion,
2837 le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2838
2839 /* we set up the pointers to the endpoints in the edge_open function,
2840 * as the structures aren't created yet. */
2841
2842 response = 0;
2843
2844 if (edge_serial->is_epic) {
2845 struct usb_host_interface *alt;
2846
2847 alt = serial->interface->cur_altsetting;
2848
2849 /* EPIC thing, set up our interrupt polling now and our read
2850 * urb, so that the device knows it really is connected. */
2851 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2852 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2853 struct usb_endpoint_descriptor *endpoint;
2854 int buffer_size;
2855
2856 endpoint = &alt->endpoint[i].desc;
2857 buffer_size = usb_endpoint_maxp(endpoint);
2858 if (!interrupt_in_found &&
2859 (usb_endpoint_is_int_in(endpoint))) {
2860 /* we found a interrupt in endpoint */
2861 dev_dbg(ddev, "found interrupt in\n");
2862
2863 /* not set up yet, so do it now */
2864 edge_serial->interrupt_read_urb =
2865 usb_alloc_urb(0, GFP_KERNEL);
2866 if (!edge_serial->interrupt_read_urb) {
2867 response = -ENOMEM;
2868 break;
2869 }
2870
2871 edge_serial->interrupt_in_buffer =
2872 kmalloc(buffer_size, GFP_KERNEL);
2873 if (!edge_serial->interrupt_in_buffer) {
2874 response = -ENOMEM;
2875 break;
2876 }
2877 edge_serial->interrupt_in_endpoint =
2878 endpoint->bEndpointAddress;
2879
2880 /* set up our interrupt urb */
2881 usb_fill_int_urb(
2882 edge_serial->interrupt_read_urb,
2883 dev,
2884 usb_rcvintpipe(dev,
2885 endpoint->bEndpointAddress),
2886 edge_serial->interrupt_in_buffer,
2887 buffer_size,
2888 edge_interrupt_callback,
2889 edge_serial,
2890 endpoint->bInterval);
2891
2892 interrupt_in_found = true;
2893 }
2894
2895 if (!bulk_in_found &&
2896 (usb_endpoint_is_bulk_in(endpoint))) {
2897 /* we found a bulk in endpoint */
2898 dev_dbg(ddev, "found bulk in\n");
2899
2900 /* not set up yet, so do it now */
2901 edge_serial->read_urb =
2902 usb_alloc_urb(0, GFP_KERNEL);
2903 if (!edge_serial->read_urb) {
2904 response = -ENOMEM;
2905 break;
2906 }
2907
2908 edge_serial->bulk_in_buffer =
2909 kmalloc(buffer_size, GFP_KERNEL);
2910 if (!edge_serial->bulk_in_buffer) {
2911 response = -ENOMEM;
2912 break;
2913 }
2914 edge_serial->bulk_in_endpoint =
2915 endpoint->bEndpointAddress;
2916
2917 /* set up our bulk in urb */
2918 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2919 usb_rcvbulkpipe(dev,
2920 endpoint->bEndpointAddress),
2921 edge_serial->bulk_in_buffer,
2922 usb_endpoint_maxp(endpoint),
2923 edge_bulk_in_callback,
2924 edge_serial);
2925 bulk_in_found = true;
2926 }
2927
2928 if (!bulk_out_found &&
2929 (usb_endpoint_is_bulk_out(endpoint))) {
2930 /* we found a bulk out endpoint */
2931 dev_dbg(ddev, "found bulk out\n");
2932 edge_serial->bulk_out_endpoint =
2933 endpoint->bEndpointAddress;
2934 bulk_out_found = true;
2935 }
2936 }
2937
2938 if (response || !interrupt_in_found || !bulk_in_found ||
2939 !bulk_out_found) {
2940 if (!response) {
2941 dev_err(ddev, "expected endpoints not found\n");
2942 response = -ENODEV;
2943 }
2944
2945 goto error;
2946 }
2947
2948 /* start interrupt read for this edgeport this interrupt will
2949 * continue as long as the edgeport is connected */
2950 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2951 GFP_KERNEL);
2952 if (response) {
2953 dev_err(ddev, "%s - Error %d submitting control urb\n",
2954 __func__, response);
2955
2956 goto error;
2957 }
2958 }
2959 return response;
2960
2961 error:
2962 usb_free_urb(edge_serial->interrupt_read_urb);
2963 kfree(edge_serial->interrupt_in_buffer);
2964
2965 usb_free_urb(edge_serial->read_urb);
2966 kfree(edge_serial->bulk_in_buffer);
2967
2968 kfree(edge_serial);
2969
2970 return response;
2971 }
2972
2973
2974 /****************************************************************************
2975 * edge_disconnect
2976 * This function is called whenever the device is removed from the usb bus.
2977 ****************************************************************************/
edge_disconnect(struct usb_serial * serial)2978 static void edge_disconnect(struct usb_serial *serial)
2979 {
2980 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2981
2982 if (edge_serial->is_epic) {
2983 usb_kill_urb(edge_serial->interrupt_read_urb);
2984 usb_kill_urb(edge_serial->read_urb);
2985 }
2986 }
2987
2988
2989 /****************************************************************************
2990 * edge_release
2991 * This function is called when the device structure is deallocated.
2992 ****************************************************************************/
edge_release(struct usb_serial * serial)2993 static void edge_release(struct usb_serial *serial)
2994 {
2995 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2996
2997 if (edge_serial->is_epic) {
2998 usb_kill_urb(edge_serial->interrupt_read_urb);
2999 usb_free_urb(edge_serial->interrupt_read_urb);
3000 kfree(edge_serial->interrupt_in_buffer);
3001
3002 usb_kill_urb(edge_serial->read_urb);
3003 usb_free_urb(edge_serial->read_urb);
3004 kfree(edge_serial->bulk_in_buffer);
3005 }
3006
3007 kfree(edge_serial);
3008 }
3009
edge_port_probe(struct usb_serial_port * port)3010 static int edge_port_probe(struct usb_serial_port *port)
3011 {
3012 struct edgeport_port *edge_port;
3013
3014 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3015 if (!edge_port)
3016 return -ENOMEM;
3017
3018 spin_lock_init(&edge_port->ep_lock);
3019 edge_port->port = port;
3020
3021 usb_set_serial_port_data(port, edge_port);
3022
3023 return 0;
3024 }
3025
edge_port_remove(struct usb_serial_port * port)3026 static void edge_port_remove(struct usb_serial_port *port)
3027 {
3028 struct edgeport_port *edge_port;
3029
3030 edge_port = usb_get_serial_port_data(port);
3031 kfree(edge_port);
3032 }
3033
3034 static struct usb_serial_driver edgeport_2port_device = {
3035 .driver = {
3036 .owner = THIS_MODULE,
3037 .name = "edgeport_2",
3038 },
3039 .description = "Edgeport 2 port adapter",
3040 .id_table = edgeport_2port_id_table,
3041 .num_ports = 2,
3042 .num_bulk_in = 1,
3043 .num_bulk_out = 1,
3044 .num_interrupt_in = 1,
3045 .open = edge_open,
3046 .close = edge_close,
3047 .throttle = edge_throttle,
3048 .unthrottle = edge_unthrottle,
3049 .attach = edge_startup,
3050 .disconnect = edge_disconnect,
3051 .release = edge_release,
3052 .port_probe = edge_port_probe,
3053 .port_remove = edge_port_remove,
3054 .ioctl = edge_ioctl,
3055 .set_termios = edge_set_termios,
3056 .tiocmget = edge_tiocmget,
3057 .tiocmset = edge_tiocmset,
3058 .tiocmiwait = usb_serial_generic_tiocmiwait,
3059 .get_icount = usb_serial_generic_get_icount,
3060 .write = edge_write,
3061 .write_room = edge_write_room,
3062 .chars_in_buffer = edge_chars_in_buffer,
3063 .break_ctl = edge_break,
3064 .read_int_callback = edge_interrupt_callback,
3065 .read_bulk_callback = edge_bulk_in_callback,
3066 .write_bulk_callback = edge_bulk_out_data_callback,
3067 };
3068
3069 static struct usb_serial_driver edgeport_4port_device = {
3070 .driver = {
3071 .owner = THIS_MODULE,
3072 .name = "edgeport_4",
3073 },
3074 .description = "Edgeport 4 port adapter",
3075 .id_table = edgeport_4port_id_table,
3076 .num_ports = 4,
3077 .num_bulk_in = 1,
3078 .num_bulk_out = 1,
3079 .num_interrupt_in = 1,
3080 .open = edge_open,
3081 .close = edge_close,
3082 .throttle = edge_throttle,
3083 .unthrottle = edge_unthrottle,
3084 .attach = edge_startup,
3085 .disconnect = edge_disconnect,
3086 .release = edge_release,
3087 .port_probe = edge_port_probe,
3088 .port_remove = edge_port_remove,
3089 .ioctl = edge_ioctl,
3090 .set_termios = edge_set_termios,
3091 .tiocmget = edge_tiocmget,
3092 .tiocmset = edge_tiocmset,
3093 .tiocmiwait = usb_serial_generic_tiocmiwait,
3094 .get_icount = usb_serial_generic_get_icount,
3095 .write = edge_write,
3096 .write_room = edge_write_room,
3097 .chars_in_buffer = edge_chars_in_buffer,
3098 .break_ctl = edge_break,
3099 .read_int_callback = edge_interrupt_callback,
3100 .read_bulk_callback = edge_bulk_in_callback,
3101 .write_bulk_callback = edge_bulk_out_data_callback,
3102 };
3103
3104 static struct usb_serial_driver edgeport_8port_device = {
3105 .driver = {
3106 .owner = THIS_MODULE,
3107 .name = "edgeport_8",
3108 },
3109 .description = "Edgeport 8 port adapter",
3110 .id_table = edgeport_8port_id_table,
3111 .num_ports = 8,
3112 .num_bulk_in = 1,
3113 .num_bulk_out = 1,
3114 .num_interrupt_in = 1,
3115 .open = edge_open,
3116 .close = edge_close,
3117 .throttle = edge_throttle,
3118 .unthrottle = edge_unthrottle,
3119 .attach = edge_startup,
3120 .disconnect = edge_disconnect,
3121 .release = edge_release,
3122 .port_probe = edge_port_probe,
3123 .port_remove = edge_port_remove,
3124 .ioctl = edge_ioctl,
3125 .set_termios = edge_set_termios,
3126 .tiocmget = edge_tiocmget,
3127 .tiocmset = edge_tiocmset,
3128 .tiocmiwait = usb_serial_generic_tiocmiwait,
3129 .get_icount = usb_serial_generic_get_icount,
3130 .write = edge_write,
3131 .write_room = edge_write_room,
3132 .chars_in_buffer = edge_chars_in_buffer,
3133 .break_ctl = edge_break,
3134 .read_int_callback = edge_interrupt_callback,
3135 .read_bulk_callback = edge_bulk_in_callback,
3136 .write_bulk_callback = edge_bulk_out_data_callback,
3137 };
3138
3139 static struct usb_serial_driver epic_device = {
3140 .driver = {
3141 .owner = THIS_MODULE,
3142 .name = "epic",
3143 },
3144 .description = "EPiC device",
3145 .id_table = Epic_port_id_table,
3146 .num_ports = 1,
3147 .num_bulk_in = 1,
3148 .num_bulk_out = 1,
3149 .num_interrupt_in = 1,
3150 .open = edge_open,
3151 .close = edge_close,
3152 .throttle = edge_throttle,
3153 .unthrottle = edge_unthrottle,
3154 .attach = edge_startup,
3155 .disconnect = edge_disconnect,
3156 .release = edge_release,
3157 .port_probe = edge_port_probe,
3158 .port_remove = edge_port_remove,
3159 .ioctl = edge_ioctl,
3160 .set_termios = edge_set_termios,
3161 .tiocmget = edge_tiocmget,
3162 .tiocmset = edge_tiocmset,
3163 .tiocmiwait = usb_serial_generic_tiocmiwait,
3164 .get_icount = usb_serial_generic_get_icount,
3165 .write = edge_write,
3166 .write_room = edge_write_room,
3167 .chars_in_buffer = edge_chars_in_buffer,
3168 .break_ctl = edge_break,
3169 .read_int_callback = edge_interrupt_callback,
3170 .read_bulk_callback = edge_bulk_in_callback,
3171 .write_bulk_callback = edge_bulk_out_data_callback,
3172 };
3173
3174 static struct usb_serial_driver * const serial_drivers[] = {
3175 &edgeport_2port_device, &edgeport_4port_device,
3176 &edgeport_8port_device, &epic_device, NULL
3177 };
3178
3179 module_usb_serial_driver(serial_drivers, id_table_combined);
3180
3181 MODULE_AUTHOR(DRIVER_AUTHOR);
3182 MODULE_DESCRIPTION(DRIVER_DESC);
3183 MODULE_LICENSE("GPL");
3184 MODULE_FIRMWARE("edgeport/boot.fw");
3185 MODULE_FIRMWARE("edgeport/boot2.fw");
3186 MODULE_FIRMWARE("edgeport/down.fw");
3187 MODULE_FIRMWARE("edgeport/down2.fw");
3188