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