2 * Edgeport USB Serial Converter driver
4 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * Supports the following devices:
26 * For questions or problems with this driver, contact Inside Out
27 * Networks technical support, or Peter Berger <pberger@brimson.com>,
28 * or Al Borchers <alborchers@steinerpoint.com>.
32 #include <linux/kernel.h>
33 #include <linux/jiffies.h>
34 #include <linux/errno.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/tty.h>
38 #include <linux/tty_driver.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/spinlock.h>
42 #include <linux/serial.h>
43 #include <linux/ioctl.h>
44 #include <linux/wait.h>
45 #include <linux/firmware.h>
46 #include <linux/ihex.h>
47 #include <linux/uaccess.h>
48 #include <linux/usb.h>
49 #include <linux/usb/serial.h>
50 #include "io_edgeport.h"
51 #include "io_ionsp.h" /* info for the iosp messages */
52 #include "io_16654.h" /* 16654 UART defines */
57 #define DRIVER_VERSION "v2.7"
58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
59 #define DRIVER_DESC "Edgeport USB Serial Driver"
61 #define MAX_NAME_LEN 64
63 #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */
64 #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */
65 #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */
67 /* receive port state */
69 EXPECT_HDR1
= 0, /* Expect header byte 1 */
70 EXPECT_HDR2
= 1, /* Expect header byte 2 */
71 EXPECT_DATA
= 2, /* Expect 'RxBytesRemaining' data */
72 EXPECT_HDR3
= 3, /* Expect header byte 3 (for status hdrs only) */
77 * This Transmit queue is an extension of the edgeport Rx buffer.
78 * The maximum amount of data buffered in both the edgeport
79 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
82 unsigned int head
; /* index to head pointer (write) */
83 unsigned int tail
; /* index to tail pointer (read) */
84 unsigned int count
; /* Bytes in queue */
85 unsigned int size
; /* Max size of queue (equal to Max number of TxCredits) */
86 unsigned char *fifo
; /* allocated Buffer */
89 /* This structure holds all of the local port information */
90 struct edgeport_port
{
91 __u16 txCredits
; /* our current credits for this port */
92 __u16 maxTxCredits
; /* the max size of the port */
94 struct TxFifo txfifo
; /* transmit fifo -- size will be maxTxCredits */
95 struct urb
*write_urb
; /* write URB for this port */
96 bool write_in_progress
; /* 'true' while a write URB is outstanding */
99 __u8 shadowLCR
; /* last LCR value received */
100 __u8 shadowMCR
; /* last MCR value received */
101 __u8 shadowMSR
; /* last MSR value received */
102 __u8 shadowLSR
; /* last LSR value received */
103 __u8 shadowXonChar
; /* last value set as XON char in Edgeport */
104 __u8 shadowXoffChar
; /* last value set as XOFF char in Edgeport */
112 bool chaseResponsePending
;
114 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
115 wait_queue_head_t wait_open
; /* for handling sleeping while waiting for open to finish */
116 wait_queue_head_t wait_command
; /* for handling sleeping while waiting for command to finish */
117 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
119 struct async_icount icount
;
120 struct usb_serial_port
*port
; /* loop back to the owner of this object */
124 /* This structure holds all of the individual device information */
125 struct edgeport_serial
{
126 char name
[MAX_NAME_LEN
+2]; /* string name of this device */
128 struct edge_manuf_descriptor manuf_descriptor
; /* the manufacturer descriptor */
129 struct edge_boot_descriptor boot_descriptor
; /* the boot firmware descriptor */
130 struct edgeport_product_info product_info
; /* Product Info */
131 struct edge_compatibility_descriptor epic_descriptor
; /* Edgeport compatible descriptor */
132 int is_epic
; /* flag if EPiC device or not */
134 __u8 interrupt_in_endpoint
; /* the interrupt endpoint handle */
135 unsigned char *interrupt_in_buffer
; /* the buffer we use for the interrupt endpoint */
136 struct urb
*interrupt_read_urb
; /* our interrupt urb */
138 __u8 bulk_in_endpoint
; /* the bulk in endpoint handle */
139 unsigned char *bulk_in_buffer
; /* the buffer we use for the bulk in endpoint */
140 struct urb
*read_urb
; /* our bulk read urb */
141 bool read_in_progress
;
144 __u8 bulk_out_endpoint
; /* the bulk out endpoint handle */
146 __s16 rxBytesAvail
; /* the number of bytes that we need to read from this device */
148 enum RXSTATE rxState
; /* the current state of the bulk receive processor */
149 __u8 rxHeader1
; /* receive header byte 1 */
150 __u8 rxHeader2
; /* receive header byte 2 */
151 __u8 rxHeader3
; /* receive header byte 3 */
152 __u8 rxPort
; /* the port that we are currently receiving data for */
153 __u8 rxStatusCode
; /* the receive status code */
154 __u8 rxStatusParam
; /* the receive status paramater */
155 __s16 rxBytesRemaining
; /* the number of port bytes left to read */
156 struct usb_serial
*serial
; /* loop back to the owner of this object */
159 /* baud rate information */
160 struct divisor_table_entry
{
166 * Define table of divisors for Rev A EdgePort/4 hardware
167 * These assume a 3.6864MHz crystal, the standard /16, and
171 static const struct divisor_table_entry divisor_table
[] = {
174 { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */
175 { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */
193 /* local variables */
196 static int low_latency
= 1; /* tty low latency flag, on by default */
198 static atomic_t CmdUrbs
; /* Number of outstanding Command Write Urbs */
201 /* local function prototypes */
203 /* function prototypes for all URB callbacks */
204 static void edge_interrupt_callback(struct urb
*urb
);
205 static void edge_bulk_in_callback(struct urb
*urb
);
206 static void edge_bulk_out_data_callback(struct urb
*urb
);
207 static void edge_bulk_out_cmd_callback(struct urb
*urb
);
209 /* function prototypes for the usbserial callbacks */
210 static int edge_open(struct tty_struct
*tty
, struct usb_serial_port
*port
,
212 static void edge_close(struct tty_struct
*tty
, struct usb_serial_port
*port
,
214 static int edge_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
215 const unsigned char *buf
, int count
);
216 static int edge_write_room(struct tty_struct
*tty
);
217 static int edge_chars_in_buffer(struct tty_struct
*tty
);
218 static void edge_throttle(struct tty_struct
*tty
);
219 static void edge_unthrottle(struct tty_struct
*tty
);
220 static void edge_set_termios(struct tty_struct
*tty
,
221 struct usb_serial_port
*port
,
222 struct ktermios
*old_termios
);
223 static int edge_ioctl(struct tty_struct
*tty
, struct file
*file
,
224 unsigned int cmd
, unsigned long arg
);
225 static void edge_break(struct tty_struct
*tty
, int break_state
);
226 static int edge_tiocmget(struct tty_struct
*tty
, struct file
*file
);
227 static int edge_tiocmset(struct tty_struct
*tty
, struct file
*file
,
228 unsigned int set
, unsigned int clear
);
229 static int edge_startup(struct usb_serial
*serial
);
230 static void edge_shutdown(struct usb_serial
*serial
);
232 #include "io_tables.h" /* all of the devices that this driver supports */
234 /* function prototypes for all of our local functions */
236 static void process_rcvd_data(struct edgeport_serial
*edge_serial
,
237 unsigned char *buffer
, __u16 bufferLength
);
238 static void process_rcvd_status(struct edgeport_serial
*edge_serial
,
239 __u8 byte2
, __u8 byte3
);
240 static void edge_tty_recv(struct device
*dev
, struct tty_struct
*tty
,
241 unsigned char *data
, int length
);
242 static void handle_new_msr(struct edgeport_port
*edge_port
, __u8 newMsr
);
243 static void handle_new_lsr(struct edgeport_port
*edge_port
, __u8 lsrData
,
244 __u8 lsr
, __u8 data
);
245 static int send_iosp_ext_cmd(struct edgeport_port
*edge_port
, __u8 command
,
247 static int calc_baud_rate_divisor(int baud_rate
, int *divisor
);
248 static int send_cmd_write_baud_rate(struct edgeport_port
*edge_port
,
250 static void change_port_settings(struct tty_struct
*tty
,
251 struct edgeport_port
*edge_port
,
252 struct ktermios
*old_termios
);
253 static int send_cmd_write_uart_register(struct edgeport_port
*edge_port
,
254 __u8 regNum
, __u8 regValue
);
255 static int write_cmd_usb(struct edgeport_port
*edge_port
,
256 unsigned char *buffer
, int writeLength
);
257 static void send_more_port_data(struct edgeport_serial
*edge_serial
,
258 struct edgeport_port
*edge_port
);
260 static int sram_write(struct usb_serial
*serial
, __u16 extAddr
, __u16 addr
,
261 __u16 length
, const __u8
*data
);
262 static int rom_read(struct usb_serial
*serial
, __u16 extAddr
, __u16 addr
,
263 __u16 length
, __u8
*data
);
264 static int rom_write(struct usb_serial
*serial
, __u16 extAddr
, __u16 addr
,
265 __u16 length
, const __u8
*data
);
266 static void get_manufacturing_desc(struct edgeport_serial
*edge_serial
);
267 static void get_boot_desc(struct edgeport_serial
*edge_serial
);
268 static void load_application_firmware(struct edgeport_serial
*edge_serial
);
270 static void unicode_to_ascii(char *string
, int buflen
,
271 __le16
*unicode
, int unicode_size
);
274 /* ************************************************************************ */
275 /* ************************************************************************ */
276 /* ************************************************************************ */
277 /* ************************************************************************ */
279 /************************************************************************
281 * update_edgeport_E2PROM() Compare current versions of *
282 * Boot ROM and Manufacture *
283 * Descriptors with versions *
284 * embedded in this driver *
286 ************************************************************************/
287 static void update_edgeport_E2PROM(struct edgeport_serial
*edge_serial
)
291 __u8 BootMajorVersion
;
292 __u8 BootMinorVersion
;
293 __u16 BootBuildNumber
;
295 const struct ihex_binrec
*rec
;
296 const struct firmware
*fw
;
300 switch (edge_serial
->product_info
.iDownloadFile
) {
301 case EDGE_DOWNLOAD_FILE_I930
:
302 fw_name
= "edgeport/boot.fw";
304 case EDGE_DOWNLOAD_FILE_80251
:
305 fw_name
= "edgeport/boot2.fw";
311 response
= request_ihex_firmware(&fw
, fw_name
,
312 &edge_serial
->serial
->dev
->dev
);
314 printk(KERN_ERR
"Failed to load image \"%s\" err %d\n",
319 rec
= (const struct ihex_binrec
*)fw
->data
;
320 BootMajorVersion
= rec
->data
[0];
321 BootMinorVersion
= rec
->data
[1];
322 BootBuildNumber
= (rec
->data
[2] << 8) | rec
->data
[3];
324 /* Check Boot Image Version */
325 BootCurVer
= (edge_serial
->boot_descriptor
.MajorVersion
<< 24) +
326 (edge_serial
->boot_descriptor
.MinorVersion
<< 16) +
327 le16_to_cpu(edge_serial
->boot_descriptor
.BuildNumber
);
329 BootNewVer
= (BootMajorVersion
<< 24) +
330 (BootMinorVersion
<< 16) +
333 dbg("Current Boot Image version %d.%d.%d",
334 edge_serial
->boot_descriptor
.MajorVersion
,
335 edge_serial
->boot_descriptor
.MinorVersion
,
336 le16_to_cpu(edge_serial
->boot_descriptor
.BuildNumber
));
339 if (BootNewVer
> BootCurVer
) {
340 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
341 edge_serial
->boot_descriptor
.MajorVersion
,
342 edge_serial
->boot_descriptor
.MinorVersion
,
343 le16_to_cpu(edge_serial
->boot_descriptor
.BuildNumber
),
344 BootMajorVersion
, BootMinorVersion
, BootBuildNumber
);
346 dbg("Downloading new Boot Image");
348 for (rec
= ihex_next_binrec(rec
); rec
;
349 rec
= ihex_next_binrec(rec
)) {
350 Bootaddr
= be32_to_cpu(rec
->addr
);
351 response
= rom_write(edge_serial
->serial
,
354 be16_to_cpu(rec
->len
),
357 dev_err(&edge_serial
->serial
->dev
->dev
,
358 "rom_write failed (%x, %x, %d)\n",
359 Bootaddr
>> 16, Bootaddr
& 0xFFFF,
360 be16_to_cpu(rec
->len
));
365 dbg("Boot Image -- already up to date");
367 release_firmware(fw
);
371 /************************************************************************
373 * Get string descriptor from device *
375 ************************************************************************/
376 static int get_string(struct usb_device
*dev
, int Id
, char *string
, int buflen
)
378 struct usb_string_descriptor StringDesc
;
379 struct usb_string_descriptor
*pStringDesc
;
381 dbg("%s - USB String ID = %d", __func__
, Id
);
383 if (!usb_get_descriptor(dev
, USB_DT_STRING
, Id
,
384 &StringDesc
, sizeof(StringDesc
)))
387 pStringDesc
= kmalloc(StringDesc
.bLength
, GFP_KERNEL
);
391 if (!usb_get_descriptor(dev
, USB_DT_STRING
, Id
,
392 pStringDesc
, StringDesc
.bLength
)) {
397 unicode_to_ascii(string
, buflen
,
398 pStringDesc
->wData
, pStringDesc
->bLength
/2);
401 dbg("%s - USB String %s", __func__
, string
);
402 return strlen(string
);
407 /************************************************************************
409 * Get string descriptor from device
411 ************************************************************************/
412 static int get_string_desc(struct usb_device
*dev
, int Id
,
413 struct usb_string_descriptor
**pRetDesc
)
415 struct usb_string_descriptor StringDesc
;
416 struct usb_string_descriptor
*pStringDesc
;
418 dbg("%s - USB String ID = %d", __func__
, Id
);
420 if (!usb_get_descriptor(dev
, USB_DT_STRING
, Id
, &StringDesc
,
424 pStringDesc
= kmalloc(StringDesc
.bLength
, GFP_KERNEL
);
428 if (!usb_get_descriptor(dev
, USB_DT_STRING
, Id
, pStringDesc
,
429 StringDesc
.bLength
)) {
434 *pRetDesc
= pStringDesc
;
439 static void dump_product_info(struct edgeport_product_info
*product_info
)
441 /* Dump Product Info structure */
442 dbg("**Product Information:");
443 dbg(" ProductId %x", product_info
->ProductId
);
444 dbg(" NumPorts %d", product_info
->NumPorts
);
445 dbg(" ProdInfoVer %d", product_info
->ProdInfoVer
);
446 dbg(" IsServer %d", product_info
->IsServer
);
447 dbg(" IsRS232 %d", product_info
->IsRS232
);
448 dbg(" IsRS422 %d", product_info
->IsRS422
);
449 dbg(" IsRS485 %d", product_info
->IsRS485
);
450 dbg(" RomSize %d", product_info
->RomSize
);
451 dbg(" RamSize %d", product_info
->RamSize
);
452 dbg(" CpuRev %x", product_info
->CpuRev
);
453 dbg(" BoardRev %x", product_info
->BoardRev
);
454 dbg(" BootMajorVersion %d.%d.%d", product_info
->BootMajorVersion
,
455 product_info
->BootMinorVersion
,
456 le16_to_cpu(product_info
->BootBuildNumber
));
457 dbg(" FirmwareMajorVersion %d.%d.%d",
458 product_info
->FirmwareMajorVersion
,
459 product_info
->FirmwareMinorVersion
,
460 le16_to_cpu(product_info
->FirmwareBuildNumber
));
461 dbg(" ManufactureDescDate %d/%d/%d",
462 product_info
->ManufactureDescDate
[0],
463 product_info
->ManufactureDescDate
[1],
464 product_info
->ManufactureDescDate
[2]+1900);
465 dbg(" iDownloadFile 0x%x", product_info
->iDownloadFile
);
466 dbg(" EpicVer %d", product_info
->EpicVer
);
469 static void get_product_info(struct edgeport_serial
*edge_serial
)
471 struct edgeport_product_info
*product_info
= &edge_serial
->product_info
;
473 memset(product_info
, 0, sizeof(struct edgeport_product_info
));
475 product_info
->ProductId
= (__u16
)(le16_to_cpu(edge_serial
->serial
->dev
->descriptor
.idProduct
) & ~ION_DEVICE_ID_80251_NETCHIP
);
476 product_info
->NumPorts
= edge_serial
->manuf_descriptor
.NumPorts
;
477 product_info
->ProdInfoVer
= 0;
479 product_info
->RomSize
= edge_serial
->manuf_descriptor
.RomSize
;
480 product_info
->RamSize
= edge_serial
->manuf_descriptor
.RamSize
;
481 product_info
->CpuRev
= edge_serial
->manuf_descriptor
.CpuRev
;
482 product_info
->BoardRev
= edge_serial
->manuf_descriptor
.BoardRev
;
484 product_info
->BootMajorVersion
=
485 edge_serial
->boot_descriptor
.MajorVersion
;
486 product_info
->BootMinorVersion
=
487 edge_serial
->boot_descriptor
.MinorVersion
;
488 product_info
->BootBuildNumber
=
489 edge_serial
->boot_descriptor
.BuildNumber
;
491 memcpy(product_info
->ManufactureDescDate
,
492 edge_serial
->manuf_descriptor
.DescDate
,
493 sizeof(edge_serial
->manuf_descriptor
.DescDate
));
495 /* check if this is 2nd generation hardware */
496 if (le16_to_cpu(edge_serial
->serial
->dev
->descriptor
.idProduct
)
497 & ION_DEVICE_ID_80251_NETCHIP
)
498 product_info
->iDownloadFile
= EDGE_DOWNLOAD_FILE_80251
;
500 product_info
->iDownloadFile
= EDGE_DOWNLOAD_FILE_I930
;
502 /* Determine Product type and set appropriate flags */
503 switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info
->ProductId
)) {
504 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE
:
505 case ION_DEVICE_ID_EDGEPORT_4T
:
506 case ION_DEVICE_ID_EDGEPORT_4
:
507 case ION_DEVICE_ID_EDGEPORT_2
:
508 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU
:
509 case ION_DEVICE_ID_EDGEPORT_8
:
510 case ION_DEVICE_ID_EDGEPORT_421
:
511 case ION_DEVICE_ID_EDGEPORT_21
:
512 case ION_DEVICE_ID_EDGEPORT_2_DIN
:
513 case ION_DEVICE_ID_EDGEPORT_4_DIN
:
514 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU
:
515 product_info
->IsRS232
= 1;
518 case ION_DEVICE_ID_EDGEPORT_2I
: /* Edgeport/2 RS422/RS485 */
519 product_info
->IsRS422
= 1;
520 product_info
->IsRS485
= 1;
523 case ION_DEVICE_ID_EDGEPORT_8I
: /* Edgeport/4 RS422 */
524 case ION_DEVICE_ID_EDGEPORT_4I
: /* Edgeport/4 RS422 */
525 product_info
->IsRS422
= 1;
529 dump_product_info(product_info
);
532 static int get_epic_descriptor(struct edgeport_serial
*ep
)
535 struct usb_serial
*serial
= ep
->serial
;
536 struct edgeport_product_info
*product_info
= &ep
->product_info
;
537 struct edge_compatibility_descriptor
*epic
= &ep
->epic_descriptor
;
538 struct edge_compatibility_bits
*bits
;
541 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
542 USB_REQUEST_ION_GET_EPIC_DESC
,
544 &ep
->epic_descriptor
,
545 sizeof(struct edge_compatibility_descriptor
),
548 dbg("%s result = %d", __func__
, result
);
552 memset(product_info
, 0, sizeof(struct edgeport_product_info
));
554 product_info
->NumPorts
= epic
->NumPorts
;
555 product_info
->ProdInfoVer
= 0;
556 product_info
->FirmwareMajorVersion
= epic
->MajorVersion
;
557 product_info
->FirmwareMinorVersion
= epic
->MinorVersion
;
558 product_info
->FirmwareBuildNumber
= epic
->BuildNumber
;
559 product_info
->iDownloadFile
= epic
->iDownloadFile
;
560 product_info
->EpicVer
= epic
->EpicVer
;
561 product_info
->Epic
= epic
->Supports
;
562 product_info
->ProductId
= ION_DEVICE_ID_EDGEPORT_COMPATIBLE
;
563 dump_product_info(product_info
);
565 bits
= &ep
->epic_descriptor
.Supports
;
566 dbg("**EPIC descriptor:");
567 dbg(" VendEnableSuspend: %s", bits
->VendEnableSuspend
? "TRUE": "FALSE");
568 dbg(" IOSPOpen : %s", bits
->IOSPOpen
? "TRUE": "FALSE");
569 dbg(" IOSPClose : %s", bits
->IOSPClose
? "TRUE": "FALSE");
570 dbg(" IOSPChase : %s", bits
->IOSPChase
? "TRUE": "FALSE");
571 dbg(" IOSPSetRxFlow : %s", bits
->IOSPSetRxFlow
? "TRUE": "FALSE");
572 dbg(" IOSPSetTxFlow : %s", bits
->IOSPSetTxFlow
? "TRUE": "FALSE");
573 dbg(" IOSPSetXChar : %s", bits
->IOSPSetXChar
? "TRUE": "FALSE");
574 dbg(" IOSPRxCheck : %s", bits
->IOSPRxCheck
? "TRUE": "FALSE");
575 dbg(" IOSPSetClrBreak : %s", bits
->IOSPSetClrBreak
? "TRUE": "FALSE");
576 dbg(" IOSPWriteMCR : %s", bits
->IOSPWriteMCR
? "TRUE": "FALSE");
577 dbg(" IOSPWriteLCR : %s", bits
->IOSPWriteLCR
? "TRUE": "FALSE");
578 dbg(" IOSPSetBaudRate : %s", bits
->IOSPSetBaudRate
? "TRUE": "FALSE");
579 dbg(" TrueEdgeport : %s", bits
->TrueEdgeport
? "TRUE": "FALSE");
586 /************************************************************************/
587 /************************************************************************/
588 /* U S B C A L L B A C K F U N C T I O N S */
589 /* U S B C A L L B A C K F U N C T I O N S */
590 /************************************************************************/
591 /************************************************************************/
593 /*****************************************************************************
594 * edge_interrupt_callback
595 * this is the callback function for when we have received data on the
596 * interrupt endpoint.
597 *****************************************************************************/
598 static void edge_interrupt_callback(struct urb
*urb
)
600 struct edgeport_serial
*edge_serial
= urb
->context
;
601 struct edgeport_port
*edge_port
;
602 struct usb_serial_port
*port
;
603 struct tty_struct
*tty
;
604 unsigned char *data
= urb
->transfer_buffer
;
605 int length
= urb
->actual_length
;
611 int status
= urb
->status
;
622 /* this urb is terminated, clean up */
623 dbg("%s - urb shutting down with status: %d",
627 dbg("%s - nonzero urb status received: %d", __func__
, status
);
631 /* process this interrupt-read even if there are no ports open */
633 usb_serial_debug_data(debug
, &edge_serial
->serial
->dev
->dev
,
634 __func__
, length
, data
);
637 bytes_avail
= data
[0] | (data
[1] << 8);
639 spin_lock(&edge_serial
->es_lock
);
640 edge_serial
->rxBytesAvail
+= bytes_avail
;
641 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__
, bytes_avail
, edge_serial
->rxBytesAvail
, edge_serial
->read_in_progress
);
643 if (edge_serial
->rxBytesAvail
> 0 &&
644 !edge_serial
->read_in_progress
) {
645 dbg("%s - posting a read", __func__
);
646 edge_serial
->read_in_progress
= true;
648 /* we have pending bytes on the
649 bulk in pipe, send a request */
650 edge_serial
->read_urb
->dev
= edge_serial
->serial
->dev
;
651 result
= usb_submit_urb(edge_serial
->read_urb
, GFP_ATOMIC
);
653 dev_err(&edge_serial
->serial
->dev
->dev
, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__
, result
);
654 edge_serial
->read_in_progress
= false;
657 spin_unlock(&edge_serial
->es_lock
);
660 /* grab the txcredits for the ports if available */
663 while ((position
< length
) &&
664 (portNumber
< edge_serial
->serial
->num_ports
)) {
665 txCredits
= data
[position
] | (data
[position
+1] << 8);
667 port
= edge_serial
->serial
->port
[portNumber
];
668 edge_port
= usb_get_serial_port_data(port
);
669 if (edge_port
->open
) {
670 spin_lock(&edge_port
->ep_lock
);
671 edge_port
->txCredits
+= txCredits
;
672 spin_unlock(&edge_port
->ep_lock
);
673 dbg("%s - txcredits for port%d = %d",
674 __func__
, portNumber
,
675 edge_port
->txCredits
);
677 /* tell the tty driver that something
679 tty
= tty_port_tty_get(
680 &edge_port
->port
->port
);
685 /* Since we have more credit, check
686 if more data can be sent */
687 send_more_port_data(edge_serial
,
697 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
699 dev_err(&urb
->dev
->dev
,
700 "%s - Error %d submitting control urb\n",
705 /*****************************************************************************
706 * edge_bulk_in_callback
707 * this is the callback function for when we have received data on the
709 *****************************************************************************/
710 static void edge_bulk_in_callback(struct urb
*urb
)
712 struct edgeport_serial
*edge_serial
= urb
->context
;
713 unsigned char *data
= urb
->transfer_buffer
;
715 __u16 raw_data_length
;
716 int status
= urb
->status
;
721 dbg("%s - nonzero read bulk status received: %d",
723 edge_serial
->read_in_progress
= false;
727 if (urb
->actual_length
== 0) {
728 dbg("%s - read bulk callback with no data", __func__
);
729 edge_serial
->read_in_progress
= false;
733 raw_data_length
= urb
->actual_length
;
735 usb_serial_debug_data(debug
, &edge_serial
->serial
->dev
->dev
,
736 __func__
, raw_data_length
, data
);
738 spin_lock(&edge_serial
->es_lock
);
740 /* decrement our rxBytes available by the number that we just got */
741 edge_serial
->rxBytesAvail
-= raw_data_length
;
743 dbg("%s - Received = %d, rxBytesAvail %d", __func__
,
744 raw_data_length
, edge_serial
->rxBytesAvail
);
746 process_rcvd_data(edge_serial
, data
, urb
->actual_length
);
748 /* check to see if there's any more data for us to read */
749 if (edge_serial
->rxBytesAvail
> 0) {
750 dbg("%s - posting a read", __func__
);
751 edge_serial
->read_urb
->dev
= edge_serial
->serial
->dev
;
752 retval
= usb_submit_urb(edge_serial
->read_urb
, GFP_ATOMIC
);
754 dev_err(&urb
->dev
->dev
,
755 "%s - usb_submit_urb(read bulk) failed, "
756 "retval = %d\n", __func__
, retval
);
757 edge_serial
->read_in_progress
= false;
760 edge_serial
->read_in_progress
= false;
763 spin_unlock(&edge_serial
->es_lock
);
767 /*****************************************************************************
768 * edge_bulk_out_data_callback
769 * this is the callback function for when we have finished sending
770 * serial data on the bulk out endpoint.
771 *****************************************************************************/
772 static void edge_bulk_out_data_callback(struct urb
*urb
)
774 struct edgeport_port
*edge_port
= urb
->context
;
775 struct tty_struct
*tty
;
776 int status
= urb
->status
;
781 dbg("%s - nonzero write bulk status received: %d",
785 tty
= tty_port_tty_get(&edge_port
->port
->port
);
787 if (tty
&& edge_port
->open
) {
788 /* let the tty driver wakeup if it has a special
789 write_wakeup function */
794 /* Release the Write URB */
795 edge_port
->write_in_progress
= false;
797 /* Check if more data needs to be sent */
798 send_more_port_data((struct edgeport_serial
*)
799 (usb_get_serial_data(edge_port
->port
->serial
)), edge_port
);
803 /*****************************************************************************
805 * this is the callback function for when we have finished sending a
806 * command on the bulk out endpoint.
807 *****************************************************************************/
808 static void edge_bulk_out_cmd_callback(struct urb
*urb
)
810 struct edgeport_port
*edge_port
= urb
->context
;
811 struct tty_struct
*tty
;
812 int status
= urb
->status
;
816 atomic_dec(&CmdUrbs
);
817 dbg("%s - FREE URB %p (outstanding %d)", __func__
,
818 urb
, atomic_read(&CmdUrbs
));
821 /* clean up the transfer buffer */
822 kfree(urb
->transfer_buffer
);
824 /* Free the command urb */
828 dbg("%s - nonzero write bulk status received: %d",
833 /* Get pointer to tty */
834 tty
= tty_port_tty_get(&edge_port
->port
->port
);
836 /* tell the tty driver that something has changed */
837 if (tty
&& edge_port
->open
)
841 /* we have completed the command */
842 edge_port
->commandPending
= false;
843 wake_up(&edge_port
->wait_command
);
847 /*****************************************************************************
848 * Driver tty interface functions
849 *****************************************************************************/
851 /*****************************************************************************
853 * this function is called by the tty driver when a port is opened
854 * If successful, we return 0
855 * Otherwise we return a negative error number.
856 *****************************************************************************/
857 static int edge_open(struct tty_struct
*tty
,
858 struct usb_serial_port
*port
, struct file
*filp
)
860 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
861 struct usb_serial
*serial
;
862 struct edgeport_serial
*edge_serial
;
865 dbg("%s - port %d", __func__
, port
->number
);
867 if (edge_port
== NULL
)
871 tty
->low_latency
= low_latency
;
873 /* see if we've set up our endpoint info yet (can't set it up
874 in edge_startup as the structures were not set up at that time.) */
875 serial
= port
->serial
;
876 edge_serial
= usb_get_serial_data(serial
);
877 if (edge_serial
== NULL
)
879 if (edge_serial
->interrupt_in_buffer
== NULL
) {
880 struct usb_serial_port
*port0
= serial
->port
[0];
882 /* not set up yet, so do it now */
883 edge_serial
->interrupt_in_buffer
=
884 port0
->interrupt_in_buffer
;
885 edge_serial
->interrupt_in_endpoint
=
886 port0
->interrupt_in_endpointAddress
;
887 edge_serial
->interrupt_read_urb
= port0
->interrupt_in_urb
;
888 edge_serial
->bulk_in_buffer
= port0
->bulk_in_buffer
;
889 edge_serial
->bulk_in_endpoint
=
890 port0
->bulk_in_endpointAddress
;
891 edge_serial
->read_urb
= port0
->read_urb
;
892 edge_serial
->bulk_out_endpoint
=
893 port0
->bulk_out_endpointAddress
;
895 /* set up our interrupt urb */
896 usb_fill_int_urb(edge_serial
->interrupt_read_urb
,
898 usb_rcvintpipe(serial
->dev
,
899 port0
->interrupt_in_endpointAddress
),
900 port0
->interrupt_in_buffer
,
901 edge_serial
->interrupt_read_urb
->transfer_buffer_length
,
902 edge_interrupt_callback
, edge_serial
,
903 edge_serial
->interrupt_read_urb
->interval
);
905 /* set up our bulk in urb */
906 usb_fill_bulk_urb(edge_serial
->read_urb
, serial
->dev
,
907 usb_rcvbulkpipe(serial
->dev
,
908 port0
->bulk_in_endpointAddress
),
909 port0
->bulk_in_buffer
,
910 edge_serial
->read_urb
->transfer_buffer_length
,
911 edge_bulk_in_callback
, edge_serial
);
912 edge_serial
->read_in_progress
= false;
914 /* start interrupt read for this edgeport
915 * this interrupt will continue as long
916 * as the edgeport is connected */
917 response
= usb_submit_urb(edge_serial
->interrupt_read_urb
,
921 "%s - Error %d submitting control urb\n",
926 /* initialize our wait queues */
927 init_waitqueue_head(&edge_port
->wait_open
);
928 init_waitqueue_head(&edge_port
->wait_chase
);
929 init_waitqueue_head(&edge_port
->delta_msr_wait
);
930 init_waitqueue_head(&edge_port
->wait_command
);
932 /* initialize our icount structure */
933 memset(&(edge_port
->icount
), 0x00, sizeof(edge_port
->icount
));
935 /* initialize our port settings */
936 edge_port
->txCredits
= 0; /* Can't send any data yet */
937 /* Must always set this bit to enable ints! */
938 edge_port
->shadowMCR
= MCR_MASTER_IE
;
939 edge_port
->chaseResponsePending
= false;
941 /* send a open port command */
942 edge_port
->openPending
= true;
943 edge_port
->open
= false;
944 response
= send_iosp_ext_cmd(edge_port
, IOSP_CMD_OPEN_PORT
, 0);
947 dev_err(&port
->dev
, "%s - error sending open port command\n",
949 edge_port
->openPending
= false;
953 /* now wait for the port to be completely opened */
954 wait_event_timeout(edge_port
->wait_open
, !edge_port
->openPending
,
957 if (!edge_port
->open
) {
959 dbg("%s - open timedout", __func__
);
960 edge_port
->openPending
= false;
964 /* create the txfifo */
965 edge_port
->txfifo
.head
= 0;
966 edge_port
->txfifo
.tail
= 0;
967 edge_port
->txfifo
.count
= 0;
968 edge_port
->txfifo
.size
= edge_port
->maxTxCredits
;
969 edge_port
->txfifo
.fifo
= kmalloc(edge_port
->maxTxCredits
, GFP_KERNEL
);
971 if (!edge_port
->txfifo
.fifo
) {
972 dbg("%s - no memory", __func__
);
973 edge_close(tty
, port
, filp
);
977 /* Allocate a URB for the write */
978 edge_port
->write_urb
= usb_alloc_urb(0, GFP_KERNEL
);
979 edge_port
->write_in_progress
= false;
981 if (!edge_port
->write_urb
) {
982 dbg("%s - no memory", __func__
);
983 edge_close(tty
, port
, filp
);
987 dbg("%s(%d) - Initialize TX fifo to %d bytes",
988 __func__
, port
->number
, edge_port
->maxTxCredits
);
990 dbg("%s exited", __func__
);
996 /************************************************************************
998 * block_until_chase_response
1000 * This function will block the close until one of the following:
1001 * 1. Response to our Chase comes from Edgeport
1002 * 2. A timeout of 10 seconds without activity has expired
1003 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
1005 ************************************************************************/
1006 static void block_until_chase_response(struct edgeport_port
*edge_port
)
1014 /* Save Last credits */
1015 lastCredits
= edge_port
->txCredits
;
1017 /* Did we get our Chase response */
1018 if (!edge_port
->chaseResponsePending
) {
1019 dbg("%s - Got Chase Response", __func__
);
1021 /* did we get all of our credit back? */
1022 if (edge_port
->txCredits
== edge_port
->maxTxCredits
) {
1023 dbg("%s - Got all credits", __func__
);
1028 /* Block the thread for a while */
1029 prepare_to_wait(&edge_port
->wait_chase
, &wait
,
1030 TASK_UNINTERRUPTIBLE
);
1031 schedule_timeout(timeout
);
1032 finish_wait(&edge_port
->wait_chase
, &wait
);
1034 if (lastCredits
== edge_port
->txCredits
) {
1035 /* No activity.. count down. */
1038 edge_port
->chaseResponsePending
= false;
1039 dbg("%s - Chase TIMEOUT", __func__
);
1043 /* Reset timeout value back to 10 seconds */
1044 dbg("%s - Last %d, Current %d", __func__
,
1045 lastCredits
, edge_port
->txCredits
);
1052 /************************************************************************
1054 * block_until_tx_empty
1056 * This function will block the close until one of the following:
1058 * 2. The edgeport has stopped
1059 * 3. A timeout of 3 seconds without activity has expired
1061 ************************************************************************/
1062 static void block_until_tx_empty(struct edgeport_port
*edge_port
)
1065 struct TxFifo
*fifo
= &edge_port
->txfifo
;
1067 int timeout
= HZ
/10;
1071 /* Save Last count */
1072 lastCount
= fifo
->count
;
1074 /* Is the Edgeport Buffer empty? */
1075 if (lastCount
== 0) {
1076 dbg("%s - TX Buffer Empty", __func__
);
1080 /* Block the thread for a while */
1081 prepare_to_wait(&edge_port
->wait_chase
, &wait
,
1082 TASK_UNINTERRUPTIBLE
);
1083 schedule_timeout(timeout
);
1084 finish_wait(&edge_port
->wait_chase
, &wait
);
1086 dbg("%s wait", __func__
);
1088 if (lastCount
== fifo
->count
) {
1089 /* No activity.. count down. */
1092 dbg("%s - TIMEOUT", __func__
);
1096 /* Reset timeout value back to seconds */
1103 /*****************************************************************************
1105 * this function is called by the tty driver when a port is closed
1106 *****************************************************************************/
1107 static void edge_close(struct tty_struct
*tty
,
1108 struct usb_serial_port
*port
, struct file
*filp
)
1110 struct edgeport_serial
*edge_serial
;
1111 struct edgeport_port
*edge_port
;
1114 dbg("%s - port %d", __func__
, port
->number
);
1116 edge_serial
= usb_get_serial_data(port
->serial
);
1117 edge_port
= usb_get_serial_port_data(port
);
1118 if (edge_serial
== NULL
|| edge_port
== NULL
)
1121 /* block until tx is empty */
1122 block_until_tx_empty(edge_port
);
1124 edge_port
->closePending
= true;
1126 if ((!edge_serial
->is_epic
) ||
1127 ((edge_serial
->is_epic
) &&
1128 (edge_serial
->epic_descriptor
.Supports
.IOSPChase
))) {
1129 /* flush and chase */
1130 edge_port
->chaseResponsePending
= true;
1132 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__
);
1133 status
= send_iosp_ext_cmd(edge_port
, IOSP_CMD_CHASE_PORT
, 0);
1135 /* block until chase finished */
1136 block_until_chase_response(edge_port
);
1138 edge_port
->chaseResponsePending
= false;
1141 if ((!edge_serial
->is_epic
) ||
1142 ((edge_serial
->is_epic
) &&
1143 (edge_serial
->epic_descriptor
.Supports
.IOSPClose
))) {
1144 /* close the port */
1145 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__
);
1146 send_iosp_ext_cmd(edge_port
, IOSP_CMD_CLOSE_PORT
, 0);
1149 /* port->close = true; */
1150 edge_port
->closePending
= false;
1151 edge_port
->open
= false;
1152 edge_port
->openPending
= false;
1154 usb_kill_urb(edge_port
->write_urb
);
1156 if (edge_port
->write_urb
) {
1157 /* if this urb had a transfer buffer already
1158 (old transfer) free it */
1159 kfree(edge_port
->write_urb
->transfer_buffer
);
1160 usb_free_urb(edge_port
->write_urb
);
1161 edge_port
->write_urb
= NULL
;
1163 kfree(edge_port
->txfifo
.fifo
);
1164 edge_port
->txfifo
.fifo
= NULL
;
1166 dbg("%s exited", __func__
);
1169 /*****************************************************************************
1171 * this function is called by the tty driver when data should be written
1173 * If successful, we return the number of bytes written, otherwise we
1174 * return a negative error number.
1175 *****************************************************************************/
1176 static int edge_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1177 const unsigned char *data
, int count
)
1179 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1180 struct TxFifo
*fifo
;
1185 unsigned long flags
;
1187 dbg("%s - port %d", __func__
, port
->number
);
1189 if (edge_port
== NULL
)
1192 /* get a pointer to the Tx fifo */
1193 fifo
= &edge_port
->txfifo
;
1195 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1197 /* calculate number of bytes to put in fifo */
1198 copySize
= min((unsigned int)count
,
1199 (edge_port
->txCredits
- fifo
->count
));
1201 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes",
1202 __func__
, port
->number
, count
,
1203 edge_port
->txCredits
- fifo
->count
, copySize
);
1205 /* catch writes of 0 bytes which the tty driver likes to give us,
1206 and when txCredits is empty */
1207 if (copySize
== 0) {
1208 dbg("%s - copySize = Zero", __func__
);
1213 * since we can never overflow the buffer we do not have to check for a
1216 * the copy is done is two parts -- first fill to the end of the buffer
1217 * then copy the reset from the start of the buffer
1219 bytesleft
= fifo
->size
- fifo
->head
;
1220 firsthalf
= min(bytesleft
, copySize
);
1221 dbg("%s - copy %d bytes of %d into fifo ", __func__
,
1222 firsthalf
, bytesleft
);
1224 /* now copy our data */
1225 memcpy(&fifo
->fifo
[fifo
->head
], data
, firsthalf
);
1226 usb_serial_debug_data(debug
, &port
->dev
, __func__
,
1227 firsthalf
, &fifo
->fifo
[fifo
->head
]);
1229 /* update the index and size */
1230 fifo
->head
+= firsthalf
;
1231 fifo
->count
+= firsthalf
;
1233 /* wrap the index */
1234 if (fifo
->head
== fifo
->size
)
1237 secondhalf
= copySize
-firsthalf
;
1240 dbg("%s - copy rest of data %d", __func__
, secondhalf
);
1241 memcpy(&fifo
->fifo
[fifo
->head
], &data
[firsthalf
], secondhalf
);
1242 usb_serial_debug_data(debug
, &port
->dev
, __func__
,
1243 secondhalf
, &fifo
->fifo
[fifo
->head
]);
1244 /* update the index and size */
1245 fifo
->count
+= secondhalf
;
1246 fifo
->head
+= secondhalf
;
1247 /* No need to check for wrap since we can not get to end of
1248 * the fifo in this part
1253 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1255 send_more_port_data((struct edgeport_serial
*)
1256 usb_get_serial_data(port
->serial
), edge_port
);
1258 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__
,
1259 copySize
, edge_port
->txCredits
, fifo
->count
);
1265 /************************************************************************
1267 * send_more_port_data()
1269 * This routine attempts to write additional UART transmit data
1270 * to a port over the USB bulk pipe. It is called (1) when new
1271 * data has been written to a port's TxBuffer from higher layers
1272 * (2) when the peripheral sends us additional TxCredits indicating
1273 * that it can accept more Tx data for a given port; and (3) when
1274 * a bulk write completes successfully and we want to see if we
1275 * can transmit more.
1277 ************************************************************************/
1278 static void send_more_port_data(struct edgeport_serial
*edge_serial
,
1279 struct edgeport_port
*edge_port
)
1281 struct TxFifo
*fifo
= &edge_port
->txfifo
;
1283 unsigned char *buffer
;
1289 unsigned long flags
;
1291 dbg("%s(%d)", __func__
, edge_port
->port
->number
);
1293 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1295 if (edge_port
->write_in_progress
||
1297 (fifo
->count
== 0)) {
1298 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1299 __func__
, edge_port
->port
->number
,
1300 fifo
->count
, edge_port
->write_in_progress
);
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
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.
1311 if (edge_port
->txCredits
< EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port
->maxTxCredits
, EDGE_FW_BULK_MAX_PACKET_SIZE
)) {
1312 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1313 __func__
, edge_port
->port
->number
, fifo
->count
,
1314 edge_port
->txCredits
);
1318 /* lock this write */
1319 edge_port
->write_in_progress
= true;
1321 /* get a pointer to the write_urb */
1322 urb
= edge_port
->write_urb
;
1324 /* make sure transfer buffer is freed */
1325 kfree(urb
->transfer_buffer
);
1326 urb
->transfer_buffer
= NULL
;
1328 /* build the data header for the buffer and port that we are about
1330 count
= fifo
->count
;
1331 buffer
= kmalloc(count
+2, GFP_ATOMIC
);
1332 if (buffer
== NULL
) {
1333 dev_err(&edge_port
->port
->dev
,
1334 "%s - no more kernel memory...\n", __func__
);
1335 edge_port
->write_in_progress
= false;
1338 buffer
[0] = IOSP_BUILD_DATA_HDR1(edge_port
->port
->number
1339 - edge_port
->port
->serial
->minor
, count
);
1340 buffer
[1] = IOSP_BUILD_DATA_HDR2(edge_port
->port
->number
1341 - edge_port
->port
->serial
->minor
, count
);
1343 /* now copy our data */
1344 bytesleft
= fifo
->size
- fifo
->tail
;
1345 firsthalf
= min(bytesleft
, count
);
1346 memcpy(&buffer
[2], &fifo
->fifo
[fifo
->tail
], firsthalf
);
1347 fifo
->tail
+= firsthalf
;
1348 fifo
->count
-= firsthalf
;
1349 if (fifo
->tail
== fifo
->size
)
1352 secondhalf
= count
-firsthalf
;
1354 memcpy(&buffer
[2+firsthalf
], &fifo
->fifo
[fifo
->tail
],
1356 fifo
->tail
+= secondhalf
;
1357 fifo
->count
-= secondhalf
;
1361 usb_serial_debug_data(debug
, &edge_port
->port
->dev
,
1362 __func__
, count
, &buffer
[2]);
1364 /* fill up the urb with all of our data and submit it */
1365 usb_fill_bulk_urb(urb
, edge_serial
->serial
->dev
,
1366 usb_sndbulkpipe(edge_serial
->serial
->dev
,
1367 edge_serial
->bulk_out_endpoint
),
1369 edge_bulk_out_data_callback
, edge_port
);
1371 /* decrement the number of credits we have by the number we just sent */
1372 edge_port
->txCredits
-= count
;
1373 edge_port
->icount
.tx
+= count
;
1375 urb
->dev
= edge_serial
->serial
->dev
;
1376 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1378 /* something went wrong */
1379 dev_err(&edge_port
->port
->dev
,
1380 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1382 edge_port
->write_in_progress
= false;
1384 /* revert the credits as something bad happened. */
1385 edge_port
->txCredits
+= count
;
1386 edge_port
->icount
.tx
-= count
;
1388 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1389 __func__
, count
, edge_port
->txCredits
, fifo
->count
);
1392 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1396 /*****************************************************************************
1398 * this function is called by the tty driver when it wants to know how
1399 * many bytes of data we can accept for a specific port. If successful,
1400 * we return the amount of room that we have for this port (the txCredits)
1401 * otherwise we return a negative error number.
1402 *****************************************************************************/
1403 static int edge_write_room(struct tty_struct
*tty
)
1405 struct usb_serial_port
*port
= tty
->driver_data
;
1406 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1408 unsigned long flags
;
1410 dbg("%s", __func__
);
1412 if (edge_port
== NULL
)
1414 if (edge_port
->closePending
)
1417 dbg("%s - port %d", __func__
, port
->number
);
1419 if (!edge_port
->open
) {
1420 dbg("%s - port not opened", __func__
);
1424 /* total of both buffers is still txCredit */
1425 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1426 room
= edge_port
->txCredits
- edge_port
->txfifo
.count
;
1427 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1429 dbg("%s - returns %d", __func__
, room
);
1434 /*****************************************************************************
1435 * edge_chars_in_buffer
1436 * this function is called by the tty driver when it wants to know how
1437 * many bytes of data we currently have outstanding in the port (data that
1438 * has been written, but hasn't made it out the port yet)
1439 * If successful, we return the number of bytes left to be written in the
1441 * Otherwise we return a negative error number.
1442 *****************************************************************************/
1443 static int edge_chars_in_buffer(struct tty_struct
*tty
)
1445 struct usb_serial_port
*port
= tty
->driver_data
;
1446 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1448 unsigned long flags
;
1450 dbg("%s", __func__
);
1452 if (edge_port
== NULL
)
1454 if (edge_port
->closePending
)
1457 if (!edge_port
->open
) {
1458 dbg("%s - port not opened", __func__
);
1462 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1463 num_chars
= edge_port
->maxTxCredits
- edge_port
->txCredits
+
1464 edge_port
->txfifo
.count
;
1465 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1467 dbg("%s(port %d) - returns %d", __func__
,
1468 port
->number
, num_chars
);
1475 /*****************************************************************************
1477 * this function is called by the tty driver when it wants to stop the data
1478 * being read from the port.
1479 *****************************************************************************/
1480 static void edge_throttle(struct tty_struct
*tty
)
1482 struct usb_serial_port
*port
= tty
->driver_data
;
1483 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1486 dbg("%s - port %d", __func__
, port
->number
);
1488 if (edge_port
== NULL
)
1491 if (!edge_port
->open
) {
1492 dbg("%s - port not opened", __func__
);
1496 /* if we are implementing XON/XOFF, send the stop character */
1498 unsigned char stop_char
= STOP_CHAR(tty
);
1499 status
= edge_write(tty
, port
, &stop_char
, 1);
1504 /* if we are implementing RTS/CTS, toggle that line */
1505 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1506 edge_port
->shadowMCR
&= ~MCR_RTS
;
1507 status
= send_cmd_write_uart_register(edge_port
, MCR
,
1508 edge_port
->shadowMCR
);
1517 /*****************************************************************************
1519 * this function is called by the tty driver when it wants to resume the
1520 * data being read from the port (called after SerialThrottle is called)
1521 *****************************************************************************/
1522 static void edge_unthrottle(struct tty_struct
*tty
)
1524 struct usb_serial_port
*port
= tty
->driver_data
;
1525 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1528 dbg("%s - port %d", __func__
, port
->number
);
1530 if (edge_port
== NULL
)
1533 if (!edge_port
->open
) {
1534 dbg("%s - port not opened", __func__
);
1538 /* if we are implementing XON/XOFF, send the start character */
1540 unsigned char start_char
= START_CHAR(tty
);
1541 status
= edge_write(tty
, port
, &start_char
, 1);
1545 /* if we are implementing RTS/CTS, toggle that line */
1546 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1547 edge_port
->shadowMCR
|= MCR_RTS
;
1548 send_cmd_write_uart_register(edge_port
, MCR
,
1549 edge_port
->shadowMCR
);
1554 /*****************************************************************************
1556 * this function is called by the tty driver when it wants to change
1557 * the termios structure
1558 *****************************************************************************/
1559 static void edge_set_termios(struct tty_struct
*tty
,
1560 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
1562 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1565 cflag
= tty
->termios
->c_cflag
;
1566 dbg("%s - clfag %08x iflag %08x", __func__
,
1567 tty
->termios
->c_cflag
, tty
->termios
->c_iflag
);
1568 dbg("%s - old clfag %08x old iflag %08x", __func__
,
1569 old_termios
->c_cflag
, old_termios
->c_iflag
);
1571 dbg("%s - port %d", __func__
, port
->number
);
1573 if (edge_port
== NULL
)
1576 if (!edge_port
->open
) {
1577 dbg("%s - port not opened", __func__
);
1581 /* change the port settings to the new ones specified */
1582 change_port_settings(tty
, edge_port
, old_termios
);
1586 /*****************************************************************************
1587 * get_lsr_info - get line status register info
1589 * Purpose: Let user call ioctl() to get info when the UART physically
1590 * is emptied. On bus types like RS485, the transmitter must
1591 * release the bus after transmitting. This must be done when
1592 * the transmit shift register is empty, not be done when the
1593 * transmit holding register is empty. This functionality
1594 * allows an RS485 driver to be written in user space.
1595 *****************************************************************************/
1596 static int get_lsr_info(struct edgeport_port
*edge_port
,
1597 unsigned int __user
*value
)
1599 unsigned int result
= 0;
1600 unsigned long flags
;
1602 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1603 if (edge_port
->maxTxCredits
== edge_port
->txCredits
&&
1604 edge_port
->txfifo
.count
== 0) {
1605 dbg("%s -- Empty", __func__
);
1606 result
= TIOCSER_TEMT
;
1608 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1610 if (copy_to_user(value
, &result
, sizeof(int)))
1615 static int edge_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1616 unsigned int set
, unsigned int clear
)
1618 struct usb_serial_port
*port
= tty
->driver_data
;
1619 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1622 dbg("%s - port %d", __func__
, port
->number
);
1624 mcr
= edge_port
->shadowMCR
;
1625 if (set
& TIOCM_RTS
)
1627 if (set
& TIOCM_DTR
)
1629 if (set
& TIOCM_LOOP
)
1630 mcr
|= MCR_LOOPBACK
;
1632 if (clear
& TIOCM_RTS
)
1634 if (clear
& TIOCM_DTR
)
1636 if (clear
& TIOCM_LOOP
)
1637 mcr
&= ~MCR_LOOPBACK
;
1639 edge_port
->shadowMCR
= mcr
;
1641 send_cmd_write_uart_register(edge_port
, MCR
, edge_port
->shadowMCR
);
1646 static int edge_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1648 struct usb_serial_port
*port
= tty
->driver_data
;
1649 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1650 unsigned int result
= 0;
1654 dbg("%s - port %d", __func__
, port
->number
);
1656 msr
= edge_port
->shadowMSR
;
1657 mcr
= edge_port
->shadowMCR
;
1658 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0) /* 0x002 */
1659 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0) /* 0x004 */
1660 | ((msr
& EDGEPORT_MSR_CTS
) ? TIOCM_CTS
: 0) /* 0x020 */
1661 | ((msr
& EDGEPORT_MSR_CD
) ? TIOCM_CAR
: 0) /* 0x040 */
1662 | ((msr
& EDGEPORT_MSR_RI
) ? TIOCM_RI
: 0) /* 0x080 */
1663 | ((msr
& EDGEPORT_MSR_DSR
) ? TIOCM_DSR
: 0); /* 0x100 */
1666 dbg("%s -- %x", __func__
, result
);
1671 static int get_serial_info(struct edgeport_port
*edge_port
,
1672 struct serial_struct __user
*retinfo
)
1674 struct serial_struct tmp
;
1679 memset(&tmp
, 0, sizeof(tmp
));
1681 tmp
.type
= PORT_16550A
;
1682 tmp
.line
= edge_port
->port
->serial
->minor
;
1683 tmp
.port
= edge_port
->port
->number
;
1685 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
1686 tmp
.xmit_fifo_size
= edge_port
->maxTxCredits
;
1687 tmp
.baud_base
= 9600;
1688 tmp
.close_delay
= 5*HZ
;
1689 tmp
.closing_wait
= 30*HZ
;
1691 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1698 /*****************************************************************************
1700 * this function handles any ioctl calls to the driver
1701 *****************************************************************************/
1702 static int edge_ioctl(struct tty_struct
*tty
, struct file
*file
,
1703 unsigned int cmd
, unsigned long arg
)
1705 struct usb_serial_port
*port
= tty
->driver_data
;
1707 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1708 struct async_icount cnow
;
1709 struct async_icount cprev
;
1710 struct serial_icounter_struct icount
;
1712 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
1716 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
1717 return get_lsr_info(edge_port
, (unsigned int __user
*) arg
);
1720 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
1721 return get_serial_info(edge_port
, (struct serial_struct __user
*) arg
);
1724 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
1725 cprev
= edge_port
->icount
;
1727 prepare_to_wait(&edge_port
->delta_msr_wait
,
1728 &wait
, TASK_INTERRUPTIBLE
);
1730 finish_wait(&edge_port
->delta_msr_wait
, &wait
);
1731 /* see if a signal did it */
1732 if (signal_pending(current
))
1733 return -ERESTARTSYS
;
1734 cnow
= edge_port
->icount
;
1735 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
1736 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
1737 return -EIO
; /* no change => error */
1738 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
1739 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
1740 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
1741 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
1750 cnow
= edge_port
->icount
;
1751 memset(&icount
, 0, sizeof(icount
));
1752 icount
.cts
= cnow
.cts
;
1753 icount
.dsr
= cnow
.dsr
;
1754 icount
.rng
= cnow
.rng
;
1755 icount
.dcd
= cnow
.dcd
;
1756 icount
.rx
= cnow
.rx
;
1757 icount
.tx
= cnow
.tx
;
1758 icount
.frame
= cnow
.frame
;
1759 icount
.overrun
= cnow
.overrun
;
1760 icount
.parity
= cnow
.parity
;
1761 icount
.brk
= cnow
.brk
;
1762 icount
.buf_overrun
= cnow
.buf_overrun
;
1764 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1765 __func__
, port
->number
, icount
.rx
, icount
.tx
);
1766 if (copy_to_user((void __user
*)arg
, &icount
, sizeof(icount
)))
1770 return -ENOIOCTLCMD
;
1774 /*****************************************************************************
1776 * this function sends a break to the port
1777 *****************************************************************************/
1778 static void edge_break(struct tty_struct
*tty
, int break_state
)
1780 struct usb_serial_port
*port
= tty
->driver_data
;
1781 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1782 struct edgeport_serial
*edge_serial
= usb_get_serial_data(port
->serial
);
1785 if ((!edge_serial
->is_epic
) ||
1786 ((edge_serial
->is_epic
) &&
1787 (edge_serial
->epic_descriptor
.Supports
.IOSPChase
))) {
1788 /* flush and chase */
1789 edge_port
->chaseResponsePending
= true;
1791 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__
);
1792 status
= send_iosp_ext_cmd(edge_port
, IOSP_CMD_CHASE_PORT
, 0);
1794 /* block until chase finished */
1795 block_until_chase_response(edge_port
);
1797 edge_port
->chaseResponsePending
= false;
1801 if ((!edge_serial
->is_epic
) ||
1802 ((edge_serial
->is_epic
) &&
1803 (edge_serial
->epic_descriptor
.Supports
.IOSPSetClrBreak
))) {
1804 if (break_state
== -1) {
1805 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__
);
1806 status
= send_iosp_ext_cmd(edge_port
,
1807 IOSP_CMD_SET_BREAK
, 0);
1809 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__
);
1810 status
= send_iosp_ext_cmd(edge_port
,
1811 IOSP_CMD_CLEAR_BREAK
, 0);
1814 dbg("%s - error sending break set/clear command.",
1822 /*****************************************************************************
1824 * this function handles the data received on the bulk in pipe.
1825 *****************************************************************************/
1826 static void process_rcvd_data(struct edgeport_serial
*edge_serial
,
1827 unsigned char *buffer
, __u16 bufferLength
)
1829 struct usb_serial_port
*port
;
1830 struct edgeport_port
*edge_port
;
1831 struct tty_struct
*tty
;
1832 __u16 lastBufferLength
;
1835 dbg("%s", __func__
);
1837 lastBufferLength
= bufferLength
+ 1;
1839 while (bufferLength
> 0) {
1840 /* failsafe incase we get a message that we don't understand */
1841 if (lastBufferLength
== bufferLength
) {
1842 dbg("%s - stuck in loop, exiting it.", __func__
);
1845 lastBufferLength
= bufferLength
;
1847 switch (edge_serial
->rxState
) {
1849 edge_serial
->rxHeader1
= *buffer
;
1853 if (bufferLength
== 0) {
1854 edge_serial
->rxState
= EXPECT_HDR2
;
1857 /* otherwise, drop on through */
1859 edge_serial
->rxHeader2
= *buffer
;
1863 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__
,
1864 edge_serial
->rxHeader1
, edge_serial
->rxHeader2
);
1865 /* Process depending on whether this header is
1868 if (IS_CMD_STAT_HDR(edge_serial
->rxHeader1
)) {
1869 /* Decode this status header and go to
1870 * EXPECT_HDR1 (if we can process the status
1871 * with only 2 bytes), or go to EXPECT_HDR3 to
1872 * get the third byte. */
1873 edge_serial
->rxPort
=
1874 IOSP_GET_HDR_PORT(edge_serial
->rxHeader1
);
1875 edge_serial
->rxStatusCode
=
1876 IOSP_GET_STATUS_CODE(
1877 edge_serial
->rxHeader1
);
1879 if (!IOSP_STATUS_IS_2BYTE(
1880 edge_serial
->rxStatusCode
)) {
1881 /* This status needs additional bytes.
1882 * Save what we have and then wait for
1885 edge_serial
->rxStatusParam
1886 = edge_serial
->rxHeader2
;
1887 edge_serial
->rxState
= EXPECT_HDR3
;
1890 /* We have all the header bytes, process the
1892 process_rcvd_status(edge_serial
,
1893 edge_serial
->rxHeader2
, 0);
1894 edge_serial
->rxState
= EXPECT_HDR1
;
1897 edge_serial
->rxPort
=
1898 IOSP_GET_HDR_PORT(edge_serial
->rxHeader1
);
1899 edge_serial
->rxBytesRemaining
=
1900 IOSP_GET_HDR_DATA_LEN(
1901 edge_serial
->rxHeader1
,
1902 edge_serial
->rxHeader2
);
1903 dbg("%s - Data for Port %u Len %u",
1905 edge_serial
->rxPort
,
1906 edge_serial
->rxBytesRemaining
);
1908 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1909 * ASSERT(DevExt->RxBytesRemaining <
1910 * IOSP_MAX_DATA_LENGTH);
1913 if (bufferLength
== 0) {
1914 edge_serial
->rxState
= EXPECT_DATA
;
1917 /* Else, drop through */
1919 case EXPECT_DATA
: /* Expect data */
1920 if (bufferLength
< edge_serial
->rxBytesRemaining
) {
1921 rxLen
= bufferLength
;
1922 /* Expect data to start next buffer */
1923 edge_serial
->rxState
= EXPECT_DATA
;
1925 /* BufLen >= RxBytesRemaining */
1926 rxLen
= edge_serial
->rxBytesRemaining
;
1927 /* Start another header next time */
1928 edge_serial
->rxState
= EXPECT_HDR1
;
1931 bufferLength
-= rxLen
;
1932 edge_serial
->rxBytesRemaining
-= rxLen
;
1934 /* spit this data back into the tty driver if this
1937 port
= edge_serial
->serial
->port
[
1938 edge_serial
->rxPort
];
1939 edge_port
= usb_get_serial_port_data(port
);
1940 if (edge_port
->open
) {
1941 tty
= tty_port_tty_get(
1942 &edge_port
->port
->port
);
1944 dbg("%s - Sending %d bytes to TTY for port %d",
1945 __func__
, rxLen
, edge_serial
->rxPort
);
1946 edge_tty_recv(&edge_serial
->serial
->dev
->dev
, tty
, buffer
, rxLen
);
1949 edge_port
->icount
.rx
+= rxLen
;
1955 case EXPECT_HDR3
: /* Expect 3rd byte of status header */
1956 edge_serial
->rxHeader3
= *buffer
;
1960 /* We have all the header bytes, process the
1962 process_rcvd_status(edge_serial
,
1963 edge_serial
->rxStatusParam
,
1964 edge_serial
->rxHeader3
);
1965 edge_serial
->rxState
= EXPECT_HDR1
;
1972 /*****************************************************************************
1973 * process_rcvd_status
1974 * this function handles the any status messages received on the
1976 *****************************************************************************/
1977 static void process_rcvd_status(struct edgeport_serial
*edge_serial
,
1978 __u8 byte2
, __u8 byte3
)
1980 struct usb_serial_port
*port
;
1981 struct edgeport_port
*edge_port
;
1982 struct tty_struct
*tty
;
1983 __u8 code
= edge_serial
->rxStatusCode
;
1985 /* switch the port pointer to the one being currently talked about */
1986 port
= edge_serial
->serial
->port
[edge_serial
->rxPort
];
1987 edge_port
= usb_get_serial_port_data(port
);
1988 if (edge_port
== NULL
) {
1989 dev_err(&edge_serial
->serial
->dev
->dev
,
1990 "%s - edge_port == NULL for port %d\n",
1991 __func__
, edge_serial
->rxPort
);
1995 dbg("%s - port %d", __func__
, edge_serial
->rxPort
);
1997 if (code
== IOSP_EXT_STATUS
) {
1999 case IOSP_EXT_STATUS_CHASE_RSP
:
2000 /* we want to do EXT status regardless of port
2002 dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
2003 __func__
, edge_serial
->rxPort
, byte3
);
2004 /* Currently, the only EXT_STATUS is Chase, so process
2005 * here instead of one more call to one more subroutine
2006 * If/when more EXT_STATUS, there'll be more work to do
2007 * Also, we currently clear flag and close the port
2008 * regardless of content of above's Byte3.
2009 * We could choose to do something else when Byte3 says
2010 * Timeout on Chase from Edgeport, like wait longer in
2011 * block_until_chase_response, but for now we don't.
2013 edge_port
->chaseResponsePending
= false;
2014 wake_up(&edge_port
->wait_chase
);
2017 case IOSP_EXT_STATUS_RX_CHECK_RSP
:
2018 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__
, edge_serial
->rxPort
, byte3
);
2019 /* Port->RxCheckRsp = true; */
2024 if (code
== IOSP_STATUS_OPEN_RSP
) {
2025 edge_port
->txCredits
= GET_TX_BUFFER_SIZE(byte3
);
2026 edge_port
->maxTxCredits
= edge_port
->txCredits
;
2027 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__
, edge_serial
->rxPort
, byte2
, edge_port
->txCredits
);
2028 handle_new_msr(edge_port
, byte2
);
2030 /* send the current line settings to the port so we are
2031 in sync with any further termios calls */
2032 tty
= tty_port_tty_get(&edge_port
->port
->port
);
2034 change_port_settings(tty
,
2035 edge_port
, tty
->termios
);
2039 /* we have completed the open */
2040 edge_port
->openPending
= false;
2041 edge_port
->open
= true;
2042 wake_up(&edge_port
->wait_open
);
2046 /* If port is closed, silently discard all rcvd status. We can
2047 * have cases where buffered status is received AFTER the close
2048 * port command is sent to the Edgeport.
2050 if (!edge_port
->open
|| edge_port
->closePending
)
2054 /* Not currently sent by Edgeport */
2055 case IOSP_STATUS_LSR
:
2056 dbg("%s - Port %u LSR Status = %02x",
2057 __func__
, edge_serial
->rxPort
, byte2
);
2058 handle_new_lsr(edge_port
, false, byte2
, 0);
2061 case IOSP_STATUS_LSR_DATA
:
2062 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2063 __func__
, edge_serial
->rxPort
, byte2
, byte3
);
2064 /* byte2 is LSR Register */
2065 /* byte3 is broken data byte */
2066 handle_new_lsr(edge_port
, true, byte2
, byte3
);
2069 * case IOSP_EXT_4_STATUS:
2070 * dbg("%s - Port %u LSR Status = %02x Data = %02x",
2071 * __func__, edge_serial->rxPort, byte2, byte3);
2074 case IOSP_STATUS_MSR
:
2075 dbg("%s - Port %u MSR Status = %02x",
2076 __func__
, edge_serial
->rxPort
, byte2
);
2078 * Process this new modem status and generate appropriate
2079 * events, etc, based on the new status. This routine
2080 * also saves the MSR in Port->ShadowMsr.
2082 handle_new_msr(edge_port
, byte2
);
2086 dbg("%s - Unrecognized IOSP status code %u\n", __func__
, code
);
2093 /*****************************************************************************
2095 * this function passes data on to the tty flip buffer
2096 *****************************************************************************/
2097 static void edge_tty_recv(struct device
*dev
, struct tty_struct
*tty
,
2098 unsigned char *data
, int length
)
2103 cnt
= tty_buffer_request_room(tty
, length
);
2105 dev_err(dev
, "%s - dropping data, %d bytes lost\n",
2106 __func__
, length
- cnt
);
2110 tty_insert_flip_string(tty
, data
, cnt
);
2113 } while (length
> 0);
2115 tty_flip_buffer_push(tty
);
2119 /*****************************************************************************
2121 * this function handles any change to the msr register for a port.
2122 *****************************************************************************/
2123 static void handle_new_msr(struct edgeport_port
*edge_port
, __u8 newMsr
)
2125 struct async_icount
*icount
;
2127 dbg("%s %02x", __func__
, newMsr
);
2129 if (newMsr
& (EDGEPORT_MSR_DELTA_CTS
| EDGEPORT_MSR_DELTA_DSR
|
2130 EDGEPORT_MSR_DELTA_RI
| EDGEPORT_MSR_DELTA_CD
)) {
2131 icount
= &edge_port
->icount
;
2133 /* update input line counters */
2134 if (newMsr
& EDGEPORT_MSR_DELTA_CTS
)
2136 if (newMsr
& EDGEPORT_MSR_DELTA_DSR
)
2138 if (newMsr
& EDGEPORT_MSR_DELTA_CD
)
2140 if (newMsr
& EDGEPORT_MSR_DELTA_RI
)
2142 wake_up_interruptible(&edge_port
->delta_msr_wait
);
2145 /* Save the new modem status */
2146 edge_port
->shadowMSR
= newMsr
& 0xf0;
2152 /*****************************************************************************
2154 * this function handles any change to the lsr register for a port.
2155 *****************************************************************************/
2156 static void handle_new_lsr(struct edgeport_port
*edge_port
, __u8 lsrData
,
2157 __u8 lsr
, __u8 data
)
2159 __u8 newLsr
= (__u8
) (lsr
& (__u8
)
2160 (LSR_OVER_ERR
| LSR_PAR_ERR
| LSR_FRM_ERR
| LSR_BREAK
));
2161 struct async_icount
*icount
;
2163 dbg("%s - %02x", __func__
, newLsr
);
2165 edge_port
->shadowLSR
= lsr
;
2167 if (newLsr
& LSR_BREAK
) {
2169 * Parity and Framing errors only count if they
2170 * occur exclusive of a break being
2173 newLsr
&= (__u8
)(LSR_OVER_ERR
| LSR_BREAK
);
2176 /* Place LSR data byte into Rx buffer */
2178 struct tty_struct
*tty
=
2179 tty_port_tty_get(&edge_port
->port
->port
);
2181 edge_tty_recv(&edge_port
->port
->dev
, tty
, &data
, 1);
2185 /* update input line counters */
2186 icount
= &edge_port
->icount
;
2187 if (newLsr
& LSR_BREAK
)
2189 if (newLsr
& LSR_OVER_ERR
)
2191 if (newLsr
& LSR_PAR_ERR
)
2193 if (newLsr
& LSR_FRM_ERR
)
2200 /****************************************************************************
2202 * writes a number of bytes to the Edgeport device's sram starting at the
2204 * If successful returns the number of bytes written, otherwise it returns
2205 * a negative error number of the problem.
2206 ****************************************************************************/
2207 static int sram_write(struct usb_serial
*serial
, __u16 extAddr
, __u16 addr
,
2208 __u16 length
, const __u8
*data
)
2211 __u16 current_length
;
2212 unsigned char *transfer_buffer
;
2214 dbg("%s - %x, %x, %d", __func__
, extAddr
, addr
, length
);
2216 transfer_buffer
= kmalloc(64, GFP_KERNEL
);
2217 if (!transfer_buffer
) {
2218 dev_err(&serial
->dev
->dev
, "%s - kmalloc(%d) failed.\n",
2223 /* need to split these writes up into 64 byte chunks */
2225 while (length
> 0) {
2227 current_length
= 64;
2229 current_length
= length
;
2231 /* dbg("%s - writing %x, %x, %d", __func__,
2232 extAddr, addr, current_length); */
2233 memcpy(transfer_buffer
, data
, current_length
);
2234 result
= usb_control_msg(serial
->dev
,
2235 usb_sndctrlpipe(serial
->dev
, 0),
2236 USB_REQUEST_ION_WRITE_RAM
,
2237 0x40, addr
, extAddr
, transfer_buffer
,
2238 current_length
, 300);
2241 length
-= current_length
;
2242 addr
+= current_length
;
2243 data
+= current_length
;
2246 kfree(transfer_buffer
);
2251 /****************************************************************************
2253 * writes a number of bytes to the Edgeport device's ROM starting at the
2255 * If successful returns the number of bytes written, otherwise it returns
2256 * a negative error number of the problem.
2257 ****************************************************************************/
2258 static int rom_write(struct usb_serial
*serial
, __u16 extAddr
, __u16 addr
,
2259 __u16 length
, const __u8
*data
)
2262 __u16 current_length
;
2263 unsigned char *transfer_buffer
;
2265 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2267 transfer_buffer
= kmalloc(64, GFP_KERNEL
);
2268 if (!transfer_buffer
) {
2269 dev_err(&serial
->dev
->dev
, "%s - kmalloc(%d) failed.\n",
2274 /* need to split these writes up into 64 byte chunks */
2276 while (length
> 0) {
2278 current_length
= 64;
2280 current_length
= length
;
2281 /* dbg("%s - writing %x, %x, %d", __func__,
2282 extAddr, addr, current_length); */
2283 memcpy(transfer_buffer
, data
, current_length
);
2284 result
= usb_control_msg(serial
->dev
,
2285 usb_sndctrlpipe(serial
->dev
, 0),
2286 USB_REQUEST_ION_WRITE_ROM
, 0x40,
2288 transfer_buffer
, current_length
, 300);
2291 length
-= current_length
;
2292 addr
+= current_length
;
2293 data
+= current_length
;
2296 kfree(transfer_buffer
);
2301 /****************************************************************************
2303 * reads a number of bytes from the Edgeport device starting at the given
2305 * If successful returns the number of bytes read, otherwise it returns
2306 * a negative error number of the problem.
2307 ****************************************************************************/
2308 static int rom_read(struct usb_serial
*serial
, __u16 extAddr
,
2309 __u16 addr
, __u16 length
, __u8
*data
)
2312 __u16 current_length
;
2313 unsigned char *transfer_buffer
;
2315 dbg("%s - %x, %x, %d", __func__
, extAddr
, addr
, length
);
2317 transfer_buffer
= kmalloc(64, GFP_KERNEL
);
2318 if (!transfer_buffer
) {
2319 dev_err(&serial
->dev
->dev
,
2320 "%s - kmalloc(%d) failed.\n", __func__
, 64);
2324 /* need to split these reads up into 64 byte chunks */
2326 while (length
> 0) {
2328 current_length
= 64;
2330 current_length
= length
;
2331 /* dbg("%s - %x, %x, %d", __func__,
2332 extAddr, addr, current_length); */
2333 result
= usb_control_msg(serial
->dev
,
2334 usb_rcvctrlpipe(serial
->dev
, 0),
2335 USB_REQUEST_ION_READ_ROM
,
2336 0xC0, addr
, extAddr
, transfer_buffer
,
2337 current_length
, 300);
2340 memcpy(data
, transfer_buffer
, current_length
);
2341 length
-= current_length
;
2342 addr
+= current_length
;
2343 data
+= current_length
;
2346 kfree(transfer_buffer
);
2351 /****************************************************************************
2353 * Is used to send a IOSP message to the Edgeport device
2354 ****************************************************************************/
2355 static int send_iosp_ext_cmd(struct edgeport_port
*edge_port
,
2356 __u8 command
, __u8 param
)
2358 unsigned char *buffer
;
2359 unsigned char *currentCommand
;
2363 dbg("%s - %d, %d", __func__
, command
, param
);
2365 buffer
= kmalloc(10, GFP_ATOMIC
);
2367 dev_err(&edge_port
->port
->dev
,
2368 "%s - kmalloc(%d) failed.\n", __func__
, 10);
2372 currentCommand
= buffer
;
2374 MAKE_CMD_EXT_CMD(¤tCommand
, &length
,
2375 edge_port
->port
->number
- edge_port
->port
->serial
->minor
,
2378 status
= write_cmd_usb(edge_port
, buffer
, length
);
2380 /* something bad happened, let's free up the memory */
2388 /*****************************************************************************
2390 * this function writes the given buffer out to the bulk write endpoint.
2391 *****************************************************************************/
2392 static int write_cmd_usb(struct edgeport_port
*edge_port
,
2393 unsigned char *buffer
, int length
)
2395 struct edgeport_serial
*edge_serial
=
2396 usb_get_serial_data(edge_port
->port
->serial
);
2401 usb_serial_debug_data(debug
, &edge_port
->port
->dev
,
2402 __func__
, length
, buffer
);
2404 /* Allocate our next urb */
2405 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
2409 atomic_inc(&CmdUrbs
);
2410 dbg("%s - ALLOCATE URB %p (outstanding %d)",
2411 __func__
, urb
, atomic_read(&CmdUrbs
));
2413 usb_fill_bulk_urb(urb
, edge_serial
->serial
->dev
,
2414 usb_sndbulkpipe(edge_serial
->serial
->dev
,
2415 edge_serial
->bulk_out_endpoint
),
2416 buffer
, length
, edge_bulk_out_cmd_callback
, edge_port
);
2418 edge_port
->commandPending
= true;
2419 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
2422 /* something went wrong */
2423 dev_err(&edge_port
->port
->dev
,
2424 "%s - usb_submit_urb(write command) failed, status = %d\n",
2428 atomic_dec(&CmdUrbs
);
2432 /* wait for command to finish */
2433 timeout
= COMMAND_TIMEOUT
;
2435 wait_event(&edge_port
->wait_command
, !edge_port
->commandPending
);
2437 if (edge_port
->commandPending
) {
2438 /* command timed out */
2439 dbg("%s - command timed out", __func__
);
2447 /*****************************************************************************
2448 * send_cmd_write_baud_rate
2449 * this function sends the proper command to change the baud rate of the
2451 *****************************************************************************/
2452 static int send_cmd_write_baud_rate(struct edgeport_port
*edge_port
,
2455 struct edgeport_serial
*edge_serial
=
2456 usb_get_serial_data(edge_port
->port
->serial
);
2457 unsigned char *cmdBuffer
;
2458 unsigned char *currCmd
;
2462 unsigned char number
=
2463 edge_port
->port
->number
- edge_port
->port
->serial
->minor
;
2465 if (edge_serial
->is_epic
&&
2466 !edge_serial
->epic_descriptor
.Supports
.IOSPSetBaudRate
) {
2467 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2468 edge_port
->port
->number
, baudRate
);
2472 dbg("%s - port = %d, baud = %d", __func__
,
2473 edge_port
->port
->number
, baudRate
);
2475 status
= calc_baud_rate_divisor(baudRate
, &divisor
);
2477 dev_err(&edge_port
->port
->dev
, "%s - bad baud rate\n",
2482 /* Alloc memory for the string of commands. */
2483 cmdBuffer
= kmalloc(0x100, GFP_ATOMIC
);
2485 dev_err(&edge_port
->port
->dev
,
2486 "%s - kmalloc(%d) failed.\n", __func__
, 0x100);
2489 currCmd
= cmdBuffer
;
2491 /* Enable access to divisor latch */
2492 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, LCR
, LCR_DL_ENABLE
);
2494 /* Write the divisor itself */
2495 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, DLL
, LOW8(divisor
));
2496 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, DLM
, HIGH8(divisor
));
2498 /* Restore original value to disable access to divisor latch */
2499 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, LCR
,
2500 edge_port
->shadowLCR
);
2502 status
= write_cmd_usb(edge_port
, cmdBuffer
, cmdLen
);
2504 /* something bad happened, let's free up the memory */
2512 /*****************************************************************************
2513 * calc_baud_rate_divisor
2514 * this function calculates the proper baud rate divisor for the specified
2516 *****************************************************************************/
2517 static int calc_baud_rate_divisor(int baudrate
, int *divisor
)
2523 dbg("%s - %d", __func__
, baudrate
);
2525 for (i
= 0; i
< ARRAY_SIZE(divisor_table
); i
++) {
2526 if (divisor_table
[i
].BaudRate
== baudrate
) {
2527 *divisor
= divisor_table
[i
].Divisor
;
2532 /* We have tried all of the standard baud rates
2533 * lets try to calculate the divisor for this baud rate
2534 * Make sure the baud rate is reasonable */
2535 if (baudrate
> 50 && baudrate
< 230400) {
2537 custom
= (__u16
)((230400L + baudrate
/2) / baudrate
);
2541 dbg("%s - Baud %d = %d\n", __func__
, baudrate
, custom
);
2549 /*****************************************************************************
2550 * send_cmd_write_uart_register
2551 * this function builds up a uart register message and sends to to the device.
2552 *****************************************************************************/
2553 static int send_cmd_write_uart_register(struct edgeport_port
*edge_port
,
2554 __u8 regNum
, __u8 regValue
)
2556 struct edgeport_serial
*edge_serial
=
2557 usb_get_serial_data(edge_port
->port
->serial
);
2558 unsigned char *cmdBuffer
;
2559 unsigned char *currCmd
;
2560 unsigned long cmdLen
= 0;
2563 dbg("%s - write to %s register 0x%02x",
2564 (regNum
== MCR
) ? "MCR" : "LCR", __func__
, regValue
);
2566 if (edge_serial
->is_epic
&&
2567 !edge_serial
->epic_descriptor
.Supports
.IOSPWriteMCR
&&
2569 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2573 if (edge_serial
->is_epic
&&
2574 !edge_serial
->epic_descriptor
.Supports
.IOSPWriteLCR
&&
2576 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2580 /* Alloc memory for the string of commands. */
2581 cmdBuffer
= kmalloc(0x10, GFP_ATOMIC
);
2582 if (cmdBuffer
== NULL
)
2585 currCmd
= cmdBuffer
;
2587 /* Build a cmd in the buffer to write the given register */
2588 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
,
2589 edge_port
->port
->number
- edge_port
->port
->serial
->minor
,
2592 status
= write_cmd_usb(edge_port
, cmdBuffer
, cmdLen
);
2594 /* something bad happened, let's free up the memory */
2602 /*****************************************************************************
2603 * change_port_settings
2604 * This routine is called to set the UART on the device to match the
2605 * specified new settings.
2606 *****************************************************************************/
2608 static void change_port_settings(struct tty_struct
*tty
,
2609 struct edgeport_port
*edge_port
, struct ktermios
*old_termios
)
2611 struct edgeport_serial
*edge_serial
=
2612 usb_get_serial_data(edge_port
->port
->serial
);
2623 dbg("%s - port %d", __func__
, edge_port
->port
->number
);
2625 if (!edge_port
->open
&&
2626 !edge_port
->openPending
) {
2627 dbg("%s - port not opened", __func__
);
2631 cflag
= tty
->termios
->c_cflag
;
2633 switch (cflag
& CSIZE
) {
2635 lData
= LCR_BITS_5
; mask
= 0x1f;
2636 dbg("%s - data bits = 5", __func__
);
2639 lData
= LCR_BITS_6
; mask
= 0x3f;
2640 dbg("%s - data bits = 6", __func__
);
2643 lData
= LCR_BITS_7
; mask
= 0x7f;
2644 dbg("%s - data bits = 7", __func__
);
2649 dbg("%s - data bits = 8", __func__
);
2653 lParity
= LCR_PAR_NONE
;
2654 if (cflag
& PARENB
) {
2655 if (cflag
& CMSPAR
) {
2656 if (cflag
& PARODD
) {
2657 lParity
= LCR_PAR_MARK
;
2658 dbg("%s - parity = mark", __func__
);
2660 lParity
= LCR_PAR_SPACE
;
2661 dbg("%s - parity = space", __func__
);
2663 } else if (cflag
& PARODD
) {
2664 lParity
= LCR_PAR_ODD
;
2665 dbg("%s - parity = odd", __func__
);
2667 lParity
= LCR_PAR_EVEN
;
2668 dbg("%s - parity = even", __func__
);
2671 dbg("%s - parity = none", __func__
);
2674 if (cflag
& CSTOPB
) {
2676 dbg("%s - stop bits = 2", __func__
);
2679 dbg("%s - stop bits = 1", __func__
);
2682 /* figure out the flow control settings */
2683 rxFlow
= txFlow
= 0x00;
2684 if (cflag
& CRTSCTS
) {
2685 rxFlow
|= IOSP_RX_FLOW_RTS
;
2686 txFlow
|= IOSP_TX_FLOW_CTS
;
2687 dbg("%s - RTS/CTS is enabled", __func__
);
2689 dbg("%s - RTS/CTS is disabled", __func__
);
2692 /* if we are implementing XON/XOFF, set the start and stop character
2694 if (I_IXOFF(tty
) || I_IXON(tty
)) {
2695 unsigned char stop_char
= STOP_CHAR(tty
);
2696 unsigned char start_char
= START_CHAR(tty
);
2698 if ((!edge_serial
->is_epic
) ||
2699 ((edge_serial
->is_epic
) &&
2700 (edge_serial
->epic_descriptor
.Supports
.IOSPSetXChar
))) {
2701 send_iosp_ext_cmd(edge_port
,
2702 IOSP_CMD_SET_XON_CHAR
, start_char
);
2703 send_iosp_ext_cmd(edge_port
,
2704 IOSP_CMD_SET_XOFF_CHAR
, stop_char
);
2707 /* if we are implementing INBOUND XON/XOFF */
2709 rxFlow
|= IOSP_RX_FLOW_XON_XOFF
;
2710 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2711 __func__
, start_char
, stop_char
);
2713 dbg("%s - INBOUND XON/XOFF is disabled", __func__
);
2716 /* if we are implementing OUTBOUND XON/XOFF */
2718 txFlow
|= IOSP_TX_FLOW_XON_XOFF
;
2719 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2720 __func__
, start_char
, stop_char
);
2722 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__
);
2726 /* Set flow control to the configured value */
2727 if ((!edge_serial
->is_epic
) ||
2728 ((edge_serial
->is_epic
) &&
2729 (edge_serial
->epic_descriptor
.Supports
.IOSPSetRxFlow
)))
2730 send_iosp_ext_cmd(edge_port
, IOSP_CMD_SET_RX_FLOW
, rxFlow
);
2731 if ((!edge_serial
->is_epic
) ||
2732 ((edge_serial
->is_epic
) &&
2733 (edge_serial
->epic_descriptor
.Supports
.IOSPSetTxFlow
)))
2734 send_iosp_ext_cmd(edge_port
, IOSP_CMD_SET_TX_FLOW
, txFlow
);
2737 edge_port
->shadowLCR
&= ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
2738 edge_port
->shadowLCR
|= (lData
| lParity
| lStop
);
2740 edge_port
->validDataMask
= mask
;
2742 /* Send the updated LCR value to the EdgePort */
2743 status
= send_cmd_write_uart_register(edge_port
, LCR
,
2744 edge_port
->shadowLCR
);
2748 /* set up the MCR register and send it to the EdgePort */
2749 edge_port
->shadowMCR
= MCR_MASTER_IE
;
2751 edge_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2753 status
= send_cmd_write_uart_register(edge_port
, MCR
,
2754 edge_port
->shadowMCR
);
2758 /* Determine divisor based on baud rate */
2759 baud
= tty_get_baud_rate(tty
);
2761 /* pick a default, any default... */
2765 dbg("%s - baud rate = %d", __func__
, baud
);
2766 status
= send_cmd_write_baud_rate(edge_port
, baud
);
2768 /* Speed change was not possible - put back the old speed */
2769 baud
= tty_termios_baud_rate(old_termios
);
2770 tty_encode_baud_rate(tty
, baud
, baud
);
2776 /****************************************************************************
2778 * Turns a string from Unicode into ASCII.
2779 * Doesn't do a good job with any characters that are outside the normal
2780 * ASCII range, but it's only for debugging...
2781 * NOTE: expects the unicode in LE format
2782 ****************************************************************************/
2783 static void unicode_to_ascii(char *string
, int buflen
,
2784 __le16
*unicode
, int unicode_size
)
2788 if (buflen
<= 0) /* never happens, but... */
2790 --buflen
; /* space for nul */
2792 for (i
= 0; i
< unicode_size
; i
++) {
2795 string
[i
] = (char)(le16_to_cpu(unicode
[i
]));
2801 /****************************************************************************
2802 * get_manufacturing_desc
2803 * reads in the manufacturing descriptor and stores it into the serial
2805 ****************************************************************************/
2806 static void get_manufacturing_desc(struct edgeport_serial
*edge_serial
)
2810 dbg("getting manufacturer descriptor");
2812 response
= rom_read(edge_serial
->serial
,
2813 (EDGE_MANUF_DESC_ADDR
& 0xffff0000) >> 16,
2814 (__u16
)(EDGE_MANUF_DESC_ADDR
& 0x0000ffff),
2815 EDGE_MANUF_DESC_LEN
,
2816 (__u8
*)(&edge_serial
->manuf_descriptor
));
2819 dev_err(&edge_serial
->serial
->dev
->dev
,
2820 "error in getting manufacturer descriptor\n");
2823 dbg("**Manufacturer Descriptor");
2824 dbg(" RomSize: %dK",
2825 edge_serial
->manuf_descriptor
.RomSize
);
2826 dbg(" RamSize: %dK",
2827 edge_serial
->manuf_descriptor
.RamSize
);
2829 edge_serial
->manuf_descriptor
.CpuRev
);
2830 dbg(" BoardRev: %d",
2831 edge_serial
->manuf_descriptor
.BoardRev
);
2832 dbg(" NumPorts: %d",
2833 edge_serial
->manuf_descriptor
.NumPorts
);
2834 dbg(" DescDate: %d/%d/%d",
2835 edge_serial
->manuf_descriptor
.DescDate
[0],
2836 edge_serial
->manuf_descriptor
.DescDate
[1],
2837 edge_serial
->manuf_descriptor
.DescDate
[2]+1900);
2838 unicode_to_ascii(string
, sizeof(string
),
2839 edge_serial
->manuf_descriptor
.SerialNumber
,
2840 edge_serial
->manuf_descriptor
.SerNumLength
/2);
2841 dbg(" SerialNumber: %s", string
);
2842 unicode_to_ascii(string
, sizeof(string
),
2843 edge_serial
->manuf_descriptor
.AssemblyNumber
,
2844 edge_serial
->manuf_descriptor
.AssemblyNumLength
/2);
2845 dbg(" AssemblyNumber: %s", string
);
2846 unicode_to_ascii(string
, sizeof(string
),
2847 edge_serial
->manuf_descriptor
.OemAssyNumber
,
2848 edge_serial
->manuf_descriptor
.OemAssyNumLength
/2);
2849 dbg(" OemAssyNumber: %s", string
);
2850 dbg(" UartType: %d",
2851 edge_serial
->manuf_descriptor
.UartType
);
2853 edge_serial
->manuf_descriptor
.IonPid
);
2854 dbg(" IonConfig: %d",
2855 edge_serial
->manuf_descriptor
.IonConfig
);
2860 /****************************************************************************
2862 * reads in the bootloader descriptor and stores it into the serial
2864 ****************************************************************************/
2865 static void get_boot_desc(struct edgeport_serial
*edge_serial
)
2869 dbg("getting boot descriptor");
2871 response
= rom_read(edge_serial
->serial
,
2872 (EDGE_BOOT_DESC_ADDR
& 0xffff0000) >> 16,
2873 (__u16
)(EDGE_BOOT_DESC_ADDR
& 0x0000ffff),
2875 (__u8
*)(&edge_serial
->boot_descriptor
));
2878 dev_err(&edge_serial
->serial
->dev
->dev
,
2879 "error in getting boot descriptor\n");
2881 dbg("**Boot Descriptor:");
2882 dbg(" BootCodeLength: %d",
2883 le16_to_cpu(edge_serial
->boot_descriptor
.BootCodeLength
));
2884 dbg(" MajorVersion: %d",
2885 edge_serial
->boot_descriptor
.MajorVersion
);
2886 dbg(" MinorVersion: %d",
2887 edge_serial
->boot_descriptor
.MinorVersion
);
2888 dbg(" BuildNumber: %d",
2889 le16_to_cpu(edge_serial
->boot_descriptor
.BuildNumber
));
2890 dbg(" Capabilities: 0x%x",
2891 le16_to_cpu(edge_serial
->boot_descriptor
.Capabilities
));
2892 dbg(" UConfig0: %d",
2893 edge_serial
->boot_descriptor
.UConfig0
);
2894 dbg(" UConfig1: %d",
2895 edge_serial
->boot_descriptor
.UConfig1
);
2900 /****************************************************************************
2901 * load_application_firmware
2902 * This is called to load the application firmware to the device
2903 ****************************************************************************/
2904 static void load_application_firmware(struct edgeport_serial
*edge_serial
)
2906 const struct ihex_binrec
*rec
;
2907 const struct firmware
*fw
;
2908 const char *fw_name
;
2909 const char *fw_info
;
2914 switch (edge_serial
->product_info
.iDownloadFile
) {
2915 case EDGE_DOWNLOAD_FILE_I930
:
2916 fw_info
= "downloading firmware version (930)";
2917 fw_name
= "edgeport/down.fw";
2920 case EDGE_DOWNLOAD_FILE_80251
:
2921 fw_info
= "downloading firmware version (80251)";
2922 fw_name
= "edgeport/down2.fw";
2925 case EDGE_DOWNLOAD_FILE_NONE
:
2926 dbg ("No download file specified, skipping download\n");
2933 response
= request_ihex_firmware(&fw
, fw_name
,
2934 &edge_serial
->serial
->dev
->dev
);
2936 printk(KERN_ERR
"Failed to load image \"%s\" err %d\n",
2941 rec
= (const struct ihex_binrec
*)fw
->data
;
2942 build
= (rec
->data
[2] << 8) | rec
->data
[3];
2944 dbg("%s %d.%d.%d", fw_info
, rec
->data
[0], rec
->data
[1], build
);
2946 edge_serial
->product_info
.FirmwareMajorVersion
= fw
->data
[0];
2947 edge_serial
->product_info
.FirmwareMinorVersion
= fw
->data
[1];
2948 edge_serial
->product_info
.FirmwareBuildNumber
= cpu_to_le16(build
);
2950 for (rec
= ihex_next_binrec(rec
); rec
;
2951 rec
= ihex_next_binrec(rec
)) {
2952 Operaddr
= be32_to_cpu(rec
->addr
);
2953 response
= sram_write(edge_serial
->serial
,
2956 be16_to_cpu(rec
->len
),
2959 dev_err(&edge_serial
->serial
->dev
->dev
,
2960 "sram_write failed (%x, %x, %d)\n",
2961 Operaddr
>> 16, Operaddr
& 0xFFFF,
2962 be16_to_cpu(rec
->len
));
2967 dbg("sending exec_dl_code");
2968 response
= usb_control_msg (edge_serial
->serial
->dev
,
2969 usb_sndctrlpipe(edge_serial
->serial
->dev
, 0),
2970 USB_REQUEST_ION_EXEC_DL_CODE
,
2971 0x40, 0x4000, 0x0001, NULL
, 0, 3000);
2973 release_firmware(fw
);
2978 /****************************************************************************
2980 ****************************************************************************/
2981 static int edge_startup(struct usb_serial
*serial
)
2983 struct edgeport_serial
*edge_serial
;
2984 struct edgeport_port
*edge_port
;
2985 struct usb_device
*dev
;
2988 bool interrupt_in_found
;
2990 bool bulk_out_found
;
2991 static __u32 descriptor
[3] = { EDGE_COMPATIBILITY_MASK0
,
2992 EDGE_COMPATIBILITY_MASK1
,
2993 EDGE_COMPATIBILITY_MASK2
};
2997 /* create our private serial structure */
2998 edge_serial
= kzalloc(sizeof(struct edgeport_serial
), GFP_KERNEL
);
2999 if (edge_serial
== NULL
) {
3000 dev_err(&serial
->dev
->dev
, "%s - Out of memory\n", __func__
);
3003 spin_lock_init(&edge_serial
->es_lock
);
3004 edge_serial
->serial
= serial
;
3005 usb_set_serial_data(serial
, edge_serial
);
3007 /* get the name for the device from the device */
3008 i
= get_string(dev
, dev
->descriptor
.iManufacturer
,
3009 &edge_serial
->name
[0], MAX_NAME_LEN
+1);
3010 edge_serial
->name
[i
++] = ' ';
3011 get_string(dev
, dev
->descriptor
.iProduct
,
3012 &edge_serial
->name
[i
], MAX_NAME_LEN
+2 - i
);
3014 dev_info(&serial
->dev
->dev
, "%s detected\n", edge_serial
->name
);
3016 /* Read the epic descriptor */
3017 if (get_epic_descriptor(edge_serial
) <= 0) {
3018 /* memcpy descriptor to Supports structures */
3019 memcpy(&edge_serial
->epic_descriptor
.Supports
, descriptor
,
3020 sizeof(struct edge_compatibility_bits
));
3022 /* get the manufacturing descriptor for this device */
3023 get_manufacturing_desc(edge_serial
);
3025 /* get the boot descriptor */
3026 get_boot_desc(edge_serial
);
3028 get_product_info(edge_serial
);
3031 /* set the number of ports from the manufacturing description */
3032 /* serial->num_ports = serial->product_info.NumPorts; */
3033 if ((!edge_serial
->is_epic
) &&
3034 (edge_serial
->product_info
.NumPorts
!= serial
->num_ports
)) {
3035 dev_warn(&serial
->dev
->dev
, "Device Reported %d serial ports "
3036 "vs. core thinking we have %d ports, email "
3037 "greg@kroah.com this information.\n",
3038 edge_serial
->product_info
.NumPorts
,
3042 dbg("%s - time 1 %ld", __func__
, jiffies
);
3044 /* If not an EPiC device */
3045 if (!edge_serial
->is_epic
) {
3046 /* now load the application firmware into this device */
3047 load_application_firmware(edge_serial
);
3049 dbg("%s - time 2 %ld", __func__
, jiffies
);
3051 /* Check current Edgeport EEPROM and update if necessary */
3052 update_edgeport_E2PROM(edge_serial
);
3054 dbg("%s - time 3 %ld", __func__
, jiffies
);
3056 /* set the configuration to use #1 */
3057 /* dbg("set_configuration 1"); */
3058 /* usb_set_configuration (dev, 1); */
3060 dbg(" FirmwareMajorVersion %d.%d.%d",
3061 edge_serial
->product_info
.FirmwareMajorVersion
,
3062 edge_serial
->product_info
.FirmwareMinorVersion
,
3063 le16_to_cpu(edge_serial
->product_info
.FirmwareBuildNumber
));
3065 /* we set up the pointers to the endpoints in the edge_open function,
3066 * as the structures aren't created yet. */
3068 /* set up our port private structures */
3069 for (i
= 0; i
< serial
->num_ports
; ++i
) {
3070 edge_port
= kmalloc(sizeof(struct edgeport_port
), GFP_KERNEL
);
3071 if (edge_port
== NULL
) {
3072 dev_err(&serial
->dev
->dev
, "%s - Out of memory\n",
3074 for (j
= 0; j
< i
; ++j
) {
3075 kfree(usb_get_serial_port_data(serial
->port
[j
]));
3076 usb_set_serial_port_data(serial
->port
[j
],
3079 usb_set_serial_data(serial
, NULL
);
3083 memset(edge_port
, 0, sizeof(struct edgeport_port
));
3084 spin_lock_init(&edge_port
->ep_lock
);
3085 edge_port
->port
= serial
->port
[i
];
3086 usb_set_serial_port_data(serial
->port
[i
], edge_port
);
3091 if (edge_serial
->is_epic
) {
3092 /* EPIC thing, set up our interrupt polling now and our read
3093 * urb, so that the device knows it really is connected. */
3094 interrupt_in_found
= bulk_in_found
= bulk_out_found
= false;
3095 for (i
= 0; i
< serial
->interface
->altsetting
[0]
3096 .desc
.bNumEndpoints
; ++i
) {
3097 struct usb_endpoint_descriptor
*endpoint
;
3100 endpoint
= &serial
->interface
->altsetting
[0].
3102 buffer_size
= le16_to_cpu(endpoint
->wMaxPacketSize
);
3103 if (!interrupt_in_found
&&
3104 (usb_endpoint_is_int_in(endpoint
))) {
3105 /* we found a interrupt in endpoint */
3106 dbg("found interrupt in");
3108 /* not set up yet, so do it now */
3109 edge_serial
->interrupt_read_urb
=
3110 usb_alloc_urb(0, GFP_KERNEL
);
3111 if (!edge_serial
->interrupt_read_urb
) {
3112 err("out of memory");
3115 edge_serial
->interrupt_in_buffer
=
3116 kmalloc(buffer_size
, GFP_KERNEL
);
3117 if (!edge_serial
->interrupt_in_buffer
) {
3118 err("out of memory");
3119 usb_free_urb(edge_serial
->interrupt_read_urb
);
3122 edge_serial
->interrupt_in_endpoint
=
3123 endpoint
->bEndpointAddress
;
3125 /* set up our interrupt urb */
3127 edge_serial
->interrupt_read_urb
,
3130 endpoint
->bEndpointAddress
),
3131 edge_serial
->interrupt_in_buffer
,
3133 edge_interrupt_callback
,
3135 endpoint
->bInterval
);
3137 interrupt_in_found
= true;
3140 if (!bulk_in_found
&&
3141 (usb_endpoint_is_bulk_in(endpoint
))) {
3142 /* we found a bulk in endpoint */
3143 dbg("found bulk in");
3145 /* not set up yet, so do it now */
3146 edge_serial
->read_urb
=
3147 usb_alloc_urb(0, GFP_KERNEL
);
3148 if (!edge_serial
->read_urb
) {
3149 err("out of memory");
3152 edge_serial
->bulk_in_buffer
=
3153 kmalloc(buffer_size
, GFP_KERNEL
);
3154 if (!edge_serial
->bulk_in_buffer
) {
3155 err("out of memory");
3156 usb_free_urb(edge_serial
->read_urb
);
3159 edge_serial
->bulk_in_endpoint
=
3160 endpoint
->bEndpointAddress
;
3162 /* set up our bulk in urb */
3163 usb_fill_bulk_urb(edge_serial
->read_urb
, dev
,
3164 usb_rcvbulkpipe(dev
,
3165 endpoint
->bEndpointAddress
),
3166 edge_serial
->bulk_in_buffer
,
3167 le16_to_cpu(endpoint
->wMaxPacketSize
),
3168 edge_bulk_in_callback
,
3170 bulk_in_found
= true;
3173 if (!bulk_out_found
&&
3174 (usb_endpoint_is_bulk_out(endpoint
))) {
3175 /* we found a bulk out endpoint */
3176 dbg("found bulk out");
3177 edge_serial
->bulk_out_endpoint
=
3178 endpoint
->bEndpointAddress
;
3179 bulk_out_found
= true;
3183 if (!interrupt_in_found
|| !bulk_in_found
|| !bulk_out_found
) {
3184 err("Error - the proper endpoints were not found!");
3188 /* start interrupt read for this edgeport this interrupt will
3189 * continue as long as the edgeport is connected */
3190 response
= usb_submit_urb(edge_serial
->interrupt_read_urb
,
3193 err("%s - Error %d submitting control urb",
3194 __func__
, response
);
3200 /****************************************************************************
3202 * This function is called whenever the device is removed from the usb bus.
3203 ****************************************************************************/
3204 static void edge_shutdown(struct usb_serial
*serial
)
3206 struct edgeport_serial
*edge_serial
= usb_get_serial_data(serial
);
3209 dbg("%s", __func__
);
3211 /* stop reads and writes on all ports */
3212 for (i
= 0; i
< serial
->num_ports
; ++i
) {
3213 kfree(usb_get_serial_port_data(serial
->port
[i
]));
3214 usb_set_serial_port_data(serial
->port
[i
], NULL
);
3216 /* free up our endpoint stuff */
3217 if (edge_serial
->is_epic
) {
3218 usb_kill_urb(edge_serial
->interrupt_read_urb
);
3219 usb_free_urb(edge_serial
->interrupt_read_urb
);
3220 kfree(edge_serial
->interrupt_in_buffer
);
3222 usb_kill_urb(edge_serial
->read_urb
);
3223 usb_free_urb(edge_serial
->read_urb
);
3224 kfree(edge_serial
->bulk_in_buffer
);
3228 usb_set_serial_data(serial
, NULL
);
3232 /****************************************************************************
3234 * This is called by the module subsystem, or on startup to initialize us
3235 ****************************************************************************/
3236 static int __init
edgeport_init(void)
3240 retval
= usb_serial_register(&edgeport_2port_device
);
3242 goto failed_2port_device_register
;
3243 retval
= usb_serial_register(&edgeport_4port_device
);
3245 goto failed_4port_device_register
;
3246 retval
= usb_serial_register(&edgeport_8port_device
);
3248 goto failed_8port_device_register
;
3249 retval
= usb_serial_register(&epic_device
);
3251 goto failed_epic_device_register
;
3252 retval
= usb_register(&io_driver
);
3254 goto failed_usb_register
;
3255 atomic_set(&CmdUrbs
, 0);
3256 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
3260 failed_usb_register
:
3261 usb_serial_deregister(&epic_device
);
3262 failed_epic_device_register
:
3263 usb_serial_deregister(&edgeport_8port_device
);
3264 failed_8port_device_register
:
3265 usb_serial_deregister(&edgeport_4port_device
);
3266 failed_4port_device_register
:
3267 usb_serial_deregister(&edgeport_2port_device
);
3268 failed_2port_device_register
:
3273 /****************************************************************************
3275 * Called when the driver is about to be unloaded.
3276 ****************************************************************************/
3277 static void __exit
edgeport_exit (void)
3279 usb_deregister(&io_driver
);
3280 usb_serial_deregister(&edgeport_2port_device
);
3281 usb_serial_deregister(&edgeport_4port_device
);
3282 usb_serial_deregister(&edgeport_8port_device
);
3283 usb_serial_deregister(&epic_device
);
3286 module_init(edgeport_init
);
3287 module_exit(edgeport_exit
);
3289 /* Module information */
3290 MODULE_AUTHOR(DRIVER_AUTHOR
);
3291 MODULE_DESCRIPTION(DRIVER_DESC
);
3292 MODULE_LICENSE("GPL");
3293 MODULE_FIRMWARE("edgeport/boot.fw");
3294 MODULE_FIRMWARE("edgeport/boot2.fw");
3295 MODULE_FIRMWARE("edgeport/down.fw");
3296 MODULE_FIRMWARE("edgeport/down2.fw");
3298 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
3299 MODULE_PARM_DESC(debug
, "Debug enabled or not");
3301 module_param(low_latency
, bool, S_IRUGO
| S_IWUSR
);
3302 MODULE_PARM_DESC(low_latency
, "Low latency enabled or not");