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 unsigned char *data
= urb
->transfer_buffer
;
604 int length
= urb
->actual_length
;
610 int status
= urb
->status
;
621 /* this urb is terminated, clean up */
622 dbg("%s - urb shutting down with status: %d",
626 dbg("%s - nonzero urb status received: %d", __func__
, status
);
630 /* process this interrupt-read even if there are no ports open */
632 usb_serial_debug_data(debug
, &edge_serial
->serial
->dev
->dev
,
633 __func__
, length
, data
);
636 bytes_avail
= data
[0] | (data
[1] << 8);
638 spin_lock(&edge_serial
->es_lock
);
639 edge_serial
->rxBytesAvail
+= bytes_avail
;
640 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__
, bytes_avail
, edge_serial
->rxBytesAvail
, edge_serial
->read_in_progress
);
642 if (edge_serial
->rxBytesAvail
> 0 &&
643 !edge_serial
->read_in_progress
) {
644 dbg("%s - posting a read", __func__
);
645 edge_serial
->read_in_progress
= true;
647 /* we have pending bytes on the
648 bulk in pipe, send a request */
649 edge_serial
->read_urb
->dev
= edge_serial
->serial
->dev
;
650 result
= usb_submit_urb(edge_serial
->read_urb
, GFP_ATOMIC
);
652 dev_err(&edge_serial
->serial
->dev
->dev
, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__
, result
);
653 edge_serial
->read_in_progress
= false;
656 spin_unlock(&edge_serial
->es_lock
);
659 /* grab the txcredits for the ports if available */
662 while ((position
< length
) &&
663 (portNumber
< edge_serial
->serial
->num_ports
)) {
664 txCredits
= data
[position
] | (data
[position
+1] << 8);
666 port
= edge_serial
->serial
->port
[portNumber
];
667 edge_port
= usb_get_serial_port_data(port
);
668 if (edge_port
->open
) {
669 spin_lock(&edge_port
->ep_lock
);
670 edge_port
->txCredits
+= txCredits
;
671 spin_unlock(&edge_port
->ep_lock
);
672 dbg("%s - txcredits for port%d = %d",
673 __func__
, portNumber
,
674 edge_port
->txCredits
);
676 /* tell the tty driver that something
678 if (edge_port
->port
->port
.tty
)
679 tty_wakeup(edge_port
->port
->port
.tty
);
681 /* Since we have more credit, check
682 if more data can be sent */
683 send_more_port_data(edge_serial
,
693 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
695 dev_err(&urb
->dev
->dev
,
696 "%s - Error %d submitting control urb\n",
701 /*****************************************************************************
702 * edge_bulk_in_callback
703 * this is the callback function for when we have received data on the
705 *****************************************************************************/
706 static void edge_bulk_in_callback(struct urb
*urb
)
708 struct edgeport_serial
*edge_serial
= urb
->context
;
709 unsigned char *data
= urb
->transfer_buffer
;
711 __u16 raw_data_length
;
712 int status
= urb
->status
;
717 dbg("%s - nonzero read bulk status received: %d",
719 edge_serial
->read_in_progress
= false;
723 if (urb
->actual_length
== 0) {
724 dbg("%s - read bulk callback with no data", __func__
);
725 edge_serial
->read_in_progress
= false;
729 raw_data_length
= urb
->actual_length
;
731 usb_serial_debug_data(debug
, &edge_serial
->serial
->dev
->dev
,
732 __func__
, raw_data_length
, data
);
734 spin_lock(&edge_serial
->es_lock
);
736 /* decrement our rxBytes available by the number that we just got */
737 edge_serial
->rxBytesAvail
-= raw_data_length
;
739 dbg("%s - Received = %d, rxBytesAvail %d", __func__
,
740 raw_data_length
, edge_serial
->rxBytesAvail
);
742 process_rcvd_data(edge_serial
, data
, urb
->actual_length
);
744 /* check to see if there's any more data for us to read */
745 if (edge_serial
->rxBytesAvail
> 0) {
746 dbg("%s - posting a read", __func__
);
747 edge_serial
->read_urb
->dev
= edge_serial
->serial
->dev
;
748 retval
= usb_submit_urb(edge_serial
->read_urb
, GFP_ATOMIC
);
750 dev_err(&urb
->dev
->dev
,
751 "%s - usb_submit_urb(read bulk) failed, "
752 "retval = %d\n", __func__
, retval
);
753 edge_serial
->read_in_progress
= false;
756 edge_serial
->read_in_progress
= false;
759 spin_unlock(&edge_serial
->es_lock
);
763 /*****************************************************************************
764 * edge_bulk_out_data_callback
765 * this is the callback function for when we have finished sending
766 * serial data on the bulk out endpoint.
767 *****************************************************************************/
768 static void edge_bulk_out_data_callback(struct urb
*urb
)
770 struct edgeport_port
*edge_port
= urb
->context
;
771 struct tty_struct
*tty
;
772 int status
= urb
->status
;
777 dbg("%s - nonzero write bulk status received: %d",
781 tty
= edge_port
->port
->port
.tty
;
783 if (tty
&& edge_port
->open
) {
784 /* let the tty driver wakeup if it has a special
785 write_wakeup function */
789 /* Release the Write URB */
790 edge_port
->write_in_progress
= false;
792 /* Check if more data needs to be sent */
793 send_more_port_data((struct edgeport_serial
*)
794 (usb_get_serial_data(edge_port
->port
->serial
)), edge_port
);
798 /*****************************************************************************
800 * this is the callback function for when we have finished sending a
801 * command on the bulk out endpoint.
802 *****************************************************************************/
803 static void edge_bulk_out_cmd_callback(struct urb
*urb
)
805 struct edgeport_port
*edge_port
= urb
->context
;
806 struct tty_struct
*tty
;
807 int status
= urb
->status
;
811 atomic_dec(&CmdUrbs
);
812 dbg("%s - FREE URB %p (outstanding %d)", __func__
,
813 urb
, atomic_read(&CmdUrbs
));
816 /* clean up the transfer buffer */
817 kfree(urb
->transfer_buffer
);
819 /* Free the command urb */
823 dbg("%s - nonzero write bulk status received: %d",
828 /* Get pointer to tty */
829 tty
= edge_port
->port
->port
.tty
;
831 /* tell the tty driver that something has changed */
832 if (tty
&& edge_port
->open
)
835 /* we have completed the command */
836 edge_port
->commandPending
= false;
837 wake_up(&edge_port
->wait_command
);
841 /*****************************************************************************
842 * Driver tty interface functions
843 *****************************************************************************/
845 /*****************************************************************************
847 * this function is called by the tty driver when a port is opened
848 * If successful, we return 0
849 * Otherwise we return a negative error number.
850 *****************************************************************************/
851 static int edge_open(struct tty_struct
*tty
,
852 struct usb_serial_port
*port
, struct file
*filp
)
854 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
855 struct usb_serial
*serial
;
856 struct edgeport_serial
*edge_serial
;
859 dbg("%s - port %d", __func__
, port
->number
);
861 if (edge_port
== NULL
)
865 tty
->low_latency
= low_latency
;
867 /* see if we've set up our endpoint info yet (can't set it up
868 in edge_startup as the structures were not set up at that time.) */
869 serial
= port
->serial
;
870 edge_serial
= usb_get_serial_data(serial
);
871 if (edge_serial
== NULL
)
873 if (edge_serial
->interrupt_in_buffer
== NULL
) {
874 struct usb_serial_port
*port0
= serial
->port
[0];
876 /* not set up yet, so do it now */
877 edge_serial
->interrupt_in_buffer
=
878 port0
->interrupt_in_buffer
;
879 edge_serial
->interrupt_in_endpoint
=
880 port0
->interrupt_in_endpointAddress
;
881 edge_serial
->interrupt_read_urb
= port0
->interrupt_in_urb
;
882 edge_serial
->bulk_in_buffer
= port0
->bulk_in_buffer
;
883 edge_serial
->bulk_in_endpoint
=
884 port0
->bulk_in_endpointAddress
;
885 edge_serial
->read_urb
= port0
->read_urb
;
886 edge_serial
->bulk_out_endpoint
=
887 port0
->bulk_out_endpointAddress
;
889 /* set up our interrupt urb */
890 usb_fill_int_urb(edge_serial
->interrupt_read_urb
,
892 usb_rcvintpipe(serial
->dev
,
893 port0
->interrupt_in_endpointAddress
),
894 port0
->interrupt_in_buffer
,
895 edge_serial
->interrupt_read_urb
->transfer_buffer_length
,
896 edge_interrupt_callback
, edge_serial
,
897 edge_serial
->interrupt_read_urb
->interval
);
899 /* set up our bulk in urb */
900 usb_fill_bulk_urb(edge_serial
->read_urb
, serial
->dev
,
901 usb_rcvbulkpipe(serial
->dev
,
902 port0
->bulk_in_endpointAddress
),
903 port0
->bulk_in_buffer
,
904 edge_serial
->read_urb
->transfer_buffer_length
,
905 edge_bulk_in_callback
, edge_serial
);
906 edge_serial
->read_in_progress
= false;
908 /* start interrupt read for this edgeport
909 * this interrupt will continue as long
910 * as the edgeport is connected */
911 response
= usb_submit_urb(edge_serial
->interrupt_read_urb
,
915 "%s - Error %d submitting control urb\n",
920 /* initialize our wait queues */
921 init_waitqueue_head(&edge_port
->wait_open
);
922 init_waitqueue_head(&edge_port
->wait_chase
);
923 init_waitqueue_head(&edge_port
->delta_msr_wait
);
924 init_waitqueue_head(&edge_port
->wait_command
);
926 /* initialize our icount structure */
927 memset(&(edge_port
->icount
), 0x00, sizeof(edge_port
->icount
));
929 /* initialize our port settings */
930 edge_port
->txCredits
= 0; /* Can't send any data yet */
931 /* Must always set this bit to enable ints! */
932 edge_port
->shadowMCR
= MCR_MASTER_IE
;
933 edge_port
->chaseResponsePending
= false;
935 /* send a open port command */
936 edge_port
->openPending
= true;
937 edge_port
->open
= false;
938 response
= send_iosp_ext_cmd(edge_port
, IOSP_CMD_OPEN_PORT
, 0);
941 dev_err(&port
->dev
, "%s - error sending open port command\n",
943 edge_port
->openPending
= false;
947 /* now wait for the port to be completely opened */
948 wait_event_timeout(edge_port
->wait_open
, !edge_port
->openPending
,
951 if (!edge_port
->open
) {
953 dbg("%s - open timedout", __func__
);
954 edge_port
->openPending
= false;
958 /* create the txfifo */
959 edge_port
->txfifo
.head
= 0;
960 edge_port
->txfifo
.tail
= 0;
961 edge_port
->txfifo
.count
= 0;
962 edge_port
->txfifo
.size
= edge_port
->maxTxCredits
;
963 edge_port
->txfifo
.fifo
= kmalloc(edge_port
->maxTxCredits
, GFP_KERNEL
);
965 if (!edge_port
->txfifo
.fifo
) {
966 dbg("%s - no memory", __func__
);
967 edge_close(tty
, port
, filp
);
971 /* Allocate a URB for the write */
972 edge_port
->write_urb
= usb_alloc_urb(0, GFP_KERNEL
);
973 edge_port
->write_in_progress
= false;
975 if (!edge_port
->write_urb
) {
976 dbg("%s - no memory", __func__
);
977 edge_close(tty
, port
, filp
);
981 dbg("%s(%d) - Initialize TX fifo to %d bytes",
982 __func__
, port
->number
, edge_port
->maxTxCredits
);
984 dbg("%s exited", __func__
);
990 /************************************************************************
992 * block_until_chase_response
994 * This function will block the close until one of the following:
995 * 1. Response to our Chase comes from Edgeport
996 * 2. A timeout of 10 seconds without activity has expired
997 * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
999 ************************************************************************/
1000 static void block_until_chase_response(struct edgeport_port
*edge_port
)
1008 /* Save Last credits */
1009 lastCredits
= edge_port
->txCredits
;
1011 /* Did we get our Chase response */
1012 if (!edge_port
->chaseResponsePending
) {
1013 dbg("%s - Got Chase Response", __func__
);
1015 /* did we get all of our credit back? */
1016 if (edge_port
->txCredits
== edge_port
->maxTxCredits
) {
1017 dbg("%s - Got all credits", __func__
);
1022 /* Block the thread for a while */
1023 prepare_to_wait(&edge_port
->wait_chase
, &wait
,
1024 TASK_UNINTERRUPTIBLE
);
1025 schedule_timeout(timeout
);
1026 finish_wait(&edge_port
->wait_chase
, &wait
);
1028 if (lastCredits
== edge_port
->txCredits
) {
1029 /* No activity.. count down. */
1032 edge_port
->chaseResponsePending
= false;
1033 dbg("%s - Chase TIMEOUT", __func__
);
1037 /* Reset timeout value back to 10 seconds */
1038 dbg("%s - Last %d, Current %d", __func__
,
1039 lastCredits
, edge_port
->txCredits
);
1046 /************************************************************************
1048 * block_until_tx_empty
1050 * This function will block the close until one of the following:
1052 * 2. The edgeport has stopped
1053 * 3. A timeout of 3 seconds without activity has expired
1055 ************************************************************************/
1056 static void block_until_tx_empty(struct edgeport_port
*edge_port
)
1059 struct TxFifo
*fifo
= &edge_port
->txfifo
;
1061 int timeout
= HZ
/10;
1065 /* Save Last count */
1066 lastCount
= fifo
->count
;
1068 /* Is the Edgeport Buffer empty? */
1069 if (lastCount
== 0) {
1070 dbg("%s - TX Buffer Empty", __func__
);
1074 /* Block the thread for a while */
1075 prepare_to_wait(&edge_port
->wait_chase
, &wait
,
1076 TASK_UNINTERRUPTIBLE
);
1077 schedule_timeout(timeout
);
1078 finish_wait(&edge_port
->wait_chase
, &wait
);
1080 dbg("%s wait", __func__
);
1082 if (lastCount
== fifo
->count
) {
1083 /* No activity.. count down. */
1086 dbg("%s - TIMEOUT", __func__
);
1090 /* Reset timeout value back to seconds */
1097 /*****************************************************************************
1099 * this function is called by the tty driver when a port is closed
1100 *****************************************************************************/
1101 static void edge_close(struct tty_struct
*tty
,
1102 struct usb_serial_port
*port
, struct file
*filp
)
1104 struct edgeport_serial
*edge_serial
;
1105 struct edgeport_port
*edge_port
;
1108 dbg("%s - port %d", __func__
, port
->number
);
1110 edge_serial
= usb_get_serial_data(port
->serial
);
1111 edge_port
= usb_get_serial_port_data(port
);
1112 if (edge_serial
== NULL
|| edge_port
== NULL
)
1115 /* block until tx is empty */
1116 block_until_tx_empty(edge_port
);
1118 edge_port
->closePending
= true;
1120 if ((!edge_serial
->is_epic
) ||
1121 ((edge_serial
->is_epic
) &&
1122 (edge_serial
->epic_descriptor
.Supports
.IOSPChase
))) {
1123 /* flush and chase */
1124 edge_port
->chaseResponsePending
= true;
1126 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__
);
1127 status
= send_iosp_ext_cmd(edge_port
, IOSP_CMD_CHASE_PORT
, 0);
1129 /* block until chase finished */
1130 block_until_chase_response(edge_port
);
1132 edge_port
->chaseResponsePending
= false;
1135 if ((!edge_serial
->is_epic
) ||
1136 ((edge_serial
->is_epic
) &&
1137 (edge_serial
->epic_descriptor
.Supports
.IOSPClose
))) {
1138 /* close the port */
1139 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__
);
1140 send_iosp_ext_cmd(edge_port
, IOSP_CMD_CLOSE_PORT
, 0);
1143 /* port->close = true; */
1144 edge_port
->closePending
= false;
1145 edge_port
->open
= false;
1146 edge_port
->openPending
= false;
1148 usb_kill_urb(edge_port
->write_urb
);
1150 if (edge_port
->write_urb
) {
1151 /* if this urb had a transfer buffer already
1152 (old transfer) free it */
1153 kfree(edge_port
->write_urb
->transfer_buffer
);
1154 usb_free_urb(edge_port
->write_urb
);
1155 edge_port
->write_urb
= NULL
;
1157 kfree(edge_port
->txfifo
.fifo
);
1158 edge_port
->txfifo
.fifo
= NULL
;
1160 dbg("%s exited", __func__
);
1163 /*****************************************************************************
1165 * this function is called by the tty driver when data should be written
1167 * If successful, we return the number of bytes written, otherwise we
1168 * return a negative error number.
1169 *****************************************************************************/
1170 static int edge_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1171 const unsigned char *data
, int count
)
1173 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1174 struct TxFifo
*fifo
;
1179 unsigned long flags
;
1181 dbg("%s - port %d", __func__
, port
->number
);
1183 if (edge_port
== NULL
)
1186 /* get a pointer to the Tx fifo */
1187 fifo
= &edge_port
->txfifo
;
1189 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1191 /* calculate number of bytes to put in fifo */
1192 copySize
= min((unsigned int)count
,
1193 (edge_port
->txCredits
- fifo
->count
));
1195 dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes",
1196 __func__
, port
->number
, count
,
1197 edge_port
->txCredits
- fifo
->count
, copySize
);
1199 /* catch writes of 0 bytes which the tty driver likes to give us,
1200 and when txCredits is empty */
1201 if (copySize
== 0) {
1202 dbg("%s - copySize = Zero", __func__
);
1207 * since we can never overflow the buffer we do not have to check for a
1210 * the copy is done is two parts -- first fill to the end of the buffer
1211 * then copy the reset from the start of the buffer
1213 bytesleft
= fifo
->size
- fifo
->head
;
1214 firsthalf
= min(bytesleft
, copySize
);
1215 dbg("%s - copy %d bytes of %d into fifo ", __func__
,
1216 firsthalf
, bytesleft
);
1218 /* now copy our data */
1219 memcpy(&fifo
->fifo
[fifo
->head
], data
, firsthalf
);
1220 usb_serial_debug_data(debug
, &port
->dev
, __func__
,
1221 firsthalf
, &fifo
->fifo
[fifo
->head
]);
1223 /* update the index and size */
1224 fifo
->head
+= firsthalf
;
1225 fifo
->count
+= firsthalf
;
1227 /* wrap the index */
1228 if (fifo
->head
== fifo
->size
)
1231 secondhalf
= copySize
-firsthalf
;
1234 dbg("%s - copy rest of data %d", __func__
, secondhalf
);
1235 memcpy(&fifo
->fifo
[fifo
->head
], &data
[firsthalf
], secondhalf
);
1236 usb_serial_debug_data(debug
, &port
->dev
, __func__
,
1237 secondhalf
, &fifo
->fifo
[fifo
->head
]);
1238 /* update the index and size */
1239 fifo
->count
+= secondhalf
;
1240 fifo
->head
+= secondhalf
;
1241 /* No need to check for wrap since we can not get to end of
1242 * the fifo in this part
1247 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1249 send_more_port_data((struct edgeport_serial
*)
1250 usb_get_serial_data(port
->serial
), edge_port
);
1252 dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__
,
1253 copySize
, edge_port
->txCredits
, fifo
->count
);
1259 /************************************************************************
1261 * send_more_port_data()
1263 * This routine attempts to write additional UART transmit data
1264 * to a port over the USB bulk pipe. It is called (1) when new
1265 * data has been written to a port's TxBuffer from higher layers
1266 * (2) when the peripheral sends us additional TxCredits indicating
1267 * that it can accept more Tx data for a given port; and (3) when
1268 * a bulk write completes successfully and we want to see if we
1269 * can transmit more.
1271 ************************************************************************/
1272 static void send_more_port_data(struct edgeport_serial
*edge_serial
,
1273 struct edgeport_port
*edge_port
)
1275 struct TxFifo
*fifo
= &edge_port
->txfifo
;
1277 unsigned char *buffer
;
1283 unsigned long flags
;
1285 dbg("%s(%d)", __func__
, edge_port
->port
->number
);
1287 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1289 if (edge_port
->write_in_progress
||
1291 (fifo
->count
== 0)) {
1292 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1293 __func__
, edge_port
->port
->number
,
1294 fifo
->count
, edge_port
->write_in_progress
);
1298 /* since the amount of data in the fifo will always fit into the
1299 * edgeport buffer we do not need to check the write length
1301 * Do we have enough credits for this port to make it worthwhile
1302 * to bother queueing a write. If it's too small, say a few bytes,
1303 * it's better to wait for more credits so we can do a larger write.
1305 if (edge_port
->txCredits
< EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port
->maxTxCredits
, EDGE_FW_BULK_MAX_PACKET_SIZE
)) {
1306 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1307 __func__
, edge_port
->port
->number
, fifo
->count
,
1308 edge_port
->txCredits
);
1312 /* lock this write */
1313 edge_port
->write_in_progress
= true;
1315 /* get a pointer to the write_urb */
1316 urb
= edge_port
->write_urb
;
1318 /* make sure transfer buffer is freed */
1319 kfree(urb
->transfer_buffer
);
1320 urb
->transfer_buffer
= NULL
;
1322 /* build the data header for the buffer and port that we are about
1324 count
= fifo
->count
;
1325 buffer
= kmalloc(count
+2, GFP_ATOMIC
);
1326 if (buffer
== NULL
) {
1327 dev_err(&edge_port
->port
->dev
,
1328 "%s - no more kernel memory...\n", __func__
);
1329 edge_port
->write_in_progress
= false;
1332 buffer
[0] = IOSP_BUILD_DATA_HDR1(edge_port
->port
->number
1333 - edge_port
->port
->serial
->minor
, count
);
1334 buffer
[1] = IOSP_BUILD_DATA_HDR2(edge_port
->port
->number
1335 - edge_port
->port
->serial
->minor
, count
);
1337 /* now copy our data */
1338 bytesleft
= fifo
->size
- fifo
->tail
;
1339 firsthalf
= min(bytesleft
, count
);
1340 memcpy(&buffer
[2], &fifo
->fifo
[fifo
->tail
], firsthalf
);
1341 fifo
->tail
+= firsthalf
;
1342 fifo
->count
-= firsthalf
;
1343 if (fifo
->tail
== fifo
->size
)
1346 secondhalf
= count
-firsthalf
;
1348 memcpy(&buffer
[2+firsthalf
], &fifo
->fifo
[fifo
->tail
],
1350 fifo
->tail
+= secondhalf
;
1351 fifo
->count
-= secondhalf
;
1355 usb_serial_debug_data(debug
, &edge_port
->port
->dev
,
1356 __func__
, count
, &buffer
[2]);
1358 /* fill up the urb with all of our data and submit it */
1359 usb_fill_bulk_urb(urb
, edge_serial
->serial
->dev
,
1360 usb_sndbulkpipe(edge_serial
->serial
->dev
,
1361 edge_serial
->bulk_out_endpoint
),
1363 edge_bulk_out_data_callback
, edge_port
);
1365 /* decrement the number of credits we have by the number we just sent */
1366 edge_port
->txCredits
-= count
;
1367 edge_port
->icount
.tx
+= count
;
1369 urb
->dev
= edge_serial
->serial
->dev
;
1370 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1372 /* something went wrong */
1373 dev_err(&edge_port
->port
->dev
,
1374 "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1376 edge_port
->write_in_progress
= false;
1378 /* revert the credits as something bad happened. */
1379 edge_port
->txCredits
+= count
;
1380 edge_port
->icount
.tx
-= count
;
1382 dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1383 __func__
, count
, edge_port
->txCredits
, fifo
->count
);
1386 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1390 /*****************************************************************************
1392 * this function is called by the tty driver when it wants to know how
1393 * many bytes of data we can accept for a specific port. If successful,
1394 * we return the amount of room that we have for this port (the txCredits)
1395 * otherwise we return a negative error number.
1396 *****************************************************************************/
1397 static int edge_write_room(struct tty_struct
*tty
)
1399 struct usb_serial_port
*port
= tty
->driver_data
;
1400 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1402 unsigned long flags
;
1404 dbg("%s", __func__
);
1406 if (edge_port
== NULL
)
1408 if (edge_port
->closePending
)
1411 dbg("%s - port %d", __func__
, port
->number
);
1413 if (!edge_port
->open
) {
1414 dbg("%s - port not opened", __func__
);
1418 /* total of both buffers is still txCredit */
1419 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1420 room
= edge_port
->txCredits
- edge_port
->txfifo
.count
;
1421 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1423 dbg("%s - returns %d", __func__
, room
);
1428 /*****************************************************************************
1429 * edge_chars_in_buffer
1430 * this function is called by the tty driver when it wants to know how
1431 * many bytes of data we currently have outstanding in the port (data that
1432 * has been written, but hasn't made it out the port yet)
1433 * If successful, we return the number of bytes left to be written in the
1435 * Otherwise we return a negative error number.
1436 *****************************************************************************/
1437 static int edge_chars_in_buffer(struct tty_struct
*tty
)
1439 struct usb_serial_port
*port
= tty
->driver_data
;
1440 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1442 unsigned long flags
;
1444 dbg("%s", __func__
);
1446 if (edge_port
== NULL
)
1448 if (edge_port
->closePending
)
1451 if (!edge_port
->open
) {
1452 dbg("%s - port not opened", __func__
);
1456 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1457 num_chars
= edge_port
->maxTxCredits
- edge_port
->txCredits
+
1458 edge_port
->txfifo
.count
;
1459 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1461 dbg("%s(port %d) - returns %d", __func__
,
1462 port
->number
, num_chars
);
1469 /*****************************************************************************
1471 * this function is called by the tty driver when it wants to stop the data
1472 * being read from the port.
1473 *****************************************************************************/
1474 static void edge_throttle(struct tty_struct
*tty
)
1476 struct usb_serial_port
*port
= tty
->driver_data
;
1477 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1480 dbg("%s - port %d", __func__
, port
->number
);
1482 if (edge_port
== NULL
)
1485 if (!edge_port
->open
) {
1486 dbg("%s - port not opened", __func__
);
1490 /* if we are implementing XON/XOFF, send the stop character */
1492 unsigned char stop_char
= STOP_CHAR(tty
);
1493 status
= edge_write(tty
, port
, &stop_char
, 1);
1498 /* if we are implementing RTS/CTS, toggle that line */
1499 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1500 edge_port
->shadowMCR
&= ~MCR_RTS
;
1501 status
= send_cmd_write_uart_register(edge_port
, MCR
,
1502 edge_port
->shadowMCR
);
1511 /*****************************************************************************
1513 * this function is called by the tty driver when it wants to resume the
1514 * data being read from the port (called after SerialThrottle is called)
1515 *****************************************************************************/
1516 static void edge_unthrottle(struct tty_struct
*tty
)
1518 struct usb_serial_port
*port
= tty
->driver_data
;
1519 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1522 dbg("%s - port %d", __func__
, port
->number
);
1524 if (edge_port
== NULL
)
1527 if (!edge_port
->open
) {
1528 dbg("%s - port not opened", __func__
);
1532 /* if we are implementing XON/XOFF, send the start character */
1534 unsigned char start_char
= START_CHAR(tty
);
1535 status
= edge_write(tty
, port
, &start_char
, 1);
1539 /* if we are implementing RTS/CTS, toggle that line */
1540 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1541 edge_port
->shadowMCR
|= MCR_RTS
;
1542 send_cmd_write_uart_register(edge_port
, MCR
,
1543 edge_port
->shadowMCR
);
1548 /*****************************************************************************
1550 * this function is called by the tty driver when it wants to change
1551 * the termios structure
1552 *****************************************************************************/
1553 static void edge_set_termios(struct tty_struct
*tty
,
1554 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
1556 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1559 cflag
= tty
->termios
->c_cflag
;
1560 dbg("%s - clfag %08x iflag %08x", __func__
,
1561 tty
->termios
->c_cflag
, tty
->termios
->c_iflag
);
1562 dbg("%s - old clfag %08x old iflag %08x", __func__
,
1563 old_termios
->c_cflag
, old_termios
->c_iflag
);
1565 dbg("%s - port %d", __func__
, port
->number
);
1567 if (edge_port
== NULL
)
1570 if (!edge_port
->open
) {
1571 dbg("%s - port not opened", __func__
);
1575 /* change the port settings to the new ones specified */
1576 change_port_settings(tty
, edge_port
, old_termios
);
1580 /*****************************************************************************
1581 * get_lsr_info - get line status register info
1583 * Purpose: Let user call ioctl() to get info when the UART physically
1584 * is emptied. On bus types like RS485, the transmitter must
1585 * release the bus after transmitting. This must be done when
1586 * the transmit shift register is empty, not be done when the
1587 * transmit holding register is empty. This functionality
1588 * allows an RS485 driver to be written in user space.
1589 *****************************************************************************/
1590 static int get_lsr_info(struct edgeport_port
*edge_port
,
1591 unsigned int __user
*value
)
1593 unsigned int result
= 0;
1594 unsigned long flags
;
1596 spin_lock_irqsave(&edge_port
->ep_lock
, flags
);
1597 if (edge_port
->maxTxCredits
== edge_port
->txCredits
&&
1598 edge_port
->txfifo
.count
== 0) {
1599 dbg("%s -- Empty", __func__
);
1600 result
= TIOCSER_TEMT
;
1602 spin_unlock_irqrestore(&edge_port
->ep_lock
, flags
);
1604 if (copy_to_user(value
, &result
, sizeof(int)))
1609 static int edge_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1610 unsigned int set
, unsigned int clear
)
1612 struct usb_serial_port
*port
= tty
->driver_data
;
1613 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1616 dbg("%s - port %d", __func__
, port
->number
);
1618 mcr
= edge_port
->shadowMCR
;
1619 if (set
& TIOCM_RTS
)
1621 if (set
& TIOCM_DTR
)
1623 if (set
& TIOCM_LOOP
)
1624 mcr
|= MCR_LOOPBACK
;
1626 if (clear
& TIOCM_RTS
)
1628 if (clear
& TIOCM_DTR
)
1630 if (clear
& TIOCM_LOOP
)
1631 mcr
&= ~MCR_LOOPBACK
;
1633 edge_port
->shadowMCR
= mcr
;
1635 send_cmd_write_uart_register(edge_port
, MCR
, edge_port
->shadowMCR
);
1640 static int edge_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1642 struct usb_serial_port
*port
= tty
->driver_data
;
1643 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1644 unsigned int result
= 0;
1648 dbg("%s - port %d", __func__
, port
->number
);
1650 msr
= edge_port
->shadowMSR
;
1651 mcr
= edge_port
->shadowMCR
;
1652 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0) /* 0x002 */
1653 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0) /* 0x004 */
1654 | ((msr
& EDGEPORT_MSR_CTS
) ? TIOCM_CTS
: 0) /* 0x020 */
1655 | ((msr
& EDGEPORT_MSR_CD
) ? TIOCM_CAR
: 0) /* 0x040 */
1656 | ((msr
& EDGEPORT_MSR_RI
) ? TIOCM_RI
: 0) /* 0x080 */
1657 | ((msr
& EDGEPORT_MSR_DSR
) ? TIOCM_DSR
: 0); /* 0x100 */
1660 dbg("%s -- %x", __func__
, result
);
1665 static int get_serial_info(struct edgeport_port
*edge_port
,
1666 struct serial_struct __user
*retinfo
)
1668 struct serial_struct tmp
;
1673 memset(&tmp
, 0, sizeof(tmp
));
1675 tmp
.type
= PORT_16550A
;
1676 tmp
.line
= edge_port
->port
->serial
->minor
;
1677 tmp
.port
= edge_port
->port
->number
;
1679 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
1680 tmp
.xmit_fifo_size
= edge_port
->maxTxCredits
;
1681 tmp
.baud_base
= 9600;
1682 tmp
.close_delay
= 5*HZ
;
1683 tmp
.closing_wait
= 30*HZ
;
1685 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1692 /*****************************************************************************
1694 * this function handles any ioctl calls to the driver
1695 *****************************************************************************/
1696 static int edge_ioctl(struct tty_struct
*tty
, struct file
*file
,
1697 unsigned int cmd
, unsigned long arg
)
1699 struct usb_serial_port
*port
= tty
->driver_data
;
1701 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1702 struct async_icount cnow
;
1703 struct async_icount cprev
;
1704 struct serial_icounter_struct icount
;
1706 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
1710 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
1711 return get_lsr_info(edge_port
, (unsigned int __user
*) arg
);
1714 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
1715 return get_serial_info(edge_port
, (struct serial_struct __user
*) arg
);
1718 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
1719 cprev
= edge_port
->icount
;
1721 prepare_to_wait(&edge_port
->delta_msr_wait
,
1722 &wait
, TASK_INTERRUPTIBLE
);
1724 finish_wait(&edge_port
->delta_msr_wait
, &wait
);
1725 /* see if a signal did it */
1726 if (signal_pending(current
))
1727 return -ERESTARTSYS
;
1728 cnow
= edge_port
->icount
;
1729 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
1730 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
1731 return -EIO
; /* no change => error */
1732 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
1733 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
1734 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
1735 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
1744 cnow
= edge_port
->icount
;
1745 memset(&icount
, 0, sizeof(icount
));
1746 icount
.cts
= cnow
.cts
;
1747 icount
.dsr
= cnow
.dsr
;
1748 icount
.rng
= cnow
.rng
;
1749 icount
.dcd
= cnow
.dcd
;
1750 icount
.rx
= cnow
.rx
;
1751 icount
.tx
= cnow
.tx
;
1752 icount
.frame
= cnow
.frame
;
1753 icount
.overrun
= cnow
.overrun
;
1754 icount
.parity
= cnow
.parity
;
1755 icount
.brk
= cnow
.brk
;
1756 icount
.buf_overrun
= cnow
.buf_overrun
;
1758 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1759 __func__
, port
->number
, icount
.rx
, icount
.tx
);
1760 if (copy_to_user((void __user
*)arg
, &icount
, sizeof(icount
)))
1764 return -ENOIOCTLCMD
;
1768 /*****************************************************************************
1770 * this function sends a break to the port
1771 *****************************************************************************/
1772 static void edge_break(struct tty_struct
*tty
, int break_state
)
1774 struct usb_serial_port
*port
= tty
->driver_data
;
1775 struct edgeport_port
*edge_port
= usb_get_serial_port_data(port
);
1776 struct edgeport_serial
*edge_serial
= usb_get_serial_data(port
->serial
);
1779 if ((!edge_serial
->is_epic
) ||
1780 ((edge_serial
->is_epic
) &&
1781 (edge_serial
->epic_descriptor
.Supports
.IOSPChase
))) {
1782 /* flush and chase */
1783 edge_port
->chaseResponsePending
= true;
1785 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__
);
1786 status
= send_iosp_ext_cmd(edge_port
, IOSP_CMD_CHASE_PORT
, 0);
1788 /* block until chase finished */
1789 block_until_chase_response(edge_port
);
1791 edge_port
->chaseResponsePending
= false;
1795 if ((!edge_serial
->is_epic
) ||
1796 ((edge_serial
->is_epic
) &&
1797 (edge_serial
->epic_descriptor
.Supports
.IOSPSetClrBreak
))) {
1798 if (break_state
== -1) {
1799 dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__
);
1800 status
= send_iosp_ext_cmd(edge_port
,
1801 IOSP_CMD_SET_BREAK
, 0);
1803 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__
);
1804 status
= send_iosp_ext_cmd(edge_port
,
1805 IOSP_CMD_CLEAR_BREAK
, 0);
1808 dbg("%s - error sending break set/clear command.",
1816 /*****************************************************************************
1818 * this function handles the data received on the bulk in pipe.
1819 *****************************************************************************/
1820 static void process_rcvd_data(struct edgeport_serial
*edge_serial
,
1821 unsigned char *buffer
, __u16 bufferLength
)
1823 struct usb_serial_port
*port
;
1824 struct edgeport_port
*edge_port
;
1825 struct tty_struct
*tty
;
1826 __u16 lastBufferLength
;
1829 dbg("%s", __func__
);
1831 lastBufferLength
= bufferLength
+ 1;
1833 while (bufferLength
> 0) {
1834 /* failsafe incase we get a message that we don't understand */
1835 if (lastBufferLength
== bufferLength
) {
1836 dbg("%s - stuck in loop, exiting it.", __func__
);
1839 lastBufferLength
= bufferLength
;
1841 switch (edge_serial
->rxState
) {
1843 edge_serial
->rxHeader1
= *buffer
;
1847 if (bufferLength
== 0) {
1848 edge_serial
->rxState
= EXPECT_HDR2
;
1851 /* otherwise, drop on through */
1853 edge_serial
->rxHeader2
= *buffer
;
1857 dbg("%s - Hdr1=%02X Hdr2=%02X", __func__
,
1858 edge_serial
->rxHeader1
, edge_serial
->rxHeader2
);
1859 /* Process depending on whether this header is
1862 if (IS_CMD_STAT_HDR(edge_serial
->rxHeader1
)) {
1863 /* Decode this status header and go to
1864 * EXPECT_HDR1 (if we can process the status
1865 * with only 2 bytes), or go to EXPECT_HDR3 to
1866 * get the third byte. */
1867 edge_serial
->rxPort
=
1868 IOSP_GET_HDR_PORT(edge_serial
->rxHeader1
);
1869 edge_serial
->rxStatusCode
=
1870 IOSP_GET_STATUS_CODE(
1871 edge_serial
->rxHeader1
);
1873 if (!IOSP_STATUS_IS_2BYTE(
1874 edge_serial
->rxStatusCode
)) {
1875 /* This status needs additional bytes.
1876 * Save what we have and then wait for
1879 edge_serial
->rxStatusParam
1880 = edge_serial
->rxHeader2
;
1881 edge_serial
->rxState
= EXPECT_HDR3
;
1884 /* We have all the header bytes, process the
1886 process_rcvd_status(edge_serial
,
1887 edge_serial
->rxHeader2
, 0);
1888 edge_serial
->rxState
= EXPECT_HDR1
;
1891 edge_serial
->rxPort
=
1892 IOSP_GET_HDR_PORT(edge_serial
->rxHeader1
);
1893 edge_serial
->rxBytesRemaining
=
1894 IOSP_GET_HDR_DATA_LEN(
1895 edge_serial
->rxHeader1
,
1896 edge_serial
->rxHeader2
);
1897 dbg("%s - Data for Port %u Len %u",
1899 edge_serial
->rxPort
,
1900 edge_serial
->rxBytesRemaining
);
1902 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1903 * ASSERT(DevExt->RxBytesRemaining <
1904 * IOSP_MAX_DATA_LENGTH);
1907 if (bufferLength
== 0) {
1908 edge_serial
->rxState
= EXPECT_DATA
;
1911 /* Else, drop through */
1913 case EXPECT_DATA
: /* Expect data */
1914 if (bufferLength
< edge_serial
->rxBytesRemaining
) {
1915 rxLen
= bufferLength
;
1916 /* Expect data to start next buffer */
1917 edge_serial
->rxState
= EXPECT_DATA
;
1919 /* BufLen >= RxBytesRemaining */
1920 rxLen
= edge_serial
->rxBytesRemaining
;
1921 /* Start another header next time */
1922 edge_serial
->rxState
= EXPECT_HDR1
;
1925 bufferLength
-= rxLen
;
1926 edge_serial
->rxBytesRemaining
-= rxLen
;
1928 /* spit this data back into the tty driver if this
1931 port
= edge_serial
->serial
->port
[
1932 edge_serial
->rxPort
];
1933 edge_port
= usb_get_serial_port_data(port
);
1934 if (edge_port
->open
) {
1935 tty
= edge_port
->port
->port
.tty
;
1937 dbg("%s - Sending %d bytes to TTY for port %d",
1938 __func__
, rxLen
, edge_serial
->rxPort
);
1939 edge_tty_recv(&edge_serial
->serial
->dev
->dev
, tty
, buffer
, rxLen
);
1941 edge_port
->icount
.rx
+= rxLen
;
1947 case EXPECT_HDR3
: /* Expect 3rd byte of status header */
1948 edge_serial
->rxHeader3
= *buffer
;
1952 /* We have all the header bytes, process the
1954 process_rcvd_status(edge_serial
,
1955 edge_serial
->rxStatusParam
,
1956 edge_serial
->rxHeader3
);
1957 edge_serial
->rxState
= EXPECT_HDR1
;
1964 /*****************************************************************************
1965 * process_rcvd_status
1966 * this function handles the any status messages received on the
1968 *****************************************************************************/
1969 static void process_rcvd_status(struct edgeport_serial
*edge_serial
,
1970 __u8 byte2
, __u8 byte3
)
1972 struct usb_serial_port
*port
;
1973 struct edgeport_port
*edge_port
;
1974 __u8 code
= edge_serial
->rxStatusCode
;
1976 /* switch the port pointer to the one being currently talked about */
1977 port
= edge_serial
->serial
->port
[edge_serial
->rxPort
];
1978 edge_port
= usb_get_serial_port_data(port
);
1979 if (edge_port
== NULL
) {
1980 dev_err(&edge_serial
->serial
->dev
->dev
,
1981 "%s - edge_port == NULL for port %d\n",
1982 __func__
, edge_serial
->rxPort
);
1986 dbg("%s - port %d", __func__
, edge_serial
->rxPort
);
1988 if (code
== IOSP_EXT_STATUS
) {
1990 case IOSP_EXT_STATUS_CHASE_RSP
:
1991 /* we want to do EXT status regardless of port
1993 dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1994 __func__
, edge_serial
->rxPort
, byte3
);
1995 /* Currently, the only EXT_STATUS is Chase, so process
1996 * here instead of one more call to one more subroutine
1997 * If/when more EXT_STATUS, there'll be more work to do
1998 * Also, we currently clear flag and close the port
1999 * regardless of content of above's Byte3.
2000 * We could choose to do something else when Byte3 says
2001 * Timeout on Chase from Edgeport, like wait longer in
2002 * block_until_chase_response, but for now we don't.
2004 edge_port
->chaseResponsePending
= false;
2005 wake_up(&edge_port
->wait_chase
);
2008 case IOSP_EXT_STATUS_RX_CHECK_RSP
:
2009 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__
, edge_serial
->rxPort
, byte3
);
2010 /* Port->RxCheckRsp = true; */
2015 if (code
== IOSP_STATUS_OPEN_RSP
) {
2016 edge_port
->txCredits
= GET_TX_BUFFER_SIZE(byte3
);
2017 edge_port
->maxTxCredits
= edge_port
->txCredits
;
2018 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__
, edge_serial
->rxPort
, byte2
, edge_port
->txCredits
);
2019 handle_new_msr(edge_port
, byte2
);
2021 /* send the current line settings to the port so we are
2022 in sync with any further termios calls */
2023 /* FIXME: locking on tty */
2024 if (edge_port
->port
->port
.tty
)
2025 change_port_settings(edge_port
->port
->port
.tty
,
2026 edge_port
, edge_port
->port
->port
.tty
->termios
);
2028 /* we have completed the open */
2029 edge_port
->openPending
= false;
2030 edge_port
->open
= true;
2031 wake_up(&edge_port
->wait_open
);
2035 /* If port is closed, silently discard all rcvd status. We can
2036 * have cases where buffered status is received AFTER the close
2037 * port command is sent to the Edgeport.
2039 if (!edge_port
->open
|| edge_port
->closePending
)
2043 /* Not currently sent by Edgeport */
2044 case IOSP_STATUS_LSR
:
2045 dbg("%s - Port %u LSR Status = %02x",
2046 __func__
, edge_serial
->rxPort
, byte2
);
2047 handle_new_lsr(edge_port
, false, byte2
, 0);
2050 case IOSP_STATUS_LSR_DATA
:
2051 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2052 __func__
, edge_serial
->rxPort
, byte2
, byte3
);
2053 /* byte2 is LSR Register */
2054 /* byte3 is broken data byte */
2055 handle_new_lsr(edge_port
, true, byte2
, byte3
);
2058 * case IOSP_EXT_4_STATUS:
2059 * dbg("%s - Port %u LSR Status = %02x Data = %02x",
2060 * __func__, edge_serial->rxPort, byte2, byte3);
2063 case IOSP_STATUS_MSR
:
2064 dbg("%s - Port %u MSR Status = %02x",
2065 __func__
, edge_serial
->rxPort
, byte2
);
2067 * Process this new modem status and generate appropriate
2068 * events, etc, based on the new status. This routine
2069 * also saves the MSR in Port->ShadowMsr.
2071 handle_new_msr(edge_port
, byte2
);
2075 dbg("%s - Unrecognized IOSP status code %u\n", __func__
, code
);
2082 /*****************************************************************************
2084 * this function passes data on to the tty flip buffer
2085 *****************************************************************************/
2086 static void edge_tty_recv(struct device
*dev
, struct tty_struct
*tty
,
2087 unsigned char *data
, int length
)
2092 cnt
= tty_buffer_request_room(tty
, length
);
2094 dev_err(dev
, "%s - dropping data, %d bytes lost\n",
2095 __func__
, length
- cnt
);
2099 tty_insert_flip_string(tty
, data
, cnt
);
2102 } while (length
> 0);
2104 tty_flip_buffer_push(tty
);
2108 /*****************************************************************************
2110 * this function handles any change to the msr register for a port.
2111 *****************************************************************************/
2112 static void handle_new_msr(struct edgeport_port
*edge_port
, __u8 newMsr
)
2114 struct async_icount
*icount
;
2116 dbg("%s %02x", __func__
, newMsr
);
2118 if (newMsr
& (EDGEPORT_MSR_DELTA_CTS
| EDGEPORT_MSR_DELTA_DSR
|
2119 EDGEPORT_MSR_DELTA_RI
| EDGEPORT_MSR_DELTA_CD
)) {
2120 icount
= &edge_port
->icount
;
2122 /* update input line counters */
2123 if (newMsr
& EDGEPORT_MSR_DELTA_CTS
)
2125 if (newMsr
& EDGEPORT_MSR_DELTA_DSR
)
2127 if (newMsr
& EDGEPORT_MSR_DELTA_CD
)
2129 if (newMsr
& EDGEPORT_MSR_DELTA_RI
)
2131 wake_up_interruptible(&edge_port
->delta_msr_wait
);
2134 /* Save the new modem status */
2135 edge_port
->shadowMSR
= newMsr
& 0xf0;
2141 /*****************************************************************************
2143 * this function handles any change to the lsr register for a port.
2144 *****************************************************************************/
2145 static void handle_new_lsr(struct edgeport_port
*edge_port
, __u8 lsrData
,
2146 __u8 lsr
, __u8 data
)
2148 __u8 newLsr
= (__u8
) (lsr
& (__u8
)
2149 (LSR_OVER_ERR
| LSR_PAR_ERR
| LSR_FRM_ERR
| LSR_BREAK
));
2150 struct async_icount
*icount
;
2152 dbg("%s - %02x", __func__
, newLsr
);
2154 edge_port
->shadowLSR
= lsr
;
2156 if (newLsr
& LSR_BREAK
) {
2158 * Parity and Framing errors only count if they
2159 * occur exclusive of a break being
2162 newLsr
&= (__u8
)(LSR_OVER_ERR
| LSR_BREAK
);
2165 /* Place LSR data byte into Rx buffer */
2166 if (lsrData
&& edge_port
->port
->port
.tty
)
2167 edge_tty_recv(&edge_port
->port
->dev
,
2168 edge_port
->port
->port
.tty
, &data
, 1);
2170 /* update input line counters */
2171 icount
= &edge_port
->icount
;
2172 if (newLsr
& LSR_BREAK
)
2174 if (newLsr
& LSR_OVER_ERR
)
2176 if (newLsr
& LSR_PAR_ERR
)
2178 if (newLsr
& LSR_FRM_ERR
)
2185 /****************************************************************************
2187 * writes a number of bytes to the Edgeport device's sram starting at the
2189 * If successful returns the number of bytes written, otherwise it returns
2190 * a negative error number of the problem.
2191 ****************************************************************************/
2192 static int sram_write(struct usb_serial
*serial
, __u16 extAddr
, __u16 addr
,
2193 __u16 length
, const __u8
*data
)
2196 __u16 current_length
;
2197 unsigned char *transfer_buffer
;
2199 dbg("%s - %x, %x, %d", __func__
, extAddr
, addr
, length
);
2201 transfer_buffer
= kmalloc(64, GFP_KERNEL
);
2202 if (!transfer_buffer
) {
2203 dev_err(&serial
->dev
->dev
, "%s - kmalloc(%d) failed.\n",
2208 /* need to split these writes up into 64 byte chunks */
2210 while (length
> 0) {
2212 current_length
= 64;
2214 current_length
= length
;
2216 /* dbg("%s - writing %x, %x, %d", __func__,
2217 extAddr, addr, current_length); */
2218 memcpy(transfer_buffer
, data
, current_length
);
2219 result
= usb_control_msg(serial
->dev
,
2220 usb_sndctrlpipe(serial
->dev
, 0),
2221 USB_REQUEST_ION_WRITE_RAM
,
2222 0x40, addr
, extAddr
, transfer_buffer
,
2223 current_length
, 300);
2226 length
-= current_length
;
2227 addr
+= current_length
;
2228 data
+= current_length
;
2231 kfree(transfer_buffer
);
2236 /****************************************************************************
2238 * writes a number of bytes to the Edgeport device's ROM starting at the
2240 * If successful returns the number of bytes written, otherwise it returns
2241 * a negative error number of the problem.
2242 ****************************************************************************/
2243 static int rom_write(struct usb_serial
*serial
, __u16 extAddr
, __u16 addr
,
2244 __u16 length
, const __u8
*data
)
2247 __u16 current_length
;
2248 unsigned char *transfer_buffer
;
2250 /* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2252 transfer_buffer
= kmalloc(64, GFP_KERNEL
);
2253 if (!transfer_buffer
) {
2254 dev_err(&serial
->dev
->dev
, "%s - kmalloc(%d) failed.\n",
2259 /* need to split these writes up into 64 byte chunks */
2261 while (length
> 0) {
2263 current_length
= 64;
2265 current_length
= length
;
2266 /* dbg("%s - writing %x, %x, %d", __func__,
2267 extAddr, addr, current_length); */
2268 memcpy(transfer_buffer
, data
, current_length
);
2269 result
= usb_control_msg(serial
->dev
,
2270 usb_sndctrlpipe(serial
->dev
, 0),
2271 USB_REQUEST_ION_WRITE_ROM
, 0x40,
2273 transfer_buffer
, current_length
, 300);
2276 length
-= current_length
;
2277 addr
+= current_length
;
2278 data
+= current_length
;
2281 kfree(transfer_buffer
);
2286 /****************************************************************************
2288 * reads a number of bytes from the Edgeport device starting at the given
2290 * If successful returns the number of bytes read, otherwise it returns
2291 * a negative error number of the problem.
2292 ****************************************************************************/
2293 static int rom_read(struct usb_serial
*serial
, __u16 extAddr
,
2294 __u16 addr
, __u16 length
, __u8
*data
)
2297 __u16 current_length
;
2298 unsigned char *transfer_buffer
;
2300 dbg("%s - %x, %x, %d", __func__
, extAddr
, addr
, length
);
2302 transfer_buffer
= kmalloc(64, GFP_KERNEL
);
2303 if (!transfer_buffer
) {
2304 dev_err(&serial
->dev
->dev
,
2305 "%s - kmalloc(%d) failed.\n", __func__
, 64);
2309 /* need to split these reads up into 64 byte chunks */
2311 while (length
> 0) {
2313 current_length
= 64;
2315 current_length
= length
;
2316 /* dbg("%s - %x, %x, %d", __func__,
2317 extAddr, addr, current_length); */
2318 result
= usb_control_msg(serial
->dev
,
2319 usb_rcvctrlpipe(serial
->dev
, 0),
2320 USB_REQUEST_ION_READ_ROM
,
2321 0xC0, addr
, extAddr
, transfer_buffer
,
2322 current_length
, 300);
2325 memcpy(data
, transfer_buffer
, current_length
);
2326 length
-= current_length
;
2327 addr
+= current_length
;
2328 data
+= current_length
;
2331 kfree(transfer_buffer
);
2336 /****************************************************************************
2338 * Is used to send a IOSP message to the Edgeport device
2339 ****************************************************************************/
2340 static int send_iosp_ext_cmd(struct edgeport_port
*edge_port
,
2341 __u8 command
, __u8 param
)
2343 unsigned char *buffer
;
2344 unsigned char *currentCommand
;
2348 dbg("%s - %d, %d", __func__
, command
, param
);
2350 buffer
= kmalloc(10, GFP_ATOMIC
);
2352 dev_err(&edge_port
->port
->dev
,
2353 "%s - kmalloc(%d) failed.\n", __func__
, 10);
2357 currentCommand
= buffer
;
2359 MAKE_CMD_EXT_CMD(¤tCommand
, &length
,
2360 edge_port
->port
->number
- edge_port
->port
->serial
->minor
,
2363 status
= write_cmd_usb(edge_port
, buffer
, length
);
2365 /* something bad happened, let's free up the memory */
2373 /*****************************************************************************
2375 * this function writes the given buffer out to the bulk write endpoint.
2376 *****************************************************************************/
2377 static int write_cmd_usb(struct edgeport_port
*edge_port
,
2378 unsigned char *buffer
, int length
)
2380 struct edgeport_serial
*edge_serial
=
2381 usb_get_serial_data(edge_port
->port
->serial
);
2386 usb_serial_debug_data(debug
, &edge_port
->port
->dev
,
2387 __func__
, length
, buffer
);
2389 /* Allocate our next urb */
2390 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
2394 atomic_inc(&CmdUrbs
);
2395 dbg("%s - ALLOCATE URB %p (outstanding %d)",
2396 __func__
, urb
, atomic_read(&CmdUrbs
));
2398 usb_fill_bulk_urb(urb
, edge_serial
->serial
->dev
,
2399 usb_sndbulkpipe(edge_serial
->serial
->dev
,
2400 edge_serial
->bulk_out_endpoint
),
2401 buffer
, length
, edge_bulk_out_cmd_callback
, edge_port
);
2403 edge_port
->commandPending
= true;
2404 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
2407 /* something went wrong */
2408 dev_err(&edge_port
->port
->dev
,
2409 "%s - usb_submit_urb(write command) failed, status = %d\n",
2413 atomic_dec(&CmdUrbs
);
2417 /* wait for command to finish */
2418 timeout
= COMMAND_TIMEOUT
;
2420 wait_event(&edge_port
->wait_command
, !edge_port
->commandPending
);
2422 if (edge_port
->commandPending
) {
2423 /* command timed out */
2424 dbg("%s - command timed out", __func__
);
2432 /*****************************************************************************
2433 * send_cmd_write_baud_rate
2434 * this function sends the proper command to change the baud rate of the
2436 *****************************************************************************/
2437 static int send_cmd_write_baud_rate(struct edgeport_port
*edge_port
,
2440 struct edgeport_serial
*edge_serial
=
2441 usb_get_serial_data(edge_port
->port
->serial
);
2442 unsigned char *cmdBuffer
;
2443 unsigned char *currCmd
;
2447 unsigned char number
=
2448 edge_port
->port
->number
- edge_port
->port
->serial
->minor
;
2450 if (edge_serial
->is_epic
&&
2451 !edge_serial
->epic_descriptor
.Supports
.IOSPSetBaudRate
) {
2452 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2453 edge_port
->port
->number
, baudRate
);
2457 dbg("%s - port = %d, baud = %d", __func__
,
2458 edge_port
->port
->number
, baudRate
);
2460 status
= calc_baud_rate_divisor(baudRate
, &divisor
);
2462 dev_err(&edge_port
->port
->dev
, "%s - bad baud rate\n",
2467 /* Alloc memory for the string of commands. */
2468 cmdBuffer
= kmalloc(0x100, GFP_ATOMIC
);
2470 dev_err(&edge_port
->port
->dev
,
2471 "%s - kmalloc(%d) failed.\n", __func__
, 0x100);
2474 currCmd
= cmdBuffer
;
2476 /* Enable access to divisor latch */
2477 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, LCR
, LCR_DL_ENABLE
);
2479 /* Write the divisor itself */
2480 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, DLL
, LOW8(divisor
));
2481 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, DLM
, HIGH8(divisor
));
2483 /* Restore original value to disable access to divisor latch */
2484 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
, number
, LCR
,
2485 edge_port
->shadowLCR
);
2487 status
= write_cmd_usb(edge_port
, cmdBuffer
, cmdLen
);
2489 /* something bad happened, let's free up the memory */
2497 /*****************************************************************************
2498 * calc_baud_rate_divisor
2499 * this function calculates the proper baud rate divisor for the specified
2501 *****************************************************************************/
2502 static int calc_baud_rate_divisor(int baudrate
, int *divisor
)
2508 dbg("%s - %d", __func__
, baudrate
);
2510 for (i
= 0; i
< ARRAY_SIZE(divisor_table
); i
++) {
2511 if (divisor_table
[i
].BaudRate
== baudrate
) {
2512 *divisor
= divisor_table
[i
].Divisor
;
2517 /* We have tried all of the standard baud rates
2518 * lets try to calculate the divisor for this baud rate
2519 * Make sure the baud rate is reasonable */
2520 if (baudrate
> 50 && baudrate
< 230400) {
2522 custom
= (__u16
)((230400L + baudrate
/2) / baudrate
);
2526 dbg("%s - Baud %d = %d\n", __func__
, baudrate
, custom
);
2534 /*****************************************************************************
2535 * send_cmd_write_uart_register
2536 * this function builds up a uart register message and sends to to the device.
2537 *****************************************************************************/
2538 static int send_cmd_write_uart_register(struct edgeport_port
*edge_port
,
2539 __u8 regNum
, __u8 regValue
)
2541 struct edgeport_serial
*edge_serial
=
2542 usb_get_serial_data(edge_port
->port
->serial
);
2543 unsigned char *cmdBuffer
;
2544 unsigned char *currCmd
;
2545 unsigned long cmdLen
= 0;
2548 dbg("%s - write to %s register 0x%02x",
2549 (regNum
== MCR
) ? "MCR" : "LCR", __func__
, regValue
);
2551 if (edge_serial
->is_epic
&&
2552 !edge_serial
->epic_descriptor
.Supports
.IOSPWriteMCR
&&
2554 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2558 if (edge_serial
->is_epic
&&
2559 !edge_serial
->epic_descriptor
.Supports
.IOSPWriteLCR
&&
2561 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2565 /* Alloc memory for the string of commands. */
2566 cmdBuffer
= kmalloc(0x10, GFP_ATOMIC
);
2567 if (cmdBuffer
== NULL
)
2570 currCmd
= cmdBuffer
;
2572 /* Build a cmd in the buffer to write the given register */
2573 MAKE_CMD_WRITE_REG(&currCmd
, &cmdLen
,
2574 edge_port
->port
->number
- edge_port
->port
->serial
->minor
,
2577 status
= write_cmd_usb(edge_port
, cmdBuffer
, cmdLen
);
2579 /* something bad happened, let's free up the memory */
2587 /*****************************************************************************
2588 * change_port_settings
2589 * This routine is called to set the UART on the device to match the
2590 * specified new settings.
2591 *****************************************************************************/
2593 static void change_port_settings(struct tty_struct
*tty
,
2594 struct edgeport_port
*edge_port
, struct ktermios
*old_termios
)
2596 struct edgeport_serial
*edge_serial
=
2597 usb_get_serial_data(edge_port
->port
->serial
);
2608 dbg("%s - port %d", __func__
, edge_port
->port
->number
);
2610 if (!edge_port
->open
&&
2611 !edge_port
->openPending
) {
2612 dbg("%s - port not opened", __func__
);
2616 cflag
= tty
->termios
->c_cflag
;
2618 switch (cflag
& CSIZE
) {
2620 lData
= LCR_BITS_5
; mask
= 0x1f;
2621 dbg("%s - data bits = 5", __func__
);
2624 lData
= LCR_BITS_6
; mask
= 0x3f;
2625 dbg("%s - data bits = 6", __func__
);
2628 lData
= LCR_BITS_7
; mask
= 0x7f;
2629 dbg("%s - data bits = 7", __func__
);
2634 dbg("%s - data bits = 8", __func__
);
2638 lParity
= LCR_PAR_NONE
;
2639 if (cflag
& PARENB
) {
2640 if (cflag
& CMSPAR
) {
2641 if (cflag
& PARODD
) {
2642 lParity
= LCR_PAR_MARK
;
2643 dbg("%s - parity = mark", __func__
);
2645 lParity
= LCR_PAR_SPACE
;
2646 dbg("%s - parity = space", __func__
);
2648 } else if (cflag
& PARODD
) {
2649 lParity
= LCR_PAR_ODD
;
2650 dbg("%s - parity = odd", __func__
);
2652 lParity
= LCR_PAR_EVEN
;
2653 dbg("%s - parity = even", __func__
);
2656 dbg("%s - parity = none", __func__
);
2659 if (cflag
& CSTOPB
) {
2661 dbg("%s - stop bits = 2", __func__
);
2664 dbg("%s - stop bits = 1", __func__
);
2667 /* figure out the flow control settings */
2668 rxFlow
= txFlow
= 0x00;
2669 if (cflag
& CRTSCTS
) {
2670 rxFlow
|= IOSP_RX_FLOW_RTS
;
2671 txFlow
|= IOSP_TX_FLOW_CTS
;
2672 dbg("%s - RTS/CTS is enabled", __func__
);
2674 dbg("%s - RTS/CTS is disabled", __func__
);
2677 /* if we are implementing XON/XOFF, set the start and stop character
2679 if (I_IXOFF(tty
) || I_IXON(tty
)) {
2680 unsigned char stop_char
= STOP_CHAR(tty
);
2681 unsigned char start_char
= START_CHAR(tty
);
2683 if ((!edge_serial
->is_epic
) ||
2684 ((edge_serial
->is_epic
) &&
2685 (edge_serial
->epic_descriptor
.Supports
.IOSPSetXChar
))) {
2686 send_iosp_ext_cmd(edge_port
,
2687 IOSP_CMD_SET_XON_CHAR
, start_char
);
2688 send_iosp_ext_cmd(edge_port
,
2689 IOSP_CMD_SET_XOFF_CHAR
, stop_char
);
2692 /* if we are implementing INBOUND XON/XOFF */
2694 rxFlow
|= IOSP_RX_FLOW_XON_XOFF
;
2695 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2696 __func__
, start_char
, stop_char
);
2698 dbg("%s - INBOUND XON/XOFF is disabled", __func__
);
2701 /* if we are implementing OUTBOUND XON/XOFF */
2703 txFlow
|= IOSP_TX_FLOW_XON_XOFF
;
2704 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2705 __func__
, start_char
, stop_char
);
2707 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__
);
2711 /* Set flow control to the configured value */
2712 if ((!edge_serial
->is_epic
) ||
2713 ((edge_serial
->is_epic
) &&
2714 (edge_serial
->epic_descriptor
.Supports
.IOSPSetRxFlow
)))
2715 send_iosp_ext_cmd(edge_port
, IOSP_CMD_SET_RX_FLOW
, rxFlow
);
2716 if ((!edge_serial
->is_epic
) ||
2717 ((edge_serial
->is_epic
) &&
2718 (edge_serial
->epic_descriptor
.Supports
.IOSPSetTxFlow
)))
2719 send_iosp_ext_cmd(edge_port
, IOSP_CMD_SET_TX_FLOW
, txFlow
);
2722 edge_port
->shadowLCR
&= ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
2723 edge_port
->shadowLCR
|= (lData
| lParity
| lStop
);
2725 edge_port
->validDataMask
= mask
;
2727 /* Send the updated LCR value to the EdgePort */
2728 status
= send_cmd_write_uart_register(edge_port
, LCR
,
2729 edge_port
->shadowLCR
);
2733 /* set up the MCR register and send it to the EdgePort */
2734 edge_port
->shadowMCR
= MCR_MASTER_IE
;
2736 edge_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2738 status
= send_cmd_write_uart_register(edge_port
, MCR
,
2739 edge_port
->shadowMCR
);
2743 /* Determine divisor based on baud rate */
2744 baud
= tty_get_baud_rate(tty
);
2746 /* pick a default, any default... */
2750 dbg("%s - baud rate = %d", __func__
, baud
);
2751 status
= send_cmd_write_baud_rate(edge_port
, baud
);
2753 /* Speed change was not possible - put back the old speed */
2754 baud
= tty_termios_baud_rate(old_termios
);
2755 tty_encode_baud_rate(tty
, baud
, baud
);
2761 /****************************************************************************
2763 * Turns a string from Unicode into ASCII.
2764 * Doesn't do a good job with any characters that are outside the normal
2765 * ASCII range, but it's only for debugging...
2766 * NOTE: expects the unicode in LE format
2767 ****************************************************************************/
2768 static void unicode_to_ascii(char *string
, int buflen
,
2769 __le16
*unicode
, int unicode_size
)
2773 if (buflen
<= 0) /* never happens, but... */
2775 --buflen
; /* space for nul */
2777 for (i
= 0; i
< unicode_size
; i
++) {
2780 string
[i
] = (char)(le16_to_cpu(unicode
[i
]));
2786 /****************************************************************************
2787 * get_manufacturing_desc
2788 * reads in the manufacturing descriptor and stores it into the serial
2790 ****************************************************************************/
2791 static void get_manufacturing_desc(struct edgeport_serial
*edge_serial
)
2795 dbg("getting manufacturer descriptor");
2797 response
= rom_read(edge_serial
->serial
,
2798 (EDGE_MANUF_DESC_ADDR
& 0xffff0000) >> 16,
2799 (__u16
)(EDGE_MANUF_DESC_ADDR
& 0x0000ffff),
2800 EDGE_MANUF_DESC_LEN
,
2801 (__u8
*)(&edge_serial
->manuf_descriptor
));
2804 dev_err(&edge_serial
->serial
->dev
->dev
,
2805 "error in getting manufacturer descriptor\n");
2808 dbg("**Manufacturer Descriptor");
2809 dbg(" RomSize: %dK",
2810 edge_serial
->manuf_descriptor
.RomSize
);
2811 dbg(" RamSize: %dK",
2812 edge_serial
->manuf_descriptor
.RamSize
);
2814 edge_serial
->manuf_descriptor
.CpuRev
);
2815 dbg(" BoardRev: %d",
2816 edge_serial
->manuf_descriptor
.BoardRev
);
2817 dbg(" NumPorts: %d",
2818 edge_serial
->manuf_descriptor
.NumPorts
);
2819 dbg(" DescDate: %d/%d/%d",
2820 edge_serial
->manuf_descriptor
.DescDate
[0],
2821 edge_serial
->manuf_descriptor
.DescDate
[1],
2822 edge_serial
->manuf_descriptor
.DescDate
[2]+1900);
2823 unicode_to_ascii(string
, sizeof(string
),
2824 edge_serial
->manuf_descriptor
.SerialNumber
,
2825 edge_serial
->manuf_descriptor
.SerNumLength
/2);
2826 dbg(" SerialNumber: %s", string
);
2827 unicode_to_ascii(string
, sizeof(string
),
2828 edge_serial
->manuf_descriptor
.AssemblyNumber
,
2829 edge_serial
->manuf_descriptor
.AssemblyNumLength
/2);
2830 dbg(" AssemblyNumber: %s", string
);
2831 unicode_to_ascii(string
, sizeof(string
),
2832 edge_serial
->manuf_descriptor
.OemAssyNumber
,
2833 edge_serial
->manuf_descriptor
.OemAssyNumLength
/2);
2834 dbg(" OemAssyNumber: %s", string
);
2835 dbg(" UartType: %d",
2836 edge_serial
->manuf_descriptor
.UartType
);
2838 edge_serial
->manuf_descriptor
.IonPid
);
2839 dbg(" IonConfig: %d",
2840 edge_serial
->manuf_descriptor
.IonConfig
);
2845 /****************************************************************************
2847 * reads in the bootloader descriptor and stores it into the serial
2849 ****************************************************************************/
2850 static void get_boot_desc(struct edgeport_serial
*edge_serial
)
2854 dbg("getting boot descriptor");
2856 response
= rom_read(edge_serial
->serial
,
2857 (EDGE_BOOT_DESC_ADDR
& 0xffff0000) >> 16,
2858 (__u16
)(EDGE_BOOT_DESC_ADDR
& 0x0000ffff),
2860 (__u8
*)(&edge_serial
->boot_descriptor
));
2863 dev_err(&edge_serial
->serial
->dev
->dev
,
2864 "error in getting boot descriptor\n");
2866 dbg("**Boot Descriptor:");
2867 dbg(" BootCodeLength: %d",
2868 le16_to_cpu(edge_serial
->boot_descriptor
.BootCodeLength
));
2869 dbg(" MajorVersion: %d",
2870 edge_serial
->boot_descriptor
.MajorVersion
);
2871 dbg(" MinorVersion: %d",
2872 edge_serial
->boot_descriptor
.MinorVersion
);
2873 dbg(" BuildNumber: %d",
2874 le16_to_cpu(edge_serial
->boot_descriptor
.BuildNumber
));
2875 dbg(" Capabilities: 0x%x",
2876 le16_to_cpu(edge_serial
->boot_descriptor
.Capabilities
));
2877 dbg(" UConfig0: %d",
2878 edge_serial
->boot_descriptor
.UConfig0
);
2879 dbg(" UConfig1: %d",
2880 edge_serial
->boot_descriptor
.UConfig1
);
2885 /****************************************************************************
2886 * load_application_firmware
2887 * This is called to load the application firmware to the device
2888 ****************************************************************************/
2889 static void load_application_firmware(struct edgeport_serial
*edge_serial
)
2891 const struct ihex_binrec
*rec
;
2892 const struct firmware
*fw
;
2893 const char *fw_name
;
2894 const char *fw_info
;
2899 switch (edge_serial
->product_info
.iDownloadFile
) {
2900 case EDGE_DOWNLOAD_FILE_I930
:
2901 fw_info
= "downloading firmware version (930)";
2902 fw_name
= "edgeport/down.fw";
2905 case EDGE_DOWNLOAD_FILE_80251
:
2906 fw_info
= "downloading firmware version (80251)";
2907 fw_name
= "edgeport/down2.fw";
2910 case EDGE_DOWNLOAD_FILE_NONE
:
2911 dbg ("No download file specified, skipping download\n");
2918 response
= request_ihex_firmware(&fw
, fw_name
,
2919 &edge_serial
->serial
->dev
->dev
);
2921 printk(KERN_ERR
"Failed to load image \"%s\" err %d\n",
2926 rec
= (const struct ihex_binrec
*)fw
->data
;
2927 build
= (rec
->data
[2] << 8) | rec
->data
[3];
2929 dbg("%s %d.%d.%d", fw_info
, rec
->data
[0], rec
->data
[1], build
);
2931 edge_serial
->product_info
.FirmwareMajorVersion
= fw
->data
[0];
2932 edge_serial
->product_info
.FirmwareMinorVersion
= fw
->data
[1];
2933 edge_serial
->product_info
.FirmwareBuildNumber
= cpu_to_le16(build
);
2935 for (rec
= ihex_next_binrec(rec
); rec
;
2936 rec
= ihex_next_binrec(rec
)) {
2937 Operaddr
= be32_to_cpu(rec
->addr
);
2938 response
= sram_write(edge_serial
->serial
,
2941 be16_to_cpu(rec
->len
),
2944 dev_err(&edge_serial
->serial
->dev
->dev
,
2945 "sram_write failed (%x, %x, %d)\n",
2946 Operaddr
>> 16, Operaddr
& 0xFFFF,
2947 be16_to_cpu(rec
->len
));
2952 dbg("sending exec_dl_code");
2953 response
= usb_control_msg (edge_serial
->serial
->dev
,
2954 usb_sndctrlpipe(edge_serial
->serial
->dev
, 0),
2955 USB_REQUEST_ION_EXEC_DL_CODE
,
2956 0x40, 0x4000, 0x0001, NULL
, 0, 3000);
2958 release_firmware(fw
);
2963 /****************************************************************************
2965 ****************************************************************************/
2966 static int edge_startup(struct usb_serial
*serial
)
2968 struct edgeport_serial
*edge_serial
;
2969 struct edgeport_port
*edge_port
;
2970 struct usb_device
*dev
;
2973 bool interrupt_in_found
;
2975 bool bulk_out_found
;
2976 static __u32 descriptor
[3] = { EDGE_COMPATIBILITY_MASK0
,
2977 EDGE_COMPATIBILITY_MASK1
,
2978 EDGE_COMPATIBILITY_MASK2
};
2982 /* create our private serial structure */
2983 edge_serial
= kzalloc(sizeof(struct edgeport_serial
), GFP_KERNEL
);
2984 if (edge_serial
== NULL
) {
2985 dev_err(&serial
->dev
->dev
, "%s - Out of memory\n", __func__
);
2988 spin_lock_init(&edge_serial
->es_lock
);
2989 edge_serial
->serial
= serial
;
2990 usb_set_serial_data(serial
, edge_serial
);
2992 /* get the name for the device from the device */
2993 i
= get_string(dev
, dev
->descriptor
.iManufacturer
,
2994 &edge_serial
->name
[0], MAX_NAME_LEN
+1);
2995 edge_serial
->name
[i
++] = ' ';
2996 get_string(dev
, dev
->descriptor
.iProduct
,
2997 &edge_serial
->name
[i
], MAX_NAME_LEN
+2 - i
);
2999 dev_info(&serial
->dev
->dev
, "%s detected\n", edge_serial
->name
);
3001 /* Read the epic descriptor */
3002 if (get_epic_descriptor(edge_serial
) <= 0) {
3003 /* memcpy descriptor to Supports structures */
3004 memcpy(&edge_serial
->epic_descriptor
.Supports
, descriptor
,
3005 sizeof(struct edge_compatibility_bits
));
3007 /* get the manufacturing descriptor for this device */
3008 get_manufacturing_desc(edge_serial
);
3010 /* get the boot descriptor */
3011 get_boot_desc(edge_serial
);
3013 get_product_info(edge_serial
);
3016 /* set the number of ports from the manufacturing description */
3017 /* serial->num_ports = serial->product_info.NumPorts; */
3018 if ((!edge_serial
->is_epic
) &&
3019 (edge_serial
->product_info
.NumPorts
!= serial
->num_ports
)) {
3020 dev_warn(&serial
->dev
->dev
, "Device Reported %d serial ports "
3021 "vs. core thinking we have %d ports, email "
3022 "greg@kroah.com this information.\n",
3023 edge_serial
->product_info
.NumPorts
,
3027 dbg("%s - time 1 %ld", __func__
, jiffies
);
3029 /* If not an EPiC device */
3030 if (!edge_serial
->is_epic
) {
3031 /* now load the application firmware into this device */
3032 load_application_firmware(edge_serial
);
3034 dbg("%s - time 2 %ld", __func__
, jiffies
);
3036 /* Check current Edgeport EEPROM and update if necessary */
3037 update_edgeport_E2PROM(edge_serial
);
3039 dbg("%s - time 3 %ld", __func__
, jiffies
);
3041 /* set the configuration to use #1 */
3042 /* dbg("set_configuration 1"); */
3043 /* usb_set_configuration (dev, 1); */
3045 dbg(" FirmwareMajorVersion %d.%d.%d",
3046 edge_serial
->product_info
.FirmwareMajorVersion
,
3047 edge_serial
->product_info
.FirmwareMinorVersion
,
3048 le16_to_cpu(edge_serial
->product_info
.FirmwareBuildNumber
));
3050 /* we set up the pointers to the endpoints in the edge_open function,
3051 * as the structures aren't created yet. */
3053 /* set up our port private structures */
3054 for (i
= 0; i
< serial
->num_ports
; ++i
) {
3055 edge_port
= kmalloc(sizeof(struct edgeport_port
), GFP_KERNEL
);
3056 if (edge_port
== NULL
) {
3057 dev_err(&serial
->dev
->dev
, "%s - Out of memory\n",
3059 for (j
= 0; j
< i
; ++j
) {
3060 kfree(usb_get_serial_port_data(serial
->port
[j
]));
3061 usb_set_serial_port_data(serial
->port
[j
],
3064 usb_set_serial_data(serial
, NULL
);
3068 memset(edge_port
, 0, sizeof(struct edgeport_port
));
3069 spin_lock_init(&edge_port
->ep_lock
);
3070 edge_port
->port
= serial
->port
[i
];
3071 usb_set_serial_port_data(serial
->port
[i
], edge_port
);
3076 if (edge_serial
->is_epic
) {
3077 /* EPIC thing, set up our interrupt polling now and our read
3078 * urb, so that the device knows it really is connected. */
3079 interrupt_in_found
= bulk_in_found
= bulk_out_found
= false;
3080 for (i
= 0; i
< serial
->interface
->altsetting
[0]
3081 .desc
.bNumEndpoints
; ++i
) {
3082 struct usb_endpoint_descriptor
*endpoint
;
3085 endpoint
= &serial
->interface
->altsetting
[0].
3087 buffer_size
= le16_to_cpu(endpoint
->wMaxPacketSize
);
3088 if (!interrupt_in_found
&&
3089 (usb_endpoint_is_int_in(endpoint
))) {
3090 /* we found a interrupt in endpoint */
3091 dbg("found interrupt in");
3093 /* not set up yet, so do it now */
3094 edge_serial
->interrupt_read_urb
=
3095 usb_alloc_urb(0, GFP_KERNEL
);
3096 if (!edge_serial
->interrupt_read_urb
) {
3097 err("out of memory");
3100 edge_serial
->interrupt_in_buffer
=
3101 kmalloc(buffer_size
, GFP_KERNEL
);
3102 if (!edge_serial
->interrupt_in_buffer
) {
3103 err("out of memory");
3104 usb_free_urb(edge_serial
->interrupt_read_urb
);
3107 edge_serial
->interrupt_in_endpoint
=
3108 endpoint
->bEndpointAddress
;
3110 /* set up our interrupt urb */
3112 edge_serial
->interrupt_read_urb
,
3115 endpoint
->bEndpointAddress
),
3116 edge_serial
->interrupt_in_buffer
,
3118 edge_interrupt_callback
,
3120 endpoint
->bInterval
);
3122 interrupt_in_found
= true;
3125 if (!bulk_in_found
&&
3126 (usb_endpoint_is_bulk_in(endpoint
))) {
3127 /* we found a bulk in endpoint */
3128 dbg("found bulk in");
3130 /* not set up yet, so do it now */
3131 edge_serial
->read_urb
=
3132 usb_alloc_urb(0, GFP_KERNEL
);
3133 if (!edge_serial
->read_urb
) {
3134 err("out of memory");
3137 edge_serial
->bulk_in_buffer
=
3138 kmalloc(buffer_size
, GFP_KERNEL
);
3139 if (!edge_serial
->bulk_in_buffer
) {
3140 err("out of memory");
3141 usb_free_urb(edge_serial
->read_urb
);
3144 edge_serial
->bulk_in_endpoint
=
3145 endpoint
->bEndpointAddress
;
3147 /* set up our bulk in urb */
3148 usb_fill_bulk_urb(edge_serial
->read_urb
, dev
,
3149 usb_rcvbulkpipe(dev
,
3150 endpoint
->bEndpointAddress
),
3151 edge_serial
->bulk_in_buffer
,
3152 le16_to_cpu(endpoint
->wMaxPacketSize
),
3153 edge_bulk_in_callback
,
3155 bulk_in_found
= true;
3158 if (!bulk_out_found
&&
3159 (usb_endpoint_is_bulk_out(endpoint
))) {
3160 /* we found a bulk out endpoint */
3161 dbg("found bulk out");
3162 edge_serial
->bulk_out_endpoint
=
3163 endpoint
->bEndpointAddress
;
3164 bulk_out_found
= true;
3168 if (!interrupt_in_found
|| !bulk_in_found
|| !bulk_out_found
) {
3169 err("Error - the proper endpoints were not found!");
3173 /* start interrupt read for this edgeport this interrupt will
3174 * continue as long as the edgeport is connected */
3175 response
= usb_submit_urb(edge_serial
->interrupt_read_urb
,
3178 err("%s - Error %d submitting control urb",
3179 __func__
, response
);
3185 /****************************************************************************
3187 * This function is called whenever the device is removed from the usb bus.
3188 ****************************************************************************/
3189 static void edge_shutdown(struct usb_serial
*serial
)
3191 struct edgeport_serial
*edge_serial
= usb_get_serial_data(serial
);
3194 dbg("%s", __func__
);
3196 /* stop reads and writes on all ports */
3197 for (i
= 0; i
< serial
->num_ports
; ++i
) {
3198 kfree(usb_get_serial_port_data(serial
->port
[i
]));
3199 usb_set_serial_port_data(serial
->port
[i
], NULL
);
3201 /* free up our endpoint stuff */
3202 if (edge_serial
->is_epic
) {
3203 usb_kill_urb(edge_serial
->interrupt_read_urb
);
3204 usb_free_urb(edge_serial
->interrupt_read_urb
);
3205 kfree(edge_serial
->interrupt_in_buffer
);
3207 usb_kill_urb(edge_serial
->read_urb
);
3208 usb_free_urb(edge_serial
->read_urb
);
3209 kfree(edge_serial
->bulk_in_buffer
);
3213 usb_set_serial_data(serial
, NULL
);
3217 /****************************************************************************
3219 * This is called by the module subsystem, or on startup to initialize us
3220 ****************************************************************************/
3221 static int __init
edgeport_init(void)
3225 retval
= usb_serial_register(&edgeport_2port_device
);
3227 goto failed_2port_device_register
;
3228 retval
= usb_serial_register(&edgeport_4port_device
);
3230 goto failed_4port_device_register
;
3231 retval
= usb_serial_register(&edgeport_8port_device
);
3233 goto failed_8port_device_register
;
3234 retval
= usb_serial_register(&epic_device
);
3236 goto failed_epic_device_register
;
3237 retval
= usb_register(&io_driver
);
3239 goto failed_usb_register
;
3240 atomic_set(&CmdUrbs
, 0);
3241 info(DRIVER_DESC
" " DRIVER_VERSION
);
3244 failed_usb_register
:
3245 usb_serial_deregister(&epic_device
);
3246 failed_epic_device_register
:
3247 usb_serial_deregister(&edgeport_8port_device
);
3248 failed_8port_device_register
:
3249 usb_serial_deregister(&edgeport_4port_device
);
3250 failed_4port_device_register
:
3251 usb_serial_deregister(&edgeport_2port_device
);
3252 failed_2port_device_register
:
3257 /****************************************************************************
3259 * Called when the driver is about to be unloaded.
3260 ****************************************************************************/
3261 static void __exit
edgeport_exit (void)
3263 usb_deregister(&io_driver
);
3264 usb_serial_deregister(&edgeport_2port_device
);
3265 usb_serial_deregister(&edgeport_4port_device
);
3266 usb_serial_deregister(&edgeport_8port_device
);
3267 usb_serial_deregister(&epic_device
);
3270 module_init(edgeport_init
);
3271 module_exit(edgeport_exit
);
3273 /* Module information */
3274 MODULE_AUTHOR(DRIVER_AUTHOR
);
3275 MODULE_DESCRIPTION(DRIVER_DESC
);
3276 MODULE_LICENSE("GPL");
3277 MODULE_FIRMWARE("edgeport/boot.fw");
3278 MODULE_FIRMWARE("edgeport/boot2.fw");
3279 MODULE_FIRMWARE("edgeport/down.fw");
3280 MODULE_FIRMWARE("edgeport/down2.fw");
3282 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
3283 MODULE_PARM_DESC(debug
, "Debug enabled or not");
3285 module_param(low_latency
, bool, S_IRUGO
| S_IWUSR
);
3286 MODULE_PARM_DESC(low_latency
, "Low latency enabled or not");