3 * Controls the Moschip 7720 usb to dual port serial convertor
5 * Copyright 2006 Moschip Semiconductor Tech. Ltd.
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, version 2 of the License.
12 * Vijaya Kumar <vijaykumar.gn@gmail.com>
13 * Ajay Kumar <naanuajay@yahoo.com>
14 * Gurudeva <ngurudeva@yahoo.com>
16 * Cleaned up from the original by:
17 * Greg Kroah-Hartman <gregkh@suse.de>
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
23 #include <linux/kernel.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/tty.h>
28 #include <linux/tty_driver.h>
29 #include <linux/tty_flip.h>
30 #include <linux/module.h>
31 #include <linux/spinlock.h>
32 #include <linux/serial.h>
33 #include <linux/serial_reg.h>
34 #include <linux/usb.h>
35 #include <linux/usb/serial.h>
36 #include <linux/uaccess.h>
37 #include <linux/parport.h>
42 #define DRIVER_VERSION "2.1"
43 #define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
44 #define DRIVER_DESC "Moschip USB Serial Driver"
46 /* default urb timeout */
47 #define MOS_WDR_TIMEOUT (HZ * 5)
49 #define MOS_MAX_PORT 0x02
50 #define MOS_WRITE 0x0E
53 /* Interrupt Rotinue Defines */
54 #define SERIAL_IIR_RLS 0x06
55 #define SERIAL_IIR_RDA 0x04
56 #define SERIAL_IIR_CTI 0x0c
57 #define SERIAL_IIR_THR 0x02
58 #define SERIAL_IIR_MS 0x00
60 #define NUM_URBS 16 /* URB Count */
61 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
63 /* This structure holds all of the local serial port information */
65 __u8 shadowLCR
; /* last LCR value received */
66 __u8 shadowMCR
; /* last MCR value received */
67 __u8 shadowMSR
; /* last MSR value received */
69 struct async_icount icount
;
70 struct usb_serial_port
*port
; /* loop back to the owner */
71 struct urb
*write_urb_pool
[NUM_URBS
];
76 static struct usb_serial_driver moschip7720_2port_driver
;
78 #define USB_VENDOR_ID_MOSCHIP 0x9710
79 #define MOSCHIP_DEVICE_ID_7720 0x7720
80 #define MOSCHIP_DEVICE_ID_7715 0x7715
82 static const struct usb_device_id moschip_port_id_table
[] = {
83 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7720
) },
84 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7715
) },
85 { } /* terminating entry */
87 MODULE_DEVICE_TABLE(usb
, moschip_port_id_table
);
89 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
91 /* initial values for parport regs */
92 #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */
93 #define ECR_INIT_VAL 0x00 /* SPP mode */
96 struct mos7715_parport
*mos_parport
;
97 struct list_head urblist_entry
;
98 struct kref ref_count
;
102 enum mos7715_pp_modes
{
104 PS2
= 1<<5, /* moschip calls this 'NIBBLE' mode */
105 PPF
= 2<<5, /* moschip calls this 'CB-FIFO mode */
108 struct mos7715_parport
{
109 struct parport
*pp
; /* back to containing struct */
110 struct kref ref_count
; /* to instance of this struct */
111 struct list_head deferred_urbs
; /* list deferred async urbs */
112 struct list_head active_urbs
; /* list async urbs in flight */
113 spinlock_t listlock
; /* protects list access */
114 bool msg_pending
; /* usb sync call pending */
115 struct completion syncmsg_compl
; /* usb sync call completed */
116 struct tasklet_struct urb_tasklet
; /* for sending deferred urbs */
117 struct usb_serial
*serial
; /* back to containing struct */
118 __u8 shadowECR
; /* parallel port regs... */
120 atomic_t shadowDSR
; /* updated in int-in callback */
123 /* lock guards against dereferencing NULL ptr in parport ops callbacks */
124 static DEFINE_SPINLOCK(release_lock
);
126 #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
128 static const unsigned int dummy
; /* for clarity in register access fns */
131 THR
, /* serial port regs */
143 DPR
, /* parallel port regs */
147 SP1_REG
, /* device control regs */
148 SP2_REG
, /* serial port 2 (7720 only) */
154 * Return the correct value for the Windex field of the setup packet
155 * for a control endpoint message. See the 7715 datasheet.
157 static inline __u16
get_reg_index(enum mos_regs reg
)
159 static const __u16 mos7715_index_lookup_table
[] = {
177 0x02, /* SP2_REG (7720 only) */
178 0x04, /* PP_REG (7715 only) */
179 0x08, /* SP_CONTROL_REG */
181 return mos7715_index_lookup_table
[reg
];
185 * Return the correct value for the upper byte of the Wvalue field of
186 * the setup packet for a control endpoint message.
188 static inline __u16
get_reg_value(enum mos_regs reg
,
189 unsigned int serial_portnum
)
191 if (reg
>= SP1_REG
) /* control reg */
194 else if (reg
>= DPR
) /* parallel port reg (7715 only) */
197 else /* serial port reg */
198 return (serial_portnum
+ 2) << 8;
202 * Write data byte to the specified device register. The data is embedded in
203 * the value field of the setup packet. serial_portnum is ignored for registers
204 * not specific to a particular serial port.
206 static int write_mos_reg(struct usb_serial
*serial
, unsigned int serial_portnum
,
207 enum mos_regs reg
, __u8 data
)
209 struct usb_device
*usbdev
= serial
->dev
;
210 unsigned int pipe
= usb_sndctrlpipe(usbdev
, 0);
211 __u8 request
= (__u8
)0x0e;
212 __u8 requesttype
= (__u8
)0x40;
213 __u16 index
= get_reg_index(reg
);
214 __u16 value
= get_reg_value(reg
, serial_portnum
) + data
;
215 int status
= usb_control_msg(usbdev
, pipe
, request
, requesttype
, value
,
216 index
, NULL
, 0, MOS_WDR_TIMEOUT
);
218 dev_err(&usbdev
->dev
,
219 "mos7720: usb_control_msg() failed: %d", status
);
224 * Read data byte from the specified device register. The data returned by the
225 * device is embedded in the value field of the setup packet. serial_portnum is
226 * ignored for registers that are not specific to a particular serial port.
228 static int read_mos_reg(struct usb_serial
*serial
, unsigned int serial_portnum
,
229 enum mos_regs reg
, __u8
*data
)
231 struct usb_device
*usbdev
= serial
->dev
;
232 unsigned int pipe
= usb_rcvctrlpipe(usbdev
, 0);
233 __u8 request
= (__u8
)0x0d;
234 __u8 requesttype
= (__u8
)0xc0;
235 __u16 index
= get_reg_index(reg
);
236 __u16 value
= get_reg_value(reg
, serial_portnum
);
237 int status
= usb_control_msg(usbdev
, pipe
, request
, requesttype
, value
,
238 index
, data
, 1, MOS_WDR_TIMEOUT
);
240 dev_err(&usbdev
->dev
,
241 "mos7720: usb_control_msg() failed: %d", status
);
245 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
247 static inline int mos7715_change_mode(struct mos7715_parport
*mos_parport
,
248 enum mos7715_pp_modes mode
)
250 mos_parport
->shadowECR
= mode
;
251 write_mos_reg(mos_parport
->serial
, dummy
, ECR
, mos_parport
->shadowECR
);
255 static void destroy_mos_parport(struct kref
*kref
)
257 struct mos7715_parport
*mos_parport
=
258 container_of(kref
, struct mos7715_parport
, ref_count
);
260 dbg("%s called", __func__
);
264 static void destroy_urbtracker(struct kref
*kref
)
266 struct urbtracker
*urbtrack
=
267 container_of(kref
, struct urbtracker
, ref_count
);
268 struct mos7715_parport
*mos_parport
= urbtrack
->mos_parport
;
269 dbg("%s called", __func__
);
270 usb_free_urb(urbtrack
->urb
);
272 kref_put(&mos_parport
->ref_count
, destroy_mos_parport
);
276 * This runs as a tasklet when sending an urb in a non-blocking parallel
277 * port callback had to be deferred because the disconnect mutex could not be
278 * obtained at the time.
280 static void send_deferred_urbs(unsigned long _mos_parport
)
284 struct mos7715_parport
*mos_parport
= (void *)_mos_parport
;
285 struct urbtracker
*urbtrack
;
286 struct list_head
*cursor
, *next
;
288 dbg("%s called", __func__
);
290 /* if release function ran, game over */
291 if (unlikely(mos_parport
->serial
== NULL
))
294 /* try again to get the mutex */
295 if (!mutex_trylock(&mos_parport
->serial
->disc_mutex
)) {
296 dbg("%s: rescheduling tasklet", __func__
);
297 tasklet_schedule(&mos_parport
->urb_tasklet
);
301 /* if device disconnected, game over */
302 if (unlikely(mos_parport
->serial
->disconnected
)) {
303 mutex_unlock(&mos_parport
->serial
->disc_mutex
);
307 spin_lock_irqsave(&mos_parport
->listlock
, flags
);
308 if (list_empty(&mos_parport
->deferred_urbs
)) {
309 spin_unlock_irqrestore(&mos_parport
->listlock
, flags
);
310 mutex_unlock(&mos_parport
->serial
->disc_mutex
);
311 dbg("%s: deferred_urbs list empty", __func__
);
315 /* move contents of deferred_urbs list to active_urbs list and submit */
316 list_for_each_safe(cursor
, next
, &mos_parport
->deferred_urbs
)
317 list_move_tail(cursor
, &mos_parport
->active_urbs
);
318 list_for_each_entry(urbtrack
, &mos_parport
->active_urbs
,
320 ret_val
= usb_submit_urb(urbtrack
->urb
, GFP_ATOMIC
);
321 dbg("%s: urb submitted", __func__
);
323 dev_err(&mos_parport
->serial
->dev
->dev
,
324 "usb_submit_urb() failed: %d", ret_val
);
325 list_del(&urbtrack
->urblist_entry
);
326 kref_put(&urbtrack
->ref_count
, destroy_urbtracker
);
329 spin_unlock_irqrestore(&mos_parport
->listlock
, flags
);
330 mutex_unlock(&mos_parport
->serial
->disc_mutex
);
333 /* callback for parallel port control urbs submitted asynchronously */
334 static void async_complete(struct urb
*urb
)
336 struct urbtracker
*urbtrack
= urb
->context
;
337 int status
= urb
->status
;
338 dbg("%s called", __func__
);
339 if (unlikely(status
))
340 dbg("%s - nonzero urb status received: %d", __func__
, status
);
342 /* remove the urbtracker from the active_urbs list */
343 spin_lock(&urbtrack
->mos_parport
->listlock
);
344 list_del(&urbtrack
->urblist_entry
);
345 spin_unlock(&urbtrack
->mos_parport
->listlock
);
346 kref_put(&urbtrack
->ref_count
, destroy_urbtracker
);
349 static int write_parport_reg_nonblock(struct mos7715_parport
*mos_parport
,
350 enum mos_regs reg
, __u8 data
)
352 struct urbtracker
*urbtrack
;
355 struct usb_ctrlrequest setup
;
356 struct usb_serial
*serial
= mos_parport
->serial
;
357 struct usb_device
*usbdev
= serial
->dev
;
358 dbg("%s called", __func__
);
360 /* create and initialize the control urb and containing urbtracker */
361 urbtrack
= kmalloc(sizeof(struct urbtracker
), GFP_ATOMIC
);
362 if (urbtrack
== NULL
) {
363 dev_err(&usbdev
->dev
, "out of memory");
366 kref_get(&mos_parport
->ref_count
);
367 urbtrack
->mos_parport
= mos_parport
;
368 urbtrack
->urb
= usb_alloc_urb(0, GFP_ATOMIC
);
369 if (urbtrack
->urb
== NULL
) {
370 dev_err(&usbdev
->dev
, "out of urbs");
374 setup
.bRequestType
= (__u8
)0x40;
375 setup
.bRequest
= (__u8
)0x0e;
376 setup
.wValue
= get_reg_value(reg
, dummy
);
377 setup
.wIndex
= get_reg_index(reg
);
379 usb_fill_control_urb(urbtrack
->urb
, usbdev
,
380 usb_sndctrlpipe(usbdev
, 0),
381 (unsigned char *)&setup
,
382 NULL
, 0, async_complete
, urbtrack
);
383 kref_init(&urbtrack
->ref_count
);
384 INIT_LIST_HEAD(&urbtrack
->urblist_entry
);
387 * get the disconnect mutex, or add tracker to the deferred_urbs list
388 * and schedule a tasklet to try again later
390 if (!mutex_trylock(&serial
->disc_mutex
)) {
391 spin_lock_irqsave(&mos_parport
->listlock
, flags
);
392 list_add_tail(&urbtrack
->urblist_entry
,
393 &mos_parport
->deferred_urbs
);
394 spin_unlock_irqrestore(&mos_parport
->listlock
, flags
);
395 tasklet_schedule(&mos_parport
->urb_tasklet
);
396 dbg("tasklet scheduled");
400 /* bail if device disconnected */
401 if (serial
->disconnected
) {
402 kref_put(&urbtrack
->ref_count
, destroy_urbtracker
);
403 mutex_unlock(&serial
->disc_mutex
);
407 /* add the tracker to the active_urbs list and submit */
408 spin_lock_irqsave(&mos_parport
->listlock
, flags
);
409 list_add_tail(&urbtrack
->urblist_entry
, &mos_parport
->active_urbs
);
410 spin_unlock_irqrestore(&mos_parport
->listlock
, flags
);
411 ret_val
= usb_submit_urb(urbtrack
->urb
, GFP_ATOMIC
);
412 mutex_unlock(&serial
->disc_mutex
);
414 dev_err(&usbdev
->dev
,
415 "%s: submit_urb() failed: %d", __func__
, ret_val
);
416 spin_lock_irqsave(&mos_parport
->listlock
, flags
);
417 list_del(&urbtrack
->urblist_entry
);
418 spin_unlock_irqrestore(&mos_parport
->listlock
, flags
);
419 kref_put(&urbtrack
->ref_count
, destroy_urbtracker
);
426 * This is the the common top part of all parallel port callback operations that
427 * send synchronous messages to the device. This implements convoluted locking
428 * that avoids two scenarios: (1) a port operation is called after usbserial
429 * has called our release function, at which point struct mos7715_parport has
430 * been destroyed, and (2) the device has been disconnected, but usbserial has
431 * not called the release function yet because someone has a serial port open.
432 * The shared release_lock prevents the first, and the mutex and disconnected
433 * flag maintained by usbserial covers the second. We also use the msg_pending
434 * flag to ensure that all synchronous usb messgage calls have completed before
435 * our release function can return.
437 static int parport_prologue(struct parport
*pp
)
439 struct mos7715_parport
*mos_parport
;
441 spin_lock(&release_lock
);
442 mos_parport
= pp
->private_data
;
443 if (unlikely(mos_parport
== NULL
)) {
444 /* release fn called, port struct destroyed */
445 spin_unlock(&release_lock
);
448 mos_parport
->msg_pending
= true; /* synch usb call pending */
449 INIT_COMPLETION(mos_parport
->syncmsg_compl
);
450 spin_unlock(&release_lock
);
452 mutex_lock(&mos_parport
->serial
->disc_mutex
);
453 if (mos_parport
->serial
->disconnected
) {
454 /* device disconnected */
455 mutex_unlock(&mos_parport
->serial
->disc_mutex
);
456 mos_parport
->msg_pending
= false;
457 complete(&mos_parport
->syncmsg_compl
);
465 * This is the the common bottom part of all parallel port functions that send
466 * synchronous messages to the device.
468 static inline void parport_epilogue(struct parport
*pp
)
470 struct mos7715_parport
*mos_parport
= pp
->private_data
;
471 mutex_unlock(&mos_parport
->serial
->disc_mutex
);
472 mos_parport
->msg_pending
= false;
473 complete(&mos_parport
->syncmsg_compl
);
476 static void parport_mos7715_write_data(struct parport
*pp
, unsigned char d
)
478 struct mos7715_parport
*mos_parport
= pp
->private_data
;
479 dbg("%s called: %2.2x", __func__
, d
);
480 if (parport_prologue(pp
) < 0)
482 mos7715_change_mode(mos_parport
, SPP
);
483 write_mos_reg(mos_parport
->serial
, dummy
, DPR
, (__u8
)d
);
484 parport_epilogue(pp
);
487 static unsigned char parport_mos7715_read_data(struct parport
*pp
)
489 struct mos7715_parport
*mos_parport
= pp
->private_data
;
491 dbg("%s called", __func__
);
492 if (parport_prologue(pp
) < 0)
494 read_mos_reg(mos_parport
->serial
, dummy
, DPR
, &d
);
495 parport_epilogue(pp
);
499 static void parport_mos7715_write_control(struct parport
*pp
, unsigned char d
)
501 struct mos7715_parport
*mos_parport
= pp
->private_data
;
503 dbg("%s called: %2.2x", __func__
, d
);
504 if (parport_prologue(pp
) < 0)
506 data
= ((__u8
)d
& 0x0f) | (mos_parport
->shadowDCR
& 0xf0);
507 write_mos_reg(mos_parport
->serial
, dummy
, DCR
, data
);
508 mos_parport
->shadowDCR
= data
;
509 parport_epilogue(pp
);
512 static unsigned char parport_mos7715_read_control(struct parport
*pp
)
514 struct mos7715_parport
*mos_parport
= pp
->private_data
;
516 dbg("%s called", __func__
);
517 spin_lock(&release_lock
);
518 mos_parport
= pp
->private_data
;
519 if (unlikely(mos_parport
== NULL
)) {
520 spin_unlock(&release_lock
);
523 dcr
= mos_parport
->shadowDCR
& 0x0f;
524 spin_unlock(&release_lock
);
528 static unsigned char parport_mos7715_frob_control(struct parport
*pp
,
532 struct mos7715_parport
*mos_parport
= pp
->private_data
;
534 dbg("%s called", __func__
);
537 if (parport_prologue(pp
) < 0)
539 mos_parport
->shadowDCR
= (mos_parport
->shadowDCR
& (~mask
)) ^ val
;
540 write_mos_reg(mos_parport
->serial
, dummy
, DCR
, mos_parport
->shadowDCR
);
541 dcr
= mos_parport
->shadowDCR
& 0x0f;
542 parport_epilogue(pp
);
546 static unsigned char parport_mos7715_read_status(struct parport
*pp
)
548 unsigned char status
;
549 struct mos7715_parport
*mos_parport
= pp
->private_data
;
550 dbg("%s called", __func__
);
551 spin_lock(&release_lock
);
552 mos_parport
= pp
->private_data
;
553 if (unlikely(mos_parport
== NULL
)) { /* release called */
554 spin_unlock(&release_lock
);
557 status
= atomic_read(&mos_parport
->shadowDSR
) & 0xf8;
558 spin_unlock(&release_lock
);
562 static void parport_mos7715_enable_irq(struct parport
*pp
)
564 dbg("%s called", __func__
);
566 static void parport_mos7715_disable_irq(struct parport
*pp
)
568 dbg("%s called", __func__
);
571 static void parport_mos7715_data_forward(struct parport
*pp
)
573 struct mos7715_parport
*mos_parport
= pp
->private_data
;
574 dbg("%s called", __func__
);
575 if (parport_prologue(pp
) < 0)
577 mos7715_change_mode(mos_parport
, PS2
);
578 mos_parport
->shadowDCR
&= ~0x20;
579 write_mos_reg(mos_parport
->serial
, dummy
, DCR
, mos_parport
->shadowDCR
);
580 parport_epilogue(pp
);
583 static void parport_mos7715_data_reverse(struct parport
*pp
)
585 struct mos7715_parport
*mos_parport
= pp
->private_data
;
586 dbg("%s called", __func__
);
587 if (parport_prologue(pp
) < 0)
589 mos7715_change_mode(mos_parport
, PS2
);
590 mos_parport
->shadowDCR
|= 0x20;
591 write_mos_reg(mos_parport
->serial
, dummy
, DCR
, mos_parport
->shadowDCR
);
592 parport_epilogue(pp
);
595 static void parport_mos7715_init_state(struct pardevice
*dev
,
596 struct parport_state
*s
)
598 dbg("%s called", __func__
);
599 s
->u
.pc
.ctr
= DCR_INIT_VAL
;
600 s
->u
.pc
.ecr
= ECR_INIT_VAL
;
603 /* N.B. Parport core code requires that this function not block */
604 static void parport_mos7715_save_state(struct parport
*pp
,
605 struct parport_state
*s
)
607 struct mos7715_parport
*mos_parport
;
608 dbg("%s called", __func__
);
609 spin_lock(&release_lock
);
610 mos_parport
= pp
->private_data
;
611 if (unlikely(mos_parport
== NULL
)) { /* release called */
612 spin_unlock(&release_lock
);
615 s
->u
.pc
.ctr
= mos_parport
->shadowDCR
;
616 s
->u
.pc
.ecr
= mos_parport
->shadowECR
;
617 spin_unlock(&release_lock
);
620 /* N.B. Parport core code requires that this function not block */
621 static void parport_mos7715_restore_state(struct parport
*pp
,
622 struct parport_state
*s
)
624 struct mos7715_parport
*mos_parport
;
625 dbg("%s called", __func__
);
626 spin_lock(&release_lock
);
627 mos_parport
= pp
->private_data
;
628 if (unlikely(mos_parport
== NULL
)) { /* release called */
629 spin_unlock(&release_lock
);
632 write_parport_reg_nonblock(mos_parport
, DCR
, mos_parport
->shadowDCR
);
633 write_parport_reg_nonblock(mos_parport
, ECR
, mos_parport
->shadowECR
);
634 spin_unlock(&release_lock
);
637 static size_t parport_mos7715_write_compat(struct parport
*pp
,
639 size_t len
, int flags
)
642 struct mos7715_parport
*mos_parport
= pp
->private_data
;
644 dbg("%s called: %u chars", __func__
, (unsigned int)len
);
645 if (parport_prologue(pp
) < 0)
647 mos7715_change_mode(mos_parport
, PPF
);
648 retval
= usb_bulk_msg(mos_parport
->serial
->dev
,
649 usb_sndbulkpipe(mos_parport
->serial
->dev
, 2),
650 (void *)buffer
, len
, &actual_len
,
652 parport_epilogue(pp
);
654 dev_err(&mos_parport
->serial
->dev
->dev
,
655 "mos7720: usb_bulk_msg() failed: %d", retval
);
661 static struct parport_operations parport_mos7715_ops
= {
662 .owner
= THIS_MODULE
,
663 .write_data
= parport_mos7715_write_data
,
664 .read_data
= parport_mos7715_read_data
,
666 .write_control
= parport_mos7715_write_control
,
667 .read_control
= parport_mos7715_read_control
,
668 .frob_control
= parport_mos7715_frob_control
,
670 .read_status
= parport_mos7715_read_status
,
672 .enable_irq
= parport_mos7715_enable_irq
,
673 .disable_irq
= parport_mos7715_disable_irq
,
675 .data_forward
= parport_mos7715_data_forward
,
676 .data_reverse
= parport_mos7715_data_reverse
,
678 .init_state
= parport_mos7715_init_state
,
679 .save_state
= parport_mos7715_save_state
,
680 .restore_state
= parport_mos7715_restore_state
,
682 .compat_write_data
= parport_mos7715_write_compat
,
684 .nibble_read_data
= parport_ieee1284_read_nibble
,
685 .byte_read_data
= parport_ieee1284_read_byte
,
689 * Allocate and initialize parallel port control struct, initialize
690 * the parallel port hardware device, and register with the parport subsystem.
692 static int mos7715_parport_init(struct usb_serial
*serial
)
694 struct mos7715_parport
*mos_parport
;
696 /* allocate and initialize parallel port control struct */
697 mos_parport
= kzalloc(sizeof(struct mos7715_parport
), GFP_KERNEL
);
698 if (mos_parport
== NULL
) {
699 dbg("mos7715_parport_init: kzalloc failed");
702 mos_parport
->msg_pending
= false;
703 kref_init(&mos_parport
->ref_count
);
704 spin_lock_init(&mos_parport
->listlock
);
705 INIT_LIST_HEAD(&mos_parport
->active_urbs
);
706 INIT_LIST_HEAD(&mos_parport
->deferred_urbs
);
707 usb_set_serial_data(serial
, mos_parport
); /* hijack private pointer */
708 mos_parport
->serial
= serial
;
709 tasklet_init(&mos_parport
->urb_tasklet
, send_deferred_urbs
,
710 (unsigned long) mos_parport
);
711 init_completion(&mos_parport
->syncmsg_compl
);
713 /* cycle parallel port reset bit */
714 write_mos_reg(mos_parport
->serial
, dummy
, PP_REG
, (__u8
)0x80);
715 write_mos_reg(mos_parport
->serial
, dummy
, PP_REG
, (__u8
)0x00);
717 /* initialize device registers */
718 mos_parport
->shadowDCR
= DCR_INIT_VAL
;
719 write_mos_reg(mos_parport
->serial
, dummy
, DCR
, mos_parport
->shadowDCR
);
720 mos_parport
->shadowECR
= ECR_INIT_VAL
;
721 write_mos_reg(mos_parport
->serial
, dummy
, ECR
, mos_parport
->shadowECR
);
723 /* register with parport core */
724 mos_parport
->pp
= parport_register_port(0, PARPORT_IRQ_NONE
,
726 &parport_mos7715_ops
);
727 if (mos_parport
->pp
== NULL
) {
728 dev_err(&serial
->interface
->dev
,
729 "Could not register parport\n");
730 kref_put(&mos_parport
->ref_count
, destroy_mos_parport
);
733 mos_parport
->pp
->private_data
= mos_parport
;
734 mos_parport
->pp
->modes
= PARPORT_MODE_COMPAT
| PARPORT_MODE_PCSPP
;
735 mos_parport
->pp
->dev
= &serial
->interface
->dev
;
736 parport_announce_port(mos_parport
->pp
);
740 #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
743 * mos7720_interrupt_callback
744 * this is the callback function for when we have received data on the
745 * interrupt endpoint.
747 static void mos7720_interrupt_callback(struct urb
*urb
)
751 int status
= urb
->status
;
763 /* this urb is terminated, clean up */
764 dbg("%s - urb shutting down with status: %d", __func__
,
768 dbg("%s - nonzero urb status received: %d", __func__
,
773 length
= urb
->actual_length
;
774 data
= urb
->transfer_buffer
;
776 /* Moschip get 4 bytes
777 * Byte 1 IIR Port 1 (port.number is 0)
778 * Byte 2 IIR Port 2 (port.number is 1)
779 * Byte 3 --------------
780 * Byte 4 FIFO status for both */
782 /* the above description is inverted
783 * oneukum 2007-03-14 */
785 if (unlikely(length
!= 4)) {
786 dbg("Wrong data !!!");
793 if ((sp1
| sp2
) & 0x01) {
794 /* No Interrupt Pending in both the ports */
795 dbg("No Interrupt !!!");
797 switch (sp1
& 0x0f) {
799 dbg("Serial Port 1: Receiver status error or address "
800 "bit detected in 9-bit mode\n");
803 dbg("Serial Port 1: Receiver time out");
806 /* dbg("Serial Port 1: Modem status change"); */
810 switch (sp2
& 0x0f) {
812 dbg("Serial Port 2: Receiver status error or address "
813 "bit detected in 9-bit mode");
816 dbg("Serial Port 2: Receiver time out");
819 /* dbg("Serial Port 2: Modem status change"); */
825 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
827 dev_err(&urb
->dev
->dev
,
828 "%s - Error %d submitting control urb\n",
834 * mos7715_interrupt_callback
835 * this is the 7715's callback function for when we have received data on
836 * the interrupt endpoint.
838 static void mos7715_interrupt_callback(struct urb
*urb
)
842 int status
= urb
->status
;
854 /* this urb is terminated, clean up */
855 dbg("%s - urb shutting down with status: %d", __func__
,
859 dbg("%s - nonzero urb status received: %d", __func__
,
864 length
= urb
->actual_length
;
865 data
= urb
->transfer_buffer
;
867 /* Structure of data from 7715 device:
868 * Byte 1: IIR serial Port
870 * Byte 2: DSR parallel port
871 * Byte 4: FIFO status for both */
873 if (unlikely(length
!= 4)) {
874 dbg("Wrong data !!!");
879 if (!(iir
& 0x01)) { /* serial port interrupt pending */
880 switch (iir
& 0x0f) {
882 dbg("Serial Port: Receiver status error or address "
883 "bit detected in 9-bit mode\n");
886 dbg("Serial Port: Receiver time out");
889 /* dbg("Serial Port: Modem status change"); */
894 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
895 { /* update local copy of DSR reg */
896 struct usb_serial_port
*port
= urb
->context
;
897 struct mos7715_parport
*mos_parport
= port
->serial
->private;
898 if (unlikely(mos_parport
== NULL
))
900 atomic_set(&mos_parport
->shadowDSR
, data
[2]);
905 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
907 dev_err(&urb
->dev
->dev
,
908 "%s - Error %d submitting control urb\n",
914 * mos7720_bulk_in_callback
915 * this is the callback function for when we have received data on the
918 static void mos7720_bulk_in_callback(struct urb
*urb
)
921 unsigned char *data
;
922 struct usb_serial_port
*port
;
923 struct tty_struct
*tty
;
924 int status
= urb
->status
;
927 dbg("nonzero read bulk status received: %d", status
);
933 dbg("Entering...%s", __func__
);
935 data
= urb
->transfer_buffer
;
937 tty
= tty_port_tty_get(&port
->port
);
938 if (tty
&& urb
->actual_length
) {
939 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
940 tty_flip_buffer_push(tty
);
944 if (!port
->read_urb
) {
945 dbg("URB KILLED !!!");
949 if (port
->read_urb
->status
!= -EINPROGRESS
) {
950 port
->read_urb
->dev
= port
->serial
->dev
;
952 retval
= usb_submit_urb(port
->read_urb
, GFP_ATOMIC
);
954 dbg("usb_submit_urb(read bulk) failed, retval = %d",
960 * mos7720_bulk_out_data_callback
961 * this is the callback function for when we have finished sending serial
962 * data on the bulk out endpoint.
964 static void mos7720_bulk_out_data_callback(struct urb
*urb
)
966 struct moschip_port
*mos7720_port
;
967 struct tty_struct
*tty
;
968 int status
= urb
->status
;
971 dbg("nonzero write bulk status received:%d", status
);
975 mos7720_port
= urb
->context
;
977 dbg("NULL mos7720_port pointer");
981 tty
= tty_port_tty_get(&mos7720_port
->port
->port
);
983 if (tty
&& mos7720_port
->open
)
990 * this function installs the appropriate read interrupt endpoint callback
991 * depending on whether the device is a 7720 or 7715, thus avoiding costly
992 * run-time checks in the high-frequency callback routine itself.
994 static int mos77xx_probe(struct usb_serial
*serial
,
995 const struct usb_device_id
*id
)
997 if (id
->idProduct
== MOSCHIP_DEVICE_ID_7715
)
998 moschip7720_2port_driver
.read_int_callback
=
999 mos7715_interrupt_callback
;
1001 moschip7720_2port_driver
.read_int_callback
=
1002 mos7720_interrupt_callback
;
1007 static int mos77xx_calc_num_ports(struct usb_serial
*serial
)
1009 u16 product
= le16_to_cpu(serial
->dev
->descriptor
.idProduct
);
1010 if (product
== MOSCHIP_DEVICE_ID_7715
)
1016 static int mos7720_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
1018 struct usb_serial
*serial
;
1019 struct usb_serial_port
*port0
;
1021 struct moschip_port
*mos7720_port
;
1025 int allocated_urbs
= 0;
1028 serial
= port
->serial
;
1030 mos7720_port
= usb_get_serial_port_data(port
);
1031 if (mos7720_port
== NULL
)
1034 port0
= serial
->port
[0];
1036 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
1037 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
1039 /* Initialising the write urb pool */
1040 for (j
= 0; j
< NUM_URBS
; ++j
) {
1041 urb
= usb_alloc_urb(0, GFP_KERNEL
);
1042 mos7720_port
->write_urb_pool
[j
] = urb
;
1045 dev_err(&port
->dev
, "No more urbs???\n");
1049 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
1051 if (!urb
->transfer_buffer
) {
1053 "%s-out of memory for urb buffers.\n",
1055 usb_free_urb(mos7720_port
->write_urb_pool
[j
]);
1056 mos7720_port
->write_urb_pool
[j
] = NULL
;
1062 if (!allocated_urbs
)
1065 /* Initialize MCS7720 -- Write Init values to corresponding Registers
1077 * 0x08 : SP1/2 Control Reg
1079 port_number
= port
->number
- port
->serial
->minor
;
1080 read_mos_reg(serial
, port_number
, LSR
, &data
);
1082 dbg("SS::%p LSR:%x", mos7720_port
, data
);
1084 dbg("Check:Sending Command ..........");
1086 write_mos_reg(serial
, dummy
, SP1_REG
, 0x02);
1087 write_mos_reg(serial
, dummy
, SP2_REG
, 0x02);
1089 write_mos_reg(serial
, port_number
, IER
, 0x00);
1090 write_mos_reg(serial
, port_number
, FCR
, 0x00);
1092 write_mos_reg(serial
, port_number
, FCR
, 0xcf);
1093 mos7720_port
->shadowLCR
= 0x03;
1094 write_mos_reg(serial
, port_number
, LCR
, mos7720_port
->shadowLCR
);
1095 mos7720_port
->shadowMCR
= 0x0b;
1096 write_mos_reg(serial
, port_number
, MCR
, mos7720_port
->shadowMCR
);
1098 write_mos_reg(serial
, port_number
, SP_CONTROL_REG
, 0x00);
1099 read_mos_reg(serial
, dummy
, SP_CONTROL_REG
, &data
);
1100 data
= data
| (port
->number
- port
->serial
->minor
+ 1);
1101 write_mos_reg(serial
, dummy
, SP_CONTROL_REG
, data
);
1102 mos7720_port
->shadowLCR
= 0x83;
1103 write_mos_reg(serial
, port_number
, LCR
, mos7720_port
->shadowLCR
);
1104 write_mos_reg(serial
, port_number
, THR
, 0x0c);
1105 write_mos_reg(serial
, port_number
, IER
, 0x00);
1106 mos7720_port
->shadowLCR
= 0x03;
1107 write_mos_reg(serial
, port_number
, LCR
, mos7720_port
->shadowLCR
);
1108 write_mos_reg(serial
, port_number
, IER
, 0x0c);
1110 response
= usb_submit_urb(port
->read_urb
, GFP_KERNEL
);
1112 dev_err(&port
->dev
, "%s - Error %d submitting read urb\n",
1113 __func__
, response
);
1115 /* initialize our icount structure */
1116 memset(&(mos7720_port
->icount
), 0x00, sizeof(mos7720_port
->icount
));
1118 /* initialize our port settings */
1119 mos7720_port
->shadowMCR
= UART_MCR_OUT2
; /* Must set to enable ints! */
1121 /* send a open port command */
1122 mos7720_port
->open
= 1;
1128 * mos7720_chars_in_buffer
1129 * this function is called by the tty driver when it wants to know how many
1130 * bytes of data we currently have outstanding in the port (data that has
1131 * been written, but hasn't made it out the port yet)
1132 * If successful, we return the number of bytes left to be written in the
1134 * Otherwise we return a negative error number.
1136 static int mos7720_chars_in_buffer(struct tty_struct
*tty
)
1138 struct usb_serial_port
*port
= tty
->driver_data
;
1141 struct moschip_port
*mos7720_port
;
1143 dbg("%s:entering ...........", __func__
);
1145 mos7720_port
= usb_get_serial_port_data(port
);
1146 if (mos7720_port
== NULL
) {
1147 dbg("%s:leaving ...........", __func__
);
1151 for (i
= 0; i
< NUM_URBS
; ++i
) {
1152 if (mos7720_port
->write_urb_pool
[i
] &&
1153 mos7720_port
->write_urb_pool
[i
]->status
== -EINPROGRESS
)
1154 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1156 dbg("%s - returns %d", __func__
, chars
);
1160 static void mos7720_close(struct usb_serial_port
*port
)
1162 struct usb_serial
*serial
;
1163 struct moschip_port
*mos7720_port
;
1166 dbg("mos7720_close:entering...");
1168 serial
= port
->serial
;
1170 mos7720_port
= usb_get_serial_port_data(port
);
1171 if (mos7720_port
== NULL
)
1174 for (j
= 0; j
< NUM_URBS
; ++j
)
1175 usb_kill_urb(mos7720_port
->write_urb_pool
[j
]);
1177 /* Freeing Write URBs */
1178 for (j
= 0; j
< NUM_URBS
; ++j
) {
1179 if (mos7720_port
->write_urb_pool
[j
]) {
1180 kfree(mos7720_port
->write_urb_pool
[j
]->transfer_buffer
);
1181 usb_free_urb(mos7720_port
->write_urb_pool
[j
]);
1185 /* While closing port, shutdown all bulk read, write *
1186 * and interrupt read if they exists, otherwise nop */
1187 dbg("Shutdown bulk write");
1188 usb_kill_urb(port
->write_urb
);
1189 dbg("Shutdown bulk read");
1190 usb_kill_urb(port
->read_urb
);
1192 mutex_lock(&serial
->disc_mutex
);
1193 /* these commands must not be issued if the device has
1194 * been disconnected */
1195 if (!serial
->disconnected
) {
1196 write_mos_reg(serial
, port
->number
- port
->serial
->minor
,
1198 write_mos_reg(serial
, port
->number
- port
->serial
->minor
,
1201 mutex_unlock(&serial
->disc_mutex
);
1202 mos7720_port
->open
= 0;
1204 dbg("Leaving %s", __func__
);
1207 static void mos7720_break(struct tty_struct
*tty
, int break_state
)
1209 struct usb_serial_port
*port
= tty
->driver_data
;
1211 struct usb_serial
*serial
;
1212 struct moschip_port
*mos7720_port
;
1214 dbg("Entering %s", __func__
);
1216 serial
= port
->serial
;
1218 mos7720_port
= usb_get_serial_port_data(port
);
1219 if (mos7720_port
== NULL
)
1222 if (break_state
== -1)
1223 data
= mos7720_port
->shadowLCR
| UART_LCR_SBC
;
1225 data
= mos7720_port
->shadowLCR
& ~UART_LCR_SBC
;
1227 mos7720_port
->shadowLCR
= data
;
1228 write_mos_reg(serial
, port
->number
- port
->serial
->minor
,
1229 LCR
, mos7720_port
->shadowLCR
);
1235 * mos7720_write_room
1236 * this function is called by the tty driver when it wants to know how many
1237 * bytes of data we can accept for a specific port.
1238 * If successful, we return the amount of room that we have for this port
1239 * Otherwise we return a negative error number.
1241 static int mos7720_write_room(struct tty_struct
*tty
)
1243 struct usb_serial_port
*port
= tty
->driver_data
;
1244 struct moschip_port
*mos7720_port
;
1248 dbg("%s:entering ...........", __func__
);
1250 mos7720_port
= usb_get_serial_port_data(port
);
1251 if (mos7720_port
== NULL
) {
1252 dbg("%s:leaving ...........", __func__
);
1256 /* FIXME: Locking */
1257 for (i
= 0; i
< NUM_URBS
; ++i
) {
1258 if (mos7720_port
->write_urb_pool
[i
] &&
1259 mos7720_port
->write_urb_pool
[i
]->status
!= -EINPROGRESS
)
1260 room
+= URB_TRANSFER_BUFFER_SIZE
;
1263 dbg("%s - returns %d", __func__
, room
);
1267 static int mos7720_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1268 const unsigned char *data
, int count
)
1275 struct moschip_port
*mos7720_port
;
1276 struct usb_serial
*serial
;
1278 const unsigned char *current_position
= data
;
1280 dbg("%s:entering ...........", __func__
);
1282 serial
= port
->serial
;
1284 mos7720_port
= usb_get_serial_port_data(port
);
1285 if (mos7720_port
== NULL
) {
1286 dbg("mos7720_port is NULL");
1290 /* try to find a free urb in the list */
1293 for (i
= 0; i
< NUM_URBS
; ++i
) {
1294 if (mos7720_port
->write_urb_pool
[i
] &&
1295 mos7720_port
->write_urb_pool
[i
]->status
!= -EINPROGRESS
) {
1296 urb
= mos7720_port
->write_urb_pool
[i
];
1303 dbg("%s - no more free urbs", __func__
);
1307 if (urb
->transfer_buffer
== NULL
) {
1308 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
1310 if (urb
->transfer_buffer
== NULL
) {
1311 dev_err(&port
->dev
, "%s no more kernel memory...\n",
1316 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1318 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1319 usb_serial_debug_data(debug
, &port
->dev
, __func__
, transfer_size
,
1320 urb
->transfer_buffer
);
1322 /* fill urb with data and submit */
1323 usb_fill_bulk_urb(urb
, serial
->dev
,
1324 usb_sndbulkpipe(serial
->dev
,
1325 port
->bulk_out_endpointAddress
),
1326 urb
->transfer_buffer
, transfer_size
,
1327 mos7720_bulk_out_data_callback
, mos7720_port
);
1329 /* send it down the pipe */
1330 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1332 dev_err(&port
->dev
, "%s - usb_submit_urb(write bulk) failed "
1333 "with status = %d\n", __func__
, status
);
1334 bytes_sent
= status
;
1337 bytes_sent
= transfer_size
;
1343 static void mos7720_throttle(struct tty_struct
*tty
)
1345 struct usb_serial_port
*port
= tty
->driver_data
;
1346 struct moschip_port
*mos7720_port
;
1349 dbg("%s- port %d", __func__
, port
->number
);
1351 mos7720_port
= usb_get_serial_port_data(port
);
1353 if (mos7720_port
== NULL
)
1356 if (!mos7720_port
->open
) {
1357 dbg("port not opened");
1361 dbg("%s: Entering ..........", __func__
);
1363 /* if we are implementing XON/XOFF, send the stop character */
1365 unsigned char stop_char
= STOP_CHAR(tty
);
1366 status
= mos7720_write(tty
, port
, &stop_char
, 1);
1371 /* if we are implementing RTS/CTS, toggle that line */
1372 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1373 mos7720_port
->shadowMCR
&= ~UART_MCR_RTS
;
1374 write_mos_reg(port
->serial
, port
->number
- port
->serial
->minor
,
1375 MCR
, mos7720_port
->shadowMCR
);
1381 static void mos7720_unthrottle(struct tty_struct
*tty
)
1383 struct usb_serial_port
*port
= tty
->driver_data
;
1384 struct moschip_port
*mos7720_port
= usb_get_serial_port_data(port
);
1387 if (mos7720_port
== NULL
)
1390 if (!mos7720_port
->open
) {
1391 dbg("%s - port not opened", __func__
);
1395 dbg("%s: Entering ..........", __func__
);
1397 /* if we are implementing XON/XOFF, send the start character */
1399 unsigned char start_char
= START_CHAR(tty
);
1400 status
= mos7720_write(tty
, port
, &start_char
, 1);
1405 /* if we are implementing RTS/CTS, toggle that line */
1406 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1407 mos7720_port
->shadowMCR
|= UART_MCR_RTS
;
1408 write_mos_reg(port
->serial
, port
->number
- port
->serial
->minor
,
1409 MCR
, mos7720_port
->shadowMCR
);
1415 /* FIXME: this function does not work */
1416 static int set_higher_rates(struct moschip_port
*mos7720_port
,
1419 struct usb_serial_port
*port
;
1420 struct usb_serial
*serial
;
1422 enum mos_regs sp_reg
;
1423 if (mos7720_port
== NULL
)
1426 port
= mos7720_port
->port
;
1427 serial
= port
->serial
;
1429 /***********************************************
1430 * Init Sequence for higher rates
1431 ***********************************************/
1432 dbg("Sending Setting Commands ..........");
1433 port_number
= port
->number
- port
->serial
->minor
;
1435 write_mos_reg(serial
, port_number
, IER
, 0x00);
1436 write_mos_reg(serial
, port_number
, FCR
, 0x00);
1437 write_mos_reg(serial
, port_number
, FCR
, 0xcf);
1438 mos7720_port
->shadowMCR
= 0x0b;
1439 write_mos_reg(serial
, port_number
, MCR
, mos7720_port
->shadowMCR
);
1440 write_mos_reg(serial
, dummy
, SP_CONTROL_REG
, 0x00);
1442 /***********************************************
1443 * Set for higher rates *
1444 ***********************************************/
1445 /* writing baud rate verbatum into uart clock field clearly not right */
1446 if (port_number
== 0)
1450 write_mos_reg(serial
, dummy
, sp_reg
, baud
* 0x10);
1451 write_mos_reg(serial
, dummy
, SP_CONTROL_REG
, 0x03);
1452 mos7720_port
->shadowMCR
= 0x2b;
1453 write_mos_reg(serial
, port_number
, MCR
, mos7720_port
->shadowMCR
);
1455 /***********************************************
1457 ***********************************************/
1458 mos7720_port
->shadowLCR
= mos7720_port
->shadowLCR
| UART_LCR_DLAB
;
1459 write_mos_reg(serial
, port_number
, LCR
, mos7720_port
->shadowLCR
);
1460 write_mos_reg(serial
, port_number
, DLL
, 0x01);
1461 write_mos_reg(serial
, port_number
, DLM
, 0x00);
1462 mos7720_port
->shadowLCR
= mos7720_port
->shadowLCR
& ~UART_LCR_DLAB
;
1463 write_mos_reg(serial
, port_number
, LCR
, mos7720_port
->shadowLCR
);
1468 /* baud rate information */
1469 struct divisor_table_entry
{
1474 /* Define table of divisors for moschip 7720 hardware *
1475 * These assume a 3.6864MHz crystal, the standard /16, and *
1477 static struct divisor_table_entry divisor_table
[] = {
1479 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
1480 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
1496 /*****************************************************************************
1497 * calc_baud_rate_divisor
1498 * this function calculates the proper baud rate divisor for the specified
1500 *****************************************************************************/
1501 static int calc_baud_rate_divisor(int baudrate
, int *divisor
)
1509 dbg("%s - %d", __func__
, baudrate
);
1511 for (i
= 0; i
< ARRAY_SIZE(divisor_table
); i
++) {
1512 if (divisor_table
[i
].baudrate
== baudrate
) {
1513 *divisor
= divisor_table
[i
].divisor
;
1518 /* After trying for all the standard baud rates *
1519 * Try calculating the divisor for this baud rate */
1520 if (baudrate
> 75 && baudrate
< 230400) {
1521 /* get the divisor */
1522 custom
= (__u16
)(230400L / baudrate
);
1524 /* Check for round off */
1525 round1
= (__u16
)(2304000L / baudrate
);
1526 round
= (__u16
)(round1
- (custom
* 10));
1531 dbg("Baud %d = %d", baudrate
, custom
);
1535 dbg("Baud calculation Failed...");
1540 * send_cmd_write_baud_rate
1541 * this function sends the proper command to change the baud rate of the
1544 static int send_cmd_write_baud_rate(struct moschip_port
*mos7720_port
,
1547 struct usb_serial_port
*port
;
1548 struct usb_serial
*serial
;
1551 unsigned char number
;
1553 if (mos7720_port
== NULL
)
1556 port
= mos7720_port
->port
;
1557 serial
= port
->serial
;
1559 dbg("%s: Entering ..........", __func__
);
1561 number
= port
->number
- port
->serial
->minor
;
1562 dbg("%s - port = %d, baud = %d", __func__
, port
->number
, baudrate
);
1564 /* Calculate the Divisor */
1565 status
= calc_baud_rate_divisor(baudrate
, &divisor
);
1567 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1571 /* Enable access to divisor latch */
1572 mos7720_port
->shadowLCR
= mos7720_port
->shadowLCR
| UART_LCR_DLAB
;
1573 write_mos_reg(serial
, number
, LCR
, mos7720_port
->shadowLCR
);
1575 /* Write the divisor */
1576 write_mos_reg(serial
, number
, DLL
, (__u8
)(divisor
& 0xff));
1577 write_mos_reg(serial
, number
, DLM
, (__u8
)((divisor
& 0xff00) >> 8));
1579 /* Disable access to divisor latch */
1580 mos7720_port
->shadowLCR
= mos7720_port
->shadowLCR
& ~UART_LCR_DLAB
;
1581 write_mos_reg(serial
, number
, LCR
, mos7720_port
->shadowLCR
);
1587 * change_port_settings
1588 * This routine is called to set the UART on the device to match
1589 * the specified new settings.
1591 static void change_port_settings(struct tty_struct
*tty
,
1592 struct moschip_port
*mos7720_port
,
1593 struct ktermios
*old_termios
)
1595 struct usb_serial_port
*port
;
1596 struct usb_serial
*serial
;
1607 if (mos7720_port
== NULL
)
1610 port
= mos7720_port
->port
;
1611 serial
= port
->serial
;
1612 port_number
= port
->number
- port
->serial
->minor
;
1614 dbg("%s - port %d", __func__
, port
->number
);
1616 if (!mos7720_port
->open
) {
1617 dbg("%s - port not opened", __func__
);
1621 dbg("%s: Entering ..........", __func__
);
1623 lData
= UART_LCR_WLEN8
;
1624 lStop
= 0x00; /* 1 stop bit */
1625 lParity
= 0x00; /* No parity */
1627 cflag
= tty
->termios
->c_cflag
;
1628 iflag
= tty
->termios
->c_iflag
;
1630 /* Change the number of bits */
1631 switch (cflag
& CSIZE
) {
1633 lData
= UART_LCR_WLEN5
;
1638 lData
= UART_LCR_WLEN6
;
1643 lData
= UART_LCR_WLEN7
;
1648 lData
= UART_LCR_WLEN8
;
1652 /* Change the Parity bit */
1653 if (cflag
& PARENB
) {
1654 if (cflag
& PARODD
) {
1655 lParity
= UART_LCR_PARITY
;
1656 dbg("%s - parity = odd", __func__
);
1658 lParity
= (UART_LCR_EPAR
| UART_LCR_PARITY
);
1659 dbg("%s - parity = even", __func__
);
1663 dbg("%s - parity = none", __func__
);
1667 lParity
= lParity
| 0x20;
1669 /* Change the Stop bit */
1670 if (cflag
& CSTOPB
) {
1671 lStop
= UART_LCR_STOP
;
1672 dbg("%s - stop bits = 2", __func__
);
1675 dbg("%s - stop bits = 1", __func__
);
1678 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
1679 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
1680 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
1682 /* Update the LCR with the correct value */
1683 mos7720_port
->shadowLCR
&=
1684 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
1685 mos7720_port
->shadowLCR
|= (lData
| lParity
| lStop
);
1688 /* Disable Interrupts */
1689 write_mos_reg(serial
, port_number
, IER
, 0x00);
1690 write_mos_reg(serial
, port_number
, FCR
, 0x00);
1691 write_mos_reg(serial
, port_number
, FCR
, 0xcf);
1693 /* Send the updated LCR value to the mos7720 */
1694 write_mos_reg(serial
, port_number
, LCR
, mos7720_port
->shadowLCR
);
1695 mos7720_port
->shadowMCR
= 0x0b;
1696 write_mos_reg(serial
, port_number
, MCR
, mos7720_port
->shadowMCR
);
1698 /* set up the MCR register and send it to the mos7720 */
1699 mos7720_port
->shadowMCR
= UART_MCR_OUT2
;
1701 mos7720_port
->shadowMCR
|= (UART_MCR_DTR
| UART_MCR_RTS
);
1703 if (cflag
& CRTSCTS
) {
1704 mos7720_port
->shadowMCR
|= (UART_MCR_XONANY
);
1705 /* To set hardware flow control to the specified *
1706 * serial port, in SP1/2_CONTROL_REG */
1708 write_mos_reg(serial
, dummy
, SP_CONTROL_REG
, 0x01);
1710 write_mos_reg(serial
, dummy
, SP_CONTROL_REG
, 0x02);
1713 mos7720_port
->shadowMCR
&= ~(UART_MCR_XONANY
);
1715 write_mos_reg(serial
, port_number
, MCR
, mos7720_port
->shadowMCR
);
1717 /* Determine divisor based on baud rate */
1718 baud
= tty_get_baud_rate(tty
);
1720 /* pick a default, any default... */
1721 dbg("Picked default baud...");
1725 if (baud
>= 230400) {
1726 set_higher_rates(mos7720_port
, baud
);
1727 /* Enable Interrupts */
1728 write_mos_reg(serial
, port_number
, IER
, 0x0c);
1732 dbg("%s - baud rate = %d", __func__
, baud
);
1733 status
= send_cmd_write_baud_rate(mos7720_port
, baud
);
1734 /* FIXME: needs to write actual resulting baud back not just
1737 tty_encode_baud_rate(tty
, baud
, baud
);
1738 /* Enable Interrupts */
1739 write_mos_reg(serial
, port_number
, IER
, 0x0c);
1741 if (port
->read_urb
->status
!= -EINPROGRESS
) {
1742 port
->read_urb
->dev
= serial
->dev
;
1744 status
= usb_submit_urb(port
->read_urb
, GFP_ATOMIC
);
1746 dbg("usb_submit_urb(read bulk) failed, status = %d",
1753 * mos7720_set_termios
1754 * this function is called by the tty driver when it wants to change the
1755 * termios structure.
1757 static void mos7720_set_termios(struct tty_struct
*tty
,
1758 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
1762 struct usb_serial
*serial
;
1763 struct moschip_port
*mos7720_port
;
1765 serial
= port
->serial
;
1767 mos7720_port
= usb_get_serial_port_data(port
);
1769 if (mos7720_port
== NULL
)
1772 if (!mos7720_port
->open
) {
1773 dbg("%s - port not opened", __func__
);
1777 dbg("%s\n", "setting termios - ASPIRE");
1779 cflag
= tty
->termios
->c_cflag
;
1781 dbg("%s - cflag %08x iflag %08x", __func__
,
1782 tty
->termios
->c_cflag
,
1783 RELEVANT_IFLAG(tty
->termios
->c_iflag
));
1785 dbg("%s - old cflag %08x old iflag %08x", __func__
,
1786 old_termios
->c_cflag
,
1787 RELEVANT_IFLAG(old_termios
->c_iflag
));
1789 dbg("%s - port %d", __func__
, port
->number
);
1791 /* change the port settings to the new ones specified */
1792 change_port_settings(tty
, mos7720_port
, old_termios
);
1794 if (!port
->read_urb
) {
1795 dbg("%s", "URB KILLED !!!!!");
1799 if (port
->read_urb
->status
!= -EINPROGRESS
) {
1800 port
->read_urb
->dev
= serial
->dev
;
1801 status
= usb_submit_urb(port
->read_urb
, GFP_ATOMIC
);
1803 dbg("usb_submit_urb(read bulk) failed, status = %d",
1810 * get_lsr_info - get line status register info
1812 * Purpose: Let user call ioctl() to get info when the UART physically
1813 * is emptied. On bus types like RS485, the transmitter must
1814 * release the bus after transmitting. This must be done when
1815 * the transmit shift register is empty, not be done when the
1816 * transmit holding register is empty. This functionality
1817 * allows an RS485 driver to be written in user space.
1819 static int get_lsr_info(struct tty_struct
*tty
,
1820 struct moschip_port
*mos7720_port
, unsigned int __user
*value
)
1822 struct usb_serial_port
*port
= tty
->driver_data
;
1823 unsigned int result
= 0;
1824 unsigned char data
= 0;
1825 int port_number
= port
->number
- port
->serial
->minor
;
1828 count
= mos7720_chars_in_buffer(tty
);
1830 read_mos_reg(port
->serial
, port_number
, LSR
, &data
);
1831 if ((data
& (UART_LSR_TEMT
| UART_LSR_THRE
))
1832 == (UART_LSR_TEMT
| UART_LSR_THRE
)) {
1833 dbg("%s -- Empty", __func__
);
1834 result
= TIOCSER_TEMT
;
1837 if (copy_to_user(value
, &result
, sizeof(int)))
1842 static int mos7720_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1844 struct usb_serial_port
*port
= tty
->driver_data
;
1845 struct moschip_port
*mos7720_port
= usb_get_serial_port_data(port
);
1846 unsigned int result
= 0;
1850 dbg("%s - port %d", __func__
, port
->number
);
1852 mcr
= mos7720_port
->shadowMCR
;
1853 msr
= mos7720_port
->shadowMSR
;
1855 result
= ((mcr
& UART_MCR_DTR
) ? TIOCM_DTR
: 0) /* 0x002 */
1856 | ((mcr
& UART_MCR_RTS
) ? TIOCM_RTS
: 0) /* 0x004 */
1857 | ((msr
& UART_MSR_CTS
) ? TIOCM_CTS
: 0) /* 0x020 */
1858 | ((msr
& UART_MSR_DCD
) ? TIOCM_CAR
: 0) /* 0x040 */
1859 | ((msr
& UART_MSR_RI
) ? TIOCM_RI
: 0) /* 0x080 */
1860 | ((msr
& UART_MSR_DSR
) ? TIOCM_DSR
: 0); /* 0x100 */
1862 dbg("%s -- %x", __func__
, result
);
1867 static int mos7720_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1868 unsigned int set
, unsigned int clear
)
1870 struct usb_serial_port
*port
= tty
->driver_data
;
1871 struct moschip_port
*mos7720_port
= usb_get_serial_port_data(port
);
1873 dbg("%s - port %d", __func__
, port
->number
);
1874 dbg("he was at tiocmget");
1876 mcr
= mos7720_port
->shadowMCR
;
1878 if (set
& TIOCM_RTS
)
1879 mcr
|= UART_MCR_RTS
;
1880 if (set
& TIOCM_DTR
)
1881 mcr
|= UART_MCR_DTR
;
1882 if (set
& TIOCM_LOOP
)
1883 mcr
|= UART_MCR_LOOP
;
1885 if (clear
& TIOCM_RTS
)
1886 mcr
&= ~UART_MCR_RTS
;
1887 if (clear
& TIOCM_DTR
)
1888 mcr
&= ~UART_MCR_DTR
;
1889 if (clear
& TIOCM_LOOP
)
1890 mcr
&= ~UART_MCR_LOOP
;
1892 mos7720_port
->shadowMCR
= mcr
;
1893 write_mos_reg(port
->serial
, port
->number
- port
->serial
->minor
,
1894 MCR
, mos7720_port
->shadowMCR
);
1899 static int set_modem_info(struct moschip_port
*mos7720_port
, unsigned int cmd
,
1900 unsigned int __user
*value
)
1905 struct usb_serial_port
*port
;
1907 if (mos7720_port
== NULL
)
1910 port
= (struct usb_serial_port
*)mos7720_port
->port
;
1911 mcr
= mos7720_port
->shadowMCR
;
1913 if (copy_from_user(&arg
, value
, sizeof(int)))
1918 if (arg
& TIOCM_RTS
)
1919 mcr
|= UART_MCR_RTS
;
1920 if (arg
& TIOCM_DTR
)
1921 mcr
|= UART_MCR_RTS
;
1922 if (arg
& TIOCM_LOOP
)
1923 mcr
|= UART_MCR_LOOP
;
1927 if (arg
& TIOCM_RTS
)
1928 mcr
&= ~UART_MCR_RTS
;
1929 if (arg
& TIOCM_DTR
)
1930 mcr
&= ~UART_MCR_RTS
;
1931 if (arg
& TIOCM_LOOP
)
1932 mcr
&= ~UART_MCR_LOOP
;
1937 mos7720_port
->shadowMCR
= mcr
;
1938 write_mos_reg(port
->serial
, port
->number
- port
->serial
->minor
,
1939 MCR
, mos7720_port
->shadowMCR
);
1944 static int get_serial_info(struct moschip_port
*mos7720_port
,
1945 struct serial_struct __user
*retinfo
)
1947 struct serial_struct tmp
;
1952 memset(&tmp
, 0, sizeof(tmp
));
1954 tmp
.type
= PORT_16550A
;
1955 tmp
.line
= mos7720_port
->port
->serial
->minor
;
1956 tmp
.port
= mos7720_port
->port
->number
;
1958 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
1959 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
1960 tmp
.baud_base
= 9600;
1961 tmp
.close_delay
= 5*HZ
;
1962 tmp
.closing_wait
= 30*HZ
;
1964 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1969 static int mos7720_ioctl(struct tty_struct
*tty
, struct file
*file
,
1970 unsigned int cmd
, unsigned long arg
)
1972 struct usb_serial_port
*port
= tty
->driver_data
;
1973 struct moschip_port
*mos7720_port
;
1974 struct async_icount cnow
;
1975 struct async_icount cprev
;
1976 struct serial_icounter_struct icount
;
1978 mos7720_port
= usb_get_serial_port_data(port
);
1979 if (mos7720_port
== NULL
)
1982 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
1986 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
1987 return get_lsr_info(tty
, mos7720_port
,
1988 (unsigned int __user
*)arg
);
1991 /* FIXME: These should be using the mode methods */
1994 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET",
1995 __func__
, port
->number
);
1996 return set_modem_info(mos7720_port
, cmd
,
1997 (unsigned int __user
*)arg
);
2000 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2001 return get_serial_info(mos7720_port
,
2002 (struct serial_struct __user
*)arg
);
2005 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2006 cprev
= mos7720_port
->icount
;
2008 if (signal_pending(current
))
2009 return -ERESTARTSYS
;
2010 cnow
= mos7720_port
->icount
;
2011 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2012 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2013 return -EIO
; /* no change => error */
2014 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2015 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2016 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2017 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2026 cnow
= mos7720_port
->icount
;
2028 memset(&icount
, 0, sizeof(struct serial_icounter_struct
));
2030 icount
.cts
= cnow
.cts
;
2031 icount
.dsr
= cnow
.dsr
;
2032 icount
.rng
= cnow
.rng
;
2033 icount
.dcd
= cnow
.dcd
;
2034 icount
.rx
= cnow
.rx
;
2035 icount
.tx
= cnow
.tx
;
2036 icount
.frame
= cnow
.frame
;
2037 icount
.overrun
= cnow
.overrun
;
2038 icount
.parity
= cnow
.parity
;
2039 icount
.brk
= cnow
.brk
;
2040 icount
.buf_overrun
= cnow
.buf_overrun
;
2042 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2043 port
->number
, icount
.rx
, icount
.tx
);
2044 if (copy_to_user((void __user
*)arg
, &icount
, sizeof(icount
)))
2049 return -ENOIOCTLCMD
;
2052 static int mos7720_startup(struct usb_serial
*serial
)
2054 struct moschip_port
*mos7720_port
;
2055 struct usb_device
*dev
;
2058 u16 product
= le16_to_cpu(serial
->dev
->descriptor
.idProduct
);
2061 dbg("%s: Entering ..........", __func__
);
2064 dbg("Invalid Handler");
2071 * The 7715 uses the first bulk in/out endpoint pair for the parallel
2072 * port, and the second for the serial port. Because the usbserial core
2073 * assumes both pairs are serial ports, we must engage in a bit of
2074 * subterfuge and swap the pointers for ports 0 and 1 in order to make
2075 * port 0 point to the serial port. However, both moschip devices use a
2076 * single interrupt-in endpoint for both ports (as mentioned a little
2077 * further down), and this endpoint was assigned to port 0. So after
2078 * the swap, we must copy the interrupt endpoint elements from port 1
2079 * (as newly assigned) to port 0, and null out port 1 pointers.
2081 if (product
== MOSCHIP_DEVICE_ID_7715
) {
2082 struct usb_serial_port
*tmp
= serial
->port
[0];
2083 serial
->port
[0] = serial
->port
[1];
2084 serial
->port
[1] = tmp
;
2085 serial
->port
[0]->interrupt_in_urb
= tmp
->interrupt_in_urb
;
2086 serial
->port
[0]->interrupt_in_buffer
= tmp
->interrupt_in_buffer
;
2087 serial
->port
[0]->interrupt_in_endpointAddress
=
2088 tmp
->interrupt_in_endpointAddress
;
2089 serial
->port
[1]->interrupt_in_urb
= NULL
;
2090 serial
->port
[1]->interrupt_in_buffer
= NULL
;
2094 /* set up serial port private structures */
2095 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2096 mos7720_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2097 if (mos7720_port
== NULL
) {
2098 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2102 /* Initialize all port interrupt end point to port 0 int
2103 * endpoint. Our device has only one interrupt endpoint
2104 * common to all ports */
2105 serial
->port
[i
]->interrupt_in_endpointAddress
=
2106 serial
->port
[0]->interrupt_in_endpointAddress
;
2108 mos7720_port
->port
= serial
->port
[i
];
2109 usb_set_serial_port_data(serial
->port
[i
], mos7720_port
);
2111 dbg("port number is %d", serial
->port
[i
]->number
);
2112 dbg("serial number is %d", serial
->minor
);
2116 /* setting configuration feature to one */
2117 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2118 (__u8
)0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5*HZ
);
2120 /* start the interrupt urb */
2121 ret_val
= usb_submit_urb(serial
->port
[0]->interrupt_in_urb
, GFP_KERNEL
);
2124 "%s - Error %d submitting control urb\n",
2127 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
2128 if (product
== MOSCHIP_DEVICE_ID_7715
) {
2129 ret_val
= mos7715_parport_init(serial
);
2134 /* LSR For Port 1 */
2135 read_mos_reg(serial
, 0, LSR
, &data
);
2136 dbg("LSR:%x", data
);
2141 static void mos7720_release(struct usb_serial
*serial
)
2145 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
2146 /* close the parallel port */
2148 if (le16_to_cpu(serial
->dev
->descriptor
.idProduct
)
2149 == MOSCHIP_DEVICE_ID_7715
) {
2150 struct urbtracker
*urbtrack
;
2151 unsigned long flags
;
2152 struct mos7715_parport
*mos_parport
=
2153 usb_get_serial_data(serial
);
2155 /* prevent NULL ptr dereference in port callbacks */
2156 spin_lock(&release_lock
);
2157 mos_parport
->pp
->private_data
= NULL
;
2158 spin_unlock(&release_lock
);
2160 /* wait for synchronous usb calls to return */
2161 if (mos_parport
->msg_pending
)
2162 wait_for_completion_timeout(&mos_parport
->syncmsg_compl
,
2165 parport_remove_port(mos_parport
->pp
);
2166 usb_set_serial_data(serial
, NULL
);
2167 mos_parport
->serial
= NULL
;
2169 /* if tasklet currently scheduled, wait for it to complete */
2170 tasklet_kill(&mos_parport
->urb_tasklet
);
2172 /* unlink any urbs sent by the tasklet */
2173 spin_lock_irqsave(&mos_parport
->listlock
, flags
);
2174 list_for_each_entry(urbtrack
,
2175 &mos_parport
->active_urbs
,
2177 usb_unlink_urb(urbtrack
->urb
);
2178 spin_unlock_irqrestore(&mos_parport
->listlock
, flags
);
2180 kref_put(&mos_parport
->ref_count
, destroy_mos_parport
);
2183 /* free private structure allocated for serial port */
2184 for (i
= 0; i
< serial
->num_ports
; ++i
)
2185 kfree(usb_get_serial_port_data(serial
->port
[i
]));
2188 static struct usb_driver usb_driver
= {
2189 .name
= "moschip7720",
2190 .probe
= usb_serial_probe
,
2191 .disconnect
= usb_serial_disconnect
,
2192 .id_table
= moschip_port_id_table
,
2196 static struct usb_serial_driver moschip7720_2port_driver
= {
2198 .owner
= THIS_MODULE
,
2199 .name
= "moschip7720",
2201 .description
= "Moschip 2 port adapter",
2202 .usb_driver
= &usb_driver
,
2203 .id_table
= moschip_port_id_table
,
2204 .calc_num_ports
= mos77xx_calc_num_ports
,
2205 .open
= mos7720_open
,
2206 .close
= mos7720_close
,
2207 .throttle
= mos7720_throttle
,
2208 .unthrottle
= mos7720_unthrottle
,
2209 .probe
= mos77xx_probe
,
2210 .attach
= mos7720_startup
,
2211 .release
= mos7720_release
,
2212 .ioctl
= mos7720_ioctl
,
2213 .tiocmget
= mos7720_tiocmget
,
2214 .tiocmset
= mos7720_tiocmset
,
2215 .set_termios
= mos7720_set_termios
,
2216 .write
= mos7720_write
,
2217 .write_room
= mos7720_write_room
,
2218 .chars_in_buffer
= mos7720_chars_in_buffer
,
2219 .break_ctl
= mos7720_break
,
2220 .read_bulk_callback
= mos7720_bulk_in_callback
,
2221 .read_int_callback
= NULL
/* dynamically assigned in probe() */
2224 static int __init
moschip7720_init(void)
2228 dbg("%s: Entering ..........", __func__
);
2230 /* Register with the usb serial */
2231 retval
= usb_serial_register(&moschip7720_2port_driver
);
2233 goto failed_port_device_register
;
2235 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
2238 /* Register with the usb */
2239 retval
= usb_register(&usb_driver
);
2241 goto failed_usb_register
;
2245 failed_usb_register
:
2246 usb_serial_deregister(&moschip7720_2port_driver
);
2248 failed_port_device_register
:
2252 static void __exit
moschip7720_exit(void)
2254 usb_deregister(&usb_driver
);
2255 usb_serial_deregister(&moschip7720_2port_driver
);
2258 module_init(moschip7720_init
);
2259 module_exit(moschip7720_exit
);
2261 /* Module information */
2262 MODULE_AUTHOR(DRIVER_AUTHOR
);
2263 MODULE_DESCRIPTION(DRIVER_DESC
);
2264 MODULE_LICENSE("GPL");
2266 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2267 MODULE_PARM_DESC(debug
, "Debug enabled or not");