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perf python: Do not force closing original perf descriptor in evlist.get_pollfd()
[linux/fpc-iii.git] / drivers / usb / serial / mos7720.c
blobfc52ac75fbf66f0f2e7ac2f8951b8df6ea2ba49f
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * mos7720.c
4 * Controls the Moschip 7720 usb to dual port serial converter
5 *
6 * Copyright 2006 Moschip Semiconductor Tech. Ltd.
7 *
8 * Developed by:
9 * Vijaya Kumar <vijaykumar.gn@gmail.com>
10 * Ajay Kumar <naanuajay@yahoo.com>
11 * Gurudeva <ngurudeva@yahoo.com>
12 *
13 * Cleaned up from the original by:
14 * Greg Kroah-Hartman <gregkh@suse.de>
15 *
16 * Originally based on drivers/usb/serial/io_edgeport.c which is:
17 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
18 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
19 */
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/slab.h>
23 #include <linux/tty.h>
24 #include <linux/tty_driver.h>
25 #include <linux/tty_flip.h>
26 #include <linux/module.h>
27 #include <linux/spinlock.h>
28 #include <linux/serial.h>
29 #include <linux/serial_reg.h>
30 #include <linux/usb.h>
31 #include <linux/usb/serial.h>
32 #include <linux/uaccess.h>
33 #include <linux/parport.h>
34
35 #define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
36 #define DRIVER_DESC "Moschip USB Serial Driver"
37
38 /* default urb timeout */
39 #define MOS_WDR_TIMEOUT 5000
40
41 #define MOS_MAX_PORT 0x02
42 #define MOS_WRITE 0x0E
43 #define MOS_READ 0x0D
44
45 /* Interrupt Routines Defines */
46 #define SERIAL_IIR_RLS 0x06
47 #define SERIAL_IIR_RDA 0x04
48 #define SERIAL_IIR_CTI 0x0c
49 #define SERIAL_IIR_THR 0x02
50 #define SERIAL_IIR_MS 0x00
51
52 #define NUM_URBS 16 /* URB Count */
53 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
54
55 /* This structure holds all of the local serial port information */
56 struct moschip_port {
57 __u8 shadowLCR; /* last LCR value received */
58 __u8 shadowMCR; /* last MCR value received */
59 __u8 shadowMSR; /* last MSR value received */
60 char open;
61 struct usb_serial_port *port; /* loop back to the owner */
62 struct urb *write_urb_pool[NUM_URBS];
63 };
64
65 #define USB_VENDOR_ID_MOSCHIP 0x9710
66 #define MOSCHIP_DEVICE_ID_7720 0x7720
67 #define MOSCHIP_DEVICE_ID_7715 0x7715
68
69 static const struct usb_device_id id_table[] = {
70 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) },
71 { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) },
72 { } /* terminating entry */
73 };
74 MODULE_DEVICE_TABLE(usb, id_table);
75
76 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
77
78 /* initial values for parport regs */
79 #define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */
80 #define ECR_INIT_VAL 0x00 /* SPP mode */
81
82 struct urbtracker {
83 struct mos7715_parport *mos_parport;
84 struct list_head urblist_entry;
85 struct kref ref_count;
86 struct urb *urb;
87 struct usb_ctrlrequest *setup;
88 };
89
90 enum mos7715_pp_modes {
91 SPP = 0<<5,
92 PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */
93 PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */
94 };
95
96 struct mos7715_parport {
97 struct parport *pp; /* back to containing struct */
98 struct kref ref_count; /* to instance of this struct */
99 struct list_head deferred_urbs; /* list deferred async urbs */
100 struct list_head active_urbs; /* list async urbs in flight */
101 spinlock_t listlock; /* protects list access */
102 bool msg_pending; /* usb sync call pending */
103 struct completion syncmsg_compl; /* usb sync call completed */
104 struct tasklet_struct urb_tasklet; /* for sending deferred urbs */
105 struct usb_serial *serial; /* back to containing struct */
106 __u8 shadowECR; /* parallel port regs... */
107 __u8 shadowDCR;
108 atomic_t shadowDSR; /* updated in int-in callback */
109 };
110
111 /* lock guards against dereferencing NULL ptr in parport ops callbacks */
112 static DEFINE_SPINLOCK(release_lock);
113
114 #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
115
116 static const unsigned int dummy; /* for clarity in register access fns */
117
118 enum mos_regs {
119 MOS7720_THR, /* serial port regs */
120 MOS7720_RHR,
121 MOS7720_IER,
122 MOS7720_FCR,
123 MOS7720_ISR,
124 MOS7720_LCR,
125 MOS7720_MCR,
126 MOS7720_LSR,
127 MOS7720_MSR,
128 MOS7720_SPR,
129 MOS7720_DLL,
130 MOS7720_DLM,
131 MOS7720_DPR, /* parallel port regs */
132 MOS7720_DSR,
133 MOS7720_DCR,
134 MOS7720_ECR,
135 MOS7720_SP1_REG, /* device control regs */
136 MOS7720_SP2_REG, /* serial port 2 (7720 only) */
137 MOS7720_PP_REG,
138 MOS7720_SP_CONTROL_REG,
139 };
140
141 /*
142 * Return the correct value for the Windex field of the setup packet
143 * for a control endpoint message. See the 7715 datasheet.
144 */
145 static inline __u16 get_reg_index(enum mos_regs reg)
146 {
147 static const __u16 mos7715_index_lookup_table[] = {
148 0x00, /* MOS7720_THR */
149 0x00, /* MOS7720_RHR */
150 0x01, /* MOS7720_IER */
151 0x02, /* MOS7720_FCR */
152 0x02, /* MOS7720_ISR */
153 0x03, /* MOS7720_LCR */
154 0x04, /* MOS7720_MCR */
155 0x05, /* MOS7720_LSR */
156 0x06, /* MOS7720_MSR */
157 0x07, /* MOS7720_SPR */
158 0x00, /* MOS7720_DLL */
159 0x01, /* MOS7720_DLM */
160 0x00, /* MOS7720_DPR */
161 0x01, /* MOS7720_DSR */
162 0x02, /* MOS7720_DCR */
163 0x0a, /* MOS7720_ECR */
164 0x01, /* MOS7720_SP1_REG */
165 0x02, /* MOS7720_SP2_REG (7720 only) */
166 0x04, /* MOS7720_PP_REG (7715 only) */
167 0x08, /* MOS7720_SP_CONTROL_REG */
168 };
169 return mos7715_index_lookup_table[reg];
170 }
171
172 /*
173 * Return the correct value for the upper byte of the Wvalue field of
174 * the setup packet for a control endpoint message.
175 */
176 static inline __u16 get_reg_value(enum mos_regs reg,
177 unsigned int serial_portnum)
178 {
179 if (reg >= MOS7720_SP1_REG) /* control reg */
180 return 0x0000;
181
182 else if (reg >= MOS7720_DPR) /* parallel port reg (7715 only) */
183 return 0x0100;
184
185 else /* serial port reg */
186 return (serial_portnum + 2) << 8;
187 }
188
189 /*
190 * Write data byte to the specified device register. The data is embedded in
191 * the value field of the setup packet. serial_portnum is ignored for registers
192 * not specific to a particular serial port.
193 */
194 static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
195 enum mos_regs reg, __u8 data)
196 {
197 struct usb_device *usbdev = serial->dev;
198 unsigned int pipe = usb_sndctrlpipe(usbdev, 0);
199 __u8 request = (__u8)0x0e;
200 __u8 requesttype = (__u8)0x40;
201 __u16 index = get_reg_index(reg);
202 __u16 value = get_reg_value(reg, serial_portnum) + data;
203 int status = usb_control_msg(usbdev, pipe, request, requesttype, value,
204 index, NULL, 0, MOS_WDR_TIMEOUT);
205 if (status < 0)
206 dev_err(&usbdev->dev,
207 "mos7720: usb_control_msg() failed: %d\n", status);
208 return status;
209 }
210
211 /*
212 * Read data byte from the specified device register. The data returned by the
213 * device is embedded in the value field of the setup packet. serial_portnum is
214 * ignored for registers that are not specific to a particular serial port.
215 */
216 static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
217 enum mos_regs reg, __u8 *data)
218 {
219 struct usb_device *usbdev = serial->dev;
220 unsigned int pipe = usb_rcvctrlpipe(usbdev, 0);
221 __u8 request = (__u8)0x0d;
222 __u8 requesttype = (__u8)0xc0;
223 __u16 index = get_reg_index(reg);
224 __u16 value = get_reg_value(reg, serial_portnum);
225 u8 *buf;
226 int status;
227
228 buf = kmalloc(1, GFP_KERNEL);
229 if (!buf)
230 return -ENOMEM;
231
232 status = usb_control_msg(usbdev, pipe, request, requesttype, value,
233 index, buf, 1, MOS_WDR_TIMEOUT);
234 if (status == 1) {
235 *data = *buf;
236 } else {
237 dev_err(&usbdev->dev,
238 "mos7720: usb_control_msg() failed: %d\n", status);
239 if (status >= 0)
240 status = -EIO;
241 *data = 0;
242 }
243
244 kfree(buf);
245
246 return status;
247 }
248
249 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
250
251 static inline int mos7715_change_mode(struct mos7715_parport *mos_parport,
252 enum mos7715_pp_modes mode)
253 {
254 mos_parport->shadowECR = mode;
255 write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR,
256 mos_parport->shadowECR);
257 return 0;
258 }
259
260 static void destroy_mos_parport(struct kref *kref)
261 {
262 struct mos7715_parport *mos_parport =
263 container_of(kref, struct mos7715_parport, ref_count);
264
265 kfree(mos_parport);
266 }
267
268 static void destroy_urbtracker(struct kref *kref)
269 {
270 struct urbtracker *urbtrack =
271 container_of(kref, struct urbtracker, ref_count);
272 struct mos7715_parport *mos_parport = urbtrack->mos_parport;
273
274 usb_free_urb(urbtrack->urb);
275 kfree(urbtrack->setup);
276 kfree(urbtrack);
277 kref_put(&mos_parport->ref_count, destroy_mos_parport);
278 }
279
280 /*
281 * This runs as a tasklet when sending an urb in a non-blocking parallel
282 * port callback had to be deferred because the disconnect mutex could not be
283 * obtained at the time.
284 */
285 static void send_deferred_urbs(unsigned long _mos_parport)
286 {
287 int ret_val;
288 unsigned long flags;
289 struct mos7715_parport *mos_parport = (void *)_mos_parport;
290 struct urbtracker *urbtrack, *tmp;
291 struct list_head *cursor, *next;
292 struct device *dev;
293
294 /* if release function ran, game over */
295 if (unlikely(mos_parport->serial == NULL))
296 return;
297
298 dev = &mos_parport->serial->dev->dev;
299
300 /* try again to get the mutex */
301 if (!mutex_trylock(&mos_parport->serial->disc_mutex)) {
302 dev_dbg(dev, "%s: rescheduling tasklet\n", __func__);
303 tasklet_schedule(&mos_parport->urb_tasklet);
304 return;
305 }
306
307 /* if device disconnected, game over */
308 if (unlikely(mos_parport->serial->disconnected)) {
309 mutex_unlock(&mos_parport->serial->disc_mutex);
310 return;
311 }
312
313 spin_lock_irqsave(&mos_parport->listlock, flags);
314 if (list_empty(&mos_parport->deferred_urbs)) {
315 spin_unlock_irqrestore(&mos_parport->listlock, flags);
316 mutex_unlock(&mos_parport->serial->disc_mutex);
317 dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__);
318 return;
319 }
320
321 /* move contents of deferred_urbs list to active_urbs list and submit */
322 list_for_each_safe(cursor, next, &mos_parport->deferred_urbs)
323 list_move_tail(cursor, &mos_parport->active_urbs);
324 list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs,
325 urblist_entry) {
326 ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC);
327 dev_dbg(dev, "%s: urb submitted\n", __func__);
328 if (ret_val) {
329 dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val);
330 list_del(&urbtrack->urblist_entry);
331 kref_put(&urbtrack->ref_count, destroy_urbtracker);
332 }
333 }
334 spin_unlock_irqrestore(&mos_parport->listlock, flags);
335 mutex_unlock(&mos_parport->serial->disc_mutex);
336 }
337
338 /* callback for parallel port control urbs submitted asynchronously */
339 static void async_complete(struct urb *urb)
340 {
341 struct urbtracker *urbtrack = urb->context;
342 int status = urb->status;
343 unsigned long flags;
344
345 if (unlikely(status))
346 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
347
348 /* remove the urbtracker from the active_urbs list */
349 spin_lock_irqsave(&urbtrack->mos_parport->listlock, flags);
350 list_del(&urbtrack->urblist_entry);
351 spin_unlock_irqrestore(&urbtrack->mos_parport->listlock, flags);
352 kref_put(&urbtrack->ref_count, destroy_urbtracker);
353 }
354
355 static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport,
356 enum mos_regs reg, __u8 data)
357 {
358 struct urbtracker *urbtrack;
359 int ret_val;
360 unsigned long flags;
361 struct usb_serial *serial = mos_parport->serial;
362 struct usb_device *usbdev = serial->dev;
363
364 /* create and initialize the control urb and containing urbtracker */
365 urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC);
366 if (!urbtrack)
367 return -ENOMEM;
368
369 kref_get(&mos_parport->ref_count);
370 urbtrack->mos_parport = mos_parport;
371 urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC);
372 if (!urbtrack->urb) {
373 kfree(urbtrack);
374 return -ENOMEM;
375 }
376 urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC);
377 if (!urbtrack->setup) {
378 usb_free_urb(urbtrack->urb);
379 kfree(urbtrack);
380 return -ENOMEM;
381 }
382 urbtrack->setup->bRequestType = (__u8)0x40;
383 urbtrack->setup->bRequest = (__u8)0x0e;
384 urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy));
385 urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg));
386 urbtrack->setup->wLength = 0;
387 usb_fill_control_urb(urbtrack->urb, usbdev,
388 usb_sndctrlpipe(usbdev, 0),
389 (unsigned char *)urbtrack->setup,
390 NULL, 0, async_complete, urbtrack);
391 kref_init(&urbtrack->ref_count);
392 INIT_LIST_HEAD(&urbtrack->urblist_entry);
393
394 /*
395 * get the disconnect mutex, or add tracker to the deferred_urbs list
396 * and schedule a tasklet to try again later
397 */
398 if (!mutex_trylock(&serial->disc_mutex)) {
399 spin_lock_irqsave(&mos_parport->listlock, flags);
400 list_add_tail(&urbtrack->urblist_entry,
401 &mos_parport->deferred_urbs);
402 spin_unlock_irqrestore(&mos_parport->listlock, flags);
403 tasklet_schedule(&mos_parport->urb_tasklet);
404 dev_dbg(&usbdev->dev, "tasklet scheduled\n");
405 return 0;
406 }
407
408 /* bail if device disconnected */
409 if (serial->disconnected) {
410 kref_put(&urbtrack->ref_count, destroy_urbtracker);
411 mutex_unlock(&serial->disc_mutex);
412 return -ENODEV;
413 }
414
415 /* add the tracker to the active_urbs list and submit */
416 spin_lock_irqsave(&mos_parport->listlock, flags);
417 list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs);
418 spin_unlock_irqrestore(&mos_parport->listlock, flags);
419 ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC);
420 mutex_unlock(&serial->disc_mutex);
421 if (ret_val) {
422 dev_err(&usbdev->dev,
423 "%s: submit_urb() failed: %d\n", __func__, ret_val);
424 spin_lock_irqsave(&mos_parport->listlock, flags);
425 list_del(&urbtrack->urblist_entry);
426 spin_unlock_irqrestore(&mos_parport->listlock, flags);
427 kref_put(&urbtrack->ref_count, destroy_urbtracker);
428 return ret_val;
429 }
430 return 0;
431 }
432
433 /*
434 * This is the the common top part of all parallel port callback operations that
435 * send synchronous messages to the device. This implements convoluted locking
436 * that avoids two scenarios: (1) a port operation is called after usbserial
437 * has called our release function, at which point struct mos7715_parport has
438 * been destroyed, and (2) the device has been disconnected, but usbserial has
439 * not called the release function yet because someone has a serial port open.
440 * The shared release_lock prevents the first, and the mutex and disconnected
441 * flag maintained by usbserial covers the second. We also use the msg_pending
442 * flag to ensure that all synchronous usb message calls have completed before
443 * our release function can return.
444 */
445 static int parport_prologue(struct parport *pp)
446 {
447 struct mos7715_parport *mos_parport;
448
449 spin_lock(&release_lock);
450 mos_parport = pp->private_data;
451 if (unlikely(mos_parport == NULL)) {
452 /* release fn called, port struct destroyed */
453 spin_unlock(&release_lock);
454 return -1;
455 }
456 mos_parport->msg_pending = true; /* synch usb call pending */
457 reinit_completion(&mos_parport->syncmsg_compl);
458 spin_unlock(&release_lock);
459
460 mutex_lock(&mos_parport->serial->disc_mutex);
461 if (mos_parport->serial->disconnected) {
462 /* device disconnected */
463 mutex_unlock(&mos_parport->serial->disc_mutex);
464 mos_parport->msg_pending = false;
465 complete(&mos_parport->syncmsg_compl);
466 return -1;
467 }
468
469 return 0;
470 }
471
472 /*
473 * This is the common bottom part of all parallel port functions that send
474 * synchronous messages to the device.
475 */
476 static inline void parport_epilogue(struct parport *pp)
477 {
478 struct mos7715_parport *mos_parport = pp->private_data;
479 mutex_unlock(&mos_parport->serial->disc_mutex);
480 mos_parport->msg_pending = false;
481 complete(&mos_parport->syncmsg_compl);
482 }
483
484 static void parport_mos7715_write_data(struct parport *pp, unsigned char d)
485 {
486 struct mos7715_parport *mos_parport = pp->private_data;
487
488 if (parport_prologue(pp) < 0)
489 return;
490 mos7715_change_mode(mos_parport, SPP);
491 write_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, (__u8)d);
492 parport_epilogue(pp);
493 }
494
495 static unsigned char parport_mos7715_read_data(struct parport *pp)
496 {
497 struct mos7715_parport *mos_parport = pp->private_data;
498 unsigned char d;
499
500 if (parport_prologue(pp) < 0)
501 return 0;
502 read_mos_reg(mos_parport->serial, dummy, MOS7720_DPR, &d);
503 parport_epilogue(pp);
504 return d;
505 }
506
507 static void parport_mos7715_write_control(struct parport *pp, unsigned char d)
508 {
509 struct mos7715_parport *mos_parport = pp->private_data;
510 __u8 data;
511
512 if (parport_prologue(pp) < 0)
513 return;
514 data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0);
515 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR, data);
516 mos_parport->shadowDCR = data;
517 parport_epilogue(pp);
518 }
519
520 static unsigned char parport_mos7715_read_control(struct parport *pp)
521 {
522 struct mos7715_parport *mos_parport;
523 __u8 dcr;
524
525 spin_lock(&release_lock);
526 mos_parport = pp->private_data;
527 if (unlikely(mos_parport == NULL)) {
528 spin_unlock(&release_lock);
529 return 0;
530 }
531 dcr = mos_parport->shadowDCR & 0x0f;
532 spin_unlock(&release_lock);
533 return dcr;
534 }
535
536 static unsigned char parport_mos7715_frob_control(struct parport *pp,
537 unsigned char mask,
538 unsigned char val)
539 {
540 struct mos7715_parport *mos_parport = pp->private_data;
541 __u8 dcr;
542
543 mask &= 0x0f;
544 val &= 0x0f;
545 if (parport_prologue(pp) < 0)
546 return 0;
547 mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val;
548 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR,
549 mos_parport->shadowDCR);
550 dcr = mos_parport->shadowDCR & 0x0f;
551 parport_epilogue(pp);
552 return dcr;
553 }
554
555 static unsigned char parport_mos7715_read_status(struct parport *pp)
556 {
557 unsigned char status;
558 struct mos7715_parport *mos_parport;
559
560 spin_lock(&release_lock);
561 mos_parport = pp->private_data;
562 if (unlikely(mos_parport == NULL)) { /* release called */
563 spin_unlock(&release_lock);
564 return 0;
565 }
566 status = atomic_read(&mos_parport->shadowDSR) & 0xf8;
567 spin_unlock(&release_lock);
568 return status;
569 }
570
571 static void parport_mos7715_enable_irq(struct parport *pp)
572 {
573 }
574
575 static void parport_mos7715_disable_irq(struct parport *pp)
576 {
577 }
578
579 static void parport_mos7715_data_forward(struct parport *pp)
580 {
581 struct mos7715_parport *mos_parport = pp->private_data;
582
583 if (parport_prologue(pp) < 0)
584 return;
585 mos7715_change_mode(mos_parport, PS2);
586 mos_parport->shadowDCR &= ~0x20;
587 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR,
588 mos_parport->shadowDCR);
589 parport_epilogue(pp);
590 }
591
592 static void parport_mos7715_data_reverse(struct parport *pp)
593 {
594 struct mos7715_parport *mos_parport = pp->private_data;
595
596 if (parport_prologue(pp) < 0)
597 return;
598 mos7715_change_mode(mos_parport, PS2);
599 mos_parport->shadowDCR |= 0x20;
600 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR,
601 mos_parport->shadowDCR);
602 parport_epilogue(pp);
603 }
604
605 static void parport_mos7715_init_state(struct pardevice *dev,
606 struct parport_state *s)
607 {
608 s->u.pc.ctr = DCR_INIT_VAL;
609 s->u.pc.ecr = ECR_INIT_VAL;
610 }
611
612 /* N.B. Parport core code requires that this function not block */
613 static void parport_mos7715_save_state(struct parport *pp,
614 struct parport_state *s)
615 {
616 struct mos7715_parport *mos_parport;
617
618 spin_lock(&release_lock);
619 mos_parport = pp->private_data;
620 if (unlikely(mos_parport == NULL)) { /* release called */
621 spin_unlock(&release_lock);
622 return;
623 }
624 s->u.pc.ctr = mos_parport->shadowDCR;
625 s->u.pc.ecr = mos_parport->shadowECR;
626 spin_unlock(&release_lock);
627 }
628
629 /* N.B. Parport core code requires that this function not block */
630 static void parport_mos7715_restore_state(struct parport *pp,
631 struct parport_state *s)
632 {
633 struct mos7715_parport *mos_parport;
634
635 spin_lock(&release_lock);
636 mos_parport = pp->private_data;
637 if (unlikely(mos_parport == NULL)) { /* release called */
638 spin_unlock(&release_lock);
639 return;
640 }
641 write_parport_reg_nonblock(mos_parport, MOS7720_DCR,
642 mos_parport->shadowDCR);
643 write_parport_reg_nonblock(mos_parport, MOS7720_ECR,
644 mos_parport->shadowECR);
645 spin_unlock(&release_lock);
646 }
647
648 static size_t parport_mos7715_write_compat(struct parport *pp,
649 const void *buffer,
650 size_t len, int flags)
651 {
652 int retval;
653 struct mos7715_parport *mos_parport = pp->private_data;
654 int actual_len;
655
656 if (parport_prologue(pp) < 0)
657 return 0;
658 mos7715_change_mode(mos_parport, PPF);
659 retval = usb_bulk_msg(mos_parport->serial->dev,
660 usb_sndbulkpipe(mos_parport->serial->dev, 2),
661 (void *)buffer, len, &actual_len,
662 MOS_WDR_TIMEOUT);
663 parport_epilogue(pp);
664 if (retval) {
665 dev_err(&mos_parport->serial->dev->dev,
666 "mos7720: usb_bulk_msg() failed: %d\n", retval);
667 return 0;
668 }
669 return actual_len;
670 }
671
672 static struct parport_operations parport_mos7715_ops = {
673 .owner = THIS_MODULE,
674 .write_data = parport_mos7715_write_data,
675 .read_data = parport_mos7715_read_data,
676
677 .write_control = parport_mos7715_write_control,
678 .read_control = parport_mos7715_read_control,
679 .frob_control = parport_mos7715_frob_control,
680
681 .read_status = parport_mos7715_read_status,
682
683 .enable_irq = parport_mos7715_enable_irq,
684 .disable_irq = parport_mos7715_disable_irq,
685
686 .data_forward = parport_mos7715_data_forward,
687 .data_reverse = parport_mos7715_data_reverse,
688
689 .init_state = parport_mos7715_init_state,
690 .save_state = parport_mos7715_save_state,
691 .restore_state = parport_mos7715_restore_state,
692
693 .compat_write_data = parport_mos7715_write_compat,
694
695 .nibble_read_data = parport_ieee1284_read_nibble,
696 .byte_read_data = parport_ieee1284_read_byte,
697 };
698
699 /*
700 * Allocate and initialize parallel port control struct, initialize
701 * the parallel port hardware device, and register with the parport subsystem.
702 */
703 static int mos7715_parport_init(struct usb_serial *serial)
704 {
705 struct mos7715_parport *mos_parport;
706
707 /* allocate and initialize parallel port control struct */
708 mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL);
709 if (!mos_parport)
710 return -ENOMEM;
711
712 mos_parport->msg_pending = false;
713 kref_init(&mos_parport->ref_count);
714 spin_lock_init(&mos_parport->listlock);
715 INIT_LIST_HEAD(&mos_parport->active_urbs);
716 INIT_LIST_HEAD(&mos_parport->deferred_urbs);
717 usb_set_serial_data(serial, mos_parport); /* hijack private pointer */
718 mos_parport->serial = serial;
719 tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs,
720 (unsigned long) mos_parport);
721 init_completion(&mos_parport->syncmsg_compl);
722
723 /* cycle parallel port reset bit */
724 write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x80);
725 write_mos_reg(mos_parport->serial, dummy, MOS7720_PP_REG, (__u8)0x00);
726
727 /* initialize device registers */
728 mos_parport->shadowDCR = DCR_INIT_VAL;
729 write_mos_reg(mos_parport->serial, dummy, MOS7720_DCR,
730 mos_parport->shadowDCR);
731 mos_parport->shadowECR = ECR_INIT_VAL;
732 write_mos_reg(mos_parport->serial, dummy, MOS7720_ECR,
733 mos_parport->shadowECR);
734
735 /* register with parport core */
736 mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE,
737 PARPORT_DMA_NONE,
738 &parport_mos7715_ops);
739 if (mos_parport->pp == NULL) {
740 dev_err(&serial->interface->dev,
741 "Could not register parport\n");
742 kref_put(&mos_parport->ref_count, destroy_mos_parport);
743 return -EIO;
744 }
745 mos_parport->pp->private_data = mos_parport;
746 mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP;
747 mos_parport->pp->dev = &serial->interface->dev;
748 parport_announce_port(mos_parport->pp);
749
750 return 0;
751 }
752 #endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
753
754 /*
755 * mos7720_interrupt_callback
756 * this is the callback function for when we have received data on the
757 * interrupt endpoint.
758 */
759 static void mos7720_interrupt_callback(struct urb *urb)
760 {
761 int result;
762 int length;
763 int status = urb->status;
764 struct device *dev = &urb->dev->dev;
765 __u8 *data;
766 __u8 sp1;
767 __u8 sp2;
768
769 switch (status) {
770 case 0:
771 /* success */
772 break;
773 case -ECONNRESET:
774 case -ENOENT:
775 case -ESHUTDOWN:
776 /* this urb is terminated, clean up */
777 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
778 return;
779 default:
780 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
781 goto exit;
782 }
783
784 length = urb->actual_length;
785 data = urb->transfer_buffer;
786
787 /* Moschip get 4 bytes
788 * Byte 1 IIR Port 1 (port.number is 0)
789 * Byte 2 IIR Port 2 (port.number is 1)
790 * Byte 3 --------------
791 * Byte 4 FIFO status for both */
792
793 /* the above description is inverted
794 * oneukum 2007-03-14 */
795
796 if (unlikely(length != 4)) {
797 dev_dbg(dev, "Wrong data !!!\n");
798 return;
799 }
800
801 sp1 = data[3];
802 sp2 = data[2];
803
804 if ((sp1 | sp2) & 0x01) {
805 /* No Interrupt Pending in both the ports */
806 dev_dbg(dev, "No Interrupt !!!\n");
807 } else {
808 switch (sp1 & 0x0f) {
809 case SERIAL_IIR_RLS:
810 dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n");
811 break;
812 case SERIAL_IIR_CTI:
813 dev_dbg(dev, "Serial Port 1: Receiver time out\n");
814 break;
815 case SERIAL_IIR_MS:
816 /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */
817 break;
818 }
819
820 switch (sp2 & 0x0f) {
821 case SERIAL_IIR_RLS:
822 dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n");
823 break;
824 case SERIAL_IIR_CTI:
825 dev_dbg(dev, "Serial Port 2: Receiver time out\n");
826 break;
827 case SERIAL_IIR_MS:
828 /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */
829 break;
830 }
831 }
832
833 exit:
834 result = usb_submit_urb(urb, GFP_ATOMIC);
835 if (result)
836 dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result);
837 }
838
839 /*
840 * mos7715_interrupt_callback
841 * this is the 7715's callback function for when we have received data on
842 * the interrupt endpoint.
843 */
844 static void mos7715_interrupt_callback(struct urb *urb)
845 {
846 int result;
847 int length;
848 int status = urb->status;
849 struct device *dev = &urb->dev->dev;
850 __u8 *data;
851 __u8 iir;
852
853 switch (status) {
854 case 0:
855 /* success */
856 break;
857 case -ECONNRESET:
858 case -ENOENT:
859 case -ESHUTDOWN:
860 case -ENODEV:
861 /* this urb is terminated, clean up */
862 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
863 return;
864 default:
865 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
866 goto exit;
867 }
868
869 length = urb->actual_length;
870 data = urb->transfer_buffer;
871
872 /* Structure of data from 7715 device:
873 * Byte 1: IIR serial Port
874 * Byte 2: unused
875 * Byte 2: DSR parallel port
876 * Byte 4: FIFO status for both */
877
878 if (unlikely(length != 4)) {
879 dev_dbg(dev, "Wrong data !!!\n");
880 return;
881 }
882
883 iir = data[0];
884 if (!(iir & 0x01)) { /* serial port interrupt pending */
885 switch (iir & 0x0f) {
886 case SERIAL_IIR_RLS:
887 dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n");
888 break;
889 case SERIAL_IIR_CTI:
890 dev_dbg(dev, "Serial Port: Receiver time out\n");
891 break;
892 case SERIAL_IIR_MS:
893 /* dev_dbg(dev, "Serial Port: Modem status change\n"); */
894 break;
895 }
896 }
897
898 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
899 { /* update local copy of DSR reg */
900 struct usb_serial_port *port = urb->context;
901 struct mos7715_parport *mos_parport = port->serial->private;
902 if (unlikely(mos_parport == NULL))
903 return;
904 atomic_set(&mos_parport->shadowDSR, data[2]);
905 }
906 #endif
907
908 exit:
909 result = usb_submit_urb(urb, GFP_ATOMIC);
910 if (result)
911 dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result);
912 }
913
914 /*
915 * mos7720_bulk_in_callback
916 * this is the callback function for when we have received data on the
917 * bulk in endpoint.
918 */
919 static void mos7720_bulk_in_callback(struct urb *urb)
920 {
921 int retval;
922 unsigned char *data ;
923 struct usb_serial_port *port;
924 int status = urb->status;
925
926 if (status) {
927 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
928 return;
929 }
930
931 port = urb->context;
932
933 dev_dbg(&port->dev, "Entering...%s\n", __func__);
934
935 data = urb->transfer_buffer;
936
937 if (urb->actual_length) {
938 tty_insert_flip_string(&port->port, data, urb->actual_length);
939 tty_flip_buffer_push(&port->port);
940 }
941
942 if (port->read_urb->status != -EINPROGRESS) {
943 retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
944 if (retval)
945 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
946 }
947 }
948
949 /*
950 * mos7720_bulk_out_data_callback
951 * this is the callback function for when we have finished sending serial
952 * data on the bulk out endpoint.
953 */
954 static void mos7720_bulk_out_data_callback(struct urb *urb)
955 {
956 struct moschip_port *mos7720_port;
957 int status = urb->status;
958
959 if (status) {
960 dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status);
961 return;
962 }
963
964 mos7720_port = urb->context;
965 if (!mos7720_port) {
966 dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n");
967 return ;
968 }
969
970 if (mos7720_port->open)
971 tty_port_tty_wakeup(&mos7720_port->port->port);
972 }
973
974 static int mos77xx_calc_num_ports(struct usb_serial *serial,
975 struct usb_serial_endpoints *epds)
976 {
977 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
978
979 if (product == MOSCHIP_DEVICE_ID_7715) {
980 /*
981 * The 7715 uses the first bulk in/out endpoint pair for the
982 * parallel port, and the second for the serial port. We swap
983 * the endpoint descriptors here so that the the first and
984 * only registered port structure uses the serial-port
985 * endpoints.
986 */
987 swap(epds->bulk_in[0], epds->bulk_in[1]);
988 swap(epds->bulk_out[0], epds->bulk_out[1]);
989
990 return 1;
991 }
992
993 return 2;
994 }
995
996 static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
997 {
998 struct usb_serial *serial;
999 struct urb *urb;
1000 struct moschip_port *mos7720_port;
1001 int response;
1002 int port_number;
1003 __u8 data;
1004 int allocated_urbs = 0;
1005 int j;
1006
1007 serial = port->serial;
1008
1009 mos7720_port = usb_get_serial_port_data(port);
1010 if (mos7720_port == NULL)
1011 return -ENODEV;
1012
1013 usb_clear_halt(serial->dev, port->write_urb->pipe);
1014 usb_clear_halt(serial->dev, port->read_urb->pipe);
1015
1016 /* Initialising the write urb pool */
1017 for (j = 0; j < NUM_URBS; ++j) {
1018 urb = usb_alloc_urb(0, GFP_KERNEL);
1019 mos7720_port->write_urb_pool[j] = urb;
1020 if (!urb)
1021 continue;
1022
1023 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
1024 GFP_KERNEL);
1025 if (!urb->transfer_buffer) {
1026 usb_free_urb(mos7720_port->write_urb_pool[j]);
1027 mos7720_port->write_urb_pool[j] = NULL;
1028 continue;
1029 }
1030 allocated_urbs++;
1031 }
1032
1033 if (!allocated_urbs)
1034 return -ENOMEM;
1035
1036 /* Initialize MCS7720 -- Write Init values to corresponding Registers
1037 *
1038 * Register Index
1039 * 0 : MOS7720_THR/MOS7720_RHR
1040 * 1 : MOS7720_IER
1041 * 2 : MOS7720_FCR
1042 * 3 : MOS7720_LCR
1043 * 4 : MOS7720_MCR
1044 * 5 : MOS7720_LSR
1045 * 6 : MOS7720_MSR
1046 * 7 : MOS7720_SPR
1047 *
1048 * 0x08 : SP1/2 Control Reg
1049 */
1050 port_number = port->port_number;
1051 read_mos_reg(serial, port_number, MOS7720_LSR, &data);
1052
1053 dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data);
1054
1055 write_mos_reg(serial, dummy, MOS7720_SP1_REG, 0x02);
1056 write_mos_reg(serial, dummy, MOS7720_SP2_REG, 0x02);
1057
1058 write_mos_reg(serial, port_number, MOS7720_IER, 0x00);
1059 write_mos_reg(serial, port_number, MOS7720_FCR, 0x00);
1060
1061 write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf);
1062 mos7720_port->shadowLCR = 0x03;
1063 write_mos_reg(serial, port_number, MOS7720_LCR,
1064 mos7720_port->shadowLCR);
1065 mos7720_port->shadowMCR = 0x0b;
1066 write_mos_reg(serial, port_number, MOS7720_MCR,
1067 mos7720_port->shadowMCR);
1068
1069 write_mos_reg(serial, port_number, MOS7720_SP_CONTROL_REG, 0x00);
1070 read_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, &data);
1071 data = data | (port->port_number + 1);
1072 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, data);
1073 mos7720_port->shadowLCR = 0x83;
1074 write_mos_reg(serial, port_number, MOS7720_LCR,
1075 mos7720_port->shadowLCR);
1076 write_mos_reg(serial, port_number, MOS7720_THR, 0x0c);
1077 write_mos_reg(serial, port_number, MOS7720_IER, 0x00);
1078 mos7720_port->shadowLCR = 0x03;
1079 write_mos_reg(serial, port_number, MOS7720_LCR,
1080 mos7720_port->shadowLCR);
1081 write_mos_reg(serial, port_number, MOS7720_IER, 0x0c);
1082
1083 response = usb_submit_urb(port->read_urb, GFP_KERNEL);
1084 if (response)
1085 dev_err(&port->dev, "%s - Error %d submitting read urb\n",
1086 __func__, response);
1087
1088 /* initialize our port settings */
1089 mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
1090
1091 /* send a open port command */
1092 mos7720_port->open = 1;
1093
1094 return 0;
1095 }
1096
1097 /*
1098 * mos7720_chars_in_buffer
1099 * this function is called by the tty driver when it wants to know how many
1100 * bytes of data we currently have outstanding in the port (data that has
1101 * been written, but hasn't made it out the port yet)
1102 * If successful, we return the number of bytes left to be written in the
1103 * system,
1104 * Otherwise we return a negative error number.
1105 */
1106 static int mos7720_chars_in_buffer(struct tty_struct *tty)
1107 {
1108 struct usb_serial_port *port = tty->driver_data;
1109 int i;
1110 int chars = 0;
1111 struct moschip_port *mos7720_port;
1112
1113 mos7720_port = usb_get_serial_port_data(port);
1114 if (mos7720_port == NULL)
1115 return 0;
1116
1117 for (i = 0; i < NUM_URBS; ++i) {
1118 if (mos7720_port->write_urb_pool[i] &&
1119 mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
1120 chars += URB_TRANSFER_BUFFER_SIZE;
1121 }
1122 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1123 return chars;
1124 }
1125
1126 static void mos7720_close(struct usb_serial_port *port)
1127 {
1128 struct usb_serial *serial;
1129 struct moschip_port *mos7720_port;
1130 int j;
1131
1132 serial = port->serial;
1133
1134 mos7720_port = usb_get_serial_port_data(port);
1135 if (mos7720_port == NULL)
1136 return;
1137
1138 for (j = 0; j < NUM_URBS; ++j)
1139 usb_kill_urb(mos7720_port->write_urb_pool[j]);
1140
1141 /* Freeing Write URBs */
1142 for (j = 0; j < NUM_URBS; ++j) {
1143 if (mos7720_port->write_urb_pool[j]) {
1144 kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
1145 usb_free_urb(mos7720_port->write_urb_pool[j]);
1146 }
1147 }
1148
1149 /* While closing port, shutdown all bulk read, write *
1150 * and interrupt read if they exists, otherwise nop */
1151 usb_kill_urb(port->write_urb);
1152 usb_kill_urb(port->read_urb);
1153
1154 write_mos_reg(serial, port->port_number, MOS7720_MCR, 0x00);
1155 write_mos_reg(serial, port->port_number, MOS7720_IER, 0x00);
1156
1157 mos7720_port->open = 0;
1158 }
1159
1160 static void mos7720_break(struct tty_struct *tty, int break_state)
1161 {
1162 struct usb_serial_port *port = tty->driver_data;
1163 unsigned char data;
1164 struct usb_serial *serial;
1165 struct moschip_port *mos7720_port;
1166
1167 serial = port->serial;
1168
1169 mos7720_port = usb_get_serial_port_data(port);
1170 if (mos7720_port == NULL)
1171 return;
1172
1173 if (break_state == -1)
1174 data = mos7720_port->shadowLCR | UART_LCR_SBC;
1175 else
1176 data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
1177
1178 mos7720_port->shadowLCR = data;
1179 write_mos_reg(serial, port->port_number, MOS7720_LCR,
1180 mos7720_port->shadowLCR);
1181 }
1182
1183 /*
1184 * mos7720_write_room
1185 * this function is called by the tty driver when it wants to know how many
1186 * bytes of data we can accept for a specific port.
1187 * If successful, we return the amount of room that we have for this port
1188 * Otherwise we return a negative error number.
1189 */
1190 static int mos7720_write_room(struct tty_struct *tty)
1191 {
1192 struct usb_serial_port *port = tty->driver_data;
1193 struct moschip_port *mos7720_port;
1194 int room = 0;
1195 int i;
1196
1197 mos7720_port = usb_get_serial_port_data(port);
1198 if (mos7720_port == NULL)
1199 return -ENODEV;
1200
1201 /* FIXME: Locking */
1202 for (i = 0; i < NUM_URBS; ++i) {
1203 if (mos7720_port->write_urb_pool[i] &&
1204 mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
1205 room += URB_TRANSFER_BUFFER_SIZE;
1206 }
1207
1208 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1209 return room;
1210 }
1211
1212 static int mos7720_write(struct tty_struct *tty, struct usb_serial_port *port,
1213 const unsigned char *data, int count)
1214 {
1215 int status;
1216 int i;
1217 int bytes_sent = 0;
1218 int transfer_size;
1219
1220 struct moschip_port *mos7720_port;
1221 struct usb_serial *serial;
1222 struct urb *urb;
1223 const unsigned char *current_position = data;
1224
1225 serial = port->serial;
1226
1227 mos7720_port = usb_get_serial_port_data(port);
1228 if (mos7720_port == NULL)
1229 return -ENODEV;
1230
1231 /* try to find a free urb in the list */
1232 urb = NULL;
1233
1234 for (i = 0; i < NUM_URBS; ++i) {
1235 if (mos7720_port->write_urb_pool[i] &&
1236 mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
1237 urb = mos7720_port->write_urb_pool[i];
1238 dev_dbg(&port->dev, "URB:%d\n", i);
1239 break;
1240 }
1241 }
1242
1243 if (urb == NULL) {
1244 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1245 goto exit;
1246 }
1247
1248 if (urb->transfer_buffer == NULL) {
1249 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
1250 GFP_ATOMIC);
1251 if (!urb->transfer_buffer)
1252 goto exit;
1253 }
1254 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1255
1256 memcpy(urb->transfer_buffer, current_position, transfer_size);
1257 usb_serial_debug_data(&port->dev, __func__, transfer_size,
1258 urb->transfer_buffer);
1259
1260 /* fill urb with data and submit */
1261 usb_fill_bulk_urb(urb, serial->dev,
1262 usb_sndbulkpipe(serial->dev,
1263 port->bulk_out_endpointAddress),
1264 urb->transfer_buffer, transfer_size,
1265 mos7720_bulk_out_data_callback, mos7720_port);
1266
1267 /* send it down the pipe */
1268 status = usb_submit_urb(urb, GFP_ATOMIC);
1269 if (status) {
1270 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1271 "with status = %d\n", __func__, status);
1272 bytes_sent = status;
1273 goto exit;
1274 }
1275 bytes_sent = transfer_size;
1276
1277 exit:
1278 return bytes_sent;
1279 }
1280
1281 static void mos7720_throttle(struct tty_struct *tty)
1282 {
1283 struct usb_serial_port *port = tty->driver_data;
1284 struct moschip_port *mos7720_port;
1285 int status;
1286
1287 mos7720_port = usb_get_serial_port_data(port);
1288
1289 if (mos7720_port == NULL)
1290 return;
1291
1292 if (!mos7720_port->open) {
1293 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1294 return;
1295 }
1296
1297 /* if we are implementing XON/XOFF, send the stop character */
1298 if (I_IXOFF(tty)) {
1299 unsigned char stop_char = STOP_CHAR(tty);
1300 status = mos7720_write(tty, port, &stop_char, 1);
1301 if (status <= 0)
1302 return;
1303 }
1304
1305 /* if we are implementing RTS/CTS, toggle that line */
1306 if (C_CRTSCTS(tty)) {
1307 mos7720_port->shadowMCR &= ~UART_MCR_RTS;
1308 write_mos_reg(port->serial, port->port_number, MOS7720_MCR,
1309 mos7720_port->shadowMCR);
1310 }
1311 }
1312
1313 static void mos7720_unthrottle(struct tty_struct *tty)
1314 {
1315 struct usb_serial_port *port = tty->driver_data;
1316 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
1317 int status;
1318
1319 if (mos7720_port == NULL)
1320 return;
1321
1322 if (!mos7720_port->open) {
1323 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1324 return;
1325 }
1326
1327 /* if we are implementing XON/XOFF, send the start character */
1328 if (I_IXOFF(tty)) {
1329 unsigned char start_char = START_CHAR(tty);
1330 status = mos7720_write(tty, port, &start_char, 1);
1331 if (status <= 0)
1332 return;
1333 }
1334
1335 /* if we are implementing RTS/CTS, toggle that line */
1336 if (C_CRTSCTS(tty)) {
1337 mos7720_port->shadowMCR |= UART_MCR_RTS;
1338 write_mos_reg(port->serial, port->port_number, MOS7720_MCR,
1339 mos7720_port->shadowMCR);
1340 }
1341 }
1342
1343 /* FIXME: this function does not work */
1344 static int set_higher_rates(struct moschip_port *mos7720_port,
1345 unsigned int baud)
1346 {
1347 struct usb_serial_port *port;
1348 struct usb_serial *serial;
1349 int port_number;
1350 enum mos_regs sp_reg;
1351 if (mos7720_port == NULL)
1352 return -EINVAL;
1353
1354 port = mos7720_port->port;
1355 serial = port->serial;
1356
1357 /***********************************************
1358 * Init Sequence for higher rates
1359 ***********************************************/
1360 dev_dbg(&port->dev, "Sending Setting Commands ..........\n");
1361 port_number = port->port_number;
1362
1363 write_mos_reg(serial, port_number, MOS7720_IER, 0x00);
1364 write_mos_reg(serial, port_number, MOS7720_FCR, 0x00);
1365 write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf);
1366 mos7720_port->shadowMCR = 0x0b;
1367 write_mos_reg(serial, port_number, MOS7720_MCR,
1368 mos7720_port->shadowMCR);
1369 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x00);
1370
1371 /***********************************************
1372 * Set for higher rates *
1373 ***********************************************/
1374 /* writing baud rate verbatum into uart clock field clearly not right */
1375 if (port_number == 0)
1376 sp_reg = MOS7720_SP1_REG;
1377 else
1378 sp_reg = MOS7720_SP2_REG;
1379 write_mos_reg(serial, dummy, sp_reg, baud * 0x10);
1380 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG, 0x03);
1381 mos7720_port->shadowMCR = 0x2b;
1382 write_mos_reg(serial, port_number, MOS7720_MCR,
1383 mos7720_port->shadowMCR);
1384
1385 /***********************************************
1386 * Set DLL/DLM
1387 ***********************************************/
1388 mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB;
1389 write_mos_reg(serial, port_number, MOS7720_LCR,
1390 mos7720_port->shadowLCR);
1391 write_mos_reg(serial, port_number, MOS7720_DLL, 0x01);
1392 write_mos_reg(serial, port_number, MOS7720_DLM, 0x00);
1393 mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
1394 write_mos_reg(serial, port_number, MOS7720_LCR,
1395 mos7720_port->shadowLCR);
1396
1397 return 0;
1398 }
1399
1400 /* baud rate information */
1401 struct divisor_table_entry {
1402 __u32 baudrate;
1403 __u16 divisor;
1404 };
1405
1406 /* Define table of divisors for moschip 7720 hardware *
1407 * These assume a 3.6864MHz crystal, the standard /16, and *
1408 * MCR.7 = 0. */
1409 static const struct divisor_table_entry divisor_table[] = {
1410 { 50, 2304},
1411 { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
1412 { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
1413 { 150, 768},
1414 { 300, 384},
1415 { 600, 192},
1416 { 1200, 96},
1417 { 1800, 64},
1418 { 2400, 48},
1419 { 4800, 24},
1420 { 7200, 16},
1421 { 9600, 12},
1422 { 19200, 6},
1423 { 38400, 3},
1424 { 57600, 2},
1425 { 115200, 1},
1426 };
1427
1428 /*****************************************************************************
1429 * calc_baud_rate_divisor
1430 * this function calculates the proper baud rate divisor for the specified
1431 * baud rate.
1432 *****************************************************************************/
1433 static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor)
1434 {
1435 int i;
1436 __u16 custom;
1437 __u16 round1;
1438 __u16 round;
1439
1440
1441 dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate);
1442
1443 for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
1444 if (divisor_table[i].baudrate == baudrate) {
1445 *divisor = divisor_table[i].divisor;
1446 return 0;
1447 }
1448 }
1449
1450 /* After trying for all the standard baud rates *
1451 * Try calculating the divisor for this baud rate */
1452 if (baudrate > 75 && baudrate < 230400) {
1453 /* get the divisor */
1454 custom = (__u16)(230400L / baudrate);
1455
1456 /* Check for round off */
1457 round1 = (__u16)(2304000L / baudrate);
1458 round = (__u16)(round1 - (custom * 10));
1459 if (round > 4)
1460 custom++;
1461 *divisor = custom;
1462
1463 dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom);
1464 return 0;
1465 }
1466
1467 dev_dbg(&port->dev, "Baud calculation Failed...\n");
1468 return -EINVAL;
1469 }
1470
1471 /*
1472 * send_cmd_write_baud_rate
1473 * this function sends the proper command to change the baud rate of the
1474 * specified port.
1475 */
1476 static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
1477 int baudrate)
1478 {
1479 struct usb_serial_port *port;
1480 struct usb_serial *serial;
1481 int divisor;
1482 int status;
1483 unsigned char number;
1484
1485 if (mos7720_port == NULL)
1486 return -1;
1487
1488 port = mos7720_port->port;
1489 serial = port->serial;
1490
1491 number = port->port_number;
1492 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate);
1493
1494 /* Calculate the Divisor */
1495 status = calc_baud_rate_divisor(port, baudrate, &divisor);
1496 if (status) {
1497 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1498 return status;
1499 }
1500
1501 /* Enable access to divisor latch */
1502 mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB;
1503 write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR);
1504
1505 /* Write the divisor */
1506 write_mos_reg(serial, number, MOS7720_DLL, (__u8)(divisor & 0xff));
1507 write_mos_reg(serial, number, MOS7720_DLM,
1508 (__u8)((divisor & 0xff00) >> 8));
1509
1510 /* Disable access to divisor latch */
1511 mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
1512 write_mos_reg(serial, number, MOS7720_LCR, mos7720_port->shadowLCR);
1513
1514 return status;
1515 }
1516
1517 /*
1518 * change_port_settings
1519 * This routine is called to set the UART on the device to match
1520 * the specified new settings.
1521 */
1522 static void change_port_settings(struct tty_struct *tty,
1523 struct moschip_port *mos7720_port,
1524 struct ktermios *old_termios)
1525 {
1526 struct usb_serial_port *port;
1527 struct usb_serial *serial;
1528 int baud;
1529 unsigned cflag;
1530 __u8 lData;
1531 __u8 lParity;
1532 __u8 lStop;
1533 int status;
1534 int port_number;
1535
1536 if (mos7720_port == NULL)
1537 return ;
1538
1539 port = mos7720_port->port;
1540 serial = port->serial;
1541 port_number = port->port_number;
1542
1543 if (!mos7720_port->open) {
1544 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1545 return;
1546 }
1547
1548 lData = UART_LCR_WLEN8;
1549 lStop = 0x00; /* 1 stop bit */
1550 lParity = 0x00; /* No parity */
1551
1552 cflag = tty->termios.c_cflag;
1553
1554 /* Change the number of bits */
1555 switch (cflag & CSIZE) {
1556 case CS5:
1557 lData = UART_LCR_WLEN5;
1558 break;
1559
1560 case CS6:
1561 lData = UART_LCR_WLEN6;
1562 break;
1563
1564 case CS7:
1565 lData = UART_LCR_WLEN7;
1566 break;
1567 default:
1568 case CS8:
1569 lData = UART_LCR_WLEN8;
1570 break;
1571 }
1572
1573 /* Change the Parity bit */
1574 if (cflag & PARENB) {
1575 if (cflag & PARODD) {
1576 lParity = UART_LCR_PARITY;
1577 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1578 } else {
1579 lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
1580 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1581 }
1582
1583 } else {
1584 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1585 }
1586
1587 if (cflag & CMSPAR)
1588 lParity = lParity | 0x20;
1589
1590 /* Change the Stop bit */
1591 if (cflag & CSTOPB) {
1592 lStop = UART_LCR_STOP;
1593 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1594 } else {
1595 lStop = 0x00;
1596 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1597 }
1598
1599 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
1600 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
1601 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
1602
1603 /* Update the LCR with the correct value */
1604 mos7720_port->shadowLCR &=
1605 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1606 mos7720_port->shadowLCR |= (lData | lParity | lStop);
1607
1608
1609 /* Disable Interrupts */
1610 write_mos_reg(serial, port_number, MOS7720_IER, 0x00);
1611 write_mos_reg(serial, port_number, MOS7720_FCR, 0x00);
1612 write_mos_reg(serial, port_number, MOS7720_FCR, 0xcf);
1613
1614 /* Send the updated LCR value to the mos7720 */
1615 write_mos_reg(serial, port_number, MOS7720_LCR,
1616 mos7720_port->shadowLCR);
1617 mos7720_port->shadowMCR = 0x0b;
1618 write_mos_reg(serial, port_number, MOS7720_MCR,
1619 mos7720_port->shadowMCR);
1620
1621 /* set up the MCR register and send it to the mos7720 */
1622 mos7720_port->shadowMCR = UART_MCR_OUT2;
1623 if (cflag & CBAUD)
1624 mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
1625
1626 if (cflag & CRTSCTS) {
1627 mos7720_port->shadowMCR |= (UART_MCR_XONANY);
1628 /* To set hardware flow control to the specified *
1629 * serial port, in SP1/2_CONTROL_REG */
1630 if (port_number)
1631 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG,
1632 0x01);
1633 else
1634 write_mos_reg(serial, dummy, MOS7720_SP_CONTROL_REG,
1635 0x02);
1636
1637 } else
1638 mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
1639
1640 write_mos_reg(serial, port_number, MOS7720_MCR,
1641 mos7720_port->shadowMCR);
1642
1643 /* Determine divisor based on baud rate */
1644 baud = tty_get_baud_rate(tty);
1645 if (!baud) {
1646 /* pick a default, any default... */
1647 dev_dbg(&port->dev, "Picked default baud...\n");
1648 baud = 9600;
1649 }
1650
1651 if (baud >= 230400) {
1652 set_higher_rates(mos7720_port, baud);
1653 /* Enable Interrupts */
1654 write_mos_reg(serial, port_number, MOS7720_IER, 0x0c);
1655 return;
1656 }
1657
1658 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1659 status = send_cmd_write_baud_rate(mos7720_port, baud);
1660 /* FIXME: needs to write actual resulting baud back not just
1661 blindly do so */
1662 if (cflag & CBAUD)
1663 tty_encode_baud_rate(tty, baud, baud);
1664 /* Enable Interrupts */
1665 write_mos_reg(serial, port_number, MOS7720_IER, 0x0c);
1666
1667 if (port->read_urb->status != -EINPROGRESS) {
1668 status = usb_submit_urb(port->read_urb, GFP_KERNEL);
1669 if (status)
1670 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status);
1671 }
1672 }
1673
1674 /*
1675 * mos7720_set_termios
1676 * this function is called by the tty driver when it wants to change the
1677 * termios structure.
1678 */
1679 static void mos7720_set_termios(struct tty_struct *tty,
1680 struct usb_serial_port *port, struct ktermios *old_termios)
1681 {
1682 int status;
1683 struct moschip_port *mos7720_port;
1684
1685 mos7720_port = usb_get_serial_port_data(port);
1686
1687 if (mos7720_port == NULL)
1688 return;
1689
1690 if (!mos7720_port->open) {
1691 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1692 return;
1693 }
1694
1695 /* change the port settings to the new ones specified */
1696 change_port_settings(tty, mos7720_port, old_termios);
1697
1698 if (port->read_urb->status != -EINPROGRESS) {
1699 status = usb_submit_urb(port->read_urb, GFP_KERNEL);
1700 if (status)
1701 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status);
1702 }
1703 }
1704
1705 /*
1706 * get_lsr_info - get line status register info
1707 *
1708 * Purpose: Let user call ioctl() to get info when the UART physically
1709 * is emptied. On bus types like RS485, the transmitter must
1710 * release the bus after transmitting. This must be done when
1711 * the transmit shift register is empty, not be done when the
1712 * transmit holding register is empty. This functionality
1713 * allows an RS485 driver to be written in user space.
1714 */
1715 static int get_lsr_info(struct tty_struct *tty,
1716 struct moschip_port *mos7720_port, unsigned int __user *value)
1717 {
1718 struct usb_serial_port *port = tty->driver_data;
1719 unsigned int result = 0;
1720 unsigned char data = 0;
1721 int port_number = port->port_number;
1722 int count;
1723
1724 count = mos7720_chars_in_buffer(tty);
1725 if (count == 0) {
1726 read_mos_reg(port->serial, port_number, MOS7720_LSR, &data);
1727 if ((data & (UART_LSR_TEMT | UART_LSR_THRE))
1728 == (UART_LSR_TEMT | UART_LSR_THRE)) {
1729 dev_dbg(&port->dev, "%s -- Empty\n", __func__);
1730 result = TIOCSER_TEMT;
1731 }
1732 }
1733 if (copy_to_user(value, &result, sizeof(int)))
1734 return -EFAULT;
1735 return 0;
1736 }
1737
1738 static int mos7720_tiocmget(struct tty_struct *tty)
1739 {
1740 struct usb_serial_port *port = tty->driver_data;
1741 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
1742 unsigned int result = 0;
1743 unsigned int mcr ;
1744 unsigned int msr ;
1745
1746 mcr = mos7720_port->shadowMCR;
1747 msr = mos7720_port->shadowMSR;
1748
1749 result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
1750 | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
1751 | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
1752 | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */
1753 | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
1754 | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
1755
1756 return result;
1757 }
1758
1759 static int mos7720_tiocmset(struct tty_struct *tty,
1760 unsigned int set, unsigned int clear)
1761 {
1762 struct usb_serial_port *port = tty->driver_data;
1763 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
1764 unsigned int mcr ;
1765
1766 mcr = mos7720_port->shadowMCR;
1767
1768 if (set & TIOCM_RTS)
1769 mcr |= UART_MCR_RTS;
1770 if (set & TIOCM_DTR)
1771 mcr |= UART_MCR_DTR;
1772 if (set & TIOCM_LOOP)
1773 mcr |= UART_MCR_LOOP;
1774
1775 if (clear & TIOCM_RTS)
1776 mcr &= ~UART_MCR_RTS;
1777 if (clear & TIOCM_DTR)
1778 mcr &= ~UART_MCR_DTR;
1779 if (clear & TIOCM_LOOP)
1780 mcr &= ~UART_MCR_LOOP;
1781
1782 mos7720_port->shadowMCR = mcr;
1783 write_mos_reg(port->serial, port->port_number, MOS7720_MCR,
1784 mos7720_port->shadowMCR);
1785
1786 return 0;
1787 }
1788
1789 static int get_serial_info(struct tty_struct *tty,
1790 struct serial_struct *ss)
1791 {
1792 struct usb_serial_port *port = tty->driver_data;
1793 struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
1794
1795 ss->type = PORT_16550A;
1796 ss->line = mos7720_port->port->minor;
1797 ss->port = mos7720_port->port->port_number;
1798 ss->irq = 0;
1799 ss->xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1800 ss->baud_base = 9600;
1801 ss->close_delay = 5*HZ;
1802 ss->closing_wait = 30*HZ;
1803 return 0;
1804 }
1805
1806 static int mos7720_ioctl(struct tty_struct *tty,
1807 unsigned int cmd, unsigned long arg)
1808 {
1809 struct usb_serial_port *port = tty->driver_data;
1810 struct moschip_port *mos7720_port;
1811
1812 mos7720_port = usb_get_serial_port_data(port);
1813 if (mos7720_port == NULL)
1814 return -ENODEV;
1815
1816 switch (cmd) {
1817 case TIOCSERGETLSR:
1818 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1819 return get_lsr_info(tty, mos7720_port,
1820 (unsigned int __user *)arg);
1821 }
1822
1823 return -ENOIOCTLCMD;
1824 }
1825
1826 static int mos7720_startup(struct usb_serial *serial)
1827 {
1828 struct usb_device *dev;
1829 char data;
1830 u16 product;
1831 int ret_val;
1832
1833 product = le16_to_cpu(serial->dev->descriptor.idProduct);
1834 dev = serial->dev;
1835
1836 /* setting configuration feature to one */
1837 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1838 (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000);
1839
1840 if (product == MOSCHIP_DEVICE_ID_7715) {
1841 struct urb *urb = serial->port[0]->interrupt_in_urb;
1842
1843 urb->complete = mos7715_interrupt_callback;
1844
1845 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
1846 ret_val = mos7715_parport_init(serial);
1847 if (ret_val < 0)
1848 return ret_val;
1849 #endif
1850 }
1851 /* start the interrupt urb */
1852 ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL);
1853 if (ret_val) {
1854 dev_err(&dev->dev, "failed to submit interrupt urb: %d\n",
1855 ret_val);
1856 }
1857
1858 /* LSR For Port 1 */
1859 read_mos_reg(serial, 0, MOS7720_LSR, &data);
1860 dev_dbg(&dev->dev, "LSR:%x\n", data);
1861
1862 return 0;
1863 }
1864
1865 static void mos7720_release(struct usb_serial *serial)
1866 {
1867 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1868
1869 #ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
1870 /* close the parallel port */
1871
1872 if (le16_to_cpu(serial->dev->descriptor.idProduct)
1873 == MOSCHIP_DEVICE_ID_7715) {
1874 struct urbtracker *urbtrack;
1875 unsigned long flags;
1876 struct mos7715_parport *mos_parport =
1877 usb_get_serial_data(serial);
1878
1879 /* prevent NULL ptr dereference in port callbacks */
1880 spin_lock(&release_lock);
1881 mos_parport->pp->private_data = NULL;
1882 spin_unlock(&release_lock);
1883
1884 /* wait for synchronous usb calls to return */
1885 if (mos_parport->msg_pending)
1886 wait_for_completion_timeout(&mos_parport->syncmsg_compl,
1887 msecs_to_jiffies(MOS_WDR_TIMEOUT));
1888
1889 parport_remove_port(mos_parport->pp);
1890 usb_set_serial_data(serial, NULL);
1891 mos_parport->serial = NULL;
1892
1893 /* if tasklet currently scheduled, wait for it to complete */
1894 tasklet_kill(&mos_parport->urb_tasklet);
1895
1896 /* unlink any urbs sent by the tasklet */
1897 spin_lock_irqsave(&mos_parport->listlock, flags);
1898 list_for_each_entry(urbtrack,
1899 &mos_parport->active_urbs,
1900 urblist_entry)
1901 usb_unlink_urb(urbtrack->urb);
1902 spin_unlock_irqrestore(&mos_parport->listlock, flags);
1903 parport_del_port(mos_parport->pp);
1904
1905 kref_put(&mos_parport->ref_count, destroy_mos_parport);
1906 }
1907 #endif
1908 }
1909
1910 static int mos7720_port_probe(struct usb_serial_port *port)
1911 {
1912 struct moschip_port *mos7720_port;
1913
1914 mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL);
1915 if (!mos7720_port)
1916 return -ENOMEM;
1917
1918 mos7720_port->port = port;
1919
1920 usb_set_serial_port_data(port, mos7720_port);
1921
1922 return 0;
1923 }
1924
1925 static int mos7720_port_remove(struct usb_serial_port *port)
1926 {
1927 struct moschip_port *mos7720_port;
1928
1929 mos7720_port = usb_get_serial_port_data(port);
1930 kfree(mos7720_port);
1931
1932 return 0;
1933 }
1934
1935 static struct usb_serial_driver moschip7720_2port_driver = {
1936 .driver = {
1937 .owner = THIS_MODULE,
1938 .name = "moschip7720",
1939 },
1940 .description = "Moschip 2 port adapter",
1941 .id_table = id_table,
1942 .num_bulk_in = 2,
1943 .num_bulk_out = 2,
1944 .num_interrupt_in = 1,
1945 .calc_num_ports = mos77xx_calc_num_ports,
1946 .open = mos7720_open,
1947 .close = mos7720_close,
1948 .throttle = mos7720_throttle,
1949 .unthrottle = mos7720_unthrottle,
1950 .attach = mos7720_startup,
1951 .release = mos7720_release,
1952 .port_probe = mos7720_port_probe,
1953 .port_remove = mos7720_port_remove,
1954 .ioctl = mos7720_ioctl,
1955 .tiocmget = mos7720_tiocmget,
1956 .tiocmset = mos7720_tiocmset,
1957 .get_serial = get_serial_info,
1958 .set_termios = mos7720_set_termios,
1959 .write = mos7720_write,
1960 .write_room = mos7720_write_room,
1961 .chars_in_buffer = mos7720_chars_in_buffer,
1962 .break_ctl = mos7720_break,
1963 .read_bulk_callback = mos7720_bulk_in_callback,
1964 .read_int_callback = mos7720_interrupt_callback,
1965 };
1966
1967 static struct usb_serial_driver * const serial_drivers[] = {
1968 &moschip7720_2port_driver, NULL
1969 };
1970
1971 module_usb_serial_driver(serial_drivers, id_table);
1972
1973 MODULE_AUTHOR(DRIVER_AUTHOR);
1974 MODULE_DESCRIPTION(DRIVER_DESC);
1975 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support