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1/*
2 * Fintek F81232 USB to serial adaptor driver
3 *
4 * Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org)
5 * Copyright (C) 2012 Linux Foundation
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 */
12
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/slab.h>
16#include <linux/tty.h>
17#include <linux/tty_driver.h>
18#include <linux/tty_flip.h>
19#include <linux/serial.h>
20#include <linux/module.h>
21#include <linux/moduleparam.h>
22#include <linux/mutex.h>
23#include <linux/uaccess.h>
24#include <linux/usb.h>
25#include <linux/usb/serial.h>
26#include <linux/serial_reg.h>
27
28static const struct usb_device_id id_table[] = {
29 { USB_DEVICE(0x1934, 0x0706) },
30 { } /* Terminating entry */
31};
32MODULE_DEVICE_TABLE(usb, id_table);
33
34/* Maximum baudrate for F81232 */
35#define F81232_MAX_BAUDRATE 115200
36
37/* USB Control EP parameter */
38#define F81232_REGISTER_REQUEST 0xa0
39#define F81232_GET_REGISTER 0xc0
40#define F81232_SET_REGISTER 0x40
41
42#define SERIAL_BASE_ADDRESS 0x0120
43#define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS)
44#define INTERRUPT_ENABLE_REGISTER (0x01 + SERIAL_BASE_ADDRESS)
45#define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS)
46#define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS)
47#define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS)
48#define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS)
49
50struct f81232_private {
51 struct mutex lock;
52 u8 modem_control;
53 u8 modem_status;
54 struct work_struct interrupt_work;
55 struct usb_serial_port *port;
56};
57
58static int calc_baud_divisor(speed_t baudrate)
59{
60 return DIV_ROUND_CLOSEST(F81232_MAX_BAUDRATE, baudrate);
61}
62
63static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val)
64{
65 int status;
66 u8 *tmp;
67 struct usb_device *dev = port->serial->dev;
68
69 tmp = kmalloc(sizeof(*val), GFP_KERNEL);
70 if (!tmp)
71 return -ENOMEM;
72
73 status = usb_control_msg(dev,
74 usb_rcvctrlpipe(dev, 0),
75 F81232_REGISTER_REQUEST,
76 F81232_GET_REGISTER,
77 reg,
78 0,
79 tmp,
80 sizeof(*val),
81 USB_CTRL_GET_TIMEOUT);
82 if (status != sizeof(*val)) {
83 dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
84
85 if (status < 0)
86 status = usb_translate_errors(status);
87 else
88 status = -EIO;
89 } else {
90 status = 0;
91 *val = *tmp;
92 }
93
94 kfree(tmp);
95 return status;
96}
97
98static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
99{
100 int status;
101 u8 *tmp;
102 struct usb_device *dev = port->serial->dev;
103
104 tmp = kmalloc(sizeof(val), GFP_KERNEL);
105 if (!tmp)
106 return -ENOMEM;
107
108 *tmp = val;
109
110 status = usb_control_msg(dev,
111 usb_sndctrlpipe(dev, 0),
112 F81232_REGISTER_REQUEST,
113 F81232_SET_REGISTER,
114 reg,
115 0,
116 tmp,
117 sizeof(val),
118 USB_CTRL_SET_TIMEOUT);
119 if (status != sizeof(val)) {
120 dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
121
122 if (status < 0)
123 status = usb_translate_errors(status);
124 else
125 status = -EIO;
126 } else {
127 status = 0;
128 }
129
130 kfree(tmp);
131 return status;
132}
133
134static void f81232_read_msr(struct usb_serial_port *port)
135{
136 int status;
137 u8 current_msr;
138 struct tty_struct *tty;
139 struct f81232_private *priv = usb_get_serial_port_data(port);
140
141 mutex_lock(&priv->lock);
142 status = f81232_get_register(port, MODEM_STATUS_REGISTER,
143 ¤t_msr);
144 if (status) {
145 dev_err(&port->dev, "%s fail, status: %d\n", __func__, status);
146 mutex_unlock(&priv->lock);
147 return;
148 }
149
150 if (!(current_msr & UART_MSR_ANY_DELTA)) {
151 mutex_unlock(&priv->lock);
152 return;
153 }
154
155 priv->modem_status = current_msr;
156
157 if (current_msr & UART_MSR_DCTS)
158 port->icount.cts++;
159 if (current_msr & UART_MSR_DDSR)
160 port->icount.dsr++;
161 if (current_msr & UART_MSR_TERI)
162 port->icount.rng++;
163 if (current_msr & UART_MSR_DDCD) {
164 port->icount.dcd++;
165 tty = tty_port_tty_get(&port->port);
166 if (tty) {
167 usb_serial_handle_dcd_change(port, tty,
168 current_msr & UART_MSR_DCD);
169
170 tty_kref_put(tty);
171 }
172 }
173
174 wake_up_interruptible(&port->port.delta_msr_wait);
175 mutex_unlock(&priv->lock);
176}
177
178static int f81232_set_mctrl(struct usb_serial_port *port,
179 unsigned int set, unsigned int clear)
180{
181 u8 val;
182 int status;
183 struct f81232_private *priv = usb_get_serial_port_data(port);
184
185 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0)
186 return 0; /* no change */
187
188 /* 'set' takes precedence over 'clear' */
189 clear &= ~set;
190
191 /* force enable interrupt with OUT2 */
192 mutex_lock(&priv->lock);
193 val = UART_MCR_OUT2 | priv->modem_control;
194
195 if (clear & TIOCM_DTR)
196 val &= ~UART_MCR_DTR;
197
198 if (clear & TIOCM_RTS)
199 val &= ~UART_MCR_RTS;
200
201 if (set & TIOCM_DTR)
202 val |= UART_MCR_DTR;
203
204 if (set & TIOCM_RTS)
205 val |= UART_MCR_RTS;
206
207 dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__,
208 val, priv->modem_control);
209
210 status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val);
211 if (status) {
212 dev_err(&port->dev, "%s set MCR status < 0\n", __func__);
213 mutex_unlock(&priv->lock);
214 return status;
215 }
216
217 priv->modem_control = val;
218 mutex_unlock(&priv->lock);
219
220 return 0;
221}
222
223static void f81232_update_line_status(struct usb_serial_port *port,
224 unsigned char *data,
225 size_t actual_length)
226{
227 struct f81232_private *priv = usb_get_serial_port_data(port);
228
229 if (!actual_length)
230 return;
231
232 switch (data[0] & 0x07) {
233 case 0x00: /* msr change */
234 dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]);
235 schedule_work(&priv->interrupt_work);
236 break;
237 case 0x02: /* tx-empty */
238 break;
239 case 0x04: /* rx data available */
240 break;
241 case 0x06: /* lsr change */
242 /* we can forget it. the LSR will read from bulk-in */
243 dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]);
244 break;
245 }
246}
247
248static void f81232_read_int_callback(struct urb *urb)
249{
250 struct usb_serial_port *port = urb->context;
251 unsigned char *data = urb->transfer_buffer;
252 unsigned int actual_length = urb->actual_length;
253 int status = urb->status;
254 int retval;
255
256 switch (status) {
257 case 0:
258 /* success */
259 break;
260 case -ECONNRESET:
261 case -ENOENT:
262 case -ESHUTDOWN:
263 /* this urb is terminated, clean up */
264 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
265 __func__, status);
266 return;
267 default:
268 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
269 __func__, status);
270 goto exit;
271 }
272
273 usb_serial_debug_data(&port->dev, __func__,
274 urb->actual_length, urb->transfer_buffer);
275
276 f81232_update_line_status(port, data, actual_length);
277
278exit:
279 retval = usb_submit_urb(urb, GFP_ATOMIC);
280 if (retval)
281 dev_err(&urb->dev->dev,
282 "%s - usb_submit_urb failed with result %d\n",
283 __func__, retval);
284}
285
286static void f81232_process_read_urb(struct urb *urb)
287{
288 struct usb_serial_port *port = urb->context;
289 unsigned char *data = urb->transfer_buffer;
290 char tty_flag;
291 unsigned int i;
292 u8 lsr;
293
294 /*
295 * When opening the port we get a 1-byte packet with the current LSR,
296 * which we discard.
297 */
298 if ((urb->actual_length < 2) || (urb->actual_length % 2))
299 return;
300
301 /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */
302
303 for (i = 0; i < urb->actual_length; i += 2) {
304 tty_flag = TTY_NORMAL;
305 lsr = data[i];
306
307 if (lsr & UART_LSR_BRK_ERROR_BITS) {
308 if (lsr & UART_LSR_BI) {
309 tty_flag = TTY_BREAK;
310 port->icount.brk++;
311 usb_serial_handle_break(port);
312 } else if (lsr & UART_LSR_PE) {
313 tty_flag = TTY_PARITY;
314 port->icount.parity++;
315 } else if (lsr & UART_LSR_FE) {
316 tty_flag = TTY_FRAME;
317 port->icount.frame++;
318 }
319
320 if (lsr & UART_LSR_OE) {
321 port->icount.overrun++;
322 tty_insert_flip_char(&port->port, 0,
323 TTY_OVERRUN);
324 }
325 }
326
327 if (port->port.console && port->sysrq) {
328 if (usb_serial_handle_sysrq_char(port, data[i + 1]))
329 continue;
330 }
331
332 tty_insert_flip_char(&port->port, data[i + 1], tty_flag);
333 }
334
335 tty_flip_buffer_push(&port->port);
336}
337
338static void f81232_break_ctl(struct tty_struct *tty, int break_state)
339{
340 /* FIXME - Stubbed out for now */
341
342 /*
343 * break_state = -1 to turn on break, and 0 to turn off break
344 * see drivers/char/tty_io.c to see it used.
345 * last_set_data_urb_value NEVER has the break bit set in it.
346 */
347}
348
349static void f81232_set_baudrate(struct usb_serial_port *port, speed_t baudrate)
350{
351 u8 lcr;
352 int divisor;
353 int status = 0;
354
355 divisor = calc_baud_divisor(baudrate);
356
357 status = f81232_get_register(port, LINE_CONTROL_REGISTER,
358 &lcr); /* get LCR */
359 if (status) {
360 dev_err(&port->dev, "%s failed to get LCR: %d\n",
361 __func__, status);
362 return;
363 }
364
365 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
366 lcr | UART_LCR_DLAB); /* Enable DLAB */
367 if (status) {
368 dev_err(&port->dev, "%s failed to set DLAB: %d\n",
369 __func__, status);
370 return;
371 }
372
373 status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER,
374 divisor & 0x00ff); /* low */
375 if (status) {
376 dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n",
377 __func__, status);
378 goto reapply_lcr;
379 }
380
381 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
382 (divisor & 0xff00) >> 8); /* high */
383 if (status) {
384 dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n",
385 __func__, status);
386 }
387
388reapply_lcr:
389 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
390 lcr & ~UART_LCR_DLAB);
391 if (status) {
392 dev_err(&port->dev, "%s failed to set DLAB: %d\n",
393 __func__, status);
394 }
395}
396
397static int f81232_port_enable(struct usb_serial_port *port)
398{
399 u8 val;
400 int status;
401
402 /* fifo on, trigger8, clear TX/RX*/
403 val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
404 UART_FCR_CLEAR_XMIT;
405
406 status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val);
407 if (status) {
408 dev_err(&port->dev, "%s failed to set FCR: %d\n",
409 __func__, status);
410 return status;
411 }
412
413 /* MSR Interrupt only, LSR will read from Bulk-in odd byte */
414 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
415 UART_IER_MSI);
416 if (status) {
417 dev_err(&port->dev, "%s failed to set IER: %d\n",
418 __func__, status);
419 return status;
420 }
421
422 return 0;
423}
424
425static int f81232_port_disable(struct usb_serial_port *port)
426{
427 int status;
428
429 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0);
430 if (status) {
431 dev_err(&port->dev, "%s failed to set IER: %d\n",
432 __func__, status);
433 return status;
434 }
435
436 return 0;
437}
438
439static void f81232_set_termios(struct tty_struct *tty,
440 struct usb_serial_port *port, struct ktermios *old_termios)
441{
442 u8 new_lcr = 0;
443 int status = 0;
444 speed_t baudrate;
445
446 /* Don't change anything if nothing has changed */
447 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
448 return;
449
450 if (C_BAUD(tty) == B0)
451 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
452 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
453 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
454
455 baudrate = tty_get_baud_rate(tty);
456 if (baudrate > 0) {
457 if (baudrate > F81232_MAX_BAUDRATE) {
458 baudrate = F81232_MAX_BAUDRATE;
459 tty_encode_baud_rate(tty, baudrate, baudrate);
460 }
461 f81232_set_baudrate(port, baudrate);
462 }
463
464 if (C_PARENB(tty)) {
465 new_lcr |= UART_LCR_PARITY;
466
467 if (!C_PARODD(tty))
468 new_lcr |= UART_LCR_EPAR;
469
470 if (C_CMSPAR(tty))
471 new_lcr |= UART_LCR_SPAR;
472 }
473
474 if (C_CSTOPB(tty))
475 new_lcr |= UART_LCR_STOP;
476
477 switch (C_CSIZE(tty)) {
478 case CS5:
479 new_lcr |= UART_LCR_WLEN5;
480 break;
481 case CS6:
482 new_lcr |= UART_LCR_WLEN6;
483 break;
484 case CS7:
485 new_lcr |= UART_LCR_WLEN7;
486 break;
487 default:
488 case CS8:
489 new_lcr |= UART_LCR_WLEN8;
490 break;
491 }
492
493 status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr);
494 if (status) {
495 dev_err(&port->dev, "%s failed to set LCR: %d\n",
496 __func__, status);
497 }
498}
499
500static int f81232_tiocmget(struct tty_struct *tty)
501{
502 int r;
503 struct usb_serial_port *port = tty->driver_data;
504 struct f81232_private *port_priv = usb_get_serial_port_data(port);
505 u8 mcr, msr;
506
507 /* force get current MSR changed state */
508 f81232_read_msr(port);
509
510 mutex_lock(&port_priv->lock);
511 mcr = port_priv->modem_control;
512 msr = port_priv->modem_status;
513 mutex_unlock(&port_priv->lock);
514
515 r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) |
516 (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) |
517 (msr & UART_MSR_CTS ? TIOCM_CTS : 0) |
518 (msr & UART_MSR_DCD ? TIOCM_CAR : 0) |
519 (msr & UART_MSR_RI ? TIOCM_RI : 0) |
520 (msr & UART_MSR_DSR ? TIOCM_DSR : 0);
521
522 return r;
523}
524
525static int f81232_tiocmset(struct tty_struct *tty,
526 unsigned int set, unsigned int clear)
527{
528 struct usb_serial_port *port = tty->driver_data;
529
530 return f81232_set_mctrl(port, set, clear);
531}
532
533static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
534{
535 int result;
536
537 result = f81232_port_enable(port);
538 if (result)
539 return result;
540
541 /* Setup termios */
542 if (tty)
543 f81232_set_termios(tty, port, NULL);
544
545 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
546 if (result) {
547 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
548 " error %d\n", __func__, result);
549 return result;
550 }
551
552 result = usb_serial_generic_open(tty, port);
553 if (result) {
554 usb_kill_urb(port->interrupt_in_urb);
555 return result;
556 }
557
558 return 0;
559}
560
561static void f81232_close(struct usb_serial_port *port)
562{
563 f81232_port_disable(port);
564 usb_serial_generic_close(port);
565 usb_kill_urb(port->interrupt_in_urb);
566}
567
568static void f81232_dtr_rts(struct usb_serial_port *port, int on)
569{
570 if (on)
571 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
572 else
573 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
574}
575
576static int f81232_carrier_raised(struct usb_serial_port *port)
577{
578 u8 msr;
579 struct f81232_private *priv = usb_get_serial_port_data(port);
580
581 mutex_lock(&priv->lock);
582 msr = priv->modem_status;
583 mutex_unlock(&priv->lock);
584
585 if (msr & UART_MSR_DCD)
586 return 1;
587 return 0;
588}
589
590static int f81232_get_serial_info(struct usb_serial_port *port,
591 unsigned long arg)
592{
593 struct serial_struct ser;
594
595 memset(&ser, 0, sizeof(ser));
596
597 ser.type = PORT_16550A;
598 ser.line = port->minor;
599 ser.port = port->port_number;
600 ser.baud_base = F81232_MAX_BAUDRATE;
601
602 if (copy_to_user((void __user *)arg, &ser, sizeof(ser)))
603 return -EFAULT;
604
605 return 0;
606}
607
608static int f81232_ioctl(struct tty_struct *tty,
609 unsigned int cmd, unsigned long arg)
610{
611 struct usb_serial_port *port = tty->driver_data;
612
613 switch (cmd) {
614 case TIOCGSERIAL:
615 return f81232_get_serial_info(port, arg);
616 default:
617 break;
618 }
619 return -ENOIOCTLCMD;
620}
621
622static void f81232_interrupt_work(struct work_struct *work)
623{
624 struct f81232_private *priv =
625 container_of(work, struct f81232_private, interrupt_work);
626
627 f81232_read_msr(priv->port);
628}
629
630static int f81232_port_probe(struct usb_serial_port *port)
631{
632 struct f81232_private *priv;
633
634 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
635 if (!priv)
636 return -ENOMEM;
637
638 mutex_init(&priv->lock);
639 INIT_WORK(&priv->interrupt_work, f81232_interrupt_work);
640
641 usb_set_serial_port_data(port, priv);
642
643 port->port.drain_delay = 256;
644 priv->port = port;
645
646 return 0;
647}
648
649static int f81232_port_remove(struct usb_serial_port *port)
650{
651 struct f81232_private *priv;
652
653 priv = usb_get_serial_port_data(port);
654 kfree(priv);
655
656 return 0;
657}
658
659static struct usb_serial_driver f81232_device = {
660 .driver = {
661 .owner = THIS_MODULE,
662 .name = "f81232",
663 },
664 .id_table = id_table,
665 .num_ports = 1,
666 .bulk_in_size = 256,
667 .bulk_out_size = 256,
668 .open = f81232_open,
669 .close = f81232_close,
670 .dtr_rts = f81232_dtr_rts,
671 .carrier_raised = f81232_carrier_raised,
672 .ioctl = f81232_ioctl,
673 .break_ctl = f81232_break_ctl,
674 .set_termios = f81232_set_termios,
675 .tiocmget = f81232_tiocmget,
676 .tiocmset = f81232_tiocmset,
677 .tiocmiwait = usb_serial_generic_tiocmiwait,
678 .process_read_urb = f81232_process_read_urb,
679 .read_int_callback = f81232_read_int_callback,
680 .port_probe = f81232_port_probe,
681 .port_remove = f81232_port_remove,
682};
683
684static struct usb_serial_driver * const serial_drivers[] = {
685 &f81232_device,
686 NULL,
687};
688
689module_usb_serial_driver(serial_drivers, id_table);
690
691MODULE_DESCRIPTION("Fintek F81232 USB to serial adaptor driver");
692MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
693MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>");
694MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Fintek F81232 USB to serial adaptor driver
4 * Fintek F81532A/534A/535/536 USB to 2/4/8/12 serial adaptor driver
5 *
6 * Copyright (C) 2012 Greg Kroah-Hartman (gregkh@linuxfoundation.org)
7 * Copyright (C) 2012 Linux Foundation
8 */
9
10#include <linux/kernel.h>
11#include <linux/errno.h>
12#include <linux/slab.h>
13#include <linux/tty.h>
14#include <linux/tty_driver.h>
15#include <linux/tty_flip.h>
16#include <linux/serial.h>
17#include <linux/module.h>
18#include <linux/moduleparam.h>
19#include <linux/mutex.h>
20#include <linux/uaccess.h>
21#include <linux/usb.h>
22#include <linux/usb/serial.h>
23#include <linux/serial_reg.h>
24
25#define F81232_ID \
26 { USB_DEVICE(0x1934, 0x0706) } /* 1 port UART device */
27
28#define F81534A_SERIES_ID \
29 { USB_DEVICE(0x2c42, 0x1602) }, /* In-Box 2 port UART device */ \
30 { USB_DEVICE(0x2c42, 0x1604) }, /* In-Box 4 port UART device */ \
31 { USB_DEVICE(0x2c42, 0x1605) }, /* In-Box 8 port UART device */ \
32 { USB_DEVICE(0x2c42, 0x1606) }, /* In-Box 12 port UART device */ \
33 { USB_DEVICE(0x2c42, 0x1608) }, /* Non-Flash type */ \
34 { USB_DEVICE(0x2c42, 0x1632) }, /* 2 port UART device */ \
35 { USB_DEVICE(0x2c42, 0x1634) }, /* 4 port UART device */ \
36 { USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \
37 { USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */
38
39#define F81534A_CTRL_ID \
40 { USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */
41
42static const struct usb_device_id f81232_id_table[] = {
43 F81232_ID,
44 { } /* Terminating entry */
45};
46
47static const struct usb_device_id f81534a_id_table[] = {
48 F81534A_SERIES_ID,
49 { } /* Terminating entry */
50};
51
52static const struct usb_device_id f81534a_ctrl_id_table[] = {
53 F81534A_CTRL_ID,
54 { } /* Terminating entry */
55};
56
57static const struct usb_device_id combined_id_table[] = {
58 F81232_ID,
59 F81534A_SERIES_ID,
60 F81534A_CTRL_ID,
61 { } /* Terminating entry */
62};
63MODULE_DEVICE_TABLE(usb, combined_id_table);
64
65/* Maximum baudrate for F81232 */
66#define F81232_MAX_BAUDRATE 1500000
67#define F81232_DEF_BAUDRATE 9600
68
69/* USB Control EP parameter */
70#define F81232_REGISTER_REQUEST 0xa0
71#define F81232_GET_REGISTER 0xc0
72#define F81232_SET_REGISTER 0x40
73#define F81534A_ACCESS_REG_RETRY 2
74
75#define SERIAL_BASE_ADDRESS 0x0120
76#define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS)
77#define INTERRUPT_ENABLE_REGISTER (0x01 + SERIAL_BASE_ADDRESS)
78#define FIFO_CONTROL_REGISTER (0x02 + SERIAL_BASE_ADDRESS)
79#define LINE_CONTROL_REGISTER (0x03 + SERIAL_BASE_ADDRESS)
80#define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS)
81#define LINE_STATUS_REGISTER (0x05 + SERIAL_BASE_ADDRESS)
82#define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS)
83
84/*
85 * F81232 Clock registers (106h)
86 *
87 * Bit1-0: Clock source selector
88 * 00: 1.846MHz.
89 * 01: 18.46MHz.
90 * 10: 24MHz.
91 * 11: 14.77MHz.
92 */
93#define F81232_CLK_REGISTER 0x106
94#define F81232_CLK_1_846_MHZ 0
95#define F81232_CLK_18_46_MHZ BIT(0)
96#define F81232_CLK_24_MHZ BIT(1)
97#define F81232_CLK_14_77_MHZ (BIT(1) | BIT(0))
98#define F81232_CLK_MASK GENMASK(1, 0)
99
100#define F81534A_MODE_REG 0x107
101#define F81534A_TRIGGER_MASK GENMASK(3, 2)
102#define F81534A_TRIGGER_MULTIPLE_4X BIT(3)
103#define F81534A_FIFO_128BYTE (BIT(1) | BIT(0))
104
105/* Serial port self GPIO control, 2bytes [control&output data][input data] */
106#define F81534A_GPIO_REG 0x10e
107#define F81534A_GPIO_MODE2_DIR BIT(6) /* 1: input, 0: output */
108#define F81534A_GPIO_MODE1_DIR BIT(5)
109#define F81534A_GPIO_MODE0_DIR BIT(4)
110#define F81534A_GPIO_MODE2_OUTPUT BIT(2)
111#define F81534A_GPIO_MODE1_OUTPUT BIT(1)
112#define F81534A_GPIO_MODE0_OUTPUT BIT(0)
113
114#define F81534A_CTRL_CMD_ENABLE_PORT 0x116
115
116struct f81232_private {
117 struct mutex lock;
118 u8 modem_control;
119 u8 modem_status;
120 u8 shadow_lcr;
121 speed_t baud_base;
122 struct work_struct lsr_work;
123 struct work_struct interrupt_work;
124 struct usb_serial_port *port;
125};
126
127static u32 const baudrate_table[] = { 115200, 921600, 1152000, 1500000 };
128static u8 const clock_table[] = { F81232_CLK_1_846_MHZ, F81232_CLK_14_77_MHZ,
129 F81232_CLK_18_46_MHZ, F81232_CLK_24_MHZ };
130
131static int calc_baud_divisor(speed_t baudrate, speed_t clockrate)
132{
133 return DIV_ROUND_CLOSEST(clockrate, baudrate);
134}
135
136static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val)
137{
138 int status;
139 struct usb_device *dev = port->serial->dev;
140
141 status = usb_control_msg_recv(dev,
142 0,
143 F81232_REGISTER_REQUEST,
144 F81232_GET_REGISTER,
145 reg,
146 0,
147 val,
148 sizeof(*val),
149 USB_CTRL_GET_TIMEOUT,
150 GFP_KERNEL);
151 if (status) {
152 dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
153 status = usb_translate_errors(status);
154 }
155
156 return status;
157}
158
159static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
160{
161 int status;
162 struct usb_device *dev = port->serial->dev;
163
164 status = usb_control_msg_send(dev,
165 0,
166 F81232_REGISTER_REQUEST,
167 F81232_SET_REGISTER,
168 reg,
169 0,
170 &val,
171 sizeof(val),
172 USB_CTRL_SET_TIMEOUT,
173 GFP_KERNEL);
174 if (status) {
175 dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
176 status = usb_translate_errors(status);
177 }
178
179 return status;
180}
181
182static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg,
183 u8 mask, u8 val)
184{
185 int status;
186 u8 tmp;
187
188 status = f81232_get_register(port, reg, &tmp);
189 if (status)
190 return status;
191
192 tmp = (tmp & ~mask) | (val & mask);
193
194 return f81232_set_register(port, reg, tmp);
195}
196
197static void f81232_read_msr(struct usb_serial_port *port)
198{
199 int status;
200 u8 current_msr;
201 struct tty_struct *tty;
202 struct f81232_private *priv = usb_get_serial_port_data(port);
203
204 mutex_lock(&priv->lock);
205 status = f81232_get_register(port, MODEM_STATUS_REGISTER,
206 ¤t_msr);
207 if (status) {
208 dev_err(&port->dev, "%s fail, status: %d\n", __func__, status);
209 mutex_unlock(&priv->lock);
210 return;
211 }
212
213 if (!(current_msr & UART_MSR_ANY_DELTA)) {
214 mutex_unlock(&priv->lock);
215 return;
216 }
217
218 priv->modem_status = current_msr;
219
220 if (current_msr & UART_MSR_DCTS)
221 port->icount.cts++;
222 if (current_msr & UART_MSR_DDSR)
223 port->icount.dsr++;
224 if (current_msr & UART_MSR_TERI)
225 port->icount.rng++;
226 if (current_msr & UART_MSR_DDCD) {
227 port->icount.dcd++;
228 tty = tty_port_tty_get(&port->port);
229 if (tty) {
230 usb_serial_handle_dcd_change(port, tty,
231 current_msr & UART_MSR_DCD);
232
233 tty_kref_put(tty);
234 }
235 }
236
237 wake_up_interruptible(&port->port.delta_msr_wait);
238 mutex_unlock(&priv->lock);
239}
240
241static int f81232_set_mctrl(struct usb_serial_port *port,
242 unsigned int set, unsigned int clear)
243{
244 u8 val;
245 int status;
246 struct f81232_private *priv = usb_get_serial_port_data(port);
247
248 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0)
249 return 0; /* no change */
250
251 /* 'set' takes precedence over 'clear' */
252 clear &= ~set;
253
254 /* force enable interrupt with OUT2 */
255 mutex_lock(&priv->lock);
256 val = UART_MCR_OUT2 | priv->modem_control;
257
258 if (clear & TIOCM_DTR)
259 val &= ~UART_MCR_DTR;
260
261 if (clear & TIOCM_RTS)
262 val &= ~UART_MCR_RTS;
263
264 if (set & TIOCM_DTR)
265 val |= UART_MCR_DTR;
266
267 if (set & TIOCM_RTS)
268 val |= UART_MCR_RTS;
269
270 dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__,
271 val, priv->modem_control);
272
273 status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val);
274 if (status) {
275 dev_err(&port->dev, "%s set MCR status < 0\n", __func__);
276 mutex_unlock(&priv->lock);
277 return status;
278 }
279
280 priv->modem_control = val;
281 mutex_unlock(&priv->lock);
282
283 return 0;
284}
285
286static void f81232_update_line_status(struct usb_serial_port *port,
287 unsigned char *data,
288 size_t actual_length)
289{
290 struct f81232_private *priv = usb_get_serial_port_data(port);
291
292 if (!actual_length)
293 return;
294
295 switch (data[0] & 0x07) {
296 case 0x00: /* msr change */
297 dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]);
298 schedule_work(&priv->interrupt_work);
299 break;
300 case 0x02: /* tx-empty */
301 break;
302 case 0x04: /* rx data available */
303 break;
304 case 0x06: /* lsr change */
305 /* we can forget it. the LSR will read from bulk-in */
306 dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]);
307 break;
308 }
309}
310
311static void f81232_read_int_callback(struct urb *urb)
312{
313 struct usb_serial_port *port = urb->context;
314 unsigned char *data = urb->transfer_buffer;
315 unsigned int actual_length = urb->actual_length;
316 int status = urb->status;
317 int retval;
318
319 switch (status) {
320 case 0:
321 /* success */
322 break;
323 case -ECONNRESET:
324 case -ENOENT:
325 case -ESHUTDOWN:
326 /* this urb is terminated, clean up */
327 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
328 __func__, status);
329 return;
330 default:
331 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
332 __func__, status);
333 goto exit;
334 }
335
336 usb_serial_debug_data(&port->dev, __func__,
337 urb->actual_length, urb->transfer_buffer);
338
339 f81232_update_line_status(port, data, actual_length);
340
341exit:
342 retval = usb_submit_urb(urb, GFP_ATOMIC);
343 if (retval)
344 dev_err(&urb->dev->dev,
345 "%s - usb_submit_urb failed with result %d\n",
346 __func__, retval);
347}
348
349static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr)
350{
351 struct f81232_private *priv = usb_get_serial_port_data(port);
352 char tty_flag = TTY_NORMAL;
353
354 if (!(lsr & UART_LSR_BRK_ERROR_BITS))
355 return tty_flag;
356
357 if (lsr & UART_LSR_BI) {
358 tty_flag = TTY_BREAK;
359 port->icount.brk++;
360 usb_serial_handle_break(port);
361 } else if (lsr & UART_LSR_PE) {
362 tty_flag = TTY_PARITY;
363 port->icount.parity++;
364 } else if (lsr & UART_LSR_FE) {
365 tty_flag = TTY_FRAME;
366 port->icount.frame++;
367 }
368
369 if (lsr & UART_LSR_OE) {
370 port->icount.overrun++;
371 schedule_work(&priv->lsr_work);
372 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
373 }
374
375 return tty_flag;
376}
377
378static void f81232_process_read_urb(struct urb *urb)
379{
380 struct usb_serial_port *port = urb->context;
381 unsigned char *data = urb->transfer_buffer;
382 char tty_flag;
383 unsigned int i;
384 u8 lsr;
385
386 /*
387 * When opening the port we get a 1-byte packet with the current LSR,
388 * which we discard.
389 */
390 if ((urb->actual_length < 2) || (urb->actual_length % 2))
391 return;
392
393 /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */
394
395 for (i = 0; i < urb->actual_length; i += 2) {
396 lsr = data[i];
397 tty_flag = f81232_handle_lsr(port, lsr);
398
399 if (port->sysrq) {
400 if (usb_serial_handle_sysrq_char(port, data[i + 1]))
401 continue;
402 }
403
404 tty_insert_flip_char(&port->port, data[i + 1], tty_flag);
405 }
406
407 tty_flip_buffer_push(&port->port);
408}
409
410static void f81534a_process_read_urb(struct urb *urb)
411{
412 struct usb_serial_port *port = urb->context;
413 unsigned char *data = urb->transfer_buffer;
414 char tty_flag;
415 unsigned int i;
416 u8 lsr;
417 u8 len;
418
419 if (urb->actual_length < 3) {
420 dev_err(&port->dev, "short message received: %d\n",
421 urb->actual_length);
422 return;
423 }
424
425 len = data[0];
426 if (len != urb->actual_length) {
427 dev_err(&port->dev, "malformed message received: %d (%d)\n",
428 urb->actual_length, len);
429 return;
430 }
431
432 /* bulk-in data: [LEN][Data.....][LSR] */
433 lsr = data[len - 1];
434 tty_flag = f81232_handle_lsr(port, lsr);
435
436 if (port->sysrq) {
437 for (i = 1; i < len - 1; ++i) {
438 if (!usb_serial_handle_sysrq_char(port, data[i])) {
439 tty_insert_flip_char(&port->port, data[i],
440 tty_flag);
441 }
442 }
443 } else {
444 tty_insert_flip_string_fixed_flag(&port->port, &data[1],
445 tty_flag, len - 2);
446 }
447
448 tty_flip_buffer_push(&port->port);
449}
450
451static int f81232_break_ctl(struct tty_struct *tty, int break_state)
452{
453 struct usb_serial_port *port = tty->driver_data;
454 struct f81232_private *priv = usb_get_serial_port_data(port);
455 int status;
456
457 mutex_lock(&priv->lock);
458
459 if (break_state)
460 priv->shadow_lcr |= UART_LCR_SBC;
461 else
462 priv->shadow_lcr &= ~UART_LCR_SBC;
463
464 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
465 priv->shadow_lcr);
466 if (status)
467 dev_err(&port->dev, "set break failed: %d\n", status);
468
469 mutex_unlock(&priv->lock);
470
471 return status;
472}
473
474static int f81232_find_clk(speed_t baudrate)
475{
476 int idx;
477
478 for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) {
479 if (baudrate <= baudrate_table[idx] &&
480 baudrate_table[idx] % baudrate == 0)
481 return idx;
482 }
483
484 return -EINVAL;
485}
486
487static void f81232_set_baudrate(struct tty_struct *tty,
488 struct usb_serial_port *port, speed_t baudrate,
489 speed_t old_baudrate)
490{
491 struct f81232_private *priv = usb_get_serial_port_data(port);
492 u8 lcr;
493 int divisor;
494 int status = 0;
495 int i;
496 int idx;
497 speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE };
498
499 for (i = 0; i < ARRAY_SIZE(baud_list); ++i) {
500 baudrate = baud_list[i];
501 if (baudrate == 0) {
502 tty_encode_baud_rate(tty, 0, 0);
503 return;
504 }
505
506 idx = f81232_find_clk(baudrate);
507 if (idx >= 0) {
508 tty_encode_baud_rate(tty, baudrate, baudrate);
509 break;
510 }
511 }
512
513 if (idx < 0)
514 return;
515
516 priv->baud_base = baudrate_table[idx];
517 divisor = calc_baud_divisor(baudrate, priv->baud_base);
518
519 status = f81232_set_mask_register(port, F81232_CLK_REGISTER,
520 F81232_CLK_MASK, clock_table[idx]);
521 if (status) {
522 dev_err(&port->dev, "%s failed to set CLK_REG: %d\n",
523 __func__, status);
524 return;
525 }
526
527 status = f81232_get_register(port, LINE_CONTROL_REGISTER,
528 &lcr); /* get LCR */
529 if (status) {
530 dev_err(&port->dev, "%s failed to get LCR: %d\n",
531 __func__, status);
532 return;
533 }
534
535 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
536 lcr | UART_LCR_DLAB); /* Enable DLAB */
537 if (status) {
538 dev_err(&port->dev, "%s failed to set DLAB: %d\n",
539 __func__, status);
540 return;
541 }
542
543 status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER,
544 divisor & 0x00ff); /* low */
545 if (status) {
546 dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n",
547 __func__, status);
548 goto reapply_lcr;
549 }
550
551 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
552 (divisor & 0xff00) >> 8); /* high */
553 if (status) {
554 dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n",
555 __func__, status);
556 }
557
558reapply_lcr:
559 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
560 lcr & ~UART_LCR_DLAB);
561 if (status) {
562 dev_err(&port->dev, "%s failed to set DLAB: %d\n",
563 __func__, status);
564 }
565}
566
567static int f81232_port_enable(struct usb_serial_port *port)
568{
569 u8 val;
570 int status;
571
572 /* fifo on, trigger8, clear TX/RX*/
573 val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
574 UART_FCR_CLEAR_XMIT;
575
576 status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val);
577 if (status) {
578 dev_err(&port->dev, "%s failed to set FCR: %d\n",
579 __func__, status);
580 return status;
581 }
582
583 /* MSR Interrupt only, LSR will read from Bulk-in odd byte */
584 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
585 UART_IER_MSI);
586 if (status) {
587 dev_err(&port->dev, "%s failed to set IER: %d\n",
588 __func__, status);
589 return status;
590 }
591
592 return 0;
593}
594
595static int f81232_port_disable(struct usb_serial_port *port)
596{
597 int status;
598
599 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0);
600 if (status) {
601 dev_err(&port->dev, "%s failed to set IER: %d\n",
602 __func__, status);
603 return status;
604 }
605
606 return 0;
607}
608
609static void f81232_set_termios(struct tty_struct *tty,
610 struct usb_serial_port *port,
611 const struct ktermios *old_termios)
612{
613 struct f81232_private *priv = usb_get_serial_port_data(port);
614 u8 new_lcr = 0;
615 int status = 0;
616 speed_t baudrate;
617 speed_t old_baud;
618
619 /* Don't change anything if nothing has changed */
620 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
621 return;
622
623 if (C_BAUD(tty) == B0)
624 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
625 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
626 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
627
628 baudrate = tty_get_baud_rate(tty);
629 if (baudrate > 0) {
630 if (old_termios)
631 old_baud = tty_termios_baud_rate(old_termios);
632 else
633 old_baud = F81232_DEF_BAUDRATE;
634
635 f81232_set_baudrate(tty, port, baudrate, old_baud);
636 }
637
638 if (C_PARENB(tty)) {
639 new_lcr |= UART_LCR_PARITY;
640
641 if (!C_PARODD(tty))
642 new_lcr |= UART_LCR_EPAR;
643
644 if (C_CMSPAR(tty))
645 new_lcr |= UART_LCR_SPAR;
646 }
647
648 if (C_CSTOPB(tty))
649 new_lcr |= UART_LCR_STOP;
650
651 new_lcr |= UART_LCR_WLEN(tty_get_char_size(tty->termios.c_cflag));
652
653 mutex_lock(&priv->lock);
654
655 new_lcr |= (priv->shadow_lcr & UART_LCR_SBC);
656 status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr);
657 if (status) {
658 dev_err(&port->dev, "%s failed to set LCR: %d\n",
659 __func__, status);
660 }
661
662 priv->shadow_lcr = new_lcr;
663
664 mutex_unlock(&priv->lock);
665}
666
667static int f81232_tiocmget(struct tty_struct *tty)
668{
669 int r;
670 struct usb_serial_port *port = tty->driver_data;
671 struct f81232_private *port_priv = usb_get_serial_port_data(port);
672 u8 mcr, msr;
673
674 /* force get current MSR changed state */
675 f81232_read_msr(port);
676
677 mutex_lock(&port_priv->lock);
678 mcr = port_priv->modem_control;
679 msr = port_priv->modem_status;
680 mutex_unlock(&port_priv->lock);
681
682 r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) |
683 (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) |
684 (msr & UART_MSR_CTS ? TIOCM_CTS : 0) |
685 (msr & UART_MSR_DCD ? TIOCM_CAR : 0) |
686 (msr & UART_MSR_RI ? TIOCM_RI : 0) |
687 (msr & UART_MSR_DSR ? TIOCM_DSR : 0);
688
689 return r;
690}
691
692static int f81232_tiocmset(struct tty_struct *tty,
693 unsigned int set, unsigned int clear)
694{
695 struct usb_serial_port *port = tty->driver_data;
696
697 return f81232_set_mctrl(port, set, clear);
698}
699
700static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
701{
702 int result;
703
704 result = f81232_port_enable(port);
705 if (result)
706 return result;
707
708 /* Setup termios */
709 if (tty)
710 f81232_set_termios(tty, port, NULL);
711
712 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
713 if (result) {
714 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
715 " error %d\n", __func__, result);
716 return result;
717 }
718
719 result = usb_serial_generic_open(tty, port);
720 if (result) {
721 usb_kill_urb(port->interrupt_in_urb);
722 return result;
723 }
724
725 return 0;
726}
727
728static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port)
729{
730 int status;
731 u8 mask;
732 u8 val;
733
734 val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE;
735 mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE;
736
737 status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val);
738 if (status) {
739 dev_err(&port->dev, "failed to set MODE_REG: %d\n", status);
740 return status;
741 }
742
743 return f81232_open(tty, port);
744}
745
746static void f81232_close(struct usb_serial_port *port)
747{
748 struct f81232_private *port_priv = usb_get_serial_port_data(port);
749
750 f81232_port_disable(port);
751 usb_serial_generic_close(port);
752 usb_kill_urb(port->interrupt_in_urb);
753 flush_work(&port_priv->interrupt_work);
754 flush_work(&port_priv->lsr_work);
755}
756
757static void f81232_dtr_rts(struct usb_serial_port *port, int on)
758{
759 if (on)
760 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
761 else
762 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
763}
764
765static bool f81232_tx_empty(struct usb_serial_port *port)
766{
767 int status;
768 u8 tmp;
769
770 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
771 if (!status) {
772 if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT)
773 return false;
774 }
775
776 return true;
777}
778
779static int f81232_carrier_raised(struct usb_serial_port *port)
780{
781 u8 msr;
782 struct f81232_private *priv = usb_get_serial_port_data(port);
783
784 mutex_lock(&priv->lock);
785 msr = priv->modem_status;
786 mutex_unlock(&priv->lock);
787
788 if (msr & UART_MSR_DCD)
789 return 1;
790 return 0;
791}
792
793static void f81232_get_serial(struct tty_struct *tty, struct serial_struct *ss)
794{
795 struct usb_serial_port *port = tty->driver_data;
796 struct f81232_private *priv = usb_get_serial_port_data(port);
797
798 ss->baud_base = priv->baud_base;
799}
800
801static void f81232_interrupt_work(struct work_struct *work)
802{
803 struct f81232_private *priv =
804 container_of(work, struct f81232_private, interrupt_work);
805
806 f81232_read_msr(priv->port);
807}
808
809static void f81232_lsr_worker(struct work_struct *work)
810{
811 struct f81232_private *priv;
812 struct usb_serial_port *port;
813 int status;
814 u8 tmp;
815
816 priv = container_of(work, struct f81232_private, lsr_work);
817 port = priv->port;
818
819 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
820 if (status)
821 dev_warn(&port->dev, "read LSR failed: %d\n", status);
822}
823
824static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg,
825 u16 size, void *val)
826{
827 struct usb_device *dev = interface_to_usbdev(intf);
828 int retry = F81534A_ACCESS_REG_RETRY;
829 int status;
830
831 while (retry--) {
832 status = usb_control_msg_send(dev,
833 0,
834 F81232_REGISTER_REQUEST,
835 F81232_SET_REGISTER,
836 reg,
837 0,
838 val,
839 size,
840 USB_CTRL_SET_TIMEOUT,
841 GFP_KERNEL);
842 if (status) {
843 status = usb_translate_errors(status);
844 if (status == -EIO)
845 continue;
846 }
847
848 break;
849 }
850
851 if (status) {
852 dev_err(&intf->dev, "failed to set register 0x%x: %d\n",
853 reg, status);
854 }
855
856 return status;
857}
858
859static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en)
860{
861 unsigned char enable[2] = {0};
862 int status;
863
864 /*
865 * Enable all available serial ports, define as following:
866 * bit 15 : Reset behavior (when HUB got soft reset)
867 * 0: maintain all serial port enabled state.
868 * 1: disable all serial port.
869 * bit 0~11 : Serial port enable bit.
870 */
871 if (en) {
872 enable[0] = 0xff;
873 enable[1] = 0x8f;
874 }
875
876 status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT,
877 sizeof(enable), enable);
878 if (status)
879 dev_err(&intf->dev, "failed to enable ports: %d\n", status);
880
881 return status;
882}
883
884static int f81534a_ctrl_probe(struct usb_interface *intf,
885 const struct usb_device_id *id)
886{
887 return f81534a_ctrl_enable_all_ports(intf, true);
888}
889
890static void f81534a_ctrl_disconnect(struct usb_interface *intf)
891{
892 f81534a_ctrl_enable_all_ports(intf, false);
893}
894
895static int f81534a_ctrl_resume(struct usb_interface *intf)
896{
897 return f81534a_ctrl_enable_all_ports(intf, true);
898}
899
900static int f81232_port_probe(struct usb_serial_port *port)
901{
902 struct f81232_private *priv;
903
904 priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL);
905 if (!priv)
906 return -ENOMEM;
907
908 mutex_init(&priv->lock);
909 INIT_WORK(&priv->interrupt_work, f81232_interrupt_work);
910 INIT_WORK(&priv->lsr_work, f81232_lsr_worker);
911
912 usb_set_serial_port_data(port, priv);
913
914 priv->port = port;
915
916 return 0;
917}
918
919static int f81534a_port_probe(struct usb_serial_port *port)
920{
921 int status;
922
923 /* tri-state with pull-high, default RS232 Mode */
924 status = f81232_set_register(port, F81534A_GPIO_REG,
925 F81534A_GPIO_MODE2_DIR);
926 if (status)
927 return status;
928
929 return f81232_port_probe(port);
930}
931
932static int f81232_suspend(struct usb_serial *serial, pm_message_t message)
933{
934 struct usb_serial_port *port = serial->port[0];
935 struct f81232_private *port_priv = usb_get_serial_port_data(port);
936 int i;
937
938 for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
939 usb_kill_urb(port->read_urbs[i]);
940
941 usb_kill_urb(port->interrupt_in_urb);
942
943 if (port_priv) {
944 flush_work(&port_priv->interrupt_work);
945 flush_work(&port_priv->lsr_work);
946 }
947
948 return 0;
949}
950
951static int f81232_resume(struct usb_serial *serial)
952{
953 struct usb_serial_port *port = serial->port[0];
954 int result;
955
956 if (tty_port_initialized(&port->port)) {
957 result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
958 if (result) {
959 dev_err(&port->dev, "submit interrupt urb failed: %d\n",
960 result);
961 return result;
962 }
963 }
964
965 return usb_serial_generic_resume(serial);
966}
967
968static struct usb_serial_driver f81232_device = {
969 .driver = {
970 .name = "f81232",
971 },
972 .id_table = f81232_id_table,
973 .num_ports = 1,
974 .bulk_in_size = 256,
975 .bulk_out_size = 256,
976 .open = f81232_open,
977 .close = f81232_close,
978 .dtr_rts = f81232_dtr_rts,
979 .carrier_raised = f81232_carrier_raised,
980 .get_serial = f81232_get_serial,
981 .break_ctl = f81232_break_ctl,
982 .set_termios = f81232_set_termios,
983 .tiocmget = f81232_tiocmget,
984 .tiocmset = f81232_tiocmset,
985 .tiocmiwait = usb_serial_generic_tiocmiwait,
986 .tx_empty = f81232_tx_empty,
987 .process_read_urb = f81232_process_read_urb,
988 .read_int_callback = f81232_read_int_callback,
989 .port_probe = f81232_port_probe,
990 .suspend = f81232_suspend,
991 .resume = f81232_resume,
992};
993
994static struct usb_serial_driver f81534a_device = {
995 .driver = {
996 .name = "f81534a",
997 },
998 .id_table = f81534a_id_table,
999 .num_ports = 1,
1000 .open = f81534a_open,
1001 .close = f81232_close,
1002 .dtr_rts = f81232_dtr_rts,
1003 .carrier_raised = f81232_carrier_raised,
1004 .get_serial = f81232_get_serial,
1005 .break_ctl = f81232_break_ctl,
1006 .set_termios = f81232_set_termios,
1007 .tiocmget = f81232_tiocmget,
1008 .tiocmset = f81232_tiocmset,
1009 .tiocmiwait = usb_serial_generic_tiocmiwait,
1010 .tx_empty = f81232_tx_empty,
1011 .process_read_urb = f81534a_process_read_urb,
1012 .read_int_callback = f81232_read_int_callback,
1013 .port_probe = f81534a_port_probe,
1014 .suspend = f81232_suspend,
1015 .resume = f81232_resume,
1016};
1017
1018static struct usb_serial_driver * const serial_drivers[] = {
1019 &f81232_device,
1020 &f81534a_device,
1021 NULL,
1022};
1023
1024static struct usb_driver f81534a_ctrl_driver = {
1025 .name = "f81534a_ctrl",
1026 .id_table = f81534a_ctrl_id_table,
1027 .probe = f81534a_ctrl_probe,
1028 .disconnect = f81534a_ctrl_disconnect,
1029 .resume = f81534a_ctrl_resume,
1030};
1031
1032static int __init f81232_init(void)
1033{
1034 int status;
1035
1036 status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE,
1037 KBUILD_MODNAME);
1038 if (status)
1039 return status;
1040
1041 status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME,
1042 combined_id_table);
1043 if (status) {
1044 usb_deregister(&f81534a_ctrl_driver);
1045 return status;
1046 }
1047
1048 return 0;
1049}
1050
1051static void __exit f81232_exit(void)
1052{
1053 usb_serial_deregister_drivers(serial_drivers);
1054 usb_deregister(&f81534a_ctrl_driver);
1055}
1056
1057module_init(f81232_init);
1058module_exit(f81232_exit);
1059
1060MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver");
1061MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
1062MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>");
1063MODULE_LICENSE("GPL v2");