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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 if (!baudrate)
134 return 0;
135
136 return DIV_ROUND_CLOSEST(clockrate, baudrate);
137}
138
139static int f81232_get_register(struct usb_serial_port *port, u16 reg, u8 *val)
140{
141 int status;
142 u8 *tmp;
143 struct usb_device *dev = port->serial->dev;
144
145 tmp = kmalloc(sizeof(*val), GFP_KERNEL);
146 if (!tmp)
147 return -ENOMEM;
148
149 status = usb_control_msg(dev,
150 usb_rcvctrlpipe(dev, 0),
151 F81232_REGISTER_REQUEST,
152 F81232_GET_REGISTER,
153 reg,
154 0,
155 tmp,
156 sizeof(*val),
157 USB_CTRL_GET_TIMEOUT);
158 if (status != sizeof(*val)) {
159 dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
160
161 if (status < 0)
162 status = usb_translate_errors(status);
163 else
164 status = -EIO;
165 } else {
166 status = 0;
167 *val = *tmp;
168 }
169
170 kfree(tmp);
171 return status;
172}
173
174static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
175{
176 int status;
177 u8 *tmp;
178 struct usb_device *dev = port->serial->dev;
179
180 tmp = kmalloc(sizeof(val), GFP_KERNEL);
181 if (!tmp)
182 return -ENOMEM;
183
184 *tmp = val;
185
186 status = usb_control_msg(dev,
187 usb_sndctrlpipe(dev, 0),
188 F81232_REGISTER_REQUEST,
189 F81232_SET_REGISTER,
190 reg,
191 0,
192 tmp,
193 sizeof(val),
194 USB_CTRL_SET_TIMEOUT);
195 if (status < 0) {
196 dev_err(&port->dev, "%s failed status: %d\n", __func__, status);
197 status = usb_translate_errors(status);
198 } else {
199 status = 0;
200 }
201
202 kfree(tmp);
203 return status;
204}
205
206static int f81232_set_mask_register(struct usb_serial_port *port, u16 reg,
207 u8 mask, u8 val)
208{
209 int status;
210 u8 tmp;
211
212 status = f81232_get_register(port, reg, &tmp);
213 if (status)
214 return status;
215
216 tmp = (tmp & ~mask) | (val & mask);
217
218 return f81232_set_register(port, reg, tmp);
219}
220
221static void f81232_read_msr(struct usb_serial_port *port)
222{
223 int status;
224 u8 current_msr;
225 struct tty_struct *tty;
226 struct f81232_private *priv = usb_get_serial_port_data(port);
227
228 mutex_lock(&priv->lock);
229 status = f81232_get_register(port, MODEM_STATUS_REGISTER,
230 ¤t_msr);
231 if (status) {
232 dev_err(&port->dev, "%s fail, status: %d\n", __func__, status);
233 mutex_unlock(&priv->lock);
234 return;
235 }
236
237 if (!(current_msr & UART_MSR_ANY_DELTA)) {
238 mutex_unlock(&priv->lock);
239 return;
240 }
241
242 priv->modem_status = current_msr;
243
244 if (current_msr & UART_MSR_DCTS)
245 port->icount.cts++;
246 if (current_msr & UART_MSR_DDSR)
247 port->icount.dsr++;
248 if (current_msr & UART_MSR_TERI)
249 port->icount.rng++;
250 if (current_msr & UART_MSR_DDCD) {
251 port->icount.dcd++;
252 tty = tty_port_tty_get(&port->port);
253 if (tty) {
254 usb_serial_handle_dcd_change(port, tty,
255 current_msr & UART_MSR_DCD);
256
257 tty_kref_put(tty);
258 }
259 }
260
261 wake_up_interruptible(&port->port.delta_msr_wait);
262 mutex_unlock(&priv->lock);
263}
264
265static int f81232_set_mctrl(struct usb_serial_port *port,
266 unsigned int set, unsigned int clear)
267{
268 u8 val;
269 int status;
270 struct f81232_private *priv = usb_get_serial_port_data(port);
271
272 if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0)
273 return 0; /* no change */
274
275 /* 'set' takes precedence over 'clear' */
276 clear &= ~set;
277
278 /* force enable interrupt with OUT2 */
279 mutex_lock(&priv->lock);
280 val = UART_MCR_OUT2 | priv->modem_control;
281
282 if (clear & TIOCM_DTR)
283 val &= ~UART_MCR_DTR;
284
285 if (clear & TIOCM_RTS)
286 val &= ~UART_MCR_RTS;
287
288 if (set & TIOCM_DTR)
289 val |= UART_MCR_DTR;
290
291 if (set & TIOCM_RTS)
292 val |= UART_MCR_RTS;
293
294 dev_dbg(&port->dev, "%s new:%02x old:%02x\n", __func__,
295 val, priv->modem_control);
296
297 status = f81232_set_register(port, MODEM_CONTROL_REGISTER, val);
298 if (status) {
299 dev_err(&port->dev, "%s set MCR status < 0\n", __func__);
300 mutex_unlock(&priv->lock);
301 return status;
302 }
303
304 priv->modem_control = val;
305 mutex_unlock(&priv->lock);
306
307 return 0;
308}
309
310static void f81232_update_line_status(struct usb_serial_port *port,
311 unsigned char *data,
312 size_t actual_length)
313{
314 struct f81232_private *priv = usb_get_serial_port_data(port);
315
316 if (!actual_length)
317 return;
318
319 switch (data[0] & 0x07) {
320 case 0x00: /* msr change */
321 dev_dbg(&port->dev, "IIR: MSR Change: %02x\n", data[0]);
322 schedule_work(&priv->interrupt_work);
323 break;
324 case 0x02: /* tx-empty */
325 break;
326 case 0x04: /* rx data available */
327 break;
328 case 0x06: /* lsr change */
329 /* we can forget it. the LSR will read from bulk-in */
330 dev_dbg(&port->dev, "IIR: LSR Change: %02x\n", data[0]);
331 break;
332 }
333}
334
335static void f81232_read_int_callback(struct urb *urb)
336{
337 struct usb_serial_port *port = urb->context;
338 unsigned char *data = urb->transfer_buffer;
339 unsigned int actual_length = urb->actual_length;
340 int status = urb->status;
341 int retval;
342
343 switch (status) {
344 case 0:
345 /* success */
346 break;
347 case -ECONNRESET:
348 case -ENOENT:
349 case -ESHUTDOWN:
350 /* this urb is terminated, clean up */
351 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
352 __func__, status);
353 return;
354 default:
355 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
356 __func__, status);
357 goto exit;
358 }
359
360 usb_serial_debug_data(&port->dev, __func__,
361 urb->actual_length, urb->transfer_buffer);
362
363 f81232_update_line_status(port, data, actual_length);
364
365exit:
366 retval = usb_submit_urb(urb, GFP_ATOMIC);
367 if (retval)
368 dev_err(&urb->dev->dev,
369 "%s - usb_submit_urb failed with result %d\n",
370 __func__, retval);
371}
372
373static char f81232_handle_lsr(struct usb_serial_port *port, u8 lsr)
374{
375 struct f81232_private *priv = usb_get_serial_port_data(port);
376 char tty_flag = TTY_NORMAL;
377
378 if (!(lsr & UART_LSR_BRK_ERROR_BITS))
379 return tty_flag;
380
381 if (lsr & UART_LSR_BI) {
382 tty_flag = TTY_BREAK;
383 port->icount.brk++;
384 usb_serial_handle_break(port);
385 } else if (lsr & UART_LSR_PE) {
386 tty_flag = TTY_PARITY;
387 port->icount.parity++;
388 } else if (lsr & UART_LSR_FE) {
389 tty_flag = TTY_FRAME;
390 port->icount.frame++;
391 }
392
393 if (lsr & UART_LSR_OE) {
394 port->icount.overrun++;
395 schedule_work(&priv->lsr_work);
396 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
397 }
398
399 return tty_flag;
400}
401
402static void f81232_process_read_urb(struct urb *urb)
403{
404 struct usb_serial_port *port = urb->context;
405 unsigned char *data = urb->transfer_buffer;
406 char tty_flag;
407 unsigned int i;
408 u8 lsr;
409
410 /*
411 * When opening the port we get a 1-byte packet with the current LSR,
412 * which we discard.
413 */
414 if ((urb->actual_length < 2) || (urb->actual_length % 2))
415 return;
416
417 /* bulk-in data: [LSR(1Byte)+DATA(1Byte)][LSR(1Byte)+DATA(1Byte)]... */
418
419 for (i = 0; i < urb->actual_length; i += 2) {
420 lsr = data[i];
421 tty_flag = f81232_handle_lsr(port, lsr);
422
423 if (port->sysrq) {
424 if (usb_serial_handle_sysrq_char(port, data[i + 1]))
425 continue;
426 }
427
428 tty_insert_flip_char(&port->port, data[i + 1], tty_flag);
429 }
430
431 tty_flip_buffer_push(&port->port);
432}
433
434static void f81534a_process_read_urb(struct urb *urb)
435{
436 struct usb_serial_port *port = urb->context;
437 unsigned char *data = urb->transfer_buffer;
438 char tty_flag;
439 unsigned int i;
440 u8 lsr;
441 u8 len;
442
443 if (urb->actual_length < 3) {
444 dev_err(&port->dev, "short message received: %d\n",
445 urb->actual_length);
446 return;
447 }
448
449 len = data[0];
450 if (len != urb->actual_length) {
451 dev_err(&port->dev, "malformed message received: %d (%d)\n",
452 urb->actual_length, len);
453 return;
454 }
455
456 /* bulk-in data: [LEN][Data.....][LSR] */
457 lsr = data[len - 1];
458 tty_flag = f81232_handle_lsr(port, lsr);
459
460 if (port->sysrq) {
461 for (i = 1; i < len - 1; ++i) {
462 if (!usb_serial_handle_sysrq_char(port, data[i])) {
463 tty_insert_flip_char(&port->port, data[i],
464 tty_flag);
465 }
466 }
467 } else {
468 tty_insert_flip_string_fixed_flag(&port->port, &data[1],
469 tty_flag, len - 2);
470 }
471
472 tty_flip_buffer_push(&port->port);
473}
474
475static void f81232_break_ctl(struct tty_struct *tty, int break_state)
476{
477 struct usb_serial_port *port = tty->driver_data;
478 struct f81232_private *priv = usb_get_serial_port_data(port);
479 int status;
480
481 mutex_lock(&priv->lock);
482
483 if (break_state)
484 priv->shadow_lcr |= UART_LCR_SBC;
485 else
486 priv->shadow_lcr &= ~UART_LCR_SBC;
487
488 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
489 priv->shadow_lcr);
490 if (status)
491 dev_err(&port->dev, "set break failed: %d\n", status);
492
493 mutex_unlock(&priv->lock);
494}
495
496static int f81232_find_clk(speed_t baudrate)
497{
498 int idx;
499
500 for (idx = 0; idx < ARRAY_SIZE(baudrate_table); ++idx) {
501 if (baudrate <= baudrate_table[idx] &&
502 baudrate_table[idx] % baudrate == 0)
503 return idx;
504 }
505
506 return -EINVAL;
507}
508
509static void f81232_set_baudrate(struct tty_struct *tty,
510 struct usb_serial_port *port, speed_t baudrate,
511 speed_t old_baudrate)
512{
513 struct f81232_private *priv = usb_get_serial_port_data(port);
514 u8 lcr;
515 int divisor;
516 int status = 0;
517 int i;
518 int idx;
519 speed_t baud_list[] = { baudrate, old_baudrate, F81232_DEF_BAUDRATE };
520
521 for (i = 0; i < ARRAY_SIZE(baud_list); ++i) {
522 idx = f81232_find_clk(baud_list[i]);
523 if (idx >= 0) {
524 baudrate = baud_list[i];
525 tty_encode_baud_rate(tty, baudrate, baudrate);
526 break;
527 }
528 }
529
530 if (idx < 0)
531 return;
532
533 priv->baud_base = baudrate_table[idx];
534 divisor = calc_baud_divisor(baudrate, priv->baud_base);
535
536 status = f81232_set_mask_register(port, F81232_CLK_REGISTER,
537 F81232_CLK_MASK, clock_table[idx]);
538 if (status) {
539 dev_err(&port->dev, "%s failed to set CLK_REG: %d\n",
540 __func__, status);
541 return;
542 }
543
544 status = f81232_get_register(port, LINE_CONTROL_REGISTER,
545 &lcr); /* get LCR */
546 if (status) {
547 dev_err(&port->dev, "%s failed to get LCR: %d\n",
548 __func__, status);
549 return;
550 }
551
552 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
553 lcr | UART_LCR_DLAB); /* Enable DLAB */
554 if (status) {
555 dev_err(&port->dev, "%s failed to set DLAB: %d\n",
556 __func__, status);
557 return;
558 }
559
560 status = f81232_set_register(port, RECEIVE_BUFFER_REGISTER,
561 divisor & 0x00ff); /* low */
562 if (status) {
563 dev_err(&port->dev, "%s failed to set baudrate MSB: %d\n",
564 __func__, status);
565 goto reapply_lcr;
566 }
567
568 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
569 (divisor & 0xff00) >> 8); /* high */
570 if (status) {
571 dev_err(&port->dev, "%s failed to set baudrate LSB: %d\n",
572 __func__, status);
573 }
574
575reapply_lcr:
576 status = f81232_set_register(port, LINE_CONTROL_REGISTER,
577 lcr & ~UART_LCR_DLAB);
578 if (status) {
579 dev_err(&port->dev, "%s failed to set DLAB: %d\n",
580 __func__, status);
581 }
582}
583
584static int f81232_port_enable(struct usb_serial_port *port)
585{
586 u8 val;
587 int status;
588
589 /* fifo on, trigger8, clear TX/RX*/
590 val = UART_FCR_TRIGGER_8 | UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
591 UART_FCR_CLEAR_XMIT;
592
593 status = f81232_set_register(port, FIFO_CONTROL_REGISTER, val);
594 if (status) {
595 dev_err(&port->dev, "%s failed to set FCR: %d\n",
596 __func__, status);
597 return status;
598 }
599
600 /* MSR Interrupt only, LSR will read from Bulk-in odd byte */
601 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER,
602 UART_IER_MSI);
603 if (status) {
604 dev_err(&port->dev, "%s failed to set IER: %d\n",
605 __func__, status);
606 return status;
607 }
608
609 return 0;
610}
611
612static int f81232_port_disable(struct usb_serial_port *port)
613{
614 int status;
615
616 status = f81232_set_register(port, INTERRUPT_ENABLE_REGISTER, 0);
617 if (status) {
618 dev_err(&port->dev, "%s failed to set IER: %d\n",
619 __func__, status);
620 return status;
621 }
622
623 return 0;
624}
625
626static void f81232_set_termios(struct tty_struct *tty,
627 struct usb_serial_port *port, struct ktermios *old_termios)
628{
629 struct f81232_private *priv = usb_get_serial_port_data(port);
630 u8 new_lcr = 0;
631 int status = 0;
632 speed_t baudrate;
633 speed_t old_baud;
634
635 /* Don't change anything if nothing has changed */
636 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
637 return;
638
639 if (C_BAUD(tty) == B0)
640 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
641 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
642 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
643
644 baudrate = tty_get_baud_rate(tty);
645 if (baudrate > 0) {
646 if (old_termios)
647 old_baud = tty_termios_baud_rate(old_termios);
648 else
649 old_baud = F81232_DEF_BAUDRATE;
650
651 f81232_set_baudrate(tty, port, baudrate, old_baud);
652 }
653
654 if (C_PARENB(tty)) {
655 new_lcr |= UART_LCR_PARITY;
656
657 if (!C_PARODD(tty))
658 new_lcr |= UART_LCR_EPAR;
659
660 if (C_CMSPAR(tty))
661 new_lcr |= UART_LCR_SPAR;
662 }
663
664 if (C_CSTOPB(tty))
665 new_lcr |= UART_LCR_STOP;
666
667 switch (C_CSIZE(tty)) {
668 case CS5:
669 new_lcr |= UART_LCR_WLEN5;
670 break;
671 case CS6:
672 new_lcr |= UART_LCR_WLEN6;
673 break;
674 case CS7:
675 new_lcr |= UART_LCR_WLEN7;
676 break;
677 default:
678 case CS8:
679 new_lcr |= UART_LCR_WLEN8;
680 break;
681 }
682
683 mutex_lock(&priv->lock);
684
685 new_lcr |= (priv->shadow_lcr & UART_LCR_SBC);
686 status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr);
687 if (status) {
688 dev_err(&port->dev, "%s failed to set LCR: %d\n",
689 __func__, status);
690 }
691
692 priv->shadow_lcr = new_lcr;
693
694 mutex_unlock(&priv->lock);
695}
696
697static int f81232_tiocmget(struct tty_struct *tty)
698{
699 int r;
700 struct usb_serial_port *port = tty->driver_data;
701 struct f81232_private *port_priv = usb_get_serial_port_data(port);
702 u8 mcr, msr;
703
704 /* force get current MSR changed state */
705 f81232_read_msr(port);
706
707 mutex_lock(&port_priv->lock);
708 mcr = port_priv->modem_control;
709 msr = port_priv->modem_status;
710 mutex_unlock(&port_priv->lock);
711
712 r = (mcr & UART_MCR_DTR ? TIOCM_DTR : 0) |
713 (mcr & UART_MCR_RTS ? TIOCM_RTS : 0) |
714 (msr & UART_MSR_CTS ? TIOCM_CTS : 0) |
715 (msr & UART_MSR_DCD ? TIOCM_CAR : 0) |
716 (msr & UART_MSR_RI ? TIOCM_RI : 0) |
717 (msr & UART_MSR_DSR ? TIOCM_DSR : 0);
718
719 return r;
720}
721
722static int f81232_tiocmset(struct tty_struct *tty,
723 unsigned int set, unsigned int clear)
724{
725 struct usb_serial_port *port = tty->driver_data;
726
727 return f81232_set_mctrl(port, set, clear);
728}
729
730static int f81232_open(struct tty_struct *tty, struct usb_serial_port *port)
731{
732 int result;
733
734 result = f81232_port_enable(port);
735 if (result)
736 return result;
737
738 /* Setup termios */
739 if (tty)
740 f81232_set_termios(tty, port, NULL);
741
742 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
743 if (result) {
744 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
745 " error %d\n", __func__, result);
746 return result;
747 }
748
749 result = usb_serial_generic_open(tty, port);
750 if (result) {
751 usb_kill_urb(port->interrupt_in_urb);
752 return result;
753 }
754
755 return 0;
756}
757
758static int f81534a_open(struct tty_struct *tty, struct usb_serial_port *port)
759{
760 int status;
761 u8 mask;
762 u8 val;
763
764 val = F81534A_TRIGGER_MULTIPLE_4X | F81534A_FIFO_128BYTE;
765 mask = F81534A_TRIGGER_MASK | F81534A_FIFO_128BYTE;
766
767 status = f81232_set_mask_register(port, F81534A_MODE_REG, mask, val);
768 if (status) {
769 dev_err(&port->dev, "failed to set MODE_REG: %d\n", status);
770 return status;
771 }
772
773 return f81232_open(tty, port);
774}
775
776static void f81232_close(struct usb_serial_port *port)
777{
778 struct f81232_private *port_priv = usb_get_serial_port_data(port);
779
780 f81232_port_disable(port);
781 usb_serial_generic_close(port);
782 usb_kill_urb(port->interrupt_in_urb);
783 flush_work(&port_priv->interrupt_work);
784 flush_work(&port_priv->lsr_work);
785}
786
787static void f81232_dtr_rts(struct usb_serial_port *port, int on)
788{
789 if (on)
790 f81232_set_mctrl(port, TIOCM_DTR | TIOCM_RTS, 0);
791 else
792 f81232_set_mctrl(port, 0, TIOCM_DTR | TIOCM_RTS);
793}
794
795static bool f81232_tx_empty(struct usb_serial_port *port)
796{
797 int status;
798 u8 tmp;
799
800 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
801 if (!status) {
802 if ((tmp & UART_LSR_TEMT) != UART_LSR_TEMT)
803 return false;
804 }
805
806 return true;
807}
808
809static int f81232_carrier_raised(struct usb_serial_port *port)
810{
811 u8 msr;
812 struct f81232_private *priv = usb_get_serial_port_data(port);
813
814 mutex_lock(&priv->lock);
815 msr = priv->modem_status;
816 mutex_unlock(&priv->lock);
817
818 if (msr & UART_MSR_DCD)
819 return 1;
820 return 0;
821}
822
823static int f81232_get_serial_info(struct tty_struct *tty,
824 struct serial_struct *ss)
825{
826 struct usb_serial_port *port = tty->driver_data;
827 struct f81232_private *priv = usb_get_serial_port_data(port);
828
829 ss->type = PORT_16550A;
830 ss->line = port->minor;
831 ss->port = port->port_number;
832 ss->baud_base = priv->baud_base;
833 return 0;
834}
835
836static void f81232_interrupt_work(struct work_struct *work)
837{
838 struct f81232_private *priv =
839 container_of(work, struct f81232_private, interrupt_work);
840
841 f81232_read_msr(priv->port);
842}
843
844static void f81232_lsr_worker(struct work_struct *work)
845{
846 struct f81232_private *priv;
847 struct usb_serial_port *port;
848 int status;
849 u8 tmp;
850
851 priv = container_of(work, struct f81232_private, lsr_work);
852 port = priv->port;
853
854 status = f81232_get_register(port, LINE_STATUS_REGISTER, &tmp);
855 if (status)
856 dev_warn(&port->dev, "read LSR failed: %d\n", status);
857}
858
859static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg,
860 u16 size, void *val)
861{
862 struct usb_device *dev = interface_to_usbdev(intf);
863 int retry = F81534A_ACCESS_REG_RETRY;
864 int status;
865 u8 *tmp;
866
867 tmp = kmemdup(val, size, GFP_KERNEL);
868 if (!tmp)
869 return -ENOMEM;
870
871 while (retry--) {
872 status = usb_control_msg(dev,
873 usb_sndctrlpipe(dev, 0),
874 F81232_REGISTER_REQUEST,
875 F81232_SET_REGISTER,
876 reg,
877 0,
878 tmp,
879 size,
880 USB_CTRL_SET_TIMEOUT);
881 if (status < 0) {
882 status = usb_translate_errors(status);
883 if (status == -EIO)
884 continue;
885 } else {
886 status = 0;
887 }
888
889 break;
890 }
891
892 if (status) {
893 dev_err(&intf->dev, "failed to set register 0x%x: %d\n",
894 reg, status);
895 }
896
897 kfree(tmp);
898 return status;
899}
900
901static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en)
902{
903 unsigned char enable[2] = {0};
904 int status;
905
906 /*
907 * Enable all available serial ports, define as following:
908 * bit 15 : Reset behavior (when HUB got soft reset)
909 * 0: maintain all serial port enabled state.
910 * 1: disable all serial port.
911 * bit 0~11 : Serial port enable bit.
912 */
913 if (en) {
914 enable[0] = 0xff;
915 enable[1] = 0x8f;
916 }
917
918 status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT,
919 sizeof(enable), enable);
920 if (status)
921 dev_err(&intf->dev, "failed to enable ports: %d\n", status);
922
923 return status;
924}
925
926static int f81534a_ctrl_probe(struct usb_interface *intf,
927 const struct usb_device_id *id)
928{
929 return f81534a_ctrl_enable_all_ports(intf, true);
930}
931
932static void f81534a_ctrl_disconnect(struct usb_interface *intf)
933{
934 f81534a_ctrl_enable_all_ports(intf, false);
935}
936
937static int f81534a_ctrl_resume(struct usb_interface *intf)
938{
939 return f81534a_ctrl_enable_all_ports(intf, true);
940}
941
942static int f81232_port_probe(struct usb_serial_port *port)
943{
944 struct f81232_private *priv;
945
946 priv = devm_kzalloc(&port->dev, sizeof(*priv), GFP_KERNEL);
947 if (!priv)
948 return -ENOMEM;
949
950 mutex_init(&priv->lock);
951 INIT_WORK(&priv->interrupt_work, f81232_interrupt_work);
952 INIT_WORK(&priv->lsr_work, f81232_lsr_worker);
953
954 usb_set_serial_port_data(port, priv);
955
956 port->port.drain_delay = 256;
957 priv->port = port;
958
959 return 0;
960}
961
962static int f81534a_port_probe(struct usb_serial_port *port)
963{
964 int status;
965
966 /* tri-state with pull-high, default RS232 Mode */
967 status = f81232_set_register(port, F81534A_GPIO_REG,
968 F81534A_GPIO_MODE2_DIR);
969 if (status)
970 return status;
971
972 return f81232_port_probe(port);
973}
974
975static int f81232_suspend(struct usb_serial *serial, pm_message_t message)
976{
977 struct usb_serial_port *port = serial->port[0];
978 struct f81232_private *port_priv = usb_get_serial_port_data(port);
979 int i;
980
981 for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
982 usb_kill_urb(port->read_urbs[i]);
983
984 usb_kill_urb(port->interrupt_in_urb);
985
986 if (port_priv) {
987 flush_work(&port_priv->interrupt_work);
988 flush_work(&port_priv->lsr_work);
989 }
990
991 return 0;
992}
993
994static int f81232_resume(struct usb_serial *serial)
995{
996 struct usb_serial_port *port = serial->port[0];
997 int result;
998
999 if (tty_port_initialized(&port->port)) {
1000 result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
1001 if (result) {
1002 dev_err(&port->dev, "submit interrupt urb failed: %d\n",
1003 result);
1004 return result;
1005 }
1006 }
1007
1008 return usb_serial_generic_resume(serial);
1009}
1010
1011static struct usb_serial_driver f81232_device = {
1012 .driver = {
1013 .owner = THIS_MODULE,
1014 .name = "f81232",
1015 },
1016 .id_table = f81232_id_table,
1017 .num_ports = 1,
1018 .bulk_in_size = 256,
1019 .bulk_out_size = 256,
1020 .open = f81232_open,
1021 .close = f81232_close,
1022 .dtr_rts = f81232_dtr_rts,
1023 .carrier_raised = f81232_carrier_raised,
1024 .get_serial = f81232_get_serial_info,
1025 .break_ctl = f81232_break_ctl,
1026 .set_termios = f81232_set_termios,
1027 .tiocmget = f81232_tiocmget,
1028 .tiocmset = f81232_tiocmset,
1029 .tiocmiwait = usb_serial_generic_tiocmiwait,
1030 .tx_empty = f81232_tx_empty,
1031 .process_read_urb = f81232_process_read_urb,
1032 .read_int_callback = f81232_read_int_callback,
1033 .port_probe = f81232_port_probe,
1034 .suspend = f81232_suspend,
1035 .resume = f81232_resume,
1036};
1037
1038static struct usb_serial_driver f81534a_device = {
1039 .driver = {
1040 .owner = THIS_MODULE,
1041 .name = "f81534a",
1042 },
1043 .id_table = f81534a_id_table,
1044 .num_ports = 1,
1045 .open = f81534a_open,
1046 .close = f81232_close,
1047 .dtr_rts = f81232_dtr_rts,
1048 .carrier_raised = f81232_carrier_raised,
1049 .get_serial = f81232_get_serial_info,
1050 .break_ctl = f81232_break_ctl,
1051 .set_termios = f81232_set_termios,
1052 .tiocmget = f81232_tiocmget,
1053 .tiocmset = f81232_tiocmset,
1054 .tiocmiwait = usb_serial_generic_tiocmiwait,
1055 .tx_empty = f81232_tx_empty,
1056 .process_read_urb = f81534a_process_read_urb,
1057 .read_int_callback = f81232_read_int_callback,
1058 .port_probe = f81534a_port_probe,
1059 .suspend = f81232_suspend,
1060 .resume = f81232_resume,
1061};
1062
1063static struct usb_serial_driver * const serial_drivers[] = {
1064 &f81232_device,
1065 &f81534a_device,
1066 NULL,
1067};
1068
1069static struct usb_driver f81534a_ctrl_driver = {
1070 .name = "f81534a_ctrl",
1071 .id_table = f81534a_ctrl_id_table,
1072 .probe = f81534a_ctrl_probe,
1073 .disconnect = f81534a_ctrl_disconnect,
1074 .resume = f81534a_ctrl_resume,
1075};
1076
1077static int __init f81232_init(void)
1078{
1079 int status;
1080
1081 status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE,
1082 KBUILD_MODNAME);
1083 if (status)
1084 return status;
1085
1086 status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME,
1087 combined_id_table);
1088 if (status) {
1089 usb_deregister(&f81534a_ctrl_driver);
1090 return status;
1091 }
1092
1093 return 0;
1094}
1095
1096static void __exit f81232_exit(void)
1097{
1098 usb_serial_deregister_drivers(serial_drivers);
1099 usb_deregister(&f81534a_ctrl_driver);
1100}
1101
1102module_init(f81232_init);
1103module_exit(f81232_exit);
1104
1105MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver");
1106MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
1107MODULE_AUTHOR("Peter Hong <peter_hong@fintek.com.tw>");
1108MODULE_LICENSE("GPL v2");