2 * Prolific PL2303 USB to serial adaptor driver
4 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2003 IBM Corp.
7 * Copyright (C) 2009, 2013 Frank Schäfer <fschaefer.oss@googlemail.com>
8 * - fixes, improvements and documentation for the baud rate encoding methods
9 * Copyright (C) 2013 Reinhard Max <max@suse.de>
10 * - fixes and improvements for the divisor based baud rate encoding method
12 * Original driver for 2.2.x by anonymous
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License version
16 * 2 as published by the Free Software Foundation.
18 * See Documentation/usb/usb-serial.txt for more information on using this
23 #include <linux/kernel.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/tty.h>
28 #include <linux/tty_driver.h>
29 #include <linux/tty_flip.h>
30 #include <linux/serial.h>
31 #include <linux/module.h>
32 #include <linux/moduleparam.h>
33 #include <linux/spinlock.h>
34 #include <linux/uaccess.h>
35 #include <linux/usb.h>
36 #include <linux/usb/serial.h>
37 #include <asm/unaligned.h>
43 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
45 static const struct usb_device_id id_table[] = {
46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
51 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
52 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
56 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
57 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
58 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
59 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
60 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
61 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
62 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
63 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
64 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
65 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
66 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
67 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
68 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
69 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
70 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
71 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
72 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
76 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
77 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
78 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
79 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
80 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
81 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
82 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
83 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
84 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
85 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
86 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
87 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
88 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
89 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
90 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
91 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
92 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
93 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
94 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
95 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
96 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
97 { } /* Terminating entry */
100 MODULE_DEVICE_TABLE(usb, id_table);
102 #define SET_LINE_REQUEST_TYPE 0x21
103 #define SET_LINE_REQUEST 0x20
105 #define SET_CONTROL_REQUEST_TYPE 0x21
106 #define SET_CONTROL_REQUEST 0x22
107 #define CONTROL_DTR 0x01
108 #define CONTROL_RTS 0x02
110 #define BREAK_REQUEST_TYPE 0x21
111 #define BREAK_REQUEST 0x23
112 #define BREAK_ON 0xffff
113 #define BREAK_OFF 0x0000
115 #define GET_LINE_REQUEST_TYPE 0xa1
116 #define GET_LINE_REQUEST 0x21
118 #define VENDOR_WRITE_REQUEST_TYPE 0x40
119 #define VENDOR_WRITE_REQUEST 0x01
121 #define VENDOR_READ_REQUEST_TYPE 0xc0
122 #define VENDOR_READ_REQUEST 0x01
124 #define UART_STATE 0x08
125 #define UART_STATE_TRANSIENT_MASK 0x74
126 #define UART_DCD 0x01
127 #define UART_DSR 0x02
128 #define UART_BREAK_ERROR 0x04
129 #define UART_RING 0x08
130 #define UART_FRAME_ERROR 0x10
131 #define UART_PARITY_ERROR 0x20
132 #define UART_OVERRUN_ERROR 0x40
133 #define UART_CTS 0x80
137 type_0, /* don't know the difference between type 0 and */
138 type_1, /* type 1, until someone from prolific tells us... */
139 HX, /* HX version of the pl2303 chip */
142 struct pl2303_serial_private {
143 enum pl2303_type type;
146 struct pl2303_private {
152 static int pl2303_vendor_read(__u16 value, __u16 index,
153 struct usb_serial *serial, unsigned char *buf)
155 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
156 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
157 value, index, buf, 1, 100);
158 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n",
159 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
164 static int pl2303_vendor_write(__u16 value, __u16 index,
165 struct usb_serial *serial)
167 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
168 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
169 value, index, NULL, 0, 100);
170 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n",
171 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
176 static int pl2303_startup(struct usb_serial *serial)
178 struct pl2303_serial_private *spriv;
179 enum pl2303_type type = type_0;
180 char *type_str = "unknown (treating as type_0)";
183 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
187 buf = kmalloc(10, GFP_KERNEL);
193 if (serial->dev->descriptor.bDeviceClass == 0x02) {
196 } else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) {
199 } else if (serial->dev->descriptor.bDeviceClass == 0x00
200 || serial->dev->descriptor.bDeviceClass == 0xFF) {
204 dev_dbg(&serial->interface->dev, "device type: %s\n", type_str);
207 usb_set_serial_data(serial, spriv);
209 pl2303_vendor_read(0x8484, 0, serial, buf);
210 pl2303_vendor_write(0x0404, 0, serial);
211 pl2303_vendor_read(0x8484, 0, serial, buf);
212 pl2303_vendor_read(0x8383, 0, serial, buf);
213 pl2303_vendor_read(0x8484, 0, serial, buf);
214 pl2303_vendor_write(0x0404, 1, serial);
215 pl2303_vendor_read(0x8484, 0, serial, buf);
216 pl2303_vendor_read(0x8383, 0, serial, buf);
217 pl2303_vendor_write(0, 1, serial);
218 pl2303_vendor_write(1, 0, serial);
220 pl2303_vendor_write(2, 0x44, serial);
222 pl2303_vendor_write(2, 0x24, serial);
228 static void pl2303_release(struct usb_serial *serial)
230 struct pl2303_serial_private *spriv;
232 spriv = usb_get_serial_data(serial);
236 static int pl2303_port_probe(struct usb_serial_port *port)
238 struct pl2303_private *priv;
240 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
244 spin_lock_init(&priv->lock);
246 usb_set_serial_port_data(port, priv);
248 port->port.drain_delay = 256;
253 static int pl2303_port_remove(struct usb_serial_port *port)
255 struct pl2303_private *priv;
257 priv = usb_get_serial_port_data(port);
263 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
265 struct usb_device *dev = port->serial->dev;
268 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
269 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
270 value, 0, NULL, 0, 100);
271 dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
276 static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type,
280 * NOTE: Only the values defined in baud_sup are supported !
281 * => if unsupported values are set, the PL2303 seems to
282 * use 9600 baud (at least my PL2303X always does)
284 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
285 4800, 7200, 9600, 14400, 19200, 28800, 38400,
286 57600, 115200, 230400, 460800, 614400, 921600,
287 1228800, 2457600, 3000000, 6000000 };
289 * NOTE: The PL2303HX (tested with rev. 3A) also supports the following
290 * baud rates: 128000, 134400, 161280, 201600, 268800, 403200, 806400.
291 * As long as we are not using this encoding method for them, there is
292 * no point in complicating the code to support them.
296 /* Set baudrate to nearest supported value */
297 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
298 if (baud_sup[i] > baud)
301 if (i == ARRAY_SIZE(baud_sup))
302 baud = baud_sup[i - 1];
303 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
304 baud = baud_sup[i - 1];
307 /* type_0, type_1 only support up to 1228800 baud */
309 baud = min_t(int, baud, 1228800);
310 /* Direct (standard) baud rate encoding method */
311 put_unaligned_le32(baud, buf);
316 static int pl2303_baudrate_encode_divisor(int baud, enum pl2303_type type,
320 * Divisor based baud rate encoding method
322 * NOTE: it's not clear if the type_0/1 chips support this method
324 * divisor = 12MHz * 32 / baudrate = 2^A * B
329 * B = buf[0] + (buf[1] & 0x01) << 8
332 * => 8 < B < 16: device seems to work not properly
333 * => B <= 8: device uses the max. value B = 512 instead
338 * NOTE: The Windows driver allows maximum baud rates of 110% of the
339 * specified maximium value.
340 * Quick tests with early (2004) HX (rev. A) chips suggest, that even
341 * higher baud rates (up to the maximum of 24M baud !) are working fine,
342 * but that should really be tested carefully in "real life" scenarios
343 * before removing the upper limit completely.
344 * Baud rates smaller than the specified 75 baud are definitely working
348 baud = min_t(int, baud, 6000000 * 1.1);
350 baud = min_t(int, baud, 1228800 * 1.1);
351 /* Determine factors A and B */
353 B = 12000000 * 32 / baud; /* 12MHz */
354 B <<= 1; /* Add one bit for rounding */
355 while (B > (512 << 1) && A <= 14) {
359 if (A > 14) { /* max. divisor = min. baudrate reached */
364 B = (B + 1) >> 1; /* Round the last bit */
366 /* Handle special cases */
368 B = 0; /* also: 1 to 8 */
371 * NOTE: With the current algorithm this happens
372 * only for A=0 and means that the min. divisor
373 * (respectively: the max. baudrate) is reached.
375 B = 16; /* => 24 MBaud */
376 /* Encode the baud rate */
377 buf[3] = 0x80; /* Select divisor encoding method */
379 buf[1] = (A & 0x0e); /* A */
380 buf[1] |= ((B & 0x100) >> 8); /* MSB of B */
381 buf[0] = B & 0xff; /* 8 LSBs of B */
382 /* Calculate the actual/resulting baud rate */
385 baud = 12000000 * 32 / ((1 << A) * B);
390 static void pl2303_encode_baudrate(struct tty_struct *tty,
391 struct usb_serial_port *port,
392 enum pl2303_type type,
397 baud = tty_get_baud_rate(tty);
398 dev_dbg(&port->dev, "baud requested = %d\n", baud);
402 * There are two methods for setting/encoding the baud rate
403 * 1) Direct method: encodes the baud rate value directly
404 * => supported by all chip types
405 * 2) Divisor based method: encodes a divisor to a base value (12MHz*32)
406 * => supported by HX chips (and likely not by type_0/1 chips)
408 * NOTE: Although the divisor based baud rate encoding method is much
409 * more flexible, some of the standard baud rate values can not be
410 * realized exactly. But the difference is very small (max. 0.2%) and
411 * the device likely uses the same baud rate generator for both methods
412 * so that there is likley no difference.
415 baud = pl2303_baudrate_encode_direct(baud, type, buf);
417 baud = pl2303_baudrate_encode_divisor(baud, type, buf);
418 /* Save resulting baud rate */
419 tty_encode_baud_rate(tty, baud, baud);
420 dev_dbg(&port->dev, "baud set = %d\n", baud);
423 static void pl2303_set_termios(struct tty_struct *tty,
424 struct usb_serial_port *port, struct ktermios *old_termios)
426 struct usb_serial *serial = port->serial;
427 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
428 struct pl2303_private *priv = usb_get_serial_port_data(port);
435 * The PL2303 is reported to lose bytes if you change serial settings
436 * even to the same values as before. Thus we actually need to filter
437 * in this specific case.
439 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
442 buf = kzalloc(7, GFP_KERNEL);
444 dev_err(&port->dev, "%s - out of memory.\n", __func__);
445 /* Report back no change occurred */
447 tty->termios = *old_termios;
451 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
452 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
454 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
457 switch (C_CSIZE(tty)) {
471 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
474 /* For reference: buf[0]:buf[3] baud rate value */
475 pl2303_encode_baudrate(tty, port, spriv->type, buf);
477 /* For reference buf[4]=0 is 1 stop bits */
478 /* For reference buf[4]=1 is 1.5 stop bits */
479 /* For reference buf[4]=2 is 2 stop bits */
482 * NOTE: Comply with "real" UARTs / RS232:
483 * use 1.5 instead of 2 stop bits with 5 data bits
485 if (C_CSIZE(tty) == CS5) {
487 dev_dbg(&port->dev, "stop bits = 1.5\n");
490 dev_dbg(&port->dev, "stop bits = 2\n");
494 dev_dbg(&port->dev, "stop bits = 1\n");
498 /* For reference buf[5]=0 is none parity */
499 /* For reference buf[5]=1 is odd parity */
500 /* For reference buf[5]=2 is even parity */
501 /* For reference buf[5]=3 is mark parity */
502 /* For reference buf[5]=4 is space parity */
504 if (tty->termios.c_cflag & CMSPAR) {
506 dev_dbg(&port->dev, "parity = mark\n");
509 dev_dbg(&port->dev, "parity = odd\n");
512 if (tty->termios.c_cflag & CMSPAR) {
514 dev_dbg(&port->dev, "parity = space\n");
517 dev_dbg(&port->dev, "parity = even\n");
522 dev_dbg(&port->dev, "parity = none\n");
525 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
526 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
528 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
530 /* change control lines if we are switching to or from B0 */
531 spin_lock_irqsave(&priv->lock, flags);
532 control = priv->line_control;
533 if (C_BAUD(tty) == B0)
534 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
535 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
536 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
537 if (control != priv->line_control) {
538 control = priv->line_control;
539 spin_unlock_irqrestore(&priv->lock, flags);
540 pl2303_set_control_lines(port, control);
542 spin_unlock_irqrestore(&priv->lock, flags);
546 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
547 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
549 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
551 if (C_CRTSCTS(tty)) {
552 if (spriv->type == HX)
553 pl2303_vendor_write(0x0, 0x61, serial);
555 pl2303_vendor_write(0x0, 0x41, serial);
557 pl2303_vendor_write(0x0, 0x0, serial);
563 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
565 struct pl2303_private *priv = usb_get_serial_port_data(port);
569 spin_lock_irqsave(&priv->lock, flags);
570 /* Change DTR and RTS */
572 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
574 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
575 control = priv->line_control;
576 spin_unlock_irqrestore(&priv->lock, flags);
577 pl2303_set_control_lines(port, control);
580 static void pl2303_close(struct usb_serial_port *port)
582 usb_serial_generic_close(port);
583 usb_kill_urb(port->interrupt_in_urb);
586 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
588 struct usb_serial *serial = port->serial;
589 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
592 if (spriv->type != HX) {
593 usb_clear_halt(serial->dev, port->write_urb->pipe);
594 usb_clear_halt(serial->dev, port->read_urb->pipe);
596 /* reset upstream data pipes */
597 pl2303_vendor_write(8, 0, serial);
598 pl2303_vendor_write(9, 0, serial);
603 pl2303_set_termios(tty, port, NULL);
605 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
607 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
608 " error %d\n", __func__, result);
612 result = usb_serial_generic_open(tty, port);
614 usb_kill_urb(port->interrupt_in_urb);
621 static int pl2303_tiocmset(struct tty_struct *tty,
622 unsigned int set, unsigned int clear)
624 struct usb_serial_port *port = tty->driver_data;
625 struct pl2303_private *priv = usb_get_serial_port_data(port);
630 spin_lock_irqsave(&priv->lock, flags);
632 priv->line_control |= CONTROL_RTS;
634 priv->line_control |= CONTROL_DTR;
635 if (clear & TIOCM_RTS)
636 priv->line_control &= ~CONTROL_RTS;
637 if (clear & TIOCM_DTR)
638 priv->line_control &= ~CONTROL_DTR;
639 control = priv->line_control;
640 spin_unlock_irqrestore(&priv->lock, flags);
642 ret = pl2303_set_control_lines(port, control);
644 return usb_translate_errors(ret);
649 static int pl2303_tiocmget(struct tty_struct *tty)
651 struct usb_serial_port *port = tty->driver_data;
652 struct pl2303_private *priv = usb_get_serial_port_data(port);
658 spin_lock_irqsave(&priv->lock, flags);
659 mcr = priv->line_control;
660 status = priv->line_status;
661 spin_unlock_irqrestore(&priv->lock, flags);
663 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
664 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
665 | ((status & UART_CTS) ? TIOCM_CTS : 0)
666 | ((status & UART_DSR) ? TIOCM_DSR : 0)
667 | ((status & UART_RING) ? TIOCM_RI : 0)
668 | ((status & UART_DCD) ? TIOCM_CD : 0);
670 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
675 static int pl2303_carrier_raised(struct usb_serial_port *port)
677 struct pl2303_private *priv = usb_get_serial_port_data(port);
678 if (priv->line_status & UART_DCD)
683 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
685 struct usb_serial_port *port = tty->driver_data;
686 struct pl2303_private *priv = usb_get_serial_port_data(port);
688 unsigned int prevstatus;
690 unsigned int changed;
692 spin_lock_irqsave(&priv->lock, flags);
693 prevstatus = priv->line_status;
694 spin_unlock_irqrestore(&priv->lock, flags);
697 interruptible_sleep_on(&port->port.delta_msr_wait);
698 /* see if a signal did it */
699 if (signal_pending(current))
702 if (port->serial->disconnected)
705 spin_lock_irqsave(&priv->lock, flags);
706 status = priv->line_status;
707 spin_unlock_irqrestore(&priv->lock, flags);
709 changed = prevstatus ^ status;
711 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
712 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
713 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
714 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
723 static int pl2303_ioctl(struct tty_struct *tty,
724 unsigned int cmd, unsigned long arg)
726 struct serial_struct ser;
727 struct usb_serial_port *port = tty->driver_data;
729 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
733 memset(&ser, 0, sizeof ser);
734 ser.type = PORT_16654;
735 ser.line = port->minor;
736 ser.port = port->port_number;
737 ser.baud_base = 460800;
739 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
744 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
750 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
752 struct usb_serial_port *port = tty->driver_data;
753 struct usb_serial *serial = port->serial;
757 if (break_state == 0)
761 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
762 state == BREAK_OFF ? "off" : "on");
764 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
765 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
768 dev_err(&port->dev, "error sending break = %d\n", result);
771 static void pl2303_update_line_status(struct usb_serial_port *port,
773 unsigned int actual_length)
776 struct pl2303_private *priv = usb_get_serial_port_data(port);
777 struct tty_struct *tty;
779 u8 status_idx = UART_STATE;
780 u8 length = UART_STATE + 1;
784 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
785 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
788 if (idv == SIEMENS_VENDOR_ID) {
789 if (idp == SIEMENS_PRODUCT_ID_X65 ||
790 idp == SIEMENS_PRODUCT_ID_SX1 ||
791 idp == SIEMENS_PRODUCT_ID_X75) {
798 if (actual_length < length)
801 /* Save off the uart status for others to look at */
802 spin_lock_irqsave(&priv->lock, flags);
803 prev_line_status = priv->line_status;
804 priv->line_status = data[status_idx];
805 spin_unlock_irqrestore(&priv->lock, flags);
806 if (priv->line_status & UART_BREAK_ERROR)
807 usb_serial_handle_break(port);
808 wake_up_interruptible(&port->port.delta_msr_wait);
810 tty = tty_port_tty_get(&port->port);
813 if ((priv->line_status ^ prev_line_status) & UART_DCD)
814 usb_serial_handle_dcd_change(port, tty,
815 priv->line_status & UART_DCD);
819 static void pl2303_read_int_callback(struct urb *urb)
821 struct usb_serial_port *port = urb->context;
822 unsigned char *data = urb->transfer_buffer;
823 unsigned int actual_length = urb->actual_length;
824 int status = urb->status;
834 /* this urb is terminated, clean up */
835 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
839 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
844 usb_serial_debug_data(&port->dev, __func__,
845 urb->actual_length, urb->transfer_buffer);
847 pl2303_update_line_status(port, data, actual_length);
850 retval = usb_submit_urb(urb, GFP_ATOMIC);
853 "%s - usb_submit_urb failed with result %d\n",
857 static void pl2303_process_read_urb(struct urb *urb)
859 struct usb_serial_port *port = urb->context;
860 struct pl2303_private *priv = usb_get_serial_port_data(port);
861 unsigned char *data = urb->transfer_buffer;
862 char tty_flag = TTY_NORMAL;
867 /* update line status */
868 spin_lock_irqsave(&priv->lock, flags);
869 line_status = priv->line_status;
870 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
871 spin_unlock_irqrestore(&priv->lock, flags);
872 wake_up_interruptible(&port->port.delta_msr_wait);
874 if (!urb->actual_length)
877 /* break takes precedence over parity, */
878 /* which takes precedence over framing errors */
879 if (line_status & UART_BREAK_ERROR)
880 tty_flag = TTY_BREAK;
881 else if (line_status & UART_PARITY_ERROR)
882 tty_flag = TTY_PARITY;
883 else if (line_status & UART_FRAME_ERROR)
884 tty_flag = TTY_FRAME;
886 if (tty_flag != TTY_NORMAL)
887 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
889 /* overrun is special, not associated with a char */
890 if (line_status & UART_OVERRUN_ERROR)
891 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
893 if (port->port.console && port->sysrq) {
894 for (i = 0; i < urb->actual_length; ++i)
895 if (!usb_serial_handle_sysrq_char(port, data[i]))
896 tty_insert_flip_char(&port->port, data[i],
899 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
903 tty_flip_buffer_push(&port->port);
906 /* All of the device info needed for the PL2303 SIO serial converter */
907 static struct usb_serial_driver pl2303_device = {
909 .owner = THIS_MODULE,
912 .id_table = id_table,
915 .bulk_out_size = 256,
917 .close = pl2303_close,
918 .dtr_rts = pl2303_dtr_rts,
919 .carrier_raised = pl2303_carrier_raised,
920 .ioctl = pl2303_ioctl,
921 .break_ctl = pl2303_break_ctl,
922 .set_termios = pl2303_set_termios,
923 .tiocmget = pl2303_tiocmget,
924 .tiocmset = pl2303_tiocmset,
925 .tiocmiwait = pl2303_tiocmiwait,
926 .process_read_urb = pl2303_process_read_urb,
927 .read_int_callback = pl2303_read_int_callback,
928 .attach = pl2303_startup,
929 .release = pl2303_release,
930 .port_probe = pl2303_port_probe,
931 .port_remove = pl2303_port_remove,
934 static struct usb_serial_driver * const serial_drivers[] = {
938 module_usb_serial_driver(serial_drivers, id_table);
940 MODULE_DESCRIPTION(DRIVER_DESC);
941 MODULE_LICENSE("GPL");