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;
182 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
186 buf = kmalloc(10, GFP_KERNEL);
192 if (serial->dev->descriptor.bDeviceClass == 0x02)
194 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
196 else if (serial->dev->descriptor.bDeviceClass == 0x00
197 || serial->dev->descriptor.bDeviceClass == 0xFF)
199 dev_dbg(&serial->interface->dev, "device type: %d\n", type);
202 usb_set_serial_data(serial, spriv);
204 pl2303_vendor_read(0x8484, 0, serial, buf);
205 pl2303_vendor_write(0x0404, 0, serial);
206 pl2303_vendor_read(0x8484, 0, serial, buf);
207 pl2303_vendor_read(0x8383, 0, serial, buf);
208 pl2303_vendor_read(0x8484, 0, serial, buf);
209 pl2303_vendor_write(0x0404, 1, serial);
210 pl2303_vendor_read(0x8484, 0, serial, buf);
211 pl2303_vendor_read(0x8383, 0, serial, buf);
212 pl2303_vendor_write(0, 1, serial);
213 pl2303_vendor_write(1, 0, serial);
215 pl2303_vendor_write(2, 0x44, serial);
217 pl2303_vendor_write(2, 0x24, serial);
223 static void pl2303_release(struct usb_serial *serial)
225 struct pl2303_serial_private *spriv;
227 spriv = usb_get_serial_data(serial);
231 static int pl2303_port_probe(struct usb_serial_port *port)
233 struct pl2303_private *priv;
235 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
239 spin_lock_init(&priv->lock);
241 usb_set_serial_port_data(port, priv);
243 port->port.drain_delay = 256;
248 static int pl2303_port_remove(struct usb_serial_port *port)
250 struct pl2303_private *priv;
252 priv = usb_get_serial_port_data(port);
258 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
260 struct usb_device *dev = port->serial->dev;
263 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
264 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
265 value, 0, NULL, 0, 100);
266 dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
271 static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type,
275 * NOTE: Only the values defined in baud_sup are supported !
276 * => if unsupported values are set, the PL2303 seems to
277 * use 9600 baud (at least my PL2303X always does)
279 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
280 4800, 7200, 9600, 14400, 19200, 28800, 38400,
281 57600, 115200, 230400, 460800, 614400, 921600,
282 1228800, 2457600, 3000000, 6000000 };
284 * NOTE: The PL2303HX (tested with rev. 3A) also supports the following
285 * baud rates: 128000, 134400, 161280, 201600, 268800, 403200, 806400.
286 * As long as we are not using this encoding method for them, there is
287 * no point in complicating the code to support them.
291 /* Set baudrate to nearest supported value */
292 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
293 if (baud_sup[i] > baud)
296 if (i == ARRAY_SIZE(baud_sup))
297 baud = baud_sup[i - 1];
298 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
299 baud = baud_sup[i - 1];
302 /* type_0, type_1 only support up to 1228800 baud */
304 baud = min_t(int, baud, 1228800);
305 /* Direct (standard) baud rate encoding method */
306 put_unaligned_le32(baud, buf);
311 static int pl2303_baudrate_encode_divisor(int baud, enum pl2303_type type,
315 * Divisor based baud rate encoding method
317 * NOTE: it's not clear if the type_0/1 chips support this method
319 * divisor = 12MHz * 32 / baudrate = 2^A * B
324 * B = buf[0] + (buf[1] & 0x01) << 8
327 * => 8 < B < 16: device seems to work not properly
328 * => B <= 8: device uses the max. value B = 512 instead
333 * NOTE: The Windows driver allows maximum baud rates of 110% of the
334 * specified maximium value.
335 * Quick tests with early (2004) HX (rev. A) chips suggest, that even
336 * higher baud rates (up to the maximum of 24M baud !) are working fine,
337 * but that should really be tested carefully in "real life" scenarios
338 * before removing the upper limit completely.
339 * Baud rates smaller than the specified 75 baud are definitely working
343 baud = min_t(int, baud, 6000000 * 1.1);
345 baud = min_t(int, baud, 1228800 * 1.1);
346 /* Determine factors A and B */
348 B = 12000000 * 32 / baud; /* 12MHz */
349 B <<= 1; /* Add one bit for rounding */
350 while (B > (512 << 1) && A <= 14) {
354 if (A > 14) { /* max. divisor = min. baudrate reached */
359 B = (B + 1) >> 1; /* Round the last bit */
361 /* Handle special cases */
363 B = 0; /* also: 1 to 8 */
366 * NOTE: With the current algorithm this happens
367 * only for A=0 and means that the min. divisor
368 * (respectively: the max. baudrate) is reached.
370 B = 16; /* => 24 MBaud */
371 /* Encode the baud rate */
372 buf[3] = 0x80; /* Select divisor encoding method */
374 buf[1] = (A & 0x0e); /* A */
375 buf[1] |= ((B & 0x100) >> 8); /* MSB of B */
376 buf[0] = B & 0xff; /* 8 LSBs of B */
377 /* Calculate the actual/resulting baud rate */
380 baud = 12000000 * 32 / ((1 << A) * B);
385 static void pl2303_encode_baudrate(struct tty_struct *tty,
386 struct usb_serial_port *port,
387 enum pl2303_type type,
392 baud = tty_get_baud_rate(tty);
393 dev_dbg(&port->dev, "baud requested = %d\n", baud);
397 * There are two methods for setting/encoding the baud rate
398 * 1) Direct method: encodes the baud rate value directly
399 * => supported by all chip types
400 * 2) Divisor based method: encodes a divisor to a base value (12MHz*32)
401 * => supported by HX chips (and likely not by type_0/1 chips)
403 * NOTE: Although the divisor based baud rate encoding method is much
404 * more flexible, some of the standard baud rate values can not be
405 * realized exactly. But the difference is very small (max. 0.2%) and
406 * the device likely uses the same baud rate generator for both methods
407 * so that there is likley no difference.
410 baud = pl2303_baudrate_encode_direct(baud, type, buf);
412 baud = pl2303_baudrate_encode_divisor(baud, type, buf);
413 /* Save resulting baud rate */
414 tty_encode_baud_rate(tty, baud, baud);
415 dev_dbg(&port->dev, "baud set = %d\n", baud);
418 static void pl2303_set_termios(struct tty_struct *tty,
419 struct usb_serial_port *port, struct ktermios *old_termios)
421 struct usb_serial *serial = port->serial;
422 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
423 struct pl2303_private *priv = usb_get_serial_port_data(port);
430 * The PL2303 is reported to lose bytes if you change serial settings
431 * even to the same values as before. Thus we actually need to filter
432 * in this specific case.
434 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
437 buf = kzalloc(7, GFP_KERNEL);
439 dev_err(&port->dev, "%s - out of memory.\n", __func__);
440 /* Report back no change occurred */
442 tty->termios = *old_termios;
446 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
447 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
449 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
452 switch (C_CSIZE(tty)) {
466 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
469 /* For reference: buf[0]:buf[3] baud rate value */
470 pl2303_encode_baudrate(tty, port, spriv->type, buf);
472 /* For reference buf[4]=0 is 1 stop bits */
473 /* For reference buf[4]=1 is 1.5 stop bits */
474 /* For reference buf[4]=2 is 2 stop bits */
477 * NOTE: Comply with "real" UARTs / RS232:
478 * use 1.5 instead of 2 stop bits with 5 data bits
480 if (C_CSIZE(tty) == CS5) {
482 dev_dbg(&port->dev, "stop bits = 1.5\n");
485 dev_dbg(&port->dev, "stop bits = 2\n");
489 dev_dbg(&port->dev, "stop bits = 1\n");
493 /* For reference buf[5]=0 is none parity */
494 /* For reference buf[5]=1 is odd parity */
495 /* For reference buf[5]=2 is even parity */
496 /* For reference buf[5]=3 is mark parity */
497 /* For reference buf[5]=4 is space parity */
499 if (tty->termios.c_cflag & CMSPAR) {
501 dev_dbg(&port->dev, "parity = mark\n");
504 dev_dbg(&port->dev, "parity = odd\n");
507 if (tty->termios.c_cflag & CMSPAR) {
509 dev_dbg(&port->dev, "parity = space\n");
512 dev_dbg(&port->dev, "parity = even\n");
517 dev_dbg(&port->dev, "parity = none\n");
520 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
521 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
523 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
525 /* change control lines if we are switching to or from B0 */
526 spin_lock_irqsave(&priv->lock, flags);
527 control = priv->line_control;
528 if (C_BAUD(tty) == B0)
529 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
530 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
531 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
532 if (control != priv->line_control) {
533 control = priv->line_control;
534 spin_unlock_irqrestore(&priv->lock, flags);
535 pl2303_set_control_lines(port, control);
537 spin_unlock_irqrestore(&priv->lock, flags);
541 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
542 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
544 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
546 if (C_CRTSCTS(tty)) {
547 if (spriv->type == HX)
548 pl2303_vendor_write(0x0, 0x61, serial);
550 pl2303_vendor_write(0x0, 0x41, serial);
552 pl2303_vendor_write(0x0, 0x0, serial);
558 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
560 struct pl2303_private *priv = usb_get_serial_port_data(port);
564 spin_lock_irqsave(&priv->lock, flags);
565 /* Change DTR and RTS */
567 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
569 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
570 control = priv->line_control;
571 spin_unlock_irqrestore(&priv->lock, flags);
572 pl2303_set_control_lines(port, control);
575 static void pl2303_close(struct usb_serial_port *port)
577 usb_serial_generic_close(port);
578 usb_kill_urb(port->interrupt_in_urb);
581 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
583 struct usb_serial *serial = port->serial;
584 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
587 if (spriv->type != HX) {
588 usb_clear_halt(serial->dev, port->write_urb->pipe);
589 usb_clear_halt(serial->dev, port->read_urb->pipe);
591 /* reset upstream data pipes */
592 pl2303_vendor_write(8, 0, serial);
593 pl2303_vendor_write(9, 0, serial);
598 pl2303_set_termios(tty, port, NULL);
600 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
602 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
603 " error %d\n", __func__, result);
607 result = usb_serial_generic_open(tty, port);
609 usb_kill_urb(port->interrupt_in_urb);
616 static int pl2303_tiocmset(struct tty_struct *tty,
617 unsigned int set, unsigned int clear)
619 struct usb_serial_port *port = tty->driver_data;
620 struct pl2303_private *priv = usb_get_serial_port_data(port);
625 spin_lock_irqsave(&priv->lock, flags);
627 priv->line_control |= CONTROL_RTS;
629 priv->line_control |= CONTROL_DTR;
630 if (clear & TIOCM_RTS)
631 priv->line_control &= ~CONTROL_RTS;
632 if (clear & TIOCM_DTR)
633 priv->line_control &= ~CONTROL_DTR;
634 control = priv->line_control;
635 spin_unlock_irqrestore(&priv->lock, flags);
637 ret = pl2303_set_control_lines(port, control);
639 return usb_translate_errors(ret);
644 static int pl2303_tiocmget(struct tty_struct *tty)
646 struct usb_serial_port *port = tty->driver_data;
647 struct pl2303_private *priv = usb_get_serial_port_data(port);
653 spin_lock_irqsave(&priv->lock, flags);
654 mcr = priv->line_control;
655 status = priv->line_status;
656 spin_unlock_irqrestore(&priv->lock, flags);
658 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
659 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
660 | ((status & UART_CTS) ? TIOCM_CTS : 0)
661 | ((status & UART_DSR) ? TIOCM_DSR : 0)
662 | ((status & UART_RING) ? TIOCM_RI : 0)
663 | ((status & UART_DCD) ? TIOCM_CD : 0);
665 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
670 static int pl2303_carrier_raised(struct usb_serial_port *port)
672 struct pl2303_private *priv = usb_get_serial_port_data(port);
673 if (priv->line_status & UART_DCD)
678 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
680 struct usb_serial_port *port = tty->driver_data;
681 struct pl2303_private *priv = usb_get_serial_port_data(port);
683 unsigned int prevstatus;
685 unsigned int changed;
687 spin_lock_irqsave(&priv->lock, flags);
688 prevstatus = priv->line_status;
689 spin_unlock_irqrestore(&priv->lock, flags);
692 interruptible_sleep_on(&port->port.delta_msr_wait);
693 /* see if a signal did it */
694 if (signal_pending(current))
697 if (port->serial->disconnected)
700 spin_lock_irqsave(&priv->lock, flags);
701 status = priv->line_status;
702 spin_unlock_irqrestore(&priv->lock, flags);
704 changed = prevstatus ^ status;
706 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
707 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
708 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
709 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
718 static int pl2303_ioctl(struct tty_struct *tty,
719 unsigned int cmd, unsigned long arg)
721 struct serial_struct ser;
722 struct usb_serial_port *port = tty->driver_data;
724 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
728 memset(&ser, 0, sizeof ser);
729 ser.type = PORT_16654;
730 ser.line = port->minor;
731 ser.port = port->port_number;
732 ser.baud_base = 460800;
734 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
739 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
745 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
747 struct usb_serial_port *port = tty->driver_data;
748 struct usb_serial *serial = port->serial;
752 if (break_state == 0)
756 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
757 state == BREAK_OFF ? "off" : "on");
759 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
760 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
763 dev_err(&port->dev, "error sending break = %d\n", result);
766 static void pl2303_update_line_status(struct usb_serial_port *port,
768 unsigned int actual_length)
771 struct pl2303_private *priv = usb_get_serial_port_data(port);
772 struct tty_struct *tty;
774 u8 status_idx = UART_STATE;
775 u8 length = UART_STATE + 1;
779 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
780 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
783 if (idv == SIEMENS_VENDOR_ID) {
784 if (idp == SIEMENS_PRODUCT_ID_X65 ||
785 idp == SIEMENS_PRODUCT_ID_SX1 ||
786 idp == SIEMENS_PRODUCT_ID_X75) {
793 if (actual_length < length)
796 /* Save off the uart status for others to look at */
797 spin_lock_irqsave(&priv->lock, flags);
798 prev_line_status = priv->line_status;
799 priv->line_status = data[status_idx];
800 spin_unlock_irqrestore(&priv->lock, flags);
801 if (priv->line_status & UART_BREAK_ERROR)
802 usb_serial_handle_break(port);
803 wake_up_interruptible(&port->port.delta_msr_wait);
805 tty = tty_port_tty_get(&port->port);
808 if ((priv->line_status ^ prev_line_status) & UART_DCD)
809 usb_serial_handle_dcd_change(port, tty,
810 priv->line_status & UART_DCD);
814 static void pl2303_read_int_callback(struct urb *urb)
816 struct usb_serial_port *port = urb->context;
817 unsigned char *data = urb->transfer_buffer;
818 unsigned int actual_length = urb->actual_length;
819 int status = urb->status;
829 /* this urb is terminated, clean up */
830 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
834 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
839 usb_serial_debug_data(&port->dev, __func__,
840 urb->actual_length, urb->transfer_buffer);
842 pl2303_update_line_status(port, data, actual_length);
845 retval = usb_submit_urb(urb, GFP_ATOMIC);
848 "%s - usb_submit_urb failed with result %d\n",
852 static void pl2303_process_read_urb(struct urb *urb)
854 struct usb_serial_port *port = urb->context;
855 struct pl2303_private *priv = usb_get_serial_port_data(port);
856 unsigned char *data = urb->transfer_buffer;
857 char tty_flag = TTY_NORMAL;
862 /* update line status */
863 spin_lock_irqsave(&priv->lock, flags);
864 line_status = priv->line_status;
865 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
866 spin_unlock_irqrestore(&priv->lock, flags);
867 wake_up_interruptible(&port->port.delta_msr_wait);
869 if (!urb->actual_length)
872 /* break takes precedence over parity, */
873 /* which takes precedence over framing errors */
874 if (line_status & UART_BREAK_ERROR)
875 tty_flag = TTY_BREAK;
876 else if (line_status & UART_PARITY_ERROR)
877 tty_flag = TTY_PARITY;
878 else if (line_status & UART_FRAME_ERROR)
879 tty_flag = TTY_FRAME;
881 if (tty_flag != TTY_NORMAL)
882 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
884 /* overrun is special, not associated with a char */
885 if (line_status & UART_OVERRUN_ERROR)
886 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
888 if (port->port.console && port->sysrq) {
889 for (i = 0; i < urb->actual_length; ++i)
890 if (!usb_serial_handle_sysrq_char(port, data[i]))
891 tty_insert_flip_char(&port->port, data[i],
894 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
898 tty_flip_buffer_push(&port->port);
901 /* All of the device info needed for the PL2303 SIO serial converter */
902 static struct usb_serial_driver pl2303_device = {
904 .owner = THIS_MODULE,
907 .id_table = id_table,
910 .bulk_out_size = 256,
912 .close = pl2303_close,
913 .dtr_rts = pl2303_dtr_rts,
914 .carrier_raised = pl2303_carrier_raised,
915 .ioctl = pl2303_ioctl,
916 .break_ctl = pl2303_break_ctl,
917 .set_termios = pl2303_set_termios,
918 .tiocmget = pl2303_tiocmget,
919 .tiocmset = pl2303_tiocmset,
920 .tiocmiwait = pl2303_tiocmiwait,
921 .process_read_urb = pl2303_process_read_urb,
922 .read_int_callback = pl2303_read_int_callback,
923 .attach = pl2303_startup,
924 .release = pl2303_release,
925 .port_probe = pl2303_port_probe,
926 .port_remove = pl2303_port_remove,
929 static struct usb_serial_driver * const serial_drivers[] = {
933 module_usb_serial_driver(serial_drivers, id_table);
935 MODULE_DESCRIPTION(DRIVER_DESC);
936 MODULE_LICENSE("GPL");