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 * Original driver for 2.2.x by anonymous
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License version
11 * 2 as published by the Free Software Foundation.
13 * See Documentation/usb/usb-serial.txt for more information on using this
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/init.h>
21 #include <linux/slab.h>
22 #include <linux/tty.h>
23 #include <linux/tty_driver.h>
24 #include <linux/tty_flip.h>
25 #include <linux/serial.h>
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/spinlock.h>
29 #include <linux/uaccess.h>
30 #include <linux/usb.h>
31 #include <linux/usb/serial.h>
37 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
41 #define PL2303_CLOSING_WAIT (30*HZ)
43 static const struct usb_device_id id_table[] = {
44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
51 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
52 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
54 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
55 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
56 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
57 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
58 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
59 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
60 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
61 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
62 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
63 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
64 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
65 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
66 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
67 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
68 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
69 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
70 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
71 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
72 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
74 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
75 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
76 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
77 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
78 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
79 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
80 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
81 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
82 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
83 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
84 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
85 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
86 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
87 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
88 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
89 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
90 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
91 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
92 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
93 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
94 { USB_DEVICE(WINCHIPHEAD_VENDOR_ID, WINCHIPHEAD_USBSER_PRODUCT_ID) },
95 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
96 { } /* Terminating entry */
99 MODULE_DEVICE_TABLE(usb, id_table);
101 static struct usb_driver pl2303_driver = {
103 .probe = usb_serial_probe,
104 .disconnect = usb_serial_disconnect,
105 .id_table = id_table,
106 .suspend = usb_serial_suspend,
107 .resume = usb_serial_resume,
109 .supports_autosuspend = 1,
112 #define SET_LINE_REQUEST_TYPE 0x21
113 #define SET_LINE_REQUEST 0x20
115 #define SET_CONTROL_REQUEST_TYPE 0x21
116 #define SET_CONTROL_REQUEST 0x22
117 #define CONTROL_DTR 0x01
118 #define CONTROL_RTS 0x02
120 #define BREAK_REQUEST_TYPE 0x21
121 #define BREAK_REQUEST 0x23
122 #define BREAK_ON 0xffff
123 #define BREAK_OFF 0x0000
125 #define GET_LINE_REQUEST_TYPE 0xa1
126 #define GET_LINE_REQUEST 0x21
128 #define VENDOR_WRITE_REQUEST_TYPE 0x40
129 #define VENDOR_WRITE_REQUEST 0x01
131 #define VENDOR_READ_REQUEST_TYPE 0xc0
132 #define VENDOR_READ_REQUEST 0x01
134 #define UART_STATE 0x08
135 #define UART_STATE_TRANSIENT_MASK 0x74
136 #define UART_DCD 0x01
137 #define UART_DSR 0x02
138 #define UART_BREAK_ERROR 0x04
139 #define UART_RING 0x08
140 #define UART_FRAME_ERROR 0x10
141 #define UART_PARITY_ERROR 0x20
142 #define UART_OVERRUN_ERROR 0x40
143 #define UART_CTS 0x80
147 type_0, /* don't know the difference between type 0 and */
148 type_1, /* type 1, until someone from prolific tells us... */
149 HX, /* HX version of the pl2303 chip */
152 struct pl2303_private {
154 wait_queue_head_t delta_msr_wait;
157 enum pl2303_type type;
160 static int pl2303_vendor_read(__u16 value, __u16 index,
161 struct usb_serial *serial, unsigned char *buf)
163 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
164 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
165 value, index, buf, 1, 100);
166 dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE,
167 VENDOR_READ_REQUEST, value, index, res, buf[0]);
171 static int pl2303_vendor_write(__u16 value, __u16 index,
172 struct usb_serial *serial)
174 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
175 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
176 value, index, NULL, 0, 100);
177 dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE,
178 VENDOR_WRITE_REQUEST, value, index, res);
182 static int pl2303_startup(struct usb_serial *serial)
184 struct pl2303_private *priv;
185 enum pl2303_type type = type_0;
189 buf = kmalloc(10, GFP_KERNEL);
193 if (serial->dev->descriptor.bDeviceClass == 0x02)
195 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
197 else if (serial->dev->descriptor.bDeviceClass == 0x00)
199 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
201 dbg("device type: %d", type);
203 for (i = 0; i < serial->num_ports; ++i) {
204 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
207 spin_lock_init(&priv->lock);
208 init_waitqueue_head(&priv->delta_msr_wait);
210 usb_set_serial_port_data(serial->port[i], priv);
213 pl2303_vendor_read(0x8484, 0, serial, buf);
214 pl2303_vendor_write(0x0404, 0, serial);
215 pl2303_vendor_read(0x8484, 0, serial, buf);
216 pl2303_vendor_read(0x8383, 0, serial, buf);
217 pl2303_vendor_read(0x8484, 0, serial, buf);
218 pl2303_vendor_write(0x0404, 1, serial);
219 pl2303_vendor_read(0x8484, 0, serial, buf);
220 pl2303_vendor_read(0x8383, 0, serial, buf);
221 pl2303_vendor_write(0, 1, serial);
222 pl2303_vendor_write(1, 0, serial);
224 pl2303_vendor_write(2, 0x44, serial);
226 pl2303_vendor_write(2, 0x24, serial);
233 for (--i; i >= 0; --i) {
234 priv = usb_get_serial_port_data(serial->port[i]);
236 usb_set_serial_port_data(serial->port[i], NULL);
241 static int set_control_lines(struct usb_device *dev, u8 value)
245 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
246 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
247 value, 0, NULL, 0, 100);
248 dbg("%s - value = %d, retval = %d", __func__, value, retval);
252 static void pl2303_set_termios(struct tty_struct *tty,
253 struct usb_serial_port *port, struct ktermios *old_termios)
255 struct usb_serial *serial = port->serial;
256 struct pl2303_private *priv = usb_get_serial_port_data(port);
263 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
264 4800, 7200, 9600, 14400, 19200, 28800, 38400,
265 57600, 115200, 230400, 460800, 614400,
266 921600, 1228800, 2457600, 3000000, 6000000 };
267 int baud_floor, baud_ceil;
270 dbg("%s - port %d", __func__, port->number);
272 /* The PL2303 is reported to lose bytes if you change
273 serial settings even to the same values as before. Thus
274 we actually need to filter in this specific case */
276 if (!tty_termios_hw_change(tty->termios, old_termios))
279 cflag = tty->termios->c_cflag;
281 buf = kzalloc(7, GFP_KERNEL);
283 dev_err(&port->dev, "%s - out of memory.\n", __func__);
284 /* Report back no change occurred */
285 *tty->termios = *old_termios;
289 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
290 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
292 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
293 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
296 switch (cflag & CSIZE) {
311 dbg("%s - data bits = %d", __func__, buf[6]);
314 /* For reference buf[0]:buf[3] baud rate value */
315 /* NOTE: Only the values defined in baud_sup are supported !
316 * => if unsupported values are set, the PL2303 seems to use
317 * 9600 baud (at least my PL2303X always does)
319 baud = tty_get_baud_rate(tty);
320 dbg("%s - baud requested = %d", __func__, baud);
322 /* Set baudrate to nearest supported value */
323 for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
324 if (baud_sup[k] / baud) {
325 baud_ceil = baud_sup[k];
329 baud_floor = baud_sup[k-1];
330 if ((baud_ceil % baud)
331 > (baud % baud_floor))
339 if (baud > 1228800) {
340 /* type_0, type_1 only support up to 1228800 baud */
341 if (priv->type != HX)
343 else if (baud > 6000000)
346 dbg("%s - baud set = %d", __func__, baud);
347 if (baud <= 115200) {
348 buf[0] = baud & 0xff;
349 buf[1] = (baud >> 8) & 0xff;
350 buf[2] = (baud >> 16) & 0xff;
351 buf[3] = (baud >> 24) & 0xff;
353 /* apparently the formula for higher speeds is:
354 * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
356 unsigned tmp = 12*1000*1000*32 / baud;
359 buf[1] = (tmp >= 256);
368 /* For reference buf[4]=0 is 1 stop bits */
369 /* For reference buf[4]=1 is 1.5 stop bits */
370 /* For reference buf[4]=2 is 2 stop bits */
371 if (cflag & CSTOPB) {
372 /* NOTE: Comply with "real" UARTs / RS232:
373 * use 1.5 instead of 2 stop bits with 5 data bits
375 if ((cflag & CSIZE) == CS5) {
377 dbg("%s - stop bits = 1.5", __func__);
380 dbg("%s - stop bits = 2", __func__);
384 dbg("%s - stop bits = 1", __func__);
387 if (cflag & PARENB) {
388 /* For reference buf[5]=0 is none parity */
389 /* For reference buf[5]=1 is odd parity */
390 /* For reference buf[5]=2 is even parity */
391 /* For reference buf[5]=3 is mark parity */
392 /* For reference buf[5]=4 is space parity */
393 if (cflag & PARODD) {
394 if (cflag & CMSPAR) {
396 dbg("%s - parity = mark", __func__);
399 dbg("%s - parity = odd", __func__);
402 if (cflag & CMSPAR) {
404 dbg("%s - parity = space", __func__);
407 dbg("%s - parity = even", __func__);
412 dbg("%s - parity = none", __func__);
415 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
416 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
418 dbg("0x21:0x20:0:0 %d", i);
420 /* change control lines if we are switching to or from B0 */
421 spin_lock_irqsave(&priv->lock, flags);
422 control = priv->line_control;
423 if ((cflag & CBAUD) == B0)
424 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
426 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
427 if (control != priv->line_control) {
428 control = priv->line_control;
429 spin_unlock_irqrestore(&priv->lock, flags);
430 set_control_lines(serial->dev, control);
432 spin_unlock_irqrestore(&priv->lock, flags);
435 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
437 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
438 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
440 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
441 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
443 if (cflag & CRTSCTS) {
444 if (priv->type == HX)
445 pl2303_vendor_write(0x0, 0x61, serial);
447 pl2303_vendor_write(0x0, 0x41, serial);
449 pl2303_vendor_write(0x0, 0x0, serial);
452 /* Save resulting baud rate */
454 tty_encode_baud_rate(tty, baud, baud);
459 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
461 struct pl2303_private *priv = usb_get_serial_port_data(port);
465 spin_lock_irqsave(&priv->lock, flags);
466 /* Change DTR and RTS */
468 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
470 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
471 control = priv->line_control;
472 spin_unlock_irqrestore(&priv->lock, flags);
473 set_control_lines(port->serial->dev, control);
476 static void pl2303_close(struct usb_serial_port *port)
478 dbg("%s - port %d", __func__, port->number);
480 usb_serial_generic_close(port);
481 usb_kill_urb(port->interrupt_in_urb);
484 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
486 struct ktermios tmp_termios;
487 struct usb_serial *serial = port->serial;
488 struct pl2303_private *priv = usb_get_serial_port_data(port);
491 dbg("%s - port %d", __func__, port->number);
493 if (priv->type != HX) {
494 usb_clear_halt(serial->dev, port->write_urb->pipe);
495 usb_clear_halt(serial->dev, port->read_urb->pipe);
497 /* reset upstream data pipes */
498 pl2303_vendor_write(8, 0, serial);
499 pl2303_vendor_write(9, 0, serial);
504 pl2303_set_termios(tty, port, &tmp_termios);
506 dbg("%s - submitting read urb", __func__);
507 result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
513 dbg("%s - submitting interrupt urb", __func__);
514 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
516 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
517 " error %d\n", __func__, result);
521 port->port.drain_delay = 256;
525 static int pl2303_tiocmset(struct tty_struct *tty,
526 unsigned int set, unsigned int clear)
528 struct usb_serial_port *port = tty->driver_data;
529 struct pl2303_private *priv = usb_get_serial_port_data(port);
533 if (!usb_get_intfdata(port->serial->interface))
536 spin_lock_irqsave(&priv->lock, flags);
538 priv->line_control |= CONTROL_RTS;
540 priv->line_control |= CONTROL_DTR;
541 if (clear & TIOCM_RTS)
542 priv->line_control &= ~CONTROL_RTS;
543 if (clear & TIOCM_DTR)
544 priv->line_control &= ~CONTROL_DTR;
545 control = priv->line_control;
546 spin_unlock_irqrestore(&priv->lock, flags);
548 return set_control_lines(port->serial->dev, control);
551 static int pl2303_tiocmget(struct tty_struct *tty)
553 struct usb_serial_port *port = tty->driver_data;
554 struct pl2303_private *priv = usb_get_serial_port_data(port);
560 dbg("%s (%d)", __func__, port->number);
562 if (!usb_get_intfdata(port->serial->interface))
565 spin_lock_irqsave(&priv->lock, flags);
566 mcr = priv->line_control;
567 status = priv->line_status;
568 spin_unlock_irqrestore(&priv->lock, flags);
570 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
571 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
572 | ((status & UART_CTS) ? TIOCM_CTS : 0)
573 | ((status & UART_DSR) ? TIOCM_DSR : 0)
574 | ((status & UART_RING) ? TIOCM_RI : 0)
575 | ((status & UART_DCD) ? TIOCM_CD : 0);
577 dbg("%s - result = %x", __func__, result);
582 static int pl2303_carrier_raised(struct usb_serial_port *port)
584 struct pl2303_private *priv = usb_get_serial_port_data(port);
585 if (priv->line_status & UART_DCD)
590 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
592 struct pl2303_private *priv = usb_get_serial_port_data(port);
594 unsigned int prevstatus;
596 unsigned int changed;
598 spin_lock_irqsave(&priv->lock, flags);
599 prevstatus = priv->line_status;
600 spin_unlock_irqrestore(&priv->lock, flags);
603 interruptible_sleep_on(&priv->delta_msr_wait);
604 /* see if a signal did it */
605 if (signal_pending(current))
608 spin_lock_irqsave(&priv->lock, flags);
609 status = priv->line_status;
610 spin_unlock_irqrestore(&priv->lock, flags);
612 changed = prevstatus ^ status;
614 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
615 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
616 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
617 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
626 static int pl2303_ioctl(struct tty_struct *tty,
627 unsigned int cmd, unsigned long arg)
629 struct serial_struct ser;
630 struct usb_serial_port *port = tty->driver_data;
631 dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
635 memset(&ser, 0, sizeof ser);
636 ser.type = PORT_16654;
637 ser.line = port->serial->minor;
638 ser.port = port->number;
639 ser.baud_base = 460800;
641 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
647 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
648 return wait_modem_info(port, arg);
650 dbg("%s not supported = 0x%04x", __func__, cmd);
656 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
658 struct usb_serial_port *port = tty->driver_data;
659 struct usb_serial *serial = port->serial;
663 dbg("%s - port %d", __func__, port->number);
665 if (break_state == 0)
669 dbg("%s - turning break %s", __func__,
670 state == BREAK_OFF ? "off" : "on");
672 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
673 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
676 dbg("%s - error sending break = %d", __func__, result);
679 static void pl2303_release(struct usb_serial *serial)
682 struct pl2303_private *priv;
686 for (i = 0; i < serial->num_ports; ++i) {
687 priv = usb_get_serial_port_data(serial->port[i]);
692 static void pl2303_update_line_status(struct usb_serial_port *port,
694 unsigned int actual_length)
697 struct pl2303_private *priv = usb_get_serial_port_data(port);
698 struct tty_struct *tty;
700 u8 status_idx = UART_STATE;
701 u8 length = UART_STATE + 1;
705 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
706 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
709 if (idv == SIEMENS_VENDOR_ID) {
710 if (idp == SIEMENS_PRODUCT_ID_X65 ||
711 idp == SIEMENS_PRODUCT_ID_SX1 ||
712 idp == SIEMENS_PRODUCT_ID_X75) {
719 if (actual_length < length)
722 /* Save off the uart status for others to look at */
723 spin_lock_irqsave(&priv->lock, flags);
724 prev_line_status = priv->line_status;
725 priv->line_status = data[status_idx];
726 spin_unlock_irqrestore(&priv->lock, flags);
727 if (priv->line_status & UART_BREAK_ERROR)
728 usb_serial_handle_break(port);
729 wake_up_interruptible(&priv->delta_msr_wait);
731 tty = tty_port_tty_get(&port->port);
734 if ((priv->line_status ^ prev_line_status) & UART_DCD)
735 usb_serial_handle_dcd_change(port, tty,
736 priv->line_status & UART_DCD);
740 static void pl2303_read_int_callback(struct urb *urb)
742 struct usb_serial_port *port = urb->context;
743 unsigned char *data = urb->transfer_buffer;
744 unsigned int actual_length = urb->actual_length;
745 int status = urb->status;
748 dbg("%s (%d)", __func__, port->number);
757 /* this urb is terminated, clean up */
758 dbg("%s - urb shutting down with status: %d", __func__,
762 dbg("%s - nonzero urb status received: %d", __func__,
767 usb_serial_debug_data(debug, &port->dev, __func__,
768 urb->actual_length, urb->transfer_buffer);
770 pl2303_update_line_status(port, data, actual_length);
773 retval = usb_submit_urb(urb, GFP_ATOMIC);
775 dev_err(&urb->dev->dev,
776 "%s - usb_submit_urb failed with result %d\n",
780 static void pl2303_process_read_urb(struct urb *urb)
782 struct usb_serial_port *port = urb->context;
783 struct pl2303_private *priv = usb_get_serial_port_data(port);
784 struct tty_struct *tty;
785 unsigned char *data = urb->transfer_buffer;
786 char tty_flag = TTY_NORMAL;
791 /* update line status */
792 spin_lock_irqsave(&priv->lock, flags);
793 line_status = priv->line_status;
794 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
795 spin_unlock_irqrestore(&priv->lock, flags);
796 wake_up_interruptible(&priv->delta_msr_wait);
798 if (!urb->actual_length)
801 tty = tty_port_tty_get(&port->port);
805 /* break takes precedence over parity, */
806 /* which takes precedence over framing errors */
807 if (line_status & UART_BREAK_ERROR)
808 tty_flag = TTY_BREAK;
809 else if (line_status & UART_PARITY_ERROR)
810 tty_flag = TTY_PARITY;
811 else if (line_status & UART_FRAME_ERROR)
812 tty_flag = TTY_FRAME;
813 dbg("%s - tty_flag = %d", __func__, tty_flag);
815 /* overrun is special, not associated with a char */
816 if (line_status & UART_OVERRUN_ERROR)
817 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
819 if (port->port.console && port->sysrq) {
820 for (i = 0; i < urb->actual_length; ++i)
821 if (!usb_serial_handle_sysrq_char(port, data[i]))
822 tty_insert_flip_char(tty, data[i], tty_flag);
824 tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
828 tty_flip_buffer_push(tty);
832 /* All of the device info needed for the PL2303 SIO serial converter */
833 static struct usb_serial_driver pl2303_device = {
835 .owner = THIS_MODULE,
838 .id_table = id_table,
839 .usb_driver = &pl2303_driver,
842 .bulk_out_size = 256,
844 .close = pl2303_close,
845 .dtr_rts = pl2303_dtr_rts,
846 .carrier_raised = pl2303_carrier_raised,
847 .ioctl = pl2303_ioctl,
848 .break_ctl = pl2303_break_ctl,
849 .set_termios = pl2303_set_termios,
850 .tiocmget = pl2303_tiocmget,
851 .tiocmset = pl2303_tiocmset,
852 .process_read_urb = pl2303_process_read_urb,
853 .read_int_callback = pl2303_read_int_callback,
854 .attach = pl2303_startup,
855 .release = pl2303_release,
858 static int __init pl2303_init(void)
862 retval = usb_serial_register(&pl2303_device);
864 goto failed_usb_serial_register;
865 retval = usb_register(&pl2303_driver);
867 goto failed_usb_register;
868 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
871 usb_serial_deregister(&pl2303_device);
872 failed_usb_serial_register:
876 static void __exit pl2303_exit(void)
878 usb_deregister(&pl2303_driver);
879 usb_serial_deregister(&pl2303_device);
882 module_init(pl2303_init);
883 module_exit(pl2303_exit);
885 MODULE_DESCRIPTION(DRIVER_DESC);
886 MODULE_LICENSE("GPL");
888 module_param(debug, bool, S_IRUGO | S_IWUSR);
889 MODULE_PARM_DESC(debug, "Debug enabled or not");