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(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) },
55 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
56 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
57 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
58 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
59 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
60 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
61 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
62 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
63 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
64 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
65 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
66 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
67 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
68 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
69 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_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(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) },
90 { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) },
91 { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) },
92 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
93 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
94 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
95 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
96 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
97 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
98 { } /* Terminating entry */
101 MODULE_DEVICE_TABLE(usb, id_table);
103 static struct usb_driver pl2303_driver = {
105 .probe = usb_serial_probe,
106 .disconnect = usb_serial_disconnect,
107 .id_table = id_table,
108 .suspend = usb_serial_suspend,
109 .resume = usb_serial_resume,
111 .supports_autosuspend = 1,
114 #define SET_LINE_REQUEST_TYPE 0x21
115 #define SET_LINE_REQUEST 0x20
117 #define SET_CONTROL_REQUEST_TYPE 0x21
118 #define SET_CONTROL_REQUEST 0x22
119 #define CONTROL_DTR 0x01
120 #define CONTROL_RTS 0x02
122 #define BREAK_REQUEST_TYPE 0x21
123 #define BREAK_REQUEST 0x23
124 #define BREAK_ON 0xffff
125 #define BREAK_OFF 0x0000
127 #define GET_LINE_REQUEST_TYPE 0xa1
128 #define GET_LINE_REQUEST 0x21
130 #define VENDOR_WRITE_REQUEST_TYPE 0x40
131 #define VENDOR_WRITE_REQUEST 0x01
133 #define VENDOR_READ_REQUEST_TYPE 0xc0
134 #define VENDOR_READ_REQUEST 0x01
136 #define UART_STATE 0x08
137 #define UART_STATE_TRANSIENT_MASK 0x74
138 #define UART_DCD 0x01
139 #define UART_DSR 0x02
140 #define UART_BREAK_ERROR 0x04
141 #define UART_RING 0x08
142 #define UART_FRAME_ERROR 0x10
143 #define UART_PARITY_ERROR 0x20
144 #define UART_OVERRUN_ERROR 0x40
145 #define UART_CTS 0x80
149 type_0, /* don't know the difference between type 0 and */
150 type_1, /* type 1, until someone from prolific tells us... */
151 HX, /* HX version of the pl2303 chip */
154 struct pl2303_private {
158 enum pl2303_type type;
163 static int pl2303_vendor_read(__u16 value, __u16 index,
164 struct usb_serial *serial, unsigned char *buf)
166 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
167 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
168 value, index, buf, 1, 100);
169 dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE,
170 VENDOR_READ_REQUEST, value, index, res, buf[0]);
174 static int pl2303_vendor_write(__u16 value, __u16 index,
175 struct usb_serial *serial)
177 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
178 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
179 value, index, NULL, 0, 100);
180 dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE,
181 VENDOR_WRITE_REQUEST, value, index, res);
185 static int pl2303_startup(struct usb_serial *serial)
187 struct pl2303_private *priv;
188 unsigned char num_ports = serial->num_ports;
189 enum pl2303_type type = type_0;
193 if (serial->num_bulk_in < num_ports ||
194 serial->num_bulk_out < num_ports ||
195 serial->num_interrupt_in < num_ports) {
196 dev_err(&serial->interface->dev, "missing endpoints\n");
200 buf = kmalloc(10, GFP_KERNEL);
204 if (serial->dev->descriptor.bDeviceClass == 0x02)
206 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
208 else if (serial->dev->descriptor.bDeviceClass == 0x00)
210 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
212 dbg("device type: %d", type);
214 for (i = 0; i < serial->num_ports; ++i) {
215 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
218 spin_lock_init(&priv->lock);
220 usb_set_serial_port_data(serial->port[i], priv);
223 pl2303_vendor_read(0x8484, 0, serial, buf);
224 pl2303_vendor_write(0x0404, 0, serial);
225 pl2303_vendor_read(0x8484, 0, serial, buf);
226 pl2303_vendor_read(0x8383, 0, serial, buf);
227 pl2303_vendor_read(0x8484, 0, serial, buf);
228 pl2303_vendor_write(0x0404, 1, serial);
229 pl2303_vendor_read(0x8484, 0, serial, buf);
230 pl2303_vendor_read(0x8383, 0, serial, buf);
231 pl2303_vendor_write(0, 1, serial);
232 pl2303_vendor_write(1, 0, serial);
234 pl2303_vendor_write(2, 0x44, serial);
236 pl2303_vendor_write(2, 0x24, serial);
243 for (--i; i >= 0; --i) {
244 priv = usb_get_serial_port_data(serial->port[i]);
246 usb_set_serial_port_data(serial->port[i], NULL);
251 static int set_control_lines(struct usb_device *dev, u8 value)
255 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
256 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
257 value, 0, NULL, 0, 100);
258 dbg("%s - value = %d, retval = %d", __func__, value, retval);
262 static void pl2303_set_termios(struct tty_struct *tty,
263 struct usb_serial_port *port, struct ktermios *old_termios)
265 struct usb_serial *serial = port->serial;
266 struct pl2303_private *priv = usb_get_serial_port_data(port);
273 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
274 4800, 7200, 9600, 14400, 19200, 28800, 38400,
275 57600, 115200, 230400, 460800, 614400,
276 921600, 1228800, 2457600, 3000000, 6000000 };
277 int baud_floor, baud_ceil;
280 dbg("%s - port %d", __func__, port->number);
282 if (old_termios && !tty_termios_hw_change(tty->termios, old_termios))
285 cflag = tty->termios->c_cflag;
287 buf = kzalloc(7, GFP_KERNEL);
289 dev_err(&port->dev, "%s - out of memory.\n", __func__);
290 /* Report back no change occurred */
292 *tty->termios = *old_termios;
296 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
297 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
299 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
300 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
302 switch (C_CSIZE(tty)) {
316 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
318 /* For reference buf[0]:buf[3] baud rate value */
319 /* NOTE: Only the values defined in baud_sup are supported !
320 * => if unsupported values are set, the PL2303 seems to use
321 * 9600 baud (at least my PL2303X always does)
323 baud = tty_get_baud_rate(tty);
324 dbg("%s - baud requested = %d", __func__, baud);
326 /* Set baudrate to nearest supported value */
327 for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
328 if (baud_sup[k] / baud) {
329 baud_ceil = baud_sup[k];
333 baud_floor = baud_sup[k-1];
334 if ((baud_ceil % baud)
335 > (baud % baud_floor))
343 if (baud > 1228800) {
344 /* type_0, type_1 only support up to 1228800 baud */
345 if (priv->type != HX)
347 else if (baud > 6000000)
350 dbg("%s - baud set = %d", __func__, baud);
351 if (baud <= 115200) {
352 buf[0] = baud & 0xff;
353 buf[1] = (baud >> 8) & 0xff;
354 buf[2] = (baud >> 16) & 0xff;
355 buf[3] = (baud >> 24) & 0xff;
357 /* apparently the formula for higher speeds is:
358 * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
360 unsigned tmp = 12*1000*1000*32 / baud;
363 buf[1] = (tmp >= 256);
372 /* For reference buf[4]=0 is 1 stop bits */
373 /* For reference buf[4]=1 is 1.5 stop bits */
374 /* For reference buf[4]=2 is 2 stop bits */
375 if (cflag & CSTOPB) {
376 /* NOTE: Comply with "real" UARTs / RS232:
377 * use 1.5 instead of 2 stop bits with 5 data bits
379 if ((cflag & CSIZE) == CS5) {
381 dbg("%s - stop bits = 1.5", __func__);
384 dbg("%s - stop bits = 2", __func__);
388 dbg("%s - stop bits = 1", __func__);
391 if (cflag & PARENB) {
392 /* For reference buf[5]=0 is none parity */
393 /* For reference buf[5]=1 is odd parity */
394 /* For reference buf[5]=2 is even parity */
395 /* For reference buf[5]=3 is mark parity */
396 /* For reference buf[5]=4 is space parity */
397 if (cflag & PARODD) {
398 if (cflag & CMSPAR) {
400 dbg("%s - parity = mark", __func__);
403 dbg("%s - parity = odd", __func__);
406 if (cflag & CMSPAR) {
408 dbg("%s - parity = space", __func__);
411 dbg("%s - parity = even", __func__);
416 dbg("%s - parity = none", __func__);
420 * Some PL2303 are known to lose bytes if you change serial settings
421 * even to the same values as before. Thus we actually need to filter
422 * in this specific case.
424 * Note that the tty_termios_hw_change check above is not sufficient
425 * as a previously requested baud rate may differ from the one
426 * actually used (and stored in old_termios).
428 * NOTE: No additional locking needed for line_settings as it is
429 * only used in set_termios, which is serialised against itself.
431 if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
432 i = usb_control_msg(serial->dev,
433 usb_sndctrlpipe(serial->dev, 0),
434 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
437 dbg("0x21:0x20:0:0 %d", i);
440 memcpy(priv->line_settings, buf, 7);
443 /* change control lines if we are switching to or from B0 */
444 spin_lock_irqsave(&priv->lock, flags);
445 control = priv->line_control;
446 if ((cflag & CBAUD) == B0)
447 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
448 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
449 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
450 if (control != priv->line_control) {
451 control = priv->line_control;
452 spin_unlock_irqrestore(&priv->lock, flags);
453 set_control_lines(serial->dev, control);
455 spin_unlock_irqrestore(&priv->lock, flags);
458 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
460 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
461 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
463 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
464 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
466 if (cflag & CRTSCTS) {
467 if (priv->type == HX)
468 pl2303_vendor_write(0x0, 0x61, serial);
470 pl2303_vendor_write(0x0, 0x41, serial);
472 pl2303_vendor_write(0x0, 0x0, serial);
475 /* Save resulting baud rate */
477 tty_encode_baud_rate(tty, baud, baud);
482 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
484 struct pl2303_private *priv = usb_get_serial_port_data(port);
488 spin_lock_irqsave(&priv->lock, flags);
489 /* Change DTR and RTS */
491 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
493 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
494 control = priv->line_control;
495 spin_unlock_irqrestore(&priv->lock, flags);
496 set_control_lines(port->serial->dev, control);
499 static void pl2303_close(struct usb_serial_port *port)
501 dbg("%s - port %d", __func__, port->number);
503 usb_serial_generic_close(port);
504 usb_kill_urb(port->interrupt_in_urb);
507 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
509 struct usb_serial *serial = port->serial;
510 struct pl2303_private *priv = usb_get_serial_port_data(port);
513 dbg("%s - port %d", __func__, port->number);
515 if (priv->type != HX) {
516 usb_clear_halt(serial->dev, port->write_urb->pipe);
517 usb_clear_halt(serial->dev, port->read_urb->pipe);
519 /* reset upstream data pipes */
520 pl2303_vendor_write(8, 0, serial);
521 pl2303_vendor_write(9, 0, serial);
526 pl2303_set_termios(tty, port, NULL);
528 dbg("%s - submitting read urb", __func__);
529 result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
535 dbg("%s - submitting interrupt urb", __func__);
536 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
538 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
539 " error %d\n", __func__, result);
543 port->port.drain_delay = 256;
547 static int pl2303_tiocmset(struct tty_struct *tty,
548 unsigned int set, unsigned int clear)
550 struct usb_serial_port *port = tty->driver_data;
551 struct pl2303_private *priv = usb_get_serial_port_data(port);
555 if (!usb_get_intfdata(port->serial->interface))
558 spin_lock_irqsave(&priv->lock, flags);
560 priv->line_control |= CONTROL_RTS;
562 priv->line_control |= CONTROL_DTR;
563 if (clear & TIOCM_RTS)
564 priv->line_control &= ~CONTROL_RTS;
565 if (clear & TIOCM_DTR)
566 priv->line_control &= ~CONTROL_DTR;
567 control = priv->line_control;
568 spin_unlock_irqrestore(&priv->lock, flags);
570 return set_control_lines(port->serial->dev, control);
573 static int pl2303_tiocmget(struct tty_struct *tty)
575 struct usb_serial_port *port = tty->driver_data;
576 struct pl2303_private *priv = usb_get_serial_port_data(port);
582 dbg("%s (%d)", __func__, port->number);
584 if (!usb_get_intfdata(port->serial->interface))
587 spin_lock_irqsave(&priv->lock, flags);
588 mcr = priv->line_control;
589 status = priv->line_status;
590 spin_unlock_irqrestore(&priv->lock, flags);
592 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
593 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
594 | ((status & UART_CTS) ? TIOCM_CTS : 0)
595 | ((status & UART_DSR) ? TIOCM_DSR : 0)
596 | ((status & UART_RING) ? TIOCM_RI : 0)
597 | ((status & UART_DCD) ? TIOCM_CD : 0);
599 dbg("%s - result = %x", __func__, result);
604 static int pl2303_carrier_raised(struct usb_serial_port *port)
606 struct pl2303_private *priv = usb_get_serial_port_data(port);
607 if (priv->line_status & UART_DCD)
612 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
614 struct pl2303_private *priv = usb_get_serial_port_data(port);
616 unsigned int prevstatus;
618 unsigned int changed;
620 spin_lock_irqsave(&priv->lock, flags);
621 prevstatus = priv->line_status;
622 spin_unlock_irqrestore(&priv->lock, flags);
625 interruptible_sleep_on(&port->delta_msr_wait);
626 /* see if a signal did it */
627 if (signal_pending(current))
630 if (port->serial->disconnected)
633 spin_lock_irqsave(&priv->lock, flags);
634 status = priv->line_status;
635 spin_unlock_irqrestore(&priv->lock, flags);
637 changed = prevstatus ^ status;
639 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
640 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
641 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
642 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
651 static int pl2303_ioctl(struct tty_struct *tty,
652 unsigned int cmd, unsigned long arg)
654 struct serial_struct ser;
655 struct usb_serial_port *port = tty->driver_data;
656 dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
660 memset(&ser, 0, sizeof ser);
661 ser.type = PORT_16654;
662 ser.line = port->serial->minor;
663 ser.port = port->number;
664 ser.baud_base = 460800;
666 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
672 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
673 return wait_modem_info(port, arg);
675 dbg("%s not supported = 0x%04x", __func__, cmd);
681 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
683 struct usb_serial_port *port = tty->driver_data;
684 struct usb_serial *serial = port->serial;
688 dbg("%s - port %d", __func__, port->number);
690 if (break_state == 0)
694 dbg("%s - turning break %s", __func__,
695 state == BREAK_OFF ? "off" : "on");
697 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
698 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
701 dbg("%s - error sending break = %d", __func__, result);
704 static void pl2303_release(struct usb_serial *serial)
707 struct pl2303_private *priv;
711 for (i = 0; i < serial->num_ports; ++i) {
712 priv = usb_get_serial_port_data(serial->port[i]);
717 static void pl2303_update_line_status(struct usb_serial_port *port,
719 unsigned int actual_length)
722 struct pl2303_private *priv = usb_get_serial_port_data(port);
723 struct tty_struct *tty;
725 u8 status_idx = UART_STATE;
726 u8 length = UART_STATE + 1;
730 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
731 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
734 if (idv == SIEMENS_VENDOR_ID) {
735 if (idp == SIEMENS_PRODUCT_ID_X65 ||
736 idp == SIEMENS_PRODUCT_ID_SX1 ||
737 idp == SIEMENS_PRODUCT_ID_X75) {
744 if (actual_length < length)
747 /* Save off the uart status for others to look at */
748 spin_lock_irqsave(&priv->lock, flags);
749 prev_line_status = priv->line_status;
750 priv->line_status = data[status_idx];
751 spin_unlock_irqrestore(&priv->lock, flags);
752 if (priv->line_status & UART_BREAK_ERROR)
753 usb_serial_handle_break(port);
754 wake_up_interruptible(&port->delta_msr_wait);
756 tty = tty_port_tty_get(&port->port);
759 if ((priv->line_status ^ prev_line_status) & UART_DCD)
760 usb_serial_handle_dcd_change(port, tty,
761 priv->line_status & UART_DCD);
765 static void pl2303_read_int_callback(struct urb *urb)
767 struct usb_serial_port *port = urb->context;
768 unsigned char *data = urb->transfer_buffer;
769 unsigned int actual_length = urb->actual_length;
770 int status = urb->status;
773 dbg("%s (%d)", __func__, port->number);
782 /* this urb is terminated, clean up */
783 dbg("%s - urb shutting down with status: %d", __func__,
787 dbg("%s - nonzero urb status received: %d", __func__,
792 usb_serial_debug_data(debug, &port->dev, __func__,
793 urb->actual_length, urb->transfer_buffer);
795 pl2303_update_line_status(port, data, actual_length);
798 retval = usb_submit_urb(urb, GFP_ATOMIC);
800 dev_err(&urb->dev->dev,
801 "%s - usb_submit_urb failed with result %d\n",
805 static void pl2303_process_read_urb(struct urb *urb)
807 struct usb_serial_port *port = urb->context;
808 struct pl2303_private *priv = usb_get_serial_port_data(port);
809 struct tty_struct *tty;
810 unsigned char *data = urb->transfer_buffer;
811 char tty_flag = TTY_NORMAL;
816 /* update line status */
817 spin_lock_irqsave(&priv->lock, flags);
818 line_status = priv->line_status;
819 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
820 spin_unlock_irqrestore(&priv->lock, flags);
821 wake_up_interruptible(&port->delta_msr_wait);
823 if (!urb->actual_length)
826 tty = tty_port_tty_get(&port->port);
830 /* break takes precedence over parity, */
831 /* which takes precedence over framing errors */
832 if (line_status & UART_BREAK_ERROR)
833 tty_flag = TTY_BREAK;
834 else if (line_status & UART_PARITY_ERROR)
835 tty_flag = TTY_PARITY;
836 else if (line_status & UART_FRAME_ERROR)
837 tty_flag = TTY_FRAME;
838 dbg("%s - tty_flag = %d", __func__, tty_flag);
840 /* overrun is special, not associated with a char */
841 if (line_status & UART_OVERRUN_ERROR)
842 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
844 if (port->port.console && port->sysrq) {
845 for (i = 0; i < urb->actual_length; ++i)
846 if (!usb_serial_handle_sysrq_char(port, data[i]))
847 tty_insert_flip_char(tty, data[i], tty_flag);
849 tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
853 tty_flip_buffer_push(tty);
857 /* All of the device info needed for the PL2303 SIO serial converter */
858 static struct usb_serial_driver pl2303_device = {
860 .owner = THIS_MODULE,
863 .id_table = id_table,
864 .usb_driver = &pl2303_driver,
867 .bulk_out_size = 256,
869 .close = pl2303_close,
870 .dtr_rts = pl2303_dtr_rts,
871 .carrier_raised = pl2303_carrier_raised,
872 .ioctl = pl2303_ioctl,
873 .break_ctl = pl2303_break_ctl,
874 .set_termios = pl2303_set_termios,
875 .tiocmget = pl2303_tiocmget,
876 .tiocmset = pl2303_tiocmset,
877 .process_read_urb = pl2303_process_read_urb,
878 .read_int_callback = pl2303_read_int_callback,
879 .attach = pl2303_startup,
880 .release = pl2303_release,
883 static int __init pl2303_init(void)
887 retval = usb_serial_register(&pl2303_device);
889 goto failed_usb_serial_register;
890 retval = usb_register(&pl2303_driver);
892 goto failed_usb_register;
893 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
896 usb_serial_deregister(&pl2303_device);
897 failed_usb_serial_register:
901 static void __exit pl2303_exit(void)
903 usb_deregister(&pl2303_driver);
904 usb_serial_deregister(&pl2303_device);
907 module_init(pl2303_init);
908 module_exit(pl2303_exit);
910 MODULE_DESCRIPTION(DRIVER_DESC);
911 MODULE_LICENSE("GPL");
913 module_param(debug, bool, S_IRUGO | S_IWUSR);
914 MODULE_PARM_DESC(debug, "Debug enabled or not");