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 static const struct usb_device_id id_table[] = {
42 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
43 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
51 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
52 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
53 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
54 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
55 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
56 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
57 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
58 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
59 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
60 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
61 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
62 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
63 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
64 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
65 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
66 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
67 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
68 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
69 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
70 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
71 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
72 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
73 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
74 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
75 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
76 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
77 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
78 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
79 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
80 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
81 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
82 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
83 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
84 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
85 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
86 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
87 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
88 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
89 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
90 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
91 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
92 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
93 { } /* Terminating entry */
96 MODULE_DEVICE_TABLE(usb, id_table);
98 #define SET_LINE_REQUEST_TYPE 0x21
99 #define SET_LINE_REQUEST 0x20
101 #define SET_CONTROL_REQUEST_TYPE 0x21
102 #define SET_CONTROL_REQUEST 0x22
103 #define CONTROL_DTR 0x01
104 #define CONTROL_RTS 0x02
106 #define BREAK_REQUEST_TYPE 0x21
107 #define BREAK_REQUEST 0x23
108 #define BREAK_ON 0xffff
109 #define BREAK_OFF 0x0000
111 #define GET_LINE_REQUEST_TYPE 0xa1
112 #define GET_LINE_REQUEST 0x21
114 #define VENDOR_WRITE_REQUEST_TYPE 0x40
115 #define VENDOR_WRITE_REQUEST 0x01
117 #define VENDOR_READ_REQUEST_TYPE 0xc0
118 #define VENDOR_READ_REQUEST 0x01
120 #define UART_STATE 0x08
121 #define UART_STATE_TRANSIENT_MASK 0x74
122 #define UART_DCD 0x01
123 #define UART_DSR 0x02
124 #define UART_BREAK_ERROR 0x04
125 #define UART_RING 0x08
126 #define UART_FRAME_ERROR 0x10
127 #define UART_PARITY_ERROR 0x20
128 #define UART_OVERRUN_ERROR 0x40
129 #define UART_CTS 0x80
133 type_0, /* don't know the difference between type 0 and */
134 type_1, /* type 1, until someone from prolific tells us... */
135 HX, /* HX version of the pl2303 chip */
138 struct pl2303_private {
140 wait_queue_head_t delta_msr_wait;
143 enum pl2303_type type;
146 static int pl2303_vendor_read(__u16 value, __u16 index,
147 struct usb_serial *serial, unsigned char *buf)
149 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
150 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
151 value, index, buf, 1, 100);
152 dev_dbg(&serial->dev->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n",
153 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
158 static int pl2303_vendor_write(__u16 value, __u16 index,
159 struct usb_serial *serial)
161 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
162 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
163 value, index, NULL, 0, 100);
164 dev_dbg(&serial->dev->dev, "0x%x:0x%x:0x%x:0x%x %d\n",
165 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
170 static int pl2303_startup(struct usb_serial *serial)
172 struct pl2303_private *priv;
173 enum pl2303_type type = type_0;
177 buf = kmalloc(10, GFP_KERNEL);
181 if (serial->dev->descriptor.bDeviceClass == 0x02)
183 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
185 else if (serial->dev->descriptor.bDeviceClass == 0x00)
187 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
189 dev_dbg(&serial->interface->dev, "device type: %d\n", type);
191 for (i = 0; i < serial->num_ports; ++i) {
192 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
195 spin_lock_init(&priv->lock);
196 init_waitqueue_head(&priv->delta_msr_wait);
198 usb_set_serial_port_data(serial->port[i], priv);
201 pl2303_vendor_read(0x8484, 0, serial, buf);
202 pl2303_vendor_write(0x0404, 0, serial);
203 pl2303_vendor_read(0x8484, 0, serial, buf);
204 pl2303_vendor_read(0x8383, 0, serial, buf);
205 pl2303_vendor_read(0x8484, 0, serial, buf);
206 pl2303_vendor_write(0x0404, 1, serial);
207 pl2303_vendor_read(0x8484, 0, serial, buf);
208 pl2303_vendor_read(0x8383, 0, serial, buf);
209 pl2303_vendor_write(0, 1, serial);
210 pl2303_vendor_write(1, 0, serial);
212 pl2303_vendor_write(2, 0x44, serial);
214 pl2303_vendor_write(2, 0x24, serial);
221 for (--i; i >= 0; --i) {
222 priv = usb_get_serial_port_data(serial->port[i]);
224 usb_set_serial_port_data(serial->port[i], NULL);
229 static int set_control_lines(struct usb_device *dev, u8 value)
233 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
234 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
235 value, 0, NULL, 0, 100);
236 dev_dbg(&dev->dev, "%s - value = %d, retval = %d\n", __func__,
241 static void pl2303_set_termios(struct tty_struct *tty,
242 struct usb_serial_port *port, struct ktermios *old_termios)
244 struct usb_serial *serial = port->serial;
245 struct pl2303_private *priv = usb_get_serial_port_data(port);
252 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
253 4800, 7200, 9600, 14400, 19200, 28800, 38400,
254 57600, 115200, 230400, 460800, 614400,
255 921600, 1228800, 2457600, 3000000, 6000000 };
256 int baud_floor, baud_ceil;
259 /* The PL2303 is reported to lose bytes if you change
260 serial settings even to the same values as before. Thus
261 we actually need to filter in this specific case */
263 if (!tty_termios_hw_change(&tty->termios, old_termios))
266 cflag = tty->termios.c_cflag;
268 buf = kzalloc(7, GFP_KERNEL);
270 dev_err(&port->dev, "%s - out of memory.\n", __func__);
271 /* Report back no change occurred */
272 tty->termios = *old_termios;
276 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
277 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
279 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x\n", i,
280 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
283 switch (cflag & CSIZE) {
298 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
301 /* For reference buf[0]:buf[3] baud rate value */
302 /* NOTE: Only the values defined in baud_sup are supported !
303 * => if unsupported values are set, the PL2303 seems to use
304 * 9600 baud (at least my PL2303X always does)
306 baud = tty_get_baud_rate(tty);
307 dev_dbg(&port->dev, "baud requested = %d\n", baud);
309 /* Set baudrate to nearest supported value */
310 for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
311 if (baud_sup[k] / baud) {
312 baud_ceil = baud_sup[k];
316 baud_floor = baud_sup[k-1];
317 if ((baud_ceil % baud)
318 > (baud % baud_floor))
326 if (baud > 1228800) {
327 /* type_0, type_1 only support up to 1228800 baud */
328 if (priv->type != HX)
330 else if (baud > 6000000)
333 dev_dbg(&port->dev, "baud set = %d\n", baud);
334 if (baud <= 115200) {
335 buf[0] = baud & 0xff;
336 buf[1] = (baud >> 8) & 0xff;
337 buf[2] = (baud >> 16) & 0xff;
338 buf[3] = (baud >> 24) & 0xff;
340 /* apparently the formula for higher speeds is:
341 * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
343 unsigned tmp = 12*1000*1000*32 / baud;
346 buf[1] = (tmp >= 256);
355 /* For reference buf[4]=0 is 1 stop bits */
356 /* For reference buf[4]=1 is 1.5 stop bits */
357 /* For reference buf[4]=2 is 2 stop bits */
358 if (cflag & CSTOPB) {
359 /* NOTE: Comply with "real" UARTs / RS232:
360 * use 1.5 instead of 2 stop bits with 5 data bits
362 if ((cflag & CSIZE) == CS5) {
364 dev_dbg(&port->dev, "stop bits = 1.5\n");
367 dev_dbg(&port->dev, "stop bits = 2\n");
371 dev_dbg(&port->dev, "stop bits = 1\n");
374 if (cflag & PARENB) {
375 /* For reference buf[5]=0 is none parity */
376 /* For reference buf[5]=1 is odd parity */
377 /* For reference buf[5]=2 is even parity */
378 /* For reference buf[5]=3 is mark parity */
379 /* For reference buf[5]=4 is space parity */
380 if (cflag & PARODD) {
381 if (cflag & CMSPAR) {
383 dev_dbg(&port->dev, "parity = mark\n");
386 dev_dbg(&port->dev, "parity = odd\n");
389 if (cflag & CMSPAR) {
391 dev_dbg(&port->dev, "parity = space\n");
394 dev_dbg(&port->dev, "parity = even\n");
399 dev_dbg(&port->dev, "parity = none\n");
402 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
403 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
405 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
407 /* change control lines if we are switching to or from B0 */
408 spin_lock_irqsave(&priv->lock, flags);
409 control = priv->line_control;
410 if ((cflag & CBAUD) == B0)
411 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
412 else if ((old_termios->c_cflag & CBAUD) == B0)
413 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
414 if (control != priv->line_control) {
415 control = priv->line_control;
416 spin_unlock_irqrestore(&priv->lock, flags);
417 set_control_lines(serial->dev, control);
419 spin_unlock_irqrestore(&priv->lock, flags);
422 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
424 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
425 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
427 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x\n", i,
428 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
430 if (cflag & CRTSCTS) {
431 if (priv->type == HX)
432 pl2303_vendor_write(0x0, 0x61, serial);
434 pl2303_vendor_write(0x0, 0x41, serial);
436 pl2303_vendor_write(0x0, 0x0, serial);
439 /* Save resulting baud rate */
441 tty_encode_baud_rate(tty, baud, baud);
446 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
448 struct pl2303_private *priv = usb_get_serial_port_data(port);
452 spin_lock_irqsave(&priv->lock, flags);
453 /* Change DTR and RTS */
455 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
457 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
458 control = priv->line_control;
459 spin_unlock_irqrestore(&priv->lock, flags);
460 set_control_lines(port->serial->dev, control);
463 static void pl2303_close(struct usb_serial_port *port)
465 usb_serial_generic_close(port);
466 usb_kill_urb(port->interrupt_in_urb);
469 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
471 struct ktermios tmp_termios;
472 struct usb_serial *serial = port->serial;
473 struct pl2303_private *priv = usb_get_serial_port_data(port);
476 if (priv->type != HX) {
477 usb_clear_halt(serial->dev, port->write_urb->pipe);
478 usb_clear_halt(serial->dev, port->read_urb->pipe);
480 /* reset upstream data pipes */
481 pl2303_vendor_write(8, 0, serial);
482 pl2303_vendor_write(9, 0, serial);
487 pl2303_set_termios(tty, port, &tmp_termios);
489 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
491 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
492 " error %d\n", __func__, result);
496 result = usb_serial_generic_open(tty, port);
498 usb_kill_urb(port->interrupt_in_urb);
502 port->port.drain_delay = 256;
506 static int pl2303_tiocmset(struct tty_struct *tty,
507 unsigned int set, unsigned int clear)
509 struct usb_serial_port *port = tty->driver_data;
510 struct usb_serial *serial = port->serial;
511 struct pl2303_private *priv = usb_get_serial_port_data(port);
516 spin_lock_irqsave(&priv->lock, flags);
518 priv->line_control |= CONTROL_RTS;
520 priv->line_control |= CONTROL_DTR;
521 if (clear & TIOCM_RTS)
522 priv->line_control &= ~CONTROL_RTS;
523 if (clear & TIOCM_DTR)
524 priv->line_control &= ~CONTROL_DTR;
525 control = priv->line_control;
526 spin_unlock_irqrestore(&priv->lock, flags);
528 mutex_lock(&serial->disc_mutex);
529 if (!serial->disconnected)
530 ret = set_control_lines(serial->dev, control);
533 mutex_unlock(&serial->disc_mutex);
538 static int pl2303_tiocmget(struct tty_struct *tty)
540 struct usb_serial_port *port = tty->driver_data;
541 struct pl2303_private *priv = usb_get_serial_port_data(port);
547 spin_lock_irqsave(&priv->lock, flags);
548 mcr = priv->line_control;
549 status = priv->line_status;
550 spin_unlock_irqrestore(&priv->lock, flags);
552 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
553 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
554 | ((status & UART_CTS) ? TIOCM_CTS : 0)
555 | ((status & UART_DSR) ? TIOCM_DSR : 0)
556 | ((status & UART_RING) ? TIOCM_RI : 0)
557 | ((status & UART_DCD) ? TIOCM_CD : 0);
559 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
564 static int pl2303_carrier_raised(struct usb_serial_port *port)
566 struct pl2303_private *priv = usb_get_serial_port_data(port);
567 if (priv->line_status & UART_DCD)
572 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
574 struct pl2303_private *priv = usb_get_serial_port_data(port);
576 unsigned int prevstatus;
578 unsigned int changed;
580 spin_lock_irqsave(&priv->lock, flags);
581 prevstatus = priv->line_status;
582 spin_unlock_irqrestore(&priv->lock, flags);
585 interruptible_sleep_on(&priv->delta_msr_wait);
586 /* see if a signal did it */
587 if (signal_pending(current))
590 spin_lock_irqsave(&priv->lock, flags);
591 status = priv->line_status;
592 spin_unlock_irqrestore(&priv->lock, flags);
594 changed = prevstatus ^ status;
596 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
597 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
598 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
599 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
608 static int pl2303_ioctl(struct tty_struct *tty,
609 unsigned int cmd, unsigned long arg)
611 struct serial_struct ser;
612 struct usb_serial_port *port = tty->driver_data;
614 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
618 memset(&ser, 0, sizeof ser);
619 ser.type = PORT_16654;
620 ser.line = port->serial->minor;
621 ser.port = port->number;
622 ser.baud_base = 460800;
624 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
630 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
631 return wait_modem_info(port, arg);
633 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
639 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
641 struct usb_serial_port *port = tty->driver_data;
642 struct usb_serial *serial = port->serial;
646 if (break_state == 0)
650 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
651 state == BREAK_OFF ? "off" : "on");
653 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
654 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
657 dev_err(&port->dev, "error sending break = %d\n", result);
660 static void pl2303_release(struct usb_serial *serial)
663 struct pl2303_private *priv;
665 for (i = 0; i < serial->num_ports; ++i) {
666 priv = usb_get_serial_port_data(serial->port[i]);
671 static void pl2303_update_line_status(struct usb_serial_port *port,
673 unsigned int actual_length)
676 struct pl2303_private *priv = usb_get_serial_port_data(port);
677 struct tty_struct *tty;
679 u8 status_idx = UART_STATE;
680 u8 length = UART_STATE + 1;
684 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
685 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
688 if (idv == SIEMENS_VENDOR_ID) {
689 if (idp == SIEMENS_PRODUCT_ID_X65 ||
690 idp == SIEMENS_PRODUCT_ID_SX1 ||
691 idp == SIEMENS_PRODUCT_ID_X75) {
698 if (actual_length < length)
701 /* Save off the uart status for others to look at */
702 spin_lock_irqsave(&priv->lock, flags);
703 prev_line_status = priv->line_status;
704 priv->line_status = data[status_idx];
705 spin_unlock_irqrestore(&priv->lock, flags);
706 if (priv->line_status & UART_BREAK_ERROR)
707 usb_serial_handle_break(port);
708 wake_up_interruptible(&priv->delta_msr_wait);
710 tty = tty_port_tty_get(&port->port);
713 if ((priv->line_status ^ prev_line_status) & UART_DCD)
714 usb_serial_handle_dcd_change(port, tty,
715 priv->line_status & UART_DCD);
719 static void pl2303_read_int_callback(struct urb *urb)
721 struct usb_serial_port *port = urb->context;
722 unsigned char *data = urb->transfer_buffer;
723 unsigned int actual_length = urb->actual_length;
724 int status = urb->status;
734 /* this urb is terminated, clean up */
735 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
739 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
744 usb_serial_debug_data(debug, &port->dev, __func__,
745 urb->actual_length, urb->transfer_buffer);
747 pl2303_update_line_status(port, data, actual_length);
750 retval = usb_submit_urb(urb, GFP_ATOMIC);
753 "%s - usb_submit_urb failed with result %d\n",
757 static void pl2303_process_read_urb(struct urb *urb)
759 struct usb_serial_port *port = urb->context;
760 struct pl2303_private *priv = usb_get_serial_port_data(port);
761 struct tty_struct *tty;
762 unsigned char *data = urb->transfer_buffer;
763 char tty_flag = TTY_NORMAL;
768 /* update line status */
769 spin_lock_irqsave(&priv->lock, flags);
770 line_status = priv->line_status;
771 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
772 spin_unlock_irqrestore(&priv->lock, flags);
773 wake_up_interruptible(&priv->delta_msr_wait);
775 if (!urb->actual_length)
778 tty = tty_port_tty_get(&port->port);
782 /* break takes precedence over parity, */
783 /* which takes precedence over framing errors */
784 if (line_status & UART_BREAK_ERROR)
785 tty_flag = TTY_BREAK;
786 else if (line_status & UART_PARITY_ERROR)
787 tty_flag = TTY_PARITY;
788 else if (line_status & UART_FRAME_ERROR)
789 tty_flag = TTY_FRAME;
790 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
792 /* overrun is special, not associated with a char */
793 if (line_status & UART_OVERRUN_ERROR)
794 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
796 if (port->port.console && port->sysrq) {
797 for (i = 0; i < urb->actual_length; ++i)
798 if (!usb_serial_handle_sysrq_char(port, data[i]))
799 tty_insert_flip_char(tty, data[i], tty_flag);
801 tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
805 tty_flip_buffer_push(tty);
809 /* All of the device info needed for the PL2303 SIO serial converter */
810 static struct usb_serial_driver pl2303_device = {
812 .owner = THIS_MODULE,
815 .id_table = id_table,
818 .bulk_out_size = 256,
820 .close = pl2303_close,
821 .dtr_rts = pl2303_dtr_rts,
822 .carrier_raised = pl2303_carrier_raised,
823 .ioctl = pl2303_ioctl,
824 .break_ctl = pl2303_break_ctl,
825 .set_termios = pl2303_set_termios,
826 .tiocmget = pl2303_tiocmget,
827 .tiocmset = pl2303_tiocmset,
828 .process_read_urb = pl2303_process_read_urb,
829 .read_int_callback = pl2303_read_int_callback,
830 .attach = pl2303_startup,
831 .release = pl2303_release,
834 static struct usb_serial_driver * const serial_drivers[] = {
838 module_usb_serial_driver(serial_drivers, id_table);
840 MODULE_DESCRIPTION(DRIVER_DESC);
841 MODULE_LICENSE("GPL");
843 module_param(debug, bool, S_IRUGO | S_IWUSR);
844 MODULE_PARM_DESC(debug, "Debug enabled or not");