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>
32 #include <asm/unaligned.h>
38 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
40 static const struct usb_device_id id_table[] = {
41 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
42 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
43 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
51 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
52 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
53 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
54 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
55 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
56 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
57 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
58 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
59 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
60 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
61 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
62 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
63 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
64 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
65 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
66 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
67 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
68 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
69 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
70 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
71 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
72 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
73 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
74 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
75 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
76 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
77 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
78 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
79 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
80 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
81 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
82 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
83 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
84 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
85 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
86 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
87 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
88 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
89 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
90 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
91 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
92 { } /* Terminating entry */
95 MODULE_DEVICE_TABLE(usb, id_table);
97 #define SET_LINE_REQUEST_TYPE 0x21
98 #define SET_LINE_REQUEST 0x20
100 #define SET_CONTROL_REQUEST_TYPE 0x21
101 #define SET_CONTROL_REQUEST 0x22
102 #define CONTROL_DTR 0x01
103 #define CONTROL_RTS 0x02
105 #define BREAK_REQUEST_TYPE 0x21
106 #define BREAK_REQUEST 0x23
107 #define BREAK_ON 0xffff
108 #define BREAK_OFF 0x0000
110 #define GET_LINE_REQUEST_TYPE 0xa1
111 #define GET_LINE_REQUEST 0x21
113 #define VENDOR_WRITE_REQUEST_TYPE 0x40
114 #define VENDOR_WRITE_REQUEST 0x01
116 #define VENDOR_READ_REQUEST_TYPE 0xc0
117 #define VENDOR_READ_REQUEST 0x01
119 #define UART_STATE 0x08
120 #define UART_STATE_TRANSIENT_MASK 0x74
121 #define UART_DCD 0x01
122 #define UART_DSR 0x02
123 #define UART_BREAK_ERROR 0x04
124 #define UART_RING 0x08
125 #define UART_FRAME_ERROR 0x10
126 #define UART_PARITY_ERROR 0x20
127 #define UART_OVERRUN_ERROR 0x40
128 #define UART_CTS 0x80
132 type_0, /* don't know the difference between type 0 and */
133 type_1, /* type 1, until someone from prolific tells us... */
134 HX, /* HX version of the pl2303 chip */
137 struct pl2303_serial_private {
138 enum pl2303_type type;
141 struct pl2303_private {
147 static int pl2303_vendor_read(__u16 value, __u16 index,
148 struct usb_serial *serial, unsigned char *buf)
150 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
151 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
152 value, index, buf, 1, 100);
153 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n",
154 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
159 static int pl2303_vendor_write(__u16 value, __u16 index,
160 struct usb_serial *serial)
162 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
163 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
164 value, index, NULL, 0, 100);
165 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n",
166 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
171 static int pl2303_startup(struct usb_serial *serial)
173 struct pl2303_serial_private *spriv;
174 enum pl2303_type type = type_0;
177 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
181 buf = kmalloc(10, GFP_KERNEL);
187 if (serial->dev->descriptor.bDeviceClass == 0x02)
189 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
191 else if (serial->dev->descriptor.bDeviceClass == 0x00)
193 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
195 dev_dbg(&serial->interface->dev, "device type: %d\n", type);
198 usb_set_serial_data(serial, spriv);
200 pl2303_vendor_read(0x8484, 0, serial, buf);
201 pl2303_vendor_write(0x0404, 0, serial);
202 pl2303_vendor_read(0x8484, 0, serial, buf);
203 pl2303_vendor_read(0x8383, 0, serial, buf);
204 pl2303_vendor_read(0x8484, 0, serial, buf);
205 pl2303_vendor_write(0x0404, 1, serial);
206 pl2303_vendor_read(0x8484, 0, serial, buf);
207 pl2303_vendor_read(0x8383, 0, serial, buf);
208 pl2303_vendor_write(0, 1, serial);
209 pl2303_vendor_write(1, 0, serial);
211 pl2303_vendor_write(2, 0x44, serial);
213 pl2303_vendor_write(2, 0x24, serial);
219 static void pl2303_release(struct usb_serial *serial)
221 struct pl2303_serial_private *spriv;
223 spriv = usb_get_serial_data(serial);
227 static int pl2303_port_probe(struct usb_serial_port *port)
229 struct pl2303_private *priv;
231 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
235 spin_lock_init(&priv->lock);
237 usb_set_serial_port_data(port, priv);
239 port->port.drain_delay = 256;
244 static int pl2303_port_remove(struct usb_serial_port *port)
246 struct pl2303_private *priv;
248 priv = usb_get_serial_port_data(port);
254 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
256 struct usb_device *dev = port->serial->dev;
259 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
260 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
261 value, 0, NULL, 0, 100);
262 dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
267 static void pl2303_encode_baudrate(struct tty_struct *tty,
268 struct usb_serial_port *port,
271 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
272 4800, 7200, 9600, 14400, 19200, 28800, 38400,
273 57600, 115200, 230400, 460800, 500000, 614400,
274 921600, 1228800, 2457600, 3000000, 6000000 };
276 struct usb_serial *serial = port->serial;
277 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
282 * NOTE: Only the values defined in baud_sup are supported!
283 * => if unsupported values are set, the PL2303 seems to use
284 * 9600 baud (at least my PL2303X always does)
286 baud = tty_get_baud_rate(tty);
287 dev_dbg(&port->dev, "baud requested = %d\n", baud);
291 /* Set baudrate to nearest supported value */
292 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
293 if (baud_sup[i] > baud)
297 if (i == ARRAY_SIZE(baud_sup))
298 baud = baud_sup[i - 1];
299 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
300 baud = baud_sup[i - 1];
304 /* type_0, type_1 only support up to 1228800 baud */
305 if (spriv->type != HX)
306 baud = min_t(int, baud, 1228800);
308 if (baud <= 115200) {
309 put_unaligned_le32(baud, buf);
312 * Apparently the formula for higher speeds is:
313 * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
315 unsigned tmp = 12000000 * 32 / baud;
318 buf[1] = (tmp >= 256);
326 /* Save resulting baud rate */
327 tty_encode_baud_rate(tty, baud, baud);
328 dev_dbg(&port->dev, "baud set = %d\n", baud);
331 static void pl2303_set_termios(struct tty_struct *tty,
332 struct usb_serial_port *port, struct ktermios *old_termios)
334 struct usb_serial *serial = port->serial;
335 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
336 struct pl2303_private *priv = usb_get_serial_port_data(port);
343 * The PL2303 is reported to lose bytes if you change serial settings
344 * even to the same values as before. Thus we actually need to filter
345 * in this specific case.
347 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
350 buf = kzalloc(7, GFP_KERNEL);
352 dev_err(&port->dev, "%s - out of memory.\n", __func__);
353 /* Report back no change occurred */
355 tty->termios = *old_termios;
359 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
360 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
362 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
365 switch (C_CSIZE(tty)) {
379 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
382 /* For reference buf[0]:buf[3] baud rate value */
383 pl2303_encode_baudrate(tty, port, &buf[0]);
385 /* For reference buf[4]=0 is 1 stop bits */
386 /* For reference buf[4]=1 is 1.5 stop bits */
387 /* For reference buf[4]=2 is 2 stop bits */
390 * NOTE: Comply with "real" UARTs / RS232:
391 * use 1.5 instead of 2 stop bits with 5 data bits
393 if (C_CSIZE(tty) == CS5) {
395 dev_dbg(&port->dev, "stop bits = 1.5\n");
398 dev_dbg(&port->dev, "stop bits = 2\n");
402 dev_dbg(&port->dev, "stop bits = 1\n");
406 /* For reference buf[5]=0 is none parity */
407 /* For reference buf[5]=1 is odd parity */
408 /* For reference buf[5]=2 is even parity */
409 /* For reference buf[5]=3 is mark parity */
410 /* For reference buf[5]=4 is space parity */
412 if (tty->termios.c_cflag & CMSPAR) {
414 dev_dbg(&port->dev, "parity = mark\n");
417 dev_dbg(&port->dev, "parity = odd\n");
420 if (tty->termios.c_cflag & CMSPAR) {
422 dev_dbg(&port->dev, "parity = space\n");
425 dev_dbg(&port->dev, "parity = even\n");
430 dev_dbg(&port->dev, "parity = none\n");
433 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
434 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
436 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
438 /* change control lines if we are switching to or from B0 */
439 spin_lock_irqsave(&priv->lock, flags);
440 control = priv->line_control;
441 if (C_BAUD(tty) == B0)
442 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
443 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
444 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
445 if (control != priv->line_control) {
446 control = priv->line_control;
447 spin_unlock_irqrestore(&priv->lock, flags);
448 pl2303_set_control_lines(port, control);
450 spin_unlock_irqrestore(&priv->lock, flags);
454 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
455 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
457 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
459 if (C_CRTSCTS(tty)) {
460 if (spriv->type == HX)
461 pl2303_vendor_write(0x0, 0x61, serial);
463 pl2303_vendor_write(0x0, 0x41, serial);
465 pl2303_vendor_write(0x0, 0x0, serial);
471 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
473 struct pl2303_private *priv = usb_get_serial_port_data(port);
477 spin_lock_irqsave(&priv->lock, flags);
478 /* Change DTR and RTS */
480 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
482 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
483 control = priv->line_control;
484 spin_unlock_irqrestore(&priv->lock, flags);
485 pl2303_set_control_lines(port, control);
488 static void pl2303_close(struct usb_serial_port *port)
490 usb_serial_generic_close(port);
491 usb_kill_urb(port->interrupt_in_urb);
494 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
496 struct usb_serial *serial = port->serial;
497 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
500 if (spriv->type != HX) {
501 usb_clear_halt(serial->dev, port->write_urb->pipe);
502 usb_clear_halt(serial->dev, port->read_urb->pipe);
504 /* reset upstream data pipes */
505 pl2303_vendor_write(8, 0, serial);
506 pl2303_vendor_write(9, 0, serial);
511 pl2303_set_termios(tty, port, NULL);
513 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
515 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
516 " error %d\n", __func__, result);
520 result = usb_serial_generic_open(tty, port);
522 usb_kill_urb(port->interrupt_in_urb);
529 static int pl2303_tiocmset(struct tty_struct *tty,
530 unsigned int set, unsigned int clear)
532 struct usb_serial_port *port = tty->driver_data;
533 struct pl2303_private *priv = usb_get_serial_port_data(port);
538 spin_lock_irqsave(&priv->lock, flags);
540 priv->line_control |= CONTROL_RTS;
542 priv->line_control |= CONTROL_DTR;
543 if (clear & TIOCM_RTS)
544 priv->line_control &= ~CONTROL_RTS;
545 if (clear & TIOCM_DTR)
546 priv->line_control &= ~CONTROL_DTR;
547 control = priv->line_control;
548 spin_unlock_irqrestore(&priv->lock, flags);
550 ret = pl2303_set_control_lines(port, control);
552 return usb_translate_errors(ret);
557 static int pl2303_tiocmget(struct tty_struct *tty)
559 struct usb_serial_port *port = tty->driver_data;
560 struct pl2303_private *priv = usb_get_serial_port_data(port);
566 spin_lock_irqsave(&priv->lock, flags);
567 mcr = priv->line_control;
568 status = priv->line_status;
569 spin_unlock_irqrestore(&priv->lock, flags);
571 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
572 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
573 | ((status & UART_CTS) ? TIOCM_CTS : 0)
574 | ((status & UART_DSR) ? TIOCM_DSR : 0)
575 | ((status & UART_RING) ? TIOCM_RI : 0)
576 | ((status & UART_DCD) ? TIOCM_CD : 0);
578 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
583 static int pl2303_carrier_raised(struct usb_serial_port *port)
585 struct pl2303_private *priv = usb_get_serial_port_data(port);
586 if (priv->line_status & UART_DCD)
591 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
593 struct usb_serial_port *port = tty->driver_data;
594 struct pl2303_private *priv = usb_get_serial_port_data(port);
596 unsigned int prevstatus;
598 unsigned int changed;
600 spin_lock_irqsave(&priv->lock, flags);
601 prevstatus = priv->line_status;
602 spin_unlock_irqrestore(&priv->lock, flags);
605 interruptible_sleep_on(&port->port.delta_msr_wait);
606 /* see if a signal did it */
607 if (signal_pending(current))
610 if (port->serial->disconnected)
613 spin_lock_irqsave(&priv->lock, flags);
614 status = priv->line_status;
615 spin_unlock_irqrestore(&priv->lock, flags);
617 changed = prevstatus ^ status;
619 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
620 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
621 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
622 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
631 static int pl2303_ioctl(struct tty_struct *tty,
632 unsigned int cmd, unsigned long arg)
634 struct serial_struct ser;
635 struct usb_serial_port *port = tty->driver_data;
637 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
641 memset(&ser, 0, sizeof ser);
642 ser.type = PORT_16654;
643 ser.line = port->minor;
644 ser.port = port->port_number;
645 ser.baud_base = 460800;
647 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
652 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
658 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
660 struct usb_serial_port *port = tty->driver_data;
661 struct usb_serial *serial = port->serial;
665 if (break_state == 0)
669 dev_dbg(&port->dev, "%s - turning break %s\n", __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 dev_err(&port->dev, "error sending break = %d\n", result);
679 static void pl2303_update_line_status(struct usb_serial_port *port,
681 unsigned int actual_length)
684 struct pl2303_private *priv = usb_get_serial_port_data(port);
685 struct tty_struct *tty;
687 u8 status_idx = UART_STATE;
688 u8 length = UART_STATE + 1;
692 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
693 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
696 if (idv == SIEMENS_VENDOR_ID) {
697 if (idp == SIEMENS_PRODUCT_ID_X65 ||
698 idp == SIEMENS_PRODUCT_ID_SX1 ||
699 idp == SIEMENS_PRODUCT_ID_X75) {
706 if (actual_length < length)
709 /* Save off the uart status for others to look at */
710 spin_lock_irqsave(&priv->lock, flags);
711 prev_line_status = priv->line_status;
712 priv->line_status = data[status_idx];
713 spin_unlock_irqrestore(&priv->lock, flags);
714 if (priv->line_status & UART_BREAK_ERROR)
715 usb_serial_handle_break(port);
716 wake_up_interruptible(&port->port.delta_msr_wait);
718 tty = tty_port_tty_get(&port->port);
721 if ((priv->line_status ^ prev_line_status) & UART_DCD)
722 usb_serial_handle_dcd_change(port, tty,
723 priv->line_status & UART_DCD);
727 static void pl2303_read_int_callback(struct urb *urb)
729 struct usb_serial_port *port = urb->context;
730 unsigned char *data = urb->transfer_buffer;
731 unsigned int actual_length = urb->actual_length;
732 int status = urb->status;
742 /* this urb is terminated, clean up */
743 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
747 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
752 usb_serial_debug_data(&port->dev, __func__,
753 urb->actual_length, urb->transfer_buffer);
755 pl2303_update_line_status(port, data, actual_length);
758 retval = usb_submit_urb(urb, GFP_ATOMIC);
761 "%s - usb_submit_urb failed with result %d\n",
765 static void pl2303_process_read_urb(struct urb *urb)
767 struct usb_serial_port *port = urb->context;
768 struct pl2303_private *priv = usb_get_serial_port_data(port);
769 unsigned char *data = urb->transfer_buffer;
770 char tty_flag = TTY_NORMAL;
775 /* update line status */
776 spin_lock_irqsave(&priv->lock, flags);
777 line_status = priv->line_status;
778 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
779 spin_unlock_irqrestore(&priv->lock, flags);
780 wake_up_interruptible(&port->port.delta_msr_wait);
782 if (!urb->actual_length)
785 /* break takes precedence over parity, */
786 /* which takes precedence over framing errors */
787 if (line_status & UART_BREAK_ERROR)
788 tty_flag = TTY_BREAK;
789 else if (line_status & UART_PARITY_ERROR)
790 tty_flag = TTY_PARITY;
791 else if (line_status & UART_FRAME_ERROR)
792 tty_flag = TTY_FRAME;
794 if (tty_flag != TTY_NORMAL)
795 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
797 /* overrun is special, not associated with a char */
798 if (line_status & UART_OVERRUN_ERROR)
799 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
801 if (port->port.console && port->sysrq) {
802 for (i = 0; i < urb->actual_length; ++i)
803 if (!usb_serial_handle_sysrq_char(port, data[i]))
804 tty_insert_flip_char(&port->port, data[i],
807 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
811 tty_flip_buffer_push(&port->port);
814 /* All of the device info needed for the PL2303 SIO serial converter */
815 static struct usb_serial_driver pl2303_device = {
817 .owner = THIS_MODULE,
820 .id_table = id_table,
823 .bulk_out_size = 256,
825 .close = pl2303_close,
826 .dtr_rts = pl2303_dtr_rts,
827 .carrier_raised = pl2303_carrier_raised,
828 .ioctl = pl2303_ioctl,
829 .break_ctl = pl2303_break_ctl,
830 .set_termios = pl2303_set_termios,
831 .tiocmget = pl2303_tiocmget,
832 .tiocmset = pl2303_tiocmset,
833 .tiocmiwait = pl2303_tiocmiwait,
834 .process_read_urb = pl2303_process_read_urb,
835 .read_int_callback = pl2303_read_int_callback,
836 .attach = pl2303_startup,
837 .release = pl2303_release,
838 .port_probe = pl2303_port_probe,
839 .port_remove = pl2303_port_remove,
842 static struct usb_serial_driver * const serial_drivers[] = {
846 module_usb_serial_driver(serial_drivers, id_table);
848 MODULE_DESCRIPTION(DRIVER_DESC);
849 MODULE_LICENSE("GPL");