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);
364 switch (C_CSIZE(tty)) {
378 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
380 /* For reference buf[0]:buf[3] baud rate value */
381 pl2303_encode_baudrate(tty, port, &buf[0]);
383 /* For reference buf[4]=0 is 1 stop bits */
384 /* For reference buf[4]=1 is 1.5 stop bits */
385 /* For reference buf[4]=2 is 2 stop bits */
388 * NOTE: Comply with "real" UARTs / RS232:
389 * use 1.5 instead of 2 stop bits with 5 data bits
391 if (C_CSIZE(tty) == CS5) {
393 dev_dbg(&port->dev, "stop bits = 1.5\n");
396 dev_dbg(&port->dev, "stop bits = 2\n");
400 dev_dbg(&port->dev, "stop bits = 1\n");
404 /* For reference buf[5]=0 is none parity */
405 /* For reference buf[5]=1 is odd parity */
406 /* For reference buf[5]=2 is even parity */
407 /* For reference buf[5]=3 is mark parity */
408 /* For reference buf[5]=4 is space parity */
410 if (tty->termios.c_cflag & CMSPAR) {
412 dev_dbg(&port->dev, "parity = mark\n");
415 dev_dbg(&port->dev, "parity = odd\n");
418 if (tty->termios.c_cflag & CMSPAR) {
420 dev_dbg(&port->dev, "parity = space\n");
423 dev_dbg(&port->dev, "parity = even\n");
428 dev_dbg(&port->dev, "parity = none\n");
431 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
432 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
434 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i);
436 /* change control lines if we are switching to or from B0 */
437 spin_lock_irqsave(&priv->lock, flags);
438 control = priv->line_control;
439 if (C_BAUD(tty) == B0)
440 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
441 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
442 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
443 if (control != priv->line_control) {
444 control = priv->line_control;
445 spin_unlock_irqrestore(&priv->lock, flags);
446 pl2303_set_control_lines(port, control);
448 spin_unlock_irqrestore(&priv->lock, flags);
452 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
453 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
455 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf);
457 if (C_CRTSCTS(tty)) {
458 if (spriv->type == HX)
459 pl2303_vendor_write(0x0, 0x61, serial);
461 pl2303_vendor_write(0x0, 0x41, serial);
463 pl2303_vendor_write(0x0, 0x0, serial);
469 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
471 struct pl2303_private *priv = usb_get_serial_port_data(port);
475 spin_lock_irqsave(&priv->lock, flags);
476 /* Change DTR and RTS */
478 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
480 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
481 control = priv->line_control;
482 spin_unlock_irqrestore(&priv->lock, flags);
483 pl2303_set_control_lines(port, control);
486 static void pl2303_close(struct usb_serial_port *port)
488 usb_serial_generic_close(port);
489 usb_kill_urb(port->interrupt_in_urb);
492 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
494 struct usb_serial *serial = port->serial;
495 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
498 if (spriv->type != HX) {
499 usb_clear_halt(serial->dev, port->write_urb->pipe);
500 usb_clear_halt(serial->dev, port->read_urb->pipe);
502 /* reset upstream data pipes */
503 pl2303_vendor_write(8, 0, serial);
504 pl2303_vendor_write(9, 0, serial);
509 pl2303_set_termios(tty, port, NULL);
511 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
513 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
514 " error %d\n", __func__, result);
518 result = usb_serial_generic_open(tty, port);
520 usb_kill_urb(port->interrupt_in_urb);
527 static int pl2303_tiocmset(struct tty_struct *tty,
528 unsigned int set, unsigned int clear)
530 struct usb_serial_port *port = tty->driver_data;
531 struct pl2303_private *priv = usb_get_serial_port_data(port);
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 ret = pl2303_set_control_lines(port, control);
550 return usb_translate_errors(ret);
555 static int pl2303_tiocmget(struct tty_struct *tty)
557 struct usb_serial_port *port = tty->driver_data;
558 struct pl2303_private *priv = usb_get_serial_port_data(port);
564 spin_lock_irqsave(&priv->lock, flags);
565 mcr = priv->line_control;
566 status = priv->line_status;
567 spin_unlock_irqrestore(&priv->lock, flags);
569 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
570 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
571 | ((status & UART_CTS) ? TIOCM_CTS : 0)
572 | ((status & UART_DSR) ? TIOCM_DSR : 0)
573 | ((status & UART_RING) ? TIOCM_RI : 0)
574 | ((status & UART_DCD) ? TIOCM_CD : 0);
576 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
581 static int pl2303_carrier_raised(struct usb_serial_port *port)
583 struct pl2303_private *priv = usb_get_serial_port_data(port);
584 if (priv->line_status & UART_DCD)
589 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
591 struct usb_serial_port *port = tty->driver_data;
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(&port->port.delta_msr_wait);
604 /* see if a signal did it */
605 if (signal_pending(current))
608 if (port->serial->disconnected)
611 spin_lock_irqsave(&priv->lock, flags);
612 status = priv->line_status;
613 spin_unlock_irqrestore(&priv->lock, flags);
615 changed = prevstatus ^ status;
617 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
618 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
619 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
620 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
629 static int pl2303_ioctl(struct tty_struct *tty,
630 unsigned int cmd, unsigned long arg)
632 struct serial_struct ser;
633 struct usb_serial_port *port = tty->driver_data;
635 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
639 memset(&ser, 0, sizeof ser);
640 ser.type = PORT_16654;
641 ser.line = port->minor;
642 ser.port = port->port_number;
643 ser.baud_base = 460800;
645 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
650 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __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 if (break_state == 0)
667 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
668 state == BREAK_OFF ? "off" : "on");
670 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
671 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
674 dev_err(&port->dev, "error sending break = %d\n", result);
677 static void pl2303_update_line_status(struct usb_serial_port *port,
679 unsigned int actual_length)
682 struct pl2303_private *priv = usb_get_serial_port_data(port);
683 struct tty_struct *tty;
685 u8 status_idx = UART_STATE;
686 u8 length = UART_STATE + 1;
690 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
691 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
694 if (idv == SIEMENS_VENDOR_ID) {
695 if (idp == SIEMENS_PRODUCT_ID_X65 ||
696 idp == SIEMENS_PRODUCT_ID_SX1 ||
697 idp == SIEMENS_PRODUCT_ID_X75) {
704 if (actual_length < length)
707 /* Save off the uart status for others to look at */
708 spin_lock_irqsave(&priv->lock, flags);
709 prev_line_status = priv->line_status;
710 priv->line_status = data[status_idx];
711 spin_unlock_irqrestore(&priv->lock, flags);
712 if (priv->line_status & UART_BREAK_ERROR)
713 usb_serial_handle_break(port);
714 wake_up_interruptible(&port->port.delta_msr_wait);
716 tty = tty_port_tty_get(&port->port);
719 if ((priv->line_status ^ prev_line_status) & UART_DCD)
720 usb_serial_handle_dcd_change(port, tty,
721 priv->line_status & UART_DCD);
725 static void pl2303_read_int_callback(struct urb *urb)
727 struct usb_serial_port *port = urb->context;
728 unsigned char *data = urb->transfer_buffer;
729 unsigned int actual_length = urb->actual_length;
730 int status = urb->status;
740 /* this urb is terminated, clean up */
741 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
745 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
750 usb_serial_debug_data(&port->dev, __func__,
751 urb->actual_length, urb->transfer_buffer);
753 pl2303_update_line_status(port, data, actual_length);
756 retval = usb_submit_urb(urb, GFP_ATOMIC);
759 "%s - usb_submit_urb failed with result %d\n",
763 static void pl2303_process_read_urb(struct urb *urb)
765 struct usb_serial_port *port = urb->context;
766 struct pl2303_private *priv = usb_get_serial_port_data(port);
767 unsigned char *data = urb->transfer_buffer;
768 char tty_flag = TTY_NORMAL;
773 /* update line status */
774 spin_lock_irqsave(&priv->lock, flags);
775 line_status = priv->line_status;
776 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
777 spin_unlock_irqrestore(&priv->lock, flags);
778 wake_up_interruptible(&port->port.delta_msr_wait);
780 if (!urb->actual_length)
783 /* break takes precedence over parity, */
784 /* which takes precedence over framing errors */
785 if (line_status & UART_BREAK_ERROR)
786 tty_flag = TTY_BREAK;
787 else if (line_status & UART_PARITY_ERROR)
788 tty_flag = TTY_PARITY;
789 else if (line_status & UART_FRAME_ERROR)
790 tty_flag = TTY_FRAME;
792 if (tty_flag != TTY_NORMAL)
793 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
795 /* overrun is special, not associated with a char */
796 if (line_status & UART_OVERRUN_ERROR)
797 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
799 if (port->port.console && port->sysrq) {
800 for (i = 0; i < urb->actual_length; ++i)
801 if (!usb_serial_handle_sysrq_char(port, data[i]))
802 tty_insert_flip_char(&port->port, data[i],
805 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
809 tty_flip_buffer_push(&port->port);
812 /* All of the device info needed for the PL2303 SIO serial converter */
813 static struct usb_serial_driver pl2303_device = {
815 .owner = THIS_MODULE,
818 .id_table = id_table,
821 .bulk_out_size = 256,
823 .close = pl2303_close,
824 .dtr_rts = pl2303_dtr_rts,
825 .carrier_raised = pl2303_carrier_raised,
826 .ioctl = pl2303_ioctl,
827 .break_ctl = pl2303_break_ctl,
828 .set_termios = pl2303_set_termios,
829 .tiocmget = pl2303_tiocmget,
830 .tiocmset = pl2303_tiocmset,
831 .tiocmiwait = pl2303_tiocmiwait,
832 .process_read_urb = pl2303_process_read_urb,
833 .read_int_callback = pl2303_read_int_callback,
834 .attach = pl2303_startup,
835 .release = pl2303_release,
836 .port_probe = pl2303_port_probe,
837 .port_remove = pl2303_port_remove,
840 static struct usb_serial_driver * const serial_drivers[] = {
844 module_usb_serial_driver(serial_drivers, id_table);
846 MODULE_DESCRIPTION(DRIVER_DESC);
847 MODULE_LICENSE("GPL");