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 #define PL2303_BUF_SIZE 1024
44 #define PL2303_TMP_BUF_SIZE 1024
47 unsigned int buf_size;
53 static const struct usb_device_id id_table[] = {
54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
56 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
57 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
58 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
59 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
60 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
61 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
62 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
63 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
64 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
65 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
66 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
67 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
68 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
69 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
70 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
71 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
72 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
73 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
74 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
75 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
76 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
77 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
78 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
79 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
80 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
81 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
82 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
83 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
84 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
85 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
86 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
87 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
88 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
89 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
90 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
91 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
92 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
93 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
94 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
95 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
96 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
97 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
98 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
99 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
100 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
101 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
102 { } /* Terminating entry */
105 MODULE_DEVICE_TABLE(usb, id_table);
107 static struct usb_driver pl2303_driver = {
109 .probe = usb_serial_probe,
110 .disconnect = usb_serial_disconnect,
111 .id_table = id_table,
112 .suspend = usb_serial_suspend,
113 .resume = usb_serial_resume,
115 .supports_autosuspend = 1,
118 #define SET_LINE_REQUEST_TYPE 0x21
119 #define SET_LINE_REQUEST 0x20
121 #define SET_CONTROL_REQUEST_TYPE 0x21
122 #define SET_CONTROL_REQUEST 0x22
123 #define CONTROL_DTR 0x01
124 #define CONTROL_RTS 0x02
126 #define BREAK_REQUEST_TYPE 0x21
127 #define BREAK_REQUEST 0x23
128 #define BREAK_ON 0xffff
129 #define BREAK_OFF 0x0000
131 #define GET_LINE_REQUEST_TYPE 0xa1
132 #define GET_LINE_REQUEST 0x21
134 #define VENDOR_WRITE_REQUEST_TYPE 0x40
135 #define VENDOR_WRITE_REQUEST 0x01
137 #define VENDOR_READ_REQUEST_TYPE 0xc0
138 #define VENDOR_READ_REQUEST 0x01
140 #define UART_STATE 0x08
141 #define UART_STATE_TRANSIENT_MASK 0x74
142 #define UART_DCD 0x01
143 #define UART_DSR 0x02
144 #define UART_BREAK_ERROR 0x04
145 #define UART_RING 0x08
146 #define UART_FRAME_ERROR 0x10
147 #define UART_PARITY_ERROR 0x20
148 #define UART_OVERRUN_ERROR 0x40
149 #define UART_CTS 0x80
153 type_0, /* don't know the difference between type 0 and */
154 type_1, /* type 1, until someone from prolific tells us... */
155 HX, /* HX version of the pl2303 chip */
158 struct pl2303_private {
160 struct pl2303_buf *buf;
161 int write_urb_in_use;
162 wait_queue_head_t delta_msr_wait;
165 enum pl2303_type type;
171 * Allocate a circular buffer and all associated memory.
173 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
175 struct pl2303_buf *pb;
180 pb = kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
184 pb->buf_buf = kmalloc(size, GFP_KERNEL);
185 if (pb->buf_buf == NULL) {
191 pb->buf_get = pb->buf_put = pb->buf_buf;
199 * Free the buffer and all associated memory.
201 static void pl2303_buf_free(struct pl2303_buf *pb)
212 * Clear out all data in the circular buffer.
214 static void pl2303_buf_clear(struct pl2303_buf *pb)
217 pb->buf_get = pb->buf_put;
218 /* equivalent to a get of all data available */
222 * pl2303_buf_data_avail
224 * Return the number of bytes of data available in the circular
227 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
232 return (pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size;
236 * pl2303_buf_space_avail
238 * Return the number of bytes of space available in the circular
241 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
246 return (pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size;
252 * Copy data data from a user buffer and put it into the circular buffer.
253 * Restrict to the amount of space available.
255 * Return the number of bytes copied.
257 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
265 len = pl2303_buf_space_avail(pb);
272 len = pb->buf_buf + pb->buf_size - pb->buf_put;
274 memcpy(pb->buf_put, buf, len);
275 memcpy(pb->buf_buf, buf+len, count - len);
276 pb->buf_put = pb->buf_buf + count - len;
278 memcpy(pb->buf_put, buf, count);
280 pb->buf_put += count;
281 else /* count == len */
282 pb->buf_put = pb->buf_buf;
291 * Get data from the circular buffer and copy to the given buffer.
292 * Restrict to the amount of data available.
294 * Return the number of bytes copied.
296 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
304 len = pl2303_buf_data_avail(pb);
311 len = pb->buf_buf + pb->buf_size - pb->buf_get;
313 memcpy(buf, pb->buf_get, len);
314 memcpy(buf+len, pb->buf_buf, count - len);
315 pb->buf_get = pb->buf_buf + count - len;
317 memcpy(buf, pb->buf_get, count);
319 pb->buf_get += count;
320 else /* count == len */
321 pb->buf_get = pb->buf_buf;
327 static int pl2303_vendor_read(__u16 value, __u16 index,
328 struct usb_serial *serial, unsigned char *buf)
330 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
331 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
332 value, index, buf, 1, 100);
333 dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE,
334 VENDOR_READ_REQUEST, value, index, res, buf[0]);
338 static int pl2303_vendor_write(__u16 value, __u16 index,
339 struct usb_serial *serial)
341 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
342 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
343 value, index, NULL, 0, 100);
344 dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE,
345 VENDOR_WRITE_REQUEST, value, index, res);
349 static int pl2303_startup(struct usb_serial *serial)
351 struct pl2303_private *priv;
352 enum pl2303_type type = type_0;
356 buf = kmalloc(10, GFP_KERNEL);
360 if (serial->dev->descriptor.bDeviceClass == 0x02)
362 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
364 else if (serial->dev->descriptor.bDeviceClass == 0x00)
366 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
368 dbg("device type: %d", type);
370 for (i = 0; i < serial->num_ports; ++i) {
371 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
374 spin_lock_init(&priv->lock);
375 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
376 if (priv->buf == NULL) {
380 init_waitqueue_head(&priv->delta_msr_wait);
382 usb_set_serial_port_data(serial->port[i], priv);
385 pl2303_vendor_read(0x8484, 0, serial, buf);
386 pl2303_vendor_write(0x0404, 0, serial);
387 pl2303_vendor_read(0x8484, 0, serial, buf);
388 pl2303_vendor_read(0x8383, 0, serial, buf);
389 pl2303_vendor_read(0x8484, 0, serial, buf);
390 pl2303_vendor_write(0x0404, 1, serial);
391 pl2303_vendor_read(0x8484, 0, serial, buf);
392 pl2303_vendor_read(0x8383, 0, serial, buf);
393 pl2303_vendor_write(0, 1, serial);
394 pl2303_vendor_write(1, 0, serial);
396 pl2303_vendor_write(2, 0x44, serial);
398 pl2303_vendor_write(2, 0x24, serial);
405 for (--i; i >= 0; --i) {
406 priv = usb_get_serial_port_data(serial->port[i]);
407 pl2303_buf_free(priv->buf);
409 usb_set_serial_port_data(serial->port[i], NULL);
414 static int set_control_lines(struct usb_device *dev, u8 value)
418 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
419 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
420 value, 0, NULL, 0, 100);
421 dbg("%s - value = %d, retval = %d", __func__, value, retval);
425 static void pl2303_send(struct usb_serial_port *port)
428 struct pl2303_private *priv = usb_get_serial_port_data(port);
431 dbg("%s - port %d", __func__, port->number);
433 spin_lock_irqsave(&priv->lock, flags);
435 if (priv->write_urb_in_use) {
436 spin_unlock_irqrestore(&priv->lock, flags);
440 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
441 port->bulk_out_size);
444 spin_unlock_irqrestore(&priv->lock, flags);
448 priv->write_urb_in_use = 1;
450 spin_unlock_irqrestore(&priv->lock, flags);
452 usb_serial_debug_data(debug, &port->dev, __func__, count,
453 port->write_urb->transfer_buffer);
455 port->write_urb->transfer_buffer_length = count;
456 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
458 dev_err(&port->dev, "%s - failed submitting write urb,"
459 " error %d\n", __func__, result);
460 priv->write_urb_in_use = 0;
461 /* TODO: reschedule pl2303_send */
464 usb_serial_port_softint(port);
467 static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port,
468 const unsigned char *buf, int count)
470 struct pl2303_private *priv = usb_get_serial_port_data(port);
473 dbg("%s - port %d, %d bytes", __func__, port->number, count);
478 spin_lock_irqsave(&priv->lock, flags);
479 count = pl2303_buf_put(priv->buf, buf, count);
480 spin_unlock_irqrestore(&priv->lock, flags);
487 static int pl2303_write_room(struct tty_struct *tty)
489 struct usb_serial_port *port = tty->driver_data;
490 struct pl2303_private *priv = usb_get_serial_port_data(port);
494 dbg("%s - port %d", __func__, port->number);
496 spin_lock_irqsave(&priv->lock, flags);
497 room = pl2303_buf_space_avail(priv->buf);
498 spin_unlock_irqrestore(&priv->lock, flags);
500 dbg("%s - returns %d", __func__, room);
504 static int pl2303_chars_in_buffer(struct tty_struct *tty)
506 struct usb_serial_port *port = tty->driver_data;
507 struct pl2303_private *priv = usb_get_serial_port_data(port);
511 dbg("%s - port %d", __func__, port->number);
513 spin_lock_irqsave(&priv->lock, flags);
514 chars = pl2303_buf_data_avail(priv->buf);
515 spin_unlock_irqrestore(&priv->lock, flags);
517 dbg("%s - returns %d", __func__, chars);
521 static void pl2303_set_termios(struct tty_struct *tty,
522 struct usb_serial_port *port, struct ktermios *old_termios)
524 struct usb_serial *serial = port->serial;
525 struct pl2303_private *priv = usb_get_serial_port_data(port);
532 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
533 4800, 7200, 9600, 14400, 19200, 28800, 38400,
534 57600, 115200, 230400, 460800, 614400,
535 921600, 1228800, 2457600, 3000000, 6000000 };
536 int baud_floor, baud_ceil;
539 dbg("%s - port %d", __func__, port->number);
541 /* The PL2303 is reported to lose bytes if you change
542 serial settings even to the same values as before. Thus
543 we actually need to filter in this specific case */
545 if (!tty_termios_hw_change(tty->termios, old_termios))
548 cflag = tty->termios->c_cflag;
550 buf = kzalloc(7, GFP_KERNEL);
552 dev_err(&port->dev, "%s - out of memory.\n", __func__);
553 /* Report back no change occurred */
554 *tty->termios = *old_termios;
558 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
559 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
561 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
562 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
565 switch (cflag & CSIZE) {
580 dbg("%s - data bits = %d", __func__, buf[6]);
583 /* For reference buf[0]:buf[3] baud rate value */
584 /* NOTE: Only the values defined in baud_sup are supported !
585 * => if unsupported values are set, the PL2303 seems to use
586 * 9600 baud (at least my PL2303X always does)
588 baud = tty_get_baud_rate(tty);
589 dbg("%s - baud requested = %d", __func__, baud);
591 /* Set baudrate to nearest supported value */
592 for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
593 if (baud_sup[k] / baud) {
594 baud_ceil = baud_sup[k];
598 baud_floor = baud_sup[k-1];
599 if ((baud_ceil % baud)
600 > (baud % baud_floor))
608 if (baud > 1228800) {
609 /* type_0, type_1 only support up to 1228800 baud */
610 if (priv->type != HX)
612 else if (baud > 6000000)
615 dbg("%s - baud set = %d", __func__, baud);
616 buf[0] = baud & 0xff;
617 buf[1] = (baud >> 8) & 0xff;
618 buf[2] = (baud >> 16) & 0xff;
619 buf[3] = (baud >> 24) & 0xff;
622 /* For reference buf[4]=0 is 1 stop bits */
623 /* For reference buf[4]=1 is 1.5 stop bits */
624 /* For reference buf[4]=2 is 2 stop bits */
625 if (cflag & CSTOPB) {
626 /* NOTE: Comply with "real" UARTs / RS232:
627 * use 1.5 instead of 2 stop bits with 5 data bits
629 if ((cflag & CSIZE) == CS5) {
631 dbg("%s - stop bits = 1.5", __func__);
634 dbg("%s - stop bits = 2", __func__);
638 dbg("%s - stop bits = 1", __func__);
641 if (cflag & PARENB) {
642 /* For reference buf[5]=0 is none parity */
643 /* For reference buf[5]=1 is odd parity */
644 /* For reference buf[5]=2 is even parity */
645 /* For reference buf[5]=3 is mark parity */
646 /* For reference buf[5]=4 is space parity */
647 if (cflag & PARODD) {
648 if (cflag & CMSPAR) {
650 dbg("%s - parity = mark", __func__);
653 dbg("%s - parity = odd", __func__);
656 if (cflag & CMSPAR) {
658 dbg("%s - parity = space", __func__);
661 dbg("%s - parity = even", __func__);
666 dbg("%s - parity = none", __func__);
669 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
670 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
672 dbg("0x21:0x20:0:0 %d", i);
674 /* change control lines if we are switching to or from B0 */
675 spin_lock_irqsave(&priv->lock, flags);
676 control = priv->line_control;
677 if ((cflag & CBAUD) == B0)
678 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
680 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
681 if (control != priv->line_control) {
682 control = priv->line_control;
683 spin_unlock_irqrestore(&priv->lock, flags);
684 set_control_lines(serial->dev, control);
686 spin_unlock_irqrestore(&priv->lock, flags);
689 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
691 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
692 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
694 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
695 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
697 if (cflag & CRTSCTS) {
698 if (priv->type == HX)
699 pl2303_vendor_write(0x0, 0x61, serial);
701 pl2303_vendor_write(0x0, 0x41, serial);
703 pl2303_vendor_write(0x0, 0x0, serial);
706 /* Save resulting baud rate */
708 tty_encode_baud_rate(tty, baud, baud);
713 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
715 struct pl2303_private *priv = usb_get_serial_port_data(port);
719 spin_lock_irqsave(&priv->lock, flags);
720 /* Change DTR and RTS */
722 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
724 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
725 control = priv->line_control;
726 spin_unlock_irqrestore(&priv->lock, flags);
727 set_control_lines(port->serial->dev, control);
730 static void pl2303_close(struct usb_serial_port *port)
732 struct pl2303_private *priv = usb_get_serial_port_data(port);
735 dbg("%s - port %d", __func__, port->number);
737 spin_lock_irqsave(&priv->lock, flags);
738 /* clear out any remaining data in the buffer */
739 pl2303_buf_clear(priv->buf);
740 spin_unlock_irqrestore(&priv->lock, flags);
742 /* shutdown our urbs */
743 dbg("%s - shutting down urbs", __func__);
744 usb_kill_urb(port->write_urb);
745 usb_kill_urb(port->read_urb);
746 usb_kill_urb(port->interrupt_in_urb);
750 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
752 struct ktermios tmp_termios;
753 struct usb_serial *serial = port->serial;
754 struct pl2303_private *priv = usb_get_serial_port_data(port);
757 dbg("%s - port %d", __func__, port->number);
759 if (priv->type != HX) {
760 usb_clear_halt(serial->dev, port->write_urb->pipe);
761 usb_clear_halt(serial->dev, port->read_urb->pipe);
763 /* reset upstream data pipes */
764 pl2303_vendor_write(8, 0, serial);
765 pl2303_vendor_write(9, 0, serial);
770 pl2303_set_termios(tty, port, &tmp_termios);
772 dbg("%s - submitting read urb", __func__);
773 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
775 dev_err(&port->dev, "%s - failed submitting read urb,"
776 " error %d\n", __func__, result);
781 dbg("%s - submitting interrupt urb", __func__);
782 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
784 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
785 " error %d\n", __func__, result);
789 port->port.drain_delay = 256;
793 static int pl2303_tiocmset(struct tty_struct *tty, struct file *file,
794 unsigned int set, unsigned int clear)
796 struct usb_serial_port *port = tty->driver_data;
797 struct pl2303_private *priv = usb_get_serial_port_data(port);
801 if (!usb_get_intfdata(port->serial->interface))
804 spin_lock_irqsave(&priv->lock, flags);
806 priv->line_control |= CONTROL_RTS;
808 priv->line_control |= CONTROL_DTR;
809 if (clear & TIOCM_RTS)
810 priv->line_control &= ~CONTROL_RTS;
811 if (clear & TIOCM_DTR)
812 priv->line_control &= ~CONTROL_DTR;
813 control = priv->line_control;
814 spin_unlock_irqrestore(&priv->lock, flags);
816 return set_control_lines(port->serial->dev, control);
819 static int pl2303_tiocmget(struct tty_struct *tty, struct file *file)
821 struct usb_serial_port *port = tty->driver_data;
822 struct pl2303_private *priv = usb_get_serial_port_data(port);
828 dbg("%s (%d)", __func__, port->number);
830 if (!usb_get_intfdata(port->serial->interface))
833 spin_lock_irqsave(&priv->lock, flags);
834 mcr = priv->line_control;
835 status = priv->line_status;
836 spin_unlock_irqrestore(&priv->lock, flags);
838 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
839 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
840 | ((status & UART_CTS) ? TIOCM_CTS : 0)
841 | ((status & UART_DSR) ? TIOCM_DSR : 0)
842 | ((status & UART_RING) ? TIOCM_RI : 0)
843 | ((status & UART_DCD) ? TIOCM_CD : 0);
845 dbg("%s - result = %x", __func__, result);
850 static int pl2303_carrier_raised(struct usb_serial_port *port)
852 struct pl2303_private *priv = usb_get_serial_port_data(port);
853 if (priv->line_status & UART_DCD)
858 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
860 struct pl2303_private *priv = usb_get_serial_port_data(port);
862 unsigned int prevstatus;
864 unsigned int changed;
866 spin_lock_irqsave(&priv->lock, flags);
867 prevstatus = priv->line_status;
868 spin_unlock_irqrestore(&priv->lock, flags);
871 interruptible_sleep_on(&priv->delta_msr_wait);
872 /* see if a signal did it */
873 if (signal_pending(current))
876 spin_lock_irqsave(&priv->lock, flags);
877 status = priv->line_status;
878 spin_unlock_irqrestore(&priv->lock, flags);
880 changed = prevstatus ^ status;
882 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
883 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
884 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
885 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
894 static int pl2303_ioctl(struct tty_struct *tty, struct file *file,
895 unsigned int cmd, unsigned long arg)
897 struct serial_struct ser;
898 struct usb_serial_port *port = tty->driver_data;
899 dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
903 memset(&ser, 0, sizeof ser);
904 ser.type = PORT_16654;
905 ser.line = port->serial->minor;
906 ser.port = port->number;
907 ser.baud_base = 460800;
909 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
915 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
916 return wait_modem_info(port, arg);
918 dbg("%s not supported = 0x%04x", __func__, cmd);
924 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
926 struct usb_serial_port *port = tty->driver_data;
927 struct usb_serial *serial = port->serial;
931 dbg("%s - port %d", __func__, port->number);
933 if (break_state == 0)
937 dbg("%s - turning break %s", __func__,
938 state == BREAK_OFF ? "off" : "on");
940 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
941 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
944 dbg("%s - error sending break = %d", __func__, result);
947 static void pl2303_release(struct usb_serial *serial)
950 struct pl2303_private *priv;
954 for (i = 0; i < serial->num_ports; ++i) {
955 priv = usb_get_serial_port_data(serial->port[i]);
957 pl2303_buf_free(priv->buf);
963 static void pl2303_update_line_status(struct usb_serial_port *port,
965 unsigned int actual_length)
968 struct pl2303_private *priv = usb_get_serial_port_data(port);
970 u8 status_idx = UART_STATE;
971 u8 length = UART_STATE + 1;
974 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
975 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
978 if (idv == SIEMENS_VENDOR_ID) {
979 if (idp == SIEMENS_PRODUCT_ID_X65 ||
980 idp == SIEMENS_PRODUCT_ID_SX1 ||
981 idp == SIEMENS_PRODUCT_ID_X75) {
988 if (actual_length < length)
991 /* Save off the uart status for others to look at */
992 spin_lock_irqsave(&priv->lock, flags);
993 priv->line_status = data[status_idx];
994 spin_unlock_irqrestore(&priv->lock, flags);
995 if (priv->line_status & UART_BREAK_ERROR)
996 usb_serial_handle_break(port);
997 wake_up_interruptible(&priv->delta_msr_wait);
1000 static void pl2303_read_int_callback(struct urb *urb)
1002 struct usb_serial_port *port = urb->context;
1003 unsigned char *data = urb->transfer_buffer;
1004 unsigned int actual_length = urb->actual_length;
1005 int status = urb->status;
1008 dbg("%s (%d)", __func__, port->number);
1017 /* this urb is terminated, clean up */
1018 dbg("%s - urb shutting down with status: %d", __func__,
1022 dbg("%s - nonzero urb status received: %d", __func__,
1027 usb_serial_debug_data(debug, &port->dev, __func__,
1028 urb->actual_length, urb->transfer_buffer);
1030 pl2303_update_line_status(port, data, actual_length);
1033 retval = usb_submit_urb(urb, GFP_ATOMIC);
1035 dev_err(&urb->dev->dev,
1036 "%s - usb_submit_urb failed with result %d\n",
1040 static void pl2303_push_data(struct tty_struct *tty,
1041 struct usb_serial_port *port, struct urb *urb,
1044 unsigned char *data = urb->transfer_buffer;
1045 /* get tty_flag from status */
1046 char tty_flag = TTY_NORMAL;
1047 /* break takes precedence over parity, */
1048 /* which takes precedence over framing errors */
1049 if (line_status & UART_BREAK_ERROR)
1050 tty_flag = TTY_BREAK;
1051 else if (line_status & UART_PARITY_ERROR)
1052 tty_flag = TTY_PARITY;
1053 else if (line_status & UART_FRAME_ERROR)
1054 tty_flag = TTY_FRAME;
1055 dbg("%s - tty_flag = %d", __func__, tty_flag);
1057 /* overrun is special, not associated with a char */
1058 if (line_status & UART_OVERRUN_ERROR)
1059 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1061 if (tty_flag == TTY_NORMAL && !(port->console && port->sysrq))
1062 tty_insert_flip_string(tty, data, urb->actual_length);
1065 for (i = 0; i < urb->actual_length; ++i)
1066 if (!usb_serial_handle_sysrq_char(tty, port, data[i]))
1067 tty_insert_flip_char(tty, data[i], tty_flag);
1069 tty_flip_buffer_push(tty);
1072 static void pl2303_read_bulk_callback(struct urb *urb)
1074 struct usb_serial_port *port = urb->context;
1075 struct pl2303_private *priv = usb_get_serial_port_data(port);
1076 struct tty_struct *tty;
1077 unsigned long flags;
1079 int status = urb->status;
1082 dbg("%s - port %d", __func__, port->number);
1085 dbg("%s - urb status = %d", __func__, status);
1086 if (status == -EPROTO) {
1087 /* PL2303 mysteriously fails with -EPROTO reschedule
1089 dbg("%s - caught -EPROTO, resubmitting the urb",
1091 result = usb_submit_urb(urb, GFP_ATOMIC);
1093 dev_err(&urb->dev->dev, "%s - failed"
1094 " resubmitting read urb, error %d\n",
1098 dbg("%s - unable to handle the error, exiting.", __func__);
1102 usb_serial_debug_data(debug, &port->dev, __func__,
1103 urb->actual_length, urb->transfer_buffer);
1105 spin_lock_irqsave(&priv->lock, flags);
1106 line_status = priv->line_status;
1107 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
1108 spin_unlock_irqrestore(&priv->lock, flags);
1109 wake_up_interruptible(&priv->delta_msr_wait);
1111 tty = tty_port_tty_get(&port->port);
1112 if (tty && urb->actual_length) {
1113 pl2303_push_data(tty, port, urb, line_status);
1116 /* Schedule the next read _if_ we are still open */
1117 result = usb_submit_urb(urb, GFP_ATOMIC);
1118 if (result && result != -EPERM)
1119 dev_err(&urb->dev->dev, "%s - failed resubmitting"
1120 " read urb, error %d\n", __func__, result);
1123 static void pl2303_write_bulk_callback(struct urb *urb)
1125 struct usb_serial_port *port = urb->context;
1126 struct pl2303_private *priv = usb_get_serial_port_data(port);
1128 int status = urb->status;
1130 dbg("%s - port %d", __func__, port->number);
1139 /* this urb is terminated, clean up */
1140 dbg("%s - urb shutting down with status: %d", __func__,
1142 priv->write_urb_in_use = 0;
1145 /* error in the urb, so we have to resubmit it */
1146 dbg("%s - Overflow in write", __func__);
1147 dbg("%s - nonzero write bulk status received: %d", __func__,
1149 port->write_urb->transfer_buffer_length = 1;
1150 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1152 dev_err(&urb->dev->dev, "%s - failed resubmitting write"
1153 " urb, error %d\n", __func__, result);
1158 priv->write_urb_in_use = 0;
1160 /* send any buffered data */
1164 /* All of the device info needed for the PL2303 SIO serial converter */
1165 static struct usb_serial_driver pl2303_device = {
1167 .owner = THIS_MODULE,
1170 .id_table = id_table,
1171 .usb_driver = &pl2303_driver,
1173 .open = pl2303_open,
1174 .close = pl2303_close,
1175 .dtr_rts = pl2303_dtr_rts,
1176 .carrier_raised = pl2303_carrier_raised,
1177 .write = pl2303_write,
1178 .ioctl = pl2303_ioctl,
1179 .break_ctl = pl2303_break_ctl,
1180 .set_termios = pl2303_set_termios,
1181 .tiocmget = pl2303_tiocmget,
1182 .tiocmset = pl2303_tiocmset,
1183 .read_bulk_callback = pl2303_read_bulk_callback,
1184 .read_int_callback = pl2303_read_int_callback,
1185 .write_bulk_callback = pl2303_write_bulk_callback,
1186 .write_room = pl2303_write_room,
1187 .chars_in_buffer = pl2303_chars_in_buffer,
1188 .attach = pl2303_startup,
1189 .release = pl2303_release,
1192 static int __init pl2303_init(void)
1196 retval = usb_serial_register(&pl2303_device);
1198 goto failed_usb_serial_register;
1199 retval = usb_register(&pl2303_driver);
1201 goto failed_usb_register;
1202 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1204 failed_usb_register:
1205 usb_serial_deregister(&pl2303_device);
1206 failed_usb_serial_register:
1210 static void __exit pl2303_exit(void)
1212 usb_deregister(&pl2303_driver);
1213 usb_serial_deregister(&pl2303_device);
1216 module_init(pl2303_init);
1217 module_exit(pl2303_exit);
1219 MODULE_DESCRIPTION(DRIVER_DESC);
1220 MODULE_LICENSE("GPL");
1222 module_param(debug, bool, S_IRUGO | S_IWUSR);
1223 MODULE_PARM_DESC(debug, "Debug enabled or not");