cp210x.c (31271e9aacaa3c3460cbad8ec62fb5a04a522f5b) cp210x.c (4f2ab8887479bef2204878ed6d633a515a3e6a0d)
1/*
2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
3 *
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.

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30#define DRIVER_VERSION "v0.09"
31#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
32
33/*
34 * Function Prototypes
35 */
36static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
37static void cp210x_close(struct usb_serial_port *);
1/*
2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
3 *
4 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.

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30#define DRIVER_VERSION "v0.09"
31#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
32
33/*
34 * Function Prototypes
35 */
36static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
37static void cp210x_close(struct usb_serial_port *);
38static void cp210x_get_termios(struct tty_struct *,
39 struct usb_serial_port *port);
38static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
40static void cp210x_get_termios_port(struct usb_serial_port *port,
41 unsigned int *cflagp, unsigned int *baudp);
42static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
43 struct ktermios *);
44static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
45 struct ktermios*);
46static int cp210x_tiocmget(struct tty_struct *);
47static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);

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164
165struct cp210x_serial_private {
166 __u8 bInterfaceNumber;
167};
168
169static struct usb_serial_driver cp210x_device = {
170 .driver = {
171 .owner = THIS_MODULE,
39static void cp210x_get_termios_port(struct usb_serial_port *port,
40 unsigned int *cflagp, unsigned int *baudp);
41static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
42 struct ktermios *);
43static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
44 struct ktermios*);
45static int cp210x_tiocmget(struct tty_struct *);
46static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);

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163
164struct cp210x_serial_private {
165 __u8 bInterfaceNumber;
166};
167
168static struct usb_serial_driver cp210x_device = {
169 .driver = {
170 .owner = THIS_MODULE,
172 .name = "cp210x",
171 .name = "cp210x",
173 },
174 .id_table = id_table,
175 .num_ports = 1,
176 .bulk_in_size = 256,
177 .bulk_out_size = 256,
178 .open = cp210x_open,
179 .close = cp210x_close,
180 .break_ctl = cp210x_break_ctl,
181 .set_termios = cp210x_set_termios,
172 },
173 .id_table = id_table,
174 .num_ports = 1,
175 .bulk_in_size = 256,
176 .bulk_out_size = 256,
177 .open = cp210x_open,
178 .close = cp210x_close,
179 .break_ctl = cp210x_break_ctl,
180 .set_termios = cp210x_set_termios,
182 .tiocmget = cp210x_tiocmget,
181 .tiocmget = cp210x_tiocmget,
183 .tiocmset = cp210x_tiocmset,
184 .attach = cp210x_startup,
185 .release = cp210x_release,
186 .dtr_rts = cp210x_dtr_rts
187};
188
189static struct usb_serial_driver * const serial_drivers[] = {
190 &cp210x_device, NULL

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276 unsigned int *data, int size)
277{
278 struct usb_serial *serial = port->serial;
279 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
280 __le32 *buf;
281 int result, i, length;
282
283 /* Number of integers required to contain the array */
182 .tiocmset = cp210x_tiocmset,
183 .attach = cp210x_startup,
184 .release = cp210x_release,
185 .dtr_rts = cp210x_dtr_rts
186};
187
188static struct usb_serial_driver * const serial_drivers[] = {
189 &cp210x_device, NULL

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275 unsigned int *data, int size)
276{
277 struct usb_serial *serial = port->serial;
278 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
279 __le32 *buf;
280 int result, i, length;
281
282 /* Number of integers required to contain the array */
284 length = (((size - 1) | 3) + 1)/4;
283 length = (((size - 1) | 3) + 1) / 4;
285
286 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
287 if (!buf) {
288 dev_err(&port->dev, "%s - out of memory.\n", __func__);
289 return -ENOMEM;
290 }
291
292 /* Issue the request, attempting to read 'size' bytes */

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323 unsigned int *data, int size)
324{
325 struct usb_serial *serial = port->serial;
326 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
327 __le32 *buf;
328 int result, i, length;
329
330 /* Number of integers required to contain the array */
284
285 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
286 if (!buf) {
287 dev_err(&port->dev, "%s - out of memory.\n", __func__);
288 return -ENOMEM;
289 }
290
291 /* Issue the request, attempting to read 'size' bytes */

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322 unsigned int *data, int size)
323{
324 struct usb_serial *serial = port->serial;
325 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
326 __le32 *buf;
327 int result, i, length;
328
329 /* Number of integers required to contain the array */
331 length = (((size - 1) | 3) + 1)/4;
330 length = (((size - 1) | 3) + 1) / 4;
332
333 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
334 if (!buf) {
331
332 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
333 if (!buf) {
335 dev_err(&port->dev, "%s - out of memory.\n",
336 __func__);
334 dev_err(&port->dev, "%s - out of memory.\n", __func__);
337 return -ENOMEM;
338 }
339
340 /* Array of integers into bytes */
341 for (i = 0; i < length; i++)
342 buf[i] = cpu_to_le32(data[i]);
343
344 if (size > 2) {

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379{
380 return cp210x_set_config(port, request, &data, 2);
381}
382
383/*
384 * cp210x_quantise_baudrate
385 * Quantises the baud rate as per AN205 Table 1
386 */
335 return -ENOMEM;
336 }
337
338 /* Array of integers into bytes */
339 for (i = 0; i < length; i++)
340 buf[i] = cpu_to_le32(data[i]);
341
342 if (size > 2) {

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377{
378 return cp210x_set_config(port, request, &data, 2);
379}
380
381/*
382 * cp210x_quantise_baudrate
383 * Quantises the baud rate as per AN205 Table 1
384 */
387static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
385static unsigned int cp210x_quantise_baudrate(unsigned int baud)
386{
388 if (baud <= 300)
389 baud = 300;
390 else if (baud <= 600) baud = 600;
391 else if (baud <= 1200) baud = 1200;
392 else if (baud <= 1800) baud = 1800;
393 else if (baud <= 2400) baud = 2400;
394 else if (baud <= 4000) baud = 4000;
395 else if (baud <= 4803) baud = 4800;

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462 struct usb_serial_port *port)
463{
464 unsigned int baud;
465
466 if (tty) {
467 cp210x_get_termios_port(tty->driver_data,
468 &tty->termios.c_cflag, &baud);
469 tty_encode_baud_rate(tty, baud, baud);
387 if (baud <= 300)
388 baud = 300;
389 else if (baud <= 600) baud = 600;
390 else if (baud <= 1200) baud = 1200;
391 else if (baud <= 1800) baud = 1800;
392 else if (baud <= 2400) baud = 2400;
393 else if (baud <= 4000) baud = 4000;
394 else if (baud <= 4803) baud = 4800;

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461 struct usb_serial_port *port)
462{
463 unsigned int baud;
464
465 if (tty) {
466 cp210x_get_termios_port(tty->driver_data,
467 &tty->termios.c_cflag, &baud);
468 tty_encode_baud_rate(tty, baud, baud);
470 }
471
472 else {
469 } else {
473 unsigned int cflag;
474 cflag = 0;
475 cp210x_get_termios_port(port, &cflag, &baud);
476 }
477}
478
479/*
480 * cp210x_get_termios_port

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688 dev_dbg(dev, "%s - data bits = 8\n", __func__);
689 break;
690 /*case CS9:
691 bits |= BITS_DATA_9;
692 dev_dbg(dev, "%s - data bits = 9\n", __func__);
693 break;*/
694 default:
695 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
470 unsigned int cflag;
471 cflag = 0;
472 cp210x_get_termios_port(port, &cflag, &baud);
473 }
474}
475
476/*
477 * cp210x_get_termios_port

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685 dev_dbg(dev, "%s - data bits = 8\n", __func__);
686 break;
687 /*case CS9:
688 bits |= BITS_DATA_9;
689 dev_dbg(dev, "%s - data bits = 9\n", __func__);
690 break;*/
691 default:
692 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
696 bits |= BITS_DATA_8;
697 break;
693 bits |= BITS_DATA_8;
694 break;
698 }
699 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
700 dev_dbg(dev, "Number of data bits requested not supported by device\n");
701 }
702
703 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
704 (old_cflag & (PARENB|PARODD|CMSPAR))) {
705 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);

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762 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
763 __func__, modem_ctl[0], modem_ctl[1],
764 modem_ctl[2], modem_ctl[3]);
765 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
766 }
767
768}
769
695 }
696 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
697 dev_dbg(dev, "Number of data bits requested not supported by device\n");
698 }
699
700 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
701 (old_cflag & (PARENB|PARODD|CMSPAR))) {
702 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);

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759 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
760 __func__, modem_ctl[0], modem_ctl[1],
761 modem_ctl[2], modem_ctl[3]);
762 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
763 }
764
765}
766
770static int cp210x_tiocmset (struct tty_struct *tty,
767static int cp210x_tiocmset(struct tty_struct *tty,
771 unsigned int set, unsigned int clear)
772{
773 struct usb_serial_port *port = tty->driver_data;
774 return cp210x_tiocmset_port(port, set, clear);
775}
776
777static int cp210x_tiocmset_port(struct usb_serial_port *port,
778 unsigned int set, unsigned int clear)

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804static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
805{
806 if (on)
807 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
808 else
809 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
810}
811
768 unsigned int set, unsigned int clear)
769{
770 struct usb_serial_port *port = tty->driver_data;
771 return cp210x_tiocmset_port(port, set, clear);
772}
773
774static int cp210x_tiocmset_port(struct usb_serial_port *port,
775 unsigned int set, unsigned int clear)

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801static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
802{
803 if (on)
804 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
805 else
806 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
807}
808
812static int cp210x_tiocmget (struct tty_struct *tty)
809static int cp210x_tiocmget(struct tty_struct *tty)
813{
814 struct usb_serial_port *port = tty->driver_data;
815 unsigned int control;
816 int result;
817
818 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
819
820 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
821 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
822 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
823 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
824 |((control & CONTROL_RING)? TIOCM_RI : 0)
825 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
826
827 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
828
829 return result;
830}
831
810{
811 struct usb_serial_port *port = tty->driver_data;
812 unsigned int control;
813 int result;
814
815 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
816
817 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
818 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
819 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
820 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
821 |((control & CONTROL_RING)? TIOCM_RI : 0)
822 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
823
824 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
825
826 return result;
827}
828
832static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
829static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
833{
834 struct usb_serial_port *port = tty->driver_data;
835 unsigned int state;
836
837 if (break_state == 0)
838 state = BREAK_OFF;
839 else
840 state = BREAK_ON;

--- 38 unchanged lines hidden --- 		830{
831 struct usb_serial_port *port = tty->driver_data;
832 unsigned int state;
833
834 if (break_state == 0)
835 state = BREAK_OFF;
836 else
837 state = BREAK_ON;

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