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v6.8
  1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 * KLSI KL5KUSB105 chip RS232 converter driver
  4 *
  5 *   Copyright (C) 2010 Johan Hovold <jhovold@gmail.com>
  6 *   Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>
  7 *
  8 * All information about the device was acquired using SniffUSB ans snoopUSB
  9 * on Windows98.
 10 * It was written out of frustration with the PalmConnect USB Serial adapter
 11 * sold by Palm Inc.
 12 * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided
 13 * information that was not already available.
 14 *
 15 * It seems that KLSI bought some silicon-design information from ScanLogic,
 16 * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI.
 17 * KLSI has firmware available for their devices; it is probable that the
 18 * firmware differs from that used by KLSI in their products. If you have an
 19 * original KLSI device and can provide some information on it, I would be
 20 * most interested in adding support for it here. If you have any information
 21 * on the protocol used (or find errors in my reverse-engineered stuff), please
 22 * let me know.
 23 *
 24 * The code was only tested with a PalmConnect USB adapter; if you
 25 * are adventurous, try it with any KLSI-based device and let me know how it
 26 * breaks so that I can fix it!
 27 */
 28
 29/* TODO:
 30 *	check modem line signals
 31 *	implement handshaking or decide that we do not support it
 32 */
 33
 34#include <linux/kernel.h>
 35#include <linux/errno.h>
 36#include <linux/slab.h>
 37#include <linux/tty.h>
 38#include <linux/tty_driver.h>
 39#include <linux/tty_flip.h>
 40#include <linux/module.h>
 41#include <linux/uaccess.h>
 42#include <asm/unaligned.h>
 43#include <linux/usb.h>
 44#include <linux/usb/serial.h>
 45#include "kl5kusb105.h"
 46
 47#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>, Johan Hovold <jhovold@gmail.com>"
 48#define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
 49
 50
 51/*
 52 * Function prototypes
 53 */
 54static int klsi_105_port_probe(struct usb_serial_port *port);
 55static void klsi_105_port_remove(struct usb_serial_port *port);
 56static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);
 57static void klsi_105_close(struct usb_serial_port *port);
 58static void klsi_105_set_termios(struct tty_struct *tty,
 59				 struct usb_serial_port *port,
 60				 const struct ktermios *old_termios);
 61static int  klsi_105_tiocmget(struct tty_struct *tty);
 62static void klsi_105_process_read_urb(struct urb *urb);
 63static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
 64						void *dest, size_t size);
 65
 66/*
 67 * All of the device info needed for the KLSI converters.
 68 */
 69static const struct usb_device_id id_table[] = {
 70	{ USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
 71	{ }		/* Terminating entry */
 72};
 73
 74MODULE_DEVICE_TABLE(usb, id_table);
 75
 76static struct usb_serial_driver kl5kusb105d_device = {
 77	.driver = {
 78		.owner =	THIS_MODULE,
 79		.name =		"kl5kusb105d",
 80	},
 81	.description =		"KL5KUSB105D / PalmConnect",
 82	.id_table =		id_table,
 83	.num_ports =		1,
 84	.bulk_out_size =	64,
 85	.open =			klsi_105_open,
 86	.close =		klsi_105_close,
 87	.set_termios =		klsi_105_set_termios,
 88	.tiocmget =		klsi_105_tiocmget,
 89	.port_probe =		klsi_105_port_probe,
 90	.port_remove =		klsi_105_port_remove,
 91	.throttle =		usb_serial_generic_throttle,
 92	.unthrottle =		usb_serial_generic_unthrottle,
 93	.process_read_urb =	klsi_105_process_read_urb,
 94	.prepare_write_buffer =	klsi_105_prepare_write_buffer,
 95};
 96
 97static struct usb_serial_driver * const serial_drivers[] = {
 98	&kl5kusb105d_device, NULL
 99};
100
101struct klsi_105_port_settings {
102	u8	pktlen;		/* always 5, it seems */
103	u8	baudrate;
104	u8	databits;
105	u8	unknown1;
106	u8	unknown2;
107};
108
109struct klsi_105_private {
110	struct klsi_105_port_settings	cfg;
111	unsigned long			line_state; /* modem line settings */
112	spinlock_t			lock;
113};
114
115
116/*
117 * Handle vendor specific USB requests
118 */
119
120
121#define KLSI_TIMEOUT	 5000 /* default urb timeout */
122
123static int klsi_105_chg_port_settings(struct usb_serial_port *port,
124				      struct klsi_105_port_settings *settings)
125{
126	int rc;
127
128	rc = usb_control_msg_send(port->serial->dev,
129				  0,
130				  KL5KUSB105A_SIO_SET_DATA,
131				  USB_TYPE_VENDOR | USB_DIR_OUT |
132				  USB_RECIP_INTERFACE,
133				  0, /* value */
134				  0, /* index */
135				  settings,
136				  sizeof(struct klsi_105_port_settings),
137				  KLSI_TIMEOUT,
138				  GFP_KERNEL);
139	if (rc)
140		dev_err(&port->dev,
141			"Change port settings failed (error = %d)\n", rc);
142
143	dev_dbg(&port->dev,
144		"pktlen %u, baudrate 0x%02x, databits %u, u1 %u, u2 %u\n",
145		settings->pktlen, settings->baudrate, settings->databits,
146		settings->unknown1, settings->unknown2);
147
148	return rc;
149}
150
 
 
 
 
 
 
 
 
 
 
 
 
151/*
152 * Read line control via vendor command and return result through
153 * the state pointer.
154 */
 
 
155static int klsi_105_get_line_state(struct usb_serial_port *port,
156				   unsigned long *state)
157{
158	u16 status;
159	int rc;
 
 
160
161	rc = usb_control_msg_recv(port->serial->dev, 0,
162				  KL5KUSB105A_SIO_POLL,
163				  USB_TYPE_VENDOR | USB_DIR_IN,
164				  0, /* value */
165				  0, /* index */
166				  &status, sizeof(status),
167				  10000,
168				  GFP_KERNEL);
169	if (rc) {
170		dev_err(&port->dev, "reading line status failed: %d\n", rc);
171		return rc;
172	}
173
174	le16_to_cpus(&status);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
175
176	dev_dbg(&port->dev, "read status %04x\n", status);
 
177
178	*state = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) |
179		 ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0);
180
181	return 0;
 
182}
183
184
185/*
186 * Driver's tty interface functions
187 */
188
189static int klsi_105_port_probe(struct usb_serial_port *port)
190{
191	struct klsi_105_private *priv;
192
193	priv = kmalloc(sizeof(*priv), GFP_KERNEL);
194	if (!priv)
195		return -ENOMEM;
196
197	/* set initial values for control structures */
198	priv->cfg.pktlen    = 5;
199	priv->cfg.baudrate  = kl5kusb105a_sio_b9600;
200	priv->cfg.databits  = kl5kusb105a_dtb_8;
201	priv->cfg.unknown1  = 0;
202	priv->cfg.unknown2  = 1;
203
204	priv->line_state    = 0;
205
206	spin_lock_init(&priv->lock);
207
208	usb_set_serial_port_data(port, priv);
209
210	return 0;
211}
212
213static void klsi_105_port_remove(struct usb_serial_port *port)
214{
215	struct klsi_105_private *priv;
216
217	priv = usb_get_serial_port_data(port);
218	kfree(priv);
 
 
219}
220
221static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
222{
223	struct klsi_105_private *priv = usb_get_serial_port_data(port);
224	int retval = 0;
225	int rc;
226	unsigned long line_state;
227	struct klsi_105_port_settings cfg;
228	unsigned long flags;
229
230	/* Do a defined restart:
231	 * Set up sane default baud rate and send the 'READ_ON'
232	 * vendor command.
233	 * FIXME: set modem line control (how?)
234	 * Then read the modem line control and store values in
235	 * priv->line_state.
236	 */
 
 
 
237
238	cfg.pktlen   = 5;
239	cfg.baudrate = kl5kusb105a_sio_b9600;
240	cfg.databits = kl5kusb105a_dtb_8;
241	cfg.unknown1 = 0;
242	cfg.unknown2 = 1;
243	klsi_105_chg_port_settings(port, &cfg);
244
245	spin_lock_irqsave(&priv->lock, flags);
246	priv->cfg.pktlen   = cfg.pktlen;
247	priv->cfg.baudrate = cfg.baudrate;
248	priv->cfg.databits = cfg.databits;
249	priv->cfg.unknown1 = cfg.unknown1;
250	priv->cfg.unknown2 = cfg.unknown2;
251	spin_unlock_irqrestore(&priv->lock, flags);
252
253	/* READ_ON and urb submission */
254	rc = usb_serial_generic_open(tty, port);
255	if (rc)
256		return rc;
 
 
257
258	rc = usb_control_msg(port->serial->dev,
259			     usb_sndctrlpipe(port->serial->dev, 0),
260			     KL5KUSB105A_SIO_CONFIGURE,
261			     USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
262			     KL5KUSB105A_SIO_CONFIGURE_READ_ON,
263			     0, /* index */
264			     NULL,
265			     0,
266			     KLSI_TIMEOUT);
267	if (rc < 0) {
268		dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
269		retval = rc;
270		goto err_generic_close;
271	} else
272		dev_dbg(&port->dev, "%s - enabled reading\n", __func__);
273
274	rc = klsi_105_get_line_state(port, &line_state);
275	if (rc < 0) {
276		retval = rc;
277		goto err_disable_read;
278	}
279
280	spin_lock_irqsave(&priv->lock, flags);
281	priv->line_state = line_state;
282	spin_unlock_irqrestore(&priv->lock, flags);
283	dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__,
284			line_state);
285
286	return 0;
287
288err_disable_read:
289	usb_control_msg(port->serial->dev,
290			     usb_sndctrlpipe(port->serial->dev, 0),
291			     KL5KUSB105A_SIO_CONFIGURE,
292			     USB_TYPE_VENDOR | USB_DIR_OUT,
293			     KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
294			     0, /* index */
295			     NULL, 0,
296			     KLSI_TIMEOUT);
297err_generic_close:
298	usb_serial_generic_close(port);
 
 
299
300	return retval;
301}
302
303static void klsi_105_close(struct usb_serial_port *port)
304{
305	int rc;
306
307	/* send READ_OFF */
308	rc = usb_control_msg(port->serial->dev,
309			     usb_sndctrlpipe(port->serial->dev, 0),
310			     KL5KUSB105A_SIO_CONFIGURE,
311			     USB_TYPE_VENDOR | USB_DIR_OUT,
312			     KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
313			     0, /* index */
314			     NULL, 0,
315			     KLSI_TIMEOUT);
316	if (rc < 0)
317		dev_err(&port->dev, "failed to disable read: %d\n", rc);
318
319	/* shutdown our bulk reads and writes */
320	usb_serial_generic_close(port);
321}
322
323/* We need to write a complete 64-byte data block and encode the
324 * number actually sent in the first double-byte, LSB-order. That
325 * leaves at most 62 bytes of payload.
326 */
327#define KLSI_HDR_LEN		2
328static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
329						void *dest, size_t size)
330{
331	unsigned char *buf = dest;
332	int count;
333
334	count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size,
335								&port->lock);
336	put_unaligned_le16(count, buf);
337
338	return count + KLSI_HDR_LEN;
339}
340
341/* The data received is preceded by a length double-byte in LSB-first order.
342 */
343static void klsi_105_process_read_urb(struct urb *urb)
344{
345	struct usb_serial_port *port = urb->context;
346	unsigned char *data = urb->transfer_buffer;
347	unsigned len;
348
349	/* empty urbs seem to happen, we ignore them */
350	if (!urb->actual_length)
351		return;
352
353	if (urb->actual_length <= KLSI_HDR_LEN) {
354		dev_dbg(&port->dev, "%s - malformed packet\n", __func__);
355		return;
356	}
357
358	len = get_unaligned_le16(data);
359	if (len > urb->actual_length - KLSI_HDR_LEN) {
360		dev_dbg(&port->dev, "%s - packet length mismatch\n", __func__);
361		len = urb->actual_length - KLSI_HDR_LEN;
362	}
363
364	tty_insert_flip_string(&port->port, data + KLSI_HDR_LEN, len);
365	tty_flip_buffer_push(&port->port);
366}
367
368static void klsi_105_set_termios(struct tty_struct *tty,
369				 struct usb_serial_port *port,
370				 const struct ktermios *old_termios)
371{
372	struct klsi_105_private *priv = usb_get_serial_port_data(port);
373	struct device *dev = &port->dev;
374	unsigned int iflag = tty->termios.c_iflag;
375	unsigned int old_iflag = old_termios->c_iflag;
376	unsigned int cflag = tty->termios.c_cflag;
377	unsigned int old_cflag = old_termios->c_cflag;
378	struct klsi_105_port_settings *cfg;
379	unsigned long flags;
380	speed_t baud;
381
382	cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
383	if (!cfg)
384		return;
385
386	/* lock while we are modifying the settings */
387	spin_lock_irqsave(&priv->lock, flags);
388
389	/*
390	 * Update baud rate
391	 */
392	baud = tty_get_baud_rate(tty);
393
394	switch (baud) {
395	case 0: /* handled below */
396		break;
397	case 1200:
398		priv->cfg.baudrate = kl5kusb105a_sio_b1200;
399		break;
400	case 2400:
401		priv->cfg.baudrate = kl5kusb105a_sio_b2400;
402		break;
403	case 4800:
404		priv->cfg.baudrate = kl5kusb105a_sio_b4800;
405		break;
406	case 9600:
407		priv->cfg.baudrate = kl5kusb105a_sio_b9600;
408		break;
409	case 19200:
410		priv->cfg.baudrate = kl5kusb105a_sio_b19200;
411		break;
412	case 38400:
413		priv->cfg.baudrate = kl5kusb105a_sio_b38400;
414		break;
415	case 57600:
416		priv->cfg.baudrate = kl5kusb105a_sio_b57600;
417		break;
418	case 115200:
419		priv->cfg.baudrate = kl5kusb105a_sio_b115200;
420		break;
421	default:
422		dev_dbg(dev, "unsupported baudrate, using 9600\n");
423		priv->cfg.baudrate = kl5kusb105a_sio_b9600;
424		baud = 9600;
425		break;
426	}
427
428	/*
429	 * FIXME: implement B0 handling
430	 *
431	 * Maybe this should be simulated by sending read disable and read
432	 * enable messages?
433	 */
434
435	tty_encode_baud_rate(tty, baud, baud);
436
437	if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
438		/* set the number of data bits */
439		switch (cflag & CSIZE) {
440		case CS5:
441			dev_dbg(dev, "%s - 5 bits/byte not supported\n", __func__);
442			spin_unlock_irqrestore(&priv->lock, flags);
443			goto err;
444		case CS6:
445			dev_dbg(dev, "%s - 6 bits/byte not supported\n", __func__);
446			spin_unlock_irqrestore(&priv->lock, flags);
447			goto err;
448		case CS7:
449			priv->cfg.databits = kl5kusb105a_dtb_7;
450			break;
451		case CS8:
452			priv->cfg.databits = kl5kusb105a_dtb_8;
453			break;
454		default:
455			dev_err(dev, "CSIZE was not CS5-CS8, using default of 8\n");
456			priv->cfg.databits = kl5kusb105a_dtb_8;
457			break;
458		}
459	}
460
461	/*
462	 * Update line control register (LCR)
463	 */
464	if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
465	    || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
466		/* Not currently supported */
467		tty->termios.c_cflag &= ~(PARENB|PARODD|CSTOPB);
468	}
469	/*
470	 * Set flow control: well, I do not really now how to handle DTR/RTS.
471	 * Just do what we have seen with SniffUSB on Win98.
472	 */
473	if ((iflag & IXOFF) != (old_iflag & IXOFF)
474	    || (iflag & IXON) != (old_iflag & IXON)
475	    ||  (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
476		/* Not currently supported */
477		tty->termios.c_cflag &= ~CRTSCTS;
478	}
479	memcpy(cfg, &priv->cfg, sizeof(*cfg));
480	spin_unlock_irqrestore(&priv->lock, flags);
481
482	/* now commit changes to device */
483	klsi_105_chg_port_settings(port, cfg);
484err:
485	kfree(cfg);
486}
487
488static int klsi_105_tiocmget(struct tty_struct *tty)
489{
490	struct usb_serial_port *port = tty->driver_data;
491	struct klsi_105_private *priv = usb_get_serial_port_data(port);
492	unsigned long flags;
493	int rc;
494	unsigned long line_state;
495
496	rc = klsi_105_get_line_state(port, &line_state);
497	if (rc < 0) {
498		dev_err(&port->dev,
499			"Reading line control failed (error = %d)\n", rc);
500		/* better return value? EAGAIN? */
501		return rc;
502	}
503
504	spin_lock_irqsave(&priv->lock, flags);
505	priv->line_state = line_state;
506	spin_unlock_irqrestore(&priv->lock, flags);
507	dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__, line_state);
508	return (int)line_state;
509}
510
511module_usb_serial_driver(serial_drivers, id_table);
512
513MODULE_AUTHOR(DRIVER_AUTHOR);
514MODULE_DESCRIPTION(DRIVER_DESC);
515MODULE_LICENSE("GPL");
v5.4
  1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 * KLSI KL5KUSB105 chip RS232 converter driver
  4 *
  5 *   Copyright (C) 2010 Johan Hovold <jhovold@gmail.com>
  6 *   Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de>
  7 *
  8 * All information about the device was acquired using SniffUSB ans snoopUSB
  9 * on Windows98.
 10 * It was written out of frustration with the PalmConnect USB Serial adapter
 11 * sold by Palm Inc.
 12 * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided
 13 * information that was not already available.
 14 *
 15 * It seems that KLSI bought some silicon-design information from ScanLogic,
 16 * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI.
 17 * KLSI has firmware available for their devices; it is probable that the
 18 * firmware differs from that used by KLSI in their products. If you have an
 19 * original KLSI device and can provide some information on it, I would be
 20 * most interested in adding support for it here. If you have any information
 21 * on the protocol used (or find errors in my reverse-engineered stuff), please
 22 * let me know.
 23 *
 24 * The code was only tested with a PalmConnect USB adapter; if you
 25 * are adventurous, try it with any KLSI-based device and let me know how it
 26 * breaks so that I can fix it!
 27 */
 28
 29/* TODO:
 30 *	check modem line signals
 31 *	implement handshaking or decide that we do not support it
 32 */
 33
 34#include <linux/kernel.h>
 35#include <linux/errno.h>
 36#include <linux/slab.h>
 37#include <linux/tty.h>
 38#include <linux/tty_driver.h>
 39#include <linux/tty_flip.h>
 40#include <linux/module.h>
 41#include <linux/uaccess.h>
 42#include <asm/unaligned.h>
 43#include <linux/usb.h>
 44#include <linux/usb/serial.h>
 45#include "kl5kusb105.h"
 46
 47#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>, Johan Hovold <jhovold@gmail.com>"
 48#define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver"
 49
 50
 51/*
 52 * Function prototypes
 53 */
 54static int klsi_105_port_probe(struct usb_serial_port *port);
 55static int klsi_105_port_remove(struct usb_serial_port *port);
 56static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);
 57static void klsi_105_close(struct usb_serial_port *port);
 58static void klsi_105_set_termios(struct tty_struct *tty,
 59			struct usb_serial_port *port, struct ktermios *old);
 
 60static int  klsi_105_tiocmget(struct tty_struct *tty);
 61static void klsi_105_process_read_urb(struct urb *urb);
 62static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
 63						void *dest, size_t size);
 64
 65/*
 66 * All of the device info needed for the KLSI converters.
 67 */
 68static const struct usb_device_id id_table[] = {
 69	{ USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) },
 70	{ }		/* Terminating entry */
 71};
 72
 73MODULE_DEVICE_TABLE(usb, id_table);
 74
 75static struct usb_serial_driver kl5kusb105d_device = {
 76	.driver = {
 77		.owner =	THIS_MODULE,
 78		.name =		"kl5kusb105d",
 79	},
 80	.description =		"KL5KUSB105D / PalmConnect",
 81	.id_table =		id_table,
 82	.num_ports =		1,
 83	.bulk_out_size =	64,
 84	.open =			klsi_105_open,
 85	.close =		klsi_105_close,
 86	.set_termios =		klsi_105_set_termios,
 87	.tiocmget =		klsi_105_tiocmget,
 88	.port_probe =		klsi_105_port_probe,
 89	.port_remove =		klsi_105_port_remove,
 90	.throttle =		usb_serial_generic_throttle,
 91	.unthrottle =		usb_serial_generic_unthrottle,
 92	.process_read_urb =	klsi_105_process_read_urb,
 93	.prepare_write_buffer =	klsi_105_prepare_write_buffer,
 94};
 95
 96static struct usb_serial_driver * const serial_drivers[] = {
 97	&kl5kusb105d_device, NULL
 98};
 99
100struct klsi_105_port_settings {
101	u8	pktlen;		/* always 5, it seems */
102	u8	baudrate;
103	u8	databits;
104	u8	unknown1;
105	u8	unknown2;
106};
107
108struct klsi_105_private {
109	struct klsi_105_port_settings	cfg;
110	unsigned long			line_state; /* modem line settings */
111	spinlock_t			lock;
112};
113
114
115/*
116 * Handle vendor specific USB requests
117 */
118
119
120#define KLSI_TIMEOUT	 5000 /* default urb timeout */
121
122static int klsi_105_chg_port_settings(struct usb_serial_port *port,
123				      struct klsi_105_port_settings *settings)
124{
125	int rc;
126
127	rc = usb_control_msg(port->serial->dev,
128			usb_sndctrlpipe(port->serial->dev, 0),
129			KL5KUSB105A_SIO_SET_DATA,
130			USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE,
131			0, /* value */
132			0, /* index */
133			settings,
134			sizeof(struct klsi_105_port_settings),
135			KLSI_TIMEOUT);
136	if (rc < 0)
 
 
137		dev_err(&port->dev,
138			"Change port settings failed (error = %d)\n", rc);
139
140	dev_dbg(&port->dev,
141		"pktlen %u, baudrate 0x%02x, databits %u, u1 %u, u2 %u\n",
142		settings->pktlen, settings->baudrate, settings->databits,
143		settings->unknown1, settings->unknown2);
144
145	return rc;
146}
147
148/* translate a 16-bit status value from the device to linux's TIO bits */
149static unsigned long klsi_105_status2linestate(const __u16 status)
150{
151	unsigned long res = 0;
152
153	res =   ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0)
154	      | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0)
155	      ;
156
157	return res;
158}
159
160/*
161 * Read line control via vendor command and return result through
162 * *line_state_p
163 */
164/* It seems that the status buffer has always only 2 bytes length */
165#define KLSI_STATUSBUF_LEN	2
166static int klsi_105_get_line_state(struct usb_serial_port *port,
167				   unsigned long *line_state_p)
168{
 
169	int rc;
170	u8 *status_buf;
171	__u16 status;
172
173	status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL);
174	if (!status_buf)
175		return -ENOMEM;
 
 
 
 
 
 
 
 
 
176
177	status_buf[0] = 0xff;
178	status_buf[1] = 0xff;
179	rc = usb_control_msg(port->serial->dev,
180			     usb_rcvctrlpipe(port->serial->dev, 0),
181			     KL5KUSB105A_SIO_POLL,
182			     USB_TYPE_VENDOR | USB_DIR_IN,
183			     0, /* value */
184			     0, /* index */
185			     status_buf, KLSI_STATUSBUF_LEN,
186			     10000
187			     );
188	if (rc != KLSI_STATUSBUF_LEN) {
189		dev_err(&port->dev, "reading line status failed: %d\n", rc);
190		if (rc >= 0)
191			rc = -EIO;
192	} else {
193		status = get_unaligned_le16(status_buf);
194
195		dev_dbg(&port->dev, "read status %02x %02x\n",
196			status_buf[0], status_buf[1]);
197
198		*line_state_p = klsi_105_status2linestate(status);
199	}
200
201	kfree(status_buf);
202	return rc;
203}
204
205
206/*
207 * Driver's tty interface functions
208 */
209
210static int klsi_105_port_probe(struct usb_serial_port *port)
211{
212	struct klsi_105_private *priv;
213
214	priv = kmalloc(sizeof(*priv), GFP_KERNEL);
215	if (!priv)
216		return -ENOMEM;
217
218	/* set initial values for control structures */
219	priv->cfg.pktlen    = 5;
220	priv->cfg.baudrate  = kl5kusb105a_sio_b9600;
221	priv->cfg.databits  = kl5kusb105a_dtb_8;
222	priv->cfg.unknown1  = 0;
223	priv->cfg.unknown2  = 1;
224
225	priv->line_state    = 0;
226
227	spin_lock_init(&priv->lock);
228
229	usb_set_serial_port_data(port, priv);
230
231	return 0;
232}
233
234static int klsi_105_port_remove(struct usb_serial_port *port)
235{
236	struct klsi_105_private *priv;
237
238	priv = usb_get_serial_port_data(port);
239	kfree(priv);
240
241	return 0;
242}
243
244static int  klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
245{
246	struct klsi_105_private *priv = usb_get_serial_port_data(port);
247	int retval = 0;
248	int rc;
249	unsigned long line_state;
250	struct klsi_105_port_settings *cfg;
251	unsigned long flags;
252
253	/* Do a defined restart:
254	 * Set up sane default baud rate and send the 'READ_ON'
255	 * vendor command.
256	 * FIXME: set modem line control (how?)
257	 * Then read the modem line control and store values in
258	 * priv->line_state.
259	 */
260	cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
261	if (!cfg)
262		return -ENOMEM;
263
264	cfg->pktlen   = 5;
265	cfg->baudrate = kl5kusb105a_sio_b9600;
266	cfg->databits = kl5kusb105a_dtb_8;
267	cfg->unknown1 = 0;
268	cfg->unknown2 = 1;
269	klsi_105_chg_port_settings(port, cfg);
270
271	spin_lock_irqsave(&priv->lock, flags);
272	priv->cfg.pktlen   = cfg->pktlen;
273	priv->cfg.baudrate = cfg->baudrate;
274	priv->cfg.databits = cfg->databits;
275	priv->cfg.unknown1 = cfg->unknown1;
276	priv->cfg.unknown2 = cfg->unknown2;
277	spin_unlock_irqrestore(&priv->lock, flags);
278
279	/* READ_ON and urb submission */
280	rc = usb_serial_generic_open(tty, port);
281	if (rc) {
282		retval = rc;
283		goto err_free_cfg;
284	}
285
286	rc = usb_control_msg(port->serial->dev,
287			     usb_sndctrlpipe(port->serial->dev, 0),
288			     KL5KUSB105A_SIO_CONFIGURE,
289			     USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE,
290			     KL5KUSB105A_SIO_CONFIGURE_READ_ON,
291			     0, /* index */
292			     NULL,
293			     0,
294			     KLSI_TIMEOUT);
295	if (rc < 0) {
296		dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
297		retval = rc;
298		goto err_generic_close;
299	} else
300		dev_dbg(&port->dev, "%s - enabled reading\n", __func__);
301
302	rc = klsi_105_get_line_state(port, &line_state);
303	if (rc < 0) {
304		retval = rc;
305		goto err_disable_read;
306	}
307
308	spin_lock_irqsave(&priv->lock, flags);
309	priv->line_state = line_state;
310	spin_unlock_irqrestore(&priv->lock, flags);
311	dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__,
312			line_state);
313
314	return 0;
315
316err_disable_read:
317	usb_control_msg(port->serial->dev,
318			     usb_sndctrlpipe(port->serial->dev, 0),
319			     KL5KUSB105A_SIO_CONFIGURE,
320			     USB_TYPE_VENDOR | USB_DIR_OUT,
321			     KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
322			     0, /* index */
323			     NULL, 0,
324			     KLSI_TIMEOUT);
325err_generic_close:
326	usb_serial_generic_close(port);
327err_free_cfg:
328	kfree(cfg);
329
330	return retval;
331}
332
333static void klsi_105_close(struct usb_serial_port *port)
334{
335	int rc;
336
337	/* send READ_OFF */
338	rc = usb_control_msg(port->serial->dev,
339			     usb_sndctrlpipe(port->serial->dev, 0),
340			     KL5KUSB105A_SIO_CONFIGURE,
341			     USB_TYPE_VENDOR | USB_DIR_OUT,
342			     KL5KUSB105A_SIO_CONFIGURE_READ_OFF,
343			     0, /* index */
344			     NULL, 0,
345			     KLSI_TIMEOUT);
346	if (rc < 0)
347		dev_err(&port->dev, "failed to disable read: %d\n", rc);
348
349	/* shutdown our bulk reads and writes */
350	usb_serial_generic_close(port);
351}
352
353/* We need to write a complete 64-byte data block and encode the
354 * number actually sent in the first double-byte, LSB-order. That
355 * leaves at most 62 bytes of payload.
356 */
357#define KLSI_HDR_LEN		2
358static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
359						void *dest, size_t size)
360{
361	unsigned char *buf = dest;
362	int count;
363
364	count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size,
365								&port->lock);
366	put_unaligned_le16(count, buf);
367
368	return count + KLSI_HDR_LEN;
369}
370
371/* The data received is preceded by a length double-byte in LSB-first order.
372 */
373static void klsi_105_process_read_urb(struct urb *urb)
374{
375	struct usb_serial_port *port = urb->context;
376	unsigned char *data = urb->transfer_buffer;
377	unsigned len;
378
379	/* empty urbs seem to happen, we ignore them */
380	if (!urb->actual_length)
381		return;
382
383	if (urb->actual_length <= KLSI_HDR_LEN) {
384		dev_dbg(&port->dev, "%s - malformed packet\n", __func__);
385		return;
386	}
387
388	len = get_unaligned_le16(data);
389	if (len > urb->actual_length - KLSI_HDR_LEN) {
390		dev_dbg(&port->dev, "%s - packet length mismatch\n", __func__);
391		len = urb->actual_length - KLSI_HDR_LEN;
392	}
393
394	tty_insert_flip_string(&port->port, data + KLSI_HDR_LEN, len);
395	tty_flip_buffer_push(&port->port);
396}
397
398static void klsi_105_set_termios(struct tty_struct *tty,
399				 struct usb_serial_port *port,
400				 struct ktermios *old_termios)
401{
402	struct klsi_105_private *priv = usb_get_serial_port_data(port);
403	struct device *dev = &port->dev;
404	unsigned int iflag = tty->termios.c_iflag;
405	unsigned int old_iflag = old_termios->c_iflag;
406	unsigned int cflag = tty->termios.c_cflag;
407	unsigned int old_cflag = old_termios->c_cflag;
408	struct klsi_105_port_settings *cfg;
409	unsigned long flags;
410	speed_t baud;
411
412	cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
413	if (!cfg)
414		return;
415
416	/* lock while we are modifying the settings */
417	spin_lock_irqsave(&priv->lock, flags);
418
419	/*
420	 * Update baud rate
421	 */
422	baud = tty_get_baud_rate(tty);
423
424	switch (baud) {
425	case 0: /* handled below */
426		break;
427	case 1200:
428		priv->cfg.baudrate = kl5kusb105a_sio_b1200;
429		break;
430	case 2400:
431		priv->cfg.baudrate = kl5kusb105a_sio_b2400;
432		break;
433	case 4800:
434		priv->cfg.baudrate = kl5kusb105a_sio_b4800;
435		break;
436	case 9600:
437		priv->cfg.baudrate = kl5kusb105a_sio_b9600;
438		break;
439	case 19200:
440		priv->cfg.baudrate = kl5kusb105a_sio_b19200;
441		break;
442	case 38400:
443		priv->cfg.baudrate = kl5kusb105a_sio_b38400;
444		break;
445	case 57600:
446		priv->cfg.baudrate = kl5kusb105a_sio_b57600;
447		break;
448	case 115200:
449		priv->cfg.baudrate = kl5kusb105a_sio_b115200;
450		break;
451	default:
452		dev_dbg(dev, "unsupported baudrate, using 9600\n");
453		priv->cfg.baudrate = kl5kusb105a_sio_b9600;
454		baud = 9600;
455		break;
456	}
457
458	/*
459	 * FIXME: implement B0 handling
460	 *
461	 * Maybe this should be simulated by sending read disable and read
462	 * enable messages?
463	 */
464
465	tty_encode_baud_rate(tty, baud, baud);
466
467	if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
468		/* set the number of data bits */
469		switch (cflag & CSIZE) {
470		case CS5:
471			dev_dbg(dev, "%s - 5 bits/byte not supported\n", __func__);
472			spin_unlock_irqrestore(&priv->lock, flags);
473			goto err;
474		case CS6:
475			dev_dbg(dev, "%s - 6 bits/byte not supported\n", __func__);
476			spin_unlock_irqrestore(&priv->lock, flags);
477			goto err;
478		case CS7:
479			priv->cfg.databits = kl5kusb105a_dtb_7;
480			break;
481		case CS8:
482			priv->cfg.databits = kl5kusb105a_dtb_8;
483			break;
484		default:
485			dev_err(dev, "CSIZE was not CS5-CS8, using default of 8\n");
486			priv->cfg.databits = kl5kusb105a_dtb_8;
487			break;
488		}
489	}
490
491	/*
492	 * Update line control register (LCR)
493	 */
494	if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))
495	    || (cflag & CSTOPB) != (old_cflag & CSTOPB)) {
496		/* Not currently supported */
497		tty->termios.c_cflag &= ~(PARENB|PARODD|CSTOPB);
498	}
499	/*
500	 * Set flow control: well, I do not really now how to handle DTR/RTS.
501	 * Just do what we have seen with SniffUSB on Win98.
502	 */
503	if ((iflag & IXOFF) != (old_iflag & IXOFF)
504	    || (iflag & IXON) != (old_iflag & IXON)
505	    ||  (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
506		/* Not currently supported */
507		tty->termios.c_cflag &= ~CRTSCTS;
508	}
509	memcpy(cfg, &priv->cfg, sizeof(*cfg));
510	spin_unlock_irqrestore(&priv->lock, flags);
511
512	/* now commit changes to device */
513	klsi_105_chg_port_settings(port, cfg);
514err:
515	kfree(cfg);
516}
517
518static int klsi_105_tiocmget(struct tty_struct *tty)
519{
520	struct usb_serial_port *port = tty->driver_data;
521	struct klsi_105_private *priv = usb_get_serial_port_data(port);
522	unsigned long flags;
523	int rc;
524	unsigned long line_state;
525
526	rc = klsi_105_get_line_state(port, &line_state);
527	if (rc < 0) {
528		dev_err(&port->dev,
529			"Reading line control failed (error = %d)\n", rc);
530		/* better return value? EAGAIN? */
531		return rc;
532	}
533
534	spin_lock_irqsave(&priv->lock, flags);
535	priv->line_state = line_state;
536	spin_unlock_irqrestore(&priv->lock, flags);
537	dev_dbg(&port->dev, "%s - read line state 0x%lx\n", __func__, line_state);
538	return (int)line_state;
539}
540
541module_usb_serial_driver(serial_drivers, id_table);
542
543MODULE_AUTHOR(DRIVER_AUTHOR);
544MODULE_DESCRIPTION(DRIVER_DESC);
545MODULE_LICENSE("GPL");