Commit | Line | Data |
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52af9545 BP |
1 | /* |
2 | * usb-serial driver for Quatech SSU-100 | |
3 | * | |
4 | * based on ftdi_sio.c and the original serqt_usb.c from Quatech | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <linux/errno.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/tty.h> | |
12 | #include <linux/tty_driver.h> | |
13 | #include <linux/tty_flip.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/serial.h> | |
16 | #include <linux/usb.h> | |
17 | #include <linux/usb/serial.h> | |
79f203a2 | 18 | #include <linux/serial_reg.h> |
52af9545 BP |
19 | #include <linux/uaccess.h> |
20 | ||
21 | #define QT_OPEN_CLOSE_CHANNEL 0xca | |
22 | #define QT_SET_GET_DEVICE 0xc2 | |
23 | #define QT_SET_GET_REGISTER 0xc0 | |
24 | #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc | |
25 | #define QT_SET_ATF 0xcd | |
26 | #define QT_GET_SET_UART 0xc1 | |
27 | #define QT_TRANSFER_IN 0xc0 | |
28 | #define QT_HW_FLOW_CONTROL_MASK 0xc5 | |
29 | #define QT_SW_FLOW_CONTROL_MASK 0xc6 | |
30 | ||
52af9545 BP |
31 | #define SERIAL_MSR_MASK 0xf0 |
32 | ||
79f203a2 | 33 | #define SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS) |
52af9545 | 34 | |
79f203a2 | 35 | #define SERIAL_EVEN_PARITY (UART_LCR_PARITY | UART_LCR_EPAR) |
52af9545 BP |
36 | |
37 | #define MAX_BAUD_RATE 460800 | |
38 | ||
39 | #define ATC_DISABLED 0x00 | |
40 | #define DUPMODE_BITS 0xc0 | |
41 | #define RR_BITS 0x03 | |
42 | #define LOOPMODE_BITS 0x41 | |
43 | #define RS232_MODE 0x00 | |
44 | #define RTSCTS_TO_CONNECTOR 0x40 | |
45 | #define CLKS_X4 0x02 | |
46 | #define FULLPWRBIT 0x00000080 | |
47 | #define NEXT_BOARD_POWER_BIT 0x00000004 | |
48 | ||
3c35b002 | 49 | static int debug; |
52af9545 BP |
50 | |
51 | /* Version Information */ | |
52 | #define DRIVER_VERSION "v0.1" | |
53 | #define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver" | |
54 | ||
55 | #define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */ | |
56 | #define QUATECH_SSU100 0xC020 /* SSU100 */ | |
57 | ||
58 | static const struct usb_device_id id_table[] = { | |
59 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)}, | |
60 | {} /* Terminating entry */ | |
61 | }; | |
62 | ||
63 | MODULE_DEVICE_TABLE(usb, id_table); | |
64 | ||
65 | ||
66 | static struct usb_driver ssu100_driver = { | |
67 | .name = "ssu100", | |
68 | .probe = usb_serial_probe, | |
69 | .disconnect = usb_serial_disconnect, | |
70 | .id_table = id_table, | |
71 | .suspend = usb_serial_suspend, | |
72 | .resume = usb_serial_resume, | |
73 | .no_dynamic_id = 1, | |
74 | .supports_autosuspend = 1, | |
75 | }; | |
76 | ||
77 | struct ssu100_port_private { | |
17523058 | 78 | spinlock_t status_lock; |
52af9545 BP |
79 | u8 shadowLSR; |
80 | u8 shadowMSR; | |
81 | wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ | |
f81c83db | 82 | struct async_icount icount; |
52af9545 BP |
83 | }; |
84 | ||
85 | static void ssu100_release(struct usb_serial *serial) | |
86 | { | |
87 | struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port); | |
88 | ||
89 | dbg("%s", __func__); | |
90 | kfree(priv); | |
91 | } | |
92 | ||
93 | static inline int ssu100_control_msg(struct usb_device *dev, | |
94 | u8 request, u16 data, u16 index) | |
95 | { | |
96 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
97 | request, 0x40, data, index, | |
98 | NULL, 0, 300); | |
99 | } | |
100 | ||
101 | static inline int ssu100_setdevice(struct usb_device *dev, u8 *data) | |
102 | { | |
103 | u16 x = ((u16)(data[1] << 8) | (u16)(data[0])); | |
104 | ||
105 | return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
106 | } | |
107 | ||
108 | ||
109 | static inline int ssu100_getdevice(struct usb_device *dev, u8 *data) | |
110 | { | |
111 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
112 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
113 | data, 3, 300); | |
114 | } | |
115 | ||
116 | static inline int ssu100_getregister(struct usb_device *dev, | |
117 | unsigned short uart, | |
118 | unsigned short reg, | |
119 | u8 *data) | |
120 | { | |
121 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
122 | QT_SET_GET_REGISTER, 0xc0, reg, | |
123 | uart, data, sizeof(*data), 300); | |
124 | ||
125 | } | |
126 | ||
127 | ||
128 | static inline int ssu100_setregister(struct usb_device *dev, | |
129 | unsigned short uart, | |
556f1a0e | 130 | unsigned short reg, |
52af9545 BP |
131 | u16 data) |
132 | { | |
556f1a0e | 133 | u16 value = (data << 8) | reg; |
52af9545 BP |
134 | |
135 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
136 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
137 | NULL, 0, 300); | |
138 | ||
139 | } | |
140 | ||
141 | #define set_mctrl(dev, set) update_mctrl((dev), (set), 0) | |
142 | #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear)) | |
143 | ||
144 | /* these do not deal with device that have more than 1 port */ | |
145 | static inline int update_mctrl(struct usb_device *dev, unsigned int set, | |
146 | unsigned int clear) | |
147 | { | |
148 | unsigned urb_value; | |
149 | int result; | |
150 | ||
151 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
152 | dbg("%s - DTR|RTS not being set|cleared", __func__); | |
153 | return 0; /* no change */ | |
154 | } | |
155 | ||
156 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
157 | urb_value = 0; | |
158 | if (set & TIOCM_DTR) | |
79f203a2 | 159 | urb_value |= UART_MCR_DTR; |
52af9545 | 160 | if (set & TIOCM_RTS) |
79f203a2 | 161 | urb_value |= UART_MCR_RTS; |
52af9545 | 162 | |
556f1a0e | 163 | result = ssu100_setregister(dev, 0, UART_MCR, urb_value); |
52af9545 BP |
164 | if (result < 0) |
165 | dbg("%s Error from MODEM_CTRL urb", __func__); | |
166 | ||
167 | return result; | |
168 | } | |
169 | ||
170 | static int ssu100_initdevice(struct usb_device *dev) | |
171 | { | |
172 | u8 *data; | |
173 | int result = 0; | |
174 | ||
175 | dbg("%s", __func__); | |
176 | ||
177 | data = kzalloc(3, GFP_KERNEL); | |
178 | if (!data) | |
179 | return -ENOMEM; | |
180 | ||
181 | result = ssu100_getdevice(dev, data); | |
182 | if (result < 0) { | |
183 | dbg("%s - get_device failed %i", __func__, result); | |
184 | goto out; | |
185 | } | |
186 | ||
187 | data[1] &= ~FULLPWRBIT; | |
188 | ||
189 | result = ssu100_setdevice(dev, data); | |
190 | if (result < 0) { | |
191 | dbg("%s - setdevice failed %i", __func__, result); | |
192 | goto out; | |
193 | } | |
194 | ||
195 | result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0); | |
196 | if (result < 0) { | |
197 | dbg("%s - set prebuffer level failed %i", __func__, result); | |
198 | goto out; | |
199 | } | |
200 | ||
201 | result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0); | |
202 | if (result < 0) { | |
203 | dbg("%s - set ATFprebuffer level failed %i", __func__, result); | |
204 | goto out; | |
205 | } | |
206 | ||
207 | result = ssu100_getdevice(dev, data); | |
208 | if (result < 0) { | |
209 | dbg("%s - get_device failed %i", __func__, result); | |
210 | goto out; | |
211 | } | |
212 | ||
213 | data[0] &= ~(RR_BITS | DUPMODE_BITS); | |
214 | data[0] |= CLKS_X4; | |
215 | data[1] &= ~(LOOPMODE_BITS); | |
216 | data[1] |= RS232_MODE; | |
217 | ||
218 | result = ssu100_setdevice(dev, data); | |
219 | if (result < 0) { | |
220 | dbg("%s - setdevice failed %i", __func__, result); | |
221 | goto out; | |
222 | } | |
223 | ||
224 | out: kfree(data); | |
225 | return result; | |
226 | ||
227 | } | |
228 | ||
229 | ||
230 | static void ssu100_set_termios(struct tty_struct *tty, | |
231 | struct usb_serial_port *port, | |
232 | struct ktermios *old_termios) | |
233 | { | |
234 | struct usb_device *dev = port->serial->dev; | |
235 | struct ktermios *termios = tty->termios; | |
236 | u16 baud, divisor, remainder; | |
237 | unsigned int cflag = termios->c_cflag; | |
238 | u16 urb_value = 0; /* will hold the new flags */ | |
239 | int result; | |
240 | ||
241 | dbg("%s", __func__); | |
242 | ||
243 | if (cflag & PARENB) { | |
244 | if (cflag & PARODD) | |
79f203a2 | 245 | urb_value |= UART_LCR_PARITY; |
52af9545 BP |
246 | else |
247 | urb_value |= SERIAL_EVEN_PARITY; | |
248 | } | |
249 | ||
250 | switch (cflag & CSIZE) { | |
251 | case CS5: | |
79f203a2 | 252 | urb_value |= UART_LCR_WLEN5; |
52af9545 BP |
253 | break; |
254 | case CS6: | |
79f203a2 | 255 | urb_value |= UART_LCR_WLEN6; |
52af9545 BP |
256 | break; |
257 | case CS7: | |
79f203a2 | 258 | urb_value |= UART_LCR_WLEN7; |
52af9545 BP |
259 | break; |
260 | default: | |
261 | case CS8: | |
79f203a2 | 262 | urb_value |= UART_LCR_WLEN8; |
52af9545 BP |
263 | break; |
264 | } | |
265 | ||
266 | baud = tty_get_baud_rate(tty); | |
267 | if (!baud) | |
268 | baud = 9600; | |
269 | ||
270 | dbg("%s - got baud = %d\n", __func__, baud); | |
271 | ||
272 | ||
273 | divisor = MAX_BAUD_RATE / baud; | |
274 | remainder = MAX_BAUD_RATE % baud; | |
275 | if (((remainder * 2) >= baud) && (baud != 110)) | |
276 | divisor++; | |
277 | ||
278 | urb_value = urb_value << 8; | |
279 | ||
280 | result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value); | |
281 | if (result < 0) | |
282 | dbg("%s - set uart failed", __func__); | |
283 | ||
284 | if (cflag & CRTSCTS) | |
285 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
286 | SERIAL_CRTSCTS, 0); | |
287 | else | |
288 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
289 | 0, 0); | |
290 | if (result < 0) | |
291 | dbg("%s - set HW flow control failed", __func__); | |
292 | ||
293 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
294 | u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty))); | |
295 | ||
296 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
297 | x, 0); | |
298 | } else | |
299 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
300 | 0, 0); | |
301 | ||
302 | if (result < 0) | |
303 | dbg("%s - set SW flow control failed", __func__); | |
304 | ||
305 | } | |
306 | ||
307 | ||
308 | static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port) | |
309 | { | |
310 | struct usb_device *dev = port->serial->dev; | |
311 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
312 | u8 *data; | |
313 | int result; | |
17523058 | 314 | unsigned long flags; |
52af9545 BP |
315 | |
316 | dbg("%s - port %d", __func__, port->number); | |
317 | ||
318 | data = kzalloc(2, GFP_KERNEL); | |
319 | if (!data) | |
320 | return -ENOMEM; | |
321 | ||
322 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
323 | QT_OPEN_CLOSE_CHANNEL, | |
324 | QT_TRANSFER_IN, 0x01, | |
325 | 0, data, 2, 300); | |
326 | if (result < 0) { | |
327 | dbg("%s - open failed %i", __func__, result); | |
328 | kfree(data); | |
329 | return result; | |
330 | } | |
331 | ||
17523058 | 332 | spin_lock_irqsave(&priv->status_lock, flags); |
f81c83db BP |
333 | priv->shadowLSR = data[0]; |
334 | priv->shadowMSR = data[1]; | |
17523058 | 335 | spin_unlock_irqrestore(&priv->status_lock, flags); |
52af9545 BP |
336 | |
337 | kfree(data); | |
338 | ||
339 | /* set to 9600 */ | |
340 | result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300); | |
341 | if (result < 0) | |
342 | dbg("%s - set uart failed", __func__); | |
343 | ||
344 | if (tty) | |
345 | ssu100_set_termios(tty, port, tty->termios); | |
346 | ||
347 | return usb_serial_generic_open(tty, port); | |
348 | } | |
349 | ||
350 | static void ssu100_close(struct usb_serial_port *port) | |
351 | { | |
352 | dbg("%s", __func__); | |
353 | usb_serial_generic_close(port); | |
354 | } | |
355 | ||
356 | static int get_serial_info(struct usb_serial_port *port, | |
357 | struct serial_struct __user *retinfo) | |
358 | { | |
359 | struct serial_struct tmp; | |
360 | ||
361 | if (!retinfo) | |
362 | return -EFAULT; | |
363 | ||
364 | memset(&tmp, 0, sizeof(tmp)); | |
365 | tmp.line = port->serial->minor; | |
366 | tmp.port = 0; | |
367 | tmp.irq = 0; | |
368 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
369 | tmp.xmit_fifo_size = port->bulk_out_size; | |
370 | tmp.baud_base = 9600; | |
371 | tmp.close_delay = 5*HZ; | |
372 | tmp.closing_wait = 30*HZ; | |
373 | ||
374 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
375 | return -EFAULT; | |
376 | return 0; | |
377 | } | |
378 | ||
f81c83db BP |
379 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) |
380 | { | |
381 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
382 | struct async_icount prev, cur; | |
383 | unsigned long flags; | |
384 | ||
385 | spin_lock_irqsave(&priv->status_lock, flags); | |
386 | prev = priv->icount; | |
387 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
388 | ||
389 | while (1) { | |
390 | wait_event_interruptible(priv->delta_msr_wait, | |
391 | ((priv->icount.rng != prev.rng) || | |
392 | (priv->icount.dsr != prev.dsr) || | |
393 | (priv->icount.dcd != prev.dcd) || | |
394 | (priv->icount.cts != prev.cts))); | |
395 | ||
396 | if (signal_pending(current)) | |
397 | return -ERESTARTSYS; | |
398 | ||
399 | spin_lock_irqsave(&priv->status_lock, flags); | |
400 | cur = priv->icount; | |
401 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
402 | ||
403 | if ((prev.rng == cur.rng) && | |
404 | (prev.dsr == cur.dsr) && | |
405 | (prev.dcd == cur.dcd) && | |
406 | (prev.cts == cur.cts)) | |
407 | return -EIO; | |
408 | ||
409 | if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) || | |
410 | (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) || | |
411 | (arg & TIOCM_CD && (prev.dcd != cur.dcd)) || | |
412 | (arg & TIOCM_CTS && (prev.cts != cur.cts))) | |
413 | return 0; | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | ||
0bca1b91 AC |
418 | static int ssu100_get_icount(struct tty_struct *tty, |
419 | struct serial_icounter_struct *icount) | |
420 | { | |
421 | struct usb_serial_port *port = tty->driver_data; | |
422 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
423 | struct async_icount cnow = priv->icount; | |
424 | ||
425 | icount->cts = cnow.cts; | |
426 | icount->dsr = cnow.dsr; | |
427 | icount->rng = cnow.rng; | |
428 | icount->dcd = cnow.dcd; | |
429 | icount->rx = cnow.rx; | |
430 | icount->tx = cnow.tx; | |
431 | icount->frame = cnow.frame; | |
432 | icount->overrun = cnow.overrun; | |
433 | icount->parity = cnow.parity; | |
434 | icount->brk = cnow.brk; | |
435 | icount->buf_overrun = cnow.buf_overrun; | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
440 | ||
441 | ||
52af9545 BP |
442 | static int ssu100_ioctl(struct tty_struct *tty, struct file *file, |
443 | unsigned int cmd, unsigned long arg) | |
444 | { | |
445 | struct usb_serial_port *port = tty->driver_data; | |
52af9545 BP |
446 | |
447 | dbg("%s cmd 0x%04x", __func__, cmd); | |
448 | ||
449 | switch (cmd) { | |
450 | case TIOCGSERIAL: | |
451 | return get_serial_info(port, | |
452 | (struct serial_struct __user *) arg); | |
453 | ||
454 | case TIOCMIWAIT: | |
f81c83db BP |
455 | return wait_modem_info(port, arg); |
456 | ||
52af9545 BP |
457 | default: |
458 | break; | |
459 | } | |
460 | ||
461 | dbg("%s arg not supported", __func__); | |
462 | ||
463 | return -ENOIOCTLCMD; | |
464 | } | |
465 | ||
52af9545 BP |
466 | static int ssu100_attach(struct usb_serial *serial) |
467 | { | |
468 | struct ssu100_port_private *priv; | |
469 | struct usb_serial_port *port = *serial->port; | |
470 | ||
471 | dbg("%s", __func__); | |
472 | ||
473 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
474 | if (!priv) { | |
475 | dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__, | |
476 | sizeof(*priv)); | |
477 | return -ENOMEM; | |
478 | } | |
479 | ||
17523058 | 480 | spin_lock_init(&priv->status_lock); |
52af9545 BP |
481 | init_waitqueue_head(&priv->delta_msr_wait); |
482 | usb_set_serial_port_data(port, priv); | |
52af9545 BP |
483 | |
484 | return ssu100_initdevice(serial->dev); | |
485 | } | |
486 | ||
487 | static int ssu100_tiocmget(struct tty_struct *tty, struct file *file) | |
488 | { | |
489 | struct usb_serial_port *port = tty->driver_data; | |
490 | struct usb_device *dev = port->serial->dev; | |
491 | u8 *d; | |
492 | int r; | |
493 | ||
494 | dbg("%s\n", __func__); | |
495 | ||
496 | d = kzalloc(2, GFP_KERNEL); | |
497 | if (!d) | |
498 | return -ENOMEM; | |
499 | ||
79f203a2 | 500 | r = ssu100_getregister(dev, 0, UART_MCR, d); |
52af9545 BP |
501 | if (r < 0) |
502 | goto mget_out; | |
503 | ||
79f203a2 | 504 | r = ssu100_getregister(dev, 0, UART_MSR, d+1); |
52af9545 BP |
505 | if (r < 0) |
506 | goto mget_out; | |
507 | ||
79f203a2 BP |
508 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | |
509 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
510 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
511 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
512 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
513 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
52af9545 BP |
514 | |
515 | mget_out: | |
516 | kfree(d); | |
517 | return r; | |
518 | } | |
519 | ||
520 | static int ssu100_tiocmset(struct tty_struct *tty, struct file *file, | |
521 | unsigned int set, unsigned int clear) | |
522 | { | |
523 | struct usb_serial_port *port = tty->driver_data; | |
524 | struct usb_device *dev = port->serial->dev; | |
525 | ||
526 | dbg("%s\n", __func__); | |
527 | return update_mctrl(dev, set, clear); | |
528 | } | |
529 | ||
530 | static void ssu100_dtr_rts(struct usb_serial_port *port, int on) | |
531 | { | |
532 | struct usb_device *dev = port->serial->dev; | |
533 | ||
534 | dbg("%s\n", __func__); | |
535 | ||
536 | mutex_lock(&port->serial->disc_mutex); | |
537 | if (!port->serial->disconnected) { | |
538 | /* Disable flow control */ | |
539 | if (!on && | |
556f1a0e | 540 | ssu100_setregister(dev, 0, UART_MCR, 0) < 0) |
52af9545 BP |
541 | dev_err(&port->dev, "error from flowcontrol urb\n"); |
542 | /* drop RTS and DTR */ | |
543 | if (on) | |
544 | set_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
545 | else | |
546 | clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
547 | } | |
548 | mutex_unlock(&port->serial->disc_mutex); | |
549 | } | |
550 | ||
f81c83db BP |
551 | static void ssu100_update_msr(struct usb_serial_port *port, u8 msr) |
552 | { | |
553 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
554 | unsigned long flags; | |
555 | ||
556 | spin_lock_irqsave(&priv->status_lock, flags); | |
557 | priv->shadowMSR = msr; | |
558 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
559 | ||
560 | if (msr & UART_MSR_ANY_DELTA) { | |
561 | /* update input line counters */ | |
562 | if (msr & UART_MSR_DCTS) | |
563 | priv->icount.cts++; | |
564 | if (msr & UART_MSR_DDSR) | |
565 | priv->icount.dsr++; | |
566 | if (msr & UART_MSR_DDCD) | |
567 | priv->icount.dcd++; | |
568 | if (msr & UART_MSR_TERI) | |
569 | priv->icount.rng++; | |
570 | wake_up_interruptible(&priv->delta_msr_wait); | |
571 | } | |
572 | } | |
573 | ||
6b8f1ca5 BP |
574 | static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr, |
575 | char *tty_flag) | |
f81c83db BP |
576 | { |
577 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
578 | unsigned long flags; | |
579 | ||
580 | spin_lock_irqsave(&priv->status_lock, flags); | |
581 | priv->shadowLSR = lsr; | |
582 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
583 | ||
6b8f1ca5 | 584 | *tty_flag = TTY_NORMAL; |
f81c83db | 585 | if (lsr & UART_LSR_BRK_ERROR_BITS) { |
6b8f1ca5 BP |
586 | /* we always want to update icount, but we only want to |
587 | * update tty_flag for one case */ | |
588 | if (lsr & UART_LSR_BI) { | |
f81c83db | 589 | priv->icount.brk++; |
6b8f1ca5 BP |
590 | *tty_flag = TTY_BREAK; |
591 | usb_serial_handle_break(port); | |
592 | } | |
593 | if (lsr & UART_LSR_PE) { | |
f81c83db | 594 | priv->icount.parity++; |
6b8f1ca5 BP |
595 | if (*tty_flag == TTY_NORMAL) |
596 | *tty_flag = TTY_PARITY; | |
597 | } | |
598 | if (lsr & UART_LSR_FE) { | |
599 | priv->icount.frame++; | |
600 | if (*tty_flag == TTY_NORMAL) | |
601 | *tty_flag = TTY_FRAME; | |
602 | } | |
603 | if (lsr & UART_LSR_OE){ | |
f81c83db | 604 | priv->icount.overrun++; |
6b8f1ca5 BP |
605 | if (*tty_flag == TTY_NORMAL) |
606 | *tty_flag = TTY_OVERRUN; | |
607 | } | |
f81c83db | 608 | } |
6b8f1ca5 | 609 | |
f81c83db BP |
610 | } |
611 | ||
f7043ecb BP |
612 | static int ssu100_process_packet(struct urb *urb, |
613 | struct tty_struct *tty) | |
52af9545 | 614 | { |
f7043ecb BP |
615 | struct usb_serial_port *port = urb->context; |
616 | char *packet = (char *)urb->transfer_buffer; | |
6b8f1ca5 | 617 | char flag = TTY_NORMAL; |
f7043ecb BP |
618 | u32 len = urb->actual_length; |
619 | int i; | |
52af9545 BP |
620 | char *ch; |
621 | ||
622 | dbg("%s - port %d", __func__, port->number); | |
623 | ||
9b2cef31 BP |
624 | if ((len >= 4) && |
625 | (packet[0] == 0x1b) && (packet[1] == 0x1b) && | |
52af9545 | 626 | ((packet[2] == 0x00) || (packet[2] == 0x01))) { |
6b8f1ca5 BP |
627 | if (packet[2] == 0x00) { |
628 | ssu100_update_lsr(port, packet[3], &flag); | |
629 | if (flag == TTY_OVERRUN) | |
630 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
631 | } | |
f81c83db BP |
632 | if (packet[2] == 0x01) |
633 | ssu100_update_msr(port, packet[3]); | |
52af9545 BP |
634 | |
635 | len -= 4; | |
636 | ch = packet + 4; | |
637 | } else | |
638 | ch = packet; | |
639 | ||
640 | if (!len) | |
641 | return 0; /* status only */ | |
642 | ||
643 | if (port->port.console && port->sysrq) { | |
644 | for (i = 0; i < len; i++, ch++) { | |
6ee9f4b4 | 645 | if (!usb_serial_handle_sysrq_char(port, *ch)) |
52af9545 BP |
646 | tty_insert_flip_char(tty, *ch, flag); |
647 | } | |
648 | } else | |
649 | tty_insert_flip_string_fixed_flag(tty, ch, flag, len); | |
650 | ||
651 | return len; | |
652 | } | |
653 | ||
654 | static void ssu100_process_read_urb(struct urb *urb) | |
655 | { | |
656 | struct usb_serial_port *port = urb->context; | |
52af9545 | 657 | struct tty_struct *tty; |
f7043ecb | 658 | int count; |
52af9545 BP |
659 | |
660 | dbg("%s", __func__); | |
661 | ||
662 | tty = tty_port_tty_get(&port->port); | |
663 | if (!tty) | |
664 | return; | |
665 | ||
f7043ecb | 666 | count = ssu100_process_packet(urb, tty); |
52af9545 BP |
667 | |
668 | if (count) | |
669 | tty_flip_buffer_push(tty); | |
670 | tty_kref_put(tty); | |
671 | } | |
672 | ||
52af9545 BP |
673 | static struct usb_serial_driver ssu100_device = { |
674 | .driver = { | |
675 | .owner = THIS_MODULE, | |
676 | .name = "ssu100", | |
677 | }, | |
678 | .description = DRIVER_DESC, | |
679 | .id_table = id_table, | |
680 | .usb_driver = &ssu100_driver, | |
681 | .num_ports = 1, | |
52af9545 BP |
682 | .open = ssu100_open, |
683 | .close = ssu100_close, | |
684 | .attach = ssu100_attach, | |
685 | .release = ssu100_release, | |
686 | .dtr_rts = ssu100_dtr_rts, | |
687 | .process_read_urb = ssu100_process_read_urb, | |
688 | .tiocmget = ssu100_tiocmget, | |
689 | .tiocmset = ssu100_tiocmset, | |
0bca1b91 | 690 | .get_icount = ssu100_get_icount, |
52af9545 BP |
691 | .ioctl = ssu100_ioctl, |
692 | .set_termios = ssu100_set_termios, | |
85dee135 | 693 | .disconnect = usb_serial_generic_disconnect, |
52af9545 BP |
694 | }; |
695 | ||
696 | static int __init ssu100_init(void) | |
697 | { | |
698 | int retval; | |
699 | ||
700 | dbg("%s", __func__); | |
701 | ||
702 | /* register with usb-serial */ | |
703 | retval = usb_serial_register(&ssu100_device); | |
704 | ||
705 | if (retval) | |
706 | goto failed_usb_sio_register; | |
707 | ||
708 | retval = usb_register(&ssu100_driver); | |
709 | if (retval) | |
710 | goto failed_usb_register; | |
711 | ||
712 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" | |
713 | DRIVER_DESC "\n"); | |
714 | ||
715 | return 0; | |
716 | ||
717 | failed_usb_register: | |
718 | usb_serial_deregister(&ssu100_device); | |
719 | failed_usb_sio_register: | |
720 | return retval; | |
721 | } | |
722 | ||
723 | static void __exit ssu100_exit(void) | |
724 | { | |
725 | usb_deregister(&ssu100_driver); | |
726 | usb_serial_deregister(&ssu100_device); | |
727 | } | |
728 | ||
729 | module_init(ssu100_init); | |
730 | module_exit(ssu100_exit); | |
731 | ||
732 | MODULE_DESCRIPTION(DRIVER_DESC); | |
733 | MODULE_LICENSE("GPL"); | |
734 | ||
735 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
736 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |