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 | ||
49 | static int debug = 1; | |
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 */ | |
82 | unsigned short max_packet_size; | |
f81c83db | 83 | struct async_icount icount; |
52af9545 BP |
84 | }; |
85 | ||
86 | static void ssu100_release(struct usb_serial *serial) | |
87 | { | |
88 | struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port); | |
89 | ||
90 | dbg("%s", __func__); | |
91 | kfree(priv); | |
92 | } | |
93 | ||
94 | static inline int ssu100_control_msg(struct usb_device *dev, | |
95 | u8 request, u16 data, u16 index) | |
96 | { | |
97 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
98 | request, 0x40, data, index, | |
99 | NULL, 0, 300); | |
100 | } | |
101 | ||
102 | static inline int ssu100_setdevice(struct usb_device *dev, u8 *data) | |
103 | { | |
104 | u16 x = ((u16)(data[1] << 8) | (u16)(data[0])); | |
105 | ||
106 | return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
107 | } | |
108 | ||
109 | ||
110 | static inline int ssu100_getdevice(struct usb_device *dev, u8 *data) | |
111 | { | |
112 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
113 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
114 | data, 3, 300); | |
115 | } | |
116 | ||
117 | static inline int ssu100_getregister(struct usb_device *dev, | |
118 | unsigned short uart, | |
119 | unsigned short reg, | |
120 | u8 *data) | |
121 | { | |
122 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
123 | QT_SET_GET_REGISTER, 0xc0, reg, | |
124 | uart, data, sizeof(*data), 300); | |
125 | ||
126 | } | |
127 | ||
128 | ||
129 | static inline int ssu100_setregister(struct usb_device *dev, | |
130 | unsigned short uart, | |
556f1a0e | 131 | unsigned short reg, |
52af9545 BP |
132 | u16 data) |
133 | { | |
556f1a0e | 134 | u16 value = (data << 8) | reg; |
52af9545 BP |
135 | |
136 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
137 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
138 | NULL, 0, 300); | |
139 | ||
140 | } | |
141 | ||
142 | #define set_mctrl(dev, set) update_mctrl((dev), (set), 0) | |
143 | #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear)) | |
144 | ||
145 | /* these do not deal with device that have more than 1 port */ | |
146 | static inline int update_mctrl(struct usb_device *dev, unsigned int set, | |
147 | unsigned int clear) | |
148 | { | |
149 | unsigned urb_value; | |
150 | int result; | |
151 | ||
152 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
153 | dbg("%s - DTR|RTS not being set|cleared", __func__); | |
154 | return 0; /* no change */ | |
155 | } | |
156 | ||
157 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
158 | urb_value = 0; | |
159 | if (set & TIOCM_DTR) | |
79f203a2 | 160 | urb_value |= UART_MCR_DTR; |
52af9545 | 161 | if (set & TIOCM_RTS) |
79f203a2 | 162 | urb_value |= UART_MCR_RTS; |
52af9545 | 163 | |
556f1a0e | 164 | result = ssu100_setregister(dev, 0, UART_MCR, urb_value); |
52af9545 BP |
165 | if (result < 0) |
166 | dbg("%s Error from MODEM_CTRL urb", __func__); | |
167 | ||
168 | return result; | |
169 | } | |
170 | ||
171 | static int ssu100_initdevice(struct usb_device *dev) | |
172 | { | |
173 | u8 *data; | |
174 | int result = 0; | |
175 | ||
176 | dbg("%s", __func__); | |
177 | ||
178 | data = kzalloc(3, GFP_KERNEL); | |
179 | if (!data) | |
180 | return -ENOMEM; | |
181 | ||
182 | result = ssu100_getdevice(dev, data); | |
183 | if (result < 0) { | |
184 | dbg("%s - get_device failed %i", __func__, result); | |
185 | goto out; | |
186 | } | |
187 | ||
188 | data[1] &= ~FULLPWRBIT; | |
189 | ||
190 | result = ssu100_setdevice(dev, data); | |
191 | if (result < 0) { | |
192 | dbg("%s - setdevice failed %i", __func__, result); | |
193 | goto out; | |
194 | } | |
195 | ||
196 | result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0); | |
197 | if (result < 0) { | |
198 | dbg("%s - set prebuffer level failed %i", __func__, result); | |
199 | goto out; | |
200 | } | |
201 | ||
202 | result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0); | |
203 | if (result < 0) { | |
204 | dbg("%s - set ATFprebuffer level failed %i", __func__, result); | |
205 | goto out; | |
206 | } | |
207 | ||
208 | result = ssu100_getdevice(dev, data); | |
209 | if (result < 0) { | |
210 | dbg("%s - get_device failed %i", __func__, result); | |
211 | goto out; | |
212 | } | |
213 | ||
214 | data[0] &= ~(RR_BITS | DUPMODE_BITS); | |
215 | data[0] |= CLKS_X4; | |
216 | data[1] &= ~(LOOPMODE_BITS); | |
217 | data[1] |= RS232_MODE; | |
218 | ||
219 | result = ssu100_setdevice(dev, data); | |
220 | if (result < 0) { | |
221 | dbg("%s - setdevice failed %i", __func__, result); | |
222 | goto out; | |
223 | } | |
224 | ||
225 | out: kfree(data); | |
226 | return result; | |
227 | ||
228 | } | |
229 | ||
230 | ||
231 | static void ssu100_set_termios(struct tty_struct *tty, | |
232 | struct usb_serial_port *port, | |
233 | struct ktermios *old_termios) | |
234 | { | |
235 | struct usb_device *dev = port->serial->dev; | |
236 | struct ktermios *termios = tty->termios; | |
237 | u16 baud, divisor, remainder; | |
238 | unsigned int cflag = termios->c_cflag; | |
239 | u16 urb_value = 0; /* will hold the new flags */ | |
240 | int result; | |
241 | ||
242 | dbg("%s", __func__); | |
243 | ||
244 | if (cflag & PARENB) { | |
245 | if (cflag & PARODD) | |
79f203a2 | 246 | urb_value |= UART_LCR_PARITY; |
52af9545 BP |
247 | else |
248 | urb_value |= SERIAL_EVEN_PARITY; | |
249 | } | |
250 | ||
251 | switch (cflag & CSIZE) { | |
252 | case CS5: | |
79f203a2 | 253 | urb_value |= UART_LCR_WLEN5; |
52af9545 BP |
254 | break; |
255 | case CS6: | |
79f203a2 | 256 | urb_value |= UART_LCR_WLEN6; |
52af9545 BP |
257 | break; |
258 | case CS7: | |
79f203a2 | 259 | urb_value |= UART_LCR_WLEN7; |
52af9545 BP |
260 | break; |
261 | default: | |
262 | case CS8: | |
79f203a2 | 263 | urb_value |= UART_LCR_WLEN8; |
52af9545 BP |
264 | break; |
265 | } | |
266 | ||
267 | baud = tty_get_baud_rate(tty); | |
268 | if (!baud) | |
269 | baud = 9600; | |
270 | ||
271 | dbg("%s - got baud = %d\n", __func__, baud); | |
272 | ||
273 | ||
274 | divisor = MAX_BAUD_RATE / baud; | |
275 | remainder = MAX_BAUD_RATE % baud; | |
276 | if (((remainder * 2) >= baud) && (baud != 110)) | |
277 | divisor++; | |
278 | ||
279 | urb_value = urb_value << 8; | |
280 | ||
281 | result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value); | |
282 | if (result < 0) | |
283 | dbg("%s - set uart failed", __func__); | |
284 | ||
285 | if (cflag & CRTSCTS) | |
286 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
287 | SERIAL_CRTSCTS, 0); | |
288 | else | |
289 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
290 | 0, 0); | |
291 | if (result < 0) | |
292 | dbg("%s - set HW flow control failed", __func__); | |
293 | ||
294 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
295 | u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty))); | |
296 | ||
297 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
298 | x, 0); | |
299 | } else | |
300 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
301 | 0, 0); | |
302 | ||
303 | if (result < 0) | |
304 | dbg("%s - set SW flow control failed", __func__); | |
305 | ||
306 | } | |
307 | ||
308 | ||
309 | static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port) | |
310 | { | |
311 | struct usb_device *dev = port->serial->dev; | |
312 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
313 | u8 *data; | |
314 | int result; | |
17523058 | 315 | unsigned long flags; |
52af9545 BP |
316 | |
317 | dbg("%s - port %d", __func__, port->number); | |
318 | ||
319 | data = kzalloc(2, GFP_KERNEL); | |
320 | if (!data) | |
321 | return -ENOMEM; | |
322 | ||
323 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
324 | QT_OPEN_CLOSE_CHANNEL, | |
325 | QT_TRANSFER_IN, 0x01, | |
326 | 0, data, 2, 300); | |
327 | if (result < 0) { | |
328 | dbg("%s - open failed %i", __func__, result); | |
329 | kfree(data); | |
330 | return result; | |
331 | } | |
332 | ||
17523058 | 333 | spin_lock_irqsave(&priv->status_lock, flags); |
f81c83db BP |
334 | priv->shadowLSR = data[0]; |
335 | priv->shadowMSR = data[1]; | |
17523058 | 336 | spin_unlock_irqrestore(&priv->status_lock, flags); |
52af9545 BP |
337 | |
338 | kfree(data); | |
339 | ||
340 | /* set to 9600 */ | |
341 | result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300); | |
342 | if (result < 0) | |
343 | dbg("%s - set uart failed", __func__); | |
344 | ||
345 | if (tty) | |
346 | ssu100_set_termios(tty, port, tty->termios); | |
347 | ||
348 | return usb_serial_generic_open(tty, port); | |
349 | } | |
350 | ||
351 | static void ssu100_close(struct usb_serial_port *port) | |
352 | { | |
353 | dbg("%s", __func__); | |
354 | usb_serial_generic_close(port); | |
355 | } | |
356 | ||
357 | static int get_serial_info(struct usb_serial_port *port, | |
358 | struct serial_struct __user *retinfo) | |
359 | { | |
360 | struct serial_struct tmp; | |
361 | ||
362 | if (!retinfo) | |
363 | return -EFAULT; | |
364 | ||
365 | memset(&tmp, 0, sizeof(tmp)); | |
366 | tmp.line = port->serial->minor; | |
367 | tmp.port = 0; | |
368 | tmp.irq = 0; | |
369 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
370 | tmp.xmit_fifo_size = port->bulk_out_size; | |
371 | tmp.baud_base = 9600; | |
372 | tmp.close_delay = 5*HZ; | |
373 | tmp.closing_wait = 30*HZ; | |
374 | ||
375 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
376 | return -EFAULT; | |
377 | return 0; | |
378 | } | |
379 | ||
f81c83db BP |
380 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) |
381 | { | |
382 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
383 | struct async_icount prev, cur; | |
384 | unsigned long flags; | |
385 | ||
386 | spin_lock_irqsave(&priv->status_lock, flags); | |
387 | prev = priv->icount; | |
388 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
389 | ||
390 | while (1) { | |
391 | wait_event_interruptible(priv->delta_msr_wait, | |
392 | ((priv->icount.rng != prev.rng) || | |
393 | (priv->icount.dsr != prev.dsr) || | |
394 | (priv->icount.dcd != prev.dcd) || | |
395 | (priv->icount.cts != prev.cts))); | |
396 | ||
397 | if (signal_pending(current)) | |
398 | return -ERESTARTSYS; | |
399 | ||
400 | spin_lock_irqsave(&priv->status_lock, flags); | |
401 | cur = priv->icount; | |
402 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
403 | ||
404 | if ((prev.rng == cur.rng) && | |
405 | (prev.dsr == cur.dsr) && | |
406 | (prev.dcd == cur.dcd) && | |
407 | (prev.cts == cur.cts)) | |
408 | return -EIO; | |
409 | ||
410 | if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) || | |
411 | (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) || | |
412 | (arg & TIOCM_CD && (prev.dcd != cur.dcd)) || | |
413 | (arg & TIOCM_CTS && (prev.cts != cur.cts))) | |
414 | return 0; | |
415 | } | |
416 | return 0; | |
417 | } | |
418 | ||
52af9545 BP |
419 | static int ssu100_ioctl(struct tty_struct *tty, struct file *file, |
420 | unsigned int cmd, unsigned long arg) | |
421 | { | |
422 | struct usb_serial_port *port = tty->driver_data; | |
423 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
f81c83db | 424 | void __user *user_arg = (void __user *)arg; |
52af9545 BP |
425 | |
426 | dbg("%s cmd 0x%04x", __func__, cmd); | |
427 | ||
428 | switch (cmd) { | |
429 | case TIOCGSERIAL: | |
430 | return get_serial_info(port, | |
431 | (struct serial_struct __user *) arg); | |
432 | ||
433 | case TIOCMIWAIT: | |
f81c83db BP |
434 | return wait_modem_info(port, arg); |
435 | ||
436 | case TIOCGICOUNT: | |
437 | { | |
438 | struct serial_icounter_struct icount; | |
439 | struct async_icount cnow = priv->icount; | |
440 | memset(&icount, 0, sizeof(icount)); | |
441 | icount.cts = cnow.cts; | |
442 | icount.dsr = cnow.dsr; | |
443 | icount.rng = cnow.rng; | |
444 | icount.dcd = cnow.dcd; | |
445 | icount.rx = cnow.rx; | |
446 | icount.tx = cnow.tx; | |
447 | icount.frame = cnow.frame; | |
448 | icount.overrun = cnow.overrun; | |
449 | icount.parity = cnow.parity; | |
450 | icount.brk = cnow.brk; | |
451 | icount.buf_overrun = cnow.buf_overrun; | |
452 | if (copy_to_user(user_arg, &icount, sizeof(icount))) | |
453 | return -EFAULT; | |
52af9545 | 454 | return 0; |
f81c83db | 455 | } |
52af9545 BP |
456 | |
457 | default: | |
458 | break; | |
459 | } | |
460 | ||
461 | dbg("%s arg not supported", __func__); | |
462 | ||
463 | return -ENOIOCTLCMD; | |
464 | } | |
465 | ||
466 | static void ssu100_set_max_packet_size(struct usb_serial_port *port) | |
467 | { | |
468 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
469 | struct usb_serial *serial = port->serial; | |
470 | struct usb_device *udev = serial->dev; | |
471 | ||
472 | struct usb_interface *interface = serial->interface; | |
473 | struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc; | |
474 | ||
475 | unsigned num_endpoints; | |
476 | int i; | |
17523058 | 477 | unsigned long flags; |
52af9545 BP |
478 | |
479 | num_endpoints = interface->cur_altsetting->desc.bNumEndpoints; | |
480 | dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints); | |
481 | ||
482 | for (i = 0; i < num_endpoints; i++) { | |
483 | dev_info(&udev->dev, "Endpoint %d MaxPacketSize %d\n", i+1, | |
484 | interface->cur_altsetting->endpoint[i].desc.wMaxPacketSize); | |
485 | ep_desc = &interface->cur_altsetting->endpoint[i].desc; | |
486 | } | |
487 | ||
488 | /* set max packet size based on descriptor */ | |
17523058 | 489 | spin_lock_irqsave(&priv->status_lock, flags); |
52af9545 | 490 | priv->max_packet_size = ep_desc->wMaxPacketSize; |
17523058 | 491 | spin_unlock_irqrestore(&priv->status_lock, flags); |
52af9545 BP |
492 | |
493 | dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size); | |
494 | } | |
495 | ||
496 | static int ssu100_attach(struct usb_serial *serial) | |
497 | { | |
498 | struct ssu100_port_private *priv; | |
499 | struct usb_serial_port *port = *serial->port; | |
500 | ||
501 | dbg("%s", __func__); | |
502 | ||
503 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
504 | if (!priv) { | |
505 | dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__, | |
506 | sizeof(*priv)); | |
507 | return -ENOMEM; | |
508 | } | |
509 | ||
17523058 | 510 | spin_lock_init(&priv->status_lock); |
52af9545 BP |
511 | init_waitqueue_head(&priv->delta_msr_wait); |
512 | usb_set_serial_port_data(port, priv); | |
52af9545 BP |
513 | ssu100_set_max_packet_size(port); |
514 | ||
515 | return ssu100_initdevice(serial->dev); | |
516 | } | |
517 | ||
518 | static int ssu100_tiocmget(struct tty_struct *tty, struct file *file) | |
519 | { | |
520 | struct usb_serial_port *port = tty->driver_data; | |
521 | struct usb_device *dev = port->serial->dev; | |
522 | u8 *d; | |
523 | int r; | |
524 | ||
525 | dbg("%s\n", __func__); | |
526 | ||
527 | d = kzalloc(2, GFP_KERNEL); | |
528 | if (!d) | |
529 | return -ENOMEM; | |
530 | ||
79f203a2 | 531 | r = ssu100_getregister(dev, 0, UART_MCR, d); |
52af9545 BP |
532 | if (r < 0) |
533 | goto mget_out; | |
534 | ||
79f203a2 | 535 | r = ssu100_getregister(dev, 0, UART_MSR, d+1); |
52af9545 BP |
536 | if (r < 0) |
537 | goto mget_out; | |
538 | ||
79f203a2 BP |
539 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | |
540 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
541 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
542 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
543 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
544 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
52af9545 BP |
545 | |
546 | mget_out: | |
547 | kfree(d); | |
548 | return r; | |
549 | } | |
550 | ||
551 | static int ssu100_tiocmset(struct tty_struct *tty, struct file *file, | |
552 | unsigned int set, unsigned int clear) | |
553 | { | |
554 | struct usb_serial_port *port = tty->driver_data; | |
555 | struct usb_device *dev = port->serial->dev; | |
556 | ||
557 | dbg("%s\n", __func__); | |
558 | return update_mctrl(dev, set, clear); | |
559 | } | |
560 | ||
561 | static void ssu100_dtr_rts(struct usb_serial_port *port, int on) | |
562 | { | |
563 | struct usb_device *dev = port->serial->dev; | |
564 | ||
565 | dbg("%s\n", __func__); | |
566 | ||
567 | mutex_lock(&port->serial->disc_mutex); | |
568 | if (!port->serial->disconnected) { | |
569 | /* Disable flow control */ | |
570 | if (!on && | |
556f1a0e | 571 | ssu100_setregister(dev, 0, UART_MCR, 0) < 0) |
52af9545 BP |
572 | dev_err(&port->dev, "error from flowcontrol urb\n"); |
573 | /* drop RTS and DTR */ | |
574 | if (on) | |
575 | set_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
576 | else | |
577 | clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
578 | } | |
579 | mutex_unlock(&port->serial->disc_mutex); | |
580 | } | |
581 | ||
f81c83db BP |
582 | static void ssu100_update_msr(struct usb_serial_port *port, u8 msr) |
583 | { | |
584 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
585 | unsigned long flags; | |
586 | ||
587 | spin_lock_irqsave(&priv->status_lock, flags); | |
588 | priv->shadowMSR = msr; | |
589 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
590 | ||
591 | if (msr & UART_MSR_ANY_DELTA) { | |
592 | /* update input line counters */ | |
593 | if (msr & UART_MSR_DCTS) | |
594 | priv->icount.cts++; | |
595 | if (msr & UART_MSR_DDSR) | |
596 | priv->icount.dsr++; | |
597 | if (msr & UART_MSR_DDCD) | |
598 | priv->icount.dcd++; | |
599 | if (msr & UART_MSR_TERI) | |
600 | priv->icount.rng++; | |
601 | wake_up_interruptible(&priv->delta_msr_wait); | |
602 | } | |
603 | } | |
604 | ||
6b8f1ca5 BP |
605 | static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr, |
606 | char *tty_flag) | |
f81c83db BP |
607 | { |
608 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
609 | unsigned long flags; | |
610 | ||
611 | spin_lock_irqsave(&priv->status_lock, flags); | |
612 | priv->shadowLSR = lsr; | |
613 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
614 | ||
6b8f1ca5 | 615 | *tty_flag = TTY_NORMAL; |
f81c83db | 616 | if (lsr & UART_LSR_BRK_ERROR_BITS) { |
6b8f1ca5 BP |
617 | /* we always want to update icount, but we only want to |
618 | * update tty_flag for one case */ | |
619 | if (lsr & UART_LSR_BI) { | |
f81c83db | 620 | priv->icount.brk++; |
6b8f1ca5 BP |
621 | *tty_flag = TTY_BREAK; |
622 | usb_serial_handle_break(port); | |
623 | } | |
624 | if (lsr & UART_LSR_PE) { | |
f81c83db | 625 | priv->icount.parity++; |
6b8f1ca5 BP |
626 | if (*tty_flag == TTY_NORMAL) |
627 | *tty_flag = TTY_PARITY; | |
628 | } | |
629 | if (lsr & UART_LSR_FE) { | |
630 | priv->icount.frame++; | |
631 | if (*tty_flag == TTY_NORMAL) | |
632 | *tty_flag = TTY_FRAME; | |
633 | } | |
634 | if (lsr & UART_LSR_OE){ | |
f81c83db | 635 | priv->icount.overrun++; |
6b8f1ca5 BP |
636 | if (*tty_flag == TTY_NORMAL) |
637 | *tty_flag = TTY_OVERRUN; | |
638 | } | |
f81c83db | 639 | } |
6b8f1ca5 | 640 | |
f81c83db BP |
641 | } |
642 | ||
52af9545 BP |
643 | static int ssu100_process_packet(struct tty_struct *tty, |
644 | struct usb_serial_port *port, | |
645 | struct ssu100_port_private *priv, | |
646 | char *packet, int len) | |
647 | { | |
648 | int i; | |
6b8f1ca5 | 649 | char flag = TTY_NORMAL; |
52af9545 BP |
650 | char *ch; |
651 | ||
652 | dbg("%s - port %d", __func__, port->number); | |
653 | ||
9b2cef31 BP |
654 | if ((len >= 4) && |
655 | (packet[0] == 0x1b) && (packet[1] == 0x1b) && | |
52af9545 | 656 | ((packet[2] == 0x00) || (packet[2] == 0x01))) { |
6b8f1ca5 BP |
657 | if (packet[2] == 0x00) { |
658 | ssu100_update_lsr(port, packet[3], &flag); | |
659 | if (flag == TTY_OVERRUN) | |
660 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
661 | } | |
f81c83db BP |
662 | if (packet[2] == 0x01) |
663 | ssu100_update_msr(port, packet[3]); | |
52af9545 BP |
664 | |
665 | len -= 4; | |
666 | ch = packet + 4; | |
667 | } else | |
668 | ch = packet; | |
669 | ||
670 | if (!len) | |
671 | return 0; /* status only */ | |
672 | ||
673 | if (port->port.console && port->sysrq) { | |
674 | for (i = 0; i < len; i++, ch++) { | |
675 | if (!usb_serial_handle_sysrq_char(tty, port, *ch)) | |
676 | tty_insert_flip_char(tty, *ch, flag); | |
677 | } | |
678 | } else | |
679 | tty_insert_flip_string_fixed_flag(tty, ch, flag, len); | |
680 | ||
681 | return len; | |
682 | } | |
683 | ||
684 | static void ssu100_process_read_urb(struct urb *urb) | |
685 | { | |
686 | struct usb_serial_port *port = urb->context; | |
687 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
688 | char *data = (char *)urb->transfer_buffer; | |
689 | struct tty_struct *tty; | |
690 | int count = 0; | |
691 | int i; | |
692 | int len; | |
693 | ||
694 | dbg("%s", __func__); | |
695 | ||
696 | tty = tty_port_tty_get(&port->port); | |
697 | if (!tty) | |
698 | return; | |
699 | ||
700 | for (i = 0; i < urb->actual_length; i += priv->max_packet_size) { | |
701 | len = min_t(int, urb->actual_length - i, priv->max_packet_size); | |
702 | count += ssu100_process_packet(tty, port, priv, &data[i], len); | |
703 | } | |
704 | ||
705 | if (count) | |
706 | tty_flip_buffer_push(tty); | |
707 | tty_kref_put(tty); | |
708 | } | |
709 | ||
52af9545 BP |
710 | static struct usb_serial_driver ssu100_device = { |
711 | .driver = { | |
712 | .owner = THIS_MODULE, | |
713 | .name = "ssu100", | |
714 | }, | |
715 | .description = DRIVER_DESC, | |
716 | .id_table = id_table, | |
717 | .usb_driver = &ssu100_driver, | |
718 | .num_ports = 1, | |
719 | .bulk_in_size = 256, | |
720 | .bulk_out_size = 256, | |
721 | .open = ssu100_open, | |
722 | .close = ssu100_close, | |
723 | .attach = ssu100_attach, | |
724 | .release = ssu100_release, | |
725 | .dtr_rts = ssu100_dtr_rts, | |
726 | .process_read_urb = ssu100_process_read_urb, | |
727 | .tiocmget = ssu100_tiocmget, | |
728 | .tiocmset = ssu100_tiocmset, | |
729 | .ioctl = ssu100_ioctl, | |
730 | .set_termios = ssu100_set_termios, | |
85dee135 | 731 | .disconnect = usb_serial_generic_disconnect, |
52af9545 BP |
732 | }; |
733 | ||
734 | static int __init ssu100_init(void) | |
735 | { | |
736 | int retval; | |
737 | ||
738 | dbg("%s", __func__); | |
739 | ||
740 | /* register with usb-serial */ | |
741 | retval = usb_serial_register(&ssu100_device); | |
742 | ||
743 | if (retval) | |
744 | goto failed_usb_sio_register; | |
745 | ||
746 | retval = usb_register(&ssu100_driver); | |
747 | if (retval) | |
748 | goto failed_usb_register; | |
749 | ||
750 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" | |
751 | DRIVER_DESC "\n"); | |
752 | ||
753 | return 0; | |
754 | ||
755 | failed_usb_register: | |
756 | usb_serial_deregister(&ssu100_device); | |
757 | failed_usb_sio_register: | |
758 | return retval; | |
759 | } | |
760 | ||
761 | static void __exit ssu100_exit(void) | |
762 | { | |
763 | usb_deregister(&ssu100_driver); | |
764 | usb_serial_deregister(&ssu100_device); | |
765 | } | |
766 | ||
767 | module_init(ssu100_init); | |
768 | module_exit(ssu100_exit); | |
769 | ||
770 | MODULE_DESCRIPTION(DRIVER_DESC); | |
771 | MODULE_LICENSE("GPL"); | |
772 | ||
773 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
774 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |