Commit | Line | Data |
---|---|---|
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 | ||
90ab5ee9 | 49 | static bool 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 | }; | |
52af9545 BP |
62 | MODULE_DEVICE_TABLE(usb, id_table); |
63 | ||
52af9545 | 64 | struct ssu100_port_private { |
17523058 | 65 | spinlock_t status_lock; |
52af9545 BP |
66 | u8 shadowLSR; |
67 | u8 shadowMSR; | |
68 | wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ | |
f81c83db | 69 | struct async_icount icount; |
52af9545 BP |
70 | }; |
71 | ||
72 | static void ssu100_release(struct usb_serial *serial) | |
73 | { | |
74 | struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port); | |
75 | ||
52af9545 BP |
76 | kfree(priv); |
77 | } | |
78 | ||
79 | static inline int ssu100_control_msg(struct usb_device *dev, | |
80 | u8 request, u16 data, u16 index) | |
81 | { | |
82 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
83 | request, 0x40, data, index, | |
84 | NULL, 0, 300); | |
85 | } | |
86 | ||
87 | static inline int ssu100_setdevice(struct usb_device *dev, u8 *data) | |
88 | { | |
89 | u16 x = ((u16)(data[1] << 8) | (u16)(data[0])); | |
90 | ||
91 | return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
92 | } | |
93 | ||
94 | ||
95 | static inline int ssu100_getdevice(struct usb_device *dev, u8 *data) | |
96 | { | |
97 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
98 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
99 | data, 3, 300); | |
100 | } | |
101 | ||
102 | static inline int ssu100_getregister(struct usb_device *dev, | |
103 | unsigned short uart, | |
104 | unsigned short reg, | |
105 | u8 *data) | |
106 | { | |
107 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
108 | QT_SET_GET_REGISTER, 0xc0, reg, | |
109 | uart, data, sizeof(*data), 300); | |
110 | ||
111 | } | |
112 | ||
113 | ||
114 | static inline int ssu100_setregister(struct usb_device *dev, | |
115 | unsigned short uart, | |
556f1a0e | 116 | unsigned short reg, |
52af9545 BP |
117 | u16 data) |
118 | { | |
556f1a0e | 119 | u16 value = (data << 8) | reg; |
52af9545 BP |
120 | |
121 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
122 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
123 | NULL, 0, 300); | |
124 | ||
125 | } | |
126 | ||
127 | #define set_mctrl(dev, set) update_mctrl((dev), (set), 0) | |
128 | #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear)) | |
129 | ||
130 | /* these do not deal with device that have more than 1 port */ | |
131 | static inline int update_mctrl(struct usb_device *dev, unsigned int set, | |
132 | unsigned int clear) | |
133 | { | |
134 | unsigned urb_value; | |
135 | int result; | |
136 | ||
137 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
138 | dbg("%s - DTR|RTS not being set|cleared", __func__); | |
139 | return 0; /* no change */ | |
140 | } | |
141 | ||
142 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
143 | urb_value = 0; | |
144 | if (set & TIOCM_DTR) | |
79f203a2 | 145 | urb_value |= UART_MCR_DTR; |
52af9545 | 146 | if (set & TIOCM_RTS) |
79f203a2 | 147 | urb_value |= UART_MCR_RTS; |
52af9545 | 148 | |
556f1a0e | 149 | result = ssu100_setregister(dev, 0, UART_MCR, urb_value); |
52af9545 BP |
150 | if (result < 0) |
151 | dbg("%s Error from MODEM_CTRL urb", __func__); | |
152 | ||
153 | return result; | |
154 | } | |
155 | ||
156 | static int ssu100_initdevice(struct usb_device *dev) | |
157 | { | |
158 | u8 *data; | |
159 | int result = 0; | |
160 | ||
52af9545 BP |
161 | data = kzalloc(3, GFP_KERNEL); |
162 | if (!data) | |
163 | return -ENOMEM; | |
164 | ||
165 | result = ssu100_getdevice(dev, data); | |
166 | if (result < 0) { | |
167 | dbg("%s - get_device failed %i", __func__, result); | |
168 | goto out; | |
169 | } | |
170 | ||
171 | data[1] &= ~FULLPWRBIT; | |
172 | ||
173 | result = ssu100_setdevice(dev, data); | |
174 | if (result < 0) { | |
175 | dbg("%s - setdevice failed %i", __func__, result); | |
176 | goto out; | |
177 | } | |
178 | ||
179 | result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0); | |
180 | if (result < 0) { | |
181 | dbg("%s - set prebuffer level failed %i", __func__, result); | |
182 | goto out; | |
183 | } | |
184 | ||
185 | result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0); | |
186 | if (result < 0) { | |
187 | dbg("%s - set ATFprebuffer level failed %i", __func__, result); | |
188 | goto out; | |
189 | } | |
190 | ||
191 | result = ssu100_getdevice(dev, data); | |
192 | if (result < 0) { | |
193 | dbg("%s - get_device failed %i", __func__, result); | |
194 | goto out; | |
195 | } | |
196 | ||
197 | data[0] &= ~(RR_BITS | DUPMODE_BITS); | |
198 | data[0] |= CLKS_X4; | |
199 | data[1] &= ~(LOOPMODE_BITS); | |
200 | data[1] |= RS232_MODE; | |
201 | ||
202 | result = ssu100_setdevice(dev, data); | |
203 | if (result < 0) { | |
204 | dbg("%s - setdevice failed %i", __func__, result); | |
205 | goto out; | |
206 | } | |
207 | ||
208 | out: kfree(data); | |
209 | return result; | |
210 | ||
211 | } | |
212 | ||
213 | ||
214 | static void ssu100_set_termios(struct tty_struct *tty, | |
215 | struct usb_serial_port *port, | |
216 | struct ktermios *old_termios) | |
217 | { | |
218 | struct usb_device *dev = port->serial->dev; | |
219 | struct ktermios *termios = tty->termios; | |
220 | u16 baud, divisor, remainder; | |
221 | unsigned int cflag = termios->c_cflag; | |
222 | u16 urb_value = 0; /* will hold the new flags */ | |
223 | int result; | |
224 | ||
52af9545 BP |
225 | if (cflag & PARENB) { |
226 | if (cflag & PARODD) | |
79f203a2 | 227 | urb_value |= UART_LCR_PARITY; |
52af9545 BP |
228 | else |
229 | urb_value |= SERIAL_EVEN_PARITY; | |
230 | } | |
231 | ||
232 | switch (cflag & CSIZE) { | |
233 | case CS5: | |
79f203a2 | 234 | urb_value |= UART_LCR_WLEN5; |
52af9545 BP |
235 | break; |
236 | case CS6: | |
79f203a2 | 237 | urb_value |= UART_LCR_WLEN6; |
52af9545 BP |
238 | break; |
239 | case CS7: | |
79f203a2 | 240 | urb_value |= UART_LCR_WLEN7; |
52af9545 BP |
241 | break; |
242 | default: | |
243 | case CS8: | |
79f203a2 | 244 | urb_value |= UART_LCR_WLEN8; |
52af9545 BP |
245 | break; |
246 | } | |
247 | ||
248 | baud = tty_get_baud_rate(tty); | |
249 | if (!baud) | |
250 | baud = 9600; | |
251 | ||
252 | dbg("%s - got baud = %d\n", __func__, baud); | |
253 | ||
254 | ||
255 | divisor = MAX_BAUD_RATE / baud; | |
256 | remainder = MAX_BAUD_RATE % baud; | |
257 | if (((remainder * 2) >= baud) && (baud != 110)) | |
258 | divisor++; | |
259 | ||
260 | urb_value = urb_value << 8; | |
261 | ||
262 | result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value); | |
263 | if (result < 0) | |
264 | dbg("%s - set uart failed", __func__); | |
265 | ||
266 | if (cflag & CRTSCTS) | |
267 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
268 | SERIAL_CRTSCTS, 0); | |
269 | else | |
270 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
271 | 0, 0); | |
272 | if (result < 0) | |
273 | dbg("%s - set HW flow control failed", __func__); | |
274 | ||
275 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
276 | u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty))); | |
277 | ||
278 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
279 | x, 0); | |
280 | } else | |
281 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
282 | 0, 0); | |
283 | ||
284 | if (result < 0) | |
285 | dbg("%s - set SW flow control failed", __func__); | |
286 | ||
287 | } | |
288 | ||
289 | ||
290 | static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port) | |
291 | { | |
292 | struct usb_device *dev = port->serial->dev; | |
293 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
294 | u8 *data; | |
295 | int result; | |
17523058 | 296 | unsigned long flags; |
52af9545 | 297 | |
52af9545 BP |
298 | data = kzalloc(2, GFP_KERNEL); |
299 | if (!data) | |
300 | return -ENOMEM; | |
301 | ||
302 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
303 | QT_OPEN_CLOSE_CHANNEL, | |
304 | QT_TRANSFER_IN, 0x01, | |
305 | 0, data, 2, 300); | |
306 | if (result < 0) { | |
307 | dbg("%s - open failed %i", __func__, result); | |
308 | kfree(data); | |
309 | return result; | |
310 | } | |
311 | ||
17523058 | 312 | spin_lock_irqsave(&priv->status_lock, flags); |
f81c83db BP |
313 | priv->shadowLSR = data[0]; |
314 | priv->shadowMSR = data[1]; | |
17523058 | 315 | spin_unlock_irqrestore(&priv->status_lock, flags); |
52af9545 BP |
316 | |
317 | kfree(data); | |
318 | ||
319 | /* set to 9600 */ | |
320 | result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300); | |
321 | if (result < 0) | |
322 | dbg("%s - set uart failed", __func__); | |
323 | ||
324 | if (tty) | |
325 | ssu100_set_termios(tty, port, tty->termios); | |
326 | ||
327 | return usb_serial_generic_open(tty, port); | |
328 | } | |
329 | ||
330 | static void ssu100_close(struct usb_serial_port *port) | |
331 | { | |
52af9545 BP |
332 | usb_serial_generic_close(port); |
333 | } | |
334 | ||
335 | static int get_serial_info(struct usb_serial_port *port, | |
336 | struct serial_struct __user *retinfo) | |
337 | { | |
338 | struct serial_struct tmp; | |
339 | ||
340 | if (!retinfo) | |
341 | return -EFAULT; | |
342 | ||
343 | memset(&tmp, 0, sizeof(tmp)); | |
344 | tmp.line = port->serial->minor; | |
345 | tmp.port = 0; | |
346 | tmp.irq = 0; | |
347 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
348 | tmp.xmit_fifo_size = port->bulk_out_size; | |
349 | tmp.baud_base = 9600; | |
350 | tmp.close_delay = 5*HZ; | |
351 | tmp.closing_wait = 30*HZ; | |
352 | ||
353 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
354 | return -EFAULT; | |
355 | return 0; | |
356 | } | |
357 | ||
f81c83db BP |
358 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) |
359 | { | |
360 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
361 | struct async_icount prev, cur; | |
362 | unsigned long flags; | |
363 | ||
364 | spin_lock_irqsave(&priv->status_lock, flags); | |
365 | prev = priv->icount; | |
366 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
367 | ||
368 | while (1) { | |
369 | wait_event_interruptible(priv->delta_msr_wait, | |
370 | ((priv->icount.rng != prev.rng) || | |
371 | (priv->icount.dsr != prev.dsr) || | |
372 | (priv->icount.dcd != prev.dcd) || | |
373 | (priv->icount.cts != prev.cts))); | |
374 | ||
375 | if (signal_pending(current)) | |
376 | return -ERESTARTSYS; | |
377 | ||
378 | spin_lock_irqsave(&priv->status_lock, flags); | |
379 | cur = priv->icount; | |
380 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
381 | ||
382 | if ((prev.rng == cur.rng) && | |
383 | (prev.dsr == cur.dsr) && | |
384 | (prev.dcd == cur.dcd) && | |
385 | (prev.cts == cur.cts)) | |
386 | return -EIO; | |
387 | ||
388 | if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) || | |
389 | (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) || | |
390 | (arg & TIOCM_CD && (prev.dcd != cur.dcd)) || | |
391 | (arg & TIOCM_CTS && (prev.cts != cur.cts))) | |
392 | return 0; | |
393 | } | |
394 | return 0; | |
395 | } | |
396 | ||
0bca1b91 AC |
397 | static int ssu100_get_icount(struct tty_struct *tty, |
398 | struct serial_icounter_struct *icount) | |
399 | { | |
400 | struct usb_serial_port *port = tty->driver_data; | |
401 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
402 | struct async_icount cnow = priv->icount; | |
403 | ||
404 | icount->cts = cnow.cts; | |
405 | icount->dsr = cnow.dsr; | |
406 | icount->rng = cnow.rng; | |
407 | icount->dcd = cnow.dcd; | |
408 | icount->rx = cnow.rx; | |
409 | icount->tx = cnow.tx; | |
410 | icount->frame = cnow.frame; | |
411 | icount->overrun = cnow.overrun; | |
412 | icount->parity = cnow.parity; | |
413 | icount->brk = cnow.brk; | |
414 | icount->buf_overrun = cnow.buf_overrun; | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | ||
420 | ||
00a0d0d6 | 421 | static int ssu100_ioctl(struct tty_struct *tty, |
52af9545 BP |
422 | unsigned int cmd, unsigned long arg) |
423 | { | |
424 | struct usb_serial_port *port = tty->driver_data; | |
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 | ||
52af9545 BP |
436 | default: |
437 | break; | |
438 | } | |
439 | ||
440 | dbg("%s arg not supported", __func__); | |
441 | ||
442 | return -ENOIOCTLCMD; | |
443 | } | |
444 | ||
52af9545 BP |
445 | static int ssu100_attach(struct usb_serial *serial) |
446 | { | |
447 | struct ssu100_port_private *priv; | |
448 | struct usb_serial_port *port = *serial->port; | |
449 | ||
52af9545 BP |
450 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
451 | if (!priv) { | |
452 | dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__, | |
453 | sizeof(*priv)); | |
454 | return -ENOMEM; | |
455 | } | |
456 | ||
17523058 | 457 | spin_lock_init(&priv->status_lock); |
52af9545 BP |
458 | init_waitqueue_head(&priv->delta_msr_wait); |
459 | usb_set_serial_port_data(port, priv); | |
52af9545 BP |
460 | |
461 | return ssu100_initdevice(serial->dev); | |
462 | } | |
463 | ||
60b33c13 | 464 | static int ssu100_tiocmget(struct tty_struct *tty) |
52af9545 BP |
465 | { |
466 | struct usb_serial_port *port = tty->driver_data; | |
467 | struct usb_device *dev = port->serial->dev; | |
468 | u8 *d; | |
469 | int r; | |
470 | ||
52af9545 BP |
471 | d = kzalloc(2, GFP_KERNEL); |
472 | if (!d) | |
473 | return -ENOMEM; | |
474 | ||
79f203a2 | 475 | r = ssu100_getregister(dev, 0, UART_MCR, d); |
52af9545 BP |
476 | if (r < 0) |
477 | goto mget_out; | |
478 | ||
79f203a2 | 479 | r = ssu100_getregister(dev, 0, UART_MSR, d+1); |
52af9545 BP |
480 | if (r < 0) |
481 | goto mget_out; | |
482 | ||
79f203a2 BP |
483 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | |
484 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
485 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
486 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
487 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
488 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
52af9545 BP |
489 | |
490 | mget_out: | |
491 | kfree(d); | |
492 | return r; | |
493 | } | |
494 | ||
20b9d177 | 495 | static int ssu100_tiocmset(struct tty_struct *tty, |
52af9545 BP |
496 | unsigned int set, unsigned int clear) |
497 | { | |
498 | struct usb_serial_port *port = tty->driver_data; | |
499 | struct usb_device *dev = port->serial->dev; | |
500 | ||
52af9545 BP |
501 | return update_mctrl(dev, set, clear); |
502 | } | |
503 | ||
504 | static void ssu100_dtr_rts(struct usb_serial_port *port, int on) | |
505 | { | |
506 | struct usb_device *dev = port->serial->dev; | |
507 | ||
52af9545 BP |
508 | mutex_lock(&port->serial->disc_mutex); |
509 | if (!port->serial->disconnected) { | |
510 | /* Disable flow control */ | |
511 | if (!on && | |
556f1a0e | 512 | ssu100_setregister(dev, 0, UART_MCR, 0) < 0) |
52af9545 BP |
513 | dev_err(&port->dev, "error from flowcontrol urb\n"); |
514 | /* drop RTS and DTR */ | |
515 | if (on) | |
516 | set_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
517 | else | |
518 | clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
519 | } | |
520 | mutex_unlock(&port->serial->disc_mutex); | |
521 | } | |
522 | ||
f81c83db BP |
523 | static void ssu100_update_msr(struct usb_serial_port *port, u8 msr) |
524 | { | |
525 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
526 | unsigned long flags; | |
527 | ||
528 | spin_lock_irqsave(&priv->status_lock, flags); | |
529 | priv->shadowMSR = msr; | |
530 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
531 | ||
532 | if (msr & UART_MSR_ANY_DELTA) { | |
533 | /* update input line counters */ | |
534 | if (msr & UART_MSR_DCTS) | |
535 | priv->icount.cts++; | |
536 | if (msr & UART_MSR_DDSR) | |
537 | priv->icount.dsr++; | |
538 | if (msr & UART_MSR_DDCD) | |
539 | priv->icount.dcd++; | |
540 | if (msr & UART_MSR_TERI) | |
541 | priv->icount.rng++; | |
542 | wake_up_interruptible(&priv->delta_msr_wait); | |
543 | } | |
544 | } | |
545 | ||
6b8f1ca5 BP |
546 | static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr, |
547 | char *tty_flag) | |
f81c83db BP |
548 | { |
549 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
550 | unsigned long flags; | |
551 | ||
552 | spin_lock_irqsave(&priv->status_lock, flags); | |
553 | priv->shadowLSR = lsr; | |
554 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
555 | ||
6b8f1ca5 | 556 | *tty_flag = TTY_NORMAL; |
f81c83db | 557 | if (lsr & UART_LSR_BRK_ERROR_BITS) { |
6b8f1ca5 BP |
558 | /* we always want to update icount, but we only want to |
559 | * update tty_flag for one case */ | |
560 | if (lsr & UART_LSR_BI) { | |
f81c83db | 561 | priv->icount.brk++; |
6b8f1ca5 BP |
562 | *tty_flag = TTY_BREAK; |
563 | usb_serial_handle_break(port); | |
564 | } | |
565 | if (lsr & UART_LSR_PE) { | |
f81c83db | 566 | priv->icount.parity++; |
6b8f1ca5 BP |
567 | if (*tty_flag == TTY_NORMAL) |
568 | *tty_flag = TTY_PARITY; | |
569 | } | |
570 | if (lsr & UART_LSR_FE) { | |
571 | priv->icount.frame++; | |
572 | if (*tty_flag == TTY_NORMAL) | |
573 | *tty_flag = TTY_FRAME; | |
574 | } | |
575 | if (lsr & UART_LSR_OE){ | |
f81c83db | 576 | priv->icount.overrun++; |
6b8f1ca5 BP |
577 | if (*tty_flag == TTY_NORMAL) |
578 | *tty_flag = TTY_OVERRUN; | |
579 | } | |
f81c83db | 580 | } |
6b8f1ca5 | 581 | |
f81c83db BP |
582 | } |
583 | ||
f7043ecb BP |
584 | static int ssu100_process_packet(struct urb *urb, |
585 | struct tty_struct *tty) | |
52af9545 | 586 | { |
f7043ecb BP |
587 | struct usb_serial_port *port = urb->context; |
588 | char *packet = (char *)urb->transfer_buffer; | |
6b8f1ca5 | 589 | char flag = TTY_NORMAL; |
f7043ecb BP |
590 | u32 len = urb->actual_length; |
591 | int i; | |
52af9545 BP |
592 | char *ch; |
593 | ||
9b2cef31 BP |
594 | if ((len >= 4) && |
595 | (packet[0] == 0x1b) && (packet[1] == 0x1b) && | |
52af9545 | 596 | ((packet[2] == 0x00) || (packet[2] == 0x01))) { |
6b8f1ca5 BP |
597 | if (packet[2] == 0x00) { |
598 | ssu100_update_lsr(port, packet[3], &flag); | |
599 | if (flag == TTY_OVERRUN) | |
600 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
601 | } | |
f81c83db BP |
602 | if (packet[2] == 0x01) |
603 | ssu100_update_msr(port, packet[3]); | |
52af9545 BP |
604 | |
605 | len -= 4; | |
606 | ch = packet + 4; | |
607 | } else | |
608 | ch = packet; | |
609 | ||
610 | if (!len) | |
611 | return 0; /* status only */ | |
612 | ||
613 | if (port->port.console && port->sysrq) { | |
614 | for (i = 0; i < len; i++, ch++) { | |
6ee9f4b4 | 615 | if (!usb_serial_handle_sysrq_char(port, *ch)) |
52af9545 BP |
616 | tty_insert_flip_char(tty, *ch, flag); |
617 | } | |
618 | } else | |
619 | tty_insert_flip_string_fixed_flag(tty, ch, flag, len); | |
620 | ||
621 | return len; | |
622 | } | |
623 | ||
624 | static void ssu100_process_read_urb(struct urb *urb) | |
625 | { | |
626 | struct usb_serial_port *port = urb->context; | |
52af9545 | 627 | struct tty_struct *tty; |
f7043ecb | 628 | int count; |
52af9545 | 629 | |
52af9545 BP |
630 | tty = tty_port_tty_get(&port->port); |
631 | if (!tty) | |
632 | return; | |
633 | ||
f7043ecb | 634 | count = ssu100_process_packet(urb, tty); |
52af9545 BP |
635 | |
636 | if (count) | |
637 | tty_flip_buffer_push(tty); | |
638 | tty_kref_put(tty); | |
639 | } | |
640 | ||
52af9545 BP |
641 | static struct usb_serial_driver ssu100_device = { |
642 | .driver = { | |
643 | .owner = THIS_MODULE, | |
644 | .name = "ssu100", | |
645 | }, | |
646 | .description = DRIVER_DESC, | |
647 | .id_table = id_table, | |
52af9545 | 648 | .num_ports = 1, |
52af9545 BP |
649 | .open = ssu100_open, |
650 | .close = ssu100_close, | |
651 | .attach = ssu100_attach, | |
652 | .release = ssu100_release, | |
653 | .dtr_rts = ssu100_dtr_rts, | |
654 | .process_read_urb = ssu100_process_read_urb, | |
655 | .tiocmget = ssu100_tiocmget, | |
656 | .tiocmset = ssu100_tiocmset, | |
0bca1b91 | 657 | .get_icount = ssu100_get_icount, |
52af9545 BP |
658 | .ioctl = ssu100_ioctl, |
659 | .set_termios = ssu100_set_termios, | |
85dee135 | 660 | .disconnect = usb_serial_generic_disconnect, |
52af9545 BP |
661 | }; |
662 | ||
d860322f AS |
663 | static struct usb_serial_driver * const serial_drivers[] = { |
664 | &ssu100_device, NULL | |
665 | }; | |
666 | ||
68e24113 | 667 | module_usb_serial_driver(serial_drivers, id_table); |
52af9545 BP |
668 | |
669 | MODULE_DESCRIPTION(DRIVER_DESC); | |
670 | MODULE_LICENSE("GPL"); | |
671 | ||
672 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
673 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |