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 | ||
52af9545 BP |
49 | /* Version Information */ |
50 | #define DRIVER_VERSION "v0.1" | |
51 | #define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver" | |
52 | ||
53 | #define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */ | |
54 | #define QUATECH_SSU100 0xC020 /* SSU100 */ | |
55 | ||
56 | static const struct usb_device_id id_table[] = { | |
57 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)}, | |
58 | {} /* Terminating entry */ | |
59 | }; | |
52af9545 BP |
60 | MODULE_DEVICE_TABLE(usb, id_table); |
61 | ||
52af9545 | 62 | struct ssu100_port_private { |
17523058 | 63 | spinlock_t status_lock; |
52af9545 BP |
64 | u8 shadowLSR; |
65 | u8 shadowMSR; | |
66 | wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ | |
f81c83db | 67 | struct async_icount icount; |
52af9545 BP |
68 | }; |
69 | ||
70 | static void ssu100_release(struct usb_serial *serial) | |
71 | { | |
72 | struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port); | |
73 | ||
52af9545 BP |
74 | kfree(priv); |
75 | } | |
76 | ||
77 | static inline int ssu100_control_msg(struct usb_device *dev, | |
78 | u8 request, u16 data, u16 index) | |
79 | { | |
80 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
81 | request, 0x40, data, index, | |
82 | NULL, 0, 300); | |
83 | } | |
84 | ||
85 | static inline int ssu100_setdevice(struct usb_device *dev, u8 *data) | |
86 | { | |
87 | u16 x = ((u16)(data[1] << 8) | (u16)(data[0])); | |
88 | ||
89 | return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
90 | } | |
91 | ||
92 | ||
93 | static inline int ssu100_getdevice(struct usb_device *dev, u8 *data) | |
94 | { | |
95 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
96 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
97 | data, 3, 300); | |
98 | } | |
99 | ||
100 | static inline int ssu100_getregister(struct usb_device *dev, | |
101 | unsigned short uart, | |
102 | unsigned short reg, | |
103 | u8 *data) | |
104 | { | |
105 | return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
106 | QT_SET_GET_REGISTER, 0xc0, reg, | |
107 | uart, data, sizeof(*data), 300); | |
108 | ||
109 | } | |
110 | ||
111 | ||
112 | static inline int ssu100_setregister(struct usb_device *dev, | |
113 | unsigned short uart, | |
556f1a0e | 114 | unsigned short reg, |
52af9545 BP |
115 | u16 data) |
116 | { | |
556f1a0e | 117 | u16 value = (data << 8) | reg; |
52af9545 BP |
118 | |
119 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
120 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
121 | NULL, 0, 300); | |
122 | ||
123 | } | |
124 | ||
125 | #define set_mctrl(dev, set) update_mctrl((dev), (set), 0) | |
126 | #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear)) | |
127 | ||
128 | /* these do not deal with device that have more than 1 port */ | |
129 | static inline int update_mctrl(struct usb_device *dev, unsigned int set, | |
130 | unsigned int clear) | |
131 | { | |
132 | unsigned urb_value; | |
133 | int result; | |
134 | ||
135 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
4f0c6412 | 136 | dev_dbg(&dev->dev, "%s - DTR|RTS not being set|cleared\n", __func__); |
52af9545 BP |
137 | return 0; /* no change */ |
138 | } | |
139 | ||
140 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
141 | urb_value = 0; | |
142 | if (set & TIOCM_DTR) | |
79f203a2 | 143 | urb_value |= UART_MCR_DTR; |
52af9545 | 144 | if (set & TIOCM_RTS) |
79f203a2 | 145 | urb_value |= UART_MCR_RTS; |
52af9545 | 146 | |
556f1a0e | 147 | result = ssu100_setregister(dev, 0, UART_MCR, urb_value); |
52af9545 | 148 | if (result < 0) |
4f0c6412 | 149 | dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__); |
52af9545 BP |
150 | |
151 | return result; | |
152 | } | |
153 | ||
154 | static int ssu100_initdevice(struct usb_device *dev) | |
155 | { | |
156 | u8 *data; | |
157 | int result = 0; | |
158 | ||
52af9545 BP |
159 | data = kzalloc(3, GFP_KERNEL); |
160 | if (!data) | |
161 | return -ENOMEM; | |
162 | ||
163 | result = ssu100_getdevice(dev, data); | |
164 | if (result < 0) { | |
4f0c6412 | 165 | dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result); |
52af9545 BP |
166 | goto out; |
167 | } | |
168 | ||
169 | data[1] &= ~FULLPWRBIT; | |
170 | ||
171 | result = ssu100_setdevice(dev, data); | |
172 | if (result < 0) { | |
4f0c6412 | 173 | dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result); |
52af9545 BP |
174 | goto out; |
175 | } | |
176 | ||
177 | result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0); | |
178 | if (result < 0) { | |
4f0c6412 | 179 | dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result); |
52af9545 BP |
180 | goto out; |
181 | } | |
182 | ||
183 | result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0); | |
184 | if (result < 0) { | |
4f0c6412 | 185 | dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result); |
52af9545 BP |
186 | goto out; |
187 | } | |
188 | ||
189 | result = ssu100_getdevice(dev, data); | |
190 | if (result < 0) { | |
4f0c6412 | 191 | dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result); |
52af9545 BP |
192 | goto out; |
193 | } | |
194 | ||
195 | data[0] &= ~(RR_BITS | DUPMODE_BITS); | |
196 | data[0] |= CLKS_X4; | |
197 | data[1] &= ~(LOOPMODE_BITS); | |
198 | data[1] |= RS232_MODE; | |
199 | ||
200 | result = ssu100_setdevice(dev, data); | |
201 | if (result < 0) { | |
4f0c6412 | 202 | dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result); |
52af9545 BP |
203 | goto out; |
204 | } | |
205 | ||
206 | out: kfree(data); | |
207 | return result; | |
208 | ||
209 | } | |
210 | ||
211 | ||
212 | static void ssu100_set_termios(struct tty_struct *tty, | |
213 | struct usb_serial_port *port, | |
214 | struct ktermios *old_termios) | |
215 | { | |
216 | struct usb_device *dev = port->serial->dev; | |
adc8d746 | 217 | struct ktermios *termios = &tty->termios; |
52af9545 BP |
218 | u16 baud, divisor, remainder; |
219 | unsigned int cflag = termios->c_cflag; | |
220 | u16 urb_value = 0; /* will hold the new flags */ | |
221 | int result; | |
222 | ||
52af9545 BP |
223 | if (cflag & PARENB) { |
224 | if (cflag & PARODD) | |
79f203a2 | 225 | urb_value |= UART_LCR_PARITY; |
52af9545 BP |
226 | else |
227 | urb_value |= SERIAL_EVEN_PARITY; | |
228 | } | |
229 | ||
230 | switch (cflag & CSIZE) { | |
231 | case CS5: | |
79f203a2 | 232 | urb_value |= UART_LCR_WLEN5; |
52af9545 BP |
233 | break; |
234 | case CS6: | |
79f203a2 | 235 | urb_value |= UART_LCR_WLEN6; |
52af9545 BP |
236 | break; |
237 | case CS7: | |
79f203a2 | 238 | urb_value |= UART_LCR_WLEN7; |
52af9545 BP |
239 | break; |
240 | default: | |
241 | case CS8: | |
79f203a2 | 242 | urb_value |= UART_LCR_WLEN8; |
52af9545 BP |
243 | break; |
244 | } | |
245 | ||
246 | baud = tty_get_baud_rate(tty); | |
247 | if (!baud) | |
248 | baud = 9600; | |
249 | ||
4f0c6412 | 250 | dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud); |
52af9545 BP |
251 | |
252 | ||
253 | divisor = MAX_BAUD_RATE / baud; | |
254 | remainder = MAX_BAUD_RATE % baud; | |
255 | if (((remainder * 2) >= baud) && (baud != 110)) | |
256 | divisor++; | |
257 | ||
258 | urb_value = urb_value << 8; | |
259 | ||
260 | result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value); | |
261 | if (result < 0) | |
4f0c6412 | 262 | dev_dbg(&port->dev, "%s - set uart failed\n", __func__); |
52af9545 BP |
263 | |
264 | if (cflag & CRTSCTS) | |
265 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
266 | SERIAL_CRTSCTS, 0); | |
267 | else | |
268 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
269 | 0, 0); | |
270 | if (result < 0) | |
4f0c6412 | 271 | dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__); |
52af9545 BP |
272 | |
273 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
274 | u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty))); | |
275 | ||
276 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
277 | x, 0); | |
278 | } else | |
279 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
280 | 0, 0); | |
281 | ||
282 | if (result < 0) | |
4f0c6412 | 283 | dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__); |
52af9545 BP |
284 | |
285 | } | |
286 | ||
287 | ||
288 | static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port) | |
289 | { | |
290 | struct usb_device *dev = port->serial->dev; | |
291 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
292 | u8 *data; | |
293 | int result; | |
17523058 | 294 | unsigned long flags; |
52af9545 | 295 | |
52af9545 BP |
296 | data = kzalloc(2, GFP_KERNEL); |
297 | if (!data) | |
298 | return -ENOMEM; | |
299 | ||
300 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
301 | QT_OPEN_CLOSE_CHANNEL, | |
302 | QT_TRANSFER_IN, 0x01, | |
303 | 0, data, 2, 300); | |
304 | if (result < 0) { | |
4f0c6412 | 305 | dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result); |
52af9545 BP |
306 | kfree(data); |
307 | return result; | |
308 | } | |
309 | ||
17523058 | 310 | spin_lock_irqsave(&priv->status_lock, flags); |
f81c83db BP |
311 | priv->shadowLSR = data[0]; |
312 | priv->shadowMSR = data[1]; | |
17523058 | 313 | spin_unlock_irqrestore(&priv->status_lock, flags); |
52af9545 BP |
314 | |
315 | kfree(data); | |
316 | ||
317 | /* set to 9600 */ | |
318 | result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300); | |
319 | if (result < 0) | |
4f0c6412 | 320 | dev_dbg(&port->dev, "%s - set uart failed\n", __func__); |
52af9545 BP |
321 | |
322 | if (tty) | |
adc8d746 | 323 | ssu100_set_termios(tty, port, &tty->termios); |
52af9545 BP |
324 | |
325 | return usb_serial_generic_open(tty, port); | |
326 | } | |
327 | ||
328 | static void ssu100_close(struct usb_serial_port *port) | |
329 | { | |
52af9545 BP |
330 | usb_serial_generic_close(port); |
331 | } | |
332 | ||
333 | static int get_serial_info(struct usb_serial_port *port, | |
334 | struct serial_struct __user *retinfo) | |
335 | { | |
336 | struct serial_struct tmp; | |
337 | ||
338 | if (!retinfo) | |
339 | return -EFAULT; | |
340 | ||
341 | memset(&tmp, 0, sizeof(tmp)); | |
342 | tmp.line = port->serial->minor; | |
343 | tmp.port = 0; | |
344 | tmp.irq = 0; | |
345 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
346 | tmp.xmit_fifo_size = port->bulk_out_size; | |
347 | tmp.baud_base = 9600; | |
348 | tmp.close_delay = 5*HZ; | |
349 | tmp.closing_wait = 30*HZ; | |
350 | ||
351 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
352 | return -EFAULT; | |
353 | return 0; | |
354 | } | |
355 | ||
f81c83db BP |
356 | static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) |
357 | { | |
358 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
359 | struct async_icount prev, cur; | |
360 | unsigned long flags; | |
361 | ||
362 | spin_lock_irqsave(&priv->status_lock, flags); | |
363 | prev = priv->icount; | |
364 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
365 | ||
366 | while (1) { | |
367 | wait_event_interruptible(priv->delta_msr_wait, | |
368 | ((priv->icount.rng != prev.rng) || | |
369 | (priv->icount.dsr != prev.dsr) || | |
370 | (priv->icount.dcd != prev.dcd) || | |
371 | (priv->icount.cts != prev.cts))); | |
372 | ||
373 | if (signal_pending(current)) | |
374 | return -ERESTARTSYS; | |
375 | ||
376 | spin_lock_irqsave(&priv->status_lock, flags); | |
377 | cur = priv->icount; | |
378 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
379 | ||
380 | if ((prev.rng == cur.rng) && | |
381 | (prev.dsr == cur.dsr) && | |
382 | (prev.dcd == cur.dcd) && | |
383 | (prev.cts == cur.cts)) | |
384 | return -EIO; | |
385 | ||
386 | if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) || | |
387 | (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) || | |
388 | (arg & TIOCM_CD && (prev.dcd != cur.dcd)) || | |
389 | (arg & TIOCM_CTS && (prev.cts != cur.cts))) | |
390 | return 0; | |
391 | } | |
392 | return 0; | |
393 | } | |
394 | ||
0bca1b91 AC |
395 | static int ssu100_get_icount(struct tty_struct *tty, |
396 | struct serial_icounter_struct *icount) | |
397 | { | |
398 | struct usb_serial_port *port = tty->driver_data; | |
399 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
400 | struct async_icount cnow = priv->icount; | |
401 | ||
402 | icount->cts = cnow.cts; | |
403 | icount->dsr = cnow.dsr; | |
404 | icount->rng = cnow.rng; | |
405 | icount->dcd = cnow.dcd; | |
406 | icount->rx = cnow.rx; | |
407 | icount->tx = cnow.tx; | |
408 | icount->frame = cnow.frame; | |
409 | icount->overrun = cnow.overrun; | |
410 | icount->parity = cnow.parity; | |
411 | icount->brk = cnow.brk; | |
412 | icount->buf_overrun = cnow.buf_overrun; | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | ||
418 | ||
00a0d0d6 | 419 | static int ssu100_ioctl(struct tty_struct *tty, |
52af9545 BP |
420 | unsigned int cmd, unsigned long arg) |
421 | { | |
422 | struct usb_serial_port *port = tty->driver_data; | |
52af9545 | 423 | |
4f0c6412 | 424 | dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd); |
52af9545 BP |
425 | |
426 | switch (cmd) { | |
427 | case TIOCGSERIAL: | |
428 | return get_serial_info(port, | |
429 | (struct serial_struct __user *) arg); | |
430 | ||
431 | case TIOCMIWAIT: | |
f81c83db BP |
432 | return wait_modem_info(port, arg); |
433 | ||
52af9545 BP |
434 | default: |
435 | break; | |
436 | } | |
437 | ||
4f0c6412 | 438 | dev_dbg(&port->dev, "%s arg not supported\n", __func__); |
52af9545 BP |
439 | |
440 | return -ENOIOCTLCMD; | |
441 | } | |
442 | ||
52af9545 BP |
443 | static int ssu100_attach(struct usb_serial *serial) |
444 | { | |
445 | struct ssu100_port_private *priv; | |
446 | struct usb_serial_port *port = *serial->port; | |
447 | ||
52af9545 BP |
448 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
449 | if (!priv) { | |
450 | dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__, | |
451 | sizeof(*priv)); | |
452 | return -ENOMEM; | |
453 | } | |
454 | ||
17523058 | 455 | spin_lock_init(&priv->status_lock); |
52af9545 BP |
456 | init_waitqueue_head(&priv->delta_msr_wait); |
457 | usb_set_serial_port_data(port, priv); | |
52af9545 BP |
458 | |
459 | return ssu100_initdevice(serial->dev); | |
460 | } | |
461 | ||
60b33c13 | 462 | static int ssu100_tiocmget(struct tty_struct *tty) |
52af9545 BP |
463 | { |
464 | struct usb_serial_port *port = tty->driver_data; | |
465 | struct usb_device *dev = port->serial->dev; | |
466 | u8 *d; | |
467 | int r; | |
468 | ||
52af9545 BP |
469 | d = kzalloc(2, GFP_KERNEL); |
470 | if (!d) | |
471 | return -ENOMEM; | |
472 | ||
79f203a2 | 473 | r = ssu100_getregister(dev, 0, UART_MCR, d); |
52af9545 BP |
474 | if (r < 0) |
475 | goto mget_out; | |
476 | ||
79f203a2 | 477 | r = ssu100_getregister(dev, 0, UART_MSR, d+1); |
52af9545 BP |
478 | if (r < 0) |
479 | goto mget_out; | |
480 | ||
79f203a2 BP |
481 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | |
482 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
483 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
484 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
485 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
486 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
52af9545 BP |
487 | |
488 | mget_out: | |
489 | kfree(d); | |
490 | return r; | |
491 | } | |
492 | ||
20b9d177 | 493 | static int ssu100_tiocmset(struct tty_struct *tty, |
52af9545 BP |
494 | unsigned int set, unsigned int clear) |
495 | { | |
496 | struct usb_serial_port *port = tty->driver_data; | |
497 | struct usb_device *dev = port->serial->dev; | |
498 | ||
52af9545 BP |
499 | return update_mctrl(dev, set, clear); |
500 | } | |
501 | ||
502 | static void ssu100_dtr_rts(struct usb_serial_port *port, int on) | |
503 | { | |
504 | struct usb_device *dev = port->serial->dev; | |
505 | ||
52af9545 BP |
506 | mutex_lock(&port->serial->disc_mutex); |
507 | if (!port->serial->disconnected) { | |
508 | /* Disable flow control */ | |
509 | if (!on && | |
556f1a0e | 510 | ssu100_setregister(dev, 0, UART_MCR, 0) < 0) |
52af9545 BP |
511 | dev_err(&port->dev, "error from flowcontrol urb\n"); |
512 | /* drop RTS and DTR */ | |
513 | if (on) | |
514 | set_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
515 | else | |
516 | clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
517 | } | |
518 | mutex_unlock(&port->serial->disc_mutex); | |
519 | } | |
520 | ||
f81c83db BP |
521 | static void ssu100_update_msr(struct usb_serial_port *port, u8 msr) |
522 | { | |
523 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
524 | unsigned long flags; | |
525 | ||
526 | spin_lock_irqsave(&priv->status_lock, flags); | |
527 | priv->shadowMSR = msr; | |
528 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
529 | ||
530 | if (msr & UART_MSR_ANY_DELTA) { | |
531 | /* update input line counters */ | |
532 | if (msr & UART_MSR_DCTS) | |
533 | priv->icount.cts++; | |
534 | if (msr & UART_MSR_DDSR) | |
535 | priv->icount.dsr++; | |
536 | if (msr & UART_MSR_DDCD) | |
537 | priv->icount.dcd++; | |
538 | if (msr & UART_MSR_TERI) | |
539 | priv->icount.rng++; | |
540 | wake_up_interruptible(&priv->delta_msr_wait); | |
541 | } | |
542 | } | |
543 | ||
6b8f1ca5 BP |
544 | static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr, |
545 | char *tty_flag) | |
f81c83db BP |
546 | { |
547 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
548 | unsigned long flags; | |
549 | ||
550 | spin_lock_irqsave(&priv->status_lock, flags); | |
551 | priv->shadowLSR = lsr; | |
552 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
553 | ||
6b8f1ca5 | 554 | *tty_flag = TTY_NORMAL; |
f81c83db | 555 | if (lsr & UART_LSR_BRK_ERROR_BITS) { |
6b8f1ca5 BP |
556 | /* we always want to update icount, but we only want to |
557 | * update tty_flag for one case */ | |
558 | if (lsr & UART_LSR_BI) { | |
f81c83db | 559 | priv->icount.brk++; |
6b8f1ca5 BP |
560 | *tty_flag = TTY_BREAK; |
561 | usb_serial_handle_break(port); | |
562 | } | |
563 | if (lsr & UART_LSR_PE) { | |
f81c83db | 564 | priv->icount.parity++; |
6b8f1ca5 BP |
565 | if (*tty_flag == TTY_NORMAL) |
566 | *tty_flag = TTY_PARITY; | |
567 | } | |
568 | if (lsr & UART_LSR_FE) { | |
569 | priv->icount.frame++; | |
570 | if (*tty_flag == TTY_NORMAL) | |
571 | *tty_flag = TTY_FRAME; | |
572 | } | |
573 | if (lsr & UART_LSR_OE){ | |
f81c83db | 574 | priv->icount.overrun++; |
6b8f1ca5 BP |
575 | if (*tty_flag == TTY_NORMAL) |
576 | *tty_flag = TTY_OVERRUN; | |
577 | } | |
f81c83db | 578 | } |
6b8f1ca5 | 579 | |
f81c83db BP |
580 | } |
581 | ||
f7043ecb BP |
582 | static int ssu100_process_packet(struct urb *urb, |
583 | struct tty_struct *tty) | |
52af9545 | 584 | { |
f7043ecb BP |
585 | struct usb_serial_port *port = urb->context; |
586 | char *packet = (char *)urb->transfer_buffer; | |
6b8f1ca5 | 587 | char flag = TTY_NORMAL; |
f7043ecb BP |
588 | u32 len = urb->actual_length; |
589 | int i; | |
52af9545 BP |
590 | char *ch; |
591 | ||
9b2cef31 BP |
592 | if ((len >= 4) && |
593 | (packet[0] == 0x1b) && (packet[1] == 0x1b) && | |
52af9545 | 594 | ((packet[2] == 0x00) || (packet[2] == 0x01))) { |
6b8f1ca5 BP |
595 | if (packet[2] == 0x00) { |
596 | ssu100_update_lsr(port, packet[3], &flag); | |
597 | if (flag == TTY_OVERRUN) | |
598 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
599 | } | |
f81c83db BP |
600 | if (packet[2] == 0x01) |
601 | ssu100_update_msr(port, packet[3]); | |
52af9545 BP |
602 | |
603 | len -= 4; | |
604 | ch = packet + 4; | |
605 | } else | |
606 | ch = packet; | |
607 | ||
608 | if (!len) | |
609 | return 0; /* status only */ | |
610 | ||
611 | if (port->port.console && port->sysrq) { | |
612 | for (i = 0; i < len; i++, ch++) { | |
6ee9f4b4 | 613 | if (!usb_serial_handle_sysrq_char(port, *ch)) |
52af9545 BP |
614 | tty_insert_flip_char(tty, *ch, flag); |
615 | } | |
616 | } else | |
617 | tty_insert_flip_string_fixed_flag(tty, ch, flag, len); | |
618 | ||
619 | return len; | |
620 | } | |
621 | ||
622 | static void ssu100_process_read_urb(struct urb *urb) | |
623 | { | |
624 | struct usb_serial_port *port = urb->context; | |
52af9545 | 625 | struct tty_struct *tty; |
f7043ecb | 626 | int count; |
52af9545 | 627 | |
52af9545 BP |
628 | tty = tty_port_tty_get(&port->port); |
629 | if (!tty) | |
630 | return; | |
631 | ||
f7043ecb | 632 | count = ssu100_process_packet(urb, tty); |
52af9545 BP |
633 | |
634 | if (count) | |
635 | tty_flip_buffer_push(tty); | |
636 | tty_kref_put(tty); | |
637 | } | |
638 | ||
52af9545 BP |
639 | static struct usb_serial_driver ssu100_device = { |
640 | .driver = { | |
641 | .owner = THIS_MODULE, | |
642 | .name = "ssu100", | |
643 | }, | |
644 | .description = DRIVER_DESC, | |
645 | .id_table = id_table, | |
52af9545 | 646 | .num_ports = 1, |
52af9545 BP |
647 | .open = ssu100_open, |
648 | .close = ssu100_close, | |
649 | .attach = ssu100_attach, | |
650 | .release = ssu100_release, | |
651 | .dtr_rts = ssu100_dtr_rts, | |
652 | .process_read_urb = ssu100_process_read_urb, | |
653 | .tiocmget = ssu100_tiocmget, | |
654 | .tiocmset = ssu100_tiocmset, | |
0bca1b91 | 655 | .get_icount = ssu100_get_icount, |
52af9545 BP |
656 | .ioctl = ssu100_ioctl, |
657 | .set_termios = ssu100_set_termios, | |
85dee135 | 658 | .disconnect = usb_serial_generic_disconnect, |
52af9545 BP |
659 | }; |
660 | ||
d860322f AS |
661 | static struct usb_serial_driver * const serial_drivers[] = { |
662 | &ssu100_device, NULL | |
663 | }; | |
664 | ||
68e24113 | 665 | module_usb_serial_driver(serial_drivers, id_table); |
52af9545 BP |
666 | |
667 | MODULE_DESCRIPTION(DRIVER_DESC); | |
668 | MODULE_LICENSE("GPL"); |