Commit | Line | Data |
---|---|---|
5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
52af9545 BP |
2 | /* |
3 | * usb-serial driver for Quatech SSU-100 | |
4 | * | |
5 | * based on ftdi_sio.c and the original serqt_usb.c from Quatech | |
6 | * | |
7 | */ | |
8 | ||
9 | #include <linux/errno.h> | |
52af9545 BP |
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 | #define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver" |
50 | ||
51 | #define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */ | |
52 | #define QUATECH_SSU100 0xC020 /* SSU100 */ | |
53 | ||
54 | static const struct usb_device_id id_table[] = { | |
55 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)}, | |
56 | {} /* Terminating entry */ | |
57 | }; | |
52af9545 BP |
58 | MODULE_DEVICE_TABLE(usb, id_table); |
59 | ||
52af9545 | 60 | struct ssu100_port_private { |
17523058 | 61 | spinlock_t status_lock; |
52af9545 BP |
62 | u8 shadowLSR; |
63 | u8 shadowMSR; | |
52af9545 BP |
64 | }; |
65 | ||
52af9545 BP |
66 | static inline int ssu100_control_msg(struct usb_device *dev, |
67 | u8 request, u16 data, u16 index) | |
68 | { | |
69 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
70 | request, 0x40, data, index, | |
71 | NULL, 0, 300); | |
72 | } | |
73 | ||
74 | static inline int ssu100_setdevice(struct usb_device *dev, u8 *data) | |
75 | { | |
76 | u16 x = ((u16)(data[1] << 8) | (u16)(data[0])); | |
77 | ||
78 | return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0); | |
79 | } | |
80 | ||
81 | ||
82 | static inline int ssu100_getdevice(struct usb_device *dev, u8 *data) | |
83 | { | |
1eac5c24 JH |
84 | int ret; |
85 | ||
86 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
87 | QT_SET_GET_DEVICE, 0xc0, 0, 0, | |
88 | data, 3, 300); | |
89 | if (ret < 3) { | |
90 | if (ret >= 0) | |
91 | ret = -EIO; | |
92 | } | |
93 | ||
94 | return ret; | |
52af9545 BP |
95 | } |
96 | ||
97 | static inline int ssu100_getregister(struct usb_device *dev, | |
98 | unsigned short uart, | |
99 | unsigned short reg, | |
100 | u8 *data) | |
101 | { | |
1eac5c24 JH |
102 | int ret; |
103 | ||
104 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
105 | QT_SET_GET_REGISTER, 0xc0, reg, | |
106 | uart, data, sizeof(*data), 300); | |
107 | if (ret < sizeof(*data)) { | |
108 | if (ret >= 0) | |
109 | ret = -EIO; | |
110 | } | |
52af9545 | 111 | |
1eac5c24 | 112 | return ret; |
52af9545 BP |
113 | } |
114 | ||
115 | ||
116 | static inline int ssu100_setregister(struct usb_device *dev, | |
117 | unsigned short uart, | |
556f1a0e | 118 | unsigned short reg, |
52af9545 BP |
119 | u16 data) |
120 | { | |
556f1a0e | 121 | u16 value = (data << 8) | reg; |
52af9545 BP |
122 | |
123 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), | |
124 | QT_SET_GET_REGISTER, 0x40, value, uart, | |
125 | NULL, 0, 300); | |
126 | ||
127 | } | |
128 | ||
129 | #define set_mctrl(dev, set) update_mctrl((dev), (set), 0) | |
130 | #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear)) | |
131 | ||
132 | /* these do not deal with device that have more than 1 port */ | |
133 | static inline int update_mctrl(struct usb_device *dev, unsigned int set, | |
134 | unsigned int clear) | |
135 | { | |
136 | unsigned urb_value; | |
137 | int result; | |
138 | ||
139 | if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { | |
4f0c6412 | 140 | dev_dbg(&dev->dev, "%s - DTR|RTS not being set|cleared\n", __func__); |
52af9545 BP |
141 | return 0; /* no change */ |
142 | } | |
143 | ||
144 | clear &= ~set; /* 'set' takes precedence over 'clear' */ | |
145 | urb_value = 0; | |
146 | if (set & TIOCM_DTR) | |
79f203a2 | 147 | urb_value |= UART_MCR_DTR; |
52af9545 | 148 | if (set & TIOCM_RTS) |
79f203a2 | 149 | urb_value |= UART_MCR_RTS; |
52af9545 | 150 | |
556f1a0e | 151 | result = ssu100_setregister(dev, 0, UART_MCR, urb_value); |
52af9545 | 152 | if (result < 0) |
4f0c6412 | 153 | dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__); |
52af9545 BP |
154 | |
155 | return result; | |
156 | } | |
157 | ||
158 | static int ssu100_initdevice(struct usb_device *dev) | |
159 | { | |
160 | u8 *data; | |
161 | int result = 0; | |
162 | ||
52af9545 BP |
163 | data = kzalloc(3, GFP_KERNEL); |
164 | if (!data) | |
165 | return -ENOMEM; | |
166 | ||
167 | result = ssu100_getdevice(dev, data); | |
168 | if (result < 0) { | |
4f0c6412 | 169 | dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result); |
52af9545 BP |
170 | goto out; |
171 | } | |
172 | ||
173 | data[1] &= ~FULLPWRBIT; | |
174 | ||
175 | result = ssu100_setdevice(dev, data); | |
176 | if (result < 0) { | |
4f0c6412 | 177 | dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result); |
52af9545 BP |
178 | goto out; |
179 | } | |
180 | ||
181 | result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0); | |
182 | if (result < 0) { | |
4f0c6412 | 183 | dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result); |
52af9545 BP |
184 | goto out; |
185 | } | |
186 | ||
187 | result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0); | |
188 | if (result < 0) { | |
4f0c6412 | 189 | dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result); |
52af9545 BP |
190 | goto out; |
191 | } | |
192 | ||
193 | result = ssu100_getdevice(dev, data); | |
194 | if (result < 0) { | |
4f0c6412 | 195 | dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result); |
52af9545 BP |
196 | goto out; |
197 | } | |
198 | ||
199 | data[0] &= ~(RR_BITS | DUPMODE_BITS); | |
200 | data[0] |= CLKS_X4; | |
201 | data[1] &= ~(LOOPMODE_BITS); | |
202 | data[1] |= RS232_MODE; | |
203 | ||
204 | result = ssu100_setdevice(dev, data); | |
205 | if (result < 0) { | |
4f0c6412 | 206 | dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result); |
52af9545 BP |
207 | goto out; |
208 | } | |
209 | ||
210 | out: kfree(data); | |
211 | return result; | |
212 | ||
213 | } | |
214 | ||
215 | ||
216 | static void ssu100_set_termios(struct tty_struct *tty, | |
217 | struct usb_serial_port *port, | |
218 | struct ktermios *old_termios) | |
219 | { | |
220 | struct usb_device *dev = port->serial->dev; | |
adc8d746 | 221 | struct ktermios *termios = &tty->termios; |
52af9545 BP |
222 | u16 baud, divisor, remainder; |
223 | unsigned int cflag = termios->c_cflag; | |
224 | u16 urb_value = 0; /* will hold the new flags */ | |
225 | int result; | |
226 | ||
52af9545 BP |
227 | if (cflag & PARENB) { |
228 | if (cflag & PARODD) | |
79f203a2 | 229 | urb_value |= UART_LCR_PARITY; |
52af9545 BP |
230 | else |
231 | urb_value |= SERIAL_EVEN_PARITY; | |
232 | } | |
233 | ||
234 | switch (cflag & CSIZE) { | |
235 | case CS5: | |
79f203a2 | 236 | urb_value |= UART_LCR_WLEN5; |
52af9545 BP |
237 | break; |
238 | case CS6: | |
79f203a2 | 239 | urb_value |= UART_LCR_WLEN6; |
52af9545 BP |
240 | break; |
241 | case CS7: | |
79f203a2 | 242 | urb_value |= UART_LCR_WLEN7; |
52af9545 BP |
243 | break; |
244 | default: | |
245 | case CS8: | |
79f203a2 | 246 | urb_value |= UART_LCR_WLEN8; |
52af9545 BP |
247 | break; |
248 | } | |
249 | ||
250 | baud = tty_get_baud_rate(tty); | |
251 | if (!baud) | |
252 | baud = 9600; | |
253 | ||
4f0c6412 | 254 | dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud); |
52af9545 BP |
255 | |
256 | ||
257 | divisor = MAX_BAUD_RATE / baud; | |
258 | remainder = MAX_BAUD_RATE % baud; | |
259 | if (((remainder * 2) >= baud) && (baud != 110)) | |
260 | divisor++; | |
261 | ||
262 | urb_value = urb_value << 8; | |
263 | ||
264 | result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value); | |
265 | if (result < 0) | |
4f0c6412 | 266 | dev_dbg(&port->dev, "%s - set uart failed\n", __func__); |
52af9545 BP |
267 | |
268 | if (cflag & CRTSCTS) | |
269 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
270 | SERIAL_CRTSCTS, 0); | |
271 | else | |
272 | result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK, | |
273 | 0, 0); | |
274 | if (result < 0) | |
4f0c6412 | 275 | dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__); |
52af9545 BP |
276 | |
277 | if (I_IXOFF(tty) || I_IXON(tty)) { | |
278 | u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty))); | |
279 | ||
280 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
281 | x, 0); | |
282 | } else | |
283 | result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK, | |
284 | 0, 0); | |
285 | ||
286 | if (result < 0) | |
4f0c6412 | 287 | dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__); |
52af9545 BP |
288 | |
289 | } | |
290 | ||
291 | ||
292 | static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port) | |
293 | { | |
294 | struct usb_device *dev = port->serial->dev; | |
295 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
296 | u8 *data; | |
297 | int result; | |
17523058 | 298 | unsigned long flags; |
52af9545 | 299 | |
52af9545 BP |
300 | data = kzalloc(2, GFP_KERNEL); |
301 | if (!data) | |
302 | return -ENOMEM; | |
303 | ||
304 | result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), | |
305 | QT_OPEN_CLOSE_CHANNEL, | |
306 | QT_TRANSFER_IN, 0x01, | |
307 | 0, data, 2, 300); | |
1eac5c24 | 308 | if (result < 2) { |
4f0c6412 | 309 | dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result); |
1eac5c24 JH |
310 | if (result >= 0) |
311 | result = -EIO; | |
52af9545 BP |
312 | kfree(data); |
313 | return result; | |
314 | } | |
315 | ||
17523058 | 316 | spin_lock_irqsave(&priv->status_lock, flags); |
f81c83db BP |
317 | priv->shadowLSR = data[0]; |
318 | priv->shadowMSR = data[1]; | |
17523058 | 319 | spin_unlock_irqrestore(&priv->status_lock, flags); |
52af9545 BP |
320 | |
321 | kfree(data); | |
322 | ||
323 | /* set to 9600 */ | |
324 | result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300); | |
325 | if (result < 0) | |
4f0c6412 | 326 | dev_dbg(&port->dev, "%s - set uart failed\n", __func__); |
52af9545 BP |
327 | |
328 | if (tty) | |
adc8d746 | 329 | ssu100_set_termios(tty, port, &tty->termios); |
52af9545 BP |
330 | |
331 | return usb_serial_generic_open(tty, port); | |
332 | } | |
333 | ||
52af9545 BP |
334 | static int get_serial_info(struct usb_serial_port *port, |
335 | struct serial_struct __user *retinfo) | |
336 | { | |
337 | struct serial_struct tmp; | |
338 | ||
52af9545 | 339 | memset(&tmp, 0, sizeof(tmp)); |
e5b1e206 | 340 | tmp.line = port->minor; |
52af9545 BP |
341 | tmp.port = 0; |
342 | tmp.irq = 0; | |
52af9545 BP |
343 | tmp.xmit_fifo_size = port->bulk_out_size; |
344 | tmp.baud_base = 9600; | |
345 | tmp.close_delay = 5*HZ; | |
346 | tmp.closing_wait = 30*HZ; | |
347 | ||
348 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
349 | return -EFAULT; | |
350 | return 0; | |
351 | } | |
352 | ||
00a0d0d6 | 353 | static int ssu100_ioctl(struct tty_struct *tty, |
52af9545 BP |
354 | unsigned int cmd, unsigned long arg) |
355 | { | |
356 | struct usb_serial_port *port = tty->driver_data; | |
52af9545 | 357 | |
52af9545 BP |
358 | switch (cmd) { |
359 | case TIOCGSERIAL: | |
360 | return get_serial_info(port, | |
361 | (struct serial_struct __user *) arg); | |
52af9545 BP |
362 | default: |
363 | break; | |
364 | } | |
365 | ||
52af9545 BP |
366 | return -ENOIOCTLCMD; |
367 | } | |
368 | ||
52af9545 | 369 | static int ssu100_attach(struct usb_serial *serial) |
638b9e15 JH |
370 | { |
371 | return ssu100_initdevice(serial->dev); | |
372 | } | |
373 | ||
374 | static int ssu100_port_probe(struct usb_serial_port *port) | |
52af9545 BP |
375 | { |
376 | struct ssu100_port_private *priv; | |
52af9545 | 377 | |
52af9545 | 378 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
638b9e15 | 379 | if (!priv) |
52af9545 | 380 | return -ENOMEM; |
52af9545 | 381 | |
17523058 | 382 | spin_lock_init(&priv->status_lock); |
638b9e15 | 383 | |
52af9545 | 384 | usb_set_serial_port_data(port, priv); |
52af9545 | 385 | |
638b9e15 JH |
386 | return 0; |
387 | } | |
388 | ||
389 | static int ssu100_port_remove(struct usb_serial_port *port) | |
390 | { | |
391 | struct ssu100_port_private *priv; | |
392 | ||
393 | priv = usb_get_serial_port_data(port); | |
394 | kfree(priv); | |
395 | ||
396 | return 0; | |
52af9545 BP |
397 | } |
398 | ||
60b33c13 | 399 | static int ssu100_tiocmget(struct tty_struct *tty) |
52af9545 BP |
400 | { |
401 | struct usb_serial_port *port = tty->driver_data; | |
402 | struct usb_device *dev = port->serial->dev; | |
403 | u8 *d; | |
404 | int r; | |
405 | ||
52af9545 BP |
406 | d = kzalloc(2, GFP_KERNEL); |
407 | if (!d) | |
408 | return -ENOMEM; | |
409 | ||
79f203a2 | 410 | r = ssu100_getregister(dev, 0, UART_MCR, d); |
52af9545 BP |
411 | if (r < 0) |
412 | goto mget_out; | |
413 | ||
79f203a2 | 414 | r = ssu100_getregister(dev, 0, UART_MSR, d+1); |
52af9545 BP |
415 | if (r < 0) |
416 | goto mget_out; | |
417 | ||
79f203a2 BP |
418 | r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) | |
419 | (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) | | |
420 | (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) | | |
421 | (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) | | |
422 | (d[1] & UART_MSR_RI ? TIOCM_RI : 0) | | |
423 | (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0); | |
52af9545 BP |
424 | |
425 | mget_out: | |
426 | kfree(d); | |
427 | return r; | |
428 | } | |
429 | ||
20b9d177 | 430 | static int ssu100_tiocmset(struct tty_struct *tty, |
52af9545 BP |
431 | unsigned int set, unsigned int clear) |
432 | { | |
433 | struct usb_serial_port *port = tty->driver_data; | |
434 | struct usb_device *dev = port->serial->dev; | |
435 | ||
52af9545 BP |
436 | return update_mctrl(dev, set, clear); |
437 | } | |
438 | ||
439 | static void ssu100_dtr_rts(struct usb_serial_port *port, int on) | |
440 | { | |
441 | struct usb_device *dev = port->serial->dev; | |
442 | ||
b2ca6990 JH |
443 | /* Disable flow control */ |
444 | if (!on) { | |
445 | if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0) | |
52af9545 | 446 | dev_err(&port->dev, "error from flowcontrol urb\n"); |
52af9545 | 447 | } |
b2ca6990 JH |
448 | /* drop RTS and DTR */ |
449 | if (on) | |
450 | set_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
451 | else | |
452 | clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS); | |
52af9545 BP |
453 | } |
454 | ||
f81c83db BP |
455 | static void ssu100_update_msr(struct usb_serial_port *port, u8 msr) |
456 | { | |
457 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
458 | unsigned long flags; | |
459 | ||
460 | spin_lock_irqsave(&priv->status_lock, flags); | |
461 | priv->shadowMSR = msr; | |
462 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
463 | ||
464 | if (msr & UART_MSR_ANY_DELTA) { | |
465 | /* update input line counters */ | |
466 | if (msr & UART_MSR_DCTS) | |
31ecdb6b | 467 | port->icount.cts++; |
f81c83db | 468 | if (msr & UART_MSR_DDSR) |
31ecdb6b | 469 | port->icount.dsr++; |
f81c83db | 470 | if (msr & UART_MSR_DDCD) |
31ecdb6b | 471 | port->icount.dcd++; |
f81c83db | 472 | if (msr & UART_MSR_TERI) |
31ecdb6b | 473 | port->icount.rng++; |
c24c838e | 474 | wake_up_interruptible(&port->port.delta_msr_wait); |
f81c83db BP |
475 | } |
476 | } | |
477 | ||
6b8f1ca5 BP |
478 | static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr, |
479 | char *tty_flag) | |
f81c83db BP |
480 | { |
481 | struct ssu100_port_private *priv = usb_get_serial_port_data(port); | |
482 | unsigned long flags; | |
483 | ||
484 | spin_lock_irqsave(&priv->status_lock, flags); | |
485 | priv->shadowLSR = lsr; | |
486 | spin_unlock_irqrestore(&priv->status_lock, flags); | |
487 | ||
6b8f1ca5 | 488 | *tty_flag = TTY_NORMAL; |
f81c83db | 489 | if (lsr & UART_LSR_BRK_ERROR_BITS) { |
6b8f1ca5 BP |
490 | /* we always want to update icount, but we only want to |
491 | * update tty_flag for one case */ | |
492 | if (lsr & UART_LSR_BI) { | |
31ecdb6b | 493 | port->icount.brk++; |
6b8f1ca5 BP |
494 | *tty_flag = TTY_BREAK; |
495 | usb_serial_handle_break(port); | |
496 | } | |
497 | if (lsr & UART_LSR_PE) { | |
31ecdb6b | 498 | port->icount.parity++; |
6b8f1ca5 BP |
499 | if (*tty_flag == TTY_NORMAL) |
500 | *tty_flag = TTY_PARITY; | |
501 | } | |
502 | if (lsr & UART_LSR_FE) { | |
31ecdb6b | 503 | port->icount.frame++; |
6b8f1ca5 BP |
504 | if (*tty_flag == TTY_NORMAL) |
505 | *tty_flag = TTY_FRAME; | |
506 | } | |
75bcbf29 | 507 | if (lsr & UART_LSR_OE) { |
31ecdb6b | 508 | port->icount.overrun++; |
75bcbf29 | 509 | tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); |
6b8f1ca5 | 510 | } |
f81c83db | 511 | } |
6b8f1ca5 | 512 | |
f81c83db BP |
513 | } |
514 | ||
2e124b4a | 515 | static void ssu100_process_read_urb(struct urb *urb) |
52af9545 | 516 | { |
f7043ecb BP |
517 | struct usb_serial_port *port = urb->context; |
518 | char *packet = (char *)urb->transfer_buffer; | |
6b8f1ca5 | 519 | char flag = TTY_NORMAL; |
f7043ecb BP |
520 | u32 len = urb->actual_length; |
521 | int i; | |
52af9545 BP |
522 | char *ch; |
523 | ||
9b2cef31 BP |
524 | if ((len >= 4) && |
525 | (packet[0] == 0x1b) && (packet[1] == 0x1b) && | |
52af9545 | 526 | ((packet[2] == 0x00) || (packet[2] == 0x01))) { |
75bcbf29 | 527 | if (packet[2] == 0x00) |
6b8f1ca5 | 528 | ssu100_update_lsr(port, packet[3], &flag); |
f81c83db BP |
529 | if (packet[2] == 0x01) |
530 | ssu100_update_msr(port, packet[3]); | |
52af9545 BP |
531 | |
532 | len -= 4; | |
533 | ch = packet + 4; | |
534 | } else | |
535 | ch = packet; | |
536 | ||
537 | if (!len) | |
2e124b4a | 538 | return; /* status only */ |
52af9545 BP |
539 | |
540 | if (port->port.console && port->sysrq) { | |
541 | for (i = 0; i < len; i++, ch++) { | |
6ee9f4b4 | 542 | if (!usb_serial_handle_sysrq_char(port, *ch)) |
92a19f9c | 543 | tty_insert_flip_char(&port->port, *ch, flag); |
52af9545 BP |
544 | } |
545 | } else | |
2f693357 | 546 | tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len); |
52af9545 | 547 | |
2e124b4a | 548 | tty_flip_buffer_push(&port->port); |
52af9545 BP |
549 | } |
550 | ||
52af9545 BP |
551 | static struct usb_serial_driver ssu100_device = { |
552 | .driver = { | |
553 | .owner = THIS_MODULE, | |
554 | .name = "ssu100", | |
555 | }, | |
556 | .description = DRIVER_DESC, | |
557 | .id_table = id_table, | |
52af9545 | 558 | .num_ports = 1, |
52af9545 | 559 | .open = ssu100_open, |
52af9545 | 560 | .attach = ssu100_attach, |
638b9e15 JH |
561 | .port_probe = ssu100_port_probe, |
562 | .port_remove = ssu100_port_remove, | |
52af9545 BP |
563 | .dtr_rts = ssu100_dtr_rts, |
564 | .process_read_urb = ssu100_process_read_urb, | |
565 | .tiocmget = ssu100_tiocmget, | |
566 | .tiocmset = ssu100_tiocmset, | |
c24c838e | 567 | .tiocmiwait = usb_serial_generic_tiocmiwait, |
31ecdb6b | 568 | .get_icount = usb_serial_generic_get_icount, |
52af9545 BP |
569 | .ioctl = ssu100_ioctl, |
570 | .set_termios = ssu100_set_termios, | |
571 | }; | |
572 | ||
d860322f AS |
573 | static struct usb_serial_driver * const serial_drivers[] = { |
574 | &ssu100_device, NULL | |
575 | }; | |
576 | ||
68e24113 | 577 | module_usb_serial_driver(serial_drivers, id_table); |
52af9545 BP |
578 | |
579 | MODULE_DESCRIPTION(DRIVER_DESC); | |
580 | MODULE_LICENSE("GPL"); |