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[deliverable/linux.git] / drivers / usb / serial / mos7840.c
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/tty.h>
30 #include <linux/tty_driver.h>
31 #include <linux/tty_flip.h>
32 #include <linux/module.h>
33 #include <linux/serial.h>
34 #include <linux/usb.h>
35 #include <linux/usb/serial.h>
36 #include <linux/uaccess.h>
37
38 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
39
40 /*
41 * 16C50 UART register defines
42 */
43
44 #define LCR_BITS_5 0x00 /* 5 bits/char */
45 #define LCR_BITS_6 0x01 /* 6 bits/char */
46 #define LCR_BITS_7 0x02 /* 7 bits/char */
47 #define LCR_BITS_8 0x03 /* 8 bits/char */
48 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
49
50 #define LCR_STOP_1 0x00 /* 1 stop bit */
51 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
52 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
53 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
54
55 #define LCR_PAR_NONE 0x00 /* No parity */
56 #define LCR_PAR_ODD 0x08 /* Odd parity */
57 #define LCR_PAR_EVEN 0x18 /* Even parity */
58 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
59 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
60 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
61
62 #define LCR_SET_BREAK 0x40 /* Set Break condition */
63 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
64
65 #define MCR_DTR 0x01 /* Assert DTR */
66 #define MCR_RTS 0x02 /* Assert RTS */
67 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
68 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
69 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
70 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
71
72 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
73 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
74 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
75 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
76
77 /*
78 * Defines used for sending commands to port
79 */
80
81 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
82
83 #define MOS_PORT1 0x0200
84 #define MOS_PORT2 0x0300
85 #define MOS_VENREG 0x0000
86 #define MOS_MAX_PORT 0x02
87 #define MOS_WRITE 0x0E
88 #define MOS_READ 0x0D
89
90 /* Requests */
91 #define MCS_RD_RTYPE 0xC0
92 #define MCS_WR_RTYPE 0x40
93 #define MCS_RDREQ 0x0D
94 #define MCS_WRREQ 0x0E
95 #define MCS_CTRL_TIMEOUT 500
96 #define VENDOR_READ_LENGTH (0x01)
97
98 #define MAX_NAME_LEN 64
99
100 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
101 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
102
103 /* For higher baud Rates use TIOCEXBAUD */
104 #define TIOCEXBAUD 0x5462
105
106 /* vendor id and device id defines */
107
108 /* The native mos7840/7820 component */
109 #define USB_VENDOR_ID_MOSCHIP 0x9710
110 #define MOSCHIP_DEVICE_ID_7840 0x7840
111 #define MOSCHIP_DEVICE_ID_7820 0x7820
112 #define MOSCHIP_DEVICE_ID_7810 0x7810
113 /* The native component can have its vendor/device id's overridden
114 * in vendor-specific implementations. Such devices can be handled
115 * by making a change here, in id_table.
116 */
117 #define USB_VENDOR_ID_BANDB 0x0856
118 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
119 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
120 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
121 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
122 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
123 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
124 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
125 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
126 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
127 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
128 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
129 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
130 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
131
132 /* This driver also supports
133 * ATEN UC2324 device using Moschip MCS7840
134 * ATEN UC2322 device using Moschip MCS7820
135 */
136 #define USB_VENDOR_ID_ATENINTL 0x0557
137 #define ATENINTL_DEVICE_ID_UC2324 0x2011
138 #define ATENINTL_DEVICE_ID_UC2322 0x7820
139
140 /* Interrupt Routine Defines */
141
142 #define SERIAL_IIR_RLS 0x06
143 #define SERIAL_IIR_MS 0x00
144
145 /*
146 * Emulation of the bit mask on the LINE STATUS REGISTER.
147 */
148 #define SERIAL_LSR_DR 0x0001
149 #define SERIAL_LSR_OE 0x0002
150 #define SERIAL_LSR_PE 0x0004
151 #define SERIAL_LSR_FE 0x0008
152 #define SERIAL_LSR_BI 0x0010
153
154 #define MOS_MSR_DELTA_CTS 0x10
155 #define MOS_MSR_DELTA_DSR 0x20
156 #define MOS_MSR_DELTA_RI 0x40
157 #define MOS_MSR_DELTA_CD 0x80
158
159 /* Serial Port register Address */
160 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
161 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
162 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
163 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
164 #define LINE_STATUS_REGISTER ((__u16)(0x05))
165 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
166 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
167 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
168 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
169
170 #define CLK_MULTI_REGISTER ((__u16)(0x02))
171 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
172 #define GPIO_REGISTER ((__u16)(0x07))
173
174 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
175
176 /*
177 * URB POOL related defines
178 */
179 #define NUM_URBS 16 /* URB Count */
180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181
182 /* LED on/off milliseconds*/
183 #define LED_ON_MS 500
184 #define LED_OFF_MS 500
185
186 enum mos7840_flag {
187 MOS7840_FLAG_CTRL_BUSY,
188 MOS7840_FLAG_LED_BUSY,
189 };
190
191 static const struct usb_device_id id_table[] = {
192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
210 {} /* terminating entry */
211 };
212 MODULE_DEVICE_TABLE(usb, id_table);
213
214 /* This structure holds all of the local port information */
215
216 struct moschip_port {
217 int port_num; /*Actual port number in the device(1,2,etc) */
218 struct urb *write_urb; /* write URB for this port */
219 struct urb *read_urb; /* read URB for this port */
220 __u8 shadowLCR; /* last LCR value received */
221 __u8 shadowMCR; /* last MCR value received */
222 char open;
223 char open_ports;
224 struct usb_serial_port *port; /* loop back to the owner of this object */
225
226 /* Offsets */
227 __u8 SpRegOffset;
228 __u8 ControlRegOffset;
229 __u8 DcrRegOffset;
230 /* for processing control URBS in interrupt context */
231 struct urb *control_urb;
232 struct usb_ctrlrequest *dr;
233 char *ctrl_buf;
234 int MsrLsr;
235
236 spinlock_t pool_lock;
237 struct urb *write_urb_pool[NUM_URBS];
238 char busy[NUM_URBS];
239 bool read_urb_busy;
240
241 /* For device(s) with LED indicator */
242 bool has_led;
243 struct timer_list led_timer1; /* Timer for LED on */
244 struct timer_list led_timer2; /* Timer for LED off */
245 struct urb *led_urb;
246 struct usb_ctrlrequest *led_dr;
247
248 unsigned long flags;
249 };
250
251 /*
252 * mos7840_set_reg_sync
253 * To set the Control register by calling usb_fill_control_urb function
254 * by passing usb_sndctrlpipe function as parameter.
255 */
256
257 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
258 __u16 val)
259 {
260 struct usb_device *dev = port->serial->dev;
261 val = val & 0x00ff;
262 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
263
264 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
265 MCS_WR_RTYPE, val, reg, NULL, 0,
266 MOS_WDR_TIMEOUT);
267 }
268
269 /*
270 * mos7840_get_reg_sync
271 * To set the Uart register by calling usb_fill_control_urb function by
272 * passing usb_rcvctrlpipe function as parameter.
273 */
274
275 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
276 __u16 *val)
277 {
278 struct usb_device *dev = port->serial->dev;
279 int ret = 0;
280 u8 *buf;
281
282 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
283 if (!buf)
284 return -ENOMEM;
285
286 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
287 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
288 MOS_WDR_TIMEOUT);
289 *val = buf[0];
290 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
291
292 kfree(buf);
293 return ret;
294 }
295
296 /*
297 * mos7840_set_uart_reg
298 * To set the Uart register by calling usb_fill_control_urb function by
299 * passing usb_sndctrlpipe function as parameter.
300 */
301
302 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
303 __u16 val)
304 {
305
306 struct usb_device *dev = port->serial->dev;
307 val = val & 0x00ff;
308 /* For the UART control registers, the application number need
309 to be Or'ed */
310 if (port->serial->num_ports == 4) {
311 val |= ((__u16)port->port_number + 1) << 8;
312 } else {
313 if (port->port_number == 0) {
314 val |= ((__u16)port->port_number + 1) << 8;
315 } else {
316 val |= ((__u16)port->port_number + 2) << 8;
317 }
318 }
319 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
320 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
321 MCS_WR_RTYPE, val, reg, NULL, 0,
322 MOS_WDR_TIMEOUT);
323
324 }
325
326 /*
327 * mos7840_get_uart_reg
328 * To set the Control register by calling usb_fill_control_urb function
329 * by passing usb_rcvctrlpipe function as parameter.
330 */
331 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
332 __u16 *val)
333 {
334 struct usb_device *dev = port->serial->dev;
335 int ret = 0;
336 __u16 Wval;
337 u8 *buf;
338
339 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
340 if (!buf)
341 return -ENOMEM;
342
343 /* Wval is same as application number */
344 if (port->serial->num_ports == 4) {
345 Wval = ((__u16)port->port_number + 1) << 8;
346 } else {
347 if (port->port_number == 0) {
348 Wval = ((__u16)port->port_number + 1) << 8;
349 } else {
350 Wval = ((__u16)port->port_number + 2) << 8;
351 }
352 }
353 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
354 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
355 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
356 MOS_WDR_TIMEOUT);
357 *val = buf[0];
358
359 kfree(buf);
360 return ret;
361 }
362
363 static void mos7840_dump_serial_port(struct usb_serial_port *port,
364 struct moschip_port *mos7840_port)
365 {
366
367 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
368 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
369 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
370
371 }
372
373 /************************************************************************/
374 /************************************************************************/
375 /* I N T E R F A C E F U N C T I O N S */
376 /* I N T E R F A C E F U N C T I O N S */
377 /************************************************************************/
378 /************************************************************************/
379
380 static inline void mos7840_set_port_private(struct usb_serial_port *port,
381 struct moschip_port *data)
382 {
383 usb_set_serial_port_data(port, (void *)data);
384 }
385
386 static inline struct moschip_port *mos7840_get_port_private(struct
387 usb_serial_port
388 *port)
389 {
390 return (struct moschip_port *)usb_get_serial_port_data(port);
391 }
392
393 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
394 {
395 struct moschip_port *mos7840_port;
396 struct async_icount *icount;
397 mos7840_port = port;
398 if (new_msr &
399 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
400 MOS_MSR_DELTA_CD)) {
401 icount = &mos7840_port->port->icount;
402
403 /* update input line counters */
404 if (new_msr & MOS_MSR_DELTA_CTS)
405 icount->cts++;
406 if (new_msr & MOS_MSR_DELTA_DSR)
407 icount->dsr++;
408 if (new_msr & MOS_MSR_DELTA_CD)
409 icount->dcd++;
410 if (new_msr & MOS_MSR_DELTA_RI)
411 icount->rng++;
412
413 wake_up_interruptible(&port->port->port.delta_msr_wait);
414 }
415 }
416
417 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
418 {
419 struct async_icount *icount;
420
421 if (new_lsr & SERIAL_LSR_BI) {
422 /*
423 * Parity and Framing errors only count if they
424 * occur exclusive of a break being
425 * received.
426 */
427 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
428 }
429
430 /* update input line counters */
431 icount = &port->port->icount;
432 if (new_lsr & SERIAL_LSR_BI)
433 icount->brk++;
434 if (new_lsr & SERIAL_LSR_OE)
435 icount->overrun++;
436 if (new_lsr & SERIAL_LSR_PE)
437 icount->parity++;
438 if (new_lsr & SERIAL_LSR_FE)
439 icount->frame++;
440 }
441
442 /************************************************************************/
443 /************************************************************************/
444 /* U S B C A L L B A C K F U N C T I O N S */
445 /* U S B C A L L B A C K F U N C T I O N S */
446 /************************************************************************/
447 /************************************************************************/
448
449 static void mos7840_control_callback(struct urb *urb)
450 {
451 unsigned char *data;
452 struct moschip_port *mos7840_port;
453 struct device *dev = &urb->dev->dev;
454 __u8 regval = 0x0;
455 int status = urb->status;
456
457 mos7840_port = urb->context;
458
459 switch (status) {
460 case 0:
461 /* success */
462 break;
463 case -ECONNRESET:
464 case -ENOENT:
465 case -ESHUTDOWN:
466 /* this urb is terminated, clean up */
467 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
468 goto out;
469 default:
470 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
471 goto out;
472 }
473
474 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
475 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
476 mos7840_port->MsrLsr, mos7840_port->port_num);
477 data = urb->transfer_buffer;
478 regval = (__u8) data[0];
479 dev_dbg(dev, "%s data is %x\n", __func__, regval);
480 if (mos7840_port->MsrLsr == 0)
481 mos7840_handle_new_msr(mos7840_port, regval);
482 else if (mos7840_port->MsrLsr == 1)
483 mos7840_handle_new_lsr(mos7840_port, regval);
484 out:
485 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
486 }
487
488 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
489 __u16 *val)
490 {
491 struct usb_device *dev = mcs->port->serial->dev;
492 struct usb_ctrlrequest *dr = mcs->dr;
493 unsigned char *buffer = mcs->ctrl_buf;
494 int ret;
495
496 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
497 return -EBUSY;
498
499 dr->bRequestType = MCS_RD_RTYPE;
500 dr->bRequest = MCS_RDREQ;
501 dr->wValue = cpu_to_le16(Wval); /* 0 */
502 dr->wIndex = cpu_to_le16(reg);
503 dr->wLength = cpu_to_le16(2);
504
505 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
506 (unsigned char *)dr, buffer, 2,
507 mos7840_control_callback, mcs);
508 mcs->control_urb->transfer_buffer_length = 2;
509 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
510 if (ret)
511 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
512
513 return ret;
514 }
515
516 static void mos7840_set_led_callback(struct urb *urb)
517 {
518 switch (urb->status) {
519 case 0:
520 /* Success */
521 break;
522 case -ECONNRESET:
523 case -ENOENT:
524 case -ESHUTDOWN:
525 /* This urb is terminated, clean up */
526 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
527 __func__, urb->status);
528 break;
529 default:
530 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
531 __func__, urb->status);
532 }
533 }
534
535 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
536 __u16 reg)
537 {
538 struct usb_device *dev = mcs->port->serial->dev;
539 struct usb_ctrlrequest *dr = mcs->led_dr;
540
541 dr->bRequestType = MCS_WR_RTYPE;
542 dr->bRequest = MCS_WRREQ;
543 dr->wValue = cpu_to_le16(wval);
544 dr->wIndex = cpu_to_le16(reg);
545 dr->wLength = cpu_to_le16(0);
546
547 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
548 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
549
550 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
551 }
552
553 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
554 __u16 val)
555 {
556 struct usb_device *dev = port->serial->dev;
557
558 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
559 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
560 }
561
562 static void mos7840_led_off(unsigned long arg)
563 {
564 struct moschip_port *mcs = (struct moschip_port *) arg;
565
566 /* Turn off LED */
567 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
568 mod_timer(&mcs->led_timer2,
569 jiffies + msecs_to_jiffies(LED_OFF_MS));
570 }
571
572 static void mos7840_led_flag_off(unsigned long arg)
573 {
574 struct moschip_port *mcs = (struct moschip_port *) arg;
575
576 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
577 }
578
579 static void mos7840_led_activity(struct usb_serial_port *port)
580 {
581 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
582
583 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
584 return;
585
586 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
587 mod_timer(&mos7840_port->led_timer1,
588 jiffies + msecs_to_jiffies(LED_ON_MS));
589 }
590
591 /*****************************************************************************
592 * mos7840_interrupt_callback
593 * this is the callback function for when we have received data on the
594 * interrupt endpoint.
595 *****************************************************************************/
596
597 static void mos7840_interrupt_callback(struct urb *urb)
598 {
599 int result;
600 int length;
601 struct moschip_port *mos7840_port;
602 struct usb_serial *serial;
603 __u16 Data;
604 unsigned char *data;
605 __u8 sp[5], st;
606 int i, rv = 0;
607 __u16 wval, wreg = 0;
608 int status = urb->status;
609
610 switch (status) {
611 case 0:
612 /* success */
613 break;
614 case -ECONNRESET:
615 case -ENOENT:
616 case -ESHUTDOWN:
617 /* this urb is terminated, clean up */
618 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
619 __func__, status);
620 return;
621 default:
622 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
623 __func__, status);
624 goto exit;
625 }
626
627 length = urb->actual_length;
628 data = urb->transfer_buffer;
629
630 serial = urb->context;
631
632 /* Moschip get 5 bytes
633 * Byte 1 IIR Port 1 (port.number is 0)
634 * Byte 2 IIR Port 2 (port.number is 1)
635 * Byte 3 IIR Port 3 (port.number is 2)
636 * Byte 4 IIR Port 4 (port.number is 3)
637 * Byte 5 FIFO status for both */
638
639 if (length && length > 5) {
640 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
641 return;
642 }
643
644 sp[0] = (__u8) data[0];
645 sp[1] = (__u8) data[1];
646 sp[2] = (__u8) data[2];
647 sp[3] = (__u8) data[3];
648 st = (__u8) data[4];
649
650 for (i = 0; i < serial->num_ports; i++) {
651 mos7840_port = mos7840_get_port_private(serial->port[i]);
652 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
653 if (mos7840_port->open) {
654 if (sp[i] & 0x01) {
655 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
656 } else {
657 switch (sp[i] & 0x0f) {
658 case SERIAL_IIR_RLS:
659 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
660 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
661 mos7840_port->MsrLsr = 1;
662 wreg = LINE_STATUS_REGISTER;
663 break;
664 case SERIAL_IIR_MS:
665 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
666 mos7840_port->MsrLsr = 0;
667 wreg = MODEM_STATUS_REGISTER;
668 break;
669 }
670 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
671 }
672 }
673 }
674 if (!(rv < 0))
675 /* the completion handler for the control urb will resubmit */
676 return;
677 exit:
678 result = usb_submit_urb(urb, GFP_ATOMIC);
679 if (result) {
680 dev_err(&urb->dev->dev,
681 "%s - Error %d submitting interrupt urb\n",
682 __func__, result);
683 }
684 }
685
686 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
687 const char *function)
688 {
689 if (!port) {
690 pr_debug("%s - port == NULL\n", function);
691 return -1;
692 }
693 if (!port->serial) {
694 pr_debug("%s - port->serial == NULL\n", function);
695 return -1;
696 }
697
698 return 0;
699 }
700
701 /* Inline functions to check the sanity of a pointer that is passed to us */
702 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
703 const char *function)
704 {
705 if (!serial) {
706 pr_debug("%s - serial == NULL\n", function);
707 return -1;
708 }
709 if (!serial->type) {
710 pr_debug("%s - serial->type == NULL!\n", function);
711 return -1;
712 }
713
714 return 0;
715 }
716
717 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
718 const char *function)
719 {
720 /* if no port was specified, or it fails a paranoia check */
721 if (!port ||
722 mos7840_port_paranoia_check(port, function) ||
723 mos7840_serial_paranoia_check(port->serial, function)) {
724 /* then say that we don't have a valid usb_serial thing,
725 * which will end up genrating -ENODEV return values */
726 return NULL;
727 }
728
729 return port->serial;
730 }
731
732 /*****************************************************************************
733 * mos7840_bulk_in_callback
734 * this is the callback function for when we have received data on the
735 * bulk in endpoint.
736 *****************************************************************************/
737
738 static void mos7840_bulk_in_callback(struct urb *urb)
739 {
740 int retval;
741 unsigned char *data;
742 struct usb_serial *serial;
743 struct usb_serial_port *port;
744 struct moschip_port *mos7840_port;
745 int status = urb->status;
746
747 mos7840_port = urb->context;
748 if (!mos7840_port)
749 return;
750
751 if (status) {
752 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
753 mos7840_port->read_urb_busy = false;
754 return;
755 }
756
757 port = mos7840_port->port;
758 if (mos7840_port_paranoia_check(port, __func__)) {
759 mos7840_port->read_urb_busy = false;
760 return;
761 }
762
763 serial = mos7840_get_usb_serial(port, __func__);
764 if (!serial) {
765 mos7840_port->read_urb_busy = false;
766 return;
767 }
768
769 data = urb->transfer_buffer;
770 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
771
772 if (urb->actual_length) {
773 struct tty_port *tport = &mos7840_port->port->port;
774 tty_insert_flip_string(tport, data, urb->actual_length);
775 tty_flip_buffer_push(tport);
776 port->icount.rx += urb->actual_length;
777 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
778 }
779
780 if (!mos7840_port->read_urb) {
781 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
782 mos7840_port->read_urb_busy = false;
783 return;
784 }
785
786 if (mos7840_port->has_led)
787 mos7840_led_activity(port);
788
789 mos7840_port->read_urb_busy = true;
790 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
791
792 if (retval) {
793 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
794 mos7840_port->read_urb_busy = false;
795 }
796 }
797
798 /*****************************************************************************
799 * mos7840_bulk_out_data_callback
800 * this is the callback function for when we have finished sending
801 * serial data on the bulk out endpoint.
802 *****************************************************************************/
803
804 static void mos7840_bulk_out_data_callback(struct urb *urb)
805 {
806 struct moschip_port *mos7840_port;
807 struct usb_serial_port *port;
808 int status = urb->status;
809 int i;
810
811 mos7840_port = urb->context;
812 port = mos7840_port->port;
813 spin_lock(&mos7840_port->pool_lock);
814 for (i = 0; i < NUM_URBS; i++) {
815 if (urb == mos7840_port->write_urb_pool[i]) {
816 mos7840_port->busy[i] = 0;
817 break;
818 }
819 }
820 spin_unlock(&mos7840_port->pool_lock);
821
822 if (status) {
823 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
824 return;
825 }
826
827 if (mos7840_port_paranoia_check(port, __func__))
828 return;
829
830 if (mos7840_port->open)
831 tty_port_tty_wakeup(&port->port);
832
833 }
834
835 /************************************************************************/
836 /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */
837 /************************************************************************/
838
839 /*****************************************************************************
840 * mos7840_open
841 * this function is called by the tty driver when a port is opened
842 * If successful, we return 0
843 * Otherwise we return a negative error number.
844 *****************************************************************************/
845
846 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
847 {
848 int response;
849 int j;
850 struct usb_serial *serial;
851 struct urb *urb;
852 __u16 Data;
853 int status;
854 struct moschip_port *mos7840_port;
855 struct moschip_port *port0;
856
857 if (mos7840_port_paranoia_check(port, __func__))
858 return -ENODEV;
859
860 serial = port->serial;
861
862 if (mos7840_serial_paranoia_check(serial, __func__))
863 return -ENODEV;
864
865 mos7840_port = mos7840_get_port_private(port);
866 port0 = mos7840_get_port_private(serial->port[0]);
867
868 if (mos7840_port == NULL || port0 == NULL)
869 return -ENODEV;
870
871 usb_clear_halt(serial->dev, port->write_urb->pipe);
872 usb_clear_halt(serial->dev, port->read_urb->pipe);
873 port0->open_ports++;
874
875 /* Initialising the write urb pool */
876 for (j = 0; j < NUM_URBS; ++j) {
877 urb = usb_alloc_urb(0, GFP_KERNEL);
878 mos7840_port->write_urb_pool[j] = urb;
879
880 if (urb == NULL) {
881 dev_err(&port->dev, "No more urbs???\n");
882 continue;
883 }
884
885 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
886 GFP_KERNEL);
887 if (!urb->transfer_buffer) {
888 usb_free_urb(urb);
889 mos7840_port->write_urb_pool[j] = NULL;
890 dev_err(&port->dev,
891 "%s-out of memory for urb buffers.\n",
892 __func__);
893 continue;
894 }
895 }
896
897 /*****************************************************************************
898 * Initialize MCS7840 -- Write Init values to corresponding Registers
899 *
900 * Register Index
901 * 1 : IER
902 * 2 : FCR
903 * 3 : LCR
904 * 4 : MCR
905 *
906 * 0x08 : SP1/2 Control Reg
907 *****************************************************************************/
908
909 /* NEED to check the following Block */
910
911 Data = 0x0;
912 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
913 if (status < 0) {
914 dev_dbg(&port->dev, "Reading Spreg failed\n");
915 goto err;
916 }
917 Data |= 0x80;
918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
919 if (status < 0) {
920 dev_dbg(&port->dev, "writing Spreg failed\n");
921 goto err;
922 }
923
924 Data &= ~0x80;
925 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
926 if (status < 0) {
927 dev_dbg(&port->dev, "writing Spreg failed\n");
928 goto err;
929 }
930 /* End of block to be checked */
931
932 Data = 0x0;
933 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
934 &Data);
935 if (status < 0) {
936 dev_dbg(&port->dev, "Reading Controlreg failed\n");
937 goto err;
938 }
939 Data |= 0x08; /* Driver done bit */
940 Data |= 0x20; /* rx_disable */
941 status = mos7840_set_reg_sync(port,
942 mos7840_port->ControlRegOffset, Data);
943 if (status < 0) {
944 dev_dbg(&port->dev, "writing Controlreg failed\n");
945 goto err;
946 }
947 /* do register settings here */
948 /* Set all regs to the device default values. */
949 /***********************************
950 * First Disable all interrupts.
951 ***********************************/
952 Data = 0x00;
953 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
954 if (status < 0) {
955 dev_dbg(&port->dev, "disabling interrupts failed\n");
956 goto err;
957 }
958 /* Set FIFO_CONTROL_REGISTER to the default value */
959 Data = 0x00;
960 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
961 if (status < 0) {
962 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
963 goto err;
964 }
965
966 Data = 0xcf;
967 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
968 if (status < 0) {
969 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
970 goto err;
971 }
972
973 Data = 0x03;
974 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
975 mos7840_port->shadowLCR = Data;
976
977 Data = 0x0b;
978 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
979 mos7840_port->shadowMCR = Data;
980
981 Data = 0x00;
982 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
983 mos7840_port->shadowLCR = Data;
984
985 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
986 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
987
988 Data = 0x0c;
989 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
990
991 Data = 0x0;
992 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
993
994 Data = 0x00;
995 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
996
997 Data = Data & ~SERIAL_LCR_DLAB;
998 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
999 mos7840_port->shadowLCR = Data;
1000
1001 /* clearing Bulkin and Bulkout Fifo */
1002 Data = 0x0;
1003 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1004
1005 Data = Data | 0x0c;
1006 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1007
1008 Data = Data & ~0x0c;
1009 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1010 /* Finally enable all interrupts */
1011 Data = 0x0c;
1012 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1013
1014 /* clearing rx_disable */
1015 Data = 0x0;
1016 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1017 &Data);
1018 Data = Data & ~0x20;
1019 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1020 Data);
1021
1022 /* rx_negate */
1023 Data = 0x0;
1024 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1025 &Data);
1026 Data = Data | 0x10;
1027 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1028 Data);
1029
1030 /* Check to see if we've set up our endpoint info yet *
1031 * (can't set it up in mos7840_startup as the structures *
1032 * were not set up at that time.) */
1033 if (port0->open_ports == 1) {
1034 if (serial->port[0]->interrupt_in_buffer == NULL) {
1035 /* set up interrupt urb */
1036 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1037 serial->dev,
1038 usb_rcvintpipe(serial->dev,
1039 serial->port[0]->interrupt_in_endpointAddress),
1040 serial->port[0]->interrupt_in_buffer,
1041 serial->port[0]->interrupt_in_urb->
1042 transfer_buffer_length,
1043 mos7840_interrupt_callback,
1044 serial,
1045 serial->port[0]->interrupt_in_urb->interval);
1046
1047 /* start interrupt read for mos7840 *
1048 * will continue as long as mos7840 is connected */
1049
1050 response =
1051 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1052 GFP_KERNEL);
1053 if (response) {
1054 dev_err(&port->dev, "%s - Error %d submitting "
1055 "interrupt urb\n", __func__, response);
1056 }
1057
1058 }
1059
1060 }
1061
1062 /* see if we've set up our endpoint info yet *
1063 * (can't set it up in mos7840_startup as the *
1064 * structures were not set up at that time.) */
1065
1066 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
1067 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
1068 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1069 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1070 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1071 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1072 mos7840_port->read_urb = port->read_urb;
1073
1074 /* set up our bulk in urb */
1075 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1076 usb_fill_bulk_urb(mos7840_port->read_urb,
1077 serial->dev,
1078 usb_rcvbulkpipe(serial->dev,
1079 (port->bulk_in_endpointAddress) + 2),
1080 port->bulk_in_buffer,
1081 mos7840_port->read_urb->transfer_buffer_length,
1082 mos7840_bulk_in_callback, mos7840_port);
1083 } else {
1084 usb_fill_bulk_urb(mos7840_port->read_urb,
1085 serial->dev,
1086 usb_rcvbulkpipe(serial->dev,
1087 port->bulk_in_endpointAddress),
1088 port->bulk_in_buffer,
1089 mos7840_port->read_urb->transfer_buffer_length,
1090 mos7840_bulk_in_callback, mos7840_port);
1091 }
1092
1093 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1094 mos7840_port->read_urb_busy = true;
1095 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1096 if (response) {
1097 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1098 __func__, response);
1099 mos7840_port->read_urb_busy = false;
1100 }
1101
1102 /* initialize our port settings */
1103 /* Must set to enable ints! */
1104 mos7840_port->shadowMCR = MCR_MASTER_IE;
1105 /* send a open port command */
1106 mos7840_port->open = 1;
1107 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1108
1109 return 0;
1110 err:
1111 for (j = 0; j < NUM_URBS; ++j) {
1112 urb = mos7840_port->write_urb_pool[j];
1113 if (!urb)
1114 continue;
1115 kfree(urb->transfer_buffer);
1116 usb_free_urb(urb);
1117 }
1118 return status;
1119 }
1120
1121 /*****************************************************************************
1122 * mos7840_chars_in_buffer
1123 * this function is called by the tty driver when it wants to know how many
1124 * bytes of data we currently have outstanding in the port (data that has
1125 * been written, but hasn't made it out the port yet)
1126 * If successful, we return the number of bytes left to be written in the
1127 * system,
1128 * Otherwise we return zero.
1129 *****************************************************************************/
1130
1131 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1132 {
1133 struct usb_serial_port *port = tty->driver_data;
1134 int i;
1135 int chars = 0;
1136 unsigned long flags;
1137 struct moschip_port *mos7840_port;
1138
1139 if (mos7840_port_paranoia_check(port, __func__))
1140 return 0;
1141
1142 mos7840_port = mos7840_get_port_private(port);
1143 if (mos7840_port == NULL)
1144 return 0;
1145
1146 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1147 for (i = 0; i < NUM_URBS; ++i) {
1148 if (mos7840_port->busy[i]) {
1149 struct urb *urb = mos7840_port->write_urb_pool[i];
1150 chars += urb->transfer_buffer_length;
1151 }
1152 }
1153 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1154 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1155 return chars;
1156
1157 }
1158
1159 /*****************************************************************************
1160 * mos7840_close
1161 * this function is called by the tty driver when a port is closed
1162 *****************************************************************************/
1163
1164 static void mos7840_close(struct usb_serial_port *port)
1165 {
1166 struct usb_serial *serial;
1167 struct moschip_port *mos7840_port;
1168 struct moschip_port *port0;
1169 int j;
1170 __u16 Data;
1171
1172 if (mos7840_port_paranoia_check(port, __func__))
1173 return;
1174
1175 serial = mos7840_get_usb_serial(port, __func__);
1176 if (!serial)
1177 return;
1178
1179 mos7840_port = mos7840_get_port_private(port);
1180 port0 = mos7840_get_port_private(serial->port[0]);
1181
1182 if (mos7840_port == NULL || port0 == NULL)
1183 return;
1184
1185 for (j = 0; j < NUM_URBS; ++j)
1186 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1187
1188 /* Freeing Write URBs */
1189 for (j = 0; j < NUM_URBS; ++j) {
1190 if (mos7840_port->write_urb_pool[j]) {
1191 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1192 kfree(mos7840_port->write_urb_pool[j]->
1193 transfer_buffer);
1194
1195 usb_free_urb(mos7840_port->write_urb_pool[j]);
1196 }
1197 }
1198
1199 usb_kill_urb(mos7840_port->write_urb);
1200 usb_kill_urb(mos7840_port->read_urb);
1201 mos7840_port->read_urb_busy = false;
1202
1203 port0->open_ports--;
1204 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
1205 if (port0->open_ports == 0) {
1206 if (serial->port[0]->interrupt_in_urb) {
1207 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1208 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1209 }
1210 }
1211
1212 if (mos7840_port->write_urb) {
1213 /* if this urb had a transfer buffer already (old tx) free it */
1214 kfree(mos7840_port->write_urb->transfer_buffer);
1215 usb_free_urb(mos7840_port->write_urb);
1216 }
1217
1218 Data = 0x0;
1219 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1220
1221 Data = 0x00;
1222 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1223
1224 mos7840_port->open = 0;
1225 }
1226
1227 /*****************************************************************************
1228 * mos7840_break
1229 * this function sends a break to the port
1230 *****************************************************************************/
1231 static void mos7840_break(struct tty_struct *tty, int break_state)
1232 {
1233 struct usb_serial_port *port = tty->driver_data;
1234 unsigned char data;
1235 struct usb_serial *serial;
1236 struct moschip_port *mos7840_port;
1237
1238 if (mos7840_port_paranoia_check(port, __func__))
1239 return;
1240
1241 serial = mos7840_get_usb_serial(port, __func__);
1242 if (!serial)
1243 return;
1244
1245 mos7840_port = mos7840_get_port_private(port);
1246
1247 if (mos7840_port == NULL)
1248 return;
1249
1250 if (break_state == -1)
1251 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1252 else
1253 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1254
1255 /* FIXME: no locking on shadowLCR anywhere in driver */
1256 mos7840_port->shadowLCR = data;
1257 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1258 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1259 mos7840_port->shadowLCR);
1260 }
1261
1262 /*****************************************************************************
1263 * mos7840_write_room
1264 * this function is called by the tty driver when it wants to know how many
1265 * bytes of data we can accept for a specific port.
1266 * If successful, we return the amount of room that we have for this port
1267 * Otherwise we return a negative error number.
1268 *****************************************************************************/
1269
1270 static int mos7840_write_room(struct tty_struct *tty)
1271 {
1272 struct usb_serial_port *port = tty->driver_data;
1273 int i;
1274 int room = 0;
1275 unsigned long flags;
1276 struct moschip_port *mos7840_port;
1277
1278 if (mos7840_port_paranoia_check(port, __func__))
1279 return -1;
1280
1281 mos7840_port = mos7840_get_port_private(port);
1282 if (mos7840_port == NULL)
1283 return -1;
1284
1285 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1286 for (i = 0; i < NUM_URBS; ++i) {
1287 if (!mos7840_port->busy[i])
1288 room += URB_TRANSFER_BUFFER_SIZE;
1289 }
1290 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1291
1292 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1293 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1294 return room;
1295
1296 }
1297
1298 /*****************************************************************************
1299 * mos7840_write
1300 * this function is called by the tty driver when data should be written to
1301 * the port.
1302 * If successful, we return the number of bytes written, otherwise we
1303 * return a negative error number.
1304 *****************************************************************************/
1305
1306 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1307 const unsigned char *data, int count)
1308 {
1309 int status;
1310 int i;
1311 int bytes_sent = 0;
1312 int transfer_size;
1313 unsigned long flags;
1314
1315 struct moschip_port *mos7840_port;
1316 struct usb_serial *serial;
1317 struct urb *urb;
1318 /* __u16 Data; */
1319 const unsigned char *current_position = data;
1320 unsigned char *data1;
1321
1322 #ifdef NOTMOS7840
1323 Data = 0x00;
1324 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1325 mos7840_port->shadowLCR = Data;
1326 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1327 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1328
1329 /* Data = 0x03; */
1330 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1331 /* mos7840_port->shadowLCR=Data;//Need to add later */
1332
1333 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1334 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1335
1336 /* Data = 0x0c; */
1337 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1338 Data = 0x00;
1339 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1340 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1341
1342 Data = 0x0;
1343 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1344 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1345
1346 Data = Data & ~SERIAL_LCR_DLAB;
1347 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1348 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1349 #endif
1350
1351 if (mos7840_port_paranoia_check(port, __func__))
1352 return -1;
1353
1354 serial = port->serial;
1355 if (mos7840_serial_paranoia_check(serial, __func__))
1356 return -1;
1357
1358 mos7840_port = mos7840_get_port_private(port);
1359 if (mos7840_port == NULL)
1360 return -1;
1361
1362 /* try to find a free urb in the list */
1363 urb = NULL;
1364
1365 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1366 for (i = 0; i < NUM_URBS; ++i) {
1367 if (!mos7840_port->busy[i]) {
1368 mos7840_port->busy[i] = 1;
1369 urb = mos7840_port->write_urb_pool[i];
1370 dev_dbg(&port->dev, "URB:%d\n", i);
1371 break;
1372 }
1373 }
1374 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1375
1376 if (urb == NULL) {
1377 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1378 goto exit;
1379 }
1380
1381 if (urb->transfer_buffer == NULL) {
1382 urb->transfer_buffer =
1383 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1384
1385 if (urb->transfer_buffer == NULL) {
1386 dev_err_console(port, "%s no more kernel memory...\n",
1387 __func__);
1388 goto exit;
1389 }
1390 }
1391 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1392
1393 memcpy(urb->transfer_buffer, current_position, transfer_size);
1394
1395 /* fill urb with data and submit */
1396 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1397 usb_fill_bulk_urb(urb,
1398 serial->dev,
1399 usb_sndbulkpipe(serial->dev,
1400 (port->bulk_out_endpointAddress) + 2),
1401 urb->transfer_buffer,
1402 transfer_size,
1403 mos7840_bulk_out_data_callback, mos7840_port);
1404 } else {
1405 usb_fill_bulk_urb(urb,
1406 serial->dev,
1407 usb_sndbulkpipe(serial->dev,
1408 port->bulk_out_endpointAddress),
1409 urb->transfer_buffer,
1410 transfer_size,
1411 mos7840_bulk_out_data_callback, mos7840_port);
1412 }
1413
1414 data1 = urb->transfer_buffer;
1415 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1416
1417 if (mos7840_port->has_led)
1418 mos7840_led_activity(port);
1419
1420 /* send it down the pipe */
1421 status = usb_submit_urb(urb, GFP_ATOMIC);
1422
1423 if (status) {
1424 mos7840_port->busy[i] = 0;
1425 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1426 "with status = %d\n", __func__, status);
1427 bytes_sent = status;
1428 goto exit;
1429 }
1430 bytes_sent = transfer_size;
1431 port->icount.tx += transfer_size;
1432 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
1433 exit:
1434 return bytes_sent;
1435
1436 }
1437
1438 /*****************************************************************************
1439 * mos7840_throttle
1440 * this function is called by the tty driver when it wants to stop the data
1441 * being read from the port.
1442 *****************************************************************************/
1443
1444 static void mos7840_throttle(struct tty_struct *tty)
1445 {
1446 struct usb_serial_port *port = tty->driver_data;
1447 struct moschip_port *mos7840_port;
1448 int status;
1449
1450 if (mos7840_port_paranoia_check(port, __func__))
1451 return;
1452
1453 mos7840_port = mos7840_get_port_private(port);
1454
1455 if (mos7840_port == NULL)
1456 return;
1457
1458 if (!mos7840_port->open) {
1459 dev_dbg(&port->dev, "%s", "port not opened\n");
1460 return;
1461 }
1462
1463 /* if we are implementing XON/XOFF, send the stop character */
1464 if (I_IXOFF(tty)) {
1465 unsigned char stop_char = STOP_CHAR(tty);
1466 status = mos7840_write(tty, port, &stop_char, 1);
1467 if (status <= 0)
1468 return;
1469 }
1470 /* if we are implementing RTS/CTS, toggle that line */
1471 if (tty->termios.c_cflag & CRTSCTS) {
1472 mos7840_port->shadowMCR &= ~MCR_RTS;
1473 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1474 mos7840_port->shadowMCR);
1475 if (status < 0)
1476 return;
1477 }
1478 }
1479
1480 /*****************************************************************************
1481 * mos7840_unthrottle
1482 * this function is called by the tty driver when it wants to resume
1483 * the data being read from the port (called after mos7840_throttle is
1484 * called)
1485 *****************************************************************************/
1486 static void mos7840_unthrottle(struct tty_struct *tty)
1487 {
1488 struct usb_serial_port *port = tty->driver_data;
1489 int status;
1490 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1491
1492 if (mos7840_port_paranoia_check(port, __func__))
1493 return;
1494
1495 if (mos7840_port == NULL)
1496 return;
1497
1498 if (!mos7840_port->open) {
1499 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1500 return;
1501 }
1502
1503 /* if we are implementing XON/XOFF, send the start character */
1504 if (I_IXOFF(tty)) {
1505 unsigned char start_char = START_CHAR(tty);
1506 status = mos7840_write(tty, port, &start_char, 1);
1507 if (status <= 0)
1508 return;
1509 }
1510
1511 /* if we are implementing RTS/CTS, toggle that line */
1512 if (tty->termios.c_cflag & CRTSCTS) {
1513 mos7840_port->shadowMCR |= MCR_RTS;
1514 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1515 mos7840_port->shadowMCR);
1516 if (status < 0)
1517 return;
1518 }
1519 }
1520
1521 static int mos7840_tiocmget(struct tty_struct *tty)
1522 {
1523 struct usb_serial_port *port = tty->driver_data;
1524 struct moschip_port *mos7840_port;
1525 unsigned int result;
1526 __u16 msr;
1527 __u16 mcr;
1528 int status;
1529 mos7840_port = mos7840_get_port_private(port);
1530
1531 if (mos7840_port == NULL)
1532 return -ENODEV;
1533
1534 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1535 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1536 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1537 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1538 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1539 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1540 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1541 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1542 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1543
1544 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1545
1546 return result;
1547 }
1548
1549 static int mos7840_tiocmset(struct tty_struct *tty,
1550 unsigned int set, unsigned int clear)
1551 {
1552 struct usb_serial_port *port = tty->driver_data;
1553 struct moschip_port *mos7840_port;
1554 unsigned int mcr;
1555 int status;
1556
1557 mos7840_port = mos7840_get_port_private(port);
1558
1559 if (mos7840_port == NULL)
1560 return -ENODEV;
1561
1562 /* FIXME: What locks the port registers ? */
1563 mcr = mos7840_port->shadowMCR;
1564 if (clear & TIOCM_RTS)
1565 mcr &= ~MCR_RTS;
1566 if (clear & TIOCM_DTR)
1567 mcr &= ~MCR_DTR;
1568 if (clear & TIOCM_LOOP)
1569 mcr &= ~MCR_LOOPBACK;
1570
1571 if (set & TIOCM_RTS)
1572 mcr |= MCR_RTS;
1573 if (set & TIOCM_DTR)
1574 mcr |= MCR_DTR;
1575 if (set & TIOCM_LOOP)
1576 mcr |= MCR_LOOPBACK;
1577
1578 mos7840_port->shadowMCR = mcr;
1579
1580 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1581 if (status < 0) {
1582 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1583 return status;
1584 }
1585
1586 return 0;
1587 }
1588
1589 /*****************************************************************************
1590 * mos7840_calc_baud_rate_divisor
1591 * this function calculates the proper baud rate divisor for the specified
1592 * baud rate.
1593 *****************************************************************************/
1594 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1595 int baudRate, int *divisor,
1596 __u16 *clk_sel_val)
1597 {
1598 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1599
1600 if (baudRate <= 115200) {
1601 *divisor = 115200 / baudRate;
1602 *clk_sel_val = 0x0;
1603 }
1604 if ((baudRate > 115200) && (baudRate <= 230400)) {
1605 *divisor = 230400 / baudRate;
1606 *clk_sel_val = 0x10;
1607 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1608 *divisor = 403200 / baudRate;
1609 *clk_sel_val = 0x20;
1610 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1611 *divisor = 460800 / baudRate;
1612 *clk_sel_val = 0x30;
1613 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1614 *divisor = 806400 / baudRate;
1615 *clk_sel_val = 0x40;
1616 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1617 *divisor = 921600 / baudRate;
1618 *clk_sel_val = 0x50;
1619 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1620 *divisor = 1572864 / baudRate;
1621 *clk_sel_val = 0x60;
1622 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1623 *divisor = 3145728 / baudRate;
1624 *clk_sel_val = 0x70;
1625 }
1626 return 0;
1627
1628 #ifdef NOTMCS7840
1629
1630 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1631 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1632 *divisor = mos7840_divisor_table[i].Divisor;
1633 return 0;
1634 }
1635 }
1636
1637 /* After trying for all the standard baud rates *
1638 * Try calculating the divisor for this baud rate */
1639
1640 if (baudrate > 75 && baudrate < 230400) {
1641 /* get the divisor */
1642 custom = (__u16) (230400L / baudrate);
1643
1644 /* Check for round off */
1645 round1 = (__u16) (2304000L / baudrate);
1646 round = (__u16) (round1 - (custom * 10));
1647 if (round > 4)
1648 custom++;
1649 *divisor = custom;
1650
1651 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1652 return 0;
1653 }
1654
1655 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1656 return -1;
1657 #endif
1658 }
1659
1660 /*****************************************************************************
1661 * mos7840_send_cmd_write_baud_rate
1662 * this function sends the proper command to change the baud rate of the
1663 * specified port.
1664 *****************************************************************************/
1665
1666 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1667 int baudRate)
1668 {
1669 int divisor = 0;
1670 int status;
1671 __u16 Data;
1672 unsigned char number;
1673 __u16 clk_sel_val;
1674 struct usb_serial_port *port;
1675
1676 if (mos7840_port == NULL)
1677 return -1;
1678
1679 port = mos7840_port->port;
1680 if (mos7840_port_paranoia_check(port, __func__))
1681 return -1;
1682
1683 if (mos7840_serial_paranoia_check(port->serial, __func__))
1684 return -1;
1685
1686 number = mos7840_port->port->port_number;
1687
1688 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1689 /* reset clk_uart_sel in spregOffset */
1690 if (baudRate > 115200) {
1691 #ifdef HW_flow_control
1692 /* NOTE: need to see the pther register to modify */
1693 /* setting h/w flow control bit to 1 */
1694 Data = 0x2b;
1695 mos7840_port->shadowMCR = Data;
1696 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1697 Data);
1698 if (status < 0) {
1699 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1700 return -1;
1701 }
1702 #endif
1703
1704 } else {
1705 #ifdef HW_flow_control
1706 /* setting h/w flow control bit to 0 */
1707 Data = 0xb;
1708 mos7840_port->shadowMCR = Data;
1709 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1710 Data);
1711 if (status < 0) {
1712 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1713 return -1;
1714 }
1715 #endif
1716
1717 }
1718
1719 if (1) { /* baudRate <= 115200) */
1720 clk_sel_val = 0x0;
1721 Data = 0x0;
1722 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1723 &clk_sel_val);
1724 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1725 &Data);
1726 if (status < 0) {
1727 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1728 return -1;
1729 }
1730 Data = (Data & 0x8f) | clk_sel_val;
1731 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1732 Data);
1733 if (status < 0) {
1734 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1735 return -1;
1736 }
1737 /* Calculate the Divisor */
1738
1739 if (status) {
1740 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1741 return status;
1742 }
1743 /* Enable access to divisor latch */
1744 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1745 mos7840_port->shadowLCR = Data;
1746 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1747
1748 /* Write the divisor */
1749 Data = (unsigned char)(divisor & 0xff);
1750 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1751 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1752
1753 Data = (unsigned char)((divisor & 0xff00) >> 8);
1754 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1755 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1756
1757 /* Disable access to divisor latch */
1758 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1759 mos7840_port->shadowLCR = Data;
1760 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1761
1762 }
1763 return status;
1764 }
1765
1766 /*****************************************************************************
1767 * mos7840_change_port_settings
1768 * This routine is called to set the UART on the device to match
1769 * the specified new settings.
1770 *****************************************************************************/
1771
1772 static void mos7840_change_port_settings(struct tty_struct *tty,
1773 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1774 {
1775 int baud;
1776 unsigned cflag;
1777 unsigned iflag;
1778 __u8 lData;
1779 __u8 lParity;
1780 __u8 lStop;
1781 int status;
1782 __u16 Data;
1783 struct usb_serial_port *port;
1784 struct usb_serial *serial;
1785
1786 if (mos7840_port == NULL)
1787 return;
1788
1789 port = mos7840_port->port;
1790
1791 if (mos7840_port_paranoia_check(port, __func__))
1792 return;
1793
1794 if (mos7840_serial_paranoia_check(port->serial, __func__))
1795 return;
1796
1797 serial = port->serial;
1798
1799 if (!mos7840_port->open) {
1800 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1801 return;
1802 }
1803
1804 lData = LCR_BITS_8;
1805 lStop = LCR_STOP_1;
1806 lParity = LCR_PAR_NONE;
1807
1808 cflag = tty->termios.c_cflag;
1809 iflag = tty->termios.c_iflag;
1810
1811 /* Change the number of bits */
1812 if (cflag & CSIZE) {
1813 switch (cflag & CSIZE) {
1814 case CS5:
1815 lData = LCR_BITS_5;
1816 break;
1817
1818 case CS6:
1819 lData = LCR_BITS_6;
1820 break;
1821
1822 case CS7:
1823 lData = LCR_BITS_7;
1824 break;
1825 default:
1826 case CS8:
1827 lData = LCR_BITS_8;
1828 break;
1829 }
1830 }
1831 /* Change the Parity bit */
1832 if (cflag & PARENB) {
1833 if (cflag & PARODD) {
1834 lParity = LCR_PAR_ODD;
1835 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1836 } else {
1837 lParity = LCR_PAR_EVEN;
1838 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1839 }
1840
1841 } else {
1842 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1843 }
1844
1845 if (cflag & CMSPAR)
1846 lParity = lParity | 0x20;
1847
1848 /* Change the Stop bit */
1849 if (cflag & CSTOPB) {
1850 lStop = LCR_STOP_2;
1851 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1852 } else {
1853 lStop = LCR_STOP_1;
1854 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1855 }
1856
1857 /* Update the LCR with the correct value */
1858 mos7840_port->shadowLCR &=
1859 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1860 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1861
1862 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1863 mos7840_port->shadowLCR);
1864 /* Disable Interrupts */
1865 Data = 0x00;
1866 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1867
1868 Data = 0x00;
1869 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1870
1871 Data = 0xcf;
1872 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1873
1874 /* Send the updated LCR value to the mos7840 */
1875 Data = mos7840_port->shadowLCR;
1876
1877 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1878
1879 Data = 0x00b;
1880 mos7840_port->shadowMCR = Data;
1881 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1882 Data = 0x00b;
1883 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1884
1885 /* set up the MCR register and send it to the mos7840 */
1886
1887 mos7840_port->shadowMCR = MCR_MASTER_IE;
1888 if (cflag & CBAUD)
1889 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1890
1891 if (cflag & CRTSCTS)
1892 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1893 else
1894 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1895
1896 Data = mos7840_port->shadowMCR;
1897 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1898
1899 /* Determine divisor based on baud rate */
1900 baud = tty_get_baud_rate(tty);
1901
1902 if (!baud) {
1903 /* pick a default, any default... */
1904 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1905 baud = 9600;
1906 }
1907
1908 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1909 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1910
1911 /* Enable Interrupts */
1912 Data = 0x0c;
1913 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1914
1915 if (mos7840_port->read_urb_busy == false) {
1916 mos7840_port->read_urb_busy = true;
1917 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1918 if (status) {
1919 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1920 status);
1921 mos7840_port->read_urb_busy = false;
1922 }
1923 }
1924 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1925 mos7840_port->shadowLCR);
1926 }
1927
1928 /*****************************************************************************
1929 * mos7840_set_termios
1930 * this function is called by the tty driver when it wants to change
1931 * the termios structure
1932 *****************************************************************************/
1933
1934 static void mos7840_set_termios(struct tty_struct *tty,
1935 struct usb_serial_port *port,
1936 struct ktermios *old_termios)
1937 {
1938 int status;
1939 unsigned int cflag;
1940 struct usb_serial *serial;
1941 struct moschip_port *mos7840_port;
1942
1943 if (mos7840_port_paranoia_check(port, __func__))
1944 return;
1945
1946 serial = port->serial;
1947
1948 if (mos7840_serial_paranoia_check(serial, __func__))
1949 return;
1950
1951 mos7840_port = mos7840_get_port_private(port);
1952
1953 if (mos7840_port == NULL)
1954 return;
1955
1956 if (!mos7840_port->open) {
1957 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1958 return;
1959 }
1960
1961 dev_dbg(&port->dev, "%s", "setting termios - \n");
1962
1963 cflag = tty->termios.c_cflag;
1964
1965 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
1966 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
1967 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
1968 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
1969
1970 /* change the port settings to the new ones specified */
1971
1972 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1973
1974 if (!mos7840_port->read_urb) {
1975 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
1976 return;
1977 }
1978
1979 if (mos7840_port->read_urb_busy == false) {
1980 mos7840_port->read_urb_busy = true;
1981 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1982 if (status) {
1983 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1984 status);
1985 mos7840_port->read_urb_busy = false;
1986 }
1987 }
1988 }
1989
1990 /*****************************************************************************
1991 * mos7840_get_lsr_info - get line status register info
1992 *
1993 * Purpose: Let user call ioctl() to get info when the UART physically
1994 * is emptied. On bus types like RS485, the transmitter must
1995 * release the bus after transmitting. This must be done when
1996 * the transmit shift register is empty, not be done when the
1997 * transmit holding register is empty. This functionality
1998 * allows an RS485 driver to be written in user space.
1999 *****************************************************************************/
2000
2001 static int mos7840_get_lsr_info(struct tty_struct *tty,
2002 unsigned int __user *value)
2003 {
2004 int count;
2005 unsigned int result = 0;
2006
2007 count = mos7840_chars_in_buffer(tty);
2008 if (count == 0)
2009 result = TIOCSER_TEMT;
2010
2011 if (copy_to_user(value, &result, sizeof(int)))
2012 return -EFAULT;
2013 return 0;
2014 }
2015
2016 /*****************************************************************************
2017 * mos7840_get_serial_info
2018 * function to get information about serial port
2019 *****************************************************************************/
2020
2021 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2022 struct serial_struct __user *retinfo)
2023 {
2024 struct serial_struct tmp;
2025
2026 if (mos7840_port == NULL)
2027 return -1;
2028
2029 if (!retinfo)
2030 return -EFAULT;
2031
2032 memset(&tmp, 0, sizeof(tmp));
2033
2034 tmp.type = PORT_16550A;
2035 tmp.line = mos7840_port->port->minor;
2036 tmp.port = mos7840_port->port->port_number;
2037 tmp.irq = 0;
2038 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2039 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2040 tmp.baud_base = 9600;
2041 tmp.close_delay = 5 * HZ;
2042 tmp.closing_wait = 30 * HZ;
2043
2044 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2045 return -EFAULT;
2046 return 0;
2047 }
2048
2049 /*****************************************************************************
2050 * SerialIoctl
2051 * this function handles any ioctl calls to the driver
2052 *****************************************************************************/
2053
2054 static int mos7840_ioctl(struct tty_struct *tty,
2055 unsigned int cmd, unsigned long arg)
2056 {
2057 struct usb_serial_port *port = tty->driver_data;
2058 void __user *argp = (void __user *)arg;
2059 struct moschip_port *mos7840_port;
2060
2061 if (mos7840_port_paranoia_check(port, __func__))
2062 return -1;
2063
2064 mos7840_port = mos7840_get_port_private(port);
2065
2066 if (mos7840_port == NULL)
2067 return -1;
2068
2069 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
2070
2071 switch (cmd) {
2072 /* return number of bytes available */
2073
2074 case TIOCSERGETLSR:
2075 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2076 return mos7840_get_lsr_info(tty, argp);
2077
2078 case TIOCGSERIAL:
2079 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2080 return mos7840_get_serial_info(mos7840_port, argp);
2081
2082 case TIOCSSERIAL:
2083 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2084 break;
2085 default:
2086 break;
2087 }
2088 return -ENOIOCTLCMD;
2089 }
2090
2091 static int mos7810_check(struct usb_serial *serial)
2092 {
2093 int i, pass_count = 0;
2094 u8 *buf;
2095 __u16 data = 0, mcr_data = 0;
2096 __u16 test_pattern = 0x55AA;
2097 int res;
2098
2099 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2100 if (!buf)
2101 return 0; /* failed to identify 7810 */
2102
2103 /* Store MCR setting */
2104 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2105 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2106 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2107 if (res == VENDOR_READ_LENGTH)
2108 mcr_data = *buf;
2109
2110 for (i = 0; i < 16; i++) {
2111 /* Send the 1-bit test pattern out to MCS7810 test pin */
2112 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2113 MCS_WRREQ, MCS_WR_RTYPE,
2114 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2115 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2116
2117 /* Read the test pattern back */
2118 res = usb_control_msg(serial->dev,
2119 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2120 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2121 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2122 if (res == VENDOR_READ_LENGTH)
2123 data = *buf;
2124
2125 /* If this is a MCS7810 device, both test patterns must match */
2126 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2127 break;
2128
2129 pass_count++;
2130 }
2131
2132 /* Restore MCR setting */
2133 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2134 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2135 0, MOS_WDR_TIMEOUT);
2136
2137 kfree(buf);
2138
2139 if (pass_count == 16)
2140 return 1;
2141
2142 return 0;
2143 }
2144
2145 static int mos7840_probe(struct usb_serial *serial,
2146 const struct usb_device_id *id)
2147 {
2148 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
2149 u8 *buf;
2150 int device_type;
2151
2152 if (product == MOSCHIP_DEVICE_ID_7810 ||
2153 product == MOSCHIP_DEVICE_ID_7820) {
2154 device_type = product;
2155 goto out;
2156 }
2157
2158 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2159 if (!buf)
2160 return -ENOMEM;
2161
2162 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2163 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2164 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2165
2166 /* For a MCS7840 device GPIO0 must be set to 1 */
2167 if (buf[0] & 0x01)
2168 device_type = MOSCHIP_DEVICE_ID_7840;
2169 else if (mos7810_check(serial))
2170 device_type = MOSCHIP_DEVICE_ID_7810;
2171 else
2172 device_type = MOSCHIP_DEVICE_ID_7820;
2173
2174 kfree(buf);
2175 out:
2176 usb_set_serial_data(serial, (void *)(unsigned long)device_type);
2177
2178 return 0;
2179 }
2180
2181 static int mos7840_calc_num_ports(struct usb_serial *serial)
2182 {
2183 int device_type = (unsigned long)usb_get_serial_data(serial);
2184 int mos7840_num_ports;
2185
2186 mos7840_num_ports = (device_type >> 4) & 0x000F;
2187
2188 return mos7840_num_ports;
2189 }
2190
2191 static int mos7840_port_probe(struct usb_serial_port *port)
2192 {
2193 struct usb_serial *serial = port->serial;
2194 int device_type = (unsigned long)usb_get_serial_data(serial);
2195 struct moschip_port *mos7840_port;
2196 int status;
2197 int pnum;
2198 __u16 Data;
2199
2200 /* we set up the pointers to the endpoints in the mos7840_open *
2201 * function, as the structures aren't created yet. */
2202
2203 pnum = port->port_number;
2204
2205 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2206 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2207 if (mos7840_port == NULL) {
2208 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2209 return -ENOMEM;
2210 }
2211
2212 /* Initialize all port interrupt end point to port 0 int
2213 * endpoint. Our device has only one interrupt end point
2214 * common to all port */
2215
2216 mos7840_port->port = port;
2217 mos7840_set_port_private(port, mos7840_port);
2218 spin_lock_init(&mos7840_port->pool_lock);
2219
2220 /* minor is not initialised until later by
2221 * usb-serial.c:get_free_serial() and cannot therefore be used
2222 * to index device instances */
2223 mos7840_port->port_num = pnum + 1;
2224 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
2225 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2226
2227 if (mos7840_port->port_num == 1) {
2228 mos7840_port->SpRegOffset = 0x0;
2229 mos7840_port->ControlRegOffset = 0x1;
2230 mos7840_port->DcrRegOffset = 0x4;
2231 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2232 mos7840_port->SpRegOffset = 0x8;
2233 mos7840_port->ControlRegOffset = 0x9;
2234 mos7840_port->DcrRegOffset = 0x16;
2235 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2236 mos7840_port->SpRegOffset = 0xa;
2237 mos7840_port->ControlRegOffset = 0xb;
2238 mos7840_port->DcrRegOffset = 0x19;
2239 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2240 mos7840_port->SpRegOffset = 0xa;
2241 mos7840_port->ControlRegOffset = 0xb;
2242 mos7840_port->DcrRegOffset = 0x19;
2243 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2244 mos7840_port->SpRegOffset = 0xc;
2245 mos7840_port->ControlRegOffset = 0xd;
2246 mos7840_port->DcrRegOffset = 0x1c;
2247 }
2248 mos7840_dump_serial_port(port, mos7840_port);
2249 mos7840_set_port_private(port, mos7840_port);
2250
2251 /* enable rx_disable bit in control register */
2252 status = mos7840_get_reg_sync(port,
2253 mos7840_port->ControlRegOffset, &Data);
2254 if (status < 0) {
2255 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2256 goto out;
2257 } else
2258 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2259 Data |= 0x08; /* setting driver done bit */
2260 Data |= 0x04; /* sp1_bit to have cts change reflect in
2261 modem status reg */
2262
2263 /* Data |= 0x20; //rx_disable bit */
2264 status = mos7840_set_reg_sync(port,
2265 mos7840_port->ControlRegOffset, Data);
2266 if (status < 0) {
2267 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2268 goto out;
2269 } else
2270 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2271
2272 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2273 and 0x24 in DCR3 */
2274 Data = 0x01;
2275 status = mos7840_set_reg_sync(port,
2276 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2277 if (status < 0) {
2278 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2279 goto out;
2280 } else
2281 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2282
2283 Data = 0x05;
2284 status = mos7840_set_reg_sync(port,
2285 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2286 if (status < 0) {
2287 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2288 goto out;
2289 } else
2290 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2291
2292 Data = 0x24;
2293 status = mos7840_set_reg_sync(port,
2294 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2295 if (status < 0) {
2296 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2297 goto out;
2298 } else
2299 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2300
2301 /* write values in clkstart0x0 and clkmulti 0x20 */
2302 Data = 0x0;
2303 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2304 if (status < 0) {
2305 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2306 goto out;
2307 } else
2308 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2309
2310 Data = 0x20;
2311 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2312 if (status < 0) {
2313 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2314 goto error;
2315 } else
2316 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2317
2318 /* write value 0x0 to scratchpad register */
2319 Data = 0x00;
2320 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2321 if (status < 0) {
2322 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2323 goto out;
2324 } else
2325 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2326
2327 /* Zero Length flag register */
2328 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2329 Data = 0xff;
2330 status = mos7840_set_reg_sync(port,
2331 (__u16) (ZLP_REG1 +
2332 ((__u16)mos7840_port->port_num)), Data);
2333 dev_dbg(&port->dev, "ZLIP offset %x\n",
2334 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2335 if (status < 0) {
2336 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2337 goto out;
2338 } else
2339 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2340 } else {
2341 Data = 0xff;
2342 status = mos7840_set_reg_sync(port,
2343 (__u16) (ZLP_REG1 +
2344 ((__u16)mos7840_port->port_num) - 0x1), Data);
2345 dev_dbg(&port->dev, "ZLIP offset %x\n",
2346 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2347 if (status < 0) {
2348 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2349 goto out;
2350 } else
2351 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2352
2353 }
2354 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2355 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2356 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2357 GFP_KERNEL);
2358 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2359 !mos7840_port->dr) {
2360 status = -ENOMEM;
2361 goto error;
2362 }
2363
2364 mos7840_port->has_led = false;
2365
2366 /* Initialize LED timers */
2367 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2368 mos7840_port->has_led = true;
2369
2370 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2371 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2372 GFP_KERNEL);
2373 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2374 status = -ENOMEM;
2375 goto error;
2376 }
2377
2378 init_timer(&mos7840_port->led_timer1);
2379 mos7840_port->led_timer1.function = mos7840_led_off;
2380 mos7840_port->led_timer1.expires =
2381 jiffies + msecs_to_jiffies(LED_ON_MS);
2382 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2383
2384 init_timer(&mos7840_port->led_timer2);
2385 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2386 mos7840_port->led_timer2.expires =
2387 jiffies + msecs_to_jiffies(LED_OFF_MS);
2388 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2389
2390 /* Turn off LED */
2391 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2392 }
2393 out:
2394 if (pnum == serial->num_ports - 1) {
2395 /* Zero Length flag enable */
2396 Data = 0x0f;
2397 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2398 if (status < 0) {
2399 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2400 goto error;
2401 } else
2402 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2403
2404 /* setting configuration feature to one */
2405 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2406 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2407 MOS_WDR_TIMEOUT);
2408 }
2409 return 0;
2410 error:
2411 kfree(mos7840_port->led_dr);
2412 usb_free_urb(mos7840_port->led_urb);
2413 kfree(mos7840_port->dr);
2414 kfree(mos7840_port->ctrl_buf);
2415 usb_free_urb(mos7840_port->control_urb);
2416 kfree(mos7840_port);
2417
2418 return status;
2419 }
2420
2421 static int mos7840_port_remove(struct usb_serial_port *port)
2422 {
2423 struct moschip_port *mos7840_port;
2424
2425 mos7840_port = mos7840_get_port_private(port);
2426
2427 if (mos7840_port->has_led) {
2428 /* Turn off LED */
2429 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2430
2431 del_timer_sync(&mos7840_port->led_timer1);
2432 del_timer_sync(&mos7840_port->led_timer2);
2433
2434 usb_kill_urb(mos7840_port->led_urb);
2435 usb_free_urb(mos7840_port->led_urb);
2436 kfree(mos7840_port->led_dr);
2437 }
2438 usb_kill_urb(mos7840_port->control_urb);
2439 usb_free_urb(mos7840_port->control_urb);
2440 kfree(mos7840_port->ctrl_buf);
2441 kfree(mos7840_port->dr);
2442 kfree(mos7840_port);
2443
2444 return 0;
2445 }
2446
2447 static struct usb_serial_driver moschip7840_4port_device = {
2448 .driver = {
2449 .owner = THIS_MODULE,
2450 .name = "mos7840",
2451 },
2452 .description = DRIVER_DESC,
2453 .id_table = id_table,
2454 .num_ports = 4,
2455 .open = mos7840_open,
2456 .close = mos7840_close,
2457 .write = mos7840_write,
2458 .write_room = mos7840_write_room,
2459 .chars_in_buffer = mos7840_chars_in_buffer,
2460 .throttle = mos7840_throttle,
2461 .unthrottle = mos7840_unthrottle,
2462 .calc_num_ports = mos7840_calc_num_ports,
2463 .probe = mos7840_probe,
2464 .ioctl = mos7840_ioctl,
2465 .set_termios = mos7840_set_termios,
2466 .break_ctl = mos7840_break,
2467 .tiocmget = mos7840_tiocmget,
2468 .tiocmset = mos7840_tiocmset,
2469 .tiocmiwait = usb_serial_generic_tiocmiwait,
2470 .get_icount = usb_serial_generic_get_icount,
2471 .port_probe = mos7840_port_probe,
2472 .port_remove = mos7840_port_remove,
2473 .read_bulk_callback = mos7840_bulk_in_callback,
2474 .read_int_callback = mos7840_interrupt_callback,
2475 };
2476
2477 static struct usb_serial_driver * const serial_drivers[] = {
2478 &moschip7840_4port_device, NULL
2479 };
2480
2481 module_usb_serial_driver(serial_drivers, id_table);
2482
2483 MODULE_DESCRIPTION(DRIVER_DESC);
2484 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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