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USB: mos7840: remove bogus disconnect test in close
[mirror_ubuntu-artful-kernel.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 static int device_type;
187
188 static const struct usb_device_id id_table[] = {
189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
206 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
207 {} /* terminating entry */
208 };
209 MODULE_DEVICE_TABLE(usb, id_table);
210
211 /* This structure holds all of the local port information */
212
213 struct moschip_port {
214 int port_num; /*Actual port number in the device(1,2,etc) */
215 struct urb *write_urb; /* write URB for this port */
216 struct urb *read_urb; /* read URB for this port */
217 __u8 shadowLCR; /* last LCR value received */
218 __u8 shadowMCR; /* last MCR value received */
219 char open;
220 char open_ports;
221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
222 int delta_msr_cond;
223 struct async_icount icount;
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 bool led_flag;
244 struct timer_list led_timer1; /* Timer for LED on */
245 struct timer_list led_timer2; /* Timer for LED off */
246 };
247
248 /*
249 * mos7840_set_reg_sync
250 * To set the Control register by calling usb_fill_control_urb function
251 * by passing usb_sndctrlpipe function as parameter.
252 */
253
254 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
255 __u16 val)
256 {
257 struct usb_device *dev = port->serial->dev;
258 val = val & 0x00ff;
259 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
260
261 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
262 MCS_WR_RTYPE, val, reg, NULL, 0,
263 MOS_WDR_TIMEOUT);
264 }
265
266 /*
267 * mos7840_get_reg_sync
268 * To set the Uart register by calling usb_fill_control_urb function by
269 * passing usb_rcvctrlpipe function as parameter.
270 */
271
272 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
273 __u16 *val)
274 {
275 struct usb_device *dev = port->serial->dev;
276 int ret = 0;
277 u8 *buf;
278
279 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
280 if (!buf)
281 return -ENOMEM;
282
283 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
284 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
285 MOS_WDR_TIMEOUT);
286 *val = buf[0];
287 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
288
289 kfree(buf);
290 return ret;
291 }
292
293 /*
294 * mos7840_set_uart_reg
295 * To set the Uart register by calling usb_fill_control_urb function by
296 * passing usb_sndctrlpipe function as parameter.
297 */
298
299 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
300 __u16 val)
301 {
302
303 struct usb_device *dev = port->serial->dev;
304 val = val & 0x00ff;
305 /* For the UART control registers, the application number need
306 to be Or'ed */
307 if (port->serial->num_ports == 4) {
308 val |= (((__u16) port->number -
309 (__u16) (port->serial->minor)) + 1) << 8;
310 } else {
311 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
312 val |= (((__u16) port->number -
313 (__u16) (port->serial->minor)) + 1) << 8;
314 } else {
315 val |= (((__u16) port->number -
316 (__u16) (port->serial->minor)) + 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 =
346 (((__u16) port->number - (__u16) (port->serial->minor)) +
347 1) << 8;
348 } else {
349 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
350 Wval = (((__u16) port->number -
351 (__u16) (port->serial->minor)) + 1) << 8;
352 } else {
353 Wval = (((__u16) port->number -
354 (__u16) (port->serial->minor)) + 2) << 8;
355 }
356 }
357 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
358 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
359 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
360 MOS_WDR_TIMEOUT);
361 *val = buf[0];
362
363 kfree(buf);
364 return ret;
365 }
366
367 static void mos7840_dump_serial_port(struct usb_serial_port *port,
368 struct moschip_port *mos7840_port)
369 {
370
371 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
372 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
373 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
374
375 }
376
377 /************************************************************************/
378 /************************************************************************/
379 /* I N T E R F A C E F U N C T I O N S */
380 /* I N T E R F A C E F U N C T I O N S */
381 /************************************************************************/
382 /************************************************************************/
383
384 static inline void mos7840_set_port_private(struct usb_serial_port *port,
385 struct moschip_port *data)
386 {
387 usb_set_serial_port_data(port, (void *)data);
388 }
389
390 static inline struct moschip_port *mos7840_get_port_private(struct
391 usb_serial_port
392 *port)
393 {
394 return (struct moschip_port *)usb_get_serial_port_data(port);
395 }
396
397 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
398 {
399 struct moschip_port *mos7840_port;
400 struct async_icount *icount;
401 mos7840_port = port;
402 icount = &mos7840_port->icount;
403 if (new_msr &
404 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
405 MOS_MSR_DELTA_CD)) {
406 icount = &mos7840_port->icount;
407
408 /* update input line counters */
409 if (new_msr & MOS_MSR_DELTA_CTS) {
410 icount->cts++;
411 smp_wmb();
412 }
413 if (new_msr & MOS_MSR_DELTA_DSR) {
414 icount->dsr++;
415 smp_wmb();
416 }
417 if (new_msr & MOS_MSR_DELTA_CD) {
418 icount->dcd++;
419 smp_wmb();
420 }
421 if (new_msr & MOS_MSR_DELTA_RI) {
422 icount->rng++;
423 smp_wmb();
424 }
425
426 mos7840_port->delta_msr_cond = 1;
427 wake_up_interruptible(&port->port->delta_msr_wait);
428 }
429 }
430
431 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
432 {
433 struct async_icount *icount;
434
435 if (new_lsr & SERIAL_LSR_BI) {
436 /*
437 * Parity and Framing errors only count if they
438 * occur exclusive of a break being
439 * received.
440 */
441 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
442 }
443
444 /* update input line counters */
445 icount = &port->icount;
446 if (new_lsr & SERIAL_LSR_BI) {
447 icount->brk++;
448 smp_wmb();
449 }
450 if (new_lsr & SERIAL_LSR_OE) {
451 icount->overrun++;
452 smp_wmb();
453 }
454 if (new_lsr & SERIAL_LSR_PE) {
455 icount->parity++;
456 smp_wmb();
457 }
458 if (new_lsr & SERIAL_LSR_FE) {
459 icount->frame++;
460 smp_wmb();
461 }
462 }
463
464 /************************************************************************/
465 /************************************************************************/
466 /* U S B C A L L B A C K F U N C T I O N S */
467 /* U S B C A L L B A C K F U N C T I O N S */
468 /************************************************************************/
469 /************************************************************************/
470
471 static void mos7840_control_callback(struct urb *urb)
472 {
473 unsigned char *data;
474 struct moschip_port *mos7840_port;
475 struct device *dev = &urb->dev->dev;
476 __u8 regval = 0x0;
477 int status = urb->status;
478
479 mos7840_port = urb->context;
480
481 switch (status) {
482 case 0:
483 /* success */
484 break;
485 case -ECONNRESET:
486 case -ENOENT:
487 case -ESHUTDOWN:
488 /* this urb is terminated, clean up */
489 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
490 return;
491 default:
492 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
493 return;
494 }
495
496 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
497 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
498 mos7840_port->MsrLsr, mos7840_port->port_num);
499 data = urb->transfer_buffer;
500 regval = (__u8) data[0];
501 dev_dbg(dev, "%s data is %x\n", __func__, regval);
502 if (mos7840_port->MsrLsr == 0)
503 mos7840_handle_new_msr(mos7840_port, regval);
504 else if (mos7840_port->MsrLsr == 1)
505 mos7840_handle_new_lsr(mos7840_port, regval);
506 }
507
508 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
509 __u16 *val)
510 {
511 struct usb_device *dev = mcs->port->serial->dev;
512 struct usb_ctrlrequest *dr = mcs->dr;
513 unsigned char *buffer = mcs->ctrl_buf;
514 int ret;
515
516 dr->bRequestType = MCS_RD_RTYPE;
517 dr->bRequest = MCS_RDREQ;
518 dr->wValue = cpu_to_le16(Wval); /* 0 */
519 dr->wIndex = cpu_to_le16(reg);
520 dr->wLength = cpu_to_le16(2);
521
522 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
523 (unsigned char *)dr, buffer, 2,
524 mos7840_control_callback, mcs);
525 mcs->control_urb->transfer_buffer_length = 2;
526 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
527 return ret;
528 }
529
530 static void mos7840_set_led_callback(struct urb *urb)
531 {
532 switch (urb->status) {
533 case 0:
534 /* Success */
535 break;
536 case -ECONNRESET:
537 case -ENOENT:
538 case -ESHUTDOWN:
539 /* This urb is terminated, clean up */
540 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
541 __func__, urb->status);
542 break;
543 default:
544 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
545 __func__, urb->status);
546 }
547 }
548
549 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
550 __u16 reg)
551 {
552 struct usb_device *dev = mcs->port->serial->dev;
553 struct usb_ctrlrequest *dr = mcs->dr;
554
555 dr->bRequestType = MCS_WR_RTYPE;
556 dr->bRequest = MCS_WRREQ;
557 dr->wValue = cpu_to_le16(wval);
558 dr->wIndex = cpu_to_le16(reg);
559 dr->wLength = cpu_to_le16(0);
560
561 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
562 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
563
564 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
565 }
566
567 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
568 __u16 val)
569 {
570 struct usb_device *dev = port->serial->dev;
571
572 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
573 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
574 }
575
576 static void mos7840_led_off(unsigned long arg)
577 {
578 struct moschip_port *mcs = (struct moschip_port *) arg;
579
580 /* Turn off LED */
581 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
582 mod_timer(&mcs->led_timer2,
583 jiffies + msecs_to_jiffies(LED_OFF_MS));
584 }
585
586 static void mos7840_led_flag_off(unsigned long arg)
587 {
588 struct moschip_port *mcs = (struct moschip_port *) arg;
589
590 mcs->led_flag = false;
591 }
592
593 /*****************************************************************************
594 * mos7840_interrupt_callback
595 * this is the callback function for when we have received data on the
596 * interrupt endpoint.
597 *****************************************************************************/
598
599 static void mos7840_interrupt_callback(struct urb *urb)
600 {
601 int result;
602 int length;
603 struct moschip_port *mos7840_port;
604 struct usb_serial *serial;
605 __u16 Data;
606 unsigned char *data;
607 __u8 sp[5], st;
608 int i, rv = 0;
609 __u16 wval, wreg = 0;
610 int status = urb->status;
611
612 switch (status) {
613 case 0:
614 /* success */
615 break;
616 case -ECONNRESET:
617 case -ENOENT:
618 case -ESHUTDOWN:
619 /* this urb is terminated, clean up */
620 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
621 __func__, status);
622 return;
623 default:
624 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
625 __func__, status);
626 goto exit;
627 }
628
629 length = urb->actual_length;
630 data = urb->transfer_buffer;
631
632 serial = urb->context;
633
634 /* Moschip get 5 bytes
635 * Byte 1 IIR Port 1 (port.number is 0)
636 * Byte 2 IIR Port 2 (port.number is 1)
637 * Byte 3 IIR Port 3 (port.number is 2)
638 * Byte 4 IIR Port 4 (port.number is 3)
639 * Byte 5 FIFO status for both */
640
641 if (length && length > 5) {
642 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
643 return;
644 }
645
646 sp[0] = (__u8) data[0];
647 sp[1] = (__u8) data[1];
648 sp[2] = (__u8) data[2];
649 sp[3] = (__u8) data[3];
650 st = (__u8) data[4];
651
652 for (i = 0; i < serial->num_ports; i++) {
653 mos7840_port = mos7840_get_port_private(serial->port[i]);
654 wval =
655 (((__u16) serial->port[i]->number -
656 (__u16) (serial->minor)) + 1) << 8;
657 if (mos7840_port->open) {
658 if (sp[i] & 0x01) {
659 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
660 } else {
661 switch (sp[i] & 0x0f) {
662 case SERIAL_IIR_RLS:
663 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
664 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
665 mos7840_port->MsrLsr = 1;
666 wreg = LINE_STATUS_REGISTER;
667 break;
668 case SERIAL_IIR_MS:
669 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
670 mos7840_port->MsrLsr = 0;
671 wreg = MODEM_STATUS_REGISTER;
672 break;
673 }
674 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
675 }
676 }
677 }
678 if (!(rv < 0))
679 /* the completion handler for the control urb will resubmit */
680 return;
681 exit:
682 result = usb_submit_urb(urb, GFP_ATOMIC);
683 if (result) {
684 dev_err(&urb->dev->dev,
685 "%s - Error %d submitting interrupt urb\n",
686 __func__, result);
687 }
688 }
689
690 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
691 const char *function)
692 {
693 if (!port) {
694 pr_debug("%s - port == NULL\n", function);
695 return -1;
696 }
697 if (!port->serial) {
698 pr_debug("%s - port->serial == NULL\n", function);
699 return -1;
700 }
701
702 return 0;
703 }
704
705 /* Inline functions to check the sanity of a pointer that is passed to us */
706 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
707 const char *function)
708 {
709 if (!serial) {
710 pr_debug("%s - serial == NULL\n", function);
711 return -1;
712 }
713 if (!serial->type) {
714 pr_debug("%s - serial->type == NULL!\n", function);
715 return -1;
716 }
717
718 return 0;
719 }
720
721 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
722 const char *function)
723 {
724 /* if no port was specified, or it fails a paranoia check */
725 if (!port ||
726 mos7840_port_paranoia_check(port, function) ||
727 mos7840_serial_paranoia_check(port->serial, function)) {
728 /* then say that we don't have a valid usb_serial thing,
729 * which will end up genrating -ENODEV return values */
730 return NULL;
731 }
732
733 return port->serial;
734 }
735
736 /*****************************************************************************
737 * mos7840_bulk_in_callback
738 * this is the callback function for when we have received data on the
739 * bulk in endpoint.
740 *****************************************************************************/
741
742 static void mos7840_bulk_in_callback(struct urb *urb)
743 {
744 int retval;
745 unsigned char *data;
746 struct usb_serial *serial;
747 struct usb_serial_port *port;
748 struct moschip_port *mos7840_port;
749 int status = urb->status;
750
751 mos7840_port = urb->context;
752 if (!mos7840_port)
753 return;
754
755 if (status) {
756 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
757 mos7840_port->read_urb_busy = false;
758 return;
759 }
760
761 port = mos7840_port->port;
762 if (mos7840_port_paranoia_check(port, __func__)) {
763 mos7840_port->read_urb_busy = false;
764 return;
765 }
766
767 serial = mos7840_get_usb_serial(port, __func__);
768 if (!serial) {
769 mos7840_port->read_urb_busy = false;
770 return;
771 }
772
773 data = urb->transfer_buffer;
774 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
775
776 if (urb->actual_length) {
777 struct tty_port *tport = &mos7840_port->port->port;
778 tty_insert_flip_string(tport, data, urb->actual_length);
779 tty_flip_buffer_push(tport);
780 mos7840_port->icount.rx += urb->actual_length;
781 smp_wmb();
782 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
783 }
784
785 if (!mos7840_port->read_urb) {
786 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
787 mos7840_port->read_urb_busy = false;
788 return;
789 }
790
791 /* Turn on LED */
792 if (mos7840_port->has_led && !mos7840_port->led_flag) {
793 mos7840_port->led_flag = true;
794 mos7840_set_led_async(mos7840_port, 0x0301,
795 MODEM_CONTROL_REGISTER);
796 mod_timer(&mos7840_port->led_timer1,
797 jiffies + msecs_to_jiffies(LED_ON_MS));
798 }
799
800 mos7840_port->read_urb_busy = true;
801 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
802
803 if (retval) {
804 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
805 mos7840_port->read_urb_busy = false;
806 }
807 }
808
809 /*****************************************************************************
810 * mos7840_bulk_out_data_callback
811 * this is the callback function for when we have finished sending
812 * serial data on the bulk out endpoint.
813 *****************************************************************************/
814
815 static void mos7840_bulk_out_data_callback(struct urb *urb)
816 {
817 struct moschip_port *mos7840_port;
818 struct usb_serial_port *port;
819 struct tty_struct *tty;
820 int status = urb->status;
821 int i;
822
823 mos7840_port = urb->context;
824 port = mos7840_port->port;
825 spin_lock(&mos7840_port->pool_lock);
826 for (i = 0; i < NUM_URBS; i++) {
827 if (urb == mos7840_port->write_urb_pool[i]) {
828 mos7840_port->busy[i] = 0;
829 break;
830 }
831 }
832 spin_unlock(&mos7840_port->pool_lock);
833
834 if (status) {
835 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
836 return;
837 }
838
839 if (mos7840_port_paranoia_check(port, __func__))
840 return;
841
842 tty = tty_port_tty_get(&port->port);
843 if (tty && mos7840_port->open)
844 tty_wakeup(tty);
845 tty_kref_put(tty);
846
847 }
848
849 /************************************************************************/
850 /* 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 */
851 /************************************************************************/
852 #ifdef MCSSerialProbe
853 static int mos7840_serial_probe(struct usb_serial *serial,
854 const struct usb_device_id *id)
855 {
856
857 /*need to implement the mode_reg reading and updating\
858 structures usb_serial_ device_type\
859 (i.e num_ports, num_bulkin,bulkout etc) */
860 /* Also we can update the changes attach */
861 return 1;
862 }
863 #endif
864
865 /*****************************************************************************
866 * mos7840_open
867 * this function is called by the tty driver when a port is opened
868 * If successful, we return 0
869 * Otherwise we return a negative error number.
870 *****************************************************************************/
871
872 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
873 {
874 int response;
875 int j;
876 struct usb_serial *serial;
877 struct urb *urb;
878 __u16 Data;
879 int status;
880 struct moschip_port *mos7840_port;
881 struct moschip_port *port0;
882
883 if (mos7840_port_paranoia_check(port, __func__))
884 return -ENODEV;
885
886 serial = port->serial;
887
888 if (mos7840_serial_paranoia_check(serial, __func__))
889 return -ENODEV;
890
891 mos7840_port = mos7840_get_port_private(port);
892 port0 = mos7840_get_port_private(serial->port[0]);
893
894 if (mos7840_port == NULL || port0 == NULL)
895 return -ENODEV;
896
897 usb_clear_halt(serial->dev, port->write_urb->pipe);
898 usb_clear_halt(serial->dev, port->read_urb->pipe);
899 port0->open_ports++;
900
901 /* Initialising the write urb pool */
902 for (j = 0; j < NUM_URBS; ++j) {
903 urb = usb_alloc_urb(0, GFP_KERNEL);
904 mos7840_port->write_urb_pool[j] = urb;
905
906 if (urb == NULL) {
907 dev_err(&port->dev, "No more urbs???\n");
908 continue;
909 }
910
911 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
912 GFP_KERNEL);
913 if (!urb->transfer_buffer) {
914 usb_free_urb(urb);
915 mos7840_port->write_urb_pool[j] = NULL;
916 dev_err(&port->dev,
917 "%s-out of memory for urb buffers.\n",
918 __func__);
919 continue;
920 }
921 }
922
923 /*****************************************************************************
924 * Initialize MCS7840 -- Write Init values to corresponding Registers
925 *
926 * Register Index
927 * 1 : IER
928 * 2 : FCR
929 * 3 : LCR
930 * 4 : MCR
931 *
932 * 0x08 : SP1/2 Control Reg
933 *****************************************************************************/
934
935 /* NEED to check the following Block */
936
937 Data = 0x0;
938 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
939 if (status < 0) {
940 dev_dbg(&port->dev, "Reading Spreg failed\n");
941 return -1;
942 }
943 Data |= 0x80;
944 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
945 if (status < 0) {
946 dev_dbg(&port->dev, "writing Spreg failed\n");
947 return -1;
948 }
949
950 Data &= ~0x80;
951 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
952 if (status < 0) {
953 dev_dbg(&port->dev, "writing Spreg failed\n");
954 return -1;
955 }
956 /* End of block to be checked */
957
958 Data = 0x0;
959 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
960 &Data);
961 if (status < 0) {
962 dev_dbg(&port->dev, "Reading Controlreg failed\n");
963 return -1;
964 }
965 Data |= 0x08; /* Driver done bit */
966 Data |= 0x20; /* rx_disable */
967 status = mos7840_set_reg_sync(port,
968 mos7840_port->ControlRegOffset, Data);
969 if (status < 0) {
970 dev_dbg(&port->dev, "writing Controlreg failed\n");
971 return -1;
972 }
973 /* do register settings here */
974 /* Set all regs to the device default values. */
975 /***********************************
976 * First Disable all interrupts.
977 ***********************************/
978 Data = 0x00;
979 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
980 if (status < 0) {
981 dev_dbg(&port->dev, "disabling interrupts failed\n");
982 return -1;
983 }
984 /* Set FIFO_CONTROL_REGISTER to the default value */
985 Data = 0x00;
986 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
987 if (status < 0) {
988 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
989 return -1;
990 }
991
992 Data = 0xcf;
993 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
994 if (status < 0) {
995 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
996 return -1;
997 }
998
999 Data = 0x03;
1000 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1001 mos7840_port->shadowLCR = Data;
1002
1003 Data = 0x0b;
1004 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1005 mos7840_port->shadowMCR = Data;
1006
1007 Data = 0x00;
1008 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1009 mos7840_port->shadowLCR = Data;
1010
1011 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1012 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1013
1014 Data = 0x0c;
1015 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1016
1017 Data = 0x0;
1018 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1019
1020 Data = 0x00;
1021 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1022
1023 Data = Data & ~SERIAL_LCR_DLAB;
1024 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1025 mos7840_port->shadowLCR = Data;
1026
1027 /* clearing Bulkin and Bulkout Fifo */
1028 Data = 0x0;
1029 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1030
1031 Data = Data | 0x0c;
1032 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1033
1034 Data = Data & ~0x0c;
1035 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1036 /* Finally enable all interrupts */
1037 Data = 0x0c;
1038 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1039
1040 /* clearing rx_disable */
1041 Data = 0x0;
1042 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1043 &Data);
1044 Data = Data & ~0x20;
1045 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1046 Data);
1047
1048 /* rx_negate */
1049 Data = 0x0;
1050 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1051 &Data);
1052 Data = Data | 0x10;
1053 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1054 Data);
1055
1056 /* Check to see if we've set up our endpoint info yet *
1057 * (can't set it up in mos7840_startup as the structures *
1058 * were not set up at that time.) */
1059 if (port0->open_ports == 1) {
1060 if (serial->port[0]->interrupt_in_buffer == NULL) {
1061 /* set up interrupt urb */
1062 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1063 serial->dev,
1064 usb_rcvintpipe(serial->dev,
1065 serial->port[0]->interrupt_in_endpointAddress),
1066 serial->port[0]->interrupt_in_buffer,
1067 serial->port[0]->interrupt_in_urb->
1068 transfer_buffer_length,
1069 mos7840_interrupt_callback,
1070 serial,
1071 serial->port[0]->interrupt_in_urb->interval);
1072
1073 /* start interrupt read for mos7840 *
1074 * will continue as long as mos7840 is connected */
1075
1076 response =
1077 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1078 GFP_KERNEL);
1079 if (response) {
1080 dev_err(&port->dev, "%s - Error %d submitting "
1081 "interrupt urb\n", __func__, response);
1082 }
1083
1084 }
1085
1086 }
1087
1088 /* see if we've set up our endpoint info yet *
1089 * (can't set it up in mos7840_startup as the *
1090 * structures were not set up at that time.) */
1091
1092 dev_dbg(&port->dev, "port number is %d\n", port->number);
1093 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1094 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1095 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1096 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1097 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1098 mos7840_port->read_urb = port->read_urb;
1099
1100 /* set up our bulk in urb */
1101 if ((serial->num_ports == 2)
1102 && ((((__u16)port->number -
1103 (__u16)(port->serial->minor)) % 2) != 0)) {
1104 usb_fill_bulk_urb(mos7840_port->read_urb,
1105 serial->dev,
1106 usb_rcvbulkpipe(serial->dev,
1107 (port->bulk_in_endpointAddress) + 2),
1108 port->bulk_in_buffer,
1109 mos7840_port->read_urb->transfer_buffer_length,
1110 mos7840_bulk_in_callback, mos7840_port);
1111 } else {
1112 usb_fill_bulk_urb(mos7840_port->read_urb,
1113 serial->dev,
1114 usb_rcvbulkpipe(serial->dev,
1115 port->bulk_in_endpointAddress),
1116 port->bulk_in_buffer,
1117 mos7840_port->read_urb->transfer_buffer_length,
1118 mos7840_bulk_in_callback, mos7840_port);
1119 }
1120
1121 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1122 mos7840_port->read_urb_busy = true;
1123 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1124 if (response) {
1125 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1126 __func__, response);
1127 mos7840_port->read_urb_busy = false;
1128 }
1129
1130 /* initialize our wait queues */
1131 init_waitqueue_head(&mos7840_port->wait_chase);
1132
1133 /* initialize our icount structure */
1134 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1135
1136 /* initialize our port settings */
1137 /* Must set to enable ints! */
1138 mos7840_port->shadowMCR = MCR_MASTER_IE;
1139 /* send a open port command */
1140 mos7840_port->open = 1;
1141 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1142 mos7840_port->icount.tx = 0;
1143 mos7840_port->icount.rx = 0;
1144
1145 return 0;
1146 }
1147
1148 /*****************************************************************************
1149 * mos7840_chars_in_buffer
1150 * this function is called by the tty driver when it wants to know how many
1151 * bytes of data we currently have outstanding in the port (data that has
1152 * been written, but hasn't made it out the port yet)
1153 * If successful, we return the number of bytes left to be written in the
1154 * system,
1155 * Otherwise we return zero.
1156 *****************************************************************************/
1157
1158 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1159 {
1160 struct usb_serial_port *port = tty->driver_data;
1161 int i;
1162 int chars = 0;
1163 unsigned long flags;
1164 struct moschip_port *mos7840_port;
1165
1166 if (mos7840_port_paranoia_check(port, __func__))
1167 return 0;
1168
1169 mos7840_port = mos7840_get_port_private(port);
1170 if (mos7840_port == NULL)
1171 return 0;
1172
1173 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1174 for (i = 0; i < NUM_URBS; ++i) {
1175 if (mos7840_port->busy[i]) {
1176 struct urb *urb = mos7840_port->write_urb_pool[i];
1177 chars += urb->transfer_buffer_length;
1178 }
1179 }
1180 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1181 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1182 return chars;
1183
1184 }
1185
1186 /*****************************************************************************
1187 * mos7840_close
1188 * this function is called by the tty driver when a port is closed
1189 *****************************************************************************/
1190
1191 static void mos7840_close(struct usb_serial_port *port)
1192 {
1193 struct usb_serial *serial;
1194 struct moschip_port *mos7840_port;
1195 struct moschip_port *port0;
1196 int j;
1197 __u16 Data;
1198
1199 if (mos7840_port_paranoia_check(port, __func__))
1200 return;
1201
1202 serial = mos7840_get_usb_serial(port, __func__);
1203 if (!serial)
1204 return;
1205
1206 mos7840_port = mos7840_get_port_private(port);
1207 port0 = mos7840_get_port_private(serial->port[0]);
1208
1209 if (mos7840_port == NULL || port0 == NULL)
1210 return;
1211
1212 for (j = 0; j < NUM_URBS; ++j)
1213 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1214
1215 /* Freeing Write URBs */
1216 for (j = 0; j < NUM_URBS; ++j) {
1217 if (mos7840_port->write_urb_pool[j]) {
1218 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1219 kfree(mos7840_port->write_urb_pool[j]->
1220 transfer_buffer);
1221
1222 usb_free_urb(mos7840_port->write_urb_pool[j]);
1223 }
1224 }
1225
1226 usb_kill_urb(mos7840_port->write_urb);
1227 usb_kill_urb(mos7840_port->read_urb);
1228 mos7840_port->read_urb_busy = false;
1229
1230 port0->open_ports--;
1231 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
1232 if (port0->open_ports == 0) {
1233 if (serial->port[0]->interrupt_in_urb) {
1234 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1235 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1236 }
1237 }
1238
1239 if (mos7840_port->write_urb) {
1240 /* if this urb had a transfer buffer already (old tx) free it */
1241 kfree(mos7840_port->write_urb->transfer_buffer);
1242 usb_free_urb(mos7840_port->write_urb);
1243 }
1244
1245 Data = 0x0;
1246 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1247
1248 Data = 0x00;
1249 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1250
1251 mos7840_port->open = 0;
1252 }
1253
1254 /************************************************************************
1255 *
1256 * mos7840_block_until_chase_response
1257 *
1258 * This function will block the close until one of the following:
1259 * 1. Response to our Chase comes from mos7840
1260 * 2. A timeout of 10 seconds without activity has expired
1261 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1262 *
1263 ************************************************************************/
1264
1265 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1266 struct moschip_port *mos7840_port)
1267 {
1268 int timeout = msecs_to_jiffies(1000);
1269 int wait = 10;
1270 int count;
1271
1272 while (1) {
1273 count = mos7840_chars_in_buffer(tty);
1274
1275 /* Check for Buffer status */
1276 if (count <= 0)
1277 return;
1278
1279 /* Block the thread for a while */
1280 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1281 timeout);
1282 /* No activity.. count down section */
1283 wait--;
1284 if (wait == 0) {
1285 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
1286 return;
1287 } else {
1288 /* Reset timeout value back to seconds */
1289 wait = 10;
1290 }
1291 }
1292
1293 }
1294
1295 /*****************************************************************************
1296 * mos7840_break
1297 * this function sends a break to the port
1298 *****************************************************************************/
1299 static void mos7840_break(struct tty_struct *tty, int break_state)
1300 {
1301 struct usb_serial_port *port = tty->driver_data;
1302 unsigned char data;
1303 struct usb_serial *serial;
1304 struct moschip_port *mos7840_port;
1305
1306 if (mos7840_port_paranoia_check(port, __func__))
1307 return;
1308
1309 serial = mos7840_get_usb_serial(port, __func__);
1310 if (!serial)
1311 return;
1312
1313 mos7840_port = mos7840_get_port_private(port);
1314
1315 if (mos7840_port == NULL)
1316 return;
1317
1318 /* flush and block until tx is empty */
1319 mos7840_block_until_chase_response(tty, mos7840_port);
1320
1321 if (break_state == -1)
1322 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1323 else
1324 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1325
1326 /* FIXME: no locking on shadowLCR anywhere in driver */
1327 mos7840_port->shadowLCR = data;
1328 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1329 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1330 mos7840_port->shadowLCR);
1331 }
1332
1333 /*****************************************************************************
1334 * mos7840_write_room
1335 * this function is called by the tty driver when it wants to know how many
1336 * bytes of data we can accept for a specific port.
1337 * If successful, we return the amount of room that we have for this port
1338 * Otherwise we return a negative error number.
1339 *****************************************************************************/
1340
1341 static int mos7840_write_room(struct tty_struct *tty)
1342 {
1343 struct usb_serial_port *port = tty->driver_data;
1344 int i;
1345 int room = 0;
1346 unsigned long flags;
1347 struct moschip_port *mos7840_port;
1348
1349 if (mos7840_port_paranoia_check(port, __func__))
1350 return -1;
1351
1352 mos7840_port = mos7840_get_port_private(port);
1353 if (mos7840_port == NULL)
1354 return -1;
1355
1356 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1357 for (i = 0; i < NUM_URBS; ++i) {
1358 if (!mos7840_port->busy[i])
1359 room += URB_TRANSFER_BUFFER_SIZE;
1360 }
1361 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1362
1363 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1364 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1365 return room;
1366
1367 }
1368
1369 /*****************************************************************************
1370 * mos7840_write
1371 * this function is called by the tty driver when data should be written to
1372 * the port.
1373 * If successful, we return the number of bytes written, otherwise we
1374 * return a negative error number.
1375 *****************************************************************************/
1376
1377 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1378 const unsigned char *data, int count)
1379 {
1380 int status;
1381 int i;
1382 int bytes_sent = 0;
1383 int transfer_size;
1384 unsigned long flags;
1385
1386 struct moschip_port *mos7840_port;
1387 struct usb_serial *serial;
1388 struct urb *urb;
1389 /* __u16 Data; */
1390 const unsigned char *current_position = data;
1391 unsigned char *data1;
1392
1393 #ifdef NOTMOS7840
1394 Data = 0x00;
1395 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1396 mos7840_port->shadowLCR = Data;
1397 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1398 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1399
1400 /* Data = 0x03; */
1401 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1402 /* mos7840_port->shadowLCR=Data;//Need to add later */
1403
1404 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1405 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1406
1407 /* Data = 0x0c; */
1408 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1409 Data = 0x00;
1410 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1411 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1412
1413 Data = 0x0;
1414 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1415 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1416
1417 Data = Data & ~SERIAL_LCR_DLAB;
1418 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1419 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1420 #endif
1421
1422 if (mos7840_port_paranoia_check(port, __func__))
1423 return -1;
1424
1425 serial = port->serial;
1426 if (mos7840_serial_paranoia_check(serial, __func__))
1427 return -1;
1428
1429 mos7840_port = mos7840_get_port_private(port);
1430 if (mos7840_port == NULL)
1431 return -1;
1432
1433 /* try to find a free urb in the list */
1434 urb = NULL;
1435
1436 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1437 for (i = 0; i < NUM_URBS; ++i) {
1438 if (!mos7840_port->busy[i]) {
1439 mos7840_port->busy[i] = 1;
1440 urb = mos7840_port->write_urb_pool[i];
1441 dev_dbg(&port->dev, "URB:%d\n", i);
1442 break;
1443 }
1444 }
1445 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1446
1447 if (urb == NULL) {
1448 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1449 goto exit;
1450 }
1451
1452 if (urb->transfer_buffer == NULL) {
1453 urb->transfer_buffer =
1454 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1455
1456 if (urb->transfer_buffer == NULL) {
1457 dev_err_console(port, "%s no more kernel memory...\n",
1458 __func__);
1459 goto exit;
1460 }
1461 }
1462 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1463
1464 memcpy(urb->transfer_buffer, current_position, transfer_size);
1465
1466 /* fill urb with data and submit */
1467 if ((serial->num_ports == 2)
1468 && ((((__u16)port->number -
1469 (__u16)(port->serial->minor)) % 2) != 0)) {
1470 usb_fill_bulk_urb(urb,
1471 serial->dev,
1472 usb_sndbulkpipe(serial->dev,
1473 (port->bulk_out_endpointAddress) + 2),
1474 urb->transfer_buffer,
1475 transfer_size,
1476 mos7840_bulk_out_data_callback, mos7840_port);
1477 } else {
1478 usb_fill_bulk_urb(urb,
1479 serial->dev,
1480 usb_sndbulkpipe(serial->dev,
1481 port->bulk_out_endpointAddress),
1482 urb->transfer_buffer,
1483 transfer_size,
1484 mos7840_bulk_out_data_callback, mos7840_port);
1485 }
1486
1487 data1 = urb->transfer_buffer;
1488 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1489
1490 /* Turn on LED */
1491 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1492 mos7840_port->led_flag = true;
1493 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1494 mod_timer(&mos7840_port->led_timer1,
1495 jiffies + msecs_to_jiffies(LED_ON_MS));
1496 }
1497
1498 /* send it down the pipe */
1499 status = usb_submit_urb(urb, GFP_ATOMIC);
1500
1501 if (status) {
1502 mos7840_port->busy[i] = 0;
1503 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1504 "with status = %d\n", __func__, status);
1505 bytes_sent = status;
1506 goto exit;
1507 }
1508 bytes_sent = transfer_size;
1509 mos7840_port->icount.tx += transfer_size;
1510 smp_wmb();
1511 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1512 exit:
1513 return bytes_sent;
1514
1515 }
1516
1517 /*****************************************************************************
1518 * mos7840_throttle
1519 * this function is called by the tty driver when it wants to stop the data
1520 * being read from the port.
1521 *****************************************************************************/
1522
1523 static void mos7840_throttle(struct tty_struct *tty)
1524 {
1525 struct usb_serial_port *port = tty->driver_data;
1526 struct moschip_port *mos7840_port;
1527 int status;
1528
1529 if (mos7840_port_paranoia_check(port, __func__))
1530 return;
1531
1532 mos7840_port = mos7840_get_port_private(port);
1533
1534 if (mos7840_port == NULL)
1535 return;
1536
1537 if (!mos7840_port->open) {
1538 dev_dbg(&port->dev, "%s", "port not opened\n");
1539 return;
1540 }
1541
1542 /* if we are implementing XON/XOFF, send the stop character */
1543 if (I_IXOFF(tty)) {
1544 unsigned char stop_char = STOP_CHAR(tty);
1545 status = mos7840_write(tty, port, &stop_char, 1);
1546 if (status <= 0)
1547 return;
1548 }
1549 /* if we are implementing RTS/CTS, toggle that line */
1550 if (tty->termios.c_cflag & CRTSCTS) {
1551 mos7840_port->shadowMCR &= ~MCR_RTS;
1552 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1553 mos7840_port->shadowMCR);
1554 if (status < 0)
1555 return;
1556 }
1557 }
1558
1559 /*****************************************************************************
1560 * mos7840_unthrottle
1561 * this function is called by the tty driver when it wants to resume
1562 * the data being read from the port (called after mos7840_throttle is
1563 * called)
1564 *****************************************************************************/
1565 static void mos7840_unthrottle(struct tty_struct *tty)
1566 {
1567 struct usb_serial_port *port = tty->driver_data;
1568 int status;
1569 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1570
1571 if (mos7840_port_paranoia_check(port, __func__))
1572 return;
1573
1574 if (mos7840_port == NULL)
1575 return;
1576
1577 if (!mos7840_port->open) {
1578 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1579 return;
1580 }
1581
1582 /* if we are implementing XON/XOFF, send the start character */
1583 if (I_IXOFF(tty)) {
1584 unsigned char start_char = START_CHAR(tty);
1585 status = mos7840_write(tty, port, &start_char, 1);
1586 if (status <= 0)
1587 return;
1588 }
1589
1590 /* if we are implementing RTS/CTS, toggle that line */
1591 if (tty->termios.c_cflag & CRTSCTS) {
1592 mos7840_port->shadowMCR |= MCR_RTS;
1593 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1594 mos7840_port->shadowMCR);
1595 if (status < 0)
1596 return;
1597 }
1598 }
1599
1600 static int mos7840_tiocmget(struct tty_struct *tty)
1601 {
1602 struct usb_serial_port *port = tty->driver_data;
1603 struct moschip_port *mos7840_port;
1604 unsigned int result;
1605 __u16 msr;
1606 __u16 mcr;
1607 int status;
1608 mos7840_port = mos7840_get_port_private(port);
1609
1610 if (mos7840_port == NULL)
1611 return -ENODEV;
1612
1613 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1614 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1615 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1616 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1617 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1618 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1619 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1620 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1621 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1622
1623 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1624
1625 return result;
1626 }
1627
1628 static int mos7840_tiocmset(struct tty_struct *tty,
1629 unsigned int set, unsigned int clear)
1630 {
1631 struct usb_serial_port *port = tty->driver_data;
1632 struct moschip_port *mos7840_port;
1633 unsigned int mcr;
1634 int status;
1635
1636 mos7840_port = mos7840_get_port_private(port);
1637
1638 if (mos7840_port == NULL)
1639 return -ENODEV;
1640
1641 /* FIXME: What locks the port registers ? */
1642 mcr = mos7840_port->shadowMCR;
1643 if (clear & TIOCM_RTS)
1644 mcr &= ~MCR_RTS;
1645 if (clear & TIOCM_DTR)
1646 mcr &= ~MCR_DTR;
1647 if (clear & TIOCM_LOOP)
1648 mcr &= ~MCR_LOOPBACK;
1649
1650 if (set & TIOCM_RTS)
1651 mcr |= MCR_RTS;
1652 if (set & TIOCM_DTR)
1653 mcr |= MCR_DTR;
1654 if (set & TIOCM_LOOP)
1655 mcr |= MCR_LOOPBACK;
1656
1657 mos7840_port->shadowMCR = mcr;
1658
1659 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1660 if (status < 0) {
1661 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1662 return status;
1663 }
1664
1665 return 0;
1666 }
1667
1668 /*****************************************************************************
1669 * mos7840_calc_baud_rate_divisor
1670 * this function calculates the proper baud rate divisor for the specified
1671 * baud rate.
1672 *****************************************************************************/
1673 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1674 int baudRate, int *divisor,
1675 __u16 *clk_sel_val)
1676 {
1677 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1678
1679 if (baudRate <= 115200) {
1680 *divisor = 115200 / baudRate;
1681 *clk_sel_val = 0x0;
1682 }
1683 if ((baudRate > 115200) && (baudRate <= 230400)) {
1684 *divisor = 230400 / baudRate;
1685 *clk_sel_val = 0x10;
1686 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1687 *divisor = 403200 / baudRate;
1688 *clk_sel_val = 0x20;
1689 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1690 *divisor = 460800 / baudRate;
1691 *clk_sel_val = 0x30;
1692 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1693 *divisor = 806400 / baudRate;
1694 *clk_sel_val = 0x40;
1695 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1696 *divisor = 921600 / baudRate;
1697 *clk_sel_val = 0x50;
1698 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1699 *divisor = 1572864 / baudRate;
1700 *clk_sel_val = 0x60;
1701 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1702 *divisor = 3145728 / baudRate;
1703 *clk_sel_val = 0x70;
1704 }
1705 return 0;
1706
1707 #ifdef NOTMCS7840
1708
1709 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1710 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1711 *divisor = mos7840_divisor_table[i].Divisor;
1712 return 0;
1713 }
1714 }
1715
1716 /* After trying for all the standard baud rates *
1717 * Try calculating the divisor for this baud rate */
1718
1719 if (baudrate > 75 && baudrate < 230400) {
1720 /* get the divisor */
1721 custom = (__u16) (230400L / baudrate);
1722
1723 /* Check for round off */
1724 round1 = (__u16) (2304000L / baudrate);
1725 round = (__u16) (round1 - (custom * 10));
1726 if (round > 4)
1727 custom++;
1728 *divisor = custom;
1729
1730 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1731 return 0;
1732 }
1733
1734 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1735 return -1;
1736 #endif
1737 }
1738
1739 /*****************************************************************************
1740 * mos7840_send_cmd_write_baud_rate
1741 * this function sends the proper command to change the baud rate of the
1742 * specified port.
1743 *****************************************************************************/
1744
1745 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1746 int baudRate)
1747 {
1748 int divisor = 0;
1749 int status;
1750 __u16 Data;
1751 unsigned char number;
1752 __u16 clk_sel_val;
1753 struct usb_serial_port *port;
1754
1755 if (mos7840_port == NULL)
1756 return -1;
1757
1758 port = mos7840_port->port;
1759 if (mos7840_port_paranoia_check(port, __func__))
1760 return -1;
1761
1762 if (mos7840_serial_paranoia_check(port->serial, __func__))
1763 return -1;
1764
1765 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1766
1767 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1768 mos7840_port->port->number, baudRate);
1769 /* reset clk_uart_sel in spregOffset */
1770 if (baudRate > 115200) {
1771 #ifdef HW_flow_control
1772 /* NOTE: need to see the pther register to modify */
1773 /* setting h/w flow control bit to 1 */
1774 Data = 0x2b;
1775 mos7840_port->shadowMCR = Data;
1776 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1777 Data);
1778 if (status < 0) {
1779 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1780 return -1;
1781 }
1782 #endif
1783
1784 } else {
1785 #ifdef HW_flow_control
1786 /* setting h/w flow control bit to 0 */
1787 Data = 0xb;
1788 mos7840_port->shadowMCR = Data;
1789 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1790 Data);
1791 if (status < 0) {
1792 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1793 return -1;
1794 }
1795 #endif
1796
1797 }
1798
1799 if (1) { /* baudRate <= 115200) */
1800 clk_sel_val = 0x0;
1801 Data = 0x0;
1802 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1803 &clk_sel_val);
1804 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1805 &Data);
1806 if (status < 0) {
1807 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1808 return -1;
1809 }
1810 Data = (Data & 0x8f) | clk_sel_val;
1811 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1812 Data);
1813 if (status < 0) {
1814 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1815 return -1;
1816 }
1817 /* Calculate the Divisor */
1818
1819 if (status) {
1820 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1821 return status;
1822 }
1823 /* Enable access to divisor latch */
1824 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1825 mos7840_port->shadowLCR = Data;
1826 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1827
1828 /* Write the divisor */
1829 Data = (unsigned char)(divisor & 0xff);
1830 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1831 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1832
1833 Data = (unsigned char)((divisor & 0xff00) >> 8);
1834 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1835 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1836
1837 /* Disable access to divisor latch */
1838 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1839 mos7840_port->shadowLCR = Data;
1840 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1841
1842 }
1843 return status;
1844 }
1845
1846 /*****************************************************************************
1847 * mos7840_change_port_settings
1848 * This routine is called to set the UART on the device to match
1849 * the specified new settings.
1850 *****************************************************************************/
1851
1852 static void mos7840_change_port_settings(struct tty_struct *tty,
1853 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1854 {
1855 int baud;
1856 unsigned cflag;
1857 unsigned iflag;
1858 __u8 lData;
1859 __u8 lParity;
1860 __u8 lStop;
1861 int status;
1862 __u16 Data;
1863 struct usb_serial_port *port;
1864 struct usb_serial *serial;
1865
1866 if (mos7840_port == NULL)
1867 return;
1868
1869 port = mos7840_port->port;
1870
1871 if (mos7840_port_paranoia_check(port, __func__))
1872 return;
1873
1874 if (mos7840_serial_paranoia_check(port->serial, __func__))
1875 return;
1876
1877 serial = port->serial;
1878
1879 if (!mos7840_port->open) {
1880 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1881 return;
1882 }
1883
1884 lData = LCR_BITS_8;
1885 lStop = LCR_STOP_1;
1886 lParity = LCR_PAR_NONE;
1887
1888 cflag = tty->termios.c_cflag;
1889 iflag = tty->termios.c_iflag;
1890
1891 /* Change the number of bits */
1892 if (cflag & CSIZE) {
1893 switch (cflag & CSIZE) {
1894 case CS5:
1895 lData = LCR_BITS_5;
1896 break;
1897
1898 case CS6:
1899 lData = LCR_BITS_6;
1900 break;
1901
1902 case CS7:
1903 lData = LCR_BITS_7;
1904 break;
1905 default:
1906 case CS8:
1907 lData = LCR_BITS_8;
1908 break;
1909 }
1910 }
1911 /* Change the Parity bit */
1912 if (cflag & PARENB) {
1913 if (cflag & PARODD) {
1914 lParity = LCR_PAR_ODD;
1915 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1916 } else {
1917 lParity = LCR_PAR_EVEN;
1918 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1919 }
1920
1921 } else {
1922 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1923 }
1924
1925 if (cflag & CMSPAR)
1926 lParity = lParity | 0x20;
1927
1928 /* Change the Stop bit */
1929 if (cflag & CSTOPB) {
1930 lStop = LCR_STOP_2;
1931 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1932 } else {
1933 lStop = LCR_STOP_1;
1934 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1935 }
1936
1937 /* Update the LCR with the correct value */
1938 mos7840_port->shadowLCR &=
1939 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1940 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1941
1942 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1943 mos7840_port->shadowLCR);
1944 /* Disable Interrupts */
1945 Data = 0x00;
1946 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1947
1948 Data = 0x00;
1949 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1950
1951 Data = 0xcf;
1952 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1953
1954 /* Send the updated LCR value to the mos7840 */
1955 Data = mos7840_port->shadowLCR;
1956
1957 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1958
1959 Data = 0x00b;
1960 mos7840_port->shadowMCR = Data;
1961 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1962 Data = 0x00b;
1963 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1964
1965 /* set up the MCR register and send it to the mos7840 */
1966
1967 mos7840_port->shadowMCR = MCR_MASTER_IE;
1968 if (cflag & CBAUD)
1969 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1970
1971 if (cflag & CRTSCTS)
1972 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1973 else
1974 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1975
1976 Data = mos7840_port->shadowMCR;
1977 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1978
1979 /* Determine divisor based on baud rate */
1980 baud = tty_get_baud_rate(tty);
1981
1982 if (!baud) {
1983 /* pick a default, any default... */
1984 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1985 baud = 9600;
1986 }
1987
1988 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1989 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1990
1991 /* Enable Interrupts */
1992 Data = 0x0c;
1993 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1994
1995 if (mos7840_port->read_urb_busy == false) {
1996 mos7840_port->read_urb_busy = true;
1997 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1998 if (status) {
1999 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2000 status);
2001 mos7840_port->read_urb_busy = false;
2002 }
2003 }
2004 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2005 mos7840_port->shadowLCR);
2006 }
2007
2008 /*****************************************************************************
2009 * mos7840_set_termios
2010 * this function is called by the tty driver when it wants to change
2011 * the termios structure
2012 *****************************************************************************/
2013
2014 static void mos7840_set_termios(struct tty_struct *tty,
2015 struct usb_serial_port *port,
2016 struct ktermios *old_termios)
2017 {
2018 int status;
2019 unsigned int cflag;
2020 struct usb_serial *serial;
2021 struct moschip_port *mos7840_port;
2022
2023 if (mos7840_port_paranoia_check(port, __func__))
2024 return;
2025
2026 serial = port->serial;
2027
2028 if (mos7840_serial_paranoia_check(serial, __func__))
2029 return;
2030
2031 mos7840_port = mos7840_get_port_private(port);
2032
2033 if (mos7840_port == NULL)
2034 return;
2035
2036 if (!mos7840_port->open) {
2037 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
2038 return;
2039 }
2040
2041 dev_dbg(&port->dev, "%s", "setting termios - \n");
2042
2043 cflag = tty->termios.c_cflag;
2044
2045 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2046 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
2047 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2048 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2049 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
2050
2051 /* change the port settings to the new ones specified */
2052
2053 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2054
2055 if (!mos7840_port->read_urb) {
2056 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
2057 return;
2058 }
2059
2060 if (mos7840_port->read_urb_busy == false) {
2061 mos7840_port->read_urb_busy = true;
2062 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2063 if (status) {
2064 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2065 status);
2066 mos7840_port->read_urb_busy = false;
2067 }
2068 }
2069 }
2070
2071 /*****************************************************************************
2072 * mos7840_get_lsr_info - get line status register info
2073 *
2074 * Purpose: Let user call ioctl() to get info when the UART physically
2075 * is emptied. On bus types like RS485, the transmitter must
2076 * release the bus after transmitting. This must be done when
2077 * the transmit shift register is empty, not be done when the
2078 * transmit holding register is empty. This functionality
2079 * allows an RS485 driver to be written in user space.
2080 *****************************************************************************/
2081
2082 static int mos7840_get_lsr_info(struct tty_struct *tty,
2083 unsigned int __user *value)
2084 {
2085 int count;
2086 unsigned int result = 0;
2087
2088 count = mos7840_chars_in_buffer(tty);
2089 if (count == 0)
2090 result = TIOCSER_TEMT;
2091
2092 if (copy_to_user(value, &result, sizeof(int)))
2093 return -EFAULT;
2094 return 0;
2095 }
2096
2097 /*****************************************************************************
2098 * mos7840_get_serial_info
2099 * function to get information about serial port
2100 *****************************************************************************/
2101
2102 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2103 struct serial_struct __user *retinfo)
2104 {
2105 struct serial_struct tmp;
2106
2107 if (mos7840_port == NULL)
2108 return -1;
2109
2110 if (!retinfo)
2111 return -EFAULT;
2112
2113 memset(&tmp, 0, sizeof(tmp));
2114
2115 tmp.type = PORT_16550A;
2116 tmp.line = mos7840_port->port->serial->minor;
2117 tmp.port = mos7840_port->port->number;
2118 tmp.irq = 0;
2119 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2120 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2121 tmp.baud_base = 9600;
2122 tmp.close_delay = 5 * HZ;
2123 tmp.closing_wait = 30 * HZ;
2124
2125 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2126 return -EFAULT;
2127 return 0;
2128 }
2129
2130 static int mos7840_get_icount(struct tty_struct *tty,
2131 struct serial_icounter_struct *icount)
2132 {
2133 struct usb_serial_port *port = tty->driver_data;
2134 struct moschip_port *mos7840_port;
2135 struct async_icount cnow;
2136
2137 mos7840_port = mos7840_get_port_private(port);
2138 cnow = mos7840_port->icount;
2139
2140 smp_rmb();
2141 icount->cts = cnow.cts;
2142 icount->dsr = cnow.dsr;
2143 icount->rng = cnow.rng;
2144 icount->dcd = cnow.dcd;
2145 icount->rx = cnow.rx;
2146 icount->tx = cnow.tx;
2147 icount->frame = cnow.frame;
2148 icount->overrun = cnow.overrun;
2149 icount->parity = cnow.parity;
2150 icount->brk = cnow.brk;
2151 icount->buf_overrun = cnow.buf_overrun;
2152
2153 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2154 icount->rx, icount->tx);
2155 return 0;
2156 }
2157
2158 /*****************************************************************************
2159 * SerialIoctl
2160 * this function handles any ioctl calls to the driver
2161 *****************************************************************************/
2162
2163 static int mos7840_ioctl(struct tty_struct *tty,
2164 unsigned int cmd, unsigned long arg)
2165 {
2166 struct usb_serial_port *port = tty->driver_data;
2167 void __user *argp = (void __user *)arg;
2168 struct moschip_port *mos7840_port;
2169
2170 struct async_icount cnow;
2171 struct async_icount cprev;
2172
2173 if (mos7840_port_paranoia_check(port, __func__))
2174 return -1;
2175
2176 mos7840_port = mos7840_get_port_private(port);
2177
2178 if (mos7840_port == NULL)
2179 return -1;
2180
2181 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
2182
2183 switch (cmd) {
2184 /* return number of bytes available */
2185
2186 case TIOCSERGETLSR:
2187 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2188 return mos7840_get_lsr_info(tty, argp);
2189
2190 case TIOCGSERIAL:
2191 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2192 return mos7840_get_serial_info(mos7840_port, argp);
2193
2194 case TIOCSSERIAL:
2195 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2196 break;
2197
2198 case TIOCMIWAIT:
2199 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
2200 cprev = mos7840_port->icount;
2201 while (1) {
2202 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2203 mos7840_port->delta_msr_cond = 0;
2204 wait_event_interruptible(port->delta_msr_wait,
2205 (port->serial->disconnected ||
2206 mos7840_port->
2207 delta_msr_cond == 1));
2208
2209 /* see if a signal did it */
2210 if (signal_pending(current))
2211 return -ERESTARTSYS;
2212
2213 if (port->serial->disconnected)
2214 return -EIO;
2215
2216 cnow = mos7840_port->icount;
2217 smp_rmb();
2218 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2219 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2220 return -EIO; /* no change => error */
2221 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2222 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2223 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2224 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2225 return 0;
2226 }
2227 cprev = cnow;
2228 }
2229 /* NOTREACHED */
2230 break;
2231
2232 default:
2233 break;
2234 }
2235 return -ENOIOCTLCMD;
2236 }
2237
2238 static int mos7810_check(struct usb_serial *serial)
2239 {
2240 int i, pass_count = 0;
2241 __u16 data = 0, mcr_data = 0;
2242 __u16 test_pattern = 0x55AA;
2243
2244 /* Store MCR setting */
2245 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2246 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2247 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2248
2249 for (i = 0; i < 16; i++) {
2250 /* Send the 1-bit test pattern out to MCS7810 test pin */
2251 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2252 MCS_WRREQ, MCS_WR_RTYPE,
2253 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2254 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2255
2256 /* Read the test pattern back */
2257 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2258 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2259 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2260
2261 /* If this is a MCS7810 device, both test patterns must match */
2262 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2263 break;
2264
2265 pass_count++;
2266 }
2267
2268 /* Restore MCR setting */
2269 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2270 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2271 0, MOS_WDR_TIMEOUT);
2272
2273 if (pass_count == 16)
2274 return 1;
2275
2276 return 0;
2277 }
2278
2279 static int mos7840_calc_num_ports(struct usb_serial *serial)
2280 {
2281 __u16 data = 0x00;
2282 int mos7840_num_ports;
2283
2284 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2285 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2286 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2287
2288 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2289 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2290 device_type = serial->dev->descriptor.idProduct;
2291 } else {
2292 /* For a MCS7840 device GPIO0 must be set to 1 */
2293 if ((data & 0x01) == 1)
2294 device_type = MOSCHIP_DEVICE_ID_7840;
2295 else if (mos7810_check(serial))
2296 device_type = MOSCHIP_DEVICE_ID_7810;
2297 else
2298 device_type = MOSCHIP_DEVICE_ID_7820;
2299 }
2300
2301 mos7840_num_ports = (device_type >> 4) & 0x000F;
2302 serial->num_bulk_in = mos7840_num_ports;
2303 serial->num_bulk_out = mos7840_num_ports;
2304 serial->num_ports = mos7840_num_ports;
2305
2306 return mos7840_num_ports;
2307 }
2308
2309 static int mos7840_port_probe(struct usb_serial_port *port)
2310 {
2311 struct usb_serial *serial = port->serial;
2312 struct moschip_port *mos7840_port;
2313 int status;
2314 int pnum;
2315 __u16 Data;
2316
2317 /* we set up the pointers to the endpoints in the mos7840_open *
2318 * function, as the structures aren't created yet. */
2319
2320 pnum = port->number - serial->minor;
2321
2322 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2323 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2324 if (mos7840_port == NULL) {
2325 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2326 return -ENOMEM;
2327 }
2328
2329 /* Initialize all port interrupt end point to port 0 int
2330 * endpoint. Our device has only one interrupt end point
2331 * common to all port */
2332
2333 mos7840_port->port = port;
2334 mos7840_set_port_private(port, mos7840_port);
2335 spin_lock_init(&mos7840_port->pool_lock);
2336
2337 /* minor is not initialised until later by
2338 * usb-serial.c:get_free_serial() and cannot therefore be used
2339 * to index device instances */
2340 mos7840_port->port_num = pnum + 1;
2341 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2342 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2343 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2344 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2345
2346 if (mos7840_port->port_num == 1) {
2347 mos7840_port->SpRegOffset = 0x0;
2348 mos7840_port->ControlRegOffset = 0x1;
2349 mos7840_port->DcrRegOffset = 0x4;
2350 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2351 mos7840_port->SpRegOffset = 0x8;
2352 mos7840_port->ControlRegOffset = 0x9;
2353 mos7840_port->DcrRegOffset = 0x16;
2354 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2355 mos7840_port->SpRegOffset = 0xa;
2356 mos7840_port->ControlRegOffset = 0xb;
2357 mos7840_port->DcrRegOffset = 0x19;
2358 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2359 mos7840_port->SpRegOffset = 0xa;
2360 mos7840_port->ControlRegOffset = 0xb;
2361 mos7840_port->DcrRegOffset = 0x19;
2362 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2363 mos7840_port->SpRegOffset = 0xc;
2364 mos7840_port->ControlRegOffset = 0xd;
2365 mos7840_port->DcrRegOffset = 0x1c;
2366 }
2367 mos7840_dump_serial_port(port, mos7840_port);
2368 mos7840_set_port_private(port, mos7840_port);
2369
2370 /* enable rx_disable bit in control register */
2371 status = mos7840_get_reg_sync(port,
2372 mos7840_port->ControlRegOffset, &Data);
2373 if (status < 0) {
2374 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2375 goto out;
2376 } else
2377 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2378 Data |= 0x08; /* setting driver done bit */
2379 Data |= 0x04; /* sp1_bit to have cts change reflect in
2380 modem status reg */
2381
2382 /* Data |= 0x20; //rx_disable bit */
2383 status = mos7840_set_reg_sync(port,
2384 mos7840_port->ControlRegOffset, Data);
2385 if (status < 0) {
2386 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2387 goto out;
2388 } else
2389 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2390
2391 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2392 and 0x24 in DCR3 */
2393 Data = 0x01;
2394 status = mos7840_set_reg_sync(port,
2395 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2396 if (status < 0) {
2397 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2398 goto out;
2399 } else
2400 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2401
2402 Data = 0x05;
2403 status = mos7840_set_reg_sync(port,
2404 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2405 if (status < 0) {
2406 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2407 goto out;
2408 } else
2409 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2410
2411 Data = 0x24;
2412 status = mos7840_set_reg_sync(port,
2413 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2414 if (status < 0) {
2415 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2416 goto out;
2417 } else
2418 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2419
2420 /* write values in clkstart0x0 and clkmulti 0x20 */
2421 Data = 0x0;
2422 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2423 if (status < 0) {
2424 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2425 goto out;
2426 } else
2427 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2428
2429 Data = 0x20;
2430 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2431 if (status < 0) {
2432 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2433 goto error;
2434 } else
2435 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2436
2437 /* write value 0x0 to scratchpad register */
2438 Data = 0x00;
2439 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2440 if (status < 0) {
2441 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2442 goto out;
2443 } else
2444 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2445
2446 /* Zero Length flag register */
2447 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2448 Data = 0xff;
2449 status = mos7840_set_reg_sync(port,
2450 (__u16) (ZLP_REG1 +
2451 ((__u16)mos7840_port->port_num)), Data);
2452 dev_dbg(&port->dev, "ZLIP offset %x\n",
2453 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2454 if (status < 0) {
2455 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2456 goto out;
2457 } else
2458 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2459 } else {
2460 Data = 0xff;
2461 status = mos7840_set_reg_sync(port,
2462 (__u16) (ZLP_REG1 +
2463 ((__u16)mos7840_port->port_num) - 0x1), Data);
2464 dev_dbg(&port->dev, "ZLIP offset %x\n",
2465 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2466 if (status < 0) {
2467 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2468 goto out;
2469 } else
2470 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2471
2472 }
2473 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2474 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2475 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2476 GFP_KERNEL);
2477 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2478 !mos7840_port->dr) {
2479 status = -ENOMEM;
2480 goto error;
2481 }
2482
2483 mos7840_port->has_led = false;
2484
2485 /* Initialize LED timers */
2486 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2487 mos7840_port->has_led = true;
2488
2489 init_timer(&mos7840_port->led_timer1);
2490 mos7840_port->led_timer1.function = mos7840_led_off;
2491 mos7840_port->led_timer1.expires =
2492 jiffies + msecs_to_jiffies(LED_ON_MS);
2493 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2494
2495 init_timer(&mos7840_port->led_timer2);
2496 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2497 mos7840_port->led_timer2.expires =
2498 jiffies + msecs_to_jiffies(LED_OFF_MS);
2499 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2500
2501 mos7840_port->led_flag = false;
2502
2503 /* Turn off LED */
2504 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2505 }
2506 out:
2507 if (pnum == serial->num_ports - 1) {
2508 /* Zero Length flag enable */
2509 Data = 0x0f;
2510 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2511 if (status < 0) {
2512 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2513 goto error;
2514 } else
2515 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2516
2517 /* setting configuration feature to one */
2518 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2519 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2520 MOS_WDR_TIMEOUT);
2521 }
2522 return 0;
2523 error:
2524 kfree(mos7840_port->dr);
2525 kfree(mos7840_port->ctrl_buf);
2526 usb_free_urb(mos7840_port->control_urb);
2527 kfree(mos7840_port);
2528
2529 return status;
2530 }
2531
2532 static int mos7840_port_remove(struct usb_serial_port *port)
2533 {
2534 struct moschip_port *mos7840_port;
2535
2536 mos7840_port = mos7840_get_port_private(port);
2537
2538 if (mos7840_port->has_led) {
2539 /* Turn off LED */
2540 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2541
2542 del_timer_sync(&mos7840_port->led_timer1);
2543 del_timer_sync(&mos7840_port->led_timer2);
2544 }
2545 usb_kill_urb(mos7840_port->control_urb);
2546 usb_free_urb(mos7840_port->control_urb);
2547 kfree(mos7840_port->ctrl_buf);
2548 kfree(mos7840_port->dr);
2549 kfree(mos7840_port);
2550
2551 return 0;
2552 }
2553
2554 static struct usb_serial_driver moschip7840_4port_device = {
2555 .driver = {
2556 .owner = THIS_MODULE,
2557 .name = "mos7840",
2558 },
2559 .description = DRIVER_DESC,
2560 .id_table = id_table,
2561 .num_ports = 4,
2562 .open = mos7840_open,
2563 .close = mos7840_close,
2564 .write = mos7840_write,
2565 .write_room = mos7840_write_room,
2566 .chars_in_buffer = mos7840_chars_in_buffer,
2567 .throttle = mos7840_throttle,
2568 .unthrottle = mos7840_unthrottle,
2569 .calc_num_ports = mos7840_calc_num_ports,
2570 #ifdef MCSSerialProbe
2571 .probe = mos7840_serial_probe,
2572 #endif
2573 .ioctl = mos7840_ioctl,
2574 .set_termios = mos7840_set_termios,
2575 .break_ctl = mos7840_break,
2576 .tiocmget = mos7840_tiocmget,
2577 .tiocmset = mos7840_tiocmset,
2578 .get_icount = mos7840_get_icount,
2579 .port_probe = mos7840_port_probe,
2580 .port_remove = mos7840_port_remove,
2581 .read_bulk_callback = mos7840_bulk_in_callback,
2582 .read_int_callback = mos7840_interrupt_callback,
2583 };
2584
2585 static struct usb_serial_driver * const serial_drivers[] = {
2586 &moschip7840_4port_device, NULL
2587 };
2588
2589 module_usb_serial_driver(serial_drivers, id_table);
2590
2591 MODULE_DESCRIPTION(DRIVER_DESC);
2592 MODULE_LICENSE("GPL");
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