?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Adding support for MOXA ART SoC. Testing port of linux-2.6.32.60-moxart.
[linux-3.6.7-moxart.git] / drivers / usb / serial / mos7840.c
blob5311819170d96f93b8a2d9fbf5ec4b96eb328f04
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 /*
39 * Version Information
40 */
41 #define DRIVER_VERSION "1.3.2"
42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
43
44 /*
45 * 16C50 UART register defines
46 */
47
48 #define LCR_BITS_5 0x00 /* 5 bits/char */
49 #define LCR_BITS_6 0x01 /* 6 bits/char */
50 #define LCR_BITS_7 0x02 /* 7 bits/char */
51 #define LCR_BITS_8 0x03 /* 8 bits/char */
52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
53
54 #define LCR_STOP_1 0x00 /* 1 stop bit */
55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
58
59 #define LCR_PAR_NONE 0x00 /* No parity */
60 #define LCR_PAR_ODD 0x08 /* Odd parity */
61 #define LCR_PAR_EVEN 0x18 /* Even parity */
62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
65
66 #define LCR_SET_BREAK 0x40 /* Set Break condition */
67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
68
69 #define MCR_DTR 0x01 /* Assert DTR */
70 #define MCR_RTS 0x02 /* Assert RTS */
71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
75
76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
80
81 /*
82 * Defines used for sending commands to port
83 */
84
85 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
86
87 #define MOS_PORT1 0x0200
88 #define MOS_PORT2 0x0300
89 #define MOS_VENREG 0x0000
90 #define MOS_MAX_PORT 0x02
91 #define MOS_WRITE 0x0E
92 #define MOS_READ 0x0D
93
94 /* Requests */
95 #define MCS_RD_RTYPE 0xC0
96 #define MCS_WR_RTYPE 0x40
97 #define MCS_RDREQ 0x0D
98 #define MCS_WRREQ 0x0E
99 #define MCS_CTRL_TIMEOUT 500
100 #define VENDOR_READ_LENGTH (0x01)
101
102 #define MAX_NAME_LEN 64
103
104 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
105 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
106
107 /* For higher baud Rates use TIOCEXBAUD */
108 #define TIOCEXBAUD 0x5462
109
110 /* vendor id and device id defines */
111
112 /* The native mos7840/7820 component */
113 #define USB_VENDOR_ID_MOSCHIP 0x9710
114 #define MOSCHIP_DEVICE_ID_7840 0x7840
115 #define MOSCHIP_DEVICE_ID_7820 0x7820
116 #define MOSCHIP_DEVICE_ID_7810 0x7810
117 /* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in id_table.
120 */
121 #define USB_VENDOR_ID_BANDB 0x0856
122 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
123 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
124 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
125 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
126 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
127 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
128 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
129 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
130 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
131 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
132 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
133 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
134 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
135
136 /* This driver also supports
137 * ATEN UC2324 device using Moschip MCS7840
138 * ATEN UC2322 device using Moschip MCS7820
139 */
140 #define USB_VENDOR_ID_ATENINTL 0x0557
141 #define ATENINTL_DEVICE_ID_UC2324 0x2011
142 #define ATENINTL_DEVICE_ID_UC2322 0x7820
143
144 /* Interrupt Routine Defines */
145
146 #define SERIAL_IIR_RLS 0x06
147 #define SERIAL_IIR_MS 0x00
148
149 /*
150 * Emulation of the bit mask on the LINE STATUS REGISTER.
151 */
152 #define SERIAL_LSR_DR 0x0001
153 #define SERIAL_LSR_OE 0x0002
154 #define SERIAL_LSR_PE 0x0004
155 #define SERIAL_LSR_FE 0x0008
156 #define SERIAL_LSR_BI 0x0010
157
158 #define MOS_MSR_DELTA_CTS 0x10
159 #define MOS_MSR_DELTA_DSR 0x20
160 #define MOS_MSR_DELTA_RI 0x40
161 #define MOS_MSR_DELTA_CD 0x80
162
163 /* Serial Port register Address */
164 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
165 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
166 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
167 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
168 #define LINE_STATUS_REGISTER ((__u16)(0x05))
169 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
170 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
171 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
172 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
173
174 #define CLK_MULTI_REGISTER ((__u16)(0x02))
175 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
176 #define GPIO_REGISTER ((__u16)(0x07))
177
178 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
179
180 /*
181 * URB POOL related defines
182 */
183 #define NUM_URBS 16 /* URB Count */
184 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
185
186 /* LED on/off milliseconds*/
187 #define LED_ON_MS 500
188 #define LED_OFF_MS 500
189
190 static int device_type;
191
192 static const struct usb_device_id id_table[] = {
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
195 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
211 {} /* terminating entry */
212 };
213 MODULE_DEVICE_TABLE(usb, id_table);
214
215 /* This structure holds all of the local port information */
216
217 struct moschip_port {
218 int port_num; /*Actual port number in the device(1,2,etc) */
219 struct urb *write_urb; /* write URB for this port */
220 struct urb *read_urb; /* read URB for this port */
221 __u8 shadowLCR; /* last LCR value received */
222 __u8 shadowMCR; /* last MCR value received */
223 char open;
224 char open_ports;
225 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
226 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
227 int delta_msr_cond;
228 struct async_icount icount;
229 struct usb_serial_port *port; /* loop back to the owner of this object */
230
231 /* Offsets */
232 __u8 SpRegOffset;
233 __u8 ControlRegOffset;
234 __u8 DcrRegOffset;
235 /* for processing control URBS in interrupt context */
236 struct urb *control_urb;
237 struct usb_ctrlrequest *dr;
238 char *ctrl_buf;
239 int MsrLsr;
240
241 spinlock_t pool_lock;
242 struct urb *write_urb_pool[NUM_URBS];
243 char busy[NUM_URBS];
244 bool read_urb_busy;
245
246 /* For device(s) with LED indicator */
247 bool has_led;
248 bool led_flag;
249 struct timer_list led_timer1; /* Timer for LED on */
250 struct timer_list led_timer2; /* Timer for LED off */
251 };
252
253 static bool debug;
254
255 /*
256 * mos7840_set_reg_sync
257 * To set the Control register by calling usb_fill_control_urb function
258 * by passing usb_sndctrlpipe function as parameter.
259 */
260
261 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
262 __u16 val)
263 {
264 struct usb_device *dev = port->serial->dev;
265 val = val & 0x00ff;
266 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
267
268 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
269 MCS_WR_RTYPE, val, reg, NULL, 0,
270 MOS_WDR_TIMEOUT);
271 }
272
273 /*
274 * mos7840_get_reg_sync
275 * To set the Uart register by calling usb_fill_control_urb function by
276 * passing usb_rcvctrlpipe function as parameter.
277 */
278
279 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
280 __u16 *val)
281 {
282 struct usb_device *dev = port->serial->dev;
283 int ret = 0;
284 u8 *buf;
285
286 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
287 if (!buf)
288 return -ENOMEM;
289
290 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
291 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
292 MOS_WDR_TIMEOUT);
293 *val = buf[0];
294 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
295
296 kfree(buf);
297 return ret;
298 }
299
300 /*
301 * mos7840_set_uart_reg
302 * To set the Uart register by calling usb_fill_control_urb function by
303 * passing usb_sndctrlpipe function as parameter.
304 */
305
306 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
307 __u16 val)
308 {
309
310 struct usb_device *dev = port->serial->dev;
311 val = val & 0x00ff;
312 /* For the UART control registers, the application number need
313 to be Or'ed */
314 if (port->serial->num_ports == 4) {
315 val |= (((__u16) port->number -
316 (__u16) (port->serial->minor)) + 1) << 8;
317 dbg("mos7840_set_uart_reg application number is %x", val);
318 } else {
319 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
320 val |= (((__u16) port->number -
321 (__u16) (port->serial->minor)) + 1) << 8;
322 dbg("mos7840_set_uart_reg application number is %x",
323 val);
324 } else {
325 val |=
326 (((__u16) port->number -
327 (__u16) (port->serial->minor)) + 2) << 8;
328 dbg("mos7840_set_uart_reg application number is %x",
329 val);
330 }
331 }
332 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
333 MCS_WR_RTYPE, val, reg, NULL, 0,
334 MOS_WDR_TIMEOUT);
335
336 }
337
338 /*
339 * mos7840_get_uart_reg
340 * To set the Control register by calling usb_fill_control_urb function
341 * by passing usb_rcvctrlpipe function as parameter.
342 */
343 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
344 __u16 *val)
345 {
346 struct usb_device *dev = port->serial->dev;
347 int ret = 0;
348 __u16 Wval;
349 u8 *buf;
350
351 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
352 if (!buf)
353 return -ENOMEM;
354
355 /* dbg("application number is %4x",
356 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
357 /* Wval is same as application number */
358 if (port->serial->num_ports == 4) {
359 Wval =
360 (((__u16) port->number - (__u16) (port->serial->minor)) +
361 1) << 8;
362 dbg("mos7840_get_uart_reg application number is %x", Wval);
363 } else {
364 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
365 Wval = (((__u16) port->number -
366 (__u16) (port->serial->minor)) + 1) << 8;
367 dbg("mos7840_get_uart_reg application number is %x",
368 Wval);
369 } else {
370 Wval = (((__u16) port->number -
371 (__u16) (port->serial->minor)) + 2) << 8;
372 dbg("mos7840_get_uart_reg application number is %x",
373 Wval);
374 }
375 }
376 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
377 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
378 MOS_WDR_TIMEOUT);
379 *val = buf[0];
380
381 kfree(buf);
382 return ret;
383 }
384
385 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
386 {
387
388 dbg("***************************************");
389 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
390 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
391 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
392 dbg("***************************************");
393
394 }
395
396 /************************************************************************/
397 /************************************************************************/
398 /* I N T E R F A C E F U N C T I O N S */
399 /* I N T E R F A C E F U N C T I O N S */
400 /************************************************************************/
401 /************************************************************************/
402
403 static inline void mos7840_set_port_private(struct usb_serial_port *port,
404 struct moschip_port *data)
405 {
406 usb_set_serial_port_data(port, (void *)data);
407 }
408
409 static inline struct moschip_port *mos7840_get_port_private(struct
410 usb_serial_port
411 *port)
412 {
413 return (struct moschip_port *)usb_get_serial_port_data(port);
414 }
415
416 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
417 {
418 struct moschip_port *mos7840_port;
419 struct async_icount *icount;
420 mos7840_port = port;
421 icount = &mos7840_port->icount;
422 if (new_msr &
423 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
424 MOS_MSR_DELTA_CD)) {
425 icount = &mos7840_port->icount;
426
427 /* update input line counters */
428 if (new_msr & MOS_MSR_DELTA_CTS) {
429 icount->cts++;
430 smp_wmb();
431 }
432 if (new_msr & MOS_MSR_DELTA_DSR) {
433 icount->dsr++;
434 smp_wmb();
435 }
436 if (new_msr & MOS_MSR_DELTA_CD) {
437 icount->dcd++;
438 smp_wmb();
439 }
440 if (new_msr & MOS_MSR_DELTA_RI) {
441 icount->rng++;
442 smp_wmb();
443 }
444 }
445 }
446
447 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
448 {
449 struct async_icount *icount;
450
451 dbg("%s - %02x", __func__, new_lsr);
452
453 if (new_lsr & SERIAL_LSR_BI) {
454 /*
455 * Parity and Framing errors only count if they
456 * occur exclusive of a break being
457 * received.
458 */
459 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
460 }
461
462 /* update input line counters */
463 icount = &port->icount;
464 if (new_lsr & SERIAL_LSR_BI) {
465 icount->brk++;
466 smp_wmb();
467 }
468 if (new_lsr & SERIAL_LSR_OE) {
469 icount->overrun++;
470 smp_wmb();
471 }
472 if (new_lsr & SERIAL_LSR_PE) {
473 icount->parity++;
474 smp_wmb();
475 }
476 if (new_lsr & SERIAL_LSR_FE) {
477 icount->frame++;
478 smp_wmb();
479 }
480 }
481
482 /************************************************************************/
483 /************************************************************************/
484 /* U S B C A L L B A C K F U N C T I O N S */
485 /* U S B C A L L B A C K F U N C T I O N S */
486 /************************************************************************/
487 /************************************************************************/
488
489 static void mos7840_control_callback(struct urb *urb)
490 {
491 unsigned char *data;
492 struct moschip_port *mos7840_port;
493 __u8 regval = 0x0;
494 int status = urb->status;
495
496 mos7840_port = urb->context;
497
498 switch (status) {
499 case 0:
500 /* success */
501 break;
502 case -ECONNRESET:
503 case -ENOENT:
504 case -ESHUTDOWN:
505 /* this urb is terminated, clean up */
506 dbg("%s - urb shutting down with status: %d", __func__,
507 status);
508 return;
509 default:
510 dbg("%s - nonzero urb status received: %d", __func__,
511 status);
512 return;
513 }
514
515 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
516 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
517 mos7840_port->MsrLsr, mos7840_port->port_num);
518 data = urb->transfer_buffer;
519 regval = (__u8) data[0];
520 dbg("%s data is %x", __func__, regval);
521 if (mos7840_port->MsrLsr == 0)
522 mos7840_handle_new_msr(mos7840_port, regval);
523 else if (mos7840_port->MsrLsr == 1)
524 mos7840_handle_new_lsr(mos7840_port, regval);
525 }
526
527 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
528 __u16 *val)
529 {
530 struct usb_device *dev = mcs->port->serial->dev;
531 struct usb_ctrlrequest *dr = mcs->dr;
532 unsigned char *buffer = mcs->ctrl_buf;
533 int ret;
534
535 dr->bRequestType = MCS_RD_RTYPE;
536 dr->bRequest = MCS_RDREQ;
537 dr->wValue = cpu_to_le16(Wval); /* 0 */
538 dr->wIndex = cpu_to_le16(reg);
539 dr->wLength = cpu_to_le16(2);
540
541 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
542 (unsigned char *)dr, buffer, 2,
543 mos7840_control_callback, mcs);
544 mcs->control_urb->transfer_buffer_length = 2;
545 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
546 return ret;
547 }
548
549 static void mos7840_set_led_callback(struct urb *urb)
550 {
551 switch (urb->status) {
552 case 0:
553 /* Success */
554 break;
555 case -ECONNRESET:
556 case -ENOENT:
557 case -ESHUTDOWN:
558 /* This urb is terminated, clean up */
559 dbg("%s - urb shutting down with status: %d", __func__,
560 urb->status);
561 break;
562 default:
563 dbg("%s - nonzero urb status received: %d", __func__,
564 urb->status);
565 }
566 }
567
568 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
569 __u16 reg)
570 {
571 struct usb_device *dev = mcs->port->serial->dev;
572 struct usb_ctrlrequest *dr = mcs->dr;
573
574 dr->bRequestType = MCS_WR_RTYPE;
575 dr->bRequest = MCS_WRREQ;
576 dr->wValue = cpu_to_le16(wval);
577 dr->wIndex = cpu_to_le16(reg);
578 dr->wLength = cpu_to_le16(0);
579
580 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
581 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
582
583 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
584 }
585
586 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
587 __u16 val)
588 {
589 struct usb_device *dev = port->serial->dev;
590
591 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
592 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
593 }
594
595 static void mos7840_led_off(unsigned long arg)
596 {
597 struct moschip_port *mcs = (struct moschip_port *) arg;
598
599 /* Turn off LED */
600 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
601 mod_timer(&mcs->led_timer2,
602 jiffies + msecs_to_jiffies(LED_OFF_MS));
603 }
604
605 static void mos7840_led_flag_off(unsigned long arg)
606 {
607 struct moschip_port *mcs = (struct moschip_port *) arg;
608
609 mcs->led_flag = false;
610 }
611
612 /*****************************************************************************
613 * mos7840_interrupt_callback
614 * this is the callback function for when we have received data on the
615 * interrupt endpoint.
616 *****************************************************************************/
617
618 static void mos7840_interrupt_callback(struct urb *urb)
619 {
620 int result;
621 int length;
622 struct moschip_port *mos7840_port;
623 struct usb_serial *serial;
624 __u16 Data;
625 unsigned char *data;
626 __u8 sp[5], st;
627 int i, rv = 0;
628 __u16 wval, wreg = 0;
629 int status = urb->status;
630
631 switch (status) {
632 case 0:
633 /* success */
634 break;
635 case -ECONNRESET:
636 case -ENOENT:
637 case -ESHUTDOWN:
638 /* this urb is terminated, clean up */
639 dbg("%s - urb shutting down with status: %d", __func__,
640 status);
641 return;
642 default:
643 dbg("%s - nonzero urb status received: %d", __func__,
644 status);
645 goto exit;
646 }
647
648 length = urb->actual_length;
649 data = urb->transfer_buffer;
650
651 serial = urb->context;
652
653 /* Moschip get 5 bytes
654 * Byte 1 IIR Port 1 (port.number is 0)
655 * Byte 2 IIR Port 2 (port.number is 1)
656 * Byte 3 IIR Port 3 (port.number is 2)
657 * Byte 4 IIR Port 4 (port.number is 3)
658 * Byte 5 FIFO status for both */
659
660 if (length && length > 5) {
661 dbg("%s", "Wrong data !!!");
662 return;
663 }
664
665 sp[0] = (__u8) data[0];
666 sp[1] = (__u8) data[1];
667 sp[2] = (__u8) data[2];
668 sp[3] = (__u8) data[3];
669 st = (__u8) data[4];
670
671 for (i = 0; i < serial->num_ports; i++) {
672 mos7840_port = mos7840_get_port_private(serial->port[i]);
673 wval =
674 (((__u16) serial->port[i]->number -
675 (__u16) (serial->minor)) + 1) << 8;
676 if (mos7840_port->open) {
677 if (sp[i] & 0x01) {
678 dbg("SP%d No Interrupt !!!", i);
679 } else {
680 switch (sp[i] & 0x0f) {
681 case SERIAL_IIR_RLS:
682 dbg("Serial Port %d: Receiver status error or ", i);
683 dbg("address bit detected in 9-bit mode");
684 mos7840_port->MsrLsr = 1;
685 wreg = LINE_STATUS_REGISTER;
686 break;
687 case SERIAL_IIR_MS:
688 dbg("Serial Port %d: Modem status change", i);
689 mos7840_port->MsrLsr = 0;
690 wreg = MODEM_STATUS_REGISTER;
691 break;
692 }
693 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
694 }
695 }
696 }
697 if (!(rv < 0))
698 /* the completion handler for the control urb will resubmit */
699 return;
700 exit:
701 result = usb_submit_urb(urb, GFP_ATOMIC);
702 if (result) {
703 dev_err(&urb->dev->dev,
704 "%s - Error %d submitting interrupt urb\n",
705 __func__, result);
706 }
707 }
708
709 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
710 const char *function)
711 {
712 if (!port) {
713 dbg("%s - port == NULL", function);
714 return -1;
715 }
716 if (!port->serial) {
717 dbg("%s - port->serial == NULL", function);
718 return -1;
719 }
720
721 return 0;
722 }
723
724 /* Inline functions to check the sanity of a pointer that is passed to us */
725 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
726 const char *function)
727 {
728 if (!serial) {
729 dbg("%s - serial == NULL", function);
730 return -1;
731 }
732 if (!serial->type) {
733 dbg("%s - serial->type == NULL!", function);
734 return -1;
735 }
736
737 return 0;
738 }
739
740 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
741 const char *function)
742 {
743 /* if no port was specified, or it fails a paranoia check */
744 if (!port ||
745 mos7840_port_paranoia_check(port, function) ||
746 mos7840_serial_paranoia_check(port->serial, function)) {
747 /* then say that we don't have a valid usb_serial thing,
748 * which will end up genrating -ENODEV return values */
749 return NULL;
750 }
751
752 return port->serial;
753 }
754
755 /*****************************************************************************
756 * mos7840_bulk_in_callback
757 * this is the callback function for when we have received data on the
758 * bulk in endpoint.
759 *****************************************************************************/
760
761 static void mos7840_bulk_in_callback(struct urb *urb)
762 {
763 int retval;
764 unsigned char *data;
765 struct usb_serial *serial;
766 struct usb_serial_port *port;
767 struct moschip_port *mos7840_port;
768 struct tty_struct *tty;
769 int status = urb->status;
770
771 mos7840_port = urb->context;
772 if (!mos7840_port) {
773 dbg("%s", "NULL mos7840_port pointer");
774 return;
775 }
776
777 if (status) {
778 dbg("nonzero read bulk status received: %d", status);
779 mos7840_port->read_urb_busy = false;
780 return;
781 }
782
783 port = (struct usb_serial_port *)mos7840_port->port;
784 if (mos7840_port_paranoia_check(port, __func__)) {
785 dbg("%s", "Port Paranoia failed");
786 mos7840_port->read_urb_busy = false;
787 return;
788 }
789
790 serial = mos7840_get_usb_serial(port, __func__);
791 if (!serial) {
792 dbg("%s", "Bad serial pointer");
793 mos7840_port->read_urb_busy = false;
794 return;
795 }
796
797 data = urb->transfer_buffer;
798
799 if (urb->actual_length) {
800 tty = tty_port_tty_get(&mos7840_port->port->port);
801 if (tty) {
802 tty_insert_flip_string(tty, data, urb->actual_length);
803 dbg(" %s ", data);
804 tty_flip_buffer_push(tty);
805 tty_kref_put(tty);
806 }
807 mos7840_port->icount.rx += urb->actual_length;
808 smp_wmb();
809 dbg("mos7840_port->icount.rx is %d:",
810 mos7840_port->icount.rx);
811 }
812
813 if (!mos7840_port->read_urb) {
814 dbg("%s", "URB KILLED !!!");
815 mos7840_port->read_urb_busy = false;
816 return;
817 }
818
819 /* Turn on LED */
820 if (mos7840_port->has_led && !mos7840_port->led_flag) {
821 mos7840_port->led_flag = true;
822 mos7840_set_led_async(mos7840_port, 0x0301,
823 MODEM_CONTROL_REGISTER);
824 mod_timer(&mos7840_port->led_timer1,
825 jiffies + msecs_to_jiffies(LED_ON_MS));
826 }
827
828 mos7840_port->read_urb_busy = true;
829 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
830
831 if (retval) {
832 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
833 mos7840_port->read_urb_busy = false;
834 }
835 }
836
837 /*****************************************************************************
838 * mos7840_bulk_out_data_callback
839 * this is the callback function for when we have finished sending
840 * serial data on the bulk out endpoint.
841 *****************************************************************************/
842
843 static void mos7840_bulk_out_data_callback(struct urb *urb)
844 {
845 struct moschip_port *mos7840_port;
846 struct tty_struct *tty;
847 int status = urb->status;
848 int i;
849
850 mos7840_port = urb->context;
851 spin_lock(&mos7840_port->pool_lock);
852 for (i = 0; i < NUM_URBS; i++) {
853 if (urb == mos7840_port->write_urb_pool[i]) {
854 mos7840_port->busy[i] = 0;
855 break;
856 }
857 }
858 spin_unlock(&mos7840_port->pool_lock);
859
860 if (status) {
861 dbg("nonzero write bulk status received:%d", status);
862 return;
863 }
864
865 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
866 dbg("%s", "Port Paranoia failed");
867 return;
868 }
869
870 tty = tty_port_tty_get(&mos7840_port->port->port);
871 if (tty && mos7840_port->open)
872 tty_wakeup(tty);
873 tty_kref_put(tty);
874
875 }
876
877 /************************************************************************/
878 /* 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 */
879 /************************************************************************/
880 #ifdef MCSSerialProbe
881 static int mos7840_serial_probe(struct usb_serial *serial,
882 const struct usb_device_id *id)
883 {
884
885 /*need to implement the mode_reg reading and updating\
886 structures usb_serial_ device_type\
887 (i.e num_ports, num_bulkin,bulkout etc) */
888 /* Also we can update the changes attach */
889 return 1;
890 }
891 #endif
892
893 /*****************************************************************************
894 * mos7840_open
895 * this function is called by the tty driver when a port is opened
896 * If successful, we return 0
897 * Otherwise we return a negative error number.
898 *****************************************************************************/
899
900 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
901 {
902 int response;
903 int j;
904 struct usb_serial *serial;
905 struct urb *urb;
906 __u16 Data;
907 int status;
908 struct moschip_port *mos7840_port;
909 struct moschip_port *port0;
910
911 if (mos7840_port_paranoia_check(port, __func__)) {
912 dbg("%s", "Port Paranoia failed");
913 return -ENODEV;
914 }
915
916 serial = port->serial;
917
918 if (mos7840_serial_paranoia_check(serial, __func__)) {
919 dbg("%s", "Serial Paranoia failed");
920 return -ENODEV;
921 }
922
923 mos7840_port = mos7840_get_port_private(port);
924 port0 = mos7840_get_port_private(serial->port[0]);
925
926 if (mos7840_port == NULL || port0 == NULL)
927 return -ENODEV;
928
929 usb_clear_halt(serial->dev, port->write_urb->pipe);
930 usb_clear_halt(serial->dev, port->read_urb->pipe);
931 port0->open_ports++;
932
933 /* Initialising the write urb pool */
934 for (j = 0; j < NUM_URBS; ++j) {
935 urb = usb_alloc_urb(0, GFP_KERNEL);
936 mos7840_port->write_urb_pool[j] = urb;
937
938 if (urb == NULL) {
939 dev_err(&port->dev, "No more urbs???\n");
940 continue;
941 }
942
943 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
944 GFP_KERNEL);
945 if (!urb->transfer_buffer) {
946 usb_free_urb(urb);
947 mos7840_port->write_urb_pool[j] = NULL;
948 dev_err(&port->dev,
949 "%s-out of memory for urb buffers.\n",
950 __func__);
951 continue;
952 }
953 }
954
955 /*****************************************************************************
956 * Initialize MCS7840 -- Write Init values to corresponding Registers
957 *
958 * Register Index
959 * 1 : IER
960 * 2 : FCR
961 * 3 : LCR
962 * 4 : MCR
963 *
964 * 0x08 : SP1/2 Control Reg
965 *****************************************************************************/
966
967 /* NEED to check the following Block */
968
969 Data = 0x0;
970 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
971 if (status < 0) {
972 dbg("Reading Spreg failed");
973 return -1;
974 }
975 Data |= 0x80;
976 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
977 if (status < 0) {
978 dbg("writing Spreg failed");
979 return -1;
980 }
981
982 Data &= ~0x80;
983 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
984 if (status < 0) {
985 dbg("writing Spreg failed");
986 return -1;
987 }
988 /* End of block to be checked */
989
990 Data = 0x0;
991 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
992 &Data);
993 if (status < 0) {
994 dbg("Reading Controlreg failed");
995 return -1;
996 }
997 Data |= 0x08; /* Driver done bit */
998 Data |= 0x20; /* rx_disable */
999 status = mos7840_set_reg_sync(port,
1000 mos7840_port->ControlRegOffset, Data);
1001 if (status < 0) {
1002 dbg("writing Controlreg failed");
1003 return -1;
1004 }
1005 /* do register settings here */
1006 /* Set all regs to the device default values. */
1007 /***********************************
1008 * First Disable all interrupts.
1009 ***********************************/
1010 Data = 0x00;
1011 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1012 if (status < 0) {
1013 dbg("disabling interrupts failed");
1014 return -1;
1015 }
1016 /* Set FIFO_CONTROL_REGISTER to the default value */
1017 Data = 0x00;
1018 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1019 if (status < 0) {
1020 dbg("Writing FIFO_CONTROL_REGISTER failed");
1021 return -1;
1022 }
1023
1024 Data = 0xcf;
1025 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1026 if (status < 0) {
1027 dbg("Writing FIFO_CONTROL_REGISTER failed");
1028 return -1;
1029 }
1030
1031 Data = 0x03;
1032 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1033 mos7840_port->shadowLCR = Data;
1034
1035 Data = 0x0b;
1036 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1037 mos7840_port->shadowMCR = Data;
1038
1039 Data = 0x00;
1040 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1041 mos7840_port->shadowLCR = Data;
1042
1043 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1044 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1045
1046 Data = 0x0c;
1047 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1048
1049 Data = 0x0;
1050 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1051
1052 Data = 0x00;
1053 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1054
1055 Data = Data & ~SERIAL_LCR_DLAB;
1056 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1057 mos7840_port->shadowLCR = Data;
1058
1059 /* clearing Bulkin and Bulkout Fifo */
1060 Data = 0x0;
1061 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1062
1063 Data = Data | 0x0c;
1064 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1065
1066 Data = Data & ~0x0c;
1067 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1068 /* Finally enable all interrupts */
1069 Data = 0x0c;
1070 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1071
1072 /* clearing rx_disable */
1073 Data = 0x0;
1074 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1075 &Data);
1076 Data = Data & ~0x20;
1077 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1078 Data);
1079
1080 /* rx_negate */
1081 Data = 0x0;
1082 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1083 &Data);
1084 Data = Data | 0x10;
1085 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1086 Data);
1087
1088 /* Check to see if we've set up our endpoint info yet *
1089 * (can't set it up in mos7840_startup as the structures *
1090 * were not set up at that time.) */
1091 if (port0->open_ports == 1) {
1092 if (serial->port[0]->interrupt_in_buffer == NULL) {
1093 /* set up interrupt urb */
1094 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1095 serial->dev,
1096 usb_rcvintpipe(serial->dev,
1097 serial->port[0]->interrupt_in_endpointAddress),
1098 serial->port[0]->interrupt_in_buffer,
1099 serial->port[0]->interrupt_in_urb->
1100 transfer_buffer_length,
1101 mos7840_interrupt_callback,
1102 serial,
1103 serial->port[0]->interrupt_in_urb->interval);
1104
1105 /* start interrupt read for mos7840 *
1106 * will continue as long as mos7840 is connected */
1107
1108 response =
1109 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1110 GFP_KERNEL);
1111 if (response) {
1112 dev_err(&port->dev, "%s - Error %d submitting "
1113 "interrupt urb\n", __func__, response);
1114 }
1115
1116 }
1117
1118 }
1119
1120 /* see if we've set up our endpoint info yet *
1121 * (can't set it up in mos7840_startup as the *
1122 * structures were not set up at that time.) */
1123
1124 dbg("port number is %d", port->number);
1125 dbg("serial number is %d", port->serial->minor);
1126 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1127 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1128 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1129 dbg("port's number in the device is %d", mos7840_port->port_num);
1130 mos7840_port->read_urb = port->read_urb;
1131
1132 /* set up our bulk in urb */
1133 if ((serial->num_ports == 2)
1134 && ((((__u16)port->number -
1135 (__u16)(port->serial->minor)) % 2) != 0)) {
1136 usb_fill_bulk_urb(mos7840_port->read_urb,
1137 serial->dev,
1138 usb_rcvbulkpipe(serial->dev,
1139 (port->bulk_in_endpointAddress) + 2),
1140 port->bulk_in_buffer,
1141 mos7840_port->read_urb->transfer_buffer_length,
1142 mos7840_bulk_in_callback, mos7840_port);
1143 } else {
1144 usb_fill_bulk_urb(mos7840_port->read_urb,
1145 serial->dev,
1146 usb_rcvbulkpipe(serial->dev,
1147 port->bulk_in_endpointAddress),
1148 port->bulk_in_buffer,
1149 mos7840_port->read_urb->transfer_buffer_length,
1150 mos7840_bulk_in_callback, mos7840_port);
1151 }
1152
1153 dbg("mos7840_open: bulkin endpoint is %d",
1154 port->bulk_in_endpointAddress);
1155 mos7840_port->read_urb_busy = true;
1156 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1157 if (response) {
1158 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1159 __func__, response);
1160 mos7840_port->read_urb_busy = false;
1161 }
1162
1163 /* initialize our wait queues */
1164 init_waitqueue_head(&mos7840_port->wait_chase);
1165 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1166
1167 /* initialize our icount structure */
1168 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1169
1170 /* initialize our port settings */
1171 /* Must set to enable ints! */
1172 mos7840_port->shadowMCR = MCR_MASTER_IE;
1173 /* send a open port command */
1174 mos7840_port->open = 1;
1175 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1176 mos7840_port->icount.tx = 0;
1177 mos7840_port->icount.rx = 0;
1178
1179 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1180 serial, mos7840_port, port);
1181
1182 return 0;
1183 }
1184
1185 /*****************************************************************************
1186 * mos7840_chars_in_buffer
1187 * this function is called by the tty driver when it wants to know how many
1188 * bytes of data we currently have outstanding in the port (data that has
1189 * been written, but hasn't made it out the port yet)
1190 * If successful, we return the number of bytes left to be written in the
1191 * system,
1192 * Otherwise we return zero.
1193 *****************************************************************************/
1194
1195 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1196 {
1197 struct usb_serial_port *port = tty->driver_data;
1198 int i;
1199 int chars = 0;
1200 unsigned long flags;
1201 struct moschip_port *mos7840_port;
1202
1203 if (mos7840_port_paranoia_check(port, __func__)) {
1204 dbg("%s", "Invalid port");
1205 return 0;
1206 }
1207
1208 mos7840_port = mos7840_get_port_private(port);
1209 if (mos7840_port == NULL)
1210 return 0;
1211
1212 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1213 for (i = 0; i < NUM_URBS; ++i) {
1214 if (mos7840_port->busy[i]) {
1215 struct urb *urb = mos7840_port->write_urb_pool[i];
1216 chars += urb->transfer_buffer_length;
1217 }
1218 }
1219 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1220 dbg("%s - returns %d", __func__, chars);
1221 return chars;
1222
1223 }
1224
1225 /*****************************************************************************
1226 * mos7840_close
1227 * this function is called by the tty driver when a port is closed
1228 *****************************************************************************/
1229
1230 static void mos7840_close(struct usb_serial_port *port)
1231 {
1232 struct usb_serial *serial;
1233 struct moschip_port *mos7840_port;
1234 struct moschip_port *port0;
1235 int j;
1236 __u16 Data;
1237
1238 if (mos7840_port_paranoia_check(port, __func__)) {
1239 dbg("%s", "Port Paranoia failed");
1240 return;
1241 }
1242
1243 serial = mos7840_get_usb_serial(port, __func__);
1244 if (!serial) {
1245 dbg("%s", "Serial Paranoia failed");
1246 return;
1247 }
1248
1249 mos7840_port = mos7840_get_port_private(port);
1250 port0 = mos7840_get_port_private(serial->port[0]);
1251
1252 if (mos7840_port == NULL || port0 == NULL)
1253 return;
1254
1255 for (j = 0; j < NUM_URBS; ++j)
1256 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1257
1258 /* Freeing Write URBs */
1259 for (j = 0; j < NUM_URBS; ++j) {
1260 if (mos7840_port->write_urb_pool[j]) {
1261 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1262 kfree(mos7840_port->write_urb_pool[j]->
1263 transfer_buffer);
1264
1265 usb_free_urb(mos7840_port->write_urb_pool[j]);
1266 }
1267 }
1268
1269 /* While closing port, shutdown all bulk read, write *
1270 * and interrupt read if they exists */
1271 if (serial->dev) {
1272 if (mos7840_port->write_urb) {
1273 dbg("%s", "Shutdown bulk write");
1274 usb_kill_urb(mos7840_port->write_urb);
1275 }
1276 if (mos7840_port->read_urb) {
1277 dbg("%s", "Shutdown bulk read");
1278 usb_kill_urb(mos7840_port->read_urb);
1279 mos7840_port->read_urb_busy = false;
1280 }
1281 if ((&mos7840_port->control_urb)) {
1282 dbg("%s", "Shutdown control read");
1283 /*/ usb_kill_urb (mos7840_port->control_urb); */
1284 }
1285 }
1286 /* if(mos7840_port->ctrl_buf != NULL) */
1287 /* kfree(mos7840_port->ctrl_buf); */
1288 port0->open_ports--;
1289 dbg("mos7840_num_open_ports in close%d:in port%d",
1290 port0->open_ports, port->number);
1291 if (port0->open_ports == 0) {
1292 if (serial->port[0]->interrupt_in_urb) {
1293 dbg("%s", "Shutdown interrupt_in_urb");
1294 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1295 }
1296 }
1297
1298 if (mos7840_port->write_urb) {
1299 /* if this urb had a transfer buffer already (old tx) free it */
1300 if (mos7840_port->write_urb->transfer_buffer != NULL)
1301 kfree(mos7840_port->write_urb->transfer_buffer);
1302 usb_free_urb(mos7840_port->write_urb);
1303 }
1304
1305 Data = 0x0;
1306 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1307
1308 Data = 0x00;
1309 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1310
1311 mos7840_port->open = 0;
1312 }
1313
1314 /************************************************************************
1315 *
1316 * mos7840_block_until_chase_response
1317 *
1318 * This function will block the close until one of the following:
1319 * 1. Response to our Chase comes from mos7840
1320 * 2. A timeout of 10 seconds without activity has expired
1321 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1322 *
1323 ************************************************************************/
1324
1325 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1326 struct moschip_port *mos7840_port)
1327 {
1328 int timeout = msecs_to_jiffies(1000);
1329 int wait = 10;
1330 int count;
1331
1332 while (1) {
1333 count = mos7840_chars_in_buffer(tty);
1334
1335 /* Check for Buffer status */
1336 if (count <= 0)
1337 return;
1338
1339 /* Block the thread for a while */
1340 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1341 timeout);
1342 /* No activity.. count down section */
1343 wait--;
1344 if (wait == 0) {
1345 dbg("%s - TIMEOUT", __func__);
1346 return;
1347 } else {
1348 /* Reset timeout value back to seconds */
1349 wait = 10;
1350 }
1351 }
1352
1353 }
1354
1355 /*****************************************************************************
1356 * mos7840_break
1357 * this function sends a break to the port
1358 *****************************************************************************/
1359 static void mos7840_break(struct tty_struct *tty, int break_state)
1360 {
1361 struct usb_serial_port *port = tty->driver_data;
1362 unsigned char data;
1363 struct usb_serial *serial;
1364 struct moschip_port *mos7840_port;
1365
1366 if (mos7840_port_paranoia_check(port, __func__)) {
1367 dbg("%s", "Port Paranoia failed");
1368 return;
1369 }
1370
1371 serial = mos7840_get_usb_serial(port, __func__);
1372 if (!serial) {
1373 dbg("%s", "Serial Paranoia failed");
1374 return;
1375 }
1376
1377 mos7840_port = mos7840_get_port_private(port);
1378
1379 if (mos7840_port == NULL)
1380 return;
1381
1382 if (serial->dev)
1383 /* flush and block until tx is empty */
1384 mos7840_block_until_chase_response(tty, mos7840_port);
1385
1386 if (break_state == -1)
1387 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1388 else
1389 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1390
1391 /* FIXME: no locking on shadowLCR anywhere in driver */
1392 mos7840_port->shadowLCR = data;
1393 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1394 mos7840_port->shadowLCR);
1395 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1396 mos7840_port->shadowLCR);
1397 }
1398
1399 /*****************************************************************************
1400 * mos7840_write_room
1401 * this function is called by the tty driver when it wants to know how many
1402 * bytes of data we can accept for a specific port.
1403 * If successful, we return the amount of room that we have for this port
1404 * Otherwise we return a negative error number.
1405 *****************************************************************************/
1406
1407 static int mos7840_write_room(struct tty_struct *tty)
1408 {
1409 struct usb_serial_port *port = tty->driver_data;
1410 int i;
1411 int room = 0;
1412 unsigned long flags;
1413 struct moschip_port *mos7840_port;
1414
1415 if (mos7840_port_paranoia_check(port, __func__)) {
1416 dbg("%s", "Invalid port");
1417 dbg("%s", " mos7840_write_room:leaving ...........");
1418 return -1;
1419 }
1420
1421 mos7840_port = mos7840_get_port_private(port);
1422 if (mos7840_port == NULL) {
1423 dbg("%s", "mos7840_break:leaving ...........");
1424 return -1;
1425 }
1426
1427 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1428 for (i = 0; i < NUM_URBS; ++i) {
1429 if (!mos7840_port->busy[i])
1430 room += URB_TRANSFER_BUFFER_SIZE;
1431 }
1432 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1433
1434 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1435 dbg("%s - returns %d", __func__, room);
1436 return room;
1437
1438 }
1439
1440 /*****************************************************************************
1441 * mos7840_write
1442 * this function is called by the tty driver when data should be written to
1443 * the port.
1444 * If successful, we return the number of bytes written, otherwise we
1445 * return a negative error number.
1446 *****************************************************************************/
1447
1448 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1449 const unsigned char *data, int count)
1450 {
1451 int status;
1452 int i;
1453 int bytes_sent = 0;
1454 int transfer_size;
1455 unsigned long flags;
1456
1457 struct moschip_port *mos7840_port;
1458 struct usb_serial *serial;
1459 struct urb *urb;
1460 /* __u16 Data; */
1461 const unsigned char *current_position = data;
1462 unsigned char *data1;
1463
1464 #ifdef NOTMOS7840
1465 Data = 0x00;
1466 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1467 mos7840_port->shadowLCR = Data;
1468 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1469 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1470 mos7840_port->shadowLCR);
1471
1472 /* Data = 0x03; */
1473 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1474 /* mos7840_port->shadowLCR=Data;//Need to add later */
1475
1476 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1477 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1478
1479 /* Data = 0x0c; */
1480 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1481 Data = 0x00;
1482 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1483 dbg("mos7840_write:DLL value is %x", Data);
1484
1485 Data = 0x0;
1486 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1487 dbg("mos7840_write:DLM value is %x", Data);
1488
1489 Data = Data & ~SERIAL_LCR_DLAB;
1490 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1491 mos7840_port->shadowLCR);
1492 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1493 #endif
1494
1495 if (mos7840_port_paranoia_check(port, __func__)) {
1496 dbg("%s", "Port Paranoia failed");
1497 return -1;
1498 }
1499
1500 serial = port->serial;
1501 if (mos7840_serial_paranoia_check(serial, __func__)) {
1502 dbg("%s", "Serial Paranoia failed");
1503 return -1;
1504 }
1505
1506 mos7840_port = mos7840_get_port_private(port);
1507 if (mos7840_port == NULL) {
1508 dbg("%s", "mos7840_port is NULL");
1509 return -1;
1510 }
1511
1512 /* try to find a free urb in the list */
1513 urb = NULL;
1514
1515 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1516 for (i = 0; i < NUM_URBS; ++i) {
1517 if (!mos7840_port->busy[i]) {
1518 mos7840_port->busy[i] = 1;
1519 urb = mos7840_port->write_urb_pool[i];
1520 dbg("URB:%d", i);
1521 break;
1522 }
1523 }
1524 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1525
1526 if (urb == NULL) {
1527 dbg("%s - no more free urbs", __func__);
1528 goto exit;
1529 }
1530
1531 if (urb->transfer_buffer == NULL) {
1532 urb->transfer_buffer =
1533 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1534
1535 if (urb->transfer_buffer == NULL) {
1536 dev_err_console(port, "%s no more kernel memory...\n",
1537 __func__);
1538 goto exit;
1539 }
1540 }
1541 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1542
1543 memcpy(urb->transfer_buffer, current_position, transfer_size);
1544
1545 /* fill urb with data and submit */
1546 if ((serial->num_ports == 2)
1547 && ((((__u16)port->number -
1548 (__u16)(port->serial->minor)) % 2) != 0)) {
1549 usb_fill_bulk_urb(urb,
1550 serial->dev,
1551 usb_sndbulkpipe(serial->dev,
1552 (port->bulk_out_endpointAddress) + 2),
1553 urb->transfer_buffer,
1554 transfer_size,
1555 mos7840_bulk_out_data_callback, mos7840_port);
1556 } else {
1557 usb_fill_bulk_urb(urb,
1558 serial->dev,
1559 usb_sndbulkpipe(serial->dev,
1560 port->bulk_out_endpointAddress),
1561 urb->transfer_buffer,
1562 transfer_size,
1563 mos7840_bulk_out_data_callback, mos7840_port);
1564 }
1565
1566 data1 = urb->transfer_buffer;
1567 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1568
1569 /* Turn on LED */
1570 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1571 mos7840_port->led_flag = true;
1572 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1573 mod_timer(&mos7840_port->led_timer1,
1574 jiffies + msecs_to_jiffies(LED_ON_MS));
1575 }
1576
1577 /* send it down the pipe */
1578 status = usb_submit_urb(urb, GFP_ATOMIC);
1579
1580 if (status) {
1581 mos7840_port->busy[i] = 0;
1582 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1583 "with status = %d\n", __func__, status);
1584 bytes_sent = status;
1585 goto exit;
1586 }
1587 bytes_sent = transfer_size;
1588 mos7840_port->icount.tx += transfer_size;
1589 smp_wmb();
1590 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1591 exit:
1592 return bytes_sent;
1593
1594 }
1595
1596 /*****************************************************************************
1597 * mos7840_throttle
1598 * this function is called by the tty driver when it wants to stop the data
1599 * being read from the port.
1600 *****************************************************************************/
1601
1602 static void mos7840_throttle(struct tty_struct *tty)
1603 {
1604 struct usb_serial_port *port = tty->driver_data;
1605 struct moschip_port *mos7840_port;
1606 int status;
1607
1608 if (mos7840_port_paranoia_check(port, __func__)) {
1609 dbg("%s", "Invalid port");
1610 return;
1611 }
1612
1613 dbg("- port %d", port->number);
1614
1615 mos7840_port = mos7840_get_port_private(port);
1616
1617 if (mos7840_port == NULL)
1618 return;
1619
1620 if (!mos7840_port->open) {
1621 dbg("%s", "port not opened");
1622 return;
1623 }
1624
1625 /* if we are implementing XON/XOFF, send the stop character */
1626 if (I_IXOFF(tty)) {
1627 unsigned char stop_char = STOP_CHAR(tty);
1628 status = mos7840_write(tty, port, &stop_char, 1);
1629 if (status <= 0)
1630 return;
1631 }
1632 /* if we are implementing RTS/CTS, toggle that line */
1633 if (tty->termios->c_cflag & CRTSCTS) {
1634 mos7840_port->shadowMCR &= ~MCR_RTS;
1635 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1636 mos7840_port->shadowMCR);
1637 if (status < 0)
1638 return;
1639 }
1640 }
1641
1642 /*****************************************************************************
1643 * mos7840_unthrottle
1644 * this function is called by the tty driver when it wants to resume
1645 * the data being read from the port (called after mos7840_throttle is
1646 * called)
1647 *****************************************************************************/
1648 static void mos7840_unthrottle(struct tty_struct *tty)
1649 {
1650 struct usb_serial_port *port = tty->driver_data;
1651 int status;
1652 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1653
1654 if (mos7840_port_paranoia_check(port, __func__)) {
1655 dbg("%s", "Invalid port");
1656 return;
1657 }
1658
1659 if (mos7840_port == NULL)
1660 return;
1661
1662 if (!mos7840_port->open) {
1663 dbg("%s - port not opened", __func__);
1664 return;
1665 }
1666
1667 /* if we are implementing XON/XOFF, send the start character */
1668 if (I_IXOFF(tty)) {
1669 unsigned char start_char = START_CHAR(tty);
1670 status = mos7840_write(tty, port, &start_char, 1);
1671 if (status <= 0)
1672 return;
1673 }
1674
1675 /* if we are implementing RTS/CTS, toggle that line */
1676 if (tty->termios->c_cflag & CRTSCTS) {
1677 mos7840_port->shadowMCR |= MCR_RTS;
1678 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1679 mos7840_port->shadowMCR);
1680 if (status < 0)
1681 return;
1682 }
1683 }
1684
1685 static int mos7840_tiocmget(struct tty_struct *tty)
1686 {
1687 struct usb_serial_port *port = tty->driver_data;
1688 struct moschip_port *mos7840_port;
1689 unsigned int result;
1690 __u16 msr;
1691 __u16 mcr;
1692 int status;
1693 mos7840_port = mos7840_get_port_private(port);
1694
1695 if (mos7840_port == NULL)
1696 return -ENODEV;
1697
1698 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1699 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1700 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1701 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1702 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1703 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1704 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1705 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1706 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1707
1708 dbg("%s - 0x%04X", __func__, result);
1709
1710 return result;
1711 }
1712
1713 static int mos7840_tiocmset(struct tty_struct *tty,
1714 unsigned int set, unsigned int clear)
1715 {
1716 struct usb_serial_port *port = tty->driver_data;
1717 struct moschip_port *mos7840_port;
1718 unsigned int mcr;
1719 int status;
1720
1721 mos7840_port = mos7840_get_port_private(port);
1722
1723 if (mos7840_port == NULL)
1724 return -ENODEV;
1725
1726 /* FIXME: What locks the port registers ? */
1727 mcr = mos7840_port->shadowMCR;
1728 if (clear & TIOCM_RTS)
1729 mcr &= ~MCR_RTS;
1730 if (clear & TIOCM_DTR)
1731 mcr &= ~MCR_DTR;
1732 if (clear & TIOCM_LOOP)
1733 mcr &= ~MCR_LOOPBACK;
1734
1735 if (set & TIOCM_RTS)
1736 mcr |= MCR_RTS;
1737 if (set & TIOCM_DTR)
1738 mcr |= MCR_DTR;
1739 if (set & TIOCM_LOOP)
1740 mcr |= MCR_LOOPBACK;
1741
1742 mos7840_port->shadowMCR = mcr;
1743
1744 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1745 if (status < 0) {
1746 dbg("setting MODEM_CONTROL_REGISTER Failed");
1747 return status;
1748 }
1749
1750 return 0;
1751 }
1752
1753 /*****************************************************************************
1754 * mos7840_calc_baud_rate_divisor
1755 * this function calculates the proper baud rate divisor for the specified
1756 * baud rate.
1757 *****************************************************************************/
1758 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1759 __u16 *clk_sel_val)
1760 {
1761 dbg("%s - %d", __func__, baudRate);
1762
1763 if (baudRate <= 115200) {
1764 *divisor = 115200 / baudRate;
1765 *clk_sel_val = 0x0;
1766 }
1767 if ((baudRate > 115200) && (baudRate <= 230400)) {
1768 *divisor = 230400 / baudRate;
1769 *clk_sel_val = 0x10;
1770 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1771 *divisor = 403200 / baudRate;
1772 *clk_sel_val = 0x20;
1773 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1774 *divisor = 460800 / baudRate;
1775 *clk_sel_val = 0x30;
1776 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1777 *divisor = 806400 / baudRate;
1778 *clk_sel_val = 0x40;
1779 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1780 *divisor = 921600 / baudRate;
1781 *clk_sel_val = 0x50;
1782 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1783 *divisor = 1572864 / baudRate;
1784 *clk_sel_val = 0x60;
1785 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1786 *divisor = 3145728 / baudRate;
1787 *clk_sel_val = 0x70;
1788 }
1789 return 0;
1790
1791 #ifdef NOTMCS7840
1792
1793 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1794 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1795 *divisor = mos7840_divisor_table[i].Divisor;
1796 return 0;
1797 }
1798 }
1799
1800 /* After trying for all the standard baud rates *
1801 * Try calculating the divisor for this baud rate */
1802
1803 if (baudrate > 75 && baudrate < 230400) {
1804 /* get the divisor */
1805 custom = (__u16) (230400L / baudrate);
1806
1807 /* Check for round off */
1808 round1 = (__u16) (2304000L / baudrate);
1809 round = (__u16) (round1 - (custom * 10));
1810 if (round > 4)
1811 custom++;
1812 *divisor = custom;
1813
1814 dbg(" Baud %d = %d", baudrate, custom);
1815 return 0;
1816 }
1817
1818 dbg("%s", " Baud calculation Failed...");
1819 return -1;
1820 #endif
1821 }
1822
1823 /*****************************************************************************
1824 * mos7840_send_cmd_write_baud_rate
1825 * this function sends the proper command to change the baud rate of the
1826 * specified port.
1827 *****************************************************************************/
1828
1829 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1830 int baudRate)
1831 {
1832 int divisor = 0;
1833 int status;
1834 __u16 Data;
1835 unsigned char number;
1836 __u16 clk_sel_val;
1837 struct usb_serial_port *port;
1838
1839 if (mos7840_port == NULL)
1840 return -1;
1841
1842 port = (struct usb_serial_port *)mos7840_port->port;
1843 if (mos7840_port_paranoia_check(port, __func__)) {
1844 dbg("%s", "Invalid port");
1845 return -1;
1846 }
1847
1848 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1849 dbg("%s", "Invalid Serial");
1850 return -1;
1851 }
1852
1853 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1854
1855 dbg("%s - port = %d, baud = %d", __func__,
1856 mos7840_port->port->number, baudRate);
1857 /* reset clk_uart_sel in spregOffset */
1858 if (baudRate > 115200) {
1859 #ifdef HW_flow_control
1860 /* NOTE: need to see the pther register to modify */
1861 /* setting h/w flow control bit to 1 */
1862 Data = 0x2b;
1863 mos7840_port->shadowMCR = Data;
1864 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1865 Data);
1866 if (status < 0) {
1867 dbg("Writing spreg failed in set_serial_baud");
1868 return -1;
1869 }
1870 #endif
1871
1872 } else {
1873 #ifdef HW_flow_control
1874 /* setting h/w flow control bit to 0 */
1875 Data = 0xb;
1876 mos7840_port->shadowMCR = Data;
1877 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1878 Data);
1879 if (status < 0) {
1880 dbg("Writing spreg failed in set_serial_baud");
1881 return -1;
1882 }
1883 #endif
1884
1885 }
1886
1887 if (1) { /* baudRate <= 115200) */
1888 clk_sel_val = 0x0;
1889 Data = 0x0;
1890 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1891 &clk_sel_val);
1892 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1893 &Data);
1894 if (status < 0) {
1895 dbg("reading spreg failed in set_serial_baud");
1896 return -1;
1897 }
1898 Data = (Data & 0x8f) | clk_sel_val;
1899 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1900 Data);
1901 if (status < 0) {
1902 dbg("Writing spreg failed in set_serial_baud");
1903 return -1;
1904 }
1905 /* Calculate the Divisor */
1906
1907 if (status) {
1908 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1909 return status;
1910 }
1911 /* Enable access to divisor latch */
1912 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1913 mos7840_port->shadowLCR = Data;
1914 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1915
1916 /* Write the divisor */
1917 Data = (unsigned char)(divisor & 0xff);
1918 dbg("set_serial_baud Value to write DLL is %x", Data);
1919 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1920
1921 Data = (unsigned char)((divisor & 0xff00) >> 8);
1922 dbg("set_serial_baud Value to write DLM is %x", Data);
1923 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1924
1925 /* Disable access to divisor latch */
1926 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1927 mos7840_port->shadowLCR = Data;
1928 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1929
1930 }
1931 return status;
1932 }
1933
1934 /*****************************************************************************
1935 * mos7840_change_port_settings
1936 * This routine is called to set the UART on the device to match
1937 * the specified new settings.
1938 *****************************************************************************/
1939
1940 static void mos7840_change_port_settings(struct tty_struct *tty,
1941 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1942 {
1943 int baud;
1944 unsigned cflag;
1945 unsigned iflag;
1946 __u8 lData;
1947 __u8 lParity;
1948 __u8 lStop;
1949 int status;
1950 __u16 Data;
1951 struct usb_serial_port *port;
1952 struct usb_serial *serial;
1953
1954 if (mos7840_port == NULL)
1955 return;
1956
1957 port = (struct usb_serial_port *)mos7840_port->port;
1958
1959 if (mos7840_port_paranoia_check(port, __func__)) {
1960 dbg("%s", "Invalid port");
1961 return;
1962 }
1963
1964 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1965 dbg("%s", "Invalid Serial");
1966 return;
1967 }
1968
1969 serial = port->serial;
1970
1971 dbg("%s - port %d", __func__, mos7840_port->port->number);
1972
1973 if (!mos7840_port->open) {
1974 dbg("%s - port not opened", __func__);
1975 return;
1976 }
1977
1978 lData = LCR_BITS_8;
1979 lStop = LCR_STOP_1;
1980 lParity = LCR_PAR_NONE;
1981
1982 cflag = tty->termios->c_cflag;
1983 iflag = tty->termios->c_iflag;
1984
1985 /* Change the number of bits */
1986 if (cflag & CSIZE) {
1987 switch (cflag & CSIZE) {
1988 case CS5:
1989 lData = LCR_BITS_5;
1990 break;
1991
1992 case CS6:
1993 lData = LCR_BITS_6;
1994 break;
1995
1996 case CS7:
1997 lData = LCR_BITS_7;
1998 break;
1999 default:
2000 case CS8:
2001 lData = LCR_BITS_8;
2002 break;
2003 }
2004 }
2005 /* Change the Parity bit */
2006 if (cflag & PARENB) {
2007 if (cflag & PARODD) {
2008 lParity = LCR_PAR_ODD;
2009 dbg("%s - parity = odd", __func__);
2010 } else {
2011 lParity = LCR_PAR_EVEN;
2012 dbg("%s - parity = even", __func__);
2013 }
2014
2015 } else {
2016 dbg("%s - parity = none", __func__);
2017 }
2018
2019 if (cflag & CMSPAR)
2020 lParity = lParity | 0x20;
2021
2022 /* Change the Stop bit */
2023 if (cflag & CSTOPB) {
2024 lStop = LCR_STOP_2;
2025 dbg("%s - stop bits = 2", __func__);
2026 } else {
2027 lStop = LCR_STOP_1;
2028 dbg("%s - stop bits = 1", __func__);
2029 }
2030
2031 /* Update the LCR with the correct value */
2032 mos7840_port->shadowLCR &=
2033 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2034 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2035
2036 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2037 mos7840_port->shadowLCR);
2038 /* Disable Interrupts */
2039 Data = 0x00;
2040 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2041
2042 Data = 0x00;
2043 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2044
2045 Data = 0xcf;
2046 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2047
2048 /* Send the updated LCR value to the mos7840 */
2049 Data = mos7840_port->shadowLCR;
2050
2051 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2052
2053 Data = 0x00b;
2054 mos7840_port->shadowMCR = Data;
2055 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2056 Data = 0x00b;
2057 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2058
2059 /* set up the MCR register and send it to the mos7840 */
2060
2061 mos7840_port->shadowMCR = MCR_MASTER_IE;
2062 if (cflag & CBAUD)
2063 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2064
2065 if (cflag & CRTSCTS)
2066 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2067 else
2068 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2069
2070 Data = mos7840_port->shadowMCR;
2071 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2072
2073 /* Determine divisor based on baud rate */
2074 baud = tty_get_baud_rate(tty);
2075
2076 if (!baud) {
2077 /* pick a default, any default... */
2078 dbg("%s", "Picked default baud...");
2079 baud = 9600;
2080 }
2081
2082 dbg("%s - baud rate = %d", __func__, baud);
2083 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2084
2085 /* Enable Interrupts */
2086 Data = 0x0c;
2087 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2088
2089 if (mos7840_port->read_urb_busy == false) {
2090 mos7840_port->read_urb_busy = true;
2091 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2092 if (status) {
2093 dbg("usb_submit_urb(read bulk) failed, status = %d",
2094 status);
2095 mos7840_port->read_urb_busy = false;
2096 }
2097 }
2098 wake_up(&mos7840_port->delta_msr_wait);
2099 mos7840_port->delta_msr_cond = 1;
2100 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2101 mos7840_port->shadowLCR);
2102 }
2103
2104 /*****************************************************************************
2105 * mos7840_set_termios
2106 * this function is called by the tty driver when it wants to change
2107 * the termios structure
2108 *****************************************************************************/
2109
2110 static void mos7840_set_termios(struct tty_struct *tty,
2111 struct usb_serial_port *port,
2112 struct ktermios *old_termios)
2113 {
2114 int status;
2115 unsigned int cflag;
2116 struct usb_serial *serial;
2117 struct moschip_port *mos7840_port;
2118
2119 if (mos7840_port_paranoia_check(port, __func__)) {
2120 dbg("%s", "Invalid port");
2121 return;
2122 }
2123
2124 serial = port->serial;
2125
2126 if (mos7840_serial_paranoia_check(serial, __func__)) {
2127 dbg("%s", "Invalid Serial");
2128 return;
2129 }
2130
2131 mos7840_port = mos7840_get_port_private(port);
2132
2133 if (mos7840_port == NULL)
2134 return;
2135
2136 if (!mos7840_port->open) {
2137 dbg("%s - port not opened", __func__);
2138 return;
2139 }
2140
2141 dbg("%s", "setting termios - ");
2142
2143 cflag = tty->termios->c_cflag;
2144
2145 dbg("%s - clfag %08x iflag %08x", __func__,
2146 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2147 dbg("%s - old clfag %08x old iflag %08x", __func__,
2148 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2149 dbg("%s - port %d", __func__, port->number);
2150
2151 /* change the port settings to the new ones specified */
2152
2153 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2154
2155 if (!mos7840_port->read_urb) {
2156 dbg("%s", "URB KILLED !!!!!");
2157 return;
2158 }
2159
2160 if (mos7840_port->read_urb_busy == false) {
2161 mos7840_port->read_urb_busy = true;
2162 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2163 if (status) {
2164 dbg("usb_submit_urb(read bulk) failed, status = %d",
2165 status);
2166 mos7840_port->read_urb_busy = false;
2167 }
2168 }
2169 }
2170
2171 /*****************************************************************************
2172 * mos7840_get_lsr_info - get line status register info
2173 *
2174 * Purpose: Let user call ioctl() to get info when the UART physically
2175 * is emptied. On bus types like RS485, the transmitter must
2176 * release the bus after transmitting. This must be done when
2177 * the transmit shift register is empty, not be done when the
2178 * transmit holding register is empty. This functionality
2179 * allows an RS485 driver to be written in user space.
2180 *****************************************************************************/
2181
2182 static int mos7840_get_lsr_info(struct tty_struct *tty,
2183 unsigned int __user *value)
2184 {
2185 int count;
2186 unsigned int result = 0;
2187
2188 count = mos7840_chars_in_buffer(tty);
2189 if (count == 0) {
2190 dbg("%s -- Empty", __func__);
2191 result = TIOCSER_TEMT;
2192 }
2193
2194 if (copy_to_user(value, &result, sizeof(int)))
2195 return -EFAULT;
2196 return 0;
2197 }
2198
2199 /*****************************************************************************
2200 * mos7840_get_serial_info
2201 * function to get information about serial port
2202 *****************************************************************************/
2203
2204 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2205 struct serial_struct __user *retinfo)
2206 {
2207 struct serial_struct tmp;
2208
2209 if (mos7840_port == NULL)
2210 return -1;
2211
2212 if (!retinfo)
2213 return -EFAULT;
2214
2215 memset(&tmp, 0, sizeof(tmp));
2216
2217 tmp.type = PORT_16550A;
2218 tmp.line = mos7840_port->port->serial->minor;
2219 tmp.port = mos7840_port->port->number;
2220 tmp.irq = 0;
2221 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2222 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2223 tmp.baud_base = 9600;
2224 tmp.close_delay = 5 * HZ;
2225 tmp.closing_wait = 30 * HZ;
2226
2227 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2228 return -EFAULT;
2229 return 0;
2230 }
2231
2232 static int mos7840_get_icount(struct tty_struct *tty,
2233 struct serial_icounter_struct *icount)
2234 {
2235 struct usb_serial_port *port = tty->driver_data;
2236 struct moschip_port *mos7840_port;
2237 struct async_icount cnow;
2238
2239 mos7840_port = mos7840_get_port_private(port);
2240 cnow = mos7840_port->icount;
2241
2242 smp_rmb();
2243 icount->cts = cnow.cts;
2244 icount->dsr = cnow.dsr;
2245 icount->rng = cnow.rng;
2246 icount->dcd = cnow.dcd;
2247 icount->rx = cnow.rx;
2248 icount->tx = cnow.tx;
2249 icount->frame = cnow.frame;
2250 icount->overrun = cnow.overrun;
2251 icount->parity = cnow.parity;
2252 icount->brk = cnow.brk;
2253 icount->buf_overrun = cnow.buf_overrun;
2254
2255 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2256 port->number, icount->rx, icount->tx);
2257 return 0;
2258 }
2259
2260 /*****************************************************************************
2261 * SerialIoctl
2262 * this function handles any ioctl calls to the driver
2263 *****************************************************************************/
2264
2265 static int mos7840_ioctl(struct tty_struct *tty,
2266 unsigned int cmd, unsigned long arg)
2267 {
2268 struct usb_serial_port *port = tty->driver_data;
2269 void __user *argp = (void __user *)arg;
2270 struct moschip_port *mos7840_port;
2271
2272 struct async_icount cnow;
2273 struct async_icount cprev;
2274
2275 if (mos7840_port_paranoia_check(port, __func__)) {
2276 dbg("%s", "Invalid port");
2277 return -1;
2278 }
2279
2280 mos7840_port = mos7840_get_port_private(port);
2281
2282 if (mos7840_port == NULL)
2283 return -1;
2284
2285 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2286
2287 switch (cmd) {
2288 /* return number of bytes available */
2289
2290 case TIOCSERGETLSR:
2291 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2292 return mos7840_get_lsr_info(tty, argp);
2293
2294 case TIOCGSERIAL:
2295 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2296 return mos7840_get_serial_info(mos7840_port, argp);
2297
2298 case TIOCSSERIAL:
2299 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2300 break;
2301
2302 case TIOCMIWAIT:
2303 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2304 cprev = mos7840_port->icount;
2305 while (1) {
2306 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2307 mos7840_port->delta_msr_cond = 0;
2308 wait_event_interruptible(mos7840_port->delta_msr_wait,
2309 (mos7840_port->
2310 delta_msr_cond == 1));
2311
2312 /* see if a signal did it */
2313 if (signal_pending(current))
2314 return -ERESTARTSYS;
2315 cnow = mos7840_port->icount;
2316 smp_rmb();
2317 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2318 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2319 return -EIO; /* no change => error */
2320 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2321 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2322 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2323 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2324 return 0;
2325 }
2326 cprev = cnow;
2327 }
2328 /* NOTREACHED */
2329 break;
2330
2331 default:
2332 break;
2333 }
2334 return -ENOIOCTLCMD;
2335 }
2336
2337 static int mos7810_check(struct usb_serial *serial)
2338 {
2339 int i, pass_count = 0;
2340 __u16 data = 0, mcr_data = 0;
2341 __u16 test_pattern = 0x55AA;
2342
2343 /* Store MCR setting */
2344 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2345 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2346 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2347
2348 for (i = 0; i < 16; i++) {
2349 /* Send the 1-bit test pattern out to MCS7810 test pin */
2350 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2351 MCS_WRREQ, MCS_WR_RTYPE,
2352 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2353 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2354
2355 /* Read the test pattern back */
2356 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2357 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2358 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2359
2360 /* If this is a MCS7810 device, both test patterns must match */
2361 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2362 break;
2363
2364 pass_count++;
2365 }
2366
2367 /* Restore MCR setting */
2368 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2369 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2370 0, MOS_WDR_TIMEOUT);
2371
2372 if (pass_count == 16)
2373 return 1;
2374
2375 return 0;
2376 }
2377
2378 static int mos7840_calc_num_ports(struct usb_serial *serial)
2379 {
2380 __u16 data = 0x00;
2381 int mos7840_num_ports;
2382
2383 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2384 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2385 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2386
2387 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2388 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2389 device_type = serial->dev->descriptor.idProduct;
2390 } else {
2391 /* For a MCS7840 device GPIO0 must be set to 1 */
2392 if ((data & 0x01) == 1)
2393 device_type = MOSCHIP_DEVICE_ID_7840;
2394 else if (mos7810_check(serial))
2395 device_type = MOSCHIP_DEVICE_ID_7810;
2396 else
2397 device_type = MOSCHIP_DEVICE_ID_7820;
2398 }
2399
2400 mos7840_num_ports = (device_type >> 4) & 0x000F;
2401 serial->num_bulk_in = mos7840_num_ports;
2402 serial->num_bulk_out = mos7840_num_ports;
2403 serial->num_ports = mos7840_num_ports;
2404
2405 return mos7840_num_ports;
2406 }
2407
2408 static int mos7840_port_probe(struct usb_serial_port *port)
2409 {
2410 struct usb_serial *serial = port->serial;
2411 struct moschip_port *mos7840_port;
2412 int status;
2413 int pnum;
2414 __u16 Data;
2415
2416 /* we set up the pointers to the endpoints in the mos7840_open *
2417 * function, as the structures aren't created yet. */
2418
2419 pnum = port->number - serial->minor;
2420
2421 /* FIXME: remove do-while(0) loop used to keep stable patch minimal.
2422 */
2423 do {
2424 dbg("mos7840_startup: configuring port %d............", pnum);
2425 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2426 if (mos7840_port == NULL) {
2427 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2428 return -ENOMEM;
2429 }
2430
2431 /* Initialize all port interrupt end point to port 0 int
2432 * endpoint. Our device has only one interrupt end point
2433 * common to all port */
2434
2435 mos7840_port->port = port;
2436 mos7840_set_port_private(port, mos7840_port);
2437 spin_lock_init(&mos7840_port->pool_lock);
2438
2439 /* minor is not initialised until later by
2440 * usb-serial.c:get_free_serial() and cannot therefore be used
2441 * to index device instances */
2442 mos7840_port->port_num = pnum + 1;
2443 dbg("port->number = %d", port->number);
2444 dbg("port->serial->minor = %d", port->serial->minor);
2445 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2446 dbg ("serial->minor = %d", serial->minor);
2447
2448 if (mos7840_port->port_num == 1) {
2449 mos7840_port->SpRegOffset = 0x0;
2450 mos7840_port->ControlRegOffset = 0x1;
2451 mos7840_port->DcrRegOffset = 0x4;
2452 } else if ((mos7840_port->port_num == 2)
2453 && (serial->num_ports == 4)) {
2454 mos7840_port->SpRegOffset = 0x8;
2455 mos7840_port->ControlRegOffset = 0x9;
2456 mos7840_port->DcrRegOffset = 0x16;
2457 } else if ((mos7840_port->port_num == 2)
2458 && (serial->num_ports == 2)) {
2459 mos7840_port->SpRegOffset = 0xa;
2460 mos7840_port->ControlRegOffset = 0xb;
2461 mos7840_port->DcrRegOffset = 0x19;
2462 } else if ((mos7840_port->port_num == 3)
2463 && (serial->num_ports == 4)) {
2464 mos7840_port->SpRegOffset = 0xa;
2465 mos7840_port->ControlRegOffset = 0xb;
2466 mos7840_port->DcrRegOffset = 0x19;
2467 } else if ((mos7840_port->port_num == 4)
2468 && (serial->num_ports == 4)) {
2469 mos7840_port->SpRegOffset = 0xc;
2470 mos7840_port->ControlRegOffset = 0xd;
2471 mos7840_port->DcrRegOffset = 0x1c;
2472 }
2473 mos7840_dump_serial_port(mos7840_port);
2474 mos7840_set_port_private(port, mos7840_port);
2475
2476 /* enable rx_disable bit in control register */
2477 status = mos7840_get_reg_sync(port,
2478 mos7840_port->ControlRegOffset, &Data);
2479 if (status < 0) {
2480 dbg("Reading ControlReg failed status-0x%x", status);
2481 break;
2482 } else
2483 dbg("ControlReg Reading success val is %x, status%d",
2484 Data, status);
2485
2486 Data |= 0x08; /* setting driver done bit */
2487 Data |= 0x04; /* sp1_bit to have cts change reflect in
2488 modem status reg */
2489
2490 /* Data |= 0x20; //rx_disable bit */
2491 status = mos7840_set_reg_sync(port,
2492 mos7840_port->ControlRegOffset, Data);
2493 if (status < 0) {
2494 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2495 break;
2496 } else
2497 dbg("ControlReg Writing success(rx_disable) status%d",
2498 status);
2499
2500 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2501 and 0x24 in DCR3 */
2502 Data = 0x01;
2503 status = mos7840_set_reg_sync(port,
2504 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2505 if (status < 0) {
2506 dbg("Writing DCR0 failed status-0x%x", status);
2507 break;
2508 } else
2509 dbg("DCR0 Writing success status%d", status);
2510
2511 Data = 0x05;
2512 status = mos7840_set_reg_sync(port,
2513 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2514 if (status < 0) {
2515 dbg("Writing DCR1 failed status-0x%x", status);
2516 break;
2517 } else
2518 dbg("DCR1 Writing success status%d", status);
2519
2520 Data = 0x24;
2521 status = mos7840_set_reg_sync(port,
2522 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2523 if (status < 0) {
2524 dbg("Writing DCR2 failed status-0x%x", status);
2525 break;
2526 } else
2527 dbg("DCR2 Writing success status%d", status);
2528
2529 /* write values in clkstart0x0 and clkmulti 0x20 */
2530 Data = 0x0;
2531 status = mos7840_set_reg_sync(port,
2532 CLK_START_VALUE_REGISTER, Data);
2533 if (status < 0) {
2534 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2535 break;
2536 } else
2537 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2538
2539 Data = 0x20;
2540 status = mos7840_set_reg_sync(port,
2541 CLK_MULTI_REGISTER, Data);
2542 if (status < 0) {
2543 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2544 status);
2545 goto error;
2546 } else
2547 dbg("CLK_MULTI_REGISTER Writing success status%d",
2548 status);
2549
2550 /* write value 0x0 to scratchpad register */
2551 Data = 0x00;
2552 status = mos7840_set_uart_reg(port,
2553 SCRATCH_PAD_REGISTER, Data);
2554 if (status < 0) {
2555 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2556 status);
2557 break;
2558 } else
2559 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2560 status);
2561
2562 /* Zero Length flag register */
2563 if ((mos7840_port->port_num != 1)
2564 && (serial->num_ports == 2)) {
2565
2566 Data = 0xff;
2567 status = mos7840_set_reg_sync(port,
2568 (__u16) (ZLP_REG1 +
2569 ((__u16)mos7840_port->port_num)), Data);
2570 dbg("ZLIP offset %x",
2571 (__u16) (ZLP_REG1 +
2572 ((__u16) mos7840_port->port_num)));
2573 if (status < 0) {
2574 dbg("Writing ZLP_REG%d failed status-0x%x",
2575 pnum + 2, status);
2576 break;
2577 } else
2578 dbg("ZLP_REG%d Writing success status%d",
2579 pnum + 2, status);
2580 } else {
2581 Data = 0xff;
2582 status = mos7840_set_reg_sync(port,
2583 (__u16) (ZLP_REG1 +
2584 ((__u16)mos7840_port->port_num) - 0x1), Data);
2585 dbg("ZLIP offset %x",
2586 (__u16) (ZLP_REG1 +
2587 ((__u16) mos7840_port->port_num) - 0x1));
2588 if (status < 0) {
2589 dbg("Writing ZLP_REG%d failed status-0x%x",
2590 pnum + 1, status);
2591 break;
2592 } else
2593 dbg("ZLP_REG%d Writing success status%d",
2594 pnum + 1, status);
2595
2596 }
2597 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2598 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2599 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2600 GFP_KERNEL);
2601 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2602 !mos7840_port->dr) {
2603 status = -ENOMEM;
2604 goto error;
2605 }
2606
2607 mos7840_port->has_led = false;
2608
2609 /* Initialize LED timers */
2610 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2611 mos7840_port->has_led = true;
2612
2613 init_timer(&mos7840_port->led_timer1);
2614 mos7840_port->led_timer1.function = mos7840_led_off;
2615 mos7840_port->led_timer1.expires =
2616 jiffies + msecs_to_jiffies(LED_ON_MS);
2617 mos7840_port->led_timer1.data =
2618 (unsigned long)mos7840_port;
2619
2620 init_timer(&mos7840_port->led_timer2);
2621 mos7840_port->led_timer2.function =
2622 mos7840_led_flag_off;
2623 mos7840_port->led_timer2.expires =
2624 jiffies + msecs_to_jiffies(LED_OFF_MS);
2625 mos7840_port->led_timer2.data =
2626 (unsigned long)mos7840_port;
2627
2628 mos7840_port->led_flag = false;
2629
2630 /* Turn off LED */
2631 mos7840_set_led_sync(port,
2632 MODEM_CONTROL_REGISTER, 0x0300);
2633 }
2634 } while (0);
2635
2636 if (pnum == serial->num_ports - 1) {
2637 dbg("mos7840_startup: all ports configured...........");
2638
2639 /* Zero Length flag enable */
2640 Data = 0x0f;
2641 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2642 if (status < 0) {
2643 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2644 goto error;
2645 } else
2646 dbg("ZLP_REG5 Writing success status%d", status);
2647
2648 /* setting configuration feature to one */
2649 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2650 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2651 MOS_WDR_TIMEOUT);
2652 }
2653 return 0;
2654 error:
2655 kfree(mos7840_port->dr);
2656 kfree(mos7840_port->ctrl_buf);
2657 usb_free_urb(mos7840_port->control_urb);
2658 kfree(mos7840_port);
2659
2660 return status;
2661 }
2662
2663 static int mos7840_port_remove(struct usb_serial_port *port)
2664 {
2665 struct moschip_port *mos7840_port;
2666
2667 mos7840_port = mos7840_get_port_private(port);
2668
2669 if (mos7840_port->has_led) {
2670 /* Turn off LED */
2671 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2672
2673 del_timer_sync(&mos7840_port->led_timer1);
2674 del_timer_sync(&mos7840_port->led_timer2);
2675 }
2676 usb_kill_urb(mos7840_port->control_urb);
2677 usb_free_urb(mos7840_port->control_urb);
2678 kfree(mos7840_port->ctrl_buf);
2679 kfree(mos7840_port->dr);
2680 kfree(mos7840_port);
2681
2682 return 0;
2683 }
2684
2685 static struct usb_serial_driver moschip7840_4port_device = {
2686 .driver = {
2687 .owner = THIS_MODULE,
2688 .name = "mos7840",
2689 },
2690 .description = DRIVER_DESC,
2691 .id_table = id_table,
2692 .num_ports = 4,
2693 .open = mos7840_open,
2694 .close = mos7840_close,
2695 .write = mos7840_write,
2696 .write_room = mos7840_write_room,
2697 .chars_in_buffer = mos7840_chars_in_buffer,
2698 .throttle = mos7840_throttle,
2699 .unthrottle = mos7840_unthrottle,
2700 .calc_num_ports = mos7840_calc_num_ports,
2701 #ifdef MCSSerialProbe
2702 .probe = mos7840_serial_probe,
2703 #endif
2704 .ioctl = mos7840_ioctl,
2705 .set_termios = mos7840_set_termios,
2706 .break_ctl = mos7840_break,
2707 .tiocmget = mos7840_tiocmget,
2708 .tiocmset = mos7840_tiocmset,
2709 .get_icount = mos7840_get_icount,
2710 .port_probe = mos7840_port_probe,
2711 .port_remove = mos7840_port_remove,
2712 .read_bulk_callback = mos7840_bulk_in_callback,
2713 .read_int_callback = mos7840_interrupt_callback,
2714 };
2715
2716 static struct usb_serial_driver * const serial_drivers[] = {
2717 &moschip7840_4port_device, NULL
2718 };
2719
2720 module_usb_serial_driver(serial_drivers, id_table);
2721
2722 MODULE_DESCRIPTION(DRIVER_DESC);
2723 MODULE_LICENSE("GPL");
2724
2725 module_param(debug, bool, S_IRUGO | S_IWUSR);
2726 MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux ARM platform port for MOXA ART SoC