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USB: mos7840: remove smp barriers from icount handling
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/tty.h>
30 #include <linux/tty_driver.h>
31 #include <linux/tty_flip.h>
32 #include <linux/module.h>
33 #include <linux/serial.h>
34 #include <linux/usb.h>
35 #include <linux/usb/serial.h>
36 #include <linux/uaccess.h>
37
38 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
39
40 /*
41 * 16C50 UART register defines
42 */
43
44 #define LCR_BITS_5 0x00 /* 5 bits/char */
45 #define LCR_BITS_6 0x01 /* 6 bits/char */
46 #define LCR_BITS_7 0x02 /* 7 bits/char */
47 #define LCR_BITS_8 0x03 /* 8 bits/char */
48 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
49
50 #define LCR_STOP_1 0x00 /* 1 stop bit */
51 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
52 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
53 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
54
55 #define LCR_PAR_NONE 0x00 /* No parity */
56 #define LCR_PAR_ODD 0x08 /* Odd parity */
57 #define LCR_PAR_EVEN 0x18 /* Even parity */
58 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
59 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
60 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
61
62 #define LCR_SET_BREAK 0x40 /* Set Break condition */
63 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
64
65 #define MCR_DTR 0x01 /* Assert DTR */
66 #define MCR_RTS 0x02 /* Assert RTS */
67 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
68 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
69 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
70 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
71
72 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
73 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
74 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
75 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
76
77 /*
78 * Defines used for sending commands to port
79 */
80
81 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
82
83 #define MOS_PORT1 0x0200
84 #define MOS_PORT2 0x0300
85 #define MOS_VENREG 0x0000
86 #define MOS_MAX_PORT 0x02
87 #define MOS_WRITE 0x0E
88 #define MOS_READ 0x0D
89
90 /* Requests */
91 #define MCS_RD_RTYPE 0xC0
92 #define MCS_WR_RTYPE 0x40
93 #define MCS_RDREQ 0x0D
94 #define MCS_WRREQ 0x0E
95 #define MCS_CTRL_TIMEOUT 500
96 #define VENDOR_READ_LENGTH (0x01)
97
98 #define MAX_NAME_LEN 64
99
100 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
101 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
102
103 /* For higher baud Rates use TIOCEXBAUD */
104 #define TIOCEXBAUD 0x5462
105
106 /* vendor id and device id defines */
107
108 /* The native mos7840/7820 component */
109 #define USB_VENDOR_ID_MOSCHIP 0x9710
110 #define MOSCHIP_DEVICE_ID_7840 0x7840
111 #define MOSCHIP_DEVICE_ID_7820 0x7820
112 #define MOSCHIP_DEVICE_ID_7810 0x7810
113 /* The native component can have its vendor/device id's overridden
114 * in vendor-specific implementations. Such devices can be handled
115 * by making a change here, in id_table.
116 */
117 #define USB_VENDOR_ID_BANDB 0x0856
118 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
119 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
120 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
121 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
122 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
123 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
124 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
125 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
126 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
127 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
128 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
129 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
130 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
131
132 /* This driver also supports
133 * ATEN UC2324 device using Moschip MCS7840
134 * ATEN UC2322 device using Moschip MCS7820
135 */
136 #define USB_VENDOR_ID_ATENINTL 0x0557
137 #define ATENINTL_DEVICE_ID_UC2324 0x2011
138 #define ATENINTL_DEVICE_ID_UC2322 0x7820
139
140 /* Interrupt Routine Defines */
141
142 #define SERIAL_IIR_RLS 0x06
143 #define SERIAL_IIR_MS 0x00
144
145 /*
146 * Emulation of the bit mask on the LINE STATUS REGISTER.
147 */
148 #define SERIAL_LSR_DR 0x0001
149 #define SERIAL_LSR_OE 0x0002
150 #define SERIAL_LSR_PE 0x0004
151 #define SERIAL_LSR_FE 0x0008
152 #define SERIAL_LSR_BI 0x0010
153
154 #define MOS_MSR_DELTA_CTS 0x10
155 #define MOS_MSR_DELTA_DSR 0x20
156 #define MOS_MSR_DELTA_RI 0x40
157 #define MOS_MSR_DELTA_CD 0x80
158
159 /* Serial Port register Address */
160 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
161 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
162 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
163 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
164 #define LINE_STATUS_REGISTER ((__u16)(0x05))
165 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
166 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
167 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
168 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
169
170 #define CLK_MULTI_REGISTER ((__u16)(0x02))
171 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
172 #define GPIO_REGISTER ((__u16)(0x07))
173
174 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
175
176 /*
177 * URB POOL related defines
178 */
179 #define NUM_URBS 16 /* URB Count */
180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181
182 /* LED on/off milliseconds*/
183 #define LED_ON_MS 500
184 #define LED_OFF_MS 500
185
186 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 if (new_msr & MOS_MSR_DELTA_DSR)
412 icount->dsr++;
413 if (new_msr & MOS_MSR_DELTA_CD)
414 icount->dcd++;
415 if (new_msr & MOS_MSR_DELTA_RI)
416 icount->rng++;
417
418 mos7840_port->delta_msr_cond = 1;
419 wake_up_interruptible(&port->port->delta_msr_wait);
420 }
421 }
422
423 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
424 {
425 struct async_icount *icount;
426
427 if (new_lsr & SERIAL_LSR_BI) {
428 /*
429 * Parity and Framing errors only count if they
430 * occur exclusive of a break being
431 * received.
432 */
433 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
434 }
435
436 /* update input line counters */
437 icount = &port->icount;
438 if (new_lsr & SERIAL_LSR_BI)
439 icount->brk++;
440 if (new_lsr & SERIAL_LSR_OE)
441 icount->overrun++;
442 if (new_lsr & SERIAL_LSR_PE)
443 icount->parity++;
444 if (new_lsr & SERIAL_LSR_FE)
445 icount->frame++;
446 }
447
448 /************************************************************************/
449 /************************************************************************/
450 /* U S B C A L L B A C K F U N C T I O N S */
451 /* U S B C A L L B A C K F U N C T I O N S */
452 /************************************************************************/
453 /************************************************************************/
454
455 static void mos7840_control_callback(struct urb *urb)
456 {
457 unsigned char *data;
458 struct moschip_port *mos7840_port;
459 struct device *dev = &urb->dev->dev;
460 __u8 regval = 0x0;
461 int status = urb->status;
462
463 mos7840_port = urb->context;
464
465 switch (status) {
466 case 0:
467 /* success */
468 break;
469 case -ECONNRESET:
470 case -ENOENT:
471 case -ESHUTDOWN:
472 /* this urb is terminated, clean up */
473 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
474 return;
475 default:
476 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
477 return;
478 }
479
480 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
481 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
482 mos7840_port->MsrLsr, mos7840_port->port_num);
483 data = urb->transfer_buffer;
484 regval = (__u8) data[0];
485 dev_dbg(dev, "%s data is %x\n", __func__, regval);
486 if (mos7840_port->MsrLsr == 0)
487 mos7840_handle_new_msr(mos7840_port, regval);
488 else if (mos7840_port->MsrLsr == 1)
489 mos7840_handle_new_lsr(mos7840_port, regval);
490 }
491
492 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
493 __u16 *val)
494 {
495 struct usb_device *dev = mcs->port->serial->dev;
496 struct usb_ctrlrequest *dr = mcs->dr;
497 unsigned char *buffer = mcs->ctrl_buf;
498 int ret;
499
500 dr->bRequestType = MCS_RD_RTYPE;
501 dr->bRequest = MCS_RDREQ;
502 dr->wValue = cpu_to_le16(Wval); /* 0 */
503 dr->wIndex = cpu_to_le16(reg);
504 dr->wLength = cpu_to_le16(2);
505
506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
507 (unsigned char *)dr, buffer, 2,
508 mos7840_control_callback, mcs);
509 mcs->control_urb->transfer_buffer_length = 2;
510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
511 return ret;
512 }
513
514 static void mos7840_set_led_callback(struct urb *urb)
515 {
516 switch (urb->status) {
517 case 0:
518 /* Success */
519 break;
520 case -ECONNRESET:
521 case -ENOENT:
522 case -ESHUTDOWN:
523 /* This urb is terminated, clean up */
524 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
525 __func__, urb->status);
526 break;
527 default:
528 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
529 __func__, urb->status);
530 }
531 }
532
533 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
534 __u16 reg)
535 {
536 struct usb_device *dev = mcs->port->serial->dev;
537 struct usb_ctrlrequest *dr = mcs->dr;
538
539 dr->bRequestType = MCS_WR_RTYPE;
540 dr->bRequest = MCS_WRREQ;
541 dr->wValue = cpu_to_le16(wval);
542 dr->wIndex = cpu_to_le16(reg);
543 dr->wLength = cpu_to_le16(0);
544
545 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
546 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
547
548 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
549 }
550
551 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
552 __u16 val)
553 {
554 struct usb_device *dev = port->serial->dev;
555
556 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
557 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
558 }
559
560 static void mos7840_led_off(unsigned long arg)
561 {
562 struct moschip_port *mcs = (struct moschip_port *) arg;
563
564 /* Turn off LED */
565 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
566 mod_timer(&mcs->led_timer2,
567 jiffies + msecs_to_jiffies(LED_OFF_MS));
568 }
569
570 static void mos7840_led_flag_off(unsigned long arg)
571 {
572 struct moschip_port *mcs = (struct moschip_port *) arg;
573
574 mcs->led_flag = false;
575 }
576
577 /*****************************************************************************
578 * mos7840_interrupt_callback
579 * this is the callback function for when we have received data on the
580 * interrupt endpoint.
581 *****************************************************************************/
582
583 static void mos7840_interrupt_callback(struct urb *urb)
584 {
585 int result;
586 int length;
587 struct moschip_port *mos7840_port;
588 struct usb_serial *serial;
589 __u16 Data;
590 unsigned char *data;
591 __u8 sp[5], st;
592 int i, rv = 0;
593 __u16 wval, wreg = 0;
594 int status = urb->status;
595
596 switch (status) {
597 case 0:
598 /* success */
599 break;
600 case -ECONNRESET:
601 case -ENOENT:
602 case -ESHUTDOWN:
603 /* this urb is terminated, clean up */
604 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
605 __func__, status);
606 return;
607 default:
608 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
609 __func__, status);
610 goto exit;
611 }
612
613 length = urb->actual_length;
614 data = urb->transfer_buffer;
615
616 serial = urb->context;
617
618 /* Moschip get 5 bytes
619 * Byte 1 IIR Port 1 (port.number is 0)
620 * Byte 2 IIR Port 2 (port.number is 1)
621 * Byte 3 IIR Port 3 (port.number is 2)
622 * Byte 4 IIR Port 4 (port.number is 3)
623 * Byte 5 FIFO status for both */
624
625 if (length && length > 5) {
626 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
627 return;
628 }
629
630 sp[0] = (__u8) data[0];
631 sp[1] = (__u8) data[1];
632 sp[2] = (__u8) data[2];
633 sp[3] = (__u8) data[3];
634 st = (__u8) data[4];
635
636 for (i = 0; i < serial->num_ports; i++) {
637 mos7840_port = mos7840_get_port_private(serial->port[i]);
638 wval =
639 (((__u16) serial->port[i]->number -
640 (__u16) (serial->minor)) + 1) << 8;
641 if (mos7840_port->open) {
642 if (sp[i] & 0x01) {
643 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
644 } else {
645 switch (sp[i] & 0x0f) {
646 case SERIAL_IIR_RLS:
647 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
648 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
649 mos7840_port->MsrLsr = 1;
650 wreg = LINE_STATUS_REGISTER;
651 break;
652 case SERIAL_IIR_MS:
653 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
654 mos7840_port->MsrLsr = 0;
655 wreg = MODEM_STATUS_REGISTER;
656 break;
657 }
658 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
659 }
660 }
661 }
662 if (!(rv < 0))
663 /* the completion handler for the control urb will resubmit */
664 return;
665 exit:
666 result = usb_submit_urb(urb, GFP_ATOMIC);
667 if (result) {
668 dev_err(&urb->dev->dev,
669 "%s - Error %d submitting interrupt urb\n",
670 __func__, result);
671 }
672 }
673
674 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
675 const char *function)
676 {
677 if (!port) {
678 pr_debug("%s - port == NULL\n", function);
679 return -1;
680 }
681 if (!port->serial) {
682 pr_debug("%s - port->serial == NULL\n", function);
683 return -1;
684 }
685
686 return 0;
687 }
688
689 /* Inline functions to check the sanity of a pointer that is passed to us */
690 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
691 const char *function)
692 {
693 if (!serial) {
694 pr_debug("%s - serial == NULL\n", function);
695 return -1;
696 }
697 if (!serial->type) {
698 pr_debug("%s - serial->type == NULL!\n", function);
699 return -1;
700 }
701
702 return 0;
703 }
704
705 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
706 const char *function)
707 {
708 /* if no port was specified, or it fails a paranoia check */
709 if (!port ||
710 mos7840_port_paranoia_check(port, function) ||
711 mos7840_serial_paranoia_check(port->serial, function)) {
712 /* then say that we don't have a valid usb_serial thing,
713 * which will end up genrating -ENODEV return values */
714 return NULL;
715 }
716
717 return port->serial;
718 }
719
720 /*****************************************************************************
721 * mos7840_bulk_in_callback
722 * this is the callback function for when we have received data on the
723 * bulk in endpoint.
724 *****************************************************************************/
725
726 static void mos7840_bulk_in_callback(struct urb *urb)
727 {
728 int retval;
729 unsigned char *data;
730 struct usb_serial *serial;
731 struct usb_serial_port *port;
732 struct moschip_port *mos7840_port;
733 int status = urb->status;
734
735 mos7840_port = urb->context;
736 if (!mos7840_port)
737 return;
738
739 if (status) {
740 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
741 mos7840_port->read_urb_busy = false;
742 return;
743 }
744
745 port = mos7840_port->port;
746 if (mos7840_port_paranoia_check(port, __func__)) {
747 mos7840_port->read_urb_busy = false;
748 return;
749 }
750
751 serial = mos7840_get_usb_serial(port, __func__);
752 if (!serial) {
753 mos7840_port->read_urb_busy = false;
754 return;
755 }
756
757 data = urb->transfer_buffer;
758 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
759
760 if (urb->actual_length) {
761 struct tty_port *tport = &mos7840_port->port->port;
762 tty_insert_flip_string(tport, data, urb->actual_length);
763 tty_flip_buffer_push(tport);
764 mos7840_port->icount.rx += urb->actual_length;
765 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
766 }
767
768 if (!mos7840_port->read_urb) {
769 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
770 mos7840_port->read_urb_busy = false;
771 return;
772 }
773
774 /* Turn on LED */
775 if (mos7840_port->has_led && !mos7840_port->led_flag) {
776 mos7840_port->led_flag = true;
777 mos7840_set_led_async(mos7840_port, 0x0301,
778 MODEM_CONTROL_REGISTER);
779 mod_timer(&mos7840_port->led_timer1,
780 jiffies + msecs_to_jiffies(LED_ON_MS));
781 }
782
783 mos7840_port->read_urb_busy = true;
784 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
785
786 if (retval) {
787 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
788 mos7840_port->read_urb_busy = false;
789 }
790 }
791
792 /*****************************************************************************
793 * mos7840_bulk_out_data_callback
794 * this is the callback function for when we have finished sending
795 * serial data on the bulk out endpoint.
796 *****************************************************************************/
797
798 static void mos7840_bulk_out_data_callback(struct urb *urb)
799 {
800 struct moschip_port *mos7840_port;
801 struct usb_serial_port *port;
802 struct tty_struct *tty;
803 int status = urb->status;
804 int i;
805
806 mos7840_port = urb->context;
807 port = mos7840_port->port;
808 spin_lock(&mos7840_port->pool_lock);
809 for (i = 0; i < NUM_URBS; i++) {
810 if (urb == mos7840_port->write_urb_pool[i]) {
811 mos7840_port->busy[i] = 0;
812 break;
813 }
814 }
815 spin_unlock(&mos7840_port->pool_lock);
816
817 if (status) {
818 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
819 return;
820 }
821
822 if (mos7840_port_paranoia_check(port, __func__))
823 return;
824
825 tty = tty_port_tty_get(&port->port);
826 if (tty && mos7840_port->open)
827 tty_wakeup(tty);
828 tty_kref_put(tty);
829
830 }
831
832 /************************************************************************/
833 /* 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 */
834 /************************************************************************/
835 #ifdef MCSSerialProbe
836 static int mos7840_serial_probe(struct usb_serial *serial,
837 const struct usb_device_id *id)
838 {
839
840 /*need to implement the mode_reg reading and updating\
841 structures usb_serial_ device_type\
842 (i.e num_ports, num_bulkin,bulkout etc) */
843 /* Also we can update the changes attach */
844 return 1;
845 }
846 #endif
847
848 /*****************************************************************************
849 * mos7840_open
850 * this function is called by the tty driver when a port is opened
851 * If successful, we return 0
852 * Otherwise we return a negative error number.
853 *****************************************************************************/
854
855 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
856 {
857 int response;
858 int j;
859 struct usb_serial *serial;
860 struct urb *urb;
861 __u16 Data;
862 int status;
863 struct moschip_port *mos7840_port;
864 struct moschip_port *port0;
865
866 if (mos7840_port_paranoia_check(port, __func__))
867 return -ENODEV;
868
869 serial = port->serial;
870
871 if (mos7840_serial_paranoia_check(serial, __func__))
872 return -ENODEV;
873
874 mos7840_port = mos7840_get_port_private(port);
875 port0 = mos7840_get_port_private(serial->port[0]);
876
877 if (mos7840_port == NULL || port0 == NULL)
878 return -ENODEV;
879
880 usb_clear_halt(serial->dev, port->write_urb->pipe);
881 usb_clear_halt(serial->dev, port->read_urb->pipe);
882 port0->open_ports++;
883
884 /* Initialising the write urb pool */
885 for (j = 0; j < NUM_URBS; ++j) {
886 urb = usb_alloc_urb(0, GFP_KERNEL);
887 mos7840_port->write_urb_pool[j] = urb;
888
889 if (urb == NULL) {
890 dev_err(&port->dev, "No more urbs???\n");
891 continue;
892 }
893
894 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
895 GFP_KERNEL);
896 if (!urb->transfer_buffer) {
897 usb_free_urb(urb);
898 mos7840_port->write_urb_pool[j] = NULL;
899 dev_err(&port->dev,
900 "%s-out of memory for urb buffers.\n",
901 __func__);
902 continue;
903 }
904 }
905
906 /*****************************************************************************
907 * Initialize MCS7840 -- Write Init values to corresponding Registers
908 *
909 * Register Index
910 * 1 : IER
911 * 2 : FCR
912 * 3 : LCR
913 * 4 : MCR
914 *
915 * 0x08 : SP1/2 Control Reg
916 *****************************************************************************/
917
918 /* NEED to check the following Block */
919
920 Data = 0x0;
921 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
922 if (status < 0) {
923 dev_dbg(&port->dev, "Reading Spreg failed\n");
924 return -1;
925 }
926 Data |= 0x80;
927 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
928 if (status < 0) {
929 dev_dbg(&port->dev, "writing Spreg failed\n");
930 return -1;
931 }
932
933 Data &= ~0x80;
934 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
935 if (status < 0) {
936 dev_dbg(&port->dev, "writing Spreg failed\n");
937 return -1;
938 }
939 /* End of block to be checked */
940
941 Data = 0x0;
942 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
943 &Data);
944 if (status < 0) {
945 dev_dbg(&port->dev, "Reading Controlreg failed\n");
946 return -1;
947 }
948 Data |= 0x08; /* Driver done bit */
949 Data |= 0x20; /* rx_disable */
950 status = mos7840_set_reg_sync(port,
951 mos7840_port->ControlRegOffset, Data);
952 if (status < 0) {
953 dev_dbg(&port->dev, "writing Controlreg failed\n");
954 return -1;
955 }
956 /* do register settings here */
957 /* Set all regs to the device default values. */
958 /***********************************
959 * First Disable all interrupts.
960 ***********************************/
961 Data = 0x00;
962 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
963 if (status < 0) {
964 dev_dbg(&port->dev, "disabling interrupts failed\n");
965 return -1;
966 }
967 /* Set FIFO_CONTROL_REGISTER to the default value */
968 Data = 0x00;
969 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
970 if (status < 0) {
971 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
972 return -1;
973 }
974
975 Data = 0xcf;
976 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
977 if (status < 0) {
978 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
979 return -1;
980 }
981
982 Data = 0x03;
983 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
984 mos7840_port->shadowLCR = Data;
985
986 Data = 0x0b;
987 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
988 mos7840_port->shadowMCR = Data;
989
990 Data = 0x00;
991 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
992 mos7840_port->shadowLCR = Data;
993
994 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
995 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
996
997 Data = 0x0c;
998 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
999
1000 Data = 0x0;
1001 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1002
1003 Data = 0x00;
1004 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1005
1006 Data = Data & ~SERIAL_LCR_DLAB;
1007 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1008 mos7840_port->shadowLCR = Data;
1009
1010 /* clearing Bulkin and Bulkout Fifo */
1011 Data = 0x0;
1012 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1013
1014 Data = Data | 0x0c;
1015 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1016
1017 Data = Data & ~0x0c;
1018 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1019 /* Finally enable all interrupts */
1020 Data = 0x0c;
1021 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1022
1023 /* clearing rx_disable */
1024 Data = 0x0;
1025 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1026 &Data);
1027 Data = Data & ~0x20;
1028 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1029 Data);
1030
1031 /* rx_negate */
1032 Data = 0x0;
1033 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1034 &Data);
1035 Data = Data | 0x10;
1036 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1037 Data);
1038
1039 /* Check to see if we've set up our endpoint info yet *
1040 * (can't set it up in mos7840_startup as the structures *
1041 * were not set up at that time.) */
1042 if (port0->open_ports == 1) {
1043 if (serial->port[0]->interrupt_in_buffer == NULL) {
1044 /* set up interrupt urb */
1045 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1046 serial->dev,
1047 usb_rcvintpipe(serial->dev,
1048 serial->port[0]->interrupt_in_endpointAddress),
1049 serial->port[0]->interrupt_in_buffer,
1050 serial->port[0]->interrupt_in_urb->
1051 transfer_buffer_length,
1052 mos7840_interrupt_callback,
1053 serial,
1054 serial->port[0]->interrupt_in_urb->interval);
1055
1056 /* start interrupt read for mos7840 *
1057 * will continue as long as mos7840 is connected */
1058
1059 response =
1060 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1061 GFP_KERNEL);
1062 if (response) {
1063 dev_err(&port->dev, "%s - Error %d submitting "
1064 "interrupt urb\n", __func__, response);
1065 }
1066
1067 }
1068
1069 }
1070
1071 /* see if we've set up our endpoint info yet *
1072 * (can't set it up in mos7840_startup as the *
1073 * structures were not set up at that time.) */
1074
1075 dev_dbg(&port->dev, "port number is %d\n", port->number);
1076 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1077 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1078 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1079 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1080 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1081 mos7840_port->read_urb = port->read_urb;
1082
1083 /* set up our bulk in urb */
1084 if ((serial->num_ports == 2)
1085 && ((((__u16)port->number -
1086 (__u16)(port->serial->minor)) % 2) != 0)) {
1087 usb_fill_bulk_urb(mos7840_port->read_urb,
1088 serial->dev,
1089 usb_rcvbulkpipe(serial->dev,
1090 (port->bulk_in_endpointAddress) + 2),
1091 port->bulk_in_buffer,
1092 mos7840_port->read_urb->transfer_buffer_length,
1093 mos7840_bulk_in_callback, mos7840_port);
1094 } else {
1095 usb_fill_bulk_urb(mos7840_port->read_urb,
1096 serial->dev,
1097 usb_rcvbulkpipe(serial->dev,
1098 port->bulk_in_endpointAddress),
1099 port->bulk_in_buffer,
1100 mos7840_port->read_urb->transfer_buffer_length,
1101 mos7840_bulk_in_callback, mos7840_port);
1102 }
1103
1104 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1105 mos7840_port->read_urb_busy = true;
1106 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1107 if (response) {
1108 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1109 __func__, response);
1110 mos7840_port->read_urb_busy = false;
1111 }
1112
1113 /* initialize our wait queues */
1114 init_waitqueue_head(&mos7840_port->wait_chase);
1115
1116 /* initialize our icount structure */
1117 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1118
1119 /* initialize our port settings */
1120 /* Must set to enable ints! */
1121 mos7840_port->shadowMCR = MCR_MASTER_IE;
1122 /* send a open port command */
1123 mos7840_port->open = 1;
1124 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1125 mos7840_port->icount.tx = 0;
1126 mos7840_port->icount.rx = 0;
1127
1128 return 0;
1129 }
1130
1131 /*****************************************************************************
1132 * mos7840_chars_in_buffer
1133 * this function is called by the tty driver when it wants to know how many
1134 * bytes of data we currently have outstanding in the port (data that has
1135 * been written, but hasn't made it out the port yet)
1136 * If successful, we return the number of bytes left to be written in the
1137 * system,
1138 * Otherwise we return zero.
1139 *****************************************************************************/
1140
1141 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1142 {
1143 struct usb_serial_port *port = tty->driver_data;
1144 int i;
1145 int chars = 0;
1146 unsigned long flags;
1147 struct moschip_port *mos7840_port;
1148
1149 if (mos7840_port_paranoia_check(port, __func__))
1150 return 0;
1151
1152 mos7840_port = mos7840_get_port_private(port);
1153 if (mos7840_port == NULL)
1154 return 0;
1155
1156 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1157 for (i = 0; i < NUM_URBS; ++i) {
1158 if (mos7840_port->busy[i]) {
1159 struct urb *urb = mos7840_port->write_urb_pool[i];
1160 chars += urb->transfer_buffer_length;
1161 }
1162 }
1163 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1164 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1165 return chars;
1166
1167 }
1168
1169 /*****************************************************************************
1170 * mos7840_close
1171 * this function is called by the tty driver when a port is closed
1172 *****************************************************************************/
1173
1174 static void mos7840_close(struct usb_serial_port *port)
1175 {
1176 struct usb_serial *serial;
1177 struct moschip_port *mos7840_port;
1178 struct moschip_port *port0;
1179 int j;
1180 __u16 Data;
1181
1182 if (mos7840_port_paranoia_check(port, __func__))
1183 return;
1184
1185 serial = mos7840_get_usb_serial(port, __func__);
1186 if (!serial)
1187 return;
1188
1189 mos7840_port = mos7840_get_port_private(port);
1190 port0 = mos7840_get_port_private(serial->port[0]);
1191
1192 if (mos7840_port == NULL || port0 == NULL)
1193 return;
1194
1195 for (j = 0; j < NUM_URBS; ++j)
1196 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1197
1198 /* Freeing Write URBs */
1199 for (j = 0; j < NUM_URBS; ++j) {
1200 if (mos7840_port->write_urb_pool[j]) {
1201 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1202 kfree(mos7840_port->write_urb_pool[j]->
1203 transfer_buffer);
1204
1205 usb_free_urb(mos7840_port->write_urb_pool[j]);
1206 }
1207 }
1208
1209 usb_kill_urb(mos7840_port->write_urb);
1210 usb_kill_urb(mos7840_port->read_urb);
1211 mos7840_port->read_urb_busy = false;
1212
1213 port0->open_ports--;
1214 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
1215 if (port0->open_ports == 0) {
1216 if (serial->port[0]->interrupt_in_urb) {
1217 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1218 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1219 }
1220 }
1221
1222 if (mos7840_port->write_urb) {
1223 /* if this urb had a transfer buffer already (old tx) free it */
1224 kfree(mos7840_port->write_urb->transfer_buffer);
1225 usb_free_urb(mos7840_port->write_urb);
1226 }
1227
1228 Data = 0x0;
1229 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1230
1231 Data = 0x00;
1232 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1233
1234 mos7840_port->open = 0;
1235 }
1236
1237 /************************************************************************
1238 *
1239 * mos7840_block_until_chase_response
1240 *
1241 * This function will block the close until one of the following:
1242 * 1. Response to our Chase comes from mos7840
1243 * 2. A timeout of 10 seconds without activity has expired
1244 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1245 *
1246 ************************************************************************/
1247
1248 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1249 struct moschip_port *mos7840_port)
1250 {
1251 int timeout = msecs_to_jiffies(1000);
1252 int wait = 10;
1253 int count;
1254
1255 while (1) {
1256 count = mos7840_chars_in_buffer(tty);
1257
1258 /* Check for Buffer status */
1259 if (count <= 0)
1260 return;
1261
1262 /* Block the thread for a while */
1263 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1264 timeout);
1265 /* No activity.. count down section */
1266 wait--;
1267 if (wait == 0) {
1268 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
1269 return;
1270 } else {
1271 /* Reset timeout value back to seconds */
1272 wait = 10;
1273 }
1274 }
1275
1276 }
1277
1278 /*****************************************************************************
1279 * mos7840_break
1280 * this function sends a break to the port
1281 *****************************************************************************/
1282 static void mos7840_break(struct tty_struct *tty, int break_state)
1283 {
1284 struct usb_serial_port *port = tty->driver_data;
1285 unsigned char data;
1286 struct usb_serial *serial;
1287 struct moschip_port *mos7840_port;
1288
1289 if (mos7840_port_paranoia_check(port, __func__))
1290 return;
1291
1292 serial = mos7840_get_usb_serial(port, __func__);
1293 if (!serial)
1294 return;
1295
1296 mos7840_port = mos7840_get_port_private(port);
1297
1298 if (mos7840_port == NULL)
1299 return;
1300
1301 /* flush and block until tx is empty */
1302 mos7840_block_until_chase_response(tty, mos7840_port);
1303
1304 if (break_state == -1)
1305 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1306 else
1307 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1308
1309 /* FIXME: no locking on shadowLCR anywhere in driver */
1310 mos7840_port->shadowLCR = data;
1311 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1312 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1313 mos7840_port->shadowLCR);
1314 }
1315
1316 /*****************************************************************************
1317 * mos7840_write_room
1318 * this function is called by the tty driver when it wants to know how many
1319 * bytes of data we can accept for a specific port.
1320 * If successful, we return the amount of room that we have for this port
1321 * Otherwise we return a negative error number.
1322 *****************************************************************************/
1323
1324 static int mos7840_write_room(struct tty_struct *tty)
1325 {
1326 struct usb_serial_port *port = tty->driver_data;
1327 int i;
1328 int room = 0;
1329 unsigned long flags;
1330 struct moschip_port *mos7840_port;
1331
1332 if (mos7840_port_paranoia_check(port, __func__))
1333 return -1;
1334
1335 mos7840_port = mos7840_get_port_private(port);
1336 if (mos7840_port == NULL)
1337 return -1;
1338
1339 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1340 for (i = 0; i < NUM_URBS; ++i) {
1341 if (!mos7840_port->busy[i])
1342 room += URB_TRANSFER_BUFFER_SIZE;
1343 }
1344 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1345
1346 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1347 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1348 return room;
1349
1350 }
1351
1352 /*****************************************************************************
1353 * mos7840_write
1354 * this function is called by the tty driver when data should be written to
1355 * the port.
1356 * If successful, we return the number of bytes written, otherwise we
1357 * return a negative error number.
1358 *****************************************************************************/
1359
1360 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1361 const unsigned char *data, int count)
1362 {
1363 int status;
1364 int i;
1365 int bytes_sent = 0;
1366 int transfer_size;
1367 unsigned long flags;
1368
1369 struct moschip_port *mos7840_port;
1370 struct usb_serial *serial;
1371 struct urb *urb;
1372 /* __u16 Data; */
1373 const unsigned char *current_position = data;
1374 unsigned char *data1;
1375
1376 #ifdef NOTMOS7840
1377 Data = 0x00;
1378 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1379 mos7840_port->shadowLCR = Data;
1380 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1381 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1382
1383 /* Data = 0x03; */
1384 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1385 /* mos7840_port->shadowLCR=Data;//Need to add later */
1386
1387 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1388 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1389
1390 /* Data = 0x0c; */
1391 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1392 Data = 0x00;
1393 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1394 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1395
1396 Data = 0x0;
1397 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1398 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1399
1400 Data = Data & ~SERIAL_LCR_DLAB;
1401 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1402 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1403 #endif
1404
1405 if (mos7840_port_paranoia_check(port, __func__))
1406 return -1;
1407
1408 serial = port->serial;
1409 if (mos7840_serial_paranoia_check(serial, __func__))
1410 return -1;
1411
1412 mos7840_port = mos7840_get_port_private(port);
1413 if (mos7840_port == NULL)
1414 return -1;
1415
1416 /* try to find a free urb in the list */
1417 urb = NULL;
1418
1419 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1420 for (i = 0; i < NUM_URBS; ++i) {
1421 if (!mos7840_port->busy[i]) {
1422 mos7840_port->busy[i] = 1;
1423 urb = mos7840_port->write_urb_pool[i];
1424 dev_dbg(&port->dev, "URB:%d\n", i);
1425 break;
1426 }
1427 }
1428 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1429
1430 if (urb == NULL) {
1431 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1432 goto exit;
1433 }
1434
1435 if (urb->transfer_buffer == NULL) {
1436 urb->transfer_buffer =
1437 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1438
1439 if (urb->transfer_buffer == NULL) {
1440 dev_err_console(port, "%s no more kernel memory...\n",
1441 __func__);
1442 goto exit;
1443 }
1444 }
1445 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1446
1447 memcpy(urb->transfer_buffer, current_position, transfer_size);
1448
1449 /* fill urb with data and submit */
1450 if ((serial->num_ports == 2)
1451 && ((((__u16)port->number -
1452 (__u16)(port->serial->minor)) % 2) != 0)) {
1453 usb_fill_bulk_urb(urb,
1454 serial->dev,
1455 usb_sndbulkpipe(serial->dev,
1456 (port->bulk_out_endpointAddress) + 2),
1457 urb->transfer_buffer,
1458 transfer_size,
1459 mos7840_bulk_out_data_callback, mos7840_port);
1460 } else {
1461 usb_fill_bulk_urb(urb,
1462 serial->dev,
1463 usb_sndbulkpipe(serial->dev,
1464 port->bulk_out_endpointAddress),
1465 urb->transfer_buffer,
1466 transfer_size,
1467 mos7840_bulk_out_data_callback, mos7840_port);
1468 }
1469
1470 data1 = urb->transfer_buffer;
1471 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1472
1473 /* Turn on LED */
1474 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1475 mos7840_port->led_flag = true;
1476 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1477 mod_timer(&mos7840_port->led_timer1,
1478 jiffies + msecs_to_jiffies(LED_ON_MS));
1479 }
1480
1481 /* send it down the pipe */
1482 status = usb_submit_urb(urb, GFP_ATOMIC);
1483
1484 if (status) {
1485 mos7840_port->busy[i] = 0;
1486 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1487 "with status = %d\n", __func__, status);
1488 bytes_sent = status;
1489 goto exit;
1490 }
1491 bytes_sent = transfer_size;
1492 mos7840_port->icount.tx += transfer_size;
1493 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1494 exit:
1495 return bytes_sent;
1496
1497 }
1498
1499 /*****************************************************************************
1500 * mos7840_throttle
1501 * this function is called by the tty driver when it wants to stop the data
1502 * being read from the port.
1503 *****************************************************************************/
1504
1505 static void mos7840_throttle(struct tty_struct *tty)
1506 {
1507 struct usb_serial_port *port = tty->driver_data;
1508 struct moschip_port *mos7840_port;
1509 int status;
1510
1511 if (mos7840_port_paranoia_check(port, __func__))
1512 return;
1513
1514 mos7840_port = mos7840_get_port_private(port);
1515
1516 if (mos7840_port == NULL)
1517 return;
1518
1519 if (!mos7840_port->open) {
1520 dev_dbg(&port->dev, "%s", "port not opened\n");
1521 return;
1522 }
1523
1524 /* if we are implementing XON/XOFF, send the stop character */
1525 if (I_IXOFF(tty)) {
1526 unsigned char stop_char = STOP_CHAR(tty);
1527 status = mos7840_write(tty, port, &stop_char, 1);
1528 if (status <= 0)
1529 return;
1530 }
1531 /* if we are implementing RTS/CTS, toggle that line */
1532 if (tty->termios.c_cflag & CRTSCTS) {
1533 mos7840_port->shadowMCR &= ~MCR_RTS;
1534 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1535 mos7840_port->shadowMCR);
1536 if (status < 0)
1537 return;
1538 }
1539 }
1540
1541 /*****************************************************************************
1542 * mos7840_unthrottle
1543 * this function is called by the tty driver when it wants to resume
1544 * the data being read from the port (called after mos7840_throttle is
1545 * called)
1546 *****************************************************************************/
1547 static void mos7840_unthrottle(struct tty_struct *tty)
1548 {
1549 struct usb_serial_port *port = tty->driver_data;
1550 int status;
1551 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1552
1553 if (mos7840_port_paranoia_check(port, __func__))
1554 return;
1555
1556 if (mos7840_port == NULL)
1557 return;
1558
1559 if (!mos7840_port->open) {
1560 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1561 return;
1562 }
1563
1564 /* if we are implementing XON/XOFF, send the start character */
1565 if (I_IXOFF(tty)) {
1566 unsigned char start_char = START_CHAR(tty);
1567 status = mos7840_write(tty, port, &start_char, 1);
1568 if (status <= 0)
1569 return;
1570 }
1571
1572 /* if we are implementing RTS/CTS, toggle that line */
1573 if (tty->termios.c_cflag & CRTSCTS) {
1574 mos7840_port->shadowMCR |= MCR_RTS;
1575 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1576 mos7840_port->shadowMCR);
1577 if (status < 0)
1578 return;
1579 }
1580 }
1581
1582 static int mos7840_tiocmget(struct tty_struct *tty)
1583 {
1584 struct usb_serial_port *port = tty->driver_data;
1585 struct moschip_port *mos7840_port;
1586 unsigned int result;
1587 __u16 msr;
1588 __u16 mcr;
1589 int status;
1590 mos7840_port = mos7840_get_port_private(port);
1591
1592 if (mos7840_port == NULL)
1593 return -ENODEV;
1594
1595 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1596 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1597 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1598 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1599 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1600 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1601 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1602 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1603 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1604
1605 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1606
1607 return result;
1608 }
1609
1610 static int mos7840_tiocmset(struct tty_struct *tty,
1611 unsigned int set, unsigned int clear)
1612 {
1613 struct usb_serial_port *port = tty->driver_data;
1614 struct moschip_port *mos7840_port;
1615 unsigned int mcr;
1616 int status;
1617
1618 mos7840_port = mos7840_get_port_private(port);
1619
1620 if (mos7840_port == NULL)
1621 return -ENODEV;
1622
1623 /* FIXME: What locks the port registers ? */
1624 mcr = mos7840_port->shadowMCR;
1625 if (clear & TIOCM_RTS)
1626 mcr &= ~MCR_RTS;
1627 if (clear & TIOCM_DTR)
1628 mcr &= ~MCR_DTR;
1629 if (clear & TIOCM_LOOP)
1630 mcr &= ~MCR_LOOPBACK;
1631
1632 if (set & TIOCM_RTS)
1633 mcr |= MCR_RTS;
1634 if (set & TIOCM_DTR)
1635 mcr |= MCR_DTR;
1636 if (set & TIOCM_LOOP)
1637 mcr |= MCR_LOOPBACK;
1638
1639 mos7840_port->shadowMCR = mcr;
1640
1641 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1642 if (status < 0) {
1643 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1644 return status;
1645 }
1646
1647 return 0;
1648 }
1649
1650 /*****************************************************************************
1651 * mos7840_calc_baud_rate_divisor
1652 * this function calculates the proper baud rate divisor for the specified
1653 * baud rate.
1654 *****************************************************************************/
1655 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1656 int baudRate, int *divisor,
1657 __u16 *clk_sel_val)
1658 {
1659 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1660
1661 if (baudRate <= 115200) {
1662 *divisor = 115200 / baudRate;
1663 *clk_sel_val = 0x0;
1664 }
1665 if ((baudRate > 115200) && (baudRate <= 230400)) {
1666 *divisor = 230400 / baudRate;
1667 *clk_sel_val = 0x10;
1668 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1669 *divisor = 403200 / baudRate;
1670 *clk_sel_val = 0x20;
1671 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1672 *divisor = 460800 / baudRate;
1673 *clk_sel_val = 0x30;
1674 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1675 *divisor = 806400 / baudRate;
1676 *clk_sel_val = 0x40;
1677 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1678 *divisor = 921600 / baudRate;
1679 *clk_sel_val = 0x50;
1680 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1681 *divisor = 1572864 / baudRate;
1682 *clk_sel_val = 0x60;
1683 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1684 *divisor = 3145728 / baudRate;
1685 *clk_sel_val = 0x70;
1686 }
1687 return 0;
1688
1689 #ifdef NOTMCS7840
1690
1691 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1692 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1693 *divisor = mos7840_divisor_table[i].Divisor;
1694 return 0;
1695 }
1696 }
1697
1698 /* After trying for all the standard baud rates *
1699 * Try calculating the divisor for this baud rate */
1700
1701 if (baudrate > 75 && baudrate < 230400) {
1702 /* get the divisor */
1703 custom = (__u16) (230400L / baudrate);
1704
1705 /* Check for round off */
1706 round1 = (__u16) (2304000L / baudrate);
1707 round = (__u16) (round1 - (custom * 10));
1708 if (round > 4)
1709 custom++;
1710 *divisor = custom;
1711
1712 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1713 return 0;
1714 }
1715
1716 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1717 return -1;
1718 #endif
1719 }
1720
1721 /*****************************************************************************
1722 * mos7840_send_cmd_write_baud_rate
1723 * this function sends the proper command to change the baud rate of the
1724 * specified port.
1725 *****************************************************************************/
1726
1727 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1728 int baudRate)
1729 {
1730 int divisor = 0;
1731 int status;
1732 __u16 Data;
1733 unsigned char number;
1734 __u16 clk_sel_val;
1735 struct usb_serial_port *port;
1736
1737 if (mos7840_port == NULL)
1738 return -1;
1739
1740 port = mos7840_port->port;
1741 if (mos7840_port_paranoia_check(port, __func__))
1742 return -1;
1743
1744 if (mos7840_serial_paranoia_check(port->serial, __func__))
1745 return -1;
1746
1747 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1748
1749 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1750 mos7840_port->port->number, baudRate);
1751 /* reset clk_uart_sel in spregOffset */
1752 if (baudRate > 115200) {
1753 #ifdef HW_flow_control
1754 /* NOTE: need to see the pther register to modify */
1755 /* setting h/w flow control bit to 1 */
1756 Data = 0x2b;
1757 mos7840_port->shadowMCR = Data;
1758 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1759 Data);
1760 if (status < 0) {
1761 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1762 return -1;
1763 }
1764 #endif
1765
1766 } else {
1767 #ifdef HW_flow_control
1768 /* setting h/w flow control bit to 0 */
1769 Data = 0xb;
1770 mos7840_port->shadowMCR = Data;
1771 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1772 Data);
1773 if (status < 0) {
1774 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1775 return -1;
1776 }
1777 #endif
1778
1779 }
1780
1781 if (1) { /* baudRate <= 115200) */
1782 clk_sel_val = 0x0;
1783 Data = 0x0;
1784 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1785 &clk_sel_val);
1786 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1787 &Data);
1788 if (status < 0) {
1789 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1790 return -1;
1791 }
1792 Data = (Data & 0x8f) | clk_sel_val;
1793 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1794 Data);
1795 if (status < 0) {
1796 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1797 return -1;
1798 }
1799 /* Calculate the Divisor */
1800
1801 if (status) {
1802 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1803 return status;
1804 }
1805 /* Enable access to divisor latch */
1806 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1807 mos7840_port->shadowLCR = Data;
1808 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1809
1810 /* Write the divisor */
1811 Data = (unsigned char)(divisor & 0xff);
1812 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1813 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1814
1815 Data = (unsigned char)((divisor & 0xff00) >> 8);
1816 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1817 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1818
1819 /* Disable access to divisor latch */
1820 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1821 mos7840_port->shadowLCR = Data;
1822 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1823
1824 }
1825 return status;
1826 }
1827
1828 /*****************************************************************************
1829 * mos7840_change_port_settings
1830 * This routine is called to set the UART on the device to match
1831 * the specified new settings.
1832 *****************************************************************************/
1833
1834 static void mos7840_change_port_settings(struct tty_struct *tty,
1835 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1836 {
1837 int baud;
1838 unsigned cflag;
1839 unsigned iflag;
1840 __u8 lData;
1841 __u8 lParity;
1842 __u8 lStop;
1843 int status;
1844 __u16 Data;
1845 struct usb_serial_port *port;
1846 struct usb_serial *serial;
1847
1848 if (mos7840_port == NULL)
1849 return;
1850
1851 port = mos7840_port->port;
1852
1853 if (mos7840_port_paranoia_check(port, __func__))
1854 return;
1855
1856 if (mos7840_serial_paranoia_check(port->serial, __func__))
1857 return;
1858
1859 serial = port->serial;
1860
1861 if (!mos7840_port->open) {
1862 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1863 return;
1864 }
1865
1866 lData = LCR_BITS_8;
1867 lStop = LCR_STOP_1;
1868 lParity = LCR_PAR_NONE;
1869
1870 cflag = tty->termios.c_cflag;
1871 iflag = tty->termios.c_iflag;
1872
1873 /* Change the number of bits */
1874 if (cflag & CSIZE) {
1875 switch (cflag & CSIZE) {
1876 case CS5:
1877 lData = LCR_BITS_5;
1878 break;
1879
1880 case CS6:
1881 lData = LCR_BITS_6;
1882 break;
1883
1884 case CS7:
1885 lData = LCR_BITS_7;
1886 break;
1887 default:
1888 case CS8:
1889 lData = LCR_BITS_8;
1890 break;
1891 }
1892 }
1893 /* Change the Parity bit */
1894 if (cflag & PARENB) {
1895 if (cflag & PARODD) {
1896 lParity = LCR_PAR_ODD;
1897 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1898 } else {
1899 lParity = LCR_PAR_EVEN;
1900 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1901 }
1902
1903 } else {
1904 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1905 }
1906
1907 if (cflag & CMSPAR)
1908 lParity = lParity | 0x20;
1909
1910 /* Change the Stop bit */
1911 if (cflag & CSTOPB) {
1912 lStop = LCR_STOP_2;
1913 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1914 } else {
1915 lStop = LCR_STOP_1;
1916 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1917 }
1918
1919 /* Update the LCR with the correct value */
1920 mos7840_port->shadowLCR &=
1921 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1922 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1923
1924 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1925 mos7840_port->shadowLCR);
1926 /* Disable Interrupts */
1927 Data = 0x00;
1928 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1929
1930 Data = 0x00;
1931 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1932
1933 Data = 0xcf;
1934 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1935
1936 /* Send the updated LCR value to the mos7840 */
1937 Data = mos7840_port->shadowLCR;
1938
1939 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1940
1941 Data = 0x00b;
1942 mos7840_port->shadowMCR = Data;
1943 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1944 Data = 0x00b;
1945 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1946
1947 /* set up the MCR register and send it to the mos7840 */
1948
1949 mos7840_port->shadowMCR = MCR_MASTER_IE;
1950 if (cflag & CBAUD)
1951 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1952
1953 if (cflag & CRTSCTS)
1954 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1955 else
1956 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1957
1958 Data = mos7840_port->shadowMCR;
1959 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1960
1961 /* Determine divisor based on baud rate */
1962 baud = tty_get_baud_rate(tty);
1963
1964 if (!baud) {
1965 /* pick a default, any default... */
1966 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1967 baud = 9600;
1968 }
1969
1970 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1971 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1972
1973 /* Enable Interrupts */
1974 Data = 0x0c;
1975 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1976
1977 if (mos7840_port->read_urb_busy == false) {
1978 mos7840_port->read_urb_busy = true;
1979 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1980 if (status) {
1981 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1982 status);
1983 mos7840_port->read_urb_busy = false;
1984 }
1985 }
1986 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1987 mos7840_port->shadowLCR);
1988 }
1989
1990 /*****************************************************************************
1991 * mos7840_set_termios
1992 * this function is called by the tty driver when it wants to change
1993 * the termios structure
1994 *****************************************************************************/
1995
1996 static void mos7840_set_termios(struct tty_struct *tty,
1997 struct usb_serial_port *port,
1998 struct ktermios *old_termios)
1999 {
2000 int status;
2001 unsigned int cflag;
2002 struct usb_serial *serial;
2003 struct moschip_port *mos7840_port;
2004
2005 if (mos7840_port_paranoia_check(port, __func__))
2006 return;
2007
2008 serial = port->serial;
2009
2010 if (mos7840_serial_paranoia_check(serial, __func__))
2011 return;
2012
2013 mos7840_port = mos7840_get_port_private(port);
2014
2015 if (mos7840_port == NULL)
2016 return;
2017
2018 if (!mos7840_port->open) {
2019 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
2020 return;
2021 }
2022
2023 dev_dbg(&port->dev, "%s", "setting termios - \n");
2024
2025 cflag = tty->termios.c_cflag;
2026
2027 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2028 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
2029 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2030 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2031 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
2032
2033 /* change the port settings to the new ones specified */
2034
2035 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2036
2037 if (!mos7840_port->read_urb) {
2038 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
2039 return;
2040 }
2041
2042 if (mos7840_port->read_urb_busy == false) {
2043 mos7840_port->read_urb_busy = true;
2044 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2045 if (status) {
2046 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2047 status);
2048 mos7840_port->read_urb_busy = false;
2049 }
2050 }
2051 }
2052
2053 /*****************************************************************************
2054 * mos7840_get_lsr_info - get line status register info
2055 *
2056 * Purpose: Let user call ioctl() to get info when the UART physically
2057 * is emptied. On bus types like RS485, the transmitter must
2058 * release the bus after transmitting. This must be done when
2059 * the transmit shift register is empty, not be done when the
2060 * transmit holding register is empty. This functionality
2061 * allows an RS485 driver to be written in user space.
2062 *****************************************************************************/
2063
2064 static int mos7840_get_lsr_info(struct tty_struct *tty,
2065 unsigned int __user *value)
2066 {
2067 int count;
2068 unsigned int result = 0;
2069
2070 count = mos7840_chars_in_buffer(tty);
2071 if (count == 0)
2072 result = TIOCSER_TEMT;
2073
2074 if (copy_to_user(value, &result, sizeof(int)))
2075 return -EFAULT;
2076 return 0;
2077 }
2078
2079 /*****************************************************************************
2080 * mos7840_get_serial_info
2081 * function to get information about serial port
2082 *****************************************************************************/
2083
2084 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2085 struct serial_struct __user *retinfo)
2086 {
2087 struct serial_struct tmp;
2088
2089 if (mos7840_port == NULL)
2090 return -1;
2091
2092 if (!retinfo)
2093 return -EFAULT;
2094
2095 memset(&tmp, 0, sizeof(tmp));
2096
2097 tmp.type = PORT_16550A;
2098 tmp.line = mos7840_port->port->serial->minor;
2099 tmp.port = mos7840_port->port->number;
2100 tmp.irq = 0;
2101 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2102 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2103 tmp.baud_base = 9600;
2104 tmp.close_delay = 5 * HZ;
2105 tmp.closing_wait = 30 * HZ;
2106
2107 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2108 return -EFAULT;
2109 return 0;
2110 }
2111
2112 static int mos7840_get_icount(struct tty_struct *tty,
2113 struct serial_icounter_struct *icount)
2114 {
2115 struct usb_serial_port *port = tty->driver_data;
2116 struct moschip_port *mos7840_port;
2117 struct async_icount cnow;
2118 unsigned long flags;
2119
2120 mos7840_port = mos7840_get_port_private(port);
2121
2122 spin_lock_irqsave(&port->lock, flags);
2123 cnow = mos7840_port->icount;
2124 spin_unlock_irqrestore(&port->lock, flags);
2125
2126 icount->cts = cnow.cts;
2127 icount->dsr = cnow.dsr;
2128 icount->rng = cnow.rng;
2129 icount->dcd = cnow.dcd;
2130 icount->rx = cnow.rx;
2131 icount->tx = cnow.tx;
2132 icount->frame = cnow.frame;
2133 icount->overrun = cnow.overrun;
2134 icount->parity = cnow.parity;
2135 icount->brk = cnow.brk;
2136 icount->buf_overrun = cnow.buf_overrun;
2137
2138 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2139 icount->rx, icount->tx);
2140 return 0;
2141 }
2142
2143 /*****************************************************************************
2144 * SerialIoctl
2145 * this function handles any ioctl calls to the driver
2146 *****************************************************************************/
2147
2148 static int mos7840_ioctl(struct tty_struct *tty,
2149 unsigned int cmd, unsigned long arg)
2150 {
2151 struct usb_serial_port *port = tty->driver_data;
2152 void __user *argp = (void __user *)arg;
2153 struct moschip_port *mos7840_port;
2154 unsigned long flags;
2155 struct async_icount cnow;
2156 struct async_icount cprev;
2157
2158 if (mos7840_port_paranoia_check(port, __func__))
2159 return -1;
2160
2161 mos7840_port = mos7840_get_port_private(port);
2162
2163 if (mos7840_port == NULL)
2164 return -1;
2165
2166 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
2167
2168 switch (cmd) {
2169 /* return number of bytes available */
2170
2171 case TIOCSERGETLSR:
2172 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2173 return mos7840_get_lsr_info(tty, argp);
2174
2175 case TIOCGSERIAL:
2176 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2177 return mos7840_get_serial_info(mos7840_port, argp);
2178
2179 case TIOCSSERIAL:
2180 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2181 break;
2182
2183 case TIOCMIWAIT:
2184 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
2185 spin_lock_irqsave(&port->lock, flags);
2186 cprev = mos7840_port->icount;
2187 spin_unlock_irqrestore(&port->lock, flags);
2188 while (1) {
2189 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2190 mos7840_port->delta_msr_cond = 0;
2191 wait_event_interruptible(port->delta_msr_wait,
2192 (port->serial->disconnected ||
2193 mos7840_port->
2194 delta_msr_cond == 1));
2195
2196 /* see if a signal did it */
2197 if (signal_pending(current))
2198 return -ERESTARTSYS;
2199
2200 if (port->serial->disconnected)
2201 return -EIO;
2202
2203 spin_lock_irqsave(&port->lock, flags);
2204 cnow = mos7840_port->icount;
2205 spin_unlock_irqrestore(&port->lock, flags);
2206
2207 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2208 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2209 return -EIO; /* no change => error */
2210
2211 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2212 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2213 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2214 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2215 return 0;
2216 }
2217 cprev = cnow;
2218 }
2219 /* NOTREACHED */
2220 break;
2221
2222 default:
2223 break;
2224 }
2225 return -ENOIOCTLCMD;
2226 }
2227
2228 static int mos7810_check(struct usb_serial *serial)
2229 {
2230 int i, pass_count = 0;
2231 __u16 data = 0, mcr_data = 0;
2232 __u16 test_pattern = 0x55AA;
2233
2234 /* Store MCR setting */
2235 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2236 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2237 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2238
2239 for (i = 0; i < 16; i++) {
2240 /* Send the 1-bit test pattern out to MCS7810 test pin */
2241 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2242 MCS_WRREQ, MCS_WR_RTYPE,
2243 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2244 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2245
2246 /* Read the test pattern back */
2247 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2248 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2249 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2250
2251 /* If this is a MCS7810 device, both test patterns must match */
2252 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2253 break;
2254
2255 pass_count++;
2256 }
2257
2258 /* Restore MCR setting */
2259 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2260 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2261 0, MOS_WDR_TIMEOUT);
2262
2263 if (pass_count == 16)
2264 return 1;
2265
2266 return 0;
2267 }
2268
2269 static int mos7840_calc_num_ports(struct usb_serial *serial)
2270 {
2271 __u16 data = 0x00;
2272 int mos7840_num_ports;
2273
2274 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2275 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2276 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2277
2278 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2279 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2280 device_type = serial->dev->descriptor.idProduct;
2281 } else {
2282 /* For a MCS7840 device GPIO0 must be set to 1 */
2283 if ((data & 0x01) == 1)
2284 device_type = MOSCHIP_DEVICE_ID_7840;
2285 else if (mos7810_check(serial))
2286 device_type = MOSCHIP_DEVICE_ID_7810;
2287 else
2288 device_type = MOSCHIP_DEVICE_ID_7820;
2289 }
2290
2291 mos7840_num_ports = (device_type >> 4) & 0x000F;
2292 serial->num_bulk_in = mos7840_num_ports;
2293 serial->num_bulk_out = mos7840_num_ports;
2294 serial->num_ports = mos7840_num_ports;
2295
2296 return mos7840_num_ports;
2297 }
2298
2299 static int mos7840_port_probe(struct usb_serial_port *port)
2300 {
2301 struct usb_serial *serial = port->serial;
2302 struct moschip_port *mos7840_port;
2303 int status;
2304 int pnum;
2305 __u16 Data;
2306
2307 /* we set up the pointers to the endpoints in the mos7840_open *
2308 * function, as the structures aren't created yet. */
2309
2310 pnum = port->number - serial->minor;
2311
2312 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2313 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2314 if (mos7840_port == NULL) {
2315 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2316 return -ENOMEM;
2317 }
2318
2319 /* Initialize all port interrupt end point to port 0 int
2320 * endpoint. Our device has only one interrupt end point
2321 * common to all port */
2322
2323 mos7840_port->port = port;
2324 mos7840_set_port_private(port, mos7840_port);
2325 spin_lock_init(&mos7840_port->pool_lock);
2326
2327 /* minor is not initialised until later by
2328 * usb-serial.c:get_free_serial() and cannot therefore be used
2329 * to index device instances */
2330 mos7840_port->port_num = pnum + 1;
2331 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2332 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2333 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2334 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2335
2336 if (mos7840_port->port_num == 1) {
2337 mos7840_port->SpRegOffset = 0x0;
2338 mos7840_port->ControlRegOffset = 0x1;
2339 mos7840_port->DcrRegOffset = 0x4;
2340 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2341 mos7840_port->SpRegOffset = 0x8;
2342 mos7840_port->ControlRegOffset = 0x9;
2343 mos7840_port->DcrRegOffset = 0x16;
2344 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2345 mos7840_port->SpRegOffset = 0xa;
2346 mos7840_port->ControlRegOffset = 0xb;
2347 mos7840_port->DcrRegOffset = 0x19;
2348 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2349 mos7840_port->SpRegOffset = 0xa;
2350 mos7840_port->ControlRegOffset = 0xb;
2351 mos7840_port->DcrRegOffset = 0x19;
2352 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2353 mos7840_port->SpRegOffset = 0xc;
2354 mos7840_port->ControlRegOffset = 0xd;
2355 mos7840_port->DcrRegOffset = 0x1c;
2356 }
2357 mos7840_dump_serial_port(port, mos7840_port);
2358 mos7840_set_port_private(port, mos7840_port);
2359
2360 /* enable rx_disable bit in control register */
2361 status = mos7840_get_reg_sync(port,
2362 mos7840_port->ControlRegOffset, &Data);
2363 if (status < 0) {
2364 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2365 goto out;
2366 } else
2367 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2368 Data |= 0x08; /* setting driver done bit */
2369 Data |= 0x04; /* sp1_bit to have cts change reflect in
2370 modem status reg */
2371
2372 /* Data |= 0x20; //rx_disable bit */
2373 status = mos7840_set_reg_sync(port,
2374 mos7840_port->ControlRegOffset, Data);
2375 if (status < 0) {
2376 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2377 goto out;
2378 } else
2379 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2380
2381 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2382 and 0x24 in DCR3 */
2383 Data = 0x01;
2384 status = mos7840_set_reg_sync(port,
2385 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2386 if (status < 0) {
2387 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2388 goto out;
2389 } else
2390 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2391
2392 Data = 0x05;
2393 status = mos7840_set_reg_sync(port,
2394 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2395 if (status < 0) {
2396 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2397 goto out;
2398 } else
2399 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2400
2401 Data = 0x24;
2402 status = mos7840_set_reg_sync(port,
2403 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2404 if (status < 0) {
2405 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2406 goto out;
2407 } else
2408 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2409
2410 /* write values in clkstart0x0 and clkmulti 0x20 */
2411 Data = 0x0;
2412 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2413 if (status < 0) {
2414 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2415 goto out;
2416 } else
2417 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2418
2419 Data = 0x20;
2420 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2421 if (status < 0) {
2422 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2423 goto error;
2424 } else
2425 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2426
2427 /* write value 0x0 to scratchpad register */
2428 Data = 0x00;
2429 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2430 if (status < 0) {
2431 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2432 goto out;
2433 } else
2434 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2435
2436 /* Zero Length flag register */
2437 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2438 Data = 0xff;
2439 status = mos7840_set_reg_sync(port,
2440 (__u16) (ZLP_REG1 +
2441 ((__u16)mos7840_port->port_num)), Data);
2442 dev_dbg(&port->dev, "ZLIP offset %x\n",
2443 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2444 if (status < 0) {
2445 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2446 goto out;
2447 } else
2448 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2449 } else {
2450 Data = 0xff;
2451 status = mos7840_set_reg_sync(port,
2452 (__u16) (ZLP_REG1 +
2453 ((__u16)mos7840_port->port_num) - 0x1), Data);
2454 dev_dbg(&port->dev, "ZLIP offset %x\n",
2455 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2456 if (status < 0) {
2457 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2458 goto out;
2459 } else
2460 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2461
2462 }
2463 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2464 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2465 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2466 GFP_KERNEL);
2467 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2468 !mos7840_port->dr) {
2469 status = -ENOMEM;
2470 goto error;
2471 }
2472
2473 mos7840_port->has_led = false;
2474
2475 /* Initialize LED timers */
2476 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2477 mos7840_port->has_led = true;
2478
2479 init_timer(&mos7840_port->led_timer1);
2480 mos7840_port->led_timer1.function = mos7840_led_off;
2481 mos7840_port->led_timer1.expires =
2482 jiffies + msecs_to_jiffies(LED_ON_MS);
2483 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2484
2485 init_timer(&mos7840_port->led_timer2);
2486 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2487 mos7840_port->led_timer2.expires =
2488 jiffies + msecs_to_jiffies(LED_OFF_MS);
2489 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2490
2491 mos7840_port->led_flag = false;
2492
2493 /* Turn off LED */
2494 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2495 }
2496 out:
2497 if (pnum == serial->num_ports - 1) {
2498 /* Zero Length flag enable */
2499 Data = 0x0f;
2500 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2501 if (status < 0) {
2502 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2503 goto error;
2504 } else
2505 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2506
2507 /* setting configuration feature to one */
2508 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2509 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2510 MOS_WDR_TIMEOUT);
2511 }
2512 return 0;
2513 error:
2514 kfree(mos7840_port->dr);
2515 kfree(mos7840_port->ctrl_buf);
2516 usb_free_urb(mos7840_port->control_urb);
2517 kfree(mos7840_port);
2518
2519 return status;
2520 }
2521
2522 static int mos7840_port_remove(struct usb_serial_port *port)
2523 {
2524 struct moschip_port *mos7840_port;
2525
2526 mos7840_port = mos7840_get_port_private(port);
2527
2528 if (mos7840_port->has_led) {
2529 /* Turn off LED */
2530 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2531
2532 del_timer_sync(&mos7840_port->led_timer1);
2533 del_timer_sync(&mos7840_port->led_timer2);
2534 }
2535 usb_kill_urb(mos7840_port->control_urb);
2536 usb_free_urb(mos7840_port->control_urb);
2537 kfree(mos7840_port->ctrl_buf);
2538 kfree(mos7840_port->dr);
2539 kfree(mos7840_port);
2540
2541 return 0;
2542 }
2543
2544 static struct usb_serial_driver moschip7840_4port_device = {
2545 .driver = {
2546 .owner = THIS_MODULE,
2547 .name = "mos7840",
2548 },
2549 .description = DRIVER_DESC,
2550 .id_table = id_table,
2551 .num_ports = 4,
2552 .open = mos7840_open,
2553 .close = mos7840_close,
2554 .write = mos7840_write,
2555 .write_room = mos7840_write_room,
2556 .chars_in_buffer = mos7840_chars_in_buffer,
2557 .throttle = mos7840_throttle,
2558 .unthrottle = mos7840_unthrottle,
2559 .calc_num_ports = mos7840_calc_num_ports,
2560 #ifdef MCSSerialProbe
2561 .probe = mos7840_serial_probe,
2562 #endif
2563 .ioctl = mos7840_ioctl,
2564 .set_termios = mos7840_set_termios,
2565 .break_ctl = mos7840_break,
2566 .tiocmget = mos7840_tiocmget,
2567 .tiocmset = mos7840_tiocmset,
2568 .get_icount = mos7840_get_icount,
2569 .port_probe = mos7840_port_probe,
2570 .port_remove = mos7840_port_remove,
2571 .read_bulk_callback = mos7840_bulk_in_callback,
2572 .read_int_callback = mos7840_interrupt_callback,
2573 };
2574
2575 static struct usb_serial_driver * const serial_drivers[] = {
2576 &moschip7840_4port_device, NULL
2577 };
2578
2579 module_usb_serial_driver(serial_drivers, id_table);
2580
2581 MODULE_DESCRIPTION(DRIVER_DESC);
2582 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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