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USB: mos7840: remove invalid disconnect handling
[linux/fpc-iii.git] / drivers / usb / serial / mos7840.c
blob0179d348c2608ea7e56cfce2e3a61aaaab7d5614
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 WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
87
88 #define MOS_PORT1 0x0200
89 #define MOS_PORT2 0x0300
90 #define MOS_VENREG 0x0000
91 #define MOS_MAX_PORT 0x02
92 #define MOS_WRITE 0x0E
93 #define MOS_READ 0x0D
94
95 /* Requests */
96 #define MCS_RD_RTYPE 0xC0
97 #define MCS_WR_RTYPE 0x40
98 #define MCS_RDREQ 0x0D
99 #define MCS_WRREQ 0x0E
100 #define MCS_CTRL_TIMEOUT 500
101 #define VENDOR_READ_LENGTH (0x01)
102
103 #define MAX_NAME_LEN 64
104
105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
107
108 /* For higher baud Rates use TIOCEXBAUD */
109 #define TIOCEXBAUD 0x5462
110
111 /* vendor id and device id defines */
112
113 /* The native mos7840/7820 component */
114 #define USB_VENDOR_ID_MOSCHIP 0x9710
115 #define MOSCHIP_DEVICE_ID_7840 0x7840
116 #define MOSCHIP_DEVICE_ID_7820 0x7820
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 moschip_port_id_table, and in
120 * moschip_id_table_combined
121 */
122 #define USB_VENDOR_ID_BANDB 0x0856
123 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
124 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
125 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
126 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
127 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
128 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
129 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
130 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
131 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
132 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
133 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
134 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
135 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
136
137 /* This driver also supports
138 * ATEN UC2324 device using Moschip MCS7840
139 * ATEN UC2322 device using Moschip MCS7820
140 */
141 #define USB_VENDOR_ID_ATENINTL 0x0557
142 #define ATENINTL_DEVICE_ID_UC2324 0x2011
143 #define ATENINTL_DEVICE_ID_UC2322 0x7820
144
145 /* Interrupt Routine Defines */
146
147 #define SERIAL_IIR_RLS 0x06
148 #define SERIAL_IIR_MS 0x00
149
150 /*
151 * Emulation of the bit mask on the LINE STATUS REGISTER.
152 */
153 #define SERIAL_LSR_DR 0x0001
154 #define SERIAL_LSR_OE 0x0002
155 #define SERIAL_LSR_PE 0x0004
156 #define SERIAL_LSR_FE 0x0008
157 #define SERIAL_LSR_BI 0x0010
158
159 #define MOS_MSR_DELTA_CTS 0x10
160 #define MOS_MSR_DELTA_DSR 0x20
161 #define MOS_MSR_DELTA_RI 0x40
162 #define MOS_MSR_DELTA_CD 0x80
163
164 /* Serial Port register Address */
165 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
166 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
167 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
168 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
169 #define LINE_STATUS_REGISTER ((__u16)(0x05))
170 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
171 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
172 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
173 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
174
175 #define CLK_MULTI_REGISTER ((__u16)(0x02))
176 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
177 #define GPIO_REGISTER ((__u16)(0x07))
178
179 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
180
181 /*
182 * URB POOL related defines
183 */
184 #define NUM_URBS 16 /* URB Count */
185 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
186
187
188 static const struct usb_device_id moschip_port_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_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
206 {} /* terminating entry */
207 };
208
209 static const struct usb_device_id moschip_id_table_combined[] = {
210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
211 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
213 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
214 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
215 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
224 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
226 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
227 {} /* terminating entry */
228 };
229
230 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
231
232 /* This structure holds all of the local port information */
233
234 struct moschip_port {
235 int port_num; /*Actual port number in the device(1,2,etc) */
236 struct urb *write_urb; /* write URB for this port */
237 struct urb *read_urb; /* read URB for this port */
238 __u8 shadowLCR; /* last LCR value received */
239 __u8 shadowMCR; /* last MCR value received */
240 char open;
241 char open_ports;
242 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
243 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
244 int delta_msr_cond;
245 struct async_icount icount;
246 struct usb_serial_port *port; /* loop back to the owner of this object */
247
248 /* Offsets */
249 __u8 SpRegOffset;
250 __u8 ControlRegOffset;
251 __u8 DcrRegOffset;
252 /* for processing control URBS in interrupt context */
253 struct urb *control_urb;
254 struct usb_ctrlrequest *dr;
255 char *ctrl_buf;
256 int MsrLsr;
257
258 spinlock_t pool_lock;
259 struct urb *write_urb_pool[NUM_URBS];
260 char busy[NUM_URBS];
261 bool read_urb_busy;
262 };
263
264
265 static bool debug;
266
267 /*
268 * mos7840_set_reg_sync
269 * To set the Control register by calling usb_fill_control_urb function
270 * by passing usb_sndctrlpipe function as parameter.
271 */
272
273 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
274 __u16 val)
275 {
276 struct usb_device *dev = port->serial->dev;
277 val = val & 0x00ff;
278 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
279
280 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
281 MCS_WR_RTYPE, val, reg, NULL, 0,
282 MOS_WDR_TIMEOUT);
283 }
284
285 /*
286 * mos7840_get_reg_sync
287 * To set the Uart register by calling usb_fill_control_urb function by
288 * passing usb_rcvctrlpipe function as parameter.
289 */
290
291 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
292 __u16 *val)
293 {
294 struct usb_device *dev = port->serial->dev;
295 int ret = 0;
296 u8 *buf;
297
298 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
299 if (!buf)
300 return -ENOMEM;
301
302 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
303 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
304 MOS_WDR_TIMEOUT);
305 *val = buf[0];
306 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
307
308 kfree(buf);
309 return ret;
310 }
311
312 /*
313 * mos7840_set_uart_reg
314 * To set the Uart register by calling usb_fill_control_urb function by
315 * passing usb_sndctrlpipe function as parameter.
316 */
317
318 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
319 __u16 val)
320 {
321
322 struct usb_device *dev = port->serial->dev;
323 val = val & 0x00ff;
324 /* For the UART control registers, the application number need
325 to be Or'ed */
326 if (port->serial->num_ports == 4) {
327 val |= (((__u16) port->number -
328 (__u16) (port->serial->minor)) + 1) << 8;
329 dbg("mos7840_set_uart_reg application number is %x", val);
330 } else {
331 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
332 val |= (((__u16) port->number -
333 (__u16) (port->serial->minor)) + 1) << 8;
334 dbg("mos7840_set_uart_reg application number is %x",
335 val);
336 } else {
337 val |=
338 (((__u16) port->number -
339 (__u16) (port->serial->minor)) + 2) << 8;
340 dbg("mos7840_set_uart_reg application number is %x",
341 val);
342 }
343 }
344 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
345 MCS_WR_RTYPE, val, reg, NULL, 0,
346 MOS_WDR_TIMEOUT);
347
348 }
349
350 /*
351 * mos7840_get_uart_reg
352 * To set the Control register by calling usb_fill_control_urb function
353 * by passing usb_rcvctrlpipe function as parameter.
354 */
355 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
356 __u16 *val)
357 {
358 struct usb_device *dev = port->serial->dev;
359 int ret = 0;
360 __u16 Wval;
361 u8 *buf;
362
363 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
364 if (!buf)
365 return -ENOMEM;
366
367 /* dbg("application number is %4x",
368 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
369 /* Wval is same as application number */
370 if (port->serial->num_ports == 4) {
371 Wval =
372 (((__u16) port->number - (__u16) (port->serial->minor)) +
373 1) << 8;
374 dbg("mos7840_get_uart_reg application number is %x", Wval);
375 } else {
376 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
377 Wval = (((__u16) port->number -
378 (__u16) (port->serial->minor)) + 1) << 8;
379 dbg("mos7840_get_uart_reg application number is %x",
380 Wval);
381 } else {
382 Wval = (((__u16) port->number -
383 (__u16) (port->serial->minor)) + 2) << 8;
384 dbg("mos7840_get_uart_reg application number is %x",
385 Wval);
386 }
387 }
388 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
389 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
390 MOS_WDR_TIMEOUT);
391 *val = buf[0];
392
393 kfree(buf);
394 return ret;
395 }
396
397 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
398 {
399
400 dbg("***************************************");
401 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
402 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
403 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
404 dbg("***************************************");
405
406 }
407
408 /************************************************************************/
409 /************************************************************************/
410 /* I N T E R F A C E F U N C T I O N S */
411 /* I N T E R F A C E F U N C T I O N S */
412 /************************************************************************/
413 /************************************************************************/
414
415 static inline void mos7840_set_port_private(struct usb_serial_port *port,
416 struct moschip_port *data)
417 {
418 usb_set_serial_port_data(port, (void *)data);
419 }
420
421 static inline struct moschip_port *mos7840_get_port_private(struct
422 usb_serial_port
423 *port)
424 {
425 return (struct moschip_port *)usb_get_serial_port_data(port);
426 }
427
428 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
429 {
430 struct moschip_port *mos7840_port;
431 struct async_icount *icount;
432 mos7840_port = port;
433 icount = &mos7840_port->icount;
434 if (new_msr &
435 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
436 MOS_MSR_DELTA_CD)) {
437 icount = &mos7840_port->icount;
438
439 /* update input line counters */
440 if (new_msr & MOS_MSR_DELTA_CTS) {
441 icount->cts++;
442 smp_wmb();
443 }
444 if (new_msr & MOS_MSR_DELTA_DSR) {
445 icount->dsr++;
446 smp_wmb();
447 }
448 if (new_msr & MOS_MSR_DELTA_CD) {
449 icount->dcd++;
450 smp_wmb();
451 }
452 if (new_msr & MOS_MSR_DELTA_RI) {
453 icount->rng++;
454 smp_wmb();
455 }
456 }
457 }
458
459 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
460 {
461 struct async_icount *icount;
462
463 dbg("%s - %02x", __func__, new_lsr);
464
465 if (new_lsr & SERIAL_LSR_BI) {
466 /*
467 * Parity and Framing errors only count if they
468 * occur exclusive of a break being
469 * received.
470 */
471 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
472 }
473
474 /* update input line counters */
475 icount = &port->icount;
476 if (new_lsr & SERIAL_LSR_BI) {
477 icount->brk++;
478 smp_wmb();
479 }
480 if (new_lsr & SERIAL_LSR_OE) {
481 icount->overrun++;
482 smp_wmb();
483 }
484 if (new_lsr & SERIAL_LSR_PE) {
485 icount->parity++;
486 smp_wmb();
487 }
488 if (new_lsr & SERIAL_LSR_FE) {
489 icount->frame++;
490 smp_wmb();
491 }
492 }
493
494 /************************************************************************/
495 /************************************************************************/
496 /* U S B C A L L B A C K F U N C T I O N S */
497 /* U S B C A L L B A C K F U N C T I O N S */
498 /************************************************************************/
499 /************************************************************************/
500
501 static void mos7840_control_callback(struct urb *urb)
502 {
503 unsigned char *data;
504 struct moschip_port *mos7840_port;
505 __u8 regval = 0x0;
506 int status = urb->status;
507
508 mos7840_port = urb->context;
509
510 switch (status) {
511 case 0:
512 /* success */
513 break;
514 case -ECONNRESET:
515 case -ENOENT:
516 case -ESHUTDOWN:
517 /* this urb is terminated, clean up */
518 dbg("%s - urb shutting down with status: %d", __func__,
519 status);
520 return;
521 default:
522 dbg("%s - nonzero urb status received: %d", __func__,
523 status);
524 return;
525 }
526
527 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
528 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
529 mos7840_port->MsrLsr, mos7840_port->port_num);
530 data = urb->transfer_buffer;
531 regval = (__u8) data[0];
532 dbg("%s data is %x", __func__, regval);
533 if (mos7840_port->MsrLsr == 0)
534 mos7840_handle_new_msr(mos7840_port, regval);
535 else if (mos7840_port->MsrLsr == 1)
536 mos7840_handle_new_lsr(mos7840_port, regval);
537 }
538
539 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
540 __u16 *val)
541 {
542 struct usb_device *dev = mcs->port->serial->dev;
543 struct usb_ctrlrequest *dr = mcs->dr;
544 unsigned char *buffer = mcs->ctrl_buf;
545 int ret;
546
547 dr->bRequestType = MCS_RD_RTYPE;
548 dr->bRequest = MCS_RDREQ;
549 dr->wValue = cpu_to_le16(Wval); /* 0 */
550 dr->wIndex = cpu_to_le16(reg);
551 dr->wLength = cpu_to_le16(2);
552
553 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
554 (unsigned char *)dr, buffer, 2,
555 mos7840_control_callback, mcs);
556 mcs->control_urb->transfer_buffer_length = 2;
557 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
558 return ret;
559 }
560
561 /*****************************************************************************
562 * mos7840_interrupt_callback
563 * this is the callback function for when we have received data on the
564 * interrupt endpoint.
565 *****************************************************************************/
566
567 static void mos7840_interrupt_callback(struct urb *urb)
568 {
569 int result;
570 int length;
571 struct moschip_port *mos7840_port;
572 struct usb_serial *serial;
573 __u16 Data;
574 unsigned char *data;
575 __u8 sp[5], st;
576 int i, rv = 0;
577 __u16 wval, wreg = 0;
578 int status = urb->status;
579
580 dbg("%s", " : Entering");
581
582 switch (status) {
583 case 0:
584 /* success */
585 break;
586 case -ECONNRESET:
587 case -ENOENT:
588 case -ESHUTDOWN:
589 /* this urb is terminated, clean up */
590 dbg("%s - urb shutting down with status: %d", __func__,
591 status);
592 return;
593 default:
594 dbg("%s - nonzero urb status received: %d", __func__,
595 status);
596 goto exit;
597 }
598
599 length = urb->actual_length;
600 data = urb->transfer_buffer;
601
602 serial = urb->context;
603
604 /* Moschip get 5 bytes
605 * Byte 1 IIR Port 1 (port.number is 0)
606 * Byte 2 IIR Port 2 (port.number is 1)
607 * Byte 3 IIR Port 3 (port.number is 2)
608 * Byte 4 IIR Port 4 (port.number is 3)
609 * Byte 5 FIFO status for both */
610
611 if (length && length > 5) {
612 dbg("%s", "Wrong data !!!");
613 return;
614 }
615
616 sp[0] = (__u8) data[0];
617 sp[1] = (__u8) data[1];
618 sp[2] = (__u8) data[2];
619 sp[3] = (__u8) data[3];
620 st = (__u8) data[4];
621
622 for (i = 0; i < serial->num_ports; i++) {
623 mos7840_port = mos7840_get_port_private(serial->port[i]);
624 wval =
625 (((__u16) serial->port[i]->number -
626 (__u16) (serial->minor)) + 1) << 8;
627 if (mos7840_port->open) {
628 if (sp[i] & 0x01) {
629 dbg("SP%d No Interrupt !!!", i);
630 } else {
631 switch (sp[i] & 0x0f) {
632 case SERIAL_IIR_RLS:
633 dbg("Serial Port %d: Receiver status error or ", i);
634 dbg("address bit detected in 9-bit mode");
635 mos7840_port->MsrLsr = 1;
636 wreg = LINE_STATUS_REGISTER;
637 break;
638 case SERIAL_IIR_MS:
639 dbg("Serial Port %d: Modem status change", i);
640 mos7840_port->MsrLsr = 0;
641 wreg = MODEM_STATUS_REGISTER;
642 break;
643 }
644 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
645 }
646 }
647 }
648 if (!(rv < 0))
649 /* the completion handler for the control urb will resubmit */
650 return;
651 exit:
652 result = usb_submit_urb(urb, GFP_ATOMIC);
653 if (result) {
654 dev_err(&urb->dev->dev,
655 "%s - Error %d submitting interrupt urb\n",
656 __func__, result);
657 }
658 }
659
660 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
661 const char *function)
662 {
663 if (!port) {
664 dbg("%s - port == NULL", function);
665 return -1;
666 }
667 if (!port->serial) {
668 dbg("%s - port->serial == NULL", function);
669 return -1;
670 }
671
672 return 0;
673 }
674
675 /* Inline functions to check the sanity of a pointer that is passed to us */
676 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
677 const char *function)
678 {
679 if (!serial) {
680 dbg("%s - serial == NULL", function);
681 return -1;
682 }
683 if (!serial->type) {
684 dbg("%s - serial->type == NULL!", function);
685 return -1;
686 }
687
688 return 0;
689 }
690
691 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
692 const char *function)
693 {
694 /* if no port was specified, or it fails a paranoia check */
695 if (!port ||
696 mos7840_port_paranoia_check(port, function) ||
697 mos7840_serial_paranoia_check(port->serial, function)) {
698 /* then say that we don't have a valid usb_serial thing,
699 * which will end up genrating -ENODEV return values */
700 return NULL;
701 }
702
703 return port->serial;
704 }
705
706 /*****************************************************************************
707 * mos7840_bulk_in_callback
708 * this is the callback function for when we have received data on the
709 * bulk in endpoint.
710 *****************************************************************************/
711
712 static void mos7840_bulk_in_callback(struct urb *urb)
713 {
714 int retval;
715 unsigned char *data;
716 struct usb_serial *serial;
717 struct usb_serial_port *port;
718 struct moschip_port *mos7840_port;
719 struct tty_struct *tty;
720 int status = urb->status;
721
722 mos7840_port = urb->context;
723 if (!mos7840_port) {
724 dbg("%s", "NULL mos7840_port pointer");
725 return;
726 }
727
728 if (status) {
729 dbg("nonzero read bulk status received: %d", status);
730 mos7840_port->read_urb_busy = false;
731 return;
732 }
733
734 port = (struct usb_serial_port *)mos7840_port->port;
735 if (mos7840_port_paranoia_check(port, __func__)) {
736 dbg("%s", "Port Paranoia failed");
737 mos7840_port->read_urb_busy = false;
738 return;
739 }
740
741 serial = mos7840_get_usb_serial(port, __func__);
742 if (!serial) {
743 dbg("%s", "Bad serial pointer");
744 mos7840_port->read_urb_busy = false;
745 return;
746 }
747
748 dbg("%s", "Entering... ");
749
750 data = urb->transfer_buffer;
751
752 dbg("%s", "Entering ...........");
753
754 if (urb->actual_length) {
755 tty = tty_port_tty_get(&mos7840_port->port->port);
756 if (tty) {
757 tty_insert_flip_string(tty, data, urb->actual_length);
758 dbg(" %s ", data);
759 tty_flip_buffer_push(tty);
760 tty_kref_put(tty);
761 }
762 mos7840_port->icount.rx += urb->actual_length;
763 smp_wmb();
764 dbg("mos7840_port->icount.rx is %d:",
765 mos7840_port->icount.rx);
766 }
767
768 if (!mos7840_port->read_urb) {
769 dbg("%s", "URB KILLED !!!");
770 mos7840_port->read_urb_busy = false;
771 return;
772 }
773
774
775 mos7840_port->read_urb_busy = true;
776 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
777
778 if (retval) {
779 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
780 mos7840_port->read_urb_busy = false;
781 }
782 }
783
784 /*****************************************************************************
785 * mos7840_bulk_out_data_callback
786 * this is the callback function for when we have finished sending
787 * serial data on the bulk out endpoint.
788 *****************************************************************************/
789
790 static void mos7840_bulk_out_data_callback(struct urb *urb)
791 {
792 struct moschip_port *mos7840_port;
793 struct tty_struct *tty;
794 int status = urb->status;
795 int i;
796
797 mos7840_port = urb->context;
798 spin_lock(&mos7840_port->pool_lock);
799 for (i = 0; i < NUM_URBS; i++) {
800 if (urb == mos7840_port->write_urb_pool[i]) {
801 mos7840_port->busy[i] = 0;
802 break;
803 }
804 }
805 spin_unlock(&mos7840_port->pool_lock);
806
807 if (status) {
808 dbg("nonzero write bulk status received:%d", status);
809 return;
810 }
811
812 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
813 dbg("%s", "Port Paranoia failed");
814 return;
815 }
816
817 dbg("%s", "Entering .........");
818
819 tty = tty_port_tty_get(&mos7840_port->port->port);
820 if (tty && mos7840_port->open)
821 tty_wakeup(tty);
822 tty_kref_put(tty);
823
824 }
825
826 /************************************************************************/
827 /* 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 */
828 /************************************************************************/
829 #ifdef MCSSerialProbe
830 static int mos7840_serial_probe(struct usb_serial *serial,
831 const struct usb_device_id *id)
832 {
833
834 /*need to implement the mode_reg reading and updating\
835 structures usb_serial_ device_type\
836 (i.e num_ports, num_bulkin,bulkout etc) */
837 /* Also we can update the changes attach */
838 return 1;
839 }
840 #endif
841
842 /*****************************************************************************
843 * mos7840_open
844 * this function is called by the tty driver when a port is opened
845 * If successful, we return 0
846 * Otherwise we return a negative error number.
847 *****************************************************************************/
848
849 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
850 {
851 int response;
852 int j;
853 struct usb_serial *serial;
854 struct urb *urb;
855 __u16 Data;
856 int status;
857 struct moschip_port *mos7840_port;
858 struct moschip_port *port0;
859
860 dbg ("%s enter", __func__);
861
862 if (mos7840_port_paranoia_check(port, __func__)) {
863 dbg("%s", "Port Paranoia failed");
864 return -ENODEV;
865 }
866
867 serial = port->serial;
868
869 if (mos7840_serial_paranoia_check(serial, __func__)) {
870 dbg("%s", "Serial Paranoia failed");
871 return -ENODEV;
872 }
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 dbg("Reading Spreg failed");
924 return -1;
925 }
926 Data |= 0x80;
927 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
928 if (status < 0) {
929 dbg("writing Spreg failed");
930 return -1;
931 }
932
933 Data &= ~0x80;
934 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
935 if (status < 0) {
936 dbg("writing Spreg failed");
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 dbg("Reading Controlreg failed");
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 dbg("writing Controlreg failed");
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 dbg("disabling interrupts failed");
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 dbg("Writing FIFO_CONTROL_REGISTER failed");
972 return -1;
973 }
974
975 Data = 0xcf;
976 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
977 if (status < 0) {
978 dbg("Writing FIFO_CONTROL_REGISTER failed");
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 dbg("port number is %d", port->number);
1076 dbg("serial number is %d", port->serial->minor);
1077 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1078 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1079 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1080 dbg("port's number in the device is %d", 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 dbg("mos7840_open: bulkin endpoint is %d",
1105 port->bulk_in_endpointAddress);
1106 mos7840_port->read_urb_busy = true;
1107 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1108 if (response) {
1109 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1110 __func__, response);
1111 mos7840_port->read_urb_busy = false;
1112 }
1113
1114 /* initialize our wait queues */
1115 init_waitqueue_head(&mos7840_port->wait_chase);
1116 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1117
1118 /* initialize our icount structure */
1119 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1120
1121 /* initialize our port settings */
1122 /* Must set to enable ints! */
1123 mos7840_port->shadowMCR = MCR_MASTER_IE;
1124 /* send a open port command */
1125 mos7840_port->open = 1;
1126 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1127 mos7840_port->icount.tx = 0;
1128 mos7840_port->icount.rx = 0;
1129
1130 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1131 serial, mos7840_port, port);
1132
1133 dbg ("%s leave", __func__);
1134
1135 return 0;
1136
1137 }
1138
1139 /*****************************************************************************
1140 * mos7840_chars_in_buffer
1141 * this function is called by the tty driver when it wants to know how many
1142 * bytes of data we currently have outstanding in the port (data that has
1143 * been written, but hasn't made it out the port yet)
1144 * If successful, we return the number of bytes left to be written in the
1145 * system,
1146 * Otherwise we return zero.
1147 *****************************************************************************/
1148
1149 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1150 {
1151 struct usb_serial_port *port = tty->driver_data;
1152 int i;
1153 int chars = 0;
1154 unsigned long flags;
1155 struct moschip_port *mos7840_port;
1156
1157 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1158
1159 if (mos7840_port_paranoia_check(port, __func__)) {
1160 dbg("%s", "Invalid port");
1161 return 0;
1162 }
1163
1164 mos7840_port = mos7840_get_port_private(port);
1165 if (mos7840_port == NULL) {
1166 dbg("%s", "mos7840_break:leaving ...........");
1167 return 0;
1168 }
1169
1170 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1171 for (i = 0; i < NUM_URBS; ++i) {
1172 if (mos7840_port->busy[i]) {
1173 struct urb *urb = mos7840_port->write_urb_pool[i];
1174 chars += urb->transfer_buffer_length;
1175 }
1176 }
1177 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1178 dbg("%s - returns %d", __func__, chars);
1179 return chars;
1180
1181 }
1182
1183 /*****************************************************************************
1184 * mos7840_close
1185 * this function is called by the tty driver when a port is closed
1186 *****************************************************************************/
1187
1188 static void mos7840_close(struct usb_serial_port *port)
1189 {
1190 struct usb_serial *serial;
1191 struct moschip_port *mos7840_port;
1192 struct moschip_port *port0;
1193 int j;
1194 __u16 Data;
1195
1196 dbg("%s", "mos7840_close:entering...");
1197
1198 if (mos7840_port_paranoia_check(port, __func__)) {
1199 dbg("%s", "Port Paranoia failed");
1200 return;
1201 }
1202
1203 serial = mos7840_get_usb_serial(port, __func__);
1204 if (!serial) {
1205 dbg("%s", "Serial Paranoia failed");
1206 return;
1207 }
1208
1209 mos7840_port = mos7840_get_port_private(port);
1210 port0 = mos7840_get_port_private(serial->port[0]);
1211
1212 if (mos7840_port == NULL || port0 == NULL)
1213 return;
1214
1215 for (j = 0; j < NUM_URBS; ++j)
1216 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1217
1218 /* Freeing Write URBs */
1219 for (j = 0; j < NUM_URBS; ++j) {
1220 if (mos7840_port->write_urb_pool[j]) {
1221 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1222 kfree(mos7840_port->write_urb_pool[j]->
1223 transfer_buffer);
1224
1225 usb_free_urb(mos7840_port->write_urb_pool[j]);
1226 }
1227 }
1228
1229 /* While closing port, shutdown all bulk read, write *
1230 * and interrupt read if they exists */
1231 if (serial->dev) {
1232 if (mos7840_port->write_urb) {
1233 dbg("%s", "Shutdown bulk write");
1234 usb_kill_urb(mos7840_port->write_urb);
1235 }
1236 if (mos7840_port->read_urb) {
1237 dbg("%s", "Shutdown bulk read");
1238 usb_kill_urb(mos7840_port->read_urb);
1239 mos7840_port->read_urb_busy = false;
1240 }
1241 if ((&mos7840_port->control_urb)) {
1242 dbg("%s", "Shutdown control read");
1243 /*/ usb_kill_urb (mos7840_port->control_urb); */
1244 }
1245 }
1246 /* if(mos7840_port->ctrl_buf != NULL) */
1247 /* kfree(mos7840_port->ctrl_buf); */
1248 port0->open_ports--;
1249 dbg("mos7840_num_open_ports in close%d:in port%d",
1250 port0->open_ports, port->number);
1251 if (port0->open_ports == 0) {
1252 if (serial->port[0]->interrupt_in_urb) {
1253 dbg("%s", "Shutdown interrupt_in_urb");
1254 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1255 }
1256 }
1257
1258 if (mos7840_port->write_urb) {
1259 /* if this urb had a transfer buffer already (old tx) free it */
1260 if (mos7840_port->write_urb->transfer_buffer != NULL)
1261 kfree(mos7840_port->write_urb->transfer_buffer);
1262 usb_free_urb(mos7840_port->write_urb);
1263 }
1264
1265 Data = 0x0;
1266 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1267
1268 Data = 0x00;
1269 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1270
1271 mos7840_port->open = 0;
1272
1273 dbg("%s", "Leaving ............");
1274 }
1275
1276 /************************************************************************
1277 *
1278 * mos7840_block_until_chase_response
1279 *
1280 * This function will block the close until one of the following:
1281 * 1. Response to our Chase comes from mos7840
1282 * 2. A timeout of 10 seconds without activity has expired
1283 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1284 *
1285 ************************************************************************/
1286
1287 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1288 struct moschip_port *mos7840_port)
1289 {
1290 int timeout = 1 * HZ;
1291 int wait = 10;
1292 int count;
1293
1294 while (1) {
1295 count = mos7840_chars_in_buffer(tty);
1296
1297 /* Check for Buffer status */
1298 if (count <= 0)
1299 return;
1300
1301 /* Block the thread for a while */
1302 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1303 timeout);
1304 /* No activity.. count down section */
1305 wait--;
1306 if (wait == 0) {
1307 dbg("%s - TIMEOUT", __func__);
1308 return;
1309 } else {
1310 /* Reset timeout value back to seconds */
1311 wait = 10;
1312 }
1313 }
1314
1315 }
1316
1317 /*****************************************************************************
1318 * mos7840_break
1319 * this function sends a break to the port
1320 *****************************************************************************/
1321 static void mos7840_break(struct tty_struct *tty, int break_state)
1322 {
1323 struct usb_serial_port *port = tty->driver_data;
1324 unsigned char data;
1325 struct usb_serial *serial;
1326 struct moschip_port *mos7840_port;
1327
1328 dbg("%s", "Entering ...........");
1329 dbg("mos7840_break: Start");
1330
1331 if (mos7840_port_paranoia_check(port, __func__)) {
1332 dbg("%s", "Port Paranoia failed");
1333 return;
1334 }
1335
1336 serial = mos7840_get_usb_serial(port, __func__);
1337 if (!serial) {
1338 dbg("%s", "Serial Paranoia failed");
1339 return;
1340 }
1341
1342 mos7840_port = mos7840_get_port_private(port);
1343
1344 if (mos7840_port == NULL)
1345 return;
1346
1347 if (serial->dev)
1348 /* flush and block until tx is empty */
1349 mos7840_block_until_chase_response(tty, mos7840_port);
1350
1351 if (break_state == -1)
1352 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1353 else
1354 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1355
1356 /* FIXME: no locking on shadowLCR anywhere in driver */
1357 mos7840_port->shadowLCR = data;
1358 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1359 mos7840_port->shadowLCR);
1360 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1361 mos7840_port->shadowLCR);
1362 }
1363
1364 /*****************************************************************************
1365 * mos7840_write_room
1366 * this function is called by the tty driver when it wants to know how many
1367 * bytes of data we can accept for a specific port.
1368 * If successful, we return the amount of room that we have for this port
1369 * Otherwise we return a negative error number.
1370 *****************************************************************************/
1371
1372 static int mos7840_write_room(struct tty_struct *tty)
1373 {
1374 struct usb_serial_port *port = tty->driver_data;
1375 int i;
1376 int room = 0;
1377 unsigned long flags;
1378 struct moschip_port *mos7840_port;
1379
1380 dbg("%s", " mos7840_write_room:entering ...........");
1381
1382 if (mos7840_port_paranoia_check(port, __func__)) {
1383 dbg("%s", "Invalid port");
1384 dbg("%s", " mos7840_write_room:leaving ...........");
1385 return -1;
1386 }
1387
1388 mos7840_port = mos7840_get_port_private(port);
1389 if (mos7840_port == NULL) {
1390 dbg("%s", "mos7840_break:leaving ...........");
1391 return -1;
1392 }
1393
1394 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1395 for (i = 0; i < NUM_URBS; ++i) {
1396 if (!mos7840_port->busy[i])
1397 room += URB_TRANSFER_BUFFER_SIZE;
1398 }
1399 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1400
1401 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1402 dbg("%s - returns %d", __func__, room);
1403 return room;
1404
1405 }
1406
1407 /*****************************************************************************
1408 * mos7840_write
1409 * this function is called by the tty driver when data should be written to
1410 * the port.
1411 * If successful, we return the number of bytes written, otherwise we
1412 * return a negative error number.
1413 *****************************************************************************/
1414
1415 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1416 const unsigned char *data, int count)
1417 {
1418 int status;
1419 int i;
1420 int bytes_sent = 0;
1421 int transfer_size;
1422 unsigned long flags;
1423
1424 struct moschip_port *mos7840_port;
1425 struct usb_serial *serial;
1426 struct urb *urb;
1427 /* __u16 Data; */
1428 const unsigned char *current_position = data;
1429 unsigned char *data1;
1430 dbg("%s", "entering ...........");
1431 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1432 mos7840_port->shadowLCR); */
1433
1434 #ifdef NOTMOS7840
1435 Data = 0x00;
1436 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1437 mos7840_port->shadowLCR = Data;
1438 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1439 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1440 mos7840_port->shadowLCR);
1441
1442 /* Data = 0x03; */
1443 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1444 /* mos7840_port->shadowLCR=Data;//Need to add later */
1445
1446 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1447 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1448
1449 /* Data = 0x0c; */
1450 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1451 Data = 0x00;
1452 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1453 dbg("mos7840_write:DLL value is %x", Data);
1454
1455 Data = 0x0;
1456 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1457 dbg("mos7840_write:DLM value is %x", Data);
1458
1459 Data = Data & ~SERIAL_LCR_DLAB;
1460 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1461 mos7840_port->shadowLCR);
1462 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1463 #endif
1464
1465 if (mos7840_port_paranoia_check(port, __func__)) {
1466 dbg("%s", "Port Paranoia failed");
1467 return -1;
1468 }
1469
1470 serial = port->serial;
1471 if (mos7840_serial_paranoia_check(serial, __func__)) {
1472 dbg("%s", "Serial Paranoia failed");
1473 return -1;
1474 }
1475
1476 mos7840_port = mos7840_get_port_private(port);
1477 if (mos7840_port == NULL) {
1478 dbg("%s", "mos7840_port is NULL");
1479 return -1;
1480 }
1481
1482 /* try to find a free urb in the list */
1483 urb = NULL;
1484
1485 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1486 for (i = 0; i < NUM_URBS; ++i) {
1487 if (!mos7840_port->busy[i]) {
1488 mos7840_port->busy[i] = 1;
1489 urb = mos7840_port->write_urb_pool[i];
1490 dbg("URB:%d", i);
1491 break;
1492 }
1493 }
1494 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1495
1496 if (urb == NULL) {
1497 dbg("%s - no more free urbs", __func__);
1498 goto exit;
1499 }
1500
1501 if (urb->transfer_buffer == NULL) {
1502 urb->transfer_buffer =
1503 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1504
1505 if (urb->transfer_buffer == NULL) {
1506 dev_err_console(port, "%s no more kernel memory...\n",
1507 __func__);
1508 goto exit;
1509 }
1510 }
1511 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1512
1513 memcpy(urb->transfer_buffer, current_position, transfer_size);
1514
1515 /* fill urb with data and submit */
1516 if ((serial->num_ports == 2)
1517 && ((((__u16)port->number -
1518 (__u16)(port->serial->minor)) % 2) != 0)) {
1519 usb_fill_bulk_urb(urb,
1520 serial->dev,
1521 usb_sndbulkpipe(serial->dev,
1522 (port->bulk_out_endpointAddress) + 2),
1523 urb->transfer_buffer,
1524 transfer_size,
1525 mos7840_bulk_out_data_callback, mos7840_port);
1526 } else {
1527 usb_fill_bulk_urb(urb,
1528 serial->dev,
1529 usb_sndbulkpipe(serial->dev,
1530 port->bulk_out_endpointAddress),
1531 urb->transfer_buffer,
1532 transfer_size,
1533 mos7840_bulk_out_data_callback, mos7840_port);
1534 }
1535
1536 data1 = urb->transfer_buffer;
1537 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1538
1539 /* send it down the pipe */
1540 status = usb_submit_urb(urb, GFP_ATOMIC);
1541
1542 if (status) {
1543 mos7840_port->busy[i] = 0;
1544 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1545 "with status = %d\n", __func__, status);
1546 bytes_sent = status;
1547 goto exit;
1548 }
1549 bytes_sent = transfer_size;
1550 mos7840_port->icount.tx += transfer_size;
1551 smp_wmb();
1552 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1553 exit:
1554 return bytes_sent;
1555
1556 }
1557
1558 /*****************************************************************************
1559 * mos7840_throttle
1560 * this function is called by the tty driver when it wants to stop the data
1561 * being read from the port.
1562 *****************************************************************************/
1563
1564 static void mos7840_throttle(struct tty_struct *tty)
1565 {
1566 struct usb_serial_port *port = tty->driver_data;
1567 struct moschip_port *mos7840_port;
1568 int status;
1569
1570 if (mos7840_port_paranoia_check(port, __func__)) {
1571 dbg("%s", "Invalid port");
1572 return;
1573 }
1574
1575 dbg("- port %d", port->number);
1576
1577 mos7840_port = mos7840_get_port_private(port);
1578
1579 if (mos7840_port == NULL)
1580 return;
1581
1582 if (!mos7840_port->open) {
1583 dbg("%s", "port not opened");
1584 return;
1585 }
1586
1587 dbg("%s", "Entering ..........");
1588
1589 /* if we are implementing XON/XOFF, send the stop character */
1590 if (I_IXOFF(tty)) {
1591 unsigned char stop_char = STOP_CHAR(tty);
1592 status = mos7840_write(tty, port, &stop_char, 1);
1593 if (status <= 0)
1594 return;
1595 }
1596 /* if we are implementing RTS/CTS, toggle that line */
1597 if (tty->termios->c_cflag & CRTSCTS) {
1598 mos7840_port->shadowMCR &= ~MCR_RTS;
1599 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1600 mos7840_port->shadowMCR);
1601 if (status < 0)
1602 return;
1603 }
1604 }
1605
1606 /*****************************************************************************
1607 * mos7840_unthrottle
1608 * this function is called by the tty driver when it wants to resume
1609 * the data being read from the port (called after mos7840_throttle is
1610 * called)
1611 *****************************************************************************/
1612 static void mos7840_unthrottle(struct tty_struct *tty)
1613 {
1614 struct usb_serial_port *port = tty->driver_data;
1615 int status;
1616 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1617
1618 if (mos7840_port_paranoia_check(port, __func__)) {
1619 dbg("%s", "Invalid port");
1620 return;
1621 }
1622
1623 if (mos7840_port == NULL)
1624 return;
1625
1626 if (!mos7840_port->open) {
1627 dbg("%s - port not opened", __func__);
1628 return;
1629 }
1630
1631 dbg("%s", "Entering ..........");
1632
1633 /* if we are implementing XON/XOFF, send the start character */
1634 if (I_IXOFF(tty)) {
1635 unsigned char start_char = START_CHAR(tty);
1636 status = mos7840_write(tty, port, &start_char, 1);
1637 if (status <= 0)
1638 return;
1639 }
1640
1641 /* if we are implementing RTS/CTS, toggle that line */
1642 if (tty->termios->c_cflag & CRTSCTS) {
1643 mos7840_port->shadowMCR |= MCR_RTS;
1644 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1645 mos7840_port->shadowMCR);
1646 if (status < 0)
1647 return;
1648 }
1649 }
1650
1651 static int mos7840_tiocmget(struct tty_struct *tty)
1652 {
1653 struct usb_serial_port *port = tty->driver_data;
1654 struct moschip_port *mos7840_port;
1655 unsigned int result;
1656 __u16 msr;
1657 __u16 mcr;
1658 int status;
1659 mos7840_port = mos7840_get_port_private(port);
1660
1661 dbg("%s - port %d", __func__, port->number);
1662
1663 if (mos7840_port == NULL)
1664 return -ENODEV;
1665
1666 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1667 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1668 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1669 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1670 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1671 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1672 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1673 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1674 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1675
1676 dbg("%s - 0x%04X", __func__, result);
1677
1678 return result;
1679 }
1680
1681 static int mos7840_tiocmset(struct tty_struct *tty,
1682 unsigned int set, unsigned int clear)
1683 {
1684 struct usb_serial_port *port = tty->driver_data;
1685 struct moschip_port *mos7840_port;
1686 unsigned int mcr;
1687 int status;
1688
1689 dbg("%s - port %d", __func__, port->number);
1690
1691 mos7840_port = mos7840_get_port_private(port);
1692
1693 if (mos7840_port == NULL)
1694 return -ENODEV;
1695
1696 /* FIXME: What locks the port registers ? */
1697 mcr = mos7840_port->shadowMCR;
1698 if (clear & TIOCM_RTS)
1699 mcr &= ~MCR_RTS;
1700 if (clear & TIOCM_DTR)
1701 mcr &= ~MCR_DTR;
1702 if (clear & TIOCM_LOOP)
1703 mcr &= ~MCR_LOOPBACK;
1704
1705 if (set & TIOCM_RTS)
1706 mcr |= MCR_RTS;
1707 if (set & TIOCM_DTR)
1708 mcr |= MCR_DTR;
1709 if (set & TIOCM_LOOP)
1710 mcr |= MCR_LOOPBACK;
1711
1712 mos7840_port->shadowMCR = mcr;
1713
1714 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1715 if (status < 0) {
1716 dbg("setting MODEM_CONTROL_REGISTER Failed");
1717 return status;
1718 }
1719
1720 return 0;
1721 }
1722
1723 /*****************************************************************************
1724 * mos7840_calc_baud_rate_divisor
1725 * this function calculates the proper baud rate divisor for the specified
1726 * baud rate.
1727 *****************************************************************************/
1728 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1729 __u16 *clk_sel_val)
1730 {
1731
1732 dbg("%s - %d", __func__, baudRate);
1733
1734 if (baudRate <= 115200) {
1735 *divisor = 115200 / baudRate;
1736 *clk_sel_val = 0x0;
1737 }
1738 if ((baudRate > 115200) && (baudRate <= 230400)) {
1739 *divisor = 230400 / baudRate;
1740 *clk_sel_val = 0x10;
1741 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1742 *divisor = 403200 / baudRate;
1743 *clk_sel_val = 0x20;
1744 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1745 *divisor = 460800 / baudRate;
1746 *clk_sel_val = 0x30;
1747 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1748 *divisor = 806400 / baudRate;
1749 *clk_sel_val = 0x40;
1750 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1751 *divisor = 921600 / baudRate;
1752 *clk_sel_val = 0x50;
1753 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1754 *divisor = 1572864 / baudRate;
1755 *clk_sel_val = 0x60;
1756 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1757 *divisor = 3145728 / baudRate;
1758 *clk_sel_val = 0x70;
1759 }
1760 return 0;
1761
1762 #ifdef NOTMCS7840
1763
1764 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1765 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1766 *divisor = mos7840_divisor_table[i].Divisor;
1767 return 0;
1768 }
1769 }
1770
1771 /* After trying for all the standard baud rates *
1772 * Try calculating the divisor for this baud rate */
1773
1774 if (baudrate > 75 && baudrate < 230400) {
1775 /* get the divisor */
1776 custom = (__u16) (230400L / baudrate);
1777
1778 /* Check for round off */
1779 round1 = (__u16) (2304000L / baudrate);
1780 round = (__u16) (round1 - (custom * 10));
1781 if (round > 4)
1782 custom++;
1783 *divisor = custom;
1784
1785 dbg(" Baud %d = %d", baudrate, custom);
1786 return 0;
1787 }
1788
1789 dbg("%s", " Baud calculation Failed...");
1790 return -1;
1791 #endif
1792 }
1793
1794 /*****************************************************************************
1795 * mos7840_send_cmd_write_baud_rate
1796 * this function sends the proper command to change the baud rate of the
1797 * specified port.
1798 *****************************************************************************/
1799
1800 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1801 int baudRate)
1802 {
1803 int divisor = 0;
1804 int status;
1805 __u16 Data;
1806 unsigned char number;
1807 __u16 clk_sel_val;
1808 struct usb_serial_port *port;
1809
1810 if (mos7840_port == NULL)
1811 return -1;
1812
1813 port = (struct usb_serial_port *)mos7840_port->port;
1814 if (mos7840_port_paranoia_check(port, __func__)) {
1815 dbg("%s", "Invalid port");
1816 return -1;
1817 }
1818
1819 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1820 dbg("%s", "Invalid Serial");
1821 return -1;
1822 }
1823
1824 dbg("%s", "Entering ..........");
1825
1826 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1827
1828 dbg("%s - port = %d, baud = %d", __func__,
1829 mos7840_port->port->number, baudRate);
1830 /* reset clk_uart_sel in spregOffset */
1831 if (baudRate > 115200) {
1832 #ifdef HW_flow_control
1833 /* NOTE: need to see the pther register to modify */
1834 /* setting h/w flow control bit to 1 */
1835 Data = 0x2b;
1836 mos7840_port->shadowMCR = Data;
1837 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1838 Data);
1839 if (status < 0) {
1840 dbg("Writing spreg failed in set_serial_baud");
1841 return -1;
1842 }
1843 #endif
1844
1845 } else {
1846 #ifdef HW_flow_control
1847 /* setting h/w flow control bit to 0 */
1848 Data = 0xb;
1849 mos7840_port->shadowMCR = Data;
1850 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1851 Data);
1852 if (status < 0) {
1853 dbg("Writing spreg failed in set_serial_baud");
1854 return -1;
1855 }
1856 #endif
1857
1858 }
1859
1860 if (1) { /* baudRate <= 115200) */
1861 clk_sel_val = 0x0;
1862 Data = 0x0;
1863 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1864 &clk_sel_val);
1865 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1866 &Data);
1867 if (status < 0) {
1868 dbg("reading spreg failed in set_serial_baud");
1869 return -1;
1870 }
1871 Data = (Data & 0x8f) | clk_sel_val;
1872 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1873 Data);
1874 if (status < 0) {
1875 dbg("Writing spreg failed in set_serial_baud");
1876 return -1;
1877 }
1878 /* Calculate the Divisor */
1879
1880 if (status) {
1881 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1882 return status;
1883 }
1884 /* Enable access to divisor latch */
1885 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1886 mos7840_port->shadowLCR = Data;
1887 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1888
1889 /* Write the divisor */
1890 Data = (unsigned char)(divisor & 0xff);
1891 dbg("set_serial_baud Value to write DLL is %x", Data);
1892 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1893
1894 Data = (unsigned char)((divisor & 0xff00) >> 8);
1895 dbg("set_serial_baud Value to write DLM is %x", Data);
1896 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1897
1898 /* Disable access to divisor latch */
1899 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1900 mos7840_port->shadowLCR = Data;
1901 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1902
1903 }
1904 return status;
1905 }
1906
1907 /*****************************************************************************
1908 * mos7840_change_port_settings
1909 * This routine is called to set the UART on the device to match
1910 * the specified new settings.
1911 *****************************************************************************/
1912
1913 static void mos7840_change_port_settings(struct tty_struct *tty,
1914 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1915 {
1916 int baud;
1917 unsigned cflag;
1918 unsigned iflag;
1919 __u8 lData;
1920 __u8 lParity;
1921 __u8 lStop;
1922 int status;
1923 __u16 Data;
1924 struct usb_serial_port *port;
1925 struct usb_serial *serial;
1926
1927 if (mos7840_port == NULL)
1928 return;
1929
1930 port = (struct usb_serial_port *)mos7840_port->port;
1931
1932 if (mos7840_port_paranoia_check(port, __func__)) {
1933 dbg("%s", "Invalid port");
1934 return;
1935 }
1936
1937 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1938 dbg("%s", "Invalid Serial");
1939 return;
1940 }
1941
1942 serial = port->serial;
1943
1944 dbg("%s - port %d", __func__, mos7840_port->port->number);
1945
1946 if (!mos7840_port->open) {
1947 dbg("%s - port not opened", __func__);
1948 return;
1949 }
1950
1951 dbg("%s", "Entering ..........");
1952
1953 lData = LCR_BITS_8;
1954 lStop = LCR_STOP_1;
1955 lParity = LCR_PAR_NONE;
1956
1957 cflag = tty->termios->c_cflag;
1958 iflag = tty->termios->c_iflag;
1959
1960 /* Change the number of bits */
1961 if (cflag & CSIZE) {
1962 switch (cflag & CSIZE) {
1963 case CS5:
1964 lData = LCR_BITS_5;
1965 break;
1966
1967 case CS6:
1968 lData = LCR_BITS_6;
1969 break;
1970
1971 case CS7:
1972 lData = LCR_BITS_7;
1973 break;
1974 default:
1975 case CS8:
1976 lData = LCR_BITS_8;
1977 break;
1978 }
1979 }
1980 /* Change the Parity bit */
1981 if (cflag & PARENB) {
1982 if (cflag & PARODD) {
1983 lParity = LCR_PAR_ODD;
1984 dbg("%s - parity = odd", __func__);
1985 } else {
1986 lParity = LCR_PAR_EVEN;
1987 dbg("%s - parity = even", __func__);
1988 }
1989
1990 } else {
1991 dbg("%s - parity = none", __func__);
1992 }
1993
1994 if (cflag & CMSPAR)
1995 lParity = lParity | 0x20;
1996
1997 /* Change the Stop bit */
1998 if (cflag & CSTOPB) {
1999 lStop = LCR_STOP_2;
2000 dbg("%s - stop bits = 2", __func__);
2001 } else {
2002 lStop = LCR_STOP_1;
2003 dbg("%s - stop bits = 1", __func__);
2004 }
2005
2006 /* Update the LCR with the correct value */
2007 mos7840_port->shadowLCR &=
2008 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2009 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2010
2011 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2012 mos7840_port->shadowLCR);
2013 /* Disable Interrupts */
2014 Data = 0x00;
2015 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2016
2017 Data = 0x00;
2018 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2019
2020 Data = 0xcf;
2021 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2022
2023 /* Send the updated LCR value to the mos7840 */
2024 Data = mos7840_port->shadowLCR;
2025
2026 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2027
2028 Data = 0x00b;
2029 mos7840_port->shadowMCR = Data;
2030 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2031 Data = 0x00b;
2032 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2033
2034 /* set up the MCR register and send it to the mos7840 */
2035
2036 mos7840_port->shadowMCR = MCR_MASTER_IE;
2037 if (cflag & CBAUD)
2038 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2039
2040 if (cflag & CRTSCTS)
2041 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2042 else
2043 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2044
2045 Data = mos7840_port->shadowMCR;
2046 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2047
2048 /* Determine divisor based on baud rate */
2049 baud = tty_get_baud_rate(tty);
2050
2051 if (!baud) {
2052 /* pick a default, any default... */
2053 dbg("%s", "Picked default baud...");
2054 baud = 9600;
2055 }
2056
2057 dbg("%s - baud rate = %d", __func__, baud);
2058 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2059
2060 /* Enable Interrupts */
2061 Data = 0x0c;
2062 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2063
2064 if (mos7840_port->read_urb_busy == false) {
2065 mos7840_port->read_urb_busy = true;
2066 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2067 if (status) {
2068 dbg("usb_submit_urb(read bulk) failed, status = %d",
2069 status);
2070 mos7840_port->read_urb_busy = false;
2071 }
2072 }
2073 wake_up(&mos7840_port->delta_msr_wait);
2074 mos7840_port->delta_msr_cond = 1;
2075 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2076 mos7840_port->shadowLCR);
2077 }
2078
2079 /*****************************************************************************
2080 * mos7840_set_termios
2081 * this function is called by the tty driver when it wants to change
2082 * the termios structure
2083 *****************************************************************************/
2084
2085 static void mos7840_set_termios(struct tty_struct *tty,
2086 struct usb_serial_port *port,
2087 struct ktermios *old_termios)
2088 {
2089 int status;
2090 unsigned int cflag;
2091 struct usb_serial *serial;
2092 struct moschip_port *mos7840_port;
2093 dbg("mos7840_set_termios: START");
2094 if (mos7840_port_paranoia_check(port, __func__)) {
2095 dbg("%s", "Invalid port");
2096 return;
2097 }
2098
2099 serial = port->serial;
2100
2101 if (mos7840_serial_paranoia_check(serial, __func__)) {
2102 dbg("%s", "Invalid Serial");
2103 return;
2104 }
2105
2106 mos7840_port = mos7840_get_port_private(port);
2107
2108 if (mos7840_port == NULL)
2109 return;
2110
2111 if (!mos7840_port->open) {
2112 dbg("%s - port not opened", __func__);
2113 return;
2114 }
2115
2116 dbg("%s", "setting termios - ");
2117
2118 cflag = tty->termios->c_cflag;
2119
2120 dbg("%s - clfag %08x iflag %08x", __func__,
2121 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2122 dbg("%s - old clfag %08x old iflag %08x", __func__,
2123 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2124 dbg("%s - port %d", __func__, port->number);
2125
2126 /* change the port settings to the new ones specified */
2127
2128 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2129
2130 if (!mos7840_port->read_urb) {
2131 dbg("%s", "URB KILLED !!!!!");
2132 return;
2133 }
2134
2135 if (mos7840_port->read_urb_busy == false) {
2136 mos7840_port->read_urb_busy = true;
2137 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2138 if (status) {
2139 dbg("usb_submit_urb(read bulk) failed, status = %d",
2140 status);
2141 mos7840_port->read_urb_busy = false;
2142 }
2143 }
2144 }
2145
2146 /*****************************************************************************
2147 * mos7840_get_lsr_info - get line status register info
2148 *
2149 * Purpose: Let user call ioctl() to get info when the UART physically
2150 * is emptied. On bus types like RS485, the transmitter must
2151 * release the bus after transmitting. This must be done when
2152 * the transmit shift register is empty, not be done when the
2153 * transmit holding register is empty. This functionality
2154 * allows an RS485 driver to be written in user space.
2155 *****************************************************************************/
2156
2157 static int mos7840_get_lsr_info(struct tty_struct *tty,
2158 unsigned int __user *value)
2159 {
2160 int count;
2161 unsigned int result = 0;
2162
2163 count = mos7840_chars_in_buffer(tty);
2164 if (count == 0) {
2165 dbg("%s -- Empty", __func__);
2166 result = TIOCSER_TEMT;
2167 }
2168
2169 if (copy_to_user(value, &result, sizeof(int)))
2170 return -EFAULT;
2171 return 0;
2172 }
2173
2174 /*****************************************************************************
2175 * mos7840_get_serial_info
2176 * function to get information about serial port
2177 *****************************************************************************/
2178
2179 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2180 struct serial_struct __user *retinfo)
2181 {
2182 struct serial_struct tmp;
2183
2184 if (mos7840_port == NULL)
2185 return -1;
2186
2187 if (!retinfo)
2188 return -EFAULT;
2189
2190 memset(&tmp, 0, sizeof(tmp));
2191
2192 tmp.type = PORT_16550A;
2193 tmp.line = mos7840_port->port->serial->minor;
2194 tmp.port = mos7840_port->port->number;
2195 tmp.irq = 0;
2196 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2197 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2198 tmp.baud_base = 9600;
2199 tmp.close_delay = 5 * HZ;
2200 tmp.closing_wait = 30 * HZ;
2201
2202 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2203 return -EFAULT;
2204 return 0;
2205 }
2206
2207 static int mos7840_get_icount(struct tty_struct *tty,
2208 struct serial_icounter_struct *icount)
2209 {
2210 struct usb_serial_port *port = tty->driver_data;
2211 struct moschip_port *mos7840_port;
2212 struct async_icount cnow;
2213
2214 mos7840_port = mos7840_get_port_private(port);
2215 cnow = mos7840_port->icount;
2216
2217 smp_rmb();
2218 icount->cts = cnow.cts;
2219 icount->dsr = cnow.dsr;
2220 icount->rng = cnow.rng;
2221 icount->dcd = cnow.dcd;
2222 icount->rx = cnow.rx;
2223 icount->tx = cnow.tx;
2224 icount->frame = cnow.frame;
2225 icount->overrun = cnow.overrun;
2226 icount->parity = cnow.parity;
2227 icount->brk = cnow.brk;
2228 icount->buf_overrun = cnow.buf_overrun;
2229
2230 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2231 port->number, icount->rx, icount->tx);
2232 return 0;
2233 }
2234
2235 /*****************************************************************************
2236 * SerialIoctl
2237 * this function handles any ioctl calls to the driver
2238 *****************************************************************************/
2239
2240 static int mos7840_ioctl(struct tty_struct *tty,
2241 unsigned int cmd, unsigned long arg)
2242 {
2243 struct usb_serial_port *port = tty->driver_data;
2244 void __user *argp = (void __user *)arg;
2245 struct moschip_port *mos7840_port;
2246
2247 struct async_icount cnow;
2248 struct async_icount cprev;
2249
2250 if (mos7840_port_paranoia_check(port, __func__)) {
2251 dbg("%s", "Invalid port");
2252 return -1;
2253 }
2254
2255 mos7840_port = mos7840_get_port_private(port);
2256
2257 if (mos7840_port == NULL)
2258 return -1;
2259
2260 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2261
2262 switch (cmd) {
2263 /* return number of bytes available */
2264
2265 case TIOCSERGETLSR:
2266 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2267 return mos7840_get_lsr_info(tty, argp);
2268
2269 case TIOCGSERIAL:
2270 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2271 return mos7840_get_serial_info(mos7840_port, argp);
2272
2273 case TIOCSSERIAL:
2274 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2275 break;
2276
2277 case TIOCMIWAIT:
2278 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2279 cprev = mos7840_port->icount;
2280 while (1) {
2281 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2282 mos7840_port->delta_msr_cond = 0;
2283 wait_event_interruptible(mos7840_port->delta_msr_wait,
2284 (mos7840_port->
2285 delta_msr_cond == 1));
2286
2287 /* see if a signal did it */
2288 if (signal_pending(current))
2289 return -ERESTARTSYS;
2290 cnow = mos7840_port->icount;
2291 smp_rmb();
2292 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2293 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2294 return -EIO; /* no change => error */
2295 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2296 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2297 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2298 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2299 return 0;
2300 }
2301 cprev = cnow;
2302 }
2303 /* NOTREACHED */
2304 break;
2305
2306 default:
2307 break;
2308 }
2309 return -ENOIOCTLCMD;
2310 }
2311
2312 static int mos7840_calc_num_ports(struct usb_serial *serial)
2313 {
2314 __u16 Data = 0x00;
2315 int ret = 0;
2316 int mos7840_num_ports;
2317
2318 ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2319 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,
2320 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2321
2322 if ((Data & 0x01) == 0) {
2323 mos7840_num_ports = 2;
2324 serial->num_bulk_in = 2;
2325 serial->num_bulk_out = 2;
2326 serial->num_ports = 2;
2327 } else {
2328 mos7840_num_ports = 4;
2329 serial->num_bulk_in = 4;
2330 serial->num_bulk_out = 4;
2331 serial->num_ports = 4;
2332 }
2333
2334 return mos7840_num_ports;
2335 }
2336
2337 /****************************************************************************
2338 * mos7840_startup
2339 ****************************************************************************/
2340
2341 static int mos7840_startup(struct usb_serial *serial)
2342 {
2343 struct moschip_port *mos7840_port;
2344 struct usb_device *dev;
2345 int i, status;
2346
2347 __u16 Data;
2348 dbg("%s", "mos7840_startup :Entering..........");
2349
2350 if (!serial) {
2351 dbg("%s", "Invalid Handler");
2352 return -1;
2353 }
2354
2355 dev = serial->dev;
2356
2357 dbg("%s", "Entering...");
2358 dbg ("mos7840_startup: serial = %p", serial);
2359
2360 /* we set up the pointers to the endpoints in the mos7840_open *
2361 * function, as the structures aren't created yet. */
2362
2363 /* set up port private structures */
2364 for (i = 0; i < serial->num_ports; ++i) {
2365 dbg ("mos7840_startup: configuring port %d............", i);
2366 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2367 if (mos7840_port == NULL) {
2368 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2369 status = -ENOMEM;
2370 i--; /* don't follow NULL pointer cleaning up */
2371 goto error;
2372 }
2373
2374 /* Initialize all port interrupt end point to port 0 int
2375 * endpoint. Our device has only one interrupt end point
2376 * common to all port */
2377
2378 mos7840_port->port = serial->port[i];
2379 mos7840_set_port_private(serial->port[i], mos7840_port);
2380 spin_lock_init(&mos7840_port->pool_lock);
2381
2382 /* minor is not initialised until later by
2383 * usb-serial.c:get_free_serial() and cannot therefore be used
2384 * to index device instances */
2385 mos7840_port->port_num = i + 1;
2386 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2387 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2388 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2389 dbg ("serial->minor = %d", serial->minor);
2390
2391 if (mos7840_port->port_num == 1) {
2392 mos7840_port->SpRegOffset = 0x0;
2393 mos7840_port->ControlRegOffset = 0x1;
2394 mos7840_port->DcrRegOffset = 0x4;
2395 } else if ((mos7840_port->port_num == 2)
2396 && (serial->num_ports == 4)) {
2397 mos7840_port->SpRegOffset = 0x8;
2398 mos7840_port->ControlRegOffset = 0x9;
2399 mos7840_port->DcrRegOffset = 0x16;
2400 } else if ((mos7840_port->port_num == 2)
2401 && (serial->num_ports == 2)) {
2402 mos7840_port->SpRegOffset = 0xa;
2403 mos7840_port->ControlRegOffset = 0xb;
2404 mos7840_port->DcrRegOffset = 0x19;
2405 } else if ((mos7840_port->port_num == 3)
2406 && (serial->num_ports == 4)) {
2407 mos7840_port->SpRegOffset = 0xa;
2408 mos7840_port->ControlRegOffset = 0xb;
2409 mos7840_port->DcrRegOffset = 0x19;
2410 } else if ((mos7840_port->port_num == 4)
2411 && (serial->num_ports == 4)) {
2412 mos7840_port->SpRegOffset = 0xc;
2413 mos7840_port->ControlRegOffset = 0xd;
2414 mos7840_port->DcrRegOffset = 0x1c;
2415 }
2416 mos7840_dump_serial_port(mos7840_port);
2417 mos7840_set_port_private(serial->port[i], mos7840_port);
2418
2419 /* enable rx_disable bit in control register */
2420 status = mos7840_get_reg_sync(serial->port[i],
2421 mos7840_port->ControlRegOffset, &Data);
2422 if (status < 0) {
2423 dbg("Reading ControlReg failed status-0x%x", status);
2424 break;
2425 } else
2426 dbg("ControlReg Reading success val is %x, status%d",
2427 Data, status);
2428 Data |= 0x08; /* setting driver done bit */
2429 Data |= 0x04; /* sp1_bit to have cts change reflect in
2430 modem status reg */
2431
2432 /* Data |= 0x20; //rx_disable bit */
2433 status = mos7840_set_reg_sync(serial->port[i],
2434 mos7840_port->ControlRegOffset, Data);
2435 if (status < 0) {
2436 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2437 break;
2438 } else
2439 dbg("ControlReg Writing success(rx_disable) status%d",
2440 status);
2441
2442 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2443 and 0x24 in DCR3 */
2444 Data = 0x01;
2445 status = mos7840_set_reg_sync(serial->port[i],
2446 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2447 if (status < 0) {
2448 dbg("Writing DCR0 failed status-0x%x", status);
2449 break;
2450 } else
2451 dbg("DCR0 Writing success status%d", status);
2452
2453 Data = 0x05;
2454 status = mos7840_set_reg_sync(serial->port[i],
2455 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2456 if (status < 0) {
2457 dbg("Writing DCR1 failed status-0x%x", status);
2458 break;
2459 } else
2460 dbg("DCR1 Writing success status%d", status);
2461
2462 Data = 0x24;
2463 status = mos7840_set_reg_sync(serial->port[i],
2464 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2465 if (status < 0) {
2466 dbg("Writing DCR2 failed status-0x%x", status);
2467 break;
2468 } else
2469 dbg("DCR2 Writing success status%d", status);
2470
2471 /* write values in clkstart0x0 and clkmulti 0x20 */
2472 Data = 0x0;
2473 status = mos7840_set_reg_sync(serial->port[i],
2474 CLK_START_VALUE_REGISTER, Data);
2475 if (status < 0) {
2476 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2477 break;
2478 } else
2479 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2480
2481 Data = 0x20;
2482 status = mos7840_set_reg_sync(serial->port[i],
2483 CLK_MULTI_REGISTER, Data);
2484 if (status < 0) {
2485 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2486 status);
2487 goto error;
2488 } else
2489 dbg("CLK_MULTI_REGISTER Writing success status%d",
2490 status);
2491
2492 /* write value 0x0 to scratchpad register */
2493 Data = 0x00;
2494 status = mos7840_set_uart_reg(serial->port[i],
2495 SCRATCH_PAD_REGISTER, Data);
2496 if (status < 0) {
2497 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2498 status);
2499 break;
2500 } else
2501 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2502 status);
2503
2504 /* Zero Length flag register */
2505 if ((mos7840_port->port_num != 1)
2506 && (serial->num_ports == 2)) {
2507
2508 Data = 0xff;
2509 status = mos7840_set_reg_sync(serial->port[i],
2510 (__u16) (ZLP_REG1 +
2511 ((__u16)mos7840_port->port_num)), Data);
2512 dbg("ZLIP offset %x",
2513 (__u16) (ZLP_REG1 +
2514 ((__u16) mos7840_port->port_num)));
2515 if (status < 0) {
2516 dbg("Writing ZLP_REG%d failed status-0x%x",
2517 i + 2, status);
2518 break;
2519 } else
2520 dbg("ZLP_REG%d Writing success status%d",
2521 i + 2, status);
2522 } else {
2523 Data = 0xff;
2524 status = mos7840_set_reg_sync(serial->port[i],
2525 (__u16) (ZLP_REG1 +
2526 ((__u16)mos7840_port->port_num) - 0x1), Data);
2527 dbg("ZLIP offset %x",
2528 (__u16) (ZLP_REG1 +
2529 ((__u16) mos7840_port->port_num) - 0x1));
2530 if (status < 0) {
2531 dbg("Writing ZLP_REG%d failed status-0x%x",
2532 i + 1, status);
2533 break;
2534 } else
2535 dbg("ZLP_REG%d Writing success status%d",
2536 i + 1, status);
2537
2538 }
2539 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2540 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2541 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2542 GFP_KERNEL);
2543 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2544 !mos7840_port->dr) {
2545 status = -ENOMEM;
2546 goto error;
2547 }
2548 }
2549 dbg ("mos7840_startup: all ports configured...........");
2550
2551 /* Zero Length flag enable */
2552 Data = 0x0f;
2553 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2554 if (status < 0) {
2555 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2556 goto error;
2557 } else
2558 dbg("ZLP_REG5 Writing success status%d", status);
2559
2560 /* setting configuration feature to one */
2561 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2562 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2563 return 0;
2564 error:
2565 for (/* nothing */; i >= 0; i--) {
2566 mos7840_port = mos7840_get_port_private(serial->port[i]);
2567
2568 kfree(mos7840_port->dr);
2569 kfree(mos7840_port->ctrl_buf);
2570 usb_free_urb(mos7840_port->control_urb);
2571 kfree(mos7840_port);
2572 }
2573 return status;
2574 }
2575
2576 /****************************************************************************
2577 * mos7840_disconnect
2578 * This function is called whenever the device is removed from the usb bus.
2579 ****************************************************************************/
2580
2581 static void mos7840_disconnect(struct usb_serial *serial)
2582 {
2583 int i;
2584 unsigned long flags;
2585 struct moschip_port *mos7840_port;
2586 dbg("%s", " disconnect :entering..........");
2587
2588 if (!serial) {
2589 dbg("%s", "Invalid Handler");
2590 return;
2591 }
2592
2593 /* check for the ports to be closed,close the ports and disconnect */
2594
2595 /* free private structure allocated for serial port *
2596 * stop reads and writes on all ports */
2597
2598 for (i = 0; i < serial->num_ports; ++i) {
2599 mos7840_port = mos7840_get_port_private(serial->port[i]);
2600 dbg ("mos7840_port %d = %p", i, mos7840_port);
2601 if (mos7840_port) {
2602 usb_kill_urb(mos7840_port->control_urb);
2603 }
2604 }
2605
2606 dbg("%s", "Thank u :: ");
2607
2608 }
2609
2610 /****************************************************************************
2611 * mos7840_release
2612 * This function is called when the usb_serial structure is freed.
2613 ****************************************************************************/
2614
2615 static void mos7840_release(struct usb_serial *serial)
2616 {
2617 int i;
2618 struct moschip_port *mos7840_port;
2619 dbg("%s", " release :entering..........");
2620
2621 if (!serial) {
2622 dbg("%s", "Invalid Handler");
2623 return;
2624 }
2625
2626 /* check for the ports to be closed,close the ports and disconnect */
2627
2628 /* free private structure allocated for serial port *
2629 * stop reads and writes on all ports */
2630
2631 for (i = 0; i < serial->num_ports; ++i) {
2632 mos7840_port = mos7840_get_port_private(serial->port[i]);
2633 dbg("mos7840_port %d = %p", i, mos7840_port);
2634 if (mos7840_port) {
2635 usb_free_urb(mos7840_port->control_urb);
2636 kfree(mos7840_port->ctrl_buf);
2637 kfree(mos7840_port->dr);
2638 kfree(mos7840_port);
2639 }
2640 }
2641
2642 dbg("%s", "Thank u :: ");
2643
2644 }
2645
2646 static struct usb_driver io_driver = {
2647 .name = "mos7840",
2648 .probe = usb_serial_probe,
2649 .disconnect = usb_serial_disconnect,
2650 .id_table = moschip_id_table_combined,
2651 };
2652
2653 static struct usb_serial_driver moschip7840_4port_device = {
2654 .driver = {
2655 .owner = THIS_MODULE,
2656 .name = "mos7840",
2657 },
2658 .description = DRIVER_DESC,
2659 .id_table = moschip_port_id_table,
2660 .num_ports = 4,
2661 .open = mos7840_open,
2662 .close = mos7840_close,
2663 .write = mos7840_write,
2664 .write_room = mos7840_write_room,
2665 .chars_in_buffer = mos7840_chars_in_buffer,
2666 .throttle = mos7840_throttle,
2667 .unthrottle = mos7840_unthrottle,
2668 .calc_num_ports = mos7840_calc_num_ports,
2669 #ifdef MCSSerialProbe
2670 .probe = mos7840_serial_probe,
2671 #endif
2672 .ioctl = mos7840_ioctl,
2673 .set_termios = mos7840_set_termios,
2674 .break_ctl = mos7840_break,
2675 .tiocmget = mos7840_tiocmget,
2676 .tiocmset = mos7840_tiocmset,
2677 .get_icount = mos7840_get_icount,
2678 .attach = mos7840_startup,
2679 .disconnect = mos7840_disconnect,
2680 .release = mos7840_release,
2681 .read_bulk_callback = mos7840_bulk_in_callback,
2682 .read_int_callback = mos7840_interrupt_callback,
2683 };
2684
2685 static struct usb_serial_driver * const serial_drivers[] = {
2686 &moschip7840_4port_device, NULL
2687 };
2688
2689 module_usb_serial_driver(io_driver, serial_drivers);
2690
2691 MODULE_DESCRIPTION(DRIVER_DESC);
2692 MODULE_LICENSE("GPL");
2693
2694 module_param(debug, bool, S_IRUGO | S_IWUSR);
2695 MODULE_PARM_DESC(debug, "Debug enabled or not");
Linux with added FPC-III support