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Merge 4.11-rc4 into tty-next
[linux/fpc-iii.git] / drivers / usb / serial / mos7840.c
blob3821c53fcee9ec2c269ce562ef25d7a67ed34965
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/slab.h>
28 #include <linux/tty.h>
29 #include <linux/tty_driver.h>
30 #include <linux/tty_flip.h>
31 #include <linux/module.h>
32 #include <linux/serial.h>
33 #include <linux/usb.h>
34 #include <linux/usb/serial.h>
35 #include <linux/uaccess.h>
36
37 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
38
39 /*
40 * 16C50 UART register defines
41 */
42
43 #define LCR_BITS_5 0x00 /* 5 bits/char */
44 #define LCR_BITS_6 0x01 /* 6 bits/char */
45 #define LCR_BITS_7 0x02 /* 7 bits/char */
46 #define LCR_BITS_8 0x03 /* 8 bits/char */
47 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
48
49 #define LCR_STOP_1 0x00 /* 1 stop bit */
50 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
51 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
52 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
53
54 #define LCR_PAR_NONE 0x00 /* No parity */
55 #define LCR_PAR_ODD 0x08 /* Odd parity */
56 #define LCR_PAR_EVEN 0x18 /* Even parity */
57 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
58 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
59 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
60
61 #define LCR_SET_BREAK 0x40 /* Set Break condition */
62 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
63
64 #define MCR_DTR 0x01 /* Assert DTR */
65 #define MCR_RTS 0x02 /* Assert RTS */
66 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
67 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
68 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
69 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
70
71 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
72 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
73 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
74 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
75
76 /*
77 * Defines used for sending commands to port
78 */
79
80 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
81
82 #define MOS_PORT1 0x0200
83 #define MOS_PORT2 0x0300
84 #define MOS_VENREG 0x0000
85 #define MOS_MAX_PORT 0x02
86 #define MOS_WRITE 0x0E
87 #define MOS_READ 0x0D
88
89 /* Requests */
90 #define MCS_RD_RTYPE 0xC0
91 #define MCS_WR_RTYPE 0x40
92 #define MCS_RDREQ 0x0D
93 #define MCS_WRREQ 0x0E
94 #define MCS_CTRL_TIMEOUT 500
95 #define VENDOR_READ_LENGTH (0x01)
96
97 #define MAX_NAME_LEN 64
98
99 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
100 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
101
102 /* For higher baud Rates use TIOCEXBAUD */
103 #define TIOCEXBAUD 0x5462
104
105 /* vendor id and device id defines */
106
107 /* The native mos7840/7820 component */
108 #define USB_VENDOR_ID_MOSCHIP 0x9710
109 #define MOSCHIP_DEVICE_ID_7840 0x7840
110 #define MOSCHIP_DEVICE_ID_7820 0x7820
111 #define MOSCHIP_DEVICE_ID_7810 0x7810
112 /* The native component can have its vendor/device id's overridden
113 * in vendor-specific implementations. Such devices can be handled
114 * by making a change here, in id_table.
115 */
116 #define USB_VENDOR_ID_BANDB 0x0856
117 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
118 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
119 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
120 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
121 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
122 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
123 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
124 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
125 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
126 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
127 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
128 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
129 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
130
131 /* This driver also supports
132 * ATEN UC2324 device using Moschip MCS7840
133 * ATEN UC2322 device using Moschip MCS7820
134 */
135 #define USB_VENDOR_ID_ATENINTL 0x0557
136 #define ATENINTL_DEVICE_ID_UC2324 0x2011
137 #define ATENINTL_DEVICE_ID_UC2322 0x7820
138
139 /* Interrupt Routine Defines */
140
141 #define SERIAL_IIR_RLS 0x06
142 #define SERIAL_IIR_MS 0x00
143
144 /*
145 * Emulation of the bit mask on the LINE STATUS REGISTER.
146 */
147 #define SERIAL_LSR_DR 0x0001
148 #define SERIAL_LSR_OE 0x0002
149 #define SERIAL_LSR_PE 0x0004
150 #define SERIAL_LSR_FE 0x0008
151 #define SERIAL_LSR_BI 0x0010
152
153 #define MOS_MSR_DELTA_CTS 0x10
154 #define MOS_MSR_DELTA_DSR 0x20
155 #define MOS_MSR_DELTA_RI 0x40
156 #define MOS_MSR_DELTA_CD 0x80
157
158 /* Serial Port register Address */
159 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
160 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
161 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
162 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
163 #define LINE_STATUS_REGISTER ((__u16)(0x05))
164 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
165 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
166 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
167 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
168
169 #define CLK_MULTI_REGISTER ((__u16)(0x02))
170 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
171 #define GPIO_REGISTER ((__u16)(0x07))
172
173 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
174
175 /*
176 * URB POOL related defines
177 */
178 #define NUM_URBS 16 /* URB Count */
179 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
180
181 /* LED on/off milliseconds*/
182 #define LED_ON_MS 500
183 #define LED_OFF_MS 500
184
185 enum mos7840_flag {
186 MOS7840_FLAG_CTRL_BUSY,
187 MOS7840_FLAG_LED_BUSY,
188 };
189
190 static const struct usb_device_id id_table[] = {
191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
207 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
209 {} /* terminating entry */
210 };
211 MODULE_DEVICE_TABLE(usb, id_table);
212
213 /* This structure holds all of the local port information */
214
215 struct moschip_port {
216 int port_num; /*Actual port number in the device(1,2,etc) */
217 struct urb *read_urb; /* read URB for this port */
218 __u8 shadowLCR; /* last LCR value received */
219 __u8 shadowMCR; /* last MCR value received */
220 char open;
221 char open_ports;
222 struct usb_serial_port *port; /* loop back to the owner of this object */
223
224 /* Offsets */
225 __u8 SpRegOffset;
226 __u8 ControlRegOffset;
227 __u8 DcrRegOffset;
228 /* for processing control URBS in interrupt context */
229 struct urb *control_urb;
230 struct usb_ctrlrequest *dr;
231 char *ctrl_buf;
232 int MsrLsr;
233
234 spinlock_t pool_lock;
235 struct urb *write_urb_pool[NUM_URBS];
236 char busy[NUM_URBS];
237 bool read_urb_busy;
238
239 /* For device(s) with LED indicator */
240 bool has_led;
241 struct timer_list led_timer1; /* Timer for LED on */
242 struct timer_list led_timer2; /* Timer for LED off */
243 struct urb *led_urb;
244 struct usb_ctrlrequest *led_dr;
245
246 unsigned long flags;
247 };
248
249 /*
250 * mos7840_set_reg_sync
251 * To set the Control register by calling usb_fill_control_urb function
252 * by passing usb_sndctrlpipe function as parameter.
253 */
254
255 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
256 __u16 val)
257 {
258 struct usb_device *dev = port->serial->dev;
259 val = val & 0x00ff;
260 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
261
262 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
263 MCS_WR_RTYPE, val, reg, NULL, 0,
264 MOS_WDR_TIMEOUT);
265 }
266
267 /*
268 * mos7840_get_reg_sync
269 * To set the Uart register by calling usb_fill_control_urb function by
270 * passing usb_rcvctrlpipe function as parameter.
271 */
272
273 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
274 __u16 *val)
275 {
276 struct usb_device *dev = port->serial->dev;
277 int ret = 0;
278 u8 *buf;
279
280 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
281 if (!buf)
282 return -ENOMEM;
283
284 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
285 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
286 MOS_WDR_TIMEOUT);
287 if (ret < VENDOR_READ_LENGTH) {
288 if (ret >= 0)
289 ret = -EIO;
290 goto out;
291 }
292
293 *val = buf[0];
294 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
295 out:
296 kfree(buf);
297 return ret;
298 }
299
300 /*
301 * mos7840_set_uart_reg
302 * To set the Uart register by calling usb_fill_control_urb function by
303 * passing usb_sndctrlpipe function as parameter.
304 */
305
306 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
307 __u16 val)
308 {
309
310 struct usb_device *dev = port->serial->dev;
311 val = val & 0x00ff;
312 /* For the UART control registers, the application number need
313 to be Or'ed */
314 if (port->serial->num_ports == 4) {
315 val |= ((__u16)port->port_number + 1) << 8;
316 } else {
317 if (port->port_number == 0) {
318 val |= ((__u16)port->port_number + 1) << 8;
319 } else {
320 val |= ((__u16)port->port_number + 2) << 8;
321 }
322 }
323 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
324 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
325 MCS_WR_RTYPE, val, reg, NULL, 0,
326 MOS_WDR_TIMEOUT);
327
328 }
329
330 /*
331 * mos7840_get_uart_reg
332 * To set the Control register by calling usb_fill_control_urb function
333 * by passing usb_rcvctrlpipe function as parameter.
334 */
335 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
336 __u16 *val)
337 {
338 struct usb_device *dev = port->serial->dev;
339 int ret = 0;
340 __u16 Wval;
341 u8 *buf;
342
343 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
344 if (!buf)
345 return -ENOMEM;
346
347 /* Wval is same as application number */
348 if (port->serial->num_ports == 4) {
349 Wval = ((__u16)port->port_number + 1) << 8;
350 } else {
351 if (port->port_number == 0) {
352 Wval = ((__u16)port->port_number + 1) << 8;
353 } else {
354 Wval = ((__u16)port->port_number + 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 if (ret < VENDOR_READ_LENGTH) {
362 if (ret >= 0)
363 ret = -EIO;
364 goto out;
365 }
366 *val = buf[0];
367 out:
368 kfree(buf);
369 return ret;
370 }
371
372 static void mos7840_dump_serial_port(struct usb_serial_port *port,
373 struct moschip_port *mos7840_port)
374 {
375
376 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
377 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
378 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
379
380 }
381
382 /************************************************************************/
383 /************************************************************************/
384 /* I N T E R F A C E F U N C T I O N S */
385 /* I N T E R F A C E F U N C T I O N S */
386 /************************************************************************/
387 /************************************************************************/
388
389 static inline void mos7840_set_port_private(struct usb_serial_port *port,
390 struct moschip_port *data)
391 {
392 usb_set_serial_port_data(port, (void *)data);
393 }
394
395 static inline struct moschip_port *mos7840_get_port_private(struct
396 usb_serial_port
397 *port)
398 {
399 return (struct moschip_port *)usb_get_serial_port_data(port);
400 }
401
402 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
403 {
404 struct moschip_port *mos7840_port;
405 struct async_icount *icount;
406 mos7840_port = port;
407 if (new_msr &
408 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
409 MOS_MSR_DELTA_CD)) {
410 icount = &mos7840_port->port->icount;
411
412 /* update input line counters */
413 if (new_msr & MOS_MSR_DELTA_CTS)
414 icount->cts++;
415 if (new_msr & MOS_MSR_DELTA_DSR)
416 icount->dsr++;
417 if (new_msr & MOS_MSR_DELTA_CD)
418 icount->dcd++;
419 if (new_msr & MOS_MSR_DELTA_RI)
420 icount->rng++;
421
422 wake_up_interruptible(&port->port->port.delta_msr_wait);
423 }
424 }
425
426 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
427 {
428 struct async_icount *icount;
429
430 if (new_lsr & SERIAL_LSR_BI) {
431 /*
432 * Parity and Framing errors only count if they
433 * occur exclusive of a break being
434 * received.
435 */
436 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
437 }
438
439 /* update input line counters */
440 icount = &port->port->icount;
441 if (new_lsr & SERIAL_LSR_BI)
442 icount->brk++;
443 if (new_lsr & SERIAL_LSR_OE)
444 icount->overrun++;
445 if (new_lsr & SERIAL_LSR_PE)
446 icount->parity++;
447 if (new_lsr & SERIAL_LSR_FE)
448 icount->frame++;
449 }
450
451 /************************************************************************/
452 /************************************************************************/
453 /* U S B C A L L B A C K F U N C T I O N S */
454 /* U S B C A L L B A C K F U N C T I O N S */
455 /************************************************************************/
456 /************************************************************************/
457
458 static void mos7840_control_callback(struct urb *urb)
459 {
460 unsigned char *data;
461 struct moschip_port *mos7840_port;
462 struct device *dev = &urb->dev->dev;
463 __u8 regval = 0x0;
464 int status = urb->status;
465
466 mos7840_port = urb->context;
467
468 switch (status) {
469 case 0:
470 /* success */
471 break;
472 case -ECONNRESET:
473 case -ENOENT:
474 case -ESHUTDOWN:
475 /* this urb is terminated, clean up */
476 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
477 goto out;
478 default:
479 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
480 goto out;
481 }
482
483 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
484 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
485 mos7840_port->MsrLsr, mos7840_port->port_num);
486 data = urb->transfer_buffer;
487 regval = (__u8) data[0];
488 dev_dbg(dev, "%s data is %x\n", __func__, regval);
489 if (mos7840_port->MsrLsr == 0)
490 mos7840_handle_new_msr(mos7840_port, regval);
491 else if (mos7840_port->MsrLsr == 1)
492 mos7840_handle_new_lsr(mos7840_port, regval);
493 out:
494 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
495 }
496
497 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
498 __u16 *val)
499 {
500 struct usb_device *dev = mcs->port->serial->dev;
501 struct usb_ctrlrequest *dr = mcs->dr;
502 unsigned char *buffer = mcs->ctrl_buf;
503 int ret;
504
505 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
506 return -EBUSY;
507
508 dr->bRequestType = MCS_RD_RTYPE;
509 dr->bRequest = MCS_RDREQ;
510 dr->wValue = cpu_to_le16(Wval); /* 0 */
511 dr->wIndex = cpu_to_le16(reg);
512 dr->wLength = cpu_to_le16(2);
513
514 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
515 (unsigned char *)dr, buffer, 2,
516 mos7840_control_callback, mcs);
517 mcs->control_urb->transfer_buffer_length = 2;
518 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
519 if (ret)
520 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
521
522 return ret;
523 }
524
525 static void mos7840_set_led_callback(struct urb *urb)
526 {
527 switch (urb->status) {
528 case 0:
529 /* Success */
530 break;
531 case -ECONNRESET:
532 case -ENOENT:
533 case -ESHUTDOWN:
534 /* This urb is terminated, clean up */
535 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n",
536 __func__, urb->status);
537 break;
538 default:
539 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n",
540 __func__, urb->status);
541 }
542 }
543
544 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
545 __u16 reg)
546 {
547 struct usb_device *dev = mcs->port->serial->dev;
548 struct usb_ctrlrequest *dr = mcs->led_dr;
549
550 dr->bRequestType = MCS_WR_RTYPE;
551 dr->bRequest = MCS_WRREQ;
552 dr->wValue = cpu_to_le16(wval);
553 dr->wIndex = cpu_to_le16(reg);
554 dr->wLength = cpu_to_le16(0);
555
556 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
557 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
558
559 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
560 }
561
562 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
563 __u16 val)
564 {
565 struct usb_device *dev = port->serial->dev;
566
567 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
568 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
569 }
570
571 static void mos7840_led_off(unsigned long arg)
572 {
573 struct moschip_port *mcs = (struct moschip_port *) arg;
574
575 /* Turn off LED */
576 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
577 mod_timer(&mcs->led_timer2,
578 jiffies + msecs_to_jiffies(LED_OFF_MS));
579 }
580
581 static void mos7840_led_flag_off(unsigned long arg)
582 {
583 struct moschip_port *mcs = (struct moschip_port *) arg;
584
585 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
586 }
587
588 static void mos7840_led_activity(struct usb_serial_port *port)
589 {
590 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
591
592 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
593 return;
594
595 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
596 mod_timer(&mos7840_port->led_timer1,
597 jiffies + msecs_to_jiffies(LED_ON_MS));
598 }
599
600 /*****************************************************************************
601 * mos7840_interrupt_callback
602 * this is the callback function for when we have received data on the
603 * interrupt endpoint.
604 *****************************************************************************/
605
606 static void mos7840_interrupt_callback(struct urb *urb)
607 {
608 int result;
609 int length;
610 struct moschip_port *mos7840_port;
611 struct usb_serial *serial;
612 __u16 Data;
613 unsigned char *data;
614 __u8 sp[5], st;
615 int i, rv = 0;
616 __u16 wval, wreg = 0;
617 int status = urb->status;
618
619 switch (status) {
620 case 0:
621 /* success */
622 break;
623 case -ECONNRESET:
624 case -ENOENT:
625 case -ESHUTDOWN:
626 /* this urb is terminated, clean up */
627 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
628 __func__, status);
629 return;
630 default:
631 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
632 __func__, status);
633 goto exit;
634 }
635
636 length = urb->actual_length;
637 data = urb->transfer_buffer;
638
639 serial = urb->context;
640
641 /* Moschip get 5 bytes
642 * Byte 1 IIR Port 1 (port.number is 0)
643 * Byte 2 IIR Port 2 (port.number is 1)
644 * Byte 3 IIR Port 3 (port.number is 2)
645 * Byte 4 IIR Port 4 (port.number is 3)
646 * Byte 5 FIFO status for both */
647
648 if (length > 5) {
649 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
650 return;
651 }
652
653 sp[0] = (__u8) data[0];
654 sp[1] = (__u8) data[1];
655 sp[2] = (__u8) data[2];
656 sp[3] = (__u8) data[3];
657 st = (__u8) data[4];
658
659 for (i = 0; i < serial->num_ports; i++) {
660 mos7840_port = mos7840_get_port_private(serial->port[i]);
661 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
662 if (mos7840_port->open) {
663 if (sp[i] & 0x01) {
664 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
665 } else {
666 switch (sp[i] & 0x0f) {
667 case SERIAL_IIR_RLS:
668 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
669 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
670 mos7840_port->MsrLsr = 1;
671 wreg = LINE_STATUS_REGISTER;
672 break;
673 case SERIAL_IIR_MS:
674 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
675 mos7840_port->MsrLsr = 0;
676 wreg = MODEM_STATUS_REGISTER;
677 break;
678 }
679 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
680 }
681 }
682 }
683 if (!(rv < 0))
684 /* the completion handler for the control urb will resubmit */
685 return;
686 exit:
687 result = usb_submit_urb(urb, GFP_ATOMIC);
688 if (result) {
689 dev_err(&urb->dev->dev,
690 "%s - Error %d submitting interrupt urb\n",
691 __func__, result);
692 }
693 }
694
695 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
696 const char *function)
697 {
698 if (!port) {
699 pr_debug("%s - port == NULL\n", function);
700 return -1;
701 }
702 if (!port->serial) {
703 pr_debug("%s - port->serial == NULL\n", function);
704 return -1;
705 }
706
707 return 0;
708 }
709
710 /* Inline functions to check the sanity of a pointer that is passed to us */
711 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
712 const char *function)
713 {
714 if (!serial) {
715 pr_debug("%s - serial == NULL\n", function);
716 return -1;
717 }
718 if (!serial->type) {
719 pr_debug("%s - serial->type == NULL!\n", function);
720 return -1;
721 }
722
723 return 0;
724 }
725
726 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
727 const char *function)
728 {
729 /* if no port was specified, or it fails a paranoia check */
730 if (!port ||
731 mos7840_port_paranoia_check(port, function) ||
732 mos7840_serial_paranoia_check(port->serial, function)) {
733 /* then say that we don't have a valid usb_serial thing,
734 * which will end up genrating -ENODEV return values */
735 return NULL;
736 }
737
738 return port->serial;
739 }
740
741 /*****************************************************************************
742 * mos7840_bulk_in_callback
743 * this is the callback function for when we have received data on the
744 * bulk in endpoint.
745 *****************************************************************************/
746
747 static void mos7840_bulk_in_callback(struct urb *urb)
748 {
749 int retval;
750 unsigned char *data;
751 struct usb_serial *serial;
752 struct usb_serial_port *port;
753 struct moschip_port *mos7840_port;
754 int status = urb->status;
755
756 mos7840_port = urb->context;
757 if (!mos7840_port)
758 return;
759
760 if (status) {
761 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
762 mos7840_port->read_urb_busy = false;
763 return;
764 }
765
766 port = mos7840_port->port;
767 if (mos7840_port_paranoia_check(port, __func__)) {
768 mos7840_port->read_urb_busy = false;
769 return;
770 }
771
772 serial = mos7840_get_usb_serial(port, __func__);
773 if (!serial) {
774 mos7840_port->read_urb_busy = false;
775 return;
776 }
777
778 data = urb->transfer_buffer;
779 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
780
781 if (urb->actual_length) {
782 struct tty_port *tport = &mos7840_port->port->port;
783 tty_insert_flip_string(tport, data, urb->actual_length);
784 tty_flip_buffer_push(tport);
785 port->icount.rx += urb->actual_length;
786 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
787 }
788
789 if (!mos7840_port->read_urb) {
790 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
791 mos7840_port->read_urb_busy = false;
792 return;
793 }
794
795 if (mos7840_port->has_led)
796 mos7840_led_activity(port);
797
798 mos7840_port->read_urb_busy = true;
799 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
800
801 if (retval) {
802 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
803 mos7840_port->read_urb_busy = false;
804 }
805 }
806
807 /*****************************************************************************
808 * mos7840_bulk_out_data_callback
809 * this is the callback function for when we have finished sending
810 * serial data on the bulk out endpoint.
811 *****************************************************************************/
812
813 static void mos7840_bulk_out_data_callback(struct urb *urb)
814 {
815 struct moschip_port *mos7840_port;
816 struct usb_serial_port *port;
817 int status = urb->status;
818 int i;
819
820 mos7840_port = urb->context;
821 port = mos7840_port->port;
822 spin_lock(&mos7840_port->pool_lock);
823 for (i = 0; i < NUM_URBS; i++) {
824 if (urb == mos7840_port->write_urb_pool[i]) {
825 mos7840_port->busy[i] = 0;
826 break;
827 }
828 }
829 spin_unlock(&mos7840_port->pool_lock);
830
831 if (status) {
832 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
833 return;
834 }
835
836 if (mos7840_port_paranoia_check(port, __func__))
837 return;
838
839 if (mos7840_port->open)
840 tty_port_tty_wakeup(&port->port);
841
842 }
843
844 /************************************************************************/
845 /* 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 */
846 /************************************************************************/
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 if (!urb)
889 continue;
890
891 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
892 GFP_KERNEL);
893 if (!urb->transfer_buffer) {
894 usb_free_urb(urb);
895 mos7840_port->write_urb_pool[j] = NULL;
896 continue;
897 }
898 }
899
900 /*****************************************************************************
901 * Initialize MCS7840 -- Write Init values to corresponding Registers
902 *
903 * Register Index
904 * 1 : IER
905 * 2 : FCR
906 * 3 : LCR
907 * 4 : MCR
908 *
909 * 0x08 : SP1/2 Control Reg
910 *****************************************************************************/
911
912 /* NEED to check the following Block */
913
914 Data = 0x0;
915 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
916 if (status < 0) {
917 dev_dbg(&port->dev, "Reading Spreg failed\n");
918 goto err;
919 }
920 Data |= 0x80;
921 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
922 if (status < 0) {
923 dev_dbg(&port->dev, "writing Spreg failed\n");
924 goto err;
925 }
926
927 Data &= ~0x80;
928 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
929 if (status < 0) {
930 dev_dbg(&port->dev, "writing Spreg failed\n");
931 goto err;
932 }
933 /* End of block to be checked */
934
935 Data = 0x0;
936 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
937 &Data);
938 if (status < 0) {
939 dev_dbg(&port->dev, "Reading Controlreg failed\n");
940 goto err;
941 }
942 Data |= 0x08; /* Driver done bit */
943 Data |= 0x20; /* rx_disable */
944 status = mos7840_set_reg_sync(port,
945 mos7840_port->ControlRegOffset, Data);
946 if (status < 0) {
947 dev_dbg(&port->dev, "writing Controlreg failed\n");
948 goto err;
949 }
950 /* do register settings here */
951 /* Set all regs to the device default values. */
952 /***********************************
953 * First Disable all interrupts.
954 ***********************************/
955 Data = 0x00;
956 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
957 if (status < 0) {
958 dev_dbg(&port->dev, "disabling interrupts failed\n");
959 goto err;
960 }
961 /* Set FIFO_CONTROL_REGISTER to the default value */
962 Data = 0x00;
963 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
964 if (status < 0) {
965 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
966 goto err;
967 }
968
969 Data = 0xcf;
970 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
971 if (status < 0) {
972 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
973 goto err;
974 }
975
976 Data = 0x03;
977 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
978 mos7840_port->shadowLCR = Data;
979
980 Data = 0x0b;
981 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
982 mos7840_port->shadowMCR = Data;
983
984 Data = 0x00;
985 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
986 mos7840_port->shadowLCR = Data;
987
988 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
989 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
990
991 Data = 0x0c;
992 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
993
994 Data = 0x0;
995 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
996
997 Data = 0x00;
998 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
999
1000 Data = Data & ~SERIAL_LCR_DLAB;
1001 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1002 mos7840_port->shadowLCR = Data;
1003
1004 /* clearing Bulkin and Bulkout Fifo */
1005 Data = 0x0;
1006 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1007
1008 Data = Data | 0x0c;
1009 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1010
1011 Data = Data & ~0x0c;
1012 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1013 /* Finally enable all interrupts */
1014 Data = 0x0c;
1015 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1016
1017 /* clearing rx_disable */
1018 Data = 0x0;
1019 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1020 &Data);
1021 Data = Data & ~0x20;
1022 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1023 Data);
1024
1025 /* rx_negate */
1026 Data = 0x0;
1027 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1028 &Data);
1029 Data = Data | 0x10;
1030 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1031 Data);
1032
1033 /* Check to see if we've set up our endpoint info yet *
1034 * (can't set it up in mos7840_startup as the structures *
1035 * were not set up at that time.) */
1036 if (port0->open_ports == 1) {
1037 /* FIXME: Buffer never NULL, so URB is not submitted. */
1038 if (serial->port[0]->interrupt_in_buffer == NULL) {
1039 /* set up interrupt urb */
1040 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1041 serial->dev,
1042 usb_rcvintpipe(serial->dev,
1043 serial->port[0]->interrupt_in_endpointAddress),
1044 serial->port[0]->interrupt_in_buffer,
1045 serial->port[0]->interrupt_in_urb->
1046 transfer_buffer_length,
1047 mos7840_interrupt_callback,
1048 serial,
1049 serial->port[0]->interrupt_in_urb->interval);
1050
1051 /* start interrupt read for mos7840 */
1052 response =
1053 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1054 GFP_KERNEL);
1055 if (response) {
1056 dev_err(&port->dev, "%s - Error %d submitting "
1057 "interrupt urb\n", __func__, response);
1058 }
1059
1060 }
1061
1062 }
1063
1064 /* see if we've set up our endpoint info yet *
1065 * (can't set it up in mos7840_startup as the *
1066 * structures were not set up at that time.) */
1067
1068 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
1069 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
1070 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1071 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1072 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1073 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1074 mos7840_port->read_urb = port->read_urb;
1075
1076 /* set up our bulk in urb */
1077 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1078 usb_fill_bulk_urb(mos7840_port->read_urb,
1079 serial->dev,
1080 usb_rcvbulkpipe(serial->dev,
1081 (port->bulk_in_endpointAddress) + 2),
1082 port->bulk_in_buffer,
1083 mos7840_port->read_urb->transfer_buffer_length,
1084 mos7840_bulk_in_callback, mos7840_port);
1085 } else {
1086 usb_fill_bulk_urb(mos7840_port->read_urb,
1087 serial->dev,
1088 usb_rcvbulkpipe(serial->dev,
1089 port->bulk_in_endpointAddress),
1090 port->bulk_in_buffer,
1091 mos7840_port->read_urb->transfer_buffer_length,
1092 mos7840_bulk_in_callback, mos7840_port);
1093 }
1094
1095 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1096 mos7840_port->read_urb_busy = true;
1097 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1098 if (response) {
1099 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1100 __func__, response);
1101 mos7840_port->read_urb_busy = false;
1102 }
1103
1104 /* initialize our port settings */
1105 /* Must set to enable ints! */
1106 mos7840_port->shadowMCR = MCR_MASTER_IE;
1107 /* send a open port command */
1108 mos7840_port->open = 1;
1109 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1110
1111 return 0;
1112 err:
1113 for (j = 0; j < NUM_URBS; ++j) {
1114 urb = mos7840_port->write_urb_pool[j];
1115 if (!urb)
1116 continue;
1117 kfree(urb->transfer_buffer);
1118 usb_free_urb(urb);
1119 }
1120 return status;
1121 }
1122
1123 /*****************************************************************************
1124 * mos7840_chars_in_buffer
1125 * this function is called by the tty driver when it wants to know how many
1126 * bytes of data we currently have outstanding in the port (data that has
1127 * been written, but hasn't made it out the port yet)
1128 * If successful, we return the number of bytes left to be written in the
1129 * system,
1130 * Otherwise we return zero.
1131 *****************************************************************************/
1132
1133 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1134 {
1135 struct usb_serial_port *port = tty->driver_data;
1136 int i;
1137 int chars = 0;
1138 unsigned long flags;
1139 struct moschip_port *mos7840_port;
1140
1141 if (mos7840_port_paranoia_check(port, __func__))
1142 return 0;
1143
1144 mos7840_port = mos7840_get_port_private(port);
1145 if (mos7840_port == NULL)
1146 return 0;
1147
1148 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1149 for (i = 0; i < NUM_URBS; ++i) {
1150 if (mos7840_port->busy[i]) {
1151 struct urb *urb = mos7840_port->write_urb_pool[i];
1152 chars += urb->transfer_buffer_length;
1153 }
1154 }
1155 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1156 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1157 return chars;
1158
1159 }
1160
1161 /*****************************************************************************
1162 * mos7840_close
1163 * this function is called by the tty driver when a port is closed
1164 *****************************************************************************/
1165
1166 static void mos7840_close(struct usb_serial_port *port)
1167 {
1168 struct usb_serial *serial;
1169 struct moschip_port *mos7840_port;
1170 struct moschip_port *port0;
1171 int j;
1172 __u16 Data;
1173
1174 if (mos7840_port_paranoia_check(port, __func__))
1175 return;
1176
1177 serial = mos7840_get_usb_serial(port, __func__);
1178 if (!serial)
1179 return;
1180
1181 mos7840_port = mos7840_get_port_private(port);
1182 port0 = mos7840_get_port_private(serial->port[0]);
1183
1184 if (mos7840_port == NULL || port0 == NULL)
1185 return;
1186
1187 for (j = 0; j < NUM_URBS; ++j)
1188 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1189
1190 /* Freeing Write URBs */
1191 for (j = 0; j < NUM_URBS; ++j) {
1192 if (mos7840_port->write_urb_pool[j]) {
1193 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer);
1194 usb_free_urb(mos7840_port->write_urb_pool[j]);
1195 }
1196 }
1197
1198 usb_kill_urb(mos7840_port->read_urb);
1199 mos7840_port->read_urb_busy = false;
1200
1201 port0->open_ports--;
1202 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
1203 if (port0->open_ports == 0) {
1204 if (serial->port[0]->interrupt_in_urb) {
1205 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1206 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1207 }
1208 }
1209
1210 Data = 0x0;
1211 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1212
1213 Data = 0x00;
1214 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1215
1216 mos7840_port->open = 0;
1217 }
1218
1219 /*****************************************************************************
1220 * mos7840_break
1221 * this function sends a break to the port
1222 *****************************************************************************/
1223 static void mos7840_break(struct tty_struct *tty, int break_state)
1224 {
1225 struct usb_serial_port *port = tty->driver_data;
1226 unsigned char data;
1227 struct usb_serial *serial;
1228 struct moschip_port *mos7840_port;
1229
1230 if (mos7840_port_paranoia_check(port, __func__))
1231 return;
1232
1233 serial = mos7840_get_usb_serial(port, __func__);
1234 if (!serial)
1235 return;
1236
1237 mos7840_port = mos7840_get_port_private(port);
1238
1239 if (mos7840_port == NULL)
1240 return;
1241
1242 if (break_state == -1)
1243 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1244 else
1245 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1246
1247 /* FIXME: no locking on shadowLCR anywhere in driver */
1248 mos7840_port->shadowLCR = data;
1249 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1250 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1251 mos7840_port->shadowLCR);
1252 }
1253
1254 /*****************************************************************************
1255 * mos7840_write_room
1256 * this function is called by the tty driver when it wants to know how many
1257 * bytes of data we can accept for a specific port.
1258 * If successful, we return the amount of room that we have for this port
1259 * Otherwise we return a negative error number.
1260 *****************************************************************************/
1261
1262 static int mos7840_write_room(struct tty_struct *tty)
1263 {
1264 struct usb_serial_port *port = tty->driver_data;
1265 int i;
1266 int room = 0;
1267 unsigned long flags;
1268 struct moschip_port *mos7840_port;
1269
1270 if (mos7840_port_paranoia_check(port, __func__))
1271 return -1;
1272
1273 mos7840_port = mos7840_get_port_private(port);
1274 if (mos7840_port == NULL)
1275 return -1;
1276
1277 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1278 for (i = 0; i < NUM_URBS; ++i) {
1279 if (!mos7840_port->busy[i])
1280 room += URB_TRANSFER_BUFFER_SIZE;
1281 }
1282 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1283
1284 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1285 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1286 return room;
1287
1288 }
1289
1290 /*****************************************************************************
1291 * mos7840_write
1292 * this function is called by the tty driver when data should be written to
1293 * the port.
1294 * If successful, we return the number of bytes written, otherwise we
1295 * return a negative error number.
1296 *****************************************************************************/
1297
1298 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1299 const unsigned char *data, int count)
1300 {
1301 int status;
1302 int i;
1303 int bytes_sent = 0;
1304 int transfer_size;
1305 unsigned long flags;
1306
1307 struct moschip_port *mos7840_port;
1308 struct usb_serial *serial;
1309 struct urb *urb;
1310 /* __u16 Data; */
1311 const unsigned char *current_position = data;
1312 unsigned char *data1;
1313
1314 if (mos7840_port_paranoia_check(port, __func__))
1315 return -1;
1316
1317 serial = port->serial;
1318 if (mos7840_serial_paranoia_check(serial, __func__))
1319 return -1;
1320
1321 mos7840_port = mos7840_get_port_private(port);
1322 if (mos7840_port == NULL)
1323 return -1;
1324
1325 /* try to find a free urb in the list */
1326 urb = NULL;
1327
1328 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1329 for (i = 0; i < NUM_URBS; ++i) {
1330 if (!mos7840_port->busy[i]) {
1331 mos7840_port->busy[i] = 1;
1332 urb = mos7840_port->write_urb_pool[i];
1333 dev_dbg(&port->dev, "URB:%d\n", i);
1334 break;
1335 }
1336 }
1337 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1338
1339 if (urb == NULL) {
1340 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1341 goto exit;
1342 }
1343
1344 if (urb->transfer_buffer == NULL) {
1345 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
1346 GFP_ATOMIC);
1347 if (!urb->transfer_buffer)
1348 goto exit;
1349 }
1350 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1351
1352 memcpy(urb->transfer_buffer, current_position, transfer_size);
1353
1354 /* fill urb with data and submit */
1355 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1356 usb_fill_bulk_urb(urb,
1357 serial->dev,
1358 usb_sndbulkpipe(serial->dev,
1359 (port->bulk_out_endpointAddress) + 2),
1360 urb->transfer_buffer,
1361 transfer_size,
1362 mos7840_bulk_out_data_callback, mos7840_port);
1363 } else {
1364 usb_fill_bulk_urb(urb,
1365 serial->dev,
1366 usb_sndbulkpipe(serial->dev,
1367 port->bulk_out_endpointAddress),
1368 urb->transfer_buffer,
1369 transfer_size,
1370 mos7840_bulk_out_data_callback, mos7840_port);
1371 }
1372
1373 data1 = urb->transfer_buffer;
1374 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1375
1376 if (mos7840_port->has_led)
1377 mos7840_led_activity(port);
1378
1379 /* send it down the pipe */
1380 status = usb_submit_urb(urb, GFP_ATOMIC);
1381
1382 if (status) {
1383 mos7840_port->busy[i] = 0;
1384 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1385 "with status = %d\n", __func__, status);
1386 bytes_sent = status;
1387 goto exit;
1388 }
1389 bytes_sent = transfer_size;
1390 port->icount.tx += transfer_size;
1391 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
1392 exit:
1393 return bytes_sent;
1394
1395 }
1396
1397 /*****************************************************************************
1398 * mos7840_throttle
1399 * this function is called by the tty driver when it wants to stop the data
1400 * being read from the port.
1401 *****************************************************************************/
1402
1403 static void mos7840_throttle(struct tty_struct *tty)
1404 {
1405 struct usb_serial_port *port = tty->driver_data;
1406 struct moschip_port *mos7840_port;
1407 int status;
1408
1409 if (mos7840_port_paranoia_check(port, __func__))
1410 return;
1411
1412 mos7840_port = mos7840_get_port_private(port);
1413
1414 if (mos7840_port == NULL)
1415 return;
1416
1417 if (!mos7840_port->open) {
1418 dev_dbg(&port->dev, "%s", "port not opened\n");
1419 return;
1420 }
1421
1422 /* if we are implementing XON/XOFF, send the stop character */
1423 if (I_IXOFF(tty)) {
1424 unsigned char stop_char = STOP_CHAR(tty);
1425 status = mos7840_write(tty, port, &stop_char, 1);
1426 if (status <= 0)
1427 return;
1428 }
1429 /* if we are implementing RTS/CTS, toggle that line */
1430 if (C_CRTSCTS(tty)) {
1431 mos7840_port->shadowMCR &= ~MCR_RTS;
1432 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1433 mos7840_port->shadowMCR);
1434 if (status < 0)
1435 return;
1436 }
1437 }
1438
1439 /*****************************************************************************
1440 * mos7840_unthrottle
1441 * this function is called by the tty driver when it wants to resume
1442 * the data being read from the port (called after mos7840_throttle is
1443 * called)
1444 *****************************************************************************/
1445 static void mos7840_unthrottle(struct tty_struct *tty)
1446 {
1447 struct usb_serial_port *port = tty->driver_data;
1448 int status;
1449 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1450
1451 if (mos7840_port_paranoia_check(port, __func__))
1452 return;
1453
1454 if (mos7840_port == NULL)
1455 return;
1456
1457 if (!mos7840_port->open) {
1458 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1459 return;
1460 }
1461
1462 /* if we are implementing XON/XOFF, send the start character */
1463 if (I_IXOFF(tty)) {
1464 unsigned char start_char = START_CHAR(tty);
1465 status = mos7840_write(tty, port, &start_char, 1);
1466 if (status <= 0)
1467 return;
1468 }
1469
1470 /* if we are implementing RTS/CTS, toggle that line */
1471 if (C_CRTSCTS(tty)) {
1472 mos7840_port->shadowMCR |= MCR_RTS;
1473 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1474 mos7840_port->shadowMCR);
1475 if (status < 0)
1476 return;
1477 }
1478 }
1479
1480 static int mos7840_tiocmget(struct tty_struct *tty)
1481 {
1482 struct usb_serial_port *port = tty->driver_data;
1483 struct moschip_port *mos7840_port;
1484 unsigned int result;
1485 __u16 msr;
1486 __u16 mcr;
1487 int status;
1488 mos7840_port = mos7840_get_port_private(port);
1489
1490 if (mos7840_port == NULL)
1491 return -ENODEV;
1492
1493 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1494 if (status < 0)
1495 return -EIO;
1496 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1497 if (status < 0)
1498 return -EIO;
1499 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1500 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1501 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1502 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1503 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1504 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1505 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1506
1507 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1508
1509 return result;
1510 }
1511
1512 static int mos7840_tiocmset(struct tty_struct *tty,
1513 unsigned int set, unsigned int clear)
1514 {
1515 struct usb_serial_port *port = tty->driver_data;
1516 struct moschip_port *mos7840_port;
1517 unsigned int mcr;
1518 int status;
1519
1520 mos7840_port = mos7840_get_port_private(port);
1521
1522 if (mos7840_port == NULL)
1523 return -ENODEV;
1524
1525 /* FIXME: What locks the port registers ? */
1526 mcr = mos7840_port->shadowMCR;
1527 if (clear & TIOCM_RTS)
1528 mcr &= ~MCR_RTS;
1529 if (clear & TIOCM_DTR)
1530 mcr &= ~MCR_DTR;
1531 if (clear & TIOCM_LOOP)
1532 mcr &= ~MCR_LOOPBACK;
1533
1534 if (set & TIOCM_RTS)
1535 mcr |= MCR_RTS;
1536 if (set & TIOCM_DTR)
1537 mcr |= MCR_DTR;
1538 if (set & TIOCM_LOOP)
1539 mcr |= MCR_LOOPBACK;
1540
1541 mos7840_port->shadowMCR = mcr;
1542
1543 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1544 if (status < 0) {
1545 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1546 return status;
1547 }
1548
1549 return 0;
1550 }
1551
1552 /*****************************************************************************
1553 * mos7840_calc_baud_rate_divisor
1554 * this function calculates the proper baud rate divisor for the specified
1555 * baud rate.
1556 *****************************************************************************/
1557 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1558 int baudRate, int *divisor,
1559 __u16 *clk_sel_val)
1560 {
1561 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1562
1563 if (baudRate <= 115200) {
1564 *divisor = 115200 / baudRate;
1565 *clk_sel_val = 0x0;
1566 }
1567 if ((baudRate > 115200) && (baudRate <= 230400)) {
1568 *divisor = 230400 / baudRate;
1569 *clk_sel_val = 0x10;
1570 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1571 *divisor = 403200 / baudRate;
1572 *clk_sel_val = 0x20;
1573 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1574 *divisor = 460800 / baudRate;
1575 *clk_sel_val = 0x30;
1576 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1577 *divisor = 806400 / baudRate;
1578 *clk_sel_val = 0x40;
1579 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1580 *divisor = 921600 / baudRate;
1581 *clk_sel_val = 0x50;
1582 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1583 *divisor = 1572864 / baudRate;
1584 *clk_sel_val = 0x60;
1585 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1586 *divisor = 3145728 / baudRate;
1587 *clk_sel_val = 0x70;
1588 }
1589 return 0;
1590 }
1591
1592 /*****************************************************************************
1593 * mos7840_send_cmd_write_baud_rate
1594 * this function sends the proper command to change the baud rate of the
1595 * specified port.
1596 *****************************************************************************/
1597
1598 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1599 int baudRate)
1600 {
1601 int divisor = 0;
1602 int status;
1603 __u16 Data;
1604 unsigned char number;
1605 __u16 clk_sel_val;
1606 struct usb_serial_port *port;
1607
1608 if (mos7840_port == NULL)
1609 return -1;
1610
1611 port = mos7840_port->port;
1612 if (mos7840_port_paranoia_check(port, __func__))
1613 return -1;
1614
1615 if (mos7840_serial_paranoia_check(port->serial, __func__))
1616 return -1;
1617
1618 number = mos7840_port->port->port_number;
1619
1620 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1621 /* reset clk_uart_sel in spregOffset */
1622 if (baudRate > 115200) {
1623 #ifdef HW_flow_control
1624 /* NOTE: need to see the pther register to modify */
1625 /* setting h/w flow control bit to 1 */
1626 Data = 0x2b;
1627 mos7840_port->shadowMCR = Data;
1628 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1629 Data);
1630 if (status < 0) {
1631 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1632 return -1;
1633 }
1634 #endif
1635
1636 } else {
1637 #ifdef HW_flow_control
1638 /* setting h/w flow control bit to 0 */
1639 Data = 0xb;
1640 mos7840_port->shadowMCR = Data;
1641 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1642 Data);
1643 if (status < 0) {
1644 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1645 return -1;
1646 }
1647 #endif
1648
1649 }
1650
1651 if (1) { /* baudRate <= 115200) */
1652 clk_sel_val = 0x0;
1653 Data = 0x0;
1654 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1655 &clk_sel_val);
1656 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1657 &Data);
1658 if (status < 0) {
1659 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1660 return -1;
1661 }
1662 Data = (Data & 0x8f) | clk_sel_val;
1663 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1664 Data);
1665 if (status < 0) {
1666 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1667 return -1;
1668 }
1669 /* Calculate the Divisor */
1670
1671 if (status) {
1672 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1673 return status;
1674 }
1675 /* Enable access to divisor latch */
1676 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1677 mos7840_port->shadowLCR = Data;
1678 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1679
1680 /* Write the divisor */
1681 Data = (unsigned char)(divisor & 0xff);
1682 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1683 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1684
1685 Data = (unsigned char)((divisor & 0xff00) >> 8);
1686 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1687 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1688
1689 /* Disable access to divisor latch */
1690 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1691 mos7840_port->shadowLCR = Data;
1692 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1693
1694 }
1695 return status;
1696 }
1697
1698 /*****************************************************************************
1699 * mos7840_change_port_settings
1700 * This routine is called to set the UART on the device to match
1701 * the specified new settings.
1702 *****************************************************************************/
1703
1704 static void mos7840_change_port_settings(struct tty_struct *tty,
1705 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1706 {
1707 int baud;
1708 unsigned cflag;
1709 unsigned iflag;
1710 __u8 lData;
1711 __u8 lParity;
1712 __u8 lStop;
1713 int status;
1714 __u16 Data;
1715 struct usb_serial_port *port;
1716 struct usb_serial *serial;
1717
1718 if (mos7840_port == NULL)
1719 return;
1720
1721 port = mos7840_port->port;
1722
1723 if (mos7840_port_paranoia_check(port, __func__))
1724 return;
1725
1726 if (mos7840_serial_paranoia_check(port->serial, __func__))
1727 return;
1728
1729 serial = port->serial;
1730
1731 if (!mos7840_port->open) {
1732 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1733 return;
1734 }
1735
1736 lData = LCR_BITS_8;
1737 lStop = LCR_STOP_1;
1738 lParity = LCR_PAR_NONE;
1739
1740 cflag = tty->termios.c_cflag;
1741 iflag = tty->termios.c_iflag;
1742
1743 /* Change the number of bits */
1744 switch (cflag & CSIZE) {
1745 case CS5:
1746 lData = LCR_BITS_5;
1747 break;
1748
1749 case CS6:
1750 lData = LCR_BITS_6;
1751 break;
1752
1753 case CS7:
1754 lData = LCR_BITS_7;
1755 break;
1756
1757 default:
1758 case CS8:
1759 lData = LCR_BITS_8;
1760 break;
1761 }
1762
1763 /* Change the Parity bit */
1764 if (cflag & PARENB) {
1765 if (cflag & PARODD) {
1766 lParity = LCR_PAR_ODD;
1767 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1768 } else {
1769 lParity = LCR_PAR_EVEN;
1770 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1771 }
1772
1773 } else {
1774 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1775 }
1776
1777 if (cflag & CMSPAR)
1778 lParity = lParity | 0x20;
1779
1780 /* Change the Stop bit */
1781 if (cflag & CSTOPB) {
1782 lStop = LCR_STOP_2;
1783 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1784 } else {
1785 lStop = LCR_STOP_1;
1786 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1787 }
1788
1789 /* Update the LCR with the correct value */
1790 mos7840_port->shadowLCR &=
1791 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1792 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1793
1794 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1795 mos7840_port->shadowLCR);
1796 /* Disable Interrupts */
1797 Data = 0x00;
1798 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1799
1800 Data = 0x00;
1801 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1802
1803 Data = 0xcf;
1804 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1805
1806 /* Send the updated LCR value to the mos7840 */
1807 Data = mos7840_port->shadowLCR;
1808
1809 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1810
1811 Data = 0x00b;
1812 mos7840_port->shadowMCR = Data;
1813 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1814 Data = 0x00b;
1815 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1816
1817 /* set up the MCR register and send it to the mos7840 */
1818
1819 mos7840_port->shadowMCR = MCR_MASTER_IE;
1820 if (cflag & CBAUD)
1821 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1822
1823 if (cflag & CRTSCTS)
1824 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1825 else
1826 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1827
1828 Data = mos7840_port->shadowMCR;
1829 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1830
1831 /* Determine divisor based on baud rate */
1832 baud = tty_get_baud_rate(tty);
1833
1834 if (!baud) {
1835 /* pick a default, any default... */
1836 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1837 baud = 9600;
1838 }
1839
1840 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1841 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1842
1843 /* Enable Interrupts */
1844 Data = 0x0c;
1845 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1846
1847 if (!mos7840_port->read_urb_busy) {
1848 mos7840_port->read_urb_busy = true;
1849 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1850 if (status) {
1851 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1852 status);
1853 mos7840_port->read_urb_busy = false;
1854 }
1855 }
1856 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1857 mos7840_port->shadowLCR);
1858 }
1859
1860 /*****************************************************************************
1861 * mos7840_set_termios
1862 * this function is called by the tty driver when it wants to change
1863 * the termios structure
1864 *****************************************************************************/
1865
1866 static void mos7840_set_termios(struct tty_struct *tty,
1867 struct usb_serial_port *port,
1868 struct ktermios *old_termios)
1869 {
1870 int status;
1871 unsigned int cflag;
1872 struct usb_serial *serial;
1873 struct moschip_port *mos7840_port;
1874
1875 if (mos7840_port_paranoia_check(port, __func__))
1876 return;
1877
1878 serial = port->serial;
1879
1880 if (mos7840_serial_paranoia_check(serial, __func__))
1881 return;
1882
1883 mos7840_port = mos7840_get_port_private(port);
1884
1885 if (mos7840_port == NULL)
1886 return;
1887
1888 if (!mos7840_port->open) {
1889 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1890 return;
1891 }
1892
1893 dev_dbg(&port->dev, "%s", "setting termios - \n");
1894
1895 cflag = tty->termios.c_cflag;
1896
1897 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
1898 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
1899 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
1900 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
1901
1902 /* change the port settings to the new ones specified */
1903
1904 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1905
1906 if (!mos7840_port->read_urb) {
1907 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
1908 return;
1909 }
1910
1911 if (!mos7840_port->read_urb_busy) {
1912 mos7840_port->read_urb_busy = true;
1913 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1914 if (status) {
1915 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1916 status);
1917 mos7840_port->read_urb_busy = false;
1918 }
1919 }
1920 }
1921
1922 /*****************************************************************************
1923 * mos7840_get_lsr_info - get line status register info
1924 *
1925 * Purpose: Let user call ioctl() to get info when the UART physically
1926 * is emptied. On bus types like RS485, the transmitter must
1927 * release the bus after transmitting. This must be done when
1928 * the transmit shift register is empty, not be done when the
1929 * transmit holding register is empty. This functionality
1930 * allows an RS485 driver to be written in user space.
1931 *****************************************************************************/
1932
1933 static int mos7840_get_lsr_info(struct tty_struct *tty,
1934 unsigned int __user *value)
1935 {
1936 int count;
1937 unsigned int result = 0;
1938
1939 count = mos7840_chars_in_buffer(tty);
1940 if (count == 0)
1941 result = TIOCSER_TEMT;
1942
1943 if (copy_to_user(value, &result, sizeof(int)))
1944 return -EFAULT;
1945 return 0;
1946 }
1947
1948 /*****************************************************************************
1949 * mos7840_get_serial_info
1950 * function to get information about serial port
1951 *****************************************************************************/
1952
1953 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
1954 struct serial_struct __user *retinfo)
1955 {
1956 struct serial_struct tmp;
1957
1958 if (mos7840_port == NULL)
1959 return -1;
1960
1961 memset(&tmp, 0, sizeof(tmp));
1962
1963 tmp.type = PORT_16550A;
1964 tmp.line = mos7840_port->port->minor;
1965 tmp.port = mos7840_port->port->port_number;
1966 tmp.irq = 0;
1967 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1968 tmp.baud_base = 9600;
1969 tmp.close_delay = 5 * HZ;
1970 tmp.closing_wait = 30 * HZ;
1971
1972 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1973 return -EFAULT;
1974 return 0;
1975 }
1976
1977 /*****************************************************************************
1978 * SerialIoctl
1979 * this function handles any ioctl calls to the driver
1980 *****************************************************************************/
1981
1982 static int mos7840_ioctl(struct tty_struct *tty,
1983 unsigned int cmd, unsigned long arg)
1984 {
1985 struct usb_serial_port *port = tty->driver_data;
1986 void __user *argp = (void __user *)arg;
1987 struct moschip_port *mos7840_port;
1988
1989 if (mos7840_port_paranoia_check(port, __func__))
1990 return -1;
1991
1992 mos7840_port = mos7840_get_port_private(port);
1993
1994 if (mos7840_port == NULL)
1995 return -1;
1996
1997 switch (cmd) {
1998 /* return number of bytes available */
1999
2000 case TIOCSERGETLSR:
2001 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2002 return mos7840_get_lsr_info(tty, argp);
2003
2004 case TIOCGSERIAL:
2005 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2006 return mos7840_get_serial_info(mos7840_port, argp);
2007
2008 case TIOCSSERIAL:
2009 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2010 break;
2011 default:
2012 break;
2013 }
2014 return -ENOIOCTLCMD;
2015 }
2016
2017 static int mos7810_check(struct usb_serial *serial)
2018 {
2019 int i, pass_count = 0;
2020 u8 *buf;
2021 __u16 data = 0, mcr_data = 0;
2022 __u16 test_pattern = 0x55AA;
2023 int res;
2024
2025 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2026 if (!buf)
2027 return 0; /* failed to identify 7810 */
2028
2029 /* Store MCR setting */
2030 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2031 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2032 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2033 if (res == VENDOR_READ_LENGTH)
2034 mcr_data = *buf;
2035
2036 for (i = 0; i < 16; i++) {
2037 /* Send the 1-bit test pattern out to MCS7810 test pin */
2038 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2039 MCS_WRREQ, MCS_WR_RTYPE,
2040 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2041 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2042
2043 /* Read the test pattern back */
2044 res = usb_control_msg(serial->dev,
2045 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2046 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2047 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2048 if (res == VENDOR_READ_LENGTH)
2049 data = *buf;
2050
2051 /* If this is a MCS7810 device, both test patterns must match */
2052 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2053 break;
2054
2055 pass_count++;
2056 }
2057
2058 /* Restore MCR setting */
2059 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2060 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2061 0, MOS_WDR_TIMEOUT);
2062
2063 kfree(buf);
2064
2065 if (pass_count == 16)
2066 return 1;
2067
2068 return 0;
2069 }
2070
2071 static int mos7840_probe(struct usb_serial *serial,
2072 const struct usb_device_id *id)
2073 {
2074 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
2075 u8 *buf;
2076 int device_type;
2077
2078 if (product == MOSCHIP_DEVICE_ID_7810 ||
2079 product == MOSCHIP_DEVICE_ID_7820) {
2080 device_type = product;
2081 goto out;
2082 }
2083
2084 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2085 if (!buf)
2086 return -ENOMEM;
2087
2088 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2089 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2090 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2091
2092 /* For a MCS7840 device GPIO0 must be set to 1 */
2093 if (buf[0] & 0x01)
2094 device_type = MOSCHIP_DEVICE_ID_7840;
2095 else if (mos7810_check(serial))
2096 device_type = MOSCHIP_DEVICE_ID_7810;
2097 else
2098 device_type = MOSCHIP_DEVICE_ID_7820;
2099
2100 kfree(buf);
2101 out:
2102 usb_set_serial_data(serial, (void *)(unsigned long)device_type);
2103
2104 return 0;
2105 }
2106
2107 static int mos7840_calc_num_ports(struct usb_serial *serial)
2108 {
2109 int device_type = (unsigned long)usb_get_serial_data(serial);
2110 int mos7840_num_ports;
2111
2112 mos7840_num_ports = (device_type >> 4) & 0x000F;
2113
2114 return mos7840_num_ports;
2115 }
2116
2117 static int mos7840_attach(struct usb_serial *serial)
2118 {
2119 if (serial->num_bulk_in < serial->num_ports ||
2120 serial->num_bulk_out < serial->num_ports ||
2121 serial->num_interrupt_in < 1) {
2122 dev_err(&serial->interface->dev, "missing endpoints\n");
2123 return -ENODEV;
2124 }
2125
2126 return 0;
2127 }
2128
2129 static int mos7840_port_probe(struct usb_serial_port *port)
2130 {
2131 struct usb_serial *serial = port->serial;
2132 int device_type = (unsigned long)usb_get_serial_data(serial);
2133 struct moschip_port *mos7840_port;
2134 int status;
2135 int pnum;
2136 __u16 Data;
2137
2138 /* we set up the pointers to the endpoints in the mos7840_open *
2139 * function, as the structures aren't created yet. */
2140
2141 pnum = port->port_number;
2142
2143 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2144 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2145 if (!mos7840_port)
2146 return -ENOMEM;
2147
2148 /* Initialize all port interrupt end point to port 0 int
2149 * endpoint. Our device has only one interrupt end point
2150 * common to all port */
2151
2152 mos7840_port->port = port;
2153 mos7840_set_port_private(port, mos7840_port);
2154 spin_lock_init(&mos7840_port->pool_lock);
2155
2156 /* minor is not initialised until later by
2157 * usb-serial.c:get_free_serial() and cannot therefore be used
2158 * to index device instances */
2159 mos7840_port->port_num = pnum + 1;
2160 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
2161 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2162
2163 if (mos7840_port->port_num == 1) {
2164 mos7840_port->SpRegOffset = 0x0;
2165 mos7840_port->ControlRegOffset = 0x1;
2166 mos7840_port->DcrRegOffset = 0x4;
2167 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2168 mos7840_port->SpRegOffset = 0x8;
2169 mos7840_port->ControlRegOffset = 0x9;
2170 mos7840_port->DcrRegOffset = 0x16;
2171 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2172 mos7840_port->SpRegOffset = 0xa;
2173 mos7840_port->ControlRegOffset = 0xb;
2174 mos7840_port->DcrRegOffset = 0x19;
2175 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2176 mos7840_port->SpRegOffset = 0xa;
2177 mos7840_port->ControlRegOffset = 0xb;
2178 mos7840_port->DcrRegOffset = 0x19;
2179 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2180 mos7840_port->SpRegOffset = 0xc;
2181 mos7840_port->ControlRegOffset = 0xd;
2182 mos7840_port->DcrRegOffset = 0x1c;
2183 }
2184 mos7840_dump_serial_port(port, mos7840_port);
2185 mos7840_set_port_private(port, mos7840_port);
2186
2187 /* enable rx_disable bit in control register */
2188 status = mos7840_get_reg_sync(port,
2189 mos7840_port->ControlRegOffset, &Data);
2190 if (status < 0) {
2191 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2192 goto out;
2193 } else
2194 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2195 Data |= 0x08; /* setting driver done bit */
2196 Data |= 0x04; /* sp1_bit to have cts change reflect in
2197 modem status reg */
2198
2199 /* Data |= 0x20; //rx_disable bit */
2200 status = mos7840_set_reg_sync(port,
2201 mos7840_port->ControlRegOffset, Data);
2202 if (status < 0) {
2203 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2204 goto out;
2205 } else
2206 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2207
2208 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2209 and 0x24 in DCR3 */
2210 Data = 0x01;
2211 status = mos7840_set_reg_sync(port,
2212 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2213 if (status < 0) {
2214 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2215 goto out;
2216 } else
2217 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2218
2219 Data = 0x05;
2220 status = mos7840_set_reg_sync(port,
2221 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2222 if (status < 0) {
2223 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2224 goto out;
2225 } else
2226 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2227
2228 Data = 0x24;
2229 status = mos7840_set_reg_sync(port,
2230 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2231 if (status < 0) {
2232 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2233 goto out;
2234 } else
2235 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2236
2237 /* write values in clkstart0x0 and clkmulti 0x20 */
2238 Data = 0x0;
2239 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2240 if (status < 0) {
2241 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2242 goto out;
2243 } else
2244 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2245
2246 Data = 0x20;
2247 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2248 if (status < 0) {
2249 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2250 goto error;
2251 } else
2252 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2253
2254 /* write value 0x0 to scratchpad register */
2255 Data = 0x00;
2256 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2257 if (status < 0) {
2258 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2259 goto out;
2260 } else
2261 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2262
2263 /* Zero Length flag register */
2264 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2265 Data = 0xff;
2266 status = mos7840_set_reg_sync(port,
2267 (__u16) (ZLP_REG1 +
2268 ((__u16)mos7840_port->port_num)), Data);
2269 dev_dbg(&port->dev, "ZLIP offset %x\n",
2270 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2271 if (status < 0) {
2272 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2273 goto out;
2274 } else
2275 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2276 } else {
2277 Data = 0xff;
2278 status = mos7840_set_reg_sync(port,
2279 (__u16) (ZLP_REG1 +
2280 ((__u16)mos7840_port->port_num) - 0x1), Data);
2281 dev_dbg(&port->dev, "ZLIP offset %x\n",
2282 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2283 if (status < 0) {
2284 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2285 goto out;
2286 } else
2287 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2288
2289 }
2290 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2291 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2292 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2293 GFP_KERNEL);
2294 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2295 !mos7840_port->dr) {
2296 status = -ENOMEM;
2297 goto error;
2298 }
2299
2300 mos7840_port->has_led = false;
2301
2302 /* Initialize LED timers */
2303 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2304 mos7840_port->has_led = true;
2305
2306 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2307 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2308 GFP_KERNEL);
2309 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2310 status = -ENOMEM;
2311 goto error;
2312 }
2313
2314 setup_timer(&mos7840_port->led_timer1, mos7840_led_off,
2315 (unsigned long)mos7840_port);
2316 mos7840_port->led_timer1.expires =
2317 jiffies + msecs_to_jiffies(LED_ON_MS);
2318 setup_timer(&mos7840_port->led_timer2, mos7840_led_flag_off,
2319 (unsigned long)mos7840_port);
2320 mos7840_port->led_timer2.expires =
2321 jiffies + msecs_to_jiffies(LED_OFF_MS);
2322
2323 /* Turn off LED */
2324 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2325 }
2326 out:
2327 if (pnum == serial->num_ports - 1) {
2328 /* Zero Length flag enable */
2329 Data = 0x0f;
2330 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2331 if (status < 0) {
2332 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2333 goto error;
2334 } else
2335 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2336
2337 /* setting configuration feature to one */
2338 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2339 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2340 MOS_WDR_TIMEOUT);
2341 }
2342 return 0;
2343 error:
2344 kfree(mos7840_port->led_dr);
2345 usb_free_urb(mos7840_port->led_urb);
2346 kfree(mos7840_port->dr);
2347 kfree(mos7840_port->ctrl_buf);
2348 usb_free_urb(mos7840_port->control_urb);
2349 kfree(mos7840_port);
2350
2351 return status;
2352 }
2353
2354 static int mos7840_port_remove(struct usb_serial_port *port)
2355 {
2356 struct moschip_port *mos7840_port;
2357
2358 mos7840_port = mos7840_get_port_private(port);
2359
2360 if (mos7840_port->has_led) {
2361 /* Turn off LED */
2362 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2363
2364 del_timer_sync(&mos7840_port->led_timer1);
2365 del_timer_sync(&mos7840_port->led_timer2);
2366
2367 usb_kill_urb(mos7840_port->led_urb);
2368 usb_free_urb(mos7840_port->led_urb);
2369 kfree(mos7840_port->led_dr);
2370 }
2371 usb_kill_urb(mos7840_port->control_urb);
2372 usb_free_urb(mos7840_port->control_urb);
2373 kfree(mos7840_port->ctrl_buf);
2374 kfree(mos7840_port->dr);
2375 kfree(mos7840_port);
2376
2377 return 0;
2378 }
2379
2380 static struct usb_serial_driver moschip7840_4port_device = {
2381 .driver = {
2382 .owner = THIS_MODULE,
2383 .name = "mos7840",
2384 },
2385 .description = DRIVER_DESC,
2386 .id_table = id_table,
2387 .num_ports = 4,
2388 .open = mos7840_open,
2389 .close = mos7840_close,
2390 .write = mos7840_write,
2391 .write_room = mos7840_write_room,
2392 .chars_in_buffer = mos7840_chars_in_buffer,
2393 .throttle = mos7840_throttle,
2394 .unthrottle = mos7840_unthrottle,
2395 .calc_num_ports = mos7840_calc_num_ports,
2396 .probe = mos7840_probe,
2397 .ioctl = mos7840_ioctl,
2398 .set_termios = mos7840_set_termios,
2399 .break_ctl = mos7840_break,
2400 .tiocmget = mos7840_tiocmget,
2401 .tiocmset = mos7840_tiocmset,
2402 .tiocmiwait = usb_serial_generic_tiocmiwait,
2403 .get_icount = usb_serial_generic_get_icount,
2404 .attach = mos7840_attach,
2405 .port_probe = mos7840_port_probe,
2406 .port_remove = mos7840_port_remove,
2407 .read_bulk_callback = mos7840_bulk_in_callback,
2408 .read_int_callback = mos7840_interrupt_callback,
2409 };
2410
2411 static struct usb_serial_driver * const serial_drivers[] = {
2412 &moschip7840_4port_device, NULL
2413 };
2414
2415 module_usb_serial_driver(serial_drivers, id_table);
2416
2417 MODULE_DESCRIPTION(DRIVER_DESC);
2418 MODULE_LICENSE("GPL");
Linux with added FPC-III support