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Merge tag 'trace-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[linux/fpc-iii.git] / drivers / usb / serial / mos7840.c
blob23f91d658cb46db99e5fd5e51065c8ffad11f9d0
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Clean ups from Moschip version and a few ioctl implementations by:
4 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
5 *
6 * Originally based on drivers/usb/serial/io_edgeport.c which is:
7 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
8 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
9 *
10 */
11
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/slab.h>
15 #include <linux/tty.h>
16 #include <linux/tty_driver.h>
17 #include <linux/tty_flip.h>
18 #include <linux/module.h>
19 #include <linux/serial.h>
20 #include <linux/usb.h>
21 #include <linux/usb/serial.h>
22 #include <linux/uaccess.h>
23
24 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
25
26 /*
27 * 16C50 UART register defines
28 */
29
30 #define LCR_BITS_5 0x00 /* 5 bits/char */
31 #define LCR_BITS_6 0x01 /* 6 bits/char */
32 #define LCR_BITS_7 0x02 /* 7 bits/char */
33 #define LCR_BITS_8 0x03 /* 8 bits/char */
34 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
35
36 #define LCR_STOP_1 0x00 /* 1 stop bit */
37 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
38 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
39 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
40
41 #define LCR_PAR_NONE 0x00 /* No parity */
42 #define LCR_PAR_ODD 0x08 /* Odd parity */
43 #define LCR_PAR_EVEN 0x18 /* Even parity */
44 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
45 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
46 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
47
48 #define LCR_SET_BREAK 0x40 /* Set Break condition */
49 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
50
51 #define MCR_DTR 0x01 /* Assert DTR */
52 #define MCR_RTS 0x02 /* Assert RTS */
53 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
54 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
55 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
56 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
57
58 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
59 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
60 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
61 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
62
63 /*
64 * Defines used for sending commands to port
65 */
66
67 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
68
69 #define MOS_PORT1 0x0200
70 #define MOS_PORT2 0x0300
71 #define MOS_VENREG 0x0000
72 #define MOS_MAX_PORT 0x02
73 #define MOS_WRITE 0x0E
74 #define MOS_READ 0x0D
75
76 /* Requests */
77 #define MCS_RD_RTYPE 0xC0
78 #define MCS_WR_RTYPE 0x40
79 #define MCS_RDREQ 0x0D
80 #define MCS_WRREQ 0x0E
81 #define MCS_CTRL_TIMEOUT 500
82 #define VENDOR_READ_LENGTH (0x01)
83
84 #define MAX_NAME_LEN 64
85
86 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
87 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
88
89 /* For higher baud Rates use TIOCEXBAUD */
90 #define TIOCEXBAUD 0x5462
91
92 /*
93 * Vendor id and device id defines
94 *
95 * NOTE: Do not add new defines, add entries directly to the id_table instead.
96 */
97 #define USB_VENDOR_ID_BANDB 0x0856
98 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
99 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
100 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
101 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
102 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
103 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
104 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
105 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
106 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
107 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
108 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
109 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
110 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
111
112 /* Interrupt Routine Defines */
113
114 #define SERIAL_IIR_RLS 0x06
115 #define SERIAL_IIR_MS 0x00
116
117 /*
118 * Emulation of the bit mask on the LINE STATUS REGISTER.
119 */
120 #define SERIAL_LSR_DR 0x0001
121 #define SERIAL_LSR_OE 0x0002
122 #define SERIAL_LSR_PE 0x0004
123 #define SERIAL_LSR_FE 0x0008
124 #define SERIAL_LSR_BI 0x0010
125
126 #define MOS_MSR_DELTA_CTS 0x10
127 #define MOS_MSR_DELTA_DSR 0x20
128 #define MOS_MSR_DELTA_RI 0x40
129 #define MOS_MSR_DELTA_CD 0x80
130
131 /* Serial Port register Address */
132 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
133 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
134 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
135 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
136 #define LINE_STATUS_REGISTER ((__u16)(0x05))
137 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
138 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
139 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
140 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
141
142 #define CLK_MULTI_REGISTER ((__u16)(0x02))
143 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
144 #define GPIO_REGISTER ((__u16)(0x07))
145
146 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
147
148 /*
149 * URB POOL related defines
150 */
151 #define NUM_URBS 16 /* URB Count */
152 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
153
154 /* LED on/off milliseconds*/
155 #define LED_ON_MS 500
156 #define LED_OFF_MS 500
157
158 enum mos7840_flag {
159 MOS7840_FLAG_LED_BUSY,
160 };
161
162 #define MCS_PORT_MASK GENMASK(2, 0)
163 #define MCS_PORTS(nr) ((nr) & MCS_PORT_MASK)
164 #define MCS_LED BIT(3)
165
166 #define MCS_DEVICE(vid, pid, flags) \
167 USB_DEVICE((vid), (pid)), .driver_info = (flags)
168
169 static const struct usb_device_id id_table[] = {
170 { MCS_DEVICE(0x0557, 0x2011, MCS_PORTS(4)) }, /* ATEN UC2324 */
171 { MCS_DEVICE(0x0557, 0x7820, MCS_PORTS(2)) }, /* ATEN UC2322 */
172 { MCS_DEVICE(0x110a, 0x2210, MCS_PORTS(2)) }, /* Moxa UPort 2210 */
173 { MCS_DEVICE(0x9710, 0x7810, MCS_PORTS(1) | MCS_LED) }, /* ASIX MCS7810 */
174 { MCS_DEVICE(0x9710, 0x7820, MCS_PORTS(2)) }, /* MosChip MCS7820 */
175 { MCS_DEVICE(0x9710, 0x7840, MCS_PORTS(4)) }, /* MosChip MCS7840 */
176 { MCS_DEVICE(0x9710, 0x7843, MCS_PORTS(3)) }, /* ASIX MCS7840 3 port */
177 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2) },
178 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P) },
179 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4) },
180 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P) },
181 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2) },
182 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4) },
183 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2) },
184 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4) },
185 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2) },
186 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P) },
187 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4) },
188 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P) },
189 { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4) },
190 {} /* terminating entry */
191 };
192 MODULE_DEVICE_TABLE(usb, id_table);
193
194 /* This structure holds all of the local port information */
195
196 struct moschip_port {
197 int port_num; /*Actual port number in the device(1,2,etc) */
198 struct urb *read_urb; /* read URB for this port */
199 __u8 shadowLCR; /* last LCR value received */
200 __u8 shadowMCR; /* last MCR value received */
201 struct usb_serial_port *port; /* loop back to the owner of this object */
202
203 /* Offsets */
204 __u8 SpRegOffset;
205 __u8 ControlRegOffset;
206 __u8 DcrRegOffset;
207
208 spinlock_t pool_lock;
209 struct urb *write_urb_pool[NUM_URBS];
210 char busy[NUM_URBS];
211 bool read_urb_busy;
212
213 /* For device(s) with LED indicator */
214 bool has_led;
215 struct timer_list led_timer1; /* Timer for LED on */
216 struct timer_list led_timer2; /* Timer for LED off */
217 struct urb *led_urb;
218 struct usb_ctrlrequest *led_dr;
219
220 unsigned long flags;
221 };
222
223 /*
224 * mos7840_set_reg_sync
225 * To set the Control register by calling usb_fill_control_urb function
226 * by passing usb_sndctrlpipe function as parameter.
227 */
228
229 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
230 __u16 val)
231 {
232 struct usb_device *dev = port->serial->dev;
233 val = val & 0x00ff;
234 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
235
236 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
237 MCS_WR_RTYPE, val, reg, NULL, 0,
238 MOS_WDR_TIMEOUT);
239 }
240
241 /*
242 * mos7840_get_reg_sync
243 * To set the Uart register by calling usb_fill_control_urb function by
244 * passing usb_rcvctrlpipe function as parameter.
245 */
246
247 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
248 __u16 *val)
249 {
250 struct usb_device *dev = port->serial->dev;
251 int ret = 0;
252 u8 *buf;
253
254 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
255 if (!buf)
256 return -ENOMEM;
257
258 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
259 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
260 MOS_WDR_TIMEOUT);
261 if (ret < VENDOR_READ_LENGTH) {
262 if (ret >= 0)
263 ret = -EIO;
264 goto out;
265 }
266
267 *val = buf[0];
268 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
269 out:
270 kfree(buf);
271 return ret;
272 }
273
274 /*
275 * mos7840_set_uart_reg
276 * To set the Uart register by calling usb_fill_control_urb function by
277 * passing usb_sndctrlpipe function as parameter.
278 */
279
280 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
281 __u16 val)
282 {
283
284 struct usb_device *dev = port->serial->dev;
285 val = val & 0x00ff;
286 /* For the UART control registers, the application number need
287 to be Or'ed */
288 if (port->serial->num_ports == 2 && port->port_number != 0)
289 val |= ((__u16)port->port_number + 2) << 8;
290 else
291 val |= ((__u16)port->port_number + 1) << 8;
292 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
293 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
294 MCS_WR_RTYPE, val, reg, NULL, 0,
295 MOS_WDR_TIMEOUT);
296
297 }
298
299 /*
300 * mos7840_get_uart_reg
301 * To set the Control register by calling usb_fill_control_urb function
302 * by passing usb_rcvctrlpipe function as parameter.
303 */
304 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
305 __u16 *val)
306 {
307 struct usb_device *dev = port->serial->dev;
308 int ret = 0;
309 __u16 Wval;
310 u8 *buf;
311
312 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
313 if (!buf)
314 return -ENOMEM;
315
316 /* Wval is same as application number */
317 if (port->serial->num_ports == 2 && port->port_number != 0)
318 Wval = ((__u16)port->port_number + 2) << 8;
319 else
320 Wval = ((__u16)port->port_number + 1) << 8;
321 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
322 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
323 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
324 MOS_WDR_TIMEOUT);
325 if (ret < VENDOR_READ_LENGTH) {
326 if (ret >= 0)
327 ret = -EIO;
328 goto out;
329 }
330 *val = buf[0];
331 out:
332 kfree(buf);
333 return ret;
334 }
335
336 static void mos7840_dump_serial_port(struct usb_serial_port *port,
337 struct moschip_port *mos7840_port)
338 {
339
340 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
341 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
342 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
343
344 }
345
346 /************************************************************************/
347 /************************************************************************/
348 /* U S B C A L L B A C K F U N C T I O N S */
349 /* U S B C A L L B A C K F U N C T I O N S */
350 /************************************************************************/
351 /************************************************************************/
352
353 static void mos7840_set_led_callback(struct urb *urb)
354 {
355 switch (urb->status) {
356 case 0:
357 /* Success */
358 break;
359 case -ECONNRESET:
360 case -ENOENT:
361 case -ESHUTDOWN:
362 /* This urb is terminated, clean up */
363 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n",
364 __func__, urb->status);
365 break;
366 default:
367 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n",
368 __func__, urb->status);
369 }
370 }
371
372 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
373 __u16 reg)
374 {
375 struct usb_device *dev = mcs->port->serial->dev;
376 struct usb_ctrlrequest *dr = mcs->led_dr;
377
378 dr->bRequestType = MCS_WR_RTYPE;
379 dr->bRequest = MCS_WRREQ;
380 dr->wValue = cpu_to_le16(wval);
381 dr->wIndex = cpu_to_le16(reg);
382 dr->wLength = cpu_to_le16(0);
383
384 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
385 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
386
387 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
388 }
389
390 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
391 __u16 val)
392 {
393 struct usb_device *dev = port->serial->dev;
394
395 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
396 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
397 }
398
399 static void mos7840_led_off(struct timer_list *t)
400 {
401 struct moschip_port *mcs = from_timer(mcs, t, led_timer1);
402
403 /* Turn off LED */
404 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
405 mod_timer(&mcs->led_timer2,
406 jiffies + msecs_to_jiffies(LED_OFF_MS));
407 }
408
409 static void mos7840_led_flag_off(struct timer_list *t)
410 {
411 struct moschip_port *mcs = from_timer(mcs, t, led_timer2);
412
413 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
414 }
415
416 static void mos7840_led_activity(struct usb_serial_port *port)
417 {
418 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
419
420 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
421 return;
422
423 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
424 mod_timer(&mos7840_port->led_timer1,
425 jiffies + msecs_to_jiffies(LED_ON_MS));
426 }
427
428 /*****************************************************************************
429 * mos7840_bulk_in_callback
430 * this is the callback function for when we have received data on the
431 * bulk in endpoint.
432 *****************************************************************************/
433
434 static void mos7840_bulk_in_callback(struct urb *urb)
435 {
436 struct moschip_port *mos7840_port = urb->context;
437 struct usb_serial_port *port = mos7840_port->port;
438 int retval;
439 unsigned char *data;
440 int status = urb->status;
441
442 if (status) {
443 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
444 mos7840_port->read_urb_busy = false;
445 return;
446 }
447
448 data = urb->transfer_buffer;
449 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
450
451 if (urb->actual_length) {
452 struct tty_port *tport = &mos7840_port->port->port;
453 tty_insert_flip_string(tport, data, urb->actual_length);
454 tty_flip_buffer_push(tport);
455 port->icount.rx += urb->actual_length;
456 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
457 }
458
459 if (mos7840_port->has_led)
460 mos7840_led_activity(port);
461
462 mos7840_port->read_urb_busy = true;
463 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
464
465 if (retval) {
466 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
467 mos7840_port->read_urb_busy = false;
468 }
469 }
470
471 /*****************************************************************************
472 * mos7840_bulk_out_data_callback
473 * this is the callback function for when we have finished sending
474 * serial data on the bulk out endpoint.
475 *****************************************************************************/
476
477 static void mos7840_bulk_out_data_callback(struct urb *urb)
478 {
479 struct moschip_port *mos7840_port = urb->context;
480 struct usb_serial_port *port = mos7840_port->port;
481 int status = urb->status;
482 unsigned long flags;
483 int i;
484
485 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
486 for (i = 0; i < NUM_URBS; i++) {
487 if (urb == mos7840_port->write_urb_pool[i]) {
488 mos7840_port->busy[i] = 0;
489 break;
490 }
491 }
492 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
493
494 if (status) {
495 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
496 return;
497 }
498
499 tty_port_tty_wakeup(&port->port);
500
501 }
502
503 /************************************************************************/
504 /* 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 */
505 /************************************************************************/
506
507 /*****************************************************************************
508 * mos7840_open
509 * this function is called by the tty driver when a port is opened
510 * If successful, we return 0
511 * Otherwise we return a negative error number.
512 *****************************************************************************/
513
514 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
515 {
516 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
517 struct usb_serial *serial = port->serial;
518 int response;
519 int j;
520 struct urb *urb;
521 __u16 Data;
522 int status;
523
524 usb_clear_halt(serial->dev, port->write_urb->pipe);
525 usb_clear_halt(serial->dev, port->read_urb->pipe);
526
527 /* Initialising the write urb pool */
528 for (j = 0; j < NUM_URBS; ++j) {
529 urb = usb_alloc_urb(0, GFP_KERNEL);
530 mos7840_port->write_urb_pool[j] = urb;
531 if (!urb)
532 continue;
533
534 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
535 GFP_KERNEL);
536 if (!urb->transfer_buffer) {
537 usb_free_urb(urb);
538 mos7840_port->write_urb_pool[j] = NULL;
539 continue;
540 }
541 }
542
543 /*****************************************************************************
544 * Initialize MCS7840 -- Write Init values to corresponding Registers
545 *
546 * Register Index
547 * 1 : IER
548 * 2 : FCR
549 * 3 : LCR
550 * 4 : MCR
551 *
552 * 0x08 : SP1/2 Control Reg
553 *****************************************************************************/
554
555 /* NEED to check the following Block */
556
557 Data = 0x0;
558 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
559 if (status < 0) {
560 dev_dbg(&port->dev, "Reading Spreg failed\n");
561 goto err;
562 }
563 Data |= 0x80;
564 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
565 if (status < 0) {
566 dev_dbg(&port->dev, "writing Spreg failed\n");
567 goto err;
568 }
569
570 Data &= ~0x80;
571 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
572 if (status < 0) {
573 dev_dbg(&port->dev, "writing Spreg failed\n");
574 goto err;
575 }
576 /* End of block to be checked */
577
578 Data = 0x0;
579 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
580 &Data);
581 if (status < 0) {
582 dev_dbg(&port->dev, "Reading Controlreg failed\n");
583 goto err;
584 }
585 Data |= 0x08; /* Driver done bit */
586 Data |= 0x20; /* rx_disable */
587 status = mos7840_set_reg_sync(port,
588 mos7840_port->ControlRegOffset, Data);
589 if (status < 0) {
590 dev_dbg(&port->dev, "writing Controlreg failed\n");
591 goto err;
592 }
593 /* do register settings here */
594 /* Set all regs to the device default values. */
595 /***********************************
596 * First Disable all interrupts.
597 ***********************************/
598 Data = 0x00;
599 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
600 if (status < 0) {
601 dev_dbg(&port->dev, "disabling interrupts failed\n");
602 goto err;
603 }
604 /* Set FIFO_CONTROL_REGISTER to the default value */
605 Data = 0x00;
606 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
607 if (status < 0) {
608 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
609 goto err;
610 }
611
612 Data = 0xcf;
613 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
614 if (status < 0) {
615 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
616 goto err;
617 }
618
619 Data = 0x03;
620 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
621 mos7840_port->shadowLCR = Data;
622
623 Data = 0x0b;
624 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
625 mos7840_port->shadowMCR = Data;
626
627 Data = 0x00;
628 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
629 mos7840_port->shadowLCR = Data;
630
631 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
632 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
633
634 Data = 0x0c;
635 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
636
637 Data = 0x0;
638 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
639
640 Data = 0x00;
641 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
642
643 Data = Data & ~SERIAL_LCR_DLAB;
644 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
645 mos7840_port->shadowLCR = Data;
646
647 /* clearing Bulkin and Bulkout Fifo */
648 Data = 0x0;
649 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
650
651 Data = Data | 0x0c;
652 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
653
654 Data = Data & ~0x0c;
655 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
656 /* Finally enable all interrupts */
657 Data = 0x0c;
658 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
659
660 /* clearing rx_disable */
661 Data = 0x0;
662 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
663 &Data);
664 Data = Data & ~0x20;
665 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
666 Data);
667
668 /* rx_negate */
669 Data = 0x0;
670 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
671 &Data);
672 Data = Data | 0x10;
673 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
674 Data);
675
676 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
677 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
678 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
679 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
680 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
681 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
682 mos7840_port->read_urb = port->read_urb;
683
684 /* set up our bulk in urb */
685 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
686 usb_fill_bulk_urb(mos7840_port->read_urb,
687 serial->dev,
688 usb_rcvbulkpipe(serial->dev,
689 (port->bulk_in_endpointAddress) + 2),
690 port->bulk_in_buffer,
691 mos7840_port->read_urb->transfer_buffer_length,
692 mos7840_bulk_in_callback, mos7840_port);
693 } else {
694 usb_fill_bulk_urb(mos7840_port->read_urb,
695 serial->dev,
696 usb_rcvbulkpipe(serial->dev,
697 port->bulk_in_endpointAddress),
698 port->bulk_in_buffer,
699 mos7840_port->read_urb->transfer_buffer_length,
700 mos7840_bulk_in_callback, mos7840_port);
701 }
702
703 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
704 mos7840_port->read_urb_busy = true;
705 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
706 if (response) {
707 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
708 __func__, response);
709 mos7840_port->read_urb_busy = false;
710 }
711
712 /* initialize our port settings */
713 /* Must set to enable ints! */
714 mos7840_port->shadowMCR = MCR_MASTER_IE;
715
716 return 0;
717 err:
718 for (j = 0; j < NUM_URBS; ++j) {
719 urb = mos7840_port->write_urb_pool[j];
720 if (!urb)
721 continue;
722 kfree(urb->transfer_buffer);
723 usb_free_urb(urb);
724 }
725 return status;
726 }
727
728 /*****************************************************************************
729 * mos7840_chars_in_buffer
730 * this function is called by the tty driver when it wants to know how many
731 * bytes of data we currently have outstanding in the port (data that has
732 * been written, but hasn't made it out the port yet)
733 * If successful, we return the number of bytes left to be written in the
734 * system,
735 * Otherwise we return zero.
736 *****************************************************************************/
737
738 static int mos7840_chars_in_buffer(struct tty_struct *tty)
739 {
740 struct usb_serial_port *port = tty->driver_data;
741 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
742 int i;
743 int chars = 0;
744 unsigned long flags;
745
746 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
747 for (i = 0; i < NUM_URBS; ++i) {
748 if (mos7840_port->busy[i]) {
749 struct urb *urb = mos7840_port->write_urb_pool[i];
750 chars += urb->transfer_buffer_length;
751 }
752 }
753 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
754 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
755 return chars;
756
757 }
758
759 /*****************************************************************************
760 * mos7840_close
761 * this function is called by the tty driver when a port is closed
762 *****************************************************************************/
763
764 static void mos7840_close(struct usb_serial_port *port)
765 {
766 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
767 int j;
768 __u16 Data;
769
770 for (j = 0; j < NUM_URBS; ++j)
771 usb_kill_urb(mos7840_port->write_urb_pool[j]);
772
773 /* Freeing Write URBs */
774 for (j = 0; j < NUM_URBS; ++j) {
775 if (mos7840_port->write_urb_pool[j]) {
776 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer);
777 usb_free_urb(mos7840_port->write_urb_pool[j]);
778 }
779 }
780
781 usb_kill_urb(mos7840_port->read_urb);
782 mos7840_port->read_urb_busy = false;
783
784 Data = 0x0;
785 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
786
787 Data = 0x00;
788 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
789 }
790
791 /*****************************************************************************
792 * mos7840_break
793 * this function sends a break to the port
794 *****************************************************************************/
795 static void mos7840_break(struct tty_struct *tty, int break_state)
796 {
797 struct usb_serial_port *port = tty->driver_data;
798 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
799 unsigned char data;
800
801 if (break_state == -1)
802 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
803 else
804 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
805
806 /* FIXME: no locking on shadowLCR anywhere in driver */
807 mos7840_port->shadowLCR = data;
808 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
809 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
810 mos7840_port->shadowLCR);
811 }
812
813 /*****************************************************************************
814 * mos7840_write_room
815 * this function is called by the tty driver when it wants to know how many
816 * bytes of data we can accept for a specific port.
817 * If successful, we return the amount of room that we have for this port
818 * Otherwise we return a negative error number.
819 *****************************************************************************/
820
821 static int mos7840_write_room(struct tty_struct *tty)
822 {
823 struct usb_serial_port *port = tty->driver_data;
824 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
825 int i;
826 int room = 0;
827 unsigned long flags;
828
829 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
830 for (i = 0; i < NUM_URBS; ++i) {
831 if (!mos7840_port->busy[i])
832 room += URB_TRANSFER_BUFFER_SIZE;
833 }
834 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
835
836 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
837 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
838 return room;
839
840 }
841
842 /*****************************************************************************
843 * mos7840_write
844 * this function is called by the tty driver when data should be written to
845 * the port.
846 * If successful, we return the number of bytes written, otherwise we
847 * return a negative error number.
848 *****************************************************************************/
849
850 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
851 const unsigned char *data, int count)
852 {
853 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
854 struct usb_serial *serial = port->serial;
855 int status;
856 int i;
857 int bytes_sent = 0;
858 int transfer_size;
859 unsigned long flags;
860 struct urb *urb;
861 /* __u16 Data; */
862 const unsigned char *current_position = data;
863
864 /* try to find a free urb in the list */
865 urb = NULL;
866
867 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
868 for (i = 0; i < NUM_URBS; ++i) {
869 if (!mos7840_port->busy[i]) {
870 mos7840_port->busy[i] = 1;
871 urb = mos7840_port->write_urb_pool[i];
872 dev_dbg(&port->dev, "URB:%d\n", i);
873 break;
874 }
875 }
876 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
877
878 if (urb == NULL) {
879 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
880 goto exit;
881 }
882
883 if (urb->transfer_buffer == NULL) {
884 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
885 GFP_ATOMIC);
886 if (!urb->transfer_buffer)
887 goto exit;
888 }
889 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
890
891 memcpy(urb->transfer_buffer, current_position, transfer_size);
892
893 /* fill urb with data and submit */
894 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
895 usb_fill_bulk_urb(urb,
896 serial->dev,
897 usb_sndbulkpipe(serial->dev,
898 (port->bulk_out_endpointAddress) + 2),
899 urb->transfer_buffer,
900 transfer_size,
901 mos7840_bulk_out_data_callback, mos7840_port);
902 } else {
903 usb_fill_bulk_urb(urb,
904 serial->dev,
905 usb_sndbulkpipe(serial->dev,
906 port->bulk_out_endpointAddress),
907 urb->transfer_buffer,
908 transfer_size,
909 mos7840_bulk_out_data_callback, mos7840_port);
910 }
911
912 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
913
914 if (mos7840_port->has_led)
915 mos7840_led_activity(port);
916
917 /* send it down the pipe */
918 status = usb_submit_urb(urb, GFP_ATOMIC);
919
920 if (status) {
921 mos7840_port->busy[i] = 0;
922 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
923 "with status = %d\n", __func__, status);
924 bytes_sent = status;
925 goto exit;
926 }
927 bytes_sent = transfer_size;
928 port->icount.tx += transfer_size;
929 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
930 exit:
931 return bytes_sent;
932
933 }
934
935 /*****************************************************************************
936 * mos7840_throttle
937 * this function is called by the tty driver when it wants to stop the data
938 * being read from the port.
939 *****************************************************************************/
940
941 static void mos7840_throttle(struct tty_struct *tty)
942 {
943 struct usb_serial_port *port = tty->driver_data;
944 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
945 int status;
946
947 /* if we are implementing XON/XOFF, send the stop character */
948 if (I_IXOFF(tty)) {
949 unsigned char stop_char = STOP_CHAR(tty);
950 status = mos7840_write(tty, port, &stop_char, 1);
951 if (status <= 0)
952 return;
953 }
954 /* if we are implementing RTS/CTS, toggle that line */
955 if (C_CRTSCTS(tty)) {
956 mos7840_port->shadowMCR &= ~MCR_RTS;
957 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
958 mos7840_port->shadowMCR);
959 if (status < 0)
960 return;
961 }
962 }
963
964 /*****************************************************************************
965 * mos7840_unthrottle
966 * this function is called by the tty driver when it wants to resume
967 * the data being read from the port (called after mos7840_throttle is
968 * called)
969 *****************************************************************************/
970 static void mos7840_unthrottle(struct tty_struct *tty)
971 {
972 struct usb_serial_port *port = tty->driver_data;
973 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
974 int status;
975
976 /* if we are implementing XON/XOFF, send the start character */
977 if (I_IXOFF(tty)) {
978 unsigned char start_char = START_CHAR(tty);
979 status = mos7840_write(tty, port, &start_char, 1);
980 if (status <= 0)
981 return;
982 }
983
984 /* if we are implementing RTS/CTS, toggle that line */
985 if (C_CRTSCTS(tty)) {
986 mos7840_port->shadowMCR |= MCR_RTS;
987 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
988 mos7840_port->shadowMCR);
989 if (status < 0)
990 return;
991 }
992 }
993
994 static int mos7840_tiocmget(struct tty_struct *tty)
995 {
996 struct usb_serial_port *port = tty->driver_data;
997 unsigned int result;
998 __u16 msr;
999 __u16 mcr;
1000 int status;
1001
1002 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1003 if (status < 0)
1004 return -EIO;
1005 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1006 if (status < 0)
1007 return -EIO;
1008 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1009 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1010 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1011 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1012 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1013 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1014 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1015
1016 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1017
1018 return result;
1019 }
1020
1021 static int mos7840_tiocmset(struct tty_struct *tty,
1022 unsigned int set, unsigned int clear)
1023 {
1024 struct usb_serial_port *port = tty->driver_data;
1025 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1026 unsigned int mcr;
1027 int status;
1028
1029 /* FIXME: What locks the port registers ? */
1030 mcr = mos7840_port->shadowMCR;
1031 if (clear & TIOCM_RTS)
1032 mcr &= ~MCR_RTS;
1033 if (clear & TIOCM_DTR)
1034 mcr &= ~MCR_DTR;
1035 if (clear & TIOCM_LOOP)
1036 mcr &= ~MCR_LOOPBACK;
1037
1038 if (set & TIOCM_RTS)
1039 mcr |= MCR_RTS;
1040 if (set & TIOCM_DTR)
1041 mcr |= MCR_DTR;
1042 if (set & TIOCM_LOOP)
1043 mcr |= MCR_LOOPBACK;
1044
1045 mos7840_port->shadowMCR = mcr;
1046
1047 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1048 if (status < 0) {
1049 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1050 return status;
1051 }
1052
1053 return 0;
1054 }
1055
1056 /*****************************************************************************
1057 * mos7840_calc_baud_rate_divisor
1058 * this function calculates the proper baud rate divisor for the specified
1059 * baud rate.
1060 *****************************************************************************/
1061 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1062 int baudRate, int *divisor,
1063 __u16 *clk_sel_val)
1064 {
1065 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1066
1067 if (baudRate <= 115200) {
1068 *divisor = 115200 / baudRate;
1069 *clk_sel_val = 0x0;
1070 }
1071 if ((baudRate > 115200) && (baudRate <= 230400)) {
1072 *divisor = 230400 / baudRate;
1073 *clk_sel_val = 0x10;
1074 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1075 *divisor = 403200 / baudRate;
1076 *clk_sel_val = 0x20;
1077 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1078 *divisor = 460800 / baudRate;
1079 *clk_sel_val = 0x30;
1080 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1081 *divisor = 806400 / baudRate;
1082 *clk_sel_val = 0x40;
1083 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1084 *divisor = 921600 / baudRate;
1085 *clk_sel_val = 0x50;
1086 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1087 *divisor = 1572864 / baudRate;
1088 *clk_sel_val = 0x60;
1089 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1090 *divisor = 3145728 / baudRate;
1091 *clk_sel_val = 0x70;
1092 }
1093 return 0;
1094 }
1095
1096 /*****************************************************************************
1097 * mos7840_send_cmd_write_baud_rate
1098 * this function sends the proper command to change the baud rate of the
1099 * specified port.
1100 *****************************************************************************/
1101
1102 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1103 int baudRate)
1104 {
1105 struct usb_serial_port *port = mos7840_port->port;
1106 int divisor = 0;
1107 int status;
1108 __u16 Data;
1109 __u16 clk_sel_val;
1110
1111 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1112 /* reset clk_uart_sel in spregOffset */
1113 if (baudRate > 115200) {
1114 #ifdef HW_flow_control
1115 /* NOTE: need to see the pther register to modify */
1116 /* setting h/w flow control bit to 1 */
1117 Data = 0x2b;
1118 mos7840_port->shadowMCR = Data;
1119 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1120 Data);
1121 if (status < 0) {
1122 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1123 return -1;
1124 }
1125 #endif
1126
1127 } else {
1128 #ifdef HW_flow_control
1129 /* setting h/w flow control bit to 0 */
1130 Data = 0xb;
1131 mos7840_port->shadowMCR = Data;
1132 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1133 Data);
1134 if (status < 0) {
1135 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1136 return -1;
1137 }
1138 #endif
1139
1140 }
1141
1142 if (1) { /* baudRate <= 115200) */
1143 clk_sel_val = 0x0;
1144 Data = 0x0;
1145 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1146 &clk_sel_val);
1147 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1148 &Data);
1149 if (status < 0) {
1150 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1151 return -1;
1152 }
1153 Data = (Data & 0x8f) | clk_sel_val;
1154 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1155 Data);
1156 if (status < 0) {
1157 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1158 return -1;
1159 }
1160 /* Calculate the Divisor */
1161
1162 if (status) {
1163 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1164 return status;
1165 }
1166 /* Enable access to divisor latch */
1167 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1168 mos7840_port->shadowLCR = Data;
1169 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1170
1171 /* Write the divisor */
1172 Data = (unsigned char)(divisor & 0xff);
1173 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1174 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1175
1176 Data = (unsigned char)((divisor & 0xff00) >> 8);
1177 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1178 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1179
1180 /* Disable access to divisor latch */
1181 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1182 mos7840_port->shadowLCR = Data;
1183 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1184
1185 }
1186 return status;
1187 }
1188
1189 /*****************************************************************************
1190 * mos7840_change_port_settings
1191 * This routine is called to set the UART on the device to match
1192 * the specified new settings.
1193 *****************************************************************************/
1194
1195 static void mos7840_change_port_settings(struct tty_struct *tty,
1196 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1197 {
1198 struct usb_serial_port *port = mos7840_port->port;
1199 int baud;
1200 unsigned cflag;
1201 __u8 lData;
1202 __u8 lParity;
1203 __u8 lStop;
1204 int status;
1205 __u16 Data;
1206
1207 lData = LCR_BITS_8;
1208 lStop = LCR_STOP_1;
1209 lParity = LCR_PAR_NONE;
1210
1211 cflag = tty->termios.c_cflag;
1212
1213 /* Change the number of bits */
1214 switch (cflag & CSIZE) {
1215 case CS5:
1216 lData = LCR_BITS_5;
1217 break;
1218
1219 case CS6:
1220 lData = LCR_BITS_6;
1221 break;
1222
1223 case CS7:
1224 lData = LCR_BITS_7;
1225 break;
1226
1227 default:
1228 case CS8:
1229 lData = LCR_BITS_8;
1230 break;
1231 }
1232
1233 /* Change the Parity bit */
1234 if (cflag & PARENB) {
1235 if (cflag & PARODD) {
1236 lParity = LCR_PAR_ODD;
1237 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1238 } else {
1239 lParity = LCR_PAR_EVEN;
1240 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1241 }
1242
1243 } else {
1244 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1245 }
1246
1247 if (cflag & CMSPAR)
1248 lParity = lParity | 0x20;
1249
1250 /* Change the Stop bit */
1251 if (cflag & CSTOPB) {
1252 lStop = LCR_STOP_2;
1253 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1254 } else {
1255 lStop = LCR_STOP_1;
1256 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1257 }
1258
1259 /* Update the LCR with the correct value */
1260 mos7840_port->shadowLCR &=
1261 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1262 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1263
1264 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1265 mos7840_port->shadowLCR);
1266 /* Disable Interrupts */
1267 Data = 0x00;
1268 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1269
1270 Data = 0x00;
1271 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1272
1273 Data = 0xcf;
1274 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1275
1276 /* Send the updated LCR value to the mos7840 */
1277 Data = mos7840_port->shadowLCR;
1278
1279 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1280
1281 Data = 0x00b;
1282 mos7840_port->shadowMCR = Data;
1283 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1284 Data = 0x00b;
1285 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1286
1287 /* set up the MCR register and send it to the mos7840 */
1288
1289 mos7840_port->shadowMCR = MCR_MASTER_IE;
1290 if (cflag & CBAUD)
1291 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1292
1293 if (cflag & CRTSCTS)
1294 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1295 else
1296 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1297
1298 Data = mos7840_port->shadowMCR;
1299 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1300
1301 /* Determine divisor based on baud rate */
1302 baud = tty_get_baud_rate(tty);
1303
1304 if (!baud) {
1305 /* pick a default, any default... */
1306 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1307 baud = 9600;
1308 }
1309
1310 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1311 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1312
1313 /* Enable Interrupts */
1314 Data = 0x0c;
1315 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1316
1317 if (!mos7840_port->read_urb_busy) {
1318 mos7840_port->read_urb_busy = true;
1319 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1320 if (status) {
1321 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1322 status);
1323 mos7840_port->read_urb_busy = false;
1324 }
1325 }
1326 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1327 mos7840_port->shadowLCR);
1328 }
1329
1330 /*****************************************************************************
1331 * mos7840_set_termios
1332 * this function is called by the tty driver when it wants to change
1333 * the termios structure
1334 *****************************************************************************/
1335
1336 static void mos7840_set_termios(struct tty_struct *tty,
1337 struct usb_serial_port *port,
1338 struct ktermios *old_termios)
1339 {
1340 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1341 int status;
1342
1343 /* change the port settings to the new ones specified */
1344
1345 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1346
1347 if (!mos7840_port->read_urb_busy) {
1348 mos7840_port->read_urb_busy = true;
1349 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1350 if (status) {
1351 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1352 status);
1353 mos7840_port->read_urb_busy = false;
1354 }
1355 }
1356 }
1357
1358 /*****************************************************************************
1359 * mos7840_get_lsr_info - get line status register info
1360 *
1361 * Purpose: Let user call ioctl() to get info when the UART physically
1362 * is emptied. On bus types like RS485, the transmitter must
1363 * release the bus after transmitting. This must be done when
1364 * the transmit shift register is empty, not be done when the
1365 * transmit holding register is empty. This functionality
1366 * allows an RS485 driver to be written in user space.
1367 *****************************************************************************/
1368
1369 static int mos7840_get_lsr_info(struct tty_struct *tty,
1370 unsigned int __user *value)
1371 {
1372 int count;
1373 unsigned int result = 0;
1374
1375 count = mos7840_chars_in_buffer(tty);
1376 if (count == 0)
1377 result = TIOCSER_TEMT;
1378
1379 if (copy_to_user(value, &result, sizeof(int)))
1380 return -EFAULT;
1381 return 0;
1382 }
1383
1384 /*****************************************************************************
1385 * mos7840_get_serial_info
1386 * function to get information about serial port
1387 *****************************************************************************/
1388
1389 static int mos7840_get_serial_info(struct tty_struct *tty,
1390 struct serial_struct *ss)
1391 {
1392 struct usb_serial_port *port = tty->driver_data;
1393 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1394
1395 ss->type = PORT_16550A;
1396 ss->line = mos7840_port->port->minor;
1397 ss->port = mos7840_port->port->port_number;
1398 ss->irq = 0;
1399 ss->xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1400 ss->baud_base = 9600;
1401 ss->close_delay = 5 * HZ;
1402 ss->closing_wait = 30 * HZ;
1403 return 0;
1404 }
1405
1406 /*****************************************************************************
1407 * SerialIoctl
1408 * this function handles any ioctl calls to the driver
1409 *****************************************************************************/
1410
1411 static int mos7840_ioctl(struct tty_struct *tty,
1412 unsigned int cmd, unsigned long arg)
1413 {
1414 struct usb_serial_port *port = tty->driver_data;
1415 void __user *argp = (void __user *)arg;
1416
1417 switch (cmd) {
1418 /* return number of bytes available */
1419
1420 case TIOCSERGETLSR:
1421 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1422 return mos7840_get_lsr_info(tty, argp);
1423
1424 default:
1425 break;
1426 }
1427 return -ENOIOCTLCMD;
1428 }
1429
1430 /*
1431 * Check if GPO (pin 42) is connected to GPI (pin 33) as recommended by ASIX
1432 * for MCS7810 by bit-banging a 16-bit word.
1433 *
1434 * Note that GPO is really RTS of the third port so this will toggle RTS of
1435 * port two or three on two- and four-port devices.
1436 */
1437 static int mos7810_check(struct usb_serial *serial)
1438 {
1439 int i, pass_count = 0;
1440 u8 *buf;
1441 __u16 data = 0, mcr_data = 0;
1442 __u16 test_pattern = 0x55AA;
1443 int res;
1444
1445 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
1446 if (!buf)
1447 return 0; /* failed to identify 7810 */
1448
1449 /* Store MCR setting */
1450 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
1451 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
1452 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1453 if (res == VENDOR_READ_LENGTH)
1454 mcr_data = *buf;
1455
1456 for (i = 0; i < 16; i++) {
1457 /* Send the 1-bit test pattern out to MCS7810 test pin */
1458 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
1459 MCS_WRREQ, MCS_WR_RTYPE,
1460 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
1461 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
1462
1463 /* Read the test pattern back */
1464 res = usb_control_msg(serial->dev,
1465 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
1466 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
1467 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1468 if (res == VENDOR_READ_LENGTH)
1469 data = *buf;
1470
1471 /* If this is a MCS7810 device, both test patterns must match */
1472 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
1473 break;
1474
1475 pass_count++;
1476 }
1477
1478 /* Restore MCR setting */
1479 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
1480 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
1481 0, MOS_WDR_TIMEOUT);
1482
1483 kfree(buf);
1484
1485 if (pass_count == 16)
1486 return 1;
1487
1488 return 0;
1489 }
1490
1491 static int mos7840_probe(struct usb_serial *serial,
1492 const struct usb_device_id *id)
1493 {
1494 unsigned long device_flags = id->driver_info;
1495 u8 *buf;
1496
1497 /* Skip device-type detection if we already have device flags. */
1498 if (device_flags)
1499 goto out;
1500
1501 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
1502 if (!buf)
1503 return -ENOMEM;
1504
1505 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
1506 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
1507 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
1508
1509 /* For a MCS7840 device GPIO0 must be set to 1 */
1510 if (buf[0] & 0x01)
1511 device_flags = MCS_PORTS(4);
1512 else if (mos7810_check(serial))
1513 device_flags = MCS_PORTS(1) | MCS_LED;
1514 else
1515 device_flags = MCS_PORTS(2);
1516
1517 kfree(buf);
1518 out:
1519 usb_set_serial_data(serial, (void *)device_flags);
1520
1521 return 0;
1522 }
1523
1524 static int mos7840_calc_num_ports(struct usb_serial *serial,
1525 struct usb_serial_endpoints *epds)
1526 {
1527 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
1528 int num_ports = MCS_PORTS(device_flags);
1529
1530 if (num_ports == 0 || num_ports > 4)
1531 return -ENODEV;
1532
1533 if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) {
1534 dev_err(&serial->interface->dev, "missing endpoints\n");
1535 return -ENODEV;
1536 }
1537
1538 return num_ports;
1539 }
1540
1541 static int mos7840_attach(struct usb_serial *serial)
1542 {
1543 struct device *dev = &serial->interface->dev;
1544 int status;
1545 u16 val;
1546
1547 /* Zero Length flag enable */
1548 val = 0x0f;
1549 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, val);
1550 if (status < 0)
1551 dev_dbg(dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
1552 else
1553 dev_dbg(dev, "ZLP_REG5 Writing success status%d\n", status);
1554
1555 return status;
1556 }
1557
1558 static int mos7840_port_probe(struct usb_serial_port *port)
1559 {
1560 struct usb_serial *serial = port->serial;
1561 unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
1562 struct moschip_port *mos7840_port;
1563 int status;
1564 int pnum;
1565 __u16 Data;
1566
1567 /* we set up the pointers to the endpoints in the mos7840_open *
1568 * function, as the structures aren't created yet. */
1569
1570 pnum = port->port_number;
1571
1572 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
1573 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
1574 if (!mos7840_port)
1575 return -ENOMEM;
1576
1577 /* Initialize all port interrupt end point to port 0 int
1578 * endpoint. Our device has only one interrupt end point
1579 * common to all port */
1580
1581 mos7840_port->port = port;
1582 spin_lock_init(&mos7840_port->pool_lock);
1583
1584 /* minor is not initialised until later by
1585 * usb-serial.c:get_free_serial() and cannot therefore be used
1586 * to index device instances */
1587 mos7840_port->port_num = pnum + 1;
1588 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
1589 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
1590
1591 if (mos7840_port->port_num == 1) {
1592 mos7840_port->SpRegOffset = 0x0;
1593 mos7840_port->ControlRegOffset = 0x1;
1594 mos7840_port->DcrRegOffset = 0x4;
1595 } else {
1596 u8 phy_num = mos7840_port->port_num;
1597
1598 /* Port 2 in the 2-port case uses registers of port 3 */
1599 if (serial->num_ports == 2)
1600 phy_num = 3;
1601
1602 mos7840_port->SpRegOffset = 0x8 + 2 * (phy_num - 2);
1603 mos7840_port->ControlRegOffset = 0x9 + 2 * (phy_num - 2);
1604 mos7840_port->DcrRegOffset = 0x16 + 3 * (phy_num - 2);
1605 }
1606 mos7840_dump_serial_port(port, mos7840_port);
1607 usb_set_serial_port_data(port, mos7840_port);
1608
1609 /* enable rx_disable bit in control register */
1610 status = mos7840_get_reg_sync(port,
1611 mos7840_port->ControlRegOffset, &Data);
1612 if (status < 0) {
1613 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
1614 goto error;
1615 } else
1616 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
1617 Data |= 0x08; /* setting driver done bit */
1618 Data |= 0x04; /* sp1_bit to have cts change reflect in
1619 modem status reg */
1620
1621 /* Data |= 0x20; //rx_disable bit */
1622 status = mos7840_set_reg_sync(port,
1623 mos7840_port->ControlRegOffset, Data);
1624 if (status < 0) {
1625 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
1626 goto error;
1627 } else
1628 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
1629
1630 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
1631 and 0x24 in DCR3 */
1632 Data = 0x01;
1633 status = mos7840_set_reg_sync(port,
1634 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
1635 if (status < 0) {
1636 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
1637 goto error;
1638 } else
1639 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
1640
1641 Data = 0x05;
1642 status = mos7840_set_reg_sync(port,
1643 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
1644 if (status < 0) {
1645 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
1646 goto error;
1647 } else
1648 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
1649
1650 Data = 0x24;
1651 status = mos7840_set_reg_sync(port,
1652 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
1653 if (status < 0) {
1654 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
1655 goto error;
1656 } else
1657 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
1658
1659 /* write values in clkstart0x0 and clkmulti 0x20 */
1660 Data = 0x0;
1661 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
1662 if (status < 0) {
1663 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
1664 goto error;
1665 } else
1666 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
1667
1668 Data = 0x20;
1669 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
1670 if (status < 0) {
1671 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
1672 goto error;
1673 } else
1674 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
1675
1676 /* write value 0x0 to scratchpad register */
1677 Data = 0x00;
1678 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
1679 if (status < 0) {
1680 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
1681 goto error;
1682 } else
1683 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
1684
1685 /* Zero Length flag register */
1686 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
1687 Data = 0xff;
1688 status = mos7840_set_reg_sync(port,
1689 (__u16) (ZLP_REG1 +
1690 ((__u16)mos7840_port->port_num)), Data);
1691 dev_dbg(&port->dev, "ZLIP offset %x\n",
1692 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
1693 if (status < 0) {
1694 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
1695 goto error;
1696 } else
1697 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
1698 } else {
1699 Data = 0xff;
1700 status = mos7840_set_reg_sync(port,
1701 (__u16) (ZLP_REG1 +
1702 ((__u16)mos7840_port->port_num) - 0x1), Data);
1703 dev_dbg(&port->dev, "ZLIP offset %x\n",
1704 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
1705 if (status < 0) {
1706 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
1707 goto error;
1708 } else
1709 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
1710
1711 }
1712
1713 mos7840_port->has_led = device_flags & MCS_LED;
1714
1715 /* Initialize LED timers */
1716 if (mos7840_port->has_led) {
1717 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
1718 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
1719 GFP_KERNEL);
1720 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
1721 status = -ENOMEM;
1722 goto error;
1723 }
1724
1725 timer_setup(&mos7840_port->led_timer1, mos7840_led_off, 0);
1726 mos7840_port->led_timer1.expires =
1727 jiffies + msecs_to_jiffies(LED_ON_MS);
1728 timer_setup(&mos7840_port->led_timer2, mos7840_led_flag_off,
1729 0);
1730 mos7840_port->led_timer2.expires =
1731 jiffies + msecs_to_jiffies(LED_OFF_MS);
1732
1733 /* Turn off LED */
1734 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
1735 }
1736
1737 return 0;
1738 error:
1739 kfree(mos7840_port->led_dr);
1740 usb_free_urb(mos7840_port->led_urb);
1741 kfree(mos7840_port);
1742
1743 return status;
1744 }
1745
1746 static int mos7840_port_remove(struct usb_serial_port *port)
1747 {
1748 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
1749
1750 if (mos7840_port->has_led) {
1751 /* Turn off LED */
1752 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
1753
1754 del_timer_sync(&mos7840_port->led_timer1);
1755 del_timer_sync(&mos7840_port->led_timer2);
1756
1757 usb_kill_urb(mos7840_port->led_urb);
1758 usb_free_urb(mos7840_port->led_urb);
1759 kfree(mos7840_port->led_dr);
1760 }
1761
1762 kfree(mos7840_port);
1763
1764 return 0;
1765 }
1766
1767 static struct usb_serial_driver moschip7840_4port_device = {
1768 .driver = {
1769 .owner = THIS_MODULE,
1770 .name = "mos7840",
1771 },
1772 .description = DRIVER_DESC,
1773 .id_table = id_table,
1774 .num_interrupt_in = 1,
1775 .open = mos7840_open,
1776 .close = mos7840_close,
1777 .write = mos7840_write,
1778 .write_room = mos7840_write_room,
1779 .chars_in_buffer = mos7840_chars_in_buffer,
1780 .throttle = mos7840_throttle,
1781 .unthrottle = mos7840_unthrottle,
1782 .calc_num_ports = mos7840_calc_num_ports,
1783 .probe = mos7840_probe,
1784 .attach = mos7840_attach,
1785 .ioctl = mos7840_ioctl,
1786 .get_serial = mos7840_get_serial_info,
1787 .set_termios = mos7840_set_termios,
1788 .break_ctl = mos7840_break,
1789 .tiocmget = mos7840_tiocmget,
1790 .tiocmset = mos7840_tiocmset,
1791 .get_icount = usb_serial_generic_get_icount,
1792 .port_probe = mos7840_port_probe,
1793 .port_remove = mos7840_port_remove,
1794 .read_bulk_callback = mos7840_bulk_in_callback,
1795 };
1796
1797 static struct usb_serial_driver * const serial_drivers[] = {
1798 &moschip7840_4port_device, NULL
1799 };
1800
1801 module_usb_serial_driver(serial_drivers, id_table);
1802
1803 MODULE_DESCRIPTION(DRIVER_DESC);
1804 MODULE_LICENSE("GPL");
Linux with added FPC-III support