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Merge remote-tracking branch 'mkp-scsi/4.8/scsi-fixes' into fixes
[deliverable/linux.git] / drivers / usb / serial / mos7840.c
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
18 *
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
22 *
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/errno.h>
27 #include <linux/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 *write_urb; /* write URB for this port */
218 struct urb *read_urb; /* read URB for this port */
219 __u8 shadowLCR; /* last LCR value received */
220 __u8 shadowMCR; /* last MCR value received */
221 char open;
222 char open_ports;
223 struct usb_serial_port *port; /* loop back to the owner of this object */
224
225 /* Offsets */
226 __u8 SpRegOffset;
227 __u8 ControlRegOffset;
228 __u8 DcrRegOffset;
229 /* for processing control URBS in interrupt context */
230 struct urb *control_urb;
231 struct usb_ctrlrequest *dr;
232 char *ctrl_buf;
233 int MsrLsr;
234
235 spinlock_t pool_lock;
236 struct urb *write_urb_pool[NUM_URBS];
237 char busy[NUM_URBS];
238 bool read_urb_busy;
239
240 /* For device(s) with LED indicator */
241 bool has_led;
242 struct timer_list led_timer1; /* Timer for LED on */
243 struct timer_list led_timer2; /* Timer for LED off */
244 struct urb *led_urb;
245 struct usb_ctrlrequest *led_dr;
246
247 unsigned long flags;
248 };
249
250 /*
251 * mos7840_set_reg_sync
252 * To set the Control register by calling usb_fill_control_urb function
253 * by passing usb_sndctrlpipe function as parameter.
254 */
255
256 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
257 __u16 val)
258 {
259 struct usb_device *dev = port->serial->dev;
260 val = val & 0x00ff;
261 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
262
263 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
264 MCS_WR_RTYPE, val, reg, NULL, 0,
265 MOS_WDR_TIMEOUT);
266 }
267
268 /*
269 * mos7840_get_reg_sync
270 * To set the Uart register by calling usb_fill_control_urb function by
271 * passing usb_rcvctrlpipe function as parameter.
272 */
273
274 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
275 __u16 *val)
276 {
277 struct usb_device *dev = port->serial->dev;
278 int ret = 0;
279 u8 *buf;
280
281 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
282 if (!buf)
283 return -ENOMEM;
284
285 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
286 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
287 MOS_WDR_TIMEOUT);
288 *val = buf[0];
289 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
290
291 kfree(buf);
292 return ret;
293 }
294
295 /*
296 * mos7840_set_uart_reg
297 * To set the Uart register by calling usb_fill_control_urb function by
298 * passing usb_sndctrlpipe function as parameter.
299 */
300
301 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
302 __u16 val)
303 {
304
305 struct usb_device *dev = port->serial->dev;
306 val = val & 0x00ff;
307 /* For the UART control registers, the application number need
308 to be Or'ed */
309 if (port->serial->num_ports == 4) {
310 val |= ((__u16)port->port_number + 1) << 8;
311 } else {
312 if (port->port_number == 0) {
313 val |= ((__u16)port->port_number + 1) << 8;
314 } else {
315 val |= ((__u16)port->port_number + 2) << 8;
316 }
317 }
318 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
319 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
320 MCS_WR_RTYPE, val, reg, NULL, 0,
321 MOS_WDR_TIMEOUT);
322
323 }
324
325 /*
326 * mos7840_get_uart_reg
327 * To set the Control register by calling usb_fill_control_urb function
328 * by passing usb_rcvctrlpipe function as parameter.
329 */
330 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
331 __u16 *val)
332 {
333 struct usb_device *dev = port->serial->dev;
334 int ret = 0;
335 __u16 Wval;
336 u8 *buf;
337
338 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
339 if (!buf)
340 return -ENOMEM;
341
342 /* Wval is same as application number */
343 if (port->serial->num_ports == 4) {
344 Wval = ((__u16)port->port_number + 1) << 8;
345 } else {
346 if (port->port_number == 0) {
347 Wval = ((__u16)port->port_number + 1) << 8;
348 } else {
349 Wval = ((__u16)port->port_number + 2) << 8;
350 }
351 }
352 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
353 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
354 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
355 MOS_WDR_TIMEOUT);
356 *val = buf[0];
357
358 kfree(buf);
359 return ret;
360 }
361
362 static void mos7840_dump_serial_port(struct usb_serial_port *port,
363 struct moschip_port *mos7840_port)
364 {
365
366 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
367 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
368 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
369
370 }
371
372 /************************************************************************/
373 /************************************************************************/
374 /* I N T E R F A C E F U N C T I O N S */
375 /* I N T E R F A C E F U N C T I O N S */
376 /************************************************************************/
377 /************************************************************************/
378
379 static inline void mos7840_set_port_private(struct usb_serial_port *port,
380 struct moschip_port *data)
381 {
382 usb_set_serial_port_data(port, (void *)data);
383 }
384
385 static inline struct moschip_port *mos7840_get_port_private(struct
386 usb_serial_port
387 *port)
388 {
389 return (struct moschip_port *)usb_get_serial_port_data(port);
390 }
391
392 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
393 {
394 struct moschip_port *mos7840_port;
395 struct async_icount *icount;
396 mos7840_port = port;
397 if (new_msr &
398 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
399 MOS_MSR_DELTA_CD)) {
400 icount = &mos7840_port->port->icount;
401
402 /* update input line counters */
403 if (new_msr & MOS_MSR_DELTA_CTS)
404 icount->cts++;
405 if (new_msr & MOS_MSR_DELTA_DSR)
406 icount->dsr++;
407 if (new_msr & MOS_MSR_DELTA_CD)
408 icount->dcd++;
409 if (new_msr & MOS_MSR_DELTA_RI)
410 icount->rng++;
411
412 wake_up_interruptible(&port->port->port.delta_msr_wait);
413 }
414 }
415
416 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
417 {
418 struct async_icount *icount;
419
420 if (new_lsr & SERIAL_LSR_BI) {
421 /*
422 * Parity and Framing errors only count if they
423 * occur exclusive of a break being
424 * received.
425 */
426 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
427 }
428
429 /* update input line counters */
430 icount = &port->port->icount;
431 if (new_lsr & SERIAL_LSR_BI)
432 icount->brk++;
433 if (new_lsr & SERIAL_LSR_OE)
434 icount->overrun++;
435 if (new_lsr & SERIAL_LSR_PE)
436 icount->parity++;
437 if (new_lsr & SERIAL_LSR_FE)
438 icount->frame++;
439 }
440
441 /************************************************************************/
442 /************************************************************************/
443 /* U S B C A L L B A C K F U N C T I O N S */
444 /* U S B C A L L B A C K F U N C T I O N S */
445 /************************************************************************/
446 /************************************************************************/
447
448 static void mos7840_control_callback(struct urb *urb)
449 {
450 unsigned char *data;
451 struct moschip_port *mos7840_port;
452 struct device *dev = &urb->dev->dev;
453 __u8 regval = 0x0;
454 int status = urb->status;
455
456 mos7840_port = urb->context;
457
458 switch (status) {
459 case 0:
460 /* success */
461 break;
462 case -ECONNRESET:
463 case -ENOENT:
464 case -ESHUTDOWN:
465 /* this urb is terminated, clean up */
466 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
467 goto out;
468 default:
469 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
470 goto out;
471 }
472
473 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
474 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
475 mos7840_port->MsrLsr, mos7840_port->port_num);
476 data = urb->transfer_buffer;
477 regval = (__u8) data[0];
478 dev_dbg(dev, "%s data is %x\n", __func__, regval);
479 if (mos7840_port->MsrLsr == 0)
480 mos7840_handle_new_msr(mos7840_port, regval);
481 else if (mos7840_port->MsrLsr == 1)
482 mos7840_handle_new_lsr(mos7840_port, regval);
483 out:
484 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
485 }
486
487 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
488 __u16 *val)
489 {
490 struct usb_device *dev = mcs->port->serial->dev;
491 struct usb_ctrlrequest *dr = mcs->dr;
492 unsigned char *buffer = mcs->ctrl_buf;
493 int ret;
494
495 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
496 return -EBUSY;
497
498 dr->bRequestType = MCS_RD_RTYPE;
499 dr->bRequest = MCS_RDREQ;
500 dr->wValue = cpu_to_le16(Wval); /* 0 */
501 dr->wIndex = cpu_to_le16(reg);
502 dr->wLength = cpu_to_le16(2);
503
504 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
505 (unsigned char *)dr, buffer, 2,
506 mos7840_control_callback, mcs);
507 mcs->control_urb->transfer_buffer_length = 2;
508 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
509 if (ret)
510 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
511
512 return ret;
513 }
514
515 static void mos7840_set_led_callback(struct urb *urb)
516 {
517 switch (urb->status) {
518 case 0:
519 /* Success */
520 break;
521 case -ECONNRESET:
522 case -ENOENT:
523 case -ESHUTDOWN:
524 /* This urb is terminated, clean up */
525 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n",
526 __func__, urb->status);
527 break;
528 default:
529 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n",
530 __func__, urb->status);
531 }
532 }
533
534 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
535 __u16 reg)
536 {
537 struct usb_device *dev = mcs->port->serial->dev;
538 struct usb_ctrlrequest *dr = mcs->led_dr;
539
540 dr->bRequestType = MCS_WR_RTYPE;
541 dr->bRequest = MCS_WRREQ;
542 dr->wValue = cpu_to_le16(wval);
543 dr->wIndex = cpu_to_le16(reg);
544 dr->wLength = cpu_to_le16(0);
545
546 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
547 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
548
549 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
550 }
551
552 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
553 __u16 val)
554 {
555 struct usb_device *dev = port->serial->dev;
556
557 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
558 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
559 }
560
561 static void mos7840_led_off(unsigned long arg)
562 {
563 struct moschip_port *mcs = (struct moschip_port *) arg;
564
565 /* Turn off LED */
566 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
567 mod_timer(&mcs->led_timer2,
568 jiffies + msecs_to_jiffies(LED_OFF_MS));
569 }
570
571 static void mos7840_led_flag_off(unsigned long arg)
572 {
573 struct moschip_port *mcs = (struct moschip_port *) arg;
574
575 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
576 }
577
578 static void mos7840_led_activity(struct usb_serial_port *port)
579 {
580 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
581
582 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
583 return;
584
585 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
586 mod_timer(&mos7840_port->led_timer1,
587 jiffies + msecs_to_jiffies(LED_ON_MS));
588 }
589
590 /*****************************************************************************
591 * mos7840_interrupt_callback
592 * this is the callback function for when we have received data on the
593 * interrupt endpoint.
594 *****************************************************************************/
595
596 static void mos7840_interrupt_callback(struct urb *urb)
597 {
598 int result;
599 int length;
600 struct moschip_port *mos7840_port;
601 struct usb_serial *serial;
602 __u16 Data;
603 unsigned char *data;
604 __u8 sp[5], st;
605 int i, rv = 0;
606 __u16 wval, wreg = 0;
607 int status = urb->status;
608
609 switch (status) {
610 case 0:
611 /* success */
612 break;
613 case -ECONNRESET:
614 case -ENOENT:
615 case -ESHUTDOWN:
616 /* this urb is terminated, clean up */
617 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
618 __func__, status);
619 return;
620 default:
621 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
622 __func__, status);
623 goto exit;
624 }
625
626 length = urb->actual_length;
627 data = urb->transfer_buffer;
628
629 serial = urb->context;
630
631 /* Moschip get 5 bytes
632 * Byte 1 IIR Port 1 (port.number is 0)
633 * Byte 2 IIR Port 2 (port.number is 1)
634 * Byte 3 IIR Port 3 (port.number is 2)
635 * Byte 4 IIR Port 4 (port.number is 3)
636 * Byte 5 FIFO status for both */
637
638 if (length > 5) {
639 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
640 return;
641 }
642
643 sp[0] = (__u8) data[0];
644 sp[1] = (__u8) data[1];
645 sp[2] = (__u8) data[2];
646 sp[3] = (__u8) data[3];
647 st = (__u8) data[4];
648
649 for (i = 0; i < serial->num_ports; i++) {
650 mos7840_port = mos7840_get_port_private(serial->port[i]);
651 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
652 if (mos7840_port->open) {
653 if (sp[i] & 0x01) {
654 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
655 } else {
656 switch (sp[i] & 0x0f) {
657 case SERIAL_IIR_RLS:
658 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
659 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
660 mos7840_port->MsrLsr = 1;
661 wreg = LINE_STATUS_REGISTER;
662 break;
663 case SERIAL_IIR_MS:
664 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
665 mos7840_port->MsrLsr = 0;
666 wreg = MODEM_STATUS_REGISTER;
667 break;
668 }
669 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
670 }
671 }
672 }
673 if (!(rv < 0))
674 /* the completion handler for the control urb will resubmit */
675 return;
676 exit:
677 result = usb_submit_urb(urb, GFP_ATOMIC);
678 if (result) {
679 dev_err(&urb->dev->dev,
680 "%s - Error %d submitting interrupt urb\n",
681 __func__, result);
682 }
683 }
684
685 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
686 const char *function)
687 {
688 if (!port) {
689 pr_debug("%s - port == NULL\n", function);
690 return -1;
691 }
692 if (!port->serial) {
693 pr_debug("%s - port->serial == NULL\n", function);
694 return -1;
695 }
696
697 return 0;
698 }
699
700 /* Inline functions to check the sanity of a pointer that is passed to us */
701 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
702 const char *function)
703 {
704 if (!serial) {
705 pr_debug("%s - serial == NULL\n", function);
706 return -1;
707 }
708 if (!serial->type) {
709 pr_debug("%s - serial->type == NULL!\n", function);
710 return -1;
711 }
712
713 return 0;
714 }
715
716 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
717 const char *function)
718 {
719 /* if no port was specified, or it fails a paranoia check */
720 if (!port ||
721 mos7840_port_paranoia_check(port, function) ||
722 mos7840_serial_paranoia_check(port->serial, function)) {
723 /* then say that we don't have a valid usb_serial thing,
724 * which will end up genrating -ENODEV return values */
725 return NULL;
726 }
727
728 return port->serial;
729 }
730
731 /*****************************************************************************
732 * mos7840_bulk_in_callback
733 * this is the callback function for when we have received data on the
734 * bulk in endpoint.
735 *****************************************************************************/
736
737 static void mos7840_bulk_in_callback(struct urb *urb)
738 {
739 int retval;
740 unsigned char *data;
741 struct usb_serial *serial;
742 struct usb_serial_port *port;
743 struct moschip_port *mos7840_port;
744 int status = urb->status;
745
746 mos7840_port = urb->context;
747 if (!mos7840_port)
748 return;
749
750 if (status) {
751 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
752 mos7840_port->read_urb_busy = false;
753 return;
754 }
755
756 port = mos7840_port->port;
757 if (mos7840_port_paranoia_check(port, __func__)) {
758 mos7840_port->read_urb_busy = false;
759 return;
760 }
761
762 serial = mos7840_get_usb_serial(port, __func__);
763 if (!serial) {
764 mos7840_port->read_urb_busy = false;
765 return;
766 }
767
768 data = urb->transfer_buffer;
769 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
770
771 if (urb->actual_length) {
772 struct tty_port *tport = &mos7840_port->port->port;
773 tty_insert_flip_string(tport, data, urb->actual_length);
774 tty_flip_buffer_push(tport);
775 port->icount.rx += urb->actual_length;
776 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
777 }
778
779 if (!mos7840_port->read_urb) {
780 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
781 mos7840_port->read_urb_busy = false;
782 return;
783 }
784
785 if (mos7840_port->has_led)
786 mos7840_led_activity(port);
787
788 mos7840_port->read_urb_busy = true;
789 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
790
791 if (retval) {
792 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
793 mos7840_port->read_urb_busy = false;
794 }
795 }
796
797 /*****************************************************************************
798 * mos7840_bulk_out_data_callback
799 * this is the callback function for when we have finished sending
800 * serial data on the bulk out endpoint.
801 *****************************************************************************/
802
803 static void mos7840_bulk_out_data_callback(struct urb *urb)
804 {
805 struct moschip_port *mos7840_port;
806 struct usb_serial_port *port;
807 int status = urb->status;
808 int i;
809
810 mos7840_port = urb->context;
811 port = mos7840_port->port;
812 spin_lock(&mos7840_port->pool_lock);
813 for (i = 0; i < NUM_URBS; i++) {
814 if (urb == mos7840_port->write_urb_pool[i]) {
815 mos7840_port->busy[i] = 0;
816 break;
817 }
818 }
819 spin_unlock(&mos7840_port->pool_lock);
820
821 if (status) {
822 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
823 return;
824 }
825
826 if (mos7840_port_paranoia_check(port, __func__))
827 return;
828
829 if (mos7840_port->open)
830 tty_port_tty_wakeup(&port->port);
831
832 }
833
834 /************************************************************************/
835 /* 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 */
836 /************************************************************************/
837
838 /*****************************************************************************
839 * mos7840_open
840 * this function is called by the tty driver when a port is opened
841 * If successful, we return 0
842 * Otherwise we return a negative error number.
843 *****************************************************************************/
844
845 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
846 {
847 int response;
848 int j;
849 struct usb_serial *serial;
850 struct urb *urb;
851 __u16 Data;
852 int status;
853 struct moschip_port *mos7840_port;
854 struct moschip_port *port0;
855
856 if (mos7840_port_paranoia_check(port, __func__))
857 return -ENODEV;
858
859 serial = port->serial;
860
861 if (mos7840_serial_paranoia_check(serial, __func__))
862 return -ENODEV;
863
864 mos7840_port = mos7840_get_port_private(port);
865 port0 = mos7840_get_port_private(serial->port[0]);
866
867 if (mos7840_port == NULL || port0 == NULL)
868 return -ENODEV;
869
870 usb_clear_halt(serial->dev, port->write_urb->pipe);
871 usb_clear_halt(serial->dev, port->read_urb->pipe);
872 port0->open_ports++;
873
874 /* Initialising the write urb pool */
875 for (j = 0; j < NUM_URBS; ++j) {
876 urb = usb_alloc_urb(0, GFP_KERNEL);
877 mos7840_port->write_urb_pool[j] = urb;
878 if (!urb)
879 continue;
880
881 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
882 GFP_KERNEL);
883 if (!urb->transfer_buffer) {
884 usb_free_urb(urb);
885 mos7840_port->write_urb_pool[j] = NULL;
886 continue;
887 }
888 }
889
890 /*****************************************************************************
891 * Initialize MCS7840 -- Write Init values to corresponding Registers
892 *
893 * Register Index
894 * 1 : IER
895 * 2 : FCR
896 * 3 : LCR
897 * 4 : MCR
898 *
899 * 0x08 : SP1/2 Control Reg
900 *****************************************************************************/
901
902 /* NEED to check the following Block */
903
904 Data = 0x0;
905 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
906 if (status < 0) {
907 dev_dbg(&port->dev, "Reading Spreg failed\n");
908 goto err;
909 }
910 Data |= 0x80;
911 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
912 if (status < 0) {
913 dev_dbg(&port->dev, "writing Spreg failed\n");
914 goto err;
915 }
916
917 Data &= ~0x80;
918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
919 if (status < 0) {
920 dev_dbg(&port->dev, "writing Spreg failed\n");
921 goto err;
922 }
923 /* End of block to be checked */
924
925 Data = 0x0;
926 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
927 &Data);
928 if (status < 0) {
929 dev_dbg(&port->dev, "Reading Controlreg failed\n");
930 goto err;
931 }
932 Data |= 0x08; /* Driver done bit */
933 Data |= 0x20; /* rx_disable */
934 status = mos7840_set_reg_sync(port,
935 mos7840_port->ControlRegOffset, Data);
936 if (status < 0) {
937 dev_dbg(&port->dev, "writing Controlreg failed\n");
938 goto err;
939 }
940 /* do register settings here */
941 /* Set all regs to the device default values. */
942 /***********************************
943 * First Disable all interrupts.
944 ***********************************/
945 Data = 0x00;
946 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
947 if (status < 0) {
948 dev_dbg(&port->dev, "disabling interrupts failed\n");
949 goto err;
950 }
951 /* Set FIFO_CONTROL_REGISTER to the default value */
952 Data = 0x00;
953 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
954 if (status < 0) {
955 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
956 goto err;
957 }
958
959 Data = 0xcf;
960 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
961 if (status < 0) {
962 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
963 goto err;
964 }
965
966 Data = 0x03;
967 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
968 mos7840_port->shadowLCR = Data;
969
970 Data = 0x0b;
971 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
972 mos7840_port->shadowMCR = Data;
973
974 Data = 0x00;
975 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
976 mos7840_port->shadowLCR = Data;
977
978 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
979 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
980
981 Data = 0x0c;
982 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
983
984 Data = 0x0;
985 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
986
987 Data = 0x00;
988 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
989
990 Data = Data & ~SERIAL_LCR_DLAB;
991 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
992 mos7840_port->shadowLCR = Data;
993
994 /* clearing Bulkin and Bulkout Fifo */
995 Data = 0x0;
996 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
997
998 Data = Data | 0x0c;
999 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1000
1001 Data = Data & ~0x0c;
1002 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1003 /* Finally enable all interrupts */
1004 Data = 0x0c;
1005 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1006
1007 /* clearing rx_disable */
1008 Data = 0x0;
1009 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1010 &Data);
1011 Data = Data & ~0x20;
1012 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1013 Data);
1014
1015 /* rx_negate */
1016 Data = 0x0;
1017 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1018 &Data);
1019 Data = Data | 0x10;
1020 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1021 Data);
1022
1023 /* Check to see if we've set up our endpoint info yet *
1024 * (can't set it up in mos7840_startup as the structures *
1025 * were not set up at that time.) */
1026 if (port0->open_ports == 1) {
1027 if (serial->port[0]->interrupt_in_buffer == NULL) {
1028 /* set up interrupt urb */
1029 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1030 serial->dev,
1031 usb_rcvintpipe(serial->dev,
1032 serial->port[0]->interrupt_in_endpointAddress),
1033 serial->port[0]->interrupt_in_buffer,
1034 serial->port[0]->interrupt_in_urb->
1035 transfer_buffer_length,
1036 mos7840_interrupt_callback,
1037 serial,
1038 serial->port[0]->interrupt_in_urb->interval);
1039
1040 /* start interrupt read for mos7840 *
1041 * will continue as long as mos7840 is connected */
1042
1043 response =
1044 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1045 GFP_KERNEL);
1046 if (response) {
1047 dev_err(&port->dev, "%s - Error %d submitting "
1048 "interrupt urb\n", __func__, response);
1049 }
1050
1051 }
1052
1053 }
1054
1055 /* see if we've set up our endpoint info yet *
1056 * (can't set it up in mos7840_startup as the *
1057 * structures were not set up at that time.) */
1058
1059 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
1060 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
1061 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1062 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1063 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1064 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1065 mos7840_port->read_urb = port->read_urb;
1066
1067 /* set up our bulk in urb */
1068 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1069 usb_fill_bulk_urb(mos7840_port->read_urb,
1070 serial->dev,
1071 usb_rcvbulkpipe(serial->dev,
1072 (port->bulk_in_endpointAddress) + 2),
1073 port->bulk_in_buffer,
1074 mos7840_port->read_urb->transfer_buffer_length,
1075 mos7840_bulk_in_callback, mos7840_port);
1076 } else {
1077 usb_fill_bulk_urb(mos7840_port->read_urb,
1078 serial->dev,
1079 usb_rcvbulkpipe(serial->dev,
1080 port->bulk_in_endpointAddress),
1081 port->bulk_in_buffer,
1082 mos7840_port->read_urb->transfer_buffer_length,
1083 mos7840_bulk_in_callback, mos7840_port);
1084 }
1085
1086 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1087 mos7840_port->read_urb_busy = true;
1088 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1089 if (response) {
1090 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1091 __func__, response);
1092 mos7840_port->read_urb_busy = false;
1093 }
1094
1095 /* initialize our port settings */
1096 /* Must set to enable ints! */
1097 mos7840_port->shadowMCR = MCR_MASTER_IE;
1098 /* send a open port command */
1099 mos7840_port->open = 1;
1100 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1101
1102 return 0;
1103 err:
1104 for (j = 0; j < NUM_URBS; ++j) {
1105 urb = mos7840_port->write_urb_pool[j];
1106 if (!urb)
1107 continue;
1108 kfree(urb->transfer_buffer);
1109 usb_free_urb(urb);
1110 }
1111 return status;
1112 }
1113
1114 /*****************************************************************************
1115 * mos7840_chars_in_buffer
1116 * this function is called by the tty driver when it wants to know how many
1117 * bytes of data we currently have outstanding in the port (data that has
1118 * been written, but hasn't made it out the port yet)
1119 * If successful, we return the number of bytes left to be written in the
1120 * system,
1121 * Otherwise we return zero.
1122 *****************************************************************************/
1123
1124 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1125 {
1126 struct usb_serial_port *port = tty->driver_data;
1127 int i;
1128 int chars = 0;
1129 unsigned long flags;
1130 struct moschip_port *mos7840_port;
1131
1132 if (mos7840_port_paranoia_check(port, __func__))
1133 return 0;
1134
1135 mos7840_port = mos7840_get_port_private(port);
1136 if (mos7840_port == NULL)
1137 return 0;
1138
1139 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1140 for (i = 0; i < NUM_URBS; ++i) {
1141 if (mos7840_port->busy[i]) {
1142 struct urb *urb = mos7840_port->write_urb_pool[i];
1143 chars += urb->transfer_buffer_length;
1144 }
1145 }
1146 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1147 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1148 return chars;
1149
1150 }
1151
1152 /*****************************************************************************
1153 * mos7840_close
1154 * this function is called by the tty driver when a port is closed
1155 *****************************************************************************/
1156
1157 static void mos7840_close(struct usb_serial_port *port)
1158 {
1159 struct usb_serial *serial;
1160 struct moschip_port *mos7840_port;
1161 struct moschip_port *port0;
1162 int j;
1163 __u16 Data;
1164
1165 if (mos7840_port_paranoia_check(port, __func__))
1166 return;
1167
1168 serial = mos7840_get_usb_serial(port, __func__);
1169 if (!serial)
1170 return;
1171
1172 mos7840_port = mos7840_get_port_private(port);
1173 port0 = mos7840_get_port_private(serial->port[0]);
1174
1175 if (mos7840_port == NULL || port0 == NULL)
1176 return;
1177
1178 for (j = 0; j < NUM_URBS; ++j)
1179 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1180
1181 /* Freeing Write URBs */
1182 for (j = 0; j < NUM_URBS; ++j) {
1183 if (mos7840_port->write_urb_pool[j]) {
1184 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer);
1185 usb_free_urb(mos7840_port->write_urb_pool[j]);
1186 }
1187 }
1188
1189 usb_kill_urb(mos7840_port->write_urb);
1190 usb_kill_urb(mos7840_port->read_urb);
1191 mos7840_port->read_urb_busy = false;
1192
1193 port0->open_ports--;
1194 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
1195 if (port0->open_ports == 0) {
1196 if (serial->port[0]->interrupt_in_urb) {
1197 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1198 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1199 }
1200 }
1201
1202 if (mos7840_port->write_urb) {
1203 /* if this urb had a transfer buffer already (old tx) free it */
1204 kfree(mos7840_port->write_urb->transfer_buffer);
1205 usb_free_urb(mos7840_port->write_urb);
1206 }
1207
1208 Data = 0x0;
1209 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1210
1211 Data = 0x00;
1212 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1213
1214 mos7840_port->open = 0;
1215 }
1216
1217 /*****************************************************************************
1218 * mos7840_break
1219 * this function sends a break to the port
1220 *****************************************************************************/
1221 static void mos7840_break(struct tty_struct *tty, int break_state)
1222 {
1223 struct usb_serial_port *port = tty->driver_data;
1224 unsigned char data;
1225 struct usb_serial *serial;
1226 struct moschip_port *mos7840_port;
1227
1228 if (mos7840_port_paranoia_check(port, __func__))
1229 return;
1230
1231 serial = mos7840_get_usb_serial(port, __func__);
1232 if (!serial)
1233 return;
1234
1235 mos7840_port = mos7840_get_port_private(port);
1236
1237 if (mos7840_port == NULL)
1238 return;
1239
1240 if (break_state == -1)
1241 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1242 else
1243 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1244
1245 /* FIXME: no locking on shadowLCR anywhere in driver */
1246 mos7840_port->shadowLCR = data;
1247 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1248 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1249 mos7840_port->shadowLCR);
1250 }
1251
1252 /*****************************************************************************
1253 * mos7840_write_room
1254 * this function is called by the tty driver when it wants to know how many
1255 * bytes of data we can accept for a specific port.
1256 * If successful, we return the amount of room that we have for this port
1257 * Otherwise we return a negative error number.
1258 *****************************************************************************/
1259
1260 static int mos7840_write_room(struct tty_struct *tty)
1261 {
1262 struct usb_serial_port *port = tty->driver_data;
1263 int i;
1264 int room = 0;
1265 unsigned long flags;
1266 struct moschip_port *mos7840_port;
1267
1268 if (mos7840_port_paranoia_check(port, __func__))
1269 return -1;
1270
1271 mos7840_port = mos7840_get_port_private(port);
1272 if (mos7840_port == NULL)
1273 return -1;
1274
1275 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1276 for (i = 0; i < NUM_URBS; ++i) {
1277 if (!mos7840_port->busy[i])
1278 room += URB_TRANSFER_BUFFER_SIZE;
1279 }
1280 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1281
1282 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1283 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1284 return room;
1285
1286 }
1287
1288 /*****************************************************************************
1289 * mos7840_write
1290 * this function is called by the tty driver when data should be written to
1291 * the port.
1292 * If successful, we return the number of bytes written, otherwise we
1293 * return a negative error number.
1294 *****************************************************************************/
1295
1296 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1297 const unsigned char *data, int count)
1298 {
1299 int status;
1300 int i;
1301 int bytes_sent = 0;
1302 int transfer_size;
1303 unsigned long flags;
1304
1305 struct moschip_port *mos7840_port;
1306 struct usb_serial *serial;
1307 struct urb *urb;
1308 /* __u16 Data; */
1309 const unsigned char *current_position = data;
1310 unsigned char *data1;
1311
1312 if (mos7840_port_paranoia_check(port, __func__))
1313 return -1;
1314
1315 serial = port->serial;
1316 if (mos7840_serial_paranoia_check(serial, __func__))
1317 return -1;
1318
1319 mos7840_port = mos7840_get_port_private(port);
1320 if (mos7840_port == NULL)
1321 return -1;
1322
1323 /* try to find a free urb in the list */
1324 urb = NULL;
1325
1326 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1327 for (i = 0; i < NUM_URBS; ++i) {
1328 if (!mos7840_port->busy[i]) {
1329 mos7840_port->busy[i] = 1;
1330 urb = mos7840_port->write_urb_pool[i];
1331 dev_dbg(&port->dev, "URB:%d\n", i);
1332 break;
1333 }
1334 }
1335 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1336
1337 if (urb == NULL) {
1338 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1339 goto exit;
1340 }
1341
1342 if (urb->transfer_buffer == NULL) {
1343 urb->transfer_buffer =
1344 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1345 if (!urb->transfer_buffer)
1346 goto exit;
1347 }
1348 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1349
1350 memcpy(urb->transfer_buffer, current_position, transfer_size);
1351
1352 /* fill urb with data and submit */
1353 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1354 usb_fill_bulk_urb(urb,
1355 serial->dev,
1356 usb_sndbulkpipe(serial->dev,
1357 (port->bulk_out_endpointAddress) + 2),
1358 urb->transfer_buffer,
1359 transfer_size,
1360 mos7840_bulk_out_data_callback, mos7840_port);
1361 } else {
1362 usb_fill_bulk_urb(urb,
1363 serial->dev,
1364 usb_sndbulkpipe(serial->dev,
1365 port->bulk_out_endpointAddress),
1366 urb->transfer_buffer,
1367 transfer_size,
1368 mos7840_bulk_out_data_callback, mos7840_port);
1369 }
1370
1371 data1 = urb->transfer_buffer;
1372 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1373
1374 if (mos7840_port->has_led)
1375 mos7840_led_activity(port);
1376
1377 /* send it down the pipe */
1378 status = usb_submit_urb(urb, GFP_ATOMIC);
1379
1380 if (status) {
1381 mos7840_port->busy[i] = 0;
1382 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1383 "with status = %d\n", __func__, status);
1384 bytes_sent = status;
1385 goto exit;
1386 }
1387 bytes_sent = transfer_size;
1388 port->icount.tx += transfer_size;
1389 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
1390 exit:
1391 return bytes_sent;
1392
1393 }
1394
1395 /*****************************************************************************
1396 * mos7840_throttle
1397 * this function is called by the tty driver when it wants to stop the data
1398 * being read from the port.
1399 *****************************************************************************/
1400
1401 static void mos7840_throttle(struct tty_struct *tty)
1402 {
1403 struct usb_serial_port *port = tty->driver_data;
1404 struct moschip_port *mos7840_port;
1405 int status;
1406
1407 if (mos7840_port_paranoia_check(port, __func__))
1408 return;
1409
1410 mos7840_port = mos7840_get_port_private(port);
1411
1412 if (mos7840_port == NULL)
1413 return;
1414
1415 if (!mos7840_port->open) {
1416 dev_dbg(&port->dev, "%s", "port not opened\n");
1417 return;
1418 }
1419
1420 /* if we are implementing XON/XOFF, send the stop character */
1421 if (I_IXOFF(tty)) {
1422 unsigned char stop_char = STOP_CHAR(tty);
1423 status = mos7840_write(tty, port, &stop_char, 1);
1424 if (status <= 0)
1425 return;
1426 }
1427 /* if we are implementing RTS/CTS, toggle that line */
1428 if (C_CRTSCTS(tty)) {
1429 mos7840_port->shadowMCR &= ~MCR_RTS;
1430 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1431 mos7840_port->shadowMCR);
1432 if (status < 0)
1433 return;
1434 }
1435 }
1436
1437 /*****************************************************************************
1438 * mos7840_unthrottle
1439 * this function is called by the tty driver when it wants to resume
1440 * the data being read from the port (called after mos7840_throttle is
1441 * called)
1442 *****************************************************************************/
1443 static void mos7840_unthrottle(struct tty_struct *tty)
1444 {
1445 struct usb_serial_port *port = tty->driver_data;
1446 int status;
1447 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1448
1449 if (mos7840_port_paranoia_check(port, __func__))
1450 return;
1451
1452 if (mos7840_port == NULL)
1453 return;
1454
1455 if (!mos7840_port->open) {
1456 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1457 return;
1458 }
1459
1460 /* if we are implementing XON/XOFF, send the start character */
1461 if (I_IXOFF(tty)) {
1462 unsigned char start_char = START_CHAR(tty);
1463 status = mos7840_write(tty, port, &start_char, 1);
1464 if (status <= 0)
1465 return;
1466 }
1467
1468 /* if we are implementing RTS/CTS, toggle that line */
1469 if (C_CRTSCTS(tty)) {
1470 mos7840_port->shadowMCR |= MCR_RTS;
1471 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1472 mos7840_port->shadowMCR);
1473 if (status < 0)
1474 return;
1475 }
1476 }
1477
1478 static int mos7840_tiocmget(struct tty_struct *tty)
1479 {
1480 struct usb_serial_port *port = tty->driver_data;
1481 struct moschip_port *mos7840_port;
1482 unsigned int result;
1483 __u16 msr;
1484 __u16 mcr;
1485 int status;
1486 mos7840_port = mos7840_get_port_private(port);
1487
1488 if (mos7840_port == NULL)
1489 return -ENODEV;
1490
1491 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1492 if (status != 1)
1493 return -EIO;
1494 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1495 if (status != 1)
1496 return -EIO;
1497 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1498 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1499 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1500 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1501 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1502 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1503 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1504
1505 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1506
1507 return result;
1508 }
1509
1510 static int mos7840_tiocmset(struct tty_struct *tty,
1511 unsigned int set, unsigned int clear)
1512 {
1513 struct usb_serial_port *port = tty->driver_data;
1514 struct moschip_port *mos7840_port;
1515 unsigned int mcr;
1516 int status;
1517
1518 mos7840_port = mos7840_get_port_private(port);
1519
1520 if (mos7840_port == NULL)
1521 return -ENODEV;
1522
1523 /* FIXME: What locks the port registers ? */
1524 mcr = mos7840_port->shadowMCR;
1525 if (clear & TIOCM_RTS)
1526 mcr &= ~MCR_RTS;
1527 if (clear & TIOCM_DTR)
1528 mcr &= ~MCR_DTR;
1529 if (clear & TIOCM_LOOP)
1530 mcr &= ~MCR_LOOPBACK;
1531
1532 if (set & TIOCM_RTS)
1533 mcr |= MCR_RTS;
1534 if (set & TIOCM_DTR)
1535 mcr |= MCR_DTR;
1536 if (set & TIOCM_LOOP)
1537 mcr |= MCR_LOOPBACK;
1538
1539 mos7840_port->shadowMCR = mcr;
1540
1541 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1542 if (status < 0) {
1543 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1544 return status;
1545 }
1546
1547 return 0;
1548 }
1549
1550 /*****************************************************************************
1551 * mos7840_calc_baud_rate_divisor
1552 * this function calculates the proper baud rate divisor for the specified
1553 * baud rate.
1554 *****************************************************************************/
1555 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1556 int baudRate, int *divisor,
1557 __u16 *clk_sel_val)
1558 {
1559 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1560
1561 if (baudRate <= 115200) {
1562 *divisor = 115200 / baudRate;
1563 *clk_sel_val = 0x0;
1564 }
1565 if ((baudRate > 115200) && (baudRate <= 230400)) {
1566 *divisor = 230400 / baudRate;
1567 *clk_sel_val = 0x10;
1568 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1569 *divisor = 403200 / baudRate;
1570 *clk_sel_val = 0x20;
1571 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1572 *divisor = 460800 / baudRate;
1573 *clk_sel_val = 0x30;
1574 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1575 *divisor = 806400 / baudRate;
1576 *clk_sel_val = 0x40;
1577 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1578 *divisor = 921600 / baudRate;
1579 *clk_sel_val = 0x50;
1580 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1581 *divisor = 1572864 / baudRate;
1582 *clk_sel_val = 0x60;
1583 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1584 *divisor = 3145728 / baudRate;
1585 *clk_sel_val = 0x70;
1586 }
1587 return 0;
1588 }
1589
1590 /*****************************************************************************
1591 * mos7840_send_cmd_write_baud_rate
1592 * this function sends the proper command to change the baud rate of the
1593 * specified port.
1594 *****************************************************************************/
1595
1596 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1597 int baudRate)
1598 {
1599 int divisor = 0;
1600 int status;
1601 __u16 Data;
1602 unsigned char number;
1603 __u16 clk_sel_val;
1604 struct usb_serial_port *port;
1605
1606 if (mos7840_port == NULL)
1607 return -1;
1608
1609 port = mos7840_port->port;
1610 if (mos7840_port_paranoia_check(port, __func__))
1611 return -1;
1612
1613 if (mos7840_serial_paranoia_check(port->serial, __func__))
1614 return -1;
1615
1616 number = mos7840_port->port->port_number;
1617
1618 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1619 /* reset clk_uart_sel in spregOffset */
1620 if (baudRate > 115200) {
1621 #ifdef HW_flow_control
1622 /* NOTE: need to see the pther register to modify */
1623 /* setting h/w flow control bit to 1 */
1624 Data = 0x2b;
1625 mos7840_port->shadowMCR = Data;
1626 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1627 Data);
1628 if (status < 0) {
1629 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1630 return -1;
1631 }
1632 #endif
1633
1634 } else {
1635 #ifdef HW_flow_control
1636 /* setting h/w flow control bit to 0 */
1637 Data = 0xb;
1638 mos7840_port->shadowMCR = Data;
1639 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1640 Data);
1641 if (status < 0) {
1642 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1643 return -1;
1644 }
1645 #endif
1646
1647 }
1648
1649 if (1) { /* baudRate <= 115200) */
1650 clk_sel_val = 0x0;
1651 Data = 0x0;
1652 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1653 &clk_sel_val);
1654 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1655 &Data);
1656 if (status < 0) {
1657 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1658 return -1;
1659 }
1660 Data = (Data & 0x8f) | clk_sel_val;
1661 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1662 Data);
1663 if (status < 0) {
1664 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1665 return -1;
1666 }
1667 /* Calculate the Divisor */
1668
1669 if (status) {
1670 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1671 return status;
1672 }
1673 /* Enable access to divisor latch */
1674 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1675 mos7840_port->shadowLCR = Data;
1676 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1677
1678 /* Write the divisor */
1679 Data = (unsigned char)(divisor & 0xff);
1680 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1681 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1682
1683 Data = (unsigned char)((divisor & 0xff00) >> 8);
1684 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1685 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1686
1687 /* Disable access to divisor latch */
1688 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1689 mos7840_port->shadowLCR = Data;
1690 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1691
1692 }
1693 return status;
1694 }
1695
1696 /*****************************************************************************
1697 * mos7840_change_port_settings
1698 * This routine is called to set the UART on the device to match
1699 * the specified new settings.
1700 *****************************************************************************/
1701
1702 static void mos7840_change_port_settings(struct tty_struct *tty,
1703 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1704 {
1705 int baud;
1706 unsigned cflag;
1707 unsigned iflag;
1708 __u8 lData;
1709 __u8 lParity;
1710 __u8 lStop;
1711 int status;
1712 __u16 Data;
1713 struct usb_serial_port *port;
1714 struct usb_serial *serial;
1715
1716 if (mos7840_port == NULL)
1717 return;
1718
1719 port = mos7840_port->port;
1720
1721 if (mos7840_port_paranoia_check(port, __func__))
1722 return;
1723
1724 if (mos7840_serial_paranoia_check(port->serial, __func__))
1725 return;
1726
1727 serial = port->serial;
1728
1729 if (!mos7840_port->open) {
1730 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1731 return;
1732 }
1733
1734 lData = LCR_BITS_8;
1735 lStop = LCR_STOP_1;
1736 lParity = LCR_PAR_NONE;
1737
1738 cflag = tty->termios.c_cflag;
1739 iflag = tty->termios.c_iflag;
1740
1741 /* Change the number of bits */
1742 switch (cflag & CSIZE) {
1743 case CS5:
1744 lData = LCR_BITS_5;
1745 break;
1746
1747 case CS6:
1748 lData = LCR_BITS_6;
1749 break;
1750
1751 case CS7:
1752 lData = LCR_BITS_7;
1753 break;
1754
1755 default:
1756 case CS8:
1757 lData = LCR_BITS_8;
1758 break;
1759 }
1760
1761 /* Change the Parity bit */
1762 if (cflag & PARENB) {
1763 if (cflag & PARODD) {
1764 lParity = LCR_PAR_ODD;
1765 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1766 } else {
1767 lParity = LCR_PAR_EVEN;
1768 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1769 }
1770
1771 } else {
1772 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1773 }
1774
1775 if (cflag & CMSPAR)
1776 lParity = lParity | 0x20;
1777
1778 /* Change the Stop bit */
1779 if (cflag & CSTOPB) {
1780 lStop = LCR_STOP_2;
1781 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1782 } else {
1783 lStop = LCR_STOP_1;
1784 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1785 }
1786
1787 /* Update the LCR with the correct value */
1788 mos7840_port->shadowLCR &=
1789 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1790 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1791
1792 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1793 mos7840_port->shadowLCR);
1794 /* Disable Interrupts */
1795 Data = 0x00;
1796 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1797
1798 Data = 0x00;
1799 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1800
1801 Data = 0xcf;
1802 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1803
1804 /* Send the updated LCR value to the mos7840 */
1805 Data = mos7840_port->shadowLCR;
1806
1807 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1808
1809 Data = 0x00b;
1810 mos7840_port->shadowMCR = Data;
1811 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1812 Data = 0x00b;
1813 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1814
1815 /* set up the MCR register and send it to the mos7840 */
1816
1817 mos7840_port->shadowMCR = MCR_MASTER_IE;
1818 if (cflag & CBAUD)
1819 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1820
1821 if (cflag & CRTSCTS)
1822 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1823 else
1824 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1825
1826 Data = mos7840_port->shadowMCR;
1827 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1828
1829 /* Determine divisor based on baud rate */
1830 baud = tty_get_baud_rate(tty);
1831
1832 if (!baud) {
1833 /* pick a default, any default... */
1834 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1835 baud = 9600;
1836 }
1837
1838 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1839 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1840
1841 /* Enable Interrupts */
1842 Data = 0x0c;
1843 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1844
1845 if (!mos7840_port->read_urb_busy) {
1846 mos7840_port->read_urb_busy = true;
1847 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1848 if (status) {
1849 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1850 status);
1851 mos7840_port->read_urb_busy = false;
1852 }
1853 }
1854 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1855 mos7840_port->shadowLCR);
1856 }
1857
1858 /*****************************************************************************
1859 * mos7840_set_termios
1860 * this function is called by the tty driver when it wants to change
1861 * the termios structure
1862 *****************************************************************************/
1863
1864 static void mos7840_set_termios(struct tty_struct *tty,
1865 struct usb_serial_port *port,
1866 struct ktermios *old_termios)
1867 {
1868 int status;
1869 unsigned int cflag;
1870 struct usb_serial *serial;
1871 struct moschip_port *mos7840_port;
1872
1873 if (mos7840_port_paranoia_check(port, __func__))
1874 return;
1875
1876 serial = port->serial;
1877
1878 if (mos7840_serial_paranoia_check(serial, __func__))
1879 return;
1880
1881 mos7840_port = mos7840_get_port_private(port);
1882
1883 if (mos7840_port == NULL)
1884 return;
1885
1886 if (!mos7840_port->open) {
1887 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1888 return;
1889 }
1890
1891 dev_dbg(&port->dev, "%s", "setting termios - \n");
1892
1893 cflag = tty->termios.c_cflag;
1894
1895 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
1896 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
1897 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
1898 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
1899
1900 /* change the port settings to the new ones specified */
1901
1902 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1903
1904 if (!mos7840_port->read_urb) {
1905 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
1906 return;
1907 }
1908
1909 if (!mos7840_port->read_urb_busy) {
1910 mos7840_port->read_urb_busy = true;
1911 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1912 if (status) {
1913 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1914 status);
1915 mos7840_port->read_urb_busy = false;
1916 }
1917 }
1918 }
1919
1920 /*****************************************************************************
1921 * mos7840_get_lsr_info - get line status register info
1922 *
1923 * Purpose: Let user call ioctl() to get info when the UART physically
1924 * is emptied. On bus types like RS485, the transmitter must
1925 * release the bus after transmitting. This must be done when
1926 * the transmit shift register is empty, not be done when the
1927 * transmit holding register is empty. This functionality
1928 * allows an RS485 driver to be written in user space.
1929 *****************************************************************************/
1930
1931 static int mos7840_get_lsr_info(struct tty_struct *tty,
1932 unsigned int __user *value)
1933 {
1934 int count;
1935 unsigned int result = 0;
1936
1937 count = mos7840_chars_in_buffer(tty);
1938 if (count == 0)
1939 result = TIOCSER_TEMT;
1940
1941 if (copy_to_user(value, &result, sizeof(int)))
1942 return -EFAULT;
1943 return 0;
1944 }
1945
1946 /*****************************************************************************
1947 * mos7840_get_serial_info
1948 * function to get information about serial port
1949 *****************************************************************************/
1950
1951 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
1952 struct serial_struct __user *retinfo)
1953 {
1954 struct serial_struct tmp;
1955
1956 if (mos7840_port == NULL)
1957 return -1;
1958
1959 if (!retinfo)
1960 return -EFAULT;
1961
1962 memset(&tmp, 0, sizeof(tmp));
1963
1964 tmp.type = PORT_16550A;
1965 tmp.line = mos7840_port->port->minor;
1966 tmp.port = mos7840_port->port->port_number;
1967 tmp.irq = 0;
1968 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1969 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
1970 tmp.baud_base = 9600;
1971 tmp.close_delay = 5 * HZ;
1972 tmp.closing_wait = 30 * HZ;
1973
1974 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1975 return -EFAULT;
1976 return 0;
1977 }
1978
1979 /*****************************************************************************
1980 * SerialIoctl
1981 * this function handles any ioctl calls to the driver
1982 *****************************************************************************/
1983
1984 static int mos7840_ioctl(struct tty_struct *tty,
1985 unsigned int cmd, unsigned long arg)
1986 {
1987 struct usb_serial_port *port = tty->driver_data;
1988 void __user *argp = (void __user *)arg;
1989 struct moschip_port *mos7840_port;
1990
1991 if (mos7840_port_paranoia_check(port, __func__))
1992 return -1;
1993
1994 mos7840_port = mos7840_get_port_private(port);
1995
1996 if (mos7840_port == NULL)
1997 return -1;
1998
1999 switch (cmd) {
2000 /* return number of bytes available */
2001
2002 case TIOCSERGETLSR:
2003 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2004 return mos7840_get_lsr_info(tty, argp);
2005
2006 case TIOCGSERIAL:
2007 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2008 return mos7840_get_serial_info(mos7840_port, argp);
2009
2010 case TIOCSSERIAL:
2011 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2012 break;
2013 default:
2014 break;
2015 }
2016 return -ENOIOCTLCMD;
2017 }
2018
2019 static int mos7810_check(struct usb_serial *serial)
2020 {
2021 int i, pass_count = 0;
2022 u8 *buf;
2023 __u16 data = 0, mcr_data = 0;
2024 __u16 test_pattern = 0x55AA;
2025 int res;
2026
2027 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2028 if (!buf)
2029 return 0; /* failed to identify 7810 */
2030
2031 /* Store MCR setting */
2032 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2033 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2034 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2035 if (res == VENDOR_READ_LENGTH)
2036 mcr_data = *buf;
2037
2038 for (i = 0; i < 16; i++) {
2039 /* Send the 1-bit test pattern out to MCS7810 test pin */
2040 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2041 MCS_WRREQ, MCS_WR_RTYPE,
2042 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2043 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2044
2045 /* Read the test pattern back */
2046 res = usb_control_msg(serial->dev,
2047 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2048 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2049 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2050 if (res == VENDOR_READ_LENGTH)
2051 data = *buf;
2052
2053 /* If this is a MCS7810 device, both test patterns must match */
2054 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2055 break;
2056
2057 pass_count++;
2058 }
2059
2060 /* Restore MCR setting */
2061 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2062 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2063 0, MOS_WDR_TIMEOUT);
2064
2065 kfree(buf);
2066
2067 if (pass_count == 16)
2068 return 1;
2069
2070 return 0;
2071 }
2072
2073 static int mos7840_probe(struct usb_serial *serial,
2074 const struct usb_device_id *id)
2075 {
2076 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
2077 u8 *buf;
2078 int device_type;
2079
2080 if (product == MOSCHIP_DEVICE_ID_7810 ||
2081 product == MOSCHIP_DEVICE_ID_7820) {
2082 device_type = product;
2083 goto out;
2084 }
2085
2086 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2087 if (!buf)
2088 return -ENOMEM;
2089
2090 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2091 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2092 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2093
2094 /* For a MCS7840 device GPIO0 must be set to 1 */
2095 if (buf[0] & 0x01)
2096 device_type = MOSCHIP_DEVICE_ID_7840;
2097 else if (mos7810_check(serial))
2098 device_type = MOSCHIP_DEVICE_ID_7810;
2099 else
2100 device_type = MOSCHIP_DEVICE_ID_7820;
2101
2102 kfree(buf);
2103 out:
2104 usb_set_serial_data(serial, (void *)(unsigned long)device_type);
2105
2106 return 0;
2107 }
2108
2109 static int mos7840_calc_num_ports(struct usb_serial *serial)
2110 {
2111 int device_type = (unsigned long)usb_get_serial_data(serial);
2112 int mos7840_num_ports;
2113
2114 mos7840_num_ports = (device_type >> 4) & 0x000F;
2115
2116 return mos7840_num_ports;
2117 }
2118
2119 static int mos7840_port_probe(struct usb_serial_port *port)
2120 {
2121 struct usb_serial *serial = port->serial;
2122 int device_type = (unsigned long)usb_get_serial_data(serial);
2123 struct moschip_port *mos7840_port;
2124 int status;
2125 int pnum;
2126 __u16 Data;
2127
2128 /* we set up the pointers to the endpoints in the mos7840_open *
2129 * function, as the structures aren't created yet. */
2130
2131 pnum = port->port_number;
2132
2133 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2134 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2135 if (!mos7840_port)
2136 return -ENOMEM;
2137
2138 /* Initialize all port interrupt end point to port 0 int
2139 * endpoint. Our device has only one interrupt end point
2140 * common to all port */
2141
2142 mos7840_port->port = port;
2143 mos7840_set_port_private(port, mos7840_port);
2144 spin_lock_init(&mos7840_port->pool_lock);
2145
2146 /* minor is not initialised until later by
2147 * usb-serial.c:get_free_serial() and cannot therefore be used
2148 * to index device instances */
2149 mos7840_port->port_num = pnum + 1;
2150 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
2151 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2152
2153 if (mos7840_port->port_num == 1) {
2154 mos7840_port->SpRegOffset = 0x0;
2155 mos7840_port->ControlRegOffset = 0x1;
2156 mos7840_port->DcrRegOffset = 0x4;
2157 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2158 mos7840_port->SpRegOffset = 0x8;
2159 mos7840_port->ControlRegOffset = 0x9;
2160 mos7840_port->DcrRegOffset = 0x16;
2161 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2162 mos7840_port->SpRegOffset = 0xa;
2163 mos7840_port->ControlRegOffset = 0xb;
2164 mos7840_port->DcrRegOffset = 0x19;
2165 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2166 mos7840_port->SpRegOffset = 0xa;
2167 mos7840_port->ControlRegOffset = 0xb;
2168 mos7840_port->DcrRegOffset = 0x19;
2169 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2170 mos7840_port->SpRegOffset = 0xc;
2171 mos7840_port->ControlRegOffset = 0xd;
2172 mos7840_port->DcrRegOffset = 0x1c;
2173 }
2174 mos7840_dump_serial_port(port, mos7840_port);
2175 mos7840_set_port_private(port, mos7840_port);
2176
2177 /* enable rx_disable bit in control register */
2178 status = mos7840_get_reg_sync(port,
2179 mos7840_port->ControlRegOffset, &Data);
2180 if (status < 0) {
2181 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2182 goto out;
2183 } else
2184 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2185 Data |= 0x08; /* setting driver done bit */
2186 Data |= 0x04; /* sp1_bit to have cts change reflect in
2187 modem status reg */
2188
2189 /* Data |= 0x20; //rx_disable bit */
2190 status = mos7840_set_reg_sync(port,
2191 mos7840_port->ControlRegOffset, Data);
2192 if (status < 0) {
2193 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2194 goto out;
2195 } else
2196 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2197
2198 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2199 and 0x24 in DCR3 */
2200 Data = 0x01;
2201 status = mos7840_set_reg_sync(port,
2202 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2203 if (status < 0) {
2204 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2205 goto out;
2206 } else
2207 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2208
2209 Data = 0x05;
2210 status = mos7840_set_reg_sync(port,
2211 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2212 if (status < 0) {
2213 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2214 goto out;
2215 } else
2216 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2217
2218 Data = 0x24;
2219 status = mos7840_set_reg_sync(port,
2220 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2221 if (status < 0) {
2222 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2223 goto out;
2224 } else
2225 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2226
2227 /* write values in clkstart0x0 and clkmulti 0x20 */
2228 Data = 0x0;
2229 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2230 if (status < 0) {
2231 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2232 goto out;
2233 } else
2234 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2235
2236 Data = 0x20;
2237 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2238 if (status < 0) {
2239 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2240 goto error;
2241 } else
2242 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2243
2244 /* write value 0x0 to scratchpad register */
2245 Data = 0x00;
2246 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2247 if (status < 0) {
2248 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2249 goto out;
2250 } else
2251 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2252
2253 /* Zero Length flag register */
2254 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2255 Data = 0xff;
2256 status = mos7840_set_reg_sync(port,
2257 (__u16) (ZLP_REG1 +
2258 ((__u16)mos7840_port->port_num)), Data);
2259 dev_dbg(&port->dev, "ZLIP offset %x\n",
2260 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2261 if (status < 0) {
2262 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2263 goto out;
2264 } else
2265 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2266 } else {
2267 Data = 0xff;
2268 status = mos7840_set_reg_sync(port,
2269 (__u16) (ZLP_REG1 +
2270 ((__u16)mos7840_port->port_num) - 0x1), Data);
2271 dev_dbg(&port->dev, "ZLIP offset %x\n",
2272 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2273 if (status < 0) {
2274 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2275 goto out;
2276 } else
2277 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2278
2279 }
2280 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2281 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2282 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2283 GFP_KERNEL);
2284 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2285 !mos7840_port->dr) {
2286 status = -ENOMEM;
2287 goto error;
2288 }
2289
2290 mos7840_port->has_led = false;
2291
2292 /* Initialize LED timers */
2293 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2294 mos7840_port->has_led = true;
2295
2296 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2297 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2298 GFP_KERNEL);
2299 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2300 status = -ENOMEM;
2301 goto error;
2302 }
2303
2304 setup_timer(&mos7840_port->led_timer1, mos7840_led_off,
2305 (unsigned long)mos7840_port);
2306 mos7840_port->led_timer1.expires =
2307 jiffies + msecs_to_jiffies(LED_ON_MS);
2308 setup_timer(&mos7840_port->led_timer2, mos7840_led_flag_off,
2309 (unsigned long)mos7840_port);
2310 mos7840_port->led_timer2.expires =
2311 jiffies + msecs_to_jiffies(LED_OFF_MS);
2312
2313 /* Turn off LED */
2314 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2315 }
2316 out:
2317 if (pnum == serial->num_ports - 1) {
2318 /* Zero Length flag enable */
2319 Data = 0x0f;
2320 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2321 if (status < 0) {
2322 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2323 goto error;
2324 } else
2325 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2326
2327 /* setting configuration feature to one */
2328 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2329 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2330 MOS_WDR_TIMEOUT);
2331 }
2332 return 0;
2333 error:
2334 kfree(mos7840_port->led_dr);
2335 usb_free_urb(mos7840_port->led_urb);
2336 kfree(mos7840_port->dr);
2337 kfree(mos7840_port->ctrl_buf);
2338 usb_free_urb(mos7840_port->control_urb);
2339 kfree(mos7840_port);
2340
2341 return status;
2342 }
2343
2344 static int mos7840_port_remove(struct usb_serial_port *port)
2345 {
2346 struct moschip_port *mos7840_port;
2347
2348 mos7840_port = mos7840_get_port_private(port);
2349
2350 if (mos7840_port->has_led) {
2351 /* Turn off LED */
2352 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2353
2354 del_timer_sync(&mos7840_port->led_timer1);
2355 del_timer_sync(&mos7840_port->led_timer2);
2356
2357 usb_kill_urb(mos7840_port->led_urb);
2358 usb_free_urb(mos7840_port->led_urb);
2359 kfree(mos7840_port->led_dr);
2360 }
2361 usb_kill_urb(mos7840_port->control_urb);
2362 usb_free_urb(mos7840_port->control_urb);
2363 kfree(mos7840_port->ctrl_buf);
2364 kfree(mos7840_port->dr);
2365 kfree(mos7840_port);
2366
2367 return 0;
2368 }
2369
2370 static struct usb_serial_driver moschip7840_4port_device = {
2371 .driver = {
2372 .owner = THIS_MODULE,
2373 .name = "mos7840",
2374 },
2375 .description = DRIVER_DESC,
2376 .id_table = id_table,
2377 .num_ports = 4,
2378 .open = mos7840_open,
2379 .close = mos7840_close,
2380 .write = mos7840_write,
2381 .write_room = mos7840_write_room,
2382 .chars_in_buffer = mos7840_chars_in_buffer,
2383 .throttle = mos7840_throttle,
2384 .unthrottle = mos7840_unthrottle,
2385 .calc_num_ports = mos7840_calc_num_ports,
2386 .probe = mos7840_probe,
2387 .ioctl = mos7840_ioctl,
2388 .set_termios = mos7840_set_termios,
2389 .break_ctl = mos7840_break,
2390 .tiocmget = mos7840_tiocmget,
2391 .tiocmset = mos7840_tiocmset,
2392 .tiocmiwait = usb_serial_generic_tiocmiwait,
2393 .get_icount = usb_serial_generic_get_icount,
2394 .port_probe = mos7840_port_probe,
2395 .port_remove = mos7840_port_remove,
2396 .read_bulk_callback = mos7840_bulk_in_callback,
2397 .read_int_callback = mos7840_interrupt_callback,
2398 };
2399
2400 static struct usb_serial_driver * const serial_drivers[] = {
2401 &moschip7840_4port_device, NULL
2402 };
2403
2404 module_usb_serial_driver(serial_drivers, id_table);
2405
2406 MODULE_DESCRIPTION(DRIVER_DESC);
2407 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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