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
mos7840_set_reg_sync(struct usb_serial_port * port,__u16 reg,__u16 val)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
mos7840_get_reg_sync(struct usb_serial_port * port,__u16 reg,__u16 * val)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 if (ret < VENDOR_READ_LENGTH) {
289 if (ret >= 0)
290 ret = -EIO;
291 goto out;
292 }
293
294 *val = buf[0];
295 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
296 out:
297 kfree(buf);
298 return ret;
299 }
300
301 /*
302 * mos7840_set_uart_reg
303 * To set the Uart register by calling usb_fill_control_urb function by
304 * passing usb_sndctrlpipe function as parameter.
305 */
306
mos7840_set_uart_reg(struct usb_serial_port * port,__u16 reg,__u16 val)307 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
308 __u16 val)
309 {
310
311 struct usb_device *dev = port->serial->dev;
312 val = val & 0x00ff;
313 /* For the UART control registers, the application number need
314 to be Or'ed */
315 if (port->serial->num_ports == 4) {
316 val |= ((__u16)port->port_number + 1) << 8;
317 } else {
318 if (port->port_number == 0) {
319 val |= ((__u16)port->port_number + 1) << 8;
320 } else {
321 val |= ((__u16)port->port_number + 2) << 8;
322 }
323 }
324 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
325 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
326 MCS_WR_RTYPE, val, reg, NULL, 0,
327 MOS_WDR_TIMEOUT);
328
329 }
330
331 /*
332 * mos7840_get_uart_reg
333 * To set the Control register by calling usb_fill_control_urb function
334 * by passing usb_rcvctrlpipe function as parameter.
335 */
mos7840_get_uart_reg(struct usb_serial_port * port,__u16 reg,__u16 * val)336 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
337 __u16 *val)
338 {
339 struct usb_device *dev = port->serial->dev;
340 int ret = 0;
341 __u16 Wval;
342 u8 *buf;
343
344 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
345 if (!buf)
346 return -ENOMEM;
347
348 /* Wval is same as application number */
349 if (port->serial->num_ports == 4) {
350 Wval = ((__u16)port->port_number + 1) << 8;
351 } else {
352 if (port->port_number == 0) {
353 Wval = ((__u16)port->port_number + 1) << 8;
354 } else {
355 Wval = ((__u16)port->port_number + 2) << 8;
356 }
357 }
358 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
359 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
360 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
361 MOS_WDR_TIMEOUT);
362 if (ret < VENDOR_READ_LENGTH) {
363 if (ret >= 0)
364 ret = -EIO;
365 goto out;
366 }
367 *val = buf[0];
368 out:
369 kfree(buf);
370 return ret;
371 }
372
mos7840_dump_serial_port(struct usb_serial_port * port,struct moschip_port * mos7840_port)373 static void mos7840_dump_serial_port(struct usb_serial_port *port,
374 struct moschip_port *mos7840_port)
375 {
376
377 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
378 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
379 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
380
381 }
382
383 /************************************************************************/
384 /************************************************************************/
385 /* I N T E R F A C E F U N C T I O N S */
386 /* I N T E R F A C E F U N C T I O N S */
387 /************************************************************************/
388 /************************************************************************/
389
mos7840_set_port_private(struct usb_serial_port * port,struct moschip_port * data)390 static inline void mos7840_set_port_private(struct usb_serial_port *port,
391 struct moschip_port *data)
392 {
393 usb_set_serial_port_data(port, (void *)data);
394 }
395
mos7840_get_port_private(struct usb_serial_port * port)396 static inline struct moschip_port *mos7840_get_port_private(struct
397 usb_serial_port
398 *port)
399 {
400 return (struct moschip_port *)usb_get_serial_port_data(port);
401 }
402
mos7840_handle_new_msr(struct moschip_port * port,__u8 new_msr)403 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
404 {
405 struct moschip_port *mos7840_port;
406 struct async_icount *icount;
407 mos7840_port = port;
408 if (new_msr &
409 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
410 MOS_MSR_DELTA_CD)) {
411 icount = &mos7840_port->port->icount;
412
413 /* update input line counters */
414 if (new_msr & MOS_MSR_DELTA_CTS)
415 icount->cts++;
416 if (new_msr & MOS_MSR_DELTA_DSR)
417 icount->dsr++;
418 if (new_msr & MOS_MSR_DELTA_CD)
419 icount->dcd++;
420 if (new_msr & MOS_MSR_DELTA_RI)
421 icount->rng++;
422
423 wake_up_interruptible(&port->port->port.delta_msr_wait);
424 }
425 }
426
mos7840_handle_new_lsr(struct moschip_port * port,__u8 new_lsr)427 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
428 {
429 struct async_icount *icount;
430
431 if (new_lsr & SERIAL_LSR_BI) {
432 /*
433 * Parity and Framing errors only count if they
434 * occur exclusive of a break being
435 * received.
436 */
437 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
438 }
439
440 /* update input line counters */
441 icount = &port->port->icount;
442 if (new_lsr & SERIAL_LSR_BI)
443 icount->brk++;
444 if (new_lsr & SERIAL_LSR_OE)
445 icount->overrun++;
446 if (new_lsr & SERIAL_LSR_PE)
447 icount->parity++;
448 if (new_lsr & SERIAL_LSR_FE)
449 icount->frame++;
450 }
451
452 /************************************************************************/
453 /************************************************************************/
454 /* U S B C A L L B A C K F U N C T I O N S */
455 /* U S B C A L L B A C K F U N C T I O N S */
456 /************************************************************************/
457 /************************************************************************/
458
mos7840_control_callback(struct urb * urb)459 static void mos7840_control_callback(struct urb *urb)
460 {
461 unsigned char *data;
462 struct moschip_port *mos7840_port;
463 struct device *dev = &urb->dev->dev;
464 __u8 regval = 0x0;
465 int status = urb->status;
466
467 mos7840_port = urb->context;
468
469 switch (status) {
470 case 0:
471 /* success */
472 break;
473 case -ECONNRESET:
474 case -ENOENT:
475 case -ESHUTDOWN:
476 /* this urb is terminated, clean up */
477 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
478 goto out;
479 default:
480 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
481 goto out;
482 }
483
484 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
485 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
486 mos7840_port->MsrLsr, mos7840_port->port_num);
487 data = urb->transfer_buffer;
488 regval = (__u8) data[0];
489 dev_dbg(dev, "%s data is %x\n", __func__, regval);
490 if (mos7840_port->MsrLsr == 0)
491 mos7840_handle_new_msr(mos7840_port, regval);
492 else if (mos7840_port->MsrLsr == 1)
493 mos7840_handle_new_lsr(mos7840_port, regval);
494 out:
495 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
496 }
497
mos7840_get_reg(struct moschip_port * mcs,__u16 Wval,__u16 reg,__u16 * val)498 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
499 __u16 *val)
500 {
501 struct usb_device *dev = mcs->port->serial->dev;
502 struct usb_ctrlrequest *dr = mcs->dr;
503 unsigned char *buffer = mcs->ctrl_buf;
504 int ret;
505
506 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
507 return -EBUSY;
508
509 dr->bRequestType = MCS_RD_RTYPE;
510 dr->bRequest = MCS_RDREQ;
511 dr->wValue = cpu_to_le16(Wval); /* 0 */
512 dr->wIndex = cpu_to_le16(reg);
513 dr->wLength = cpu_to_le16(2);
514
515 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
516 (unsigned char *)dr, buffer, 2,
517 mos7840_control_callback, mcs);
518 mcs->control_urb->transfer_buffer_length = 2;
519 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
520 if (ret)
521 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
522
523 return ret;
524 }
525
mos7840_set_led_callback(struct urb * urb)526 static void mos7840_set_led_callback(struct urb *urb)
527 {
528 switch (urb->status) {
529 case 0:
530 /* Success */
531 break;
532 case -ECONNRESET:
533 case -ENOENT:
534 case -ESHUTDOWN:
535 /* This urb is terminated, clean up */
536 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n",
537 __func__, urb->status);
538 break;
539 default:
540 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n",
541 __func__, urb->status);
542 }
543 }
544
mos7840_set_led_async(struct moschip_port * mcs,__u16 wval,__u16 reg)545 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
546 __u16 reg)
547 {
548 struct usb_device *dev = mcs->port->serial->dev;
549 struct usb_ctrlrequest *dr = mcs->led_dr;
550
551 dr->bRequestType = MCS_WR_RTYPE;
552 dr->bRequest = MCS_WRREQ;
553 dr->wValue = cpu_to_le16(wval);
554 dr->wIndex = cpu_to_le16(reg);
555 dr->wLength = cpu_to_le16(0);
556
557 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
558 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
559
560 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
561 }
562
mos7840_set_led_sync(struct usb_serial_port * port,__u16 reg,__u16 val)563 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
564 __u16 val)
565 {
566 struct usb_device *dev = port->serial->dev;
567
568 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
569 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
570 }
571
mos7840_led_off(unsigned long arg)572 static void mos7840_led_off(unsigned long arg)
573 {
574 struct moschip_port *mcs = (struct moschip_port *) arg;
575
576 /* Turn off LED */
577 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
578 mod_timer(&mcs->led_timer2,
579 jiffies + msecs_to_jiffies(LED_OFF_MS));
580 }
581
mos7840_led_flag_off(unsigned long arg)582 static void mos7840_led_flag_off(unsigned long arg)
583 {
584 struct moschip_port *mcs = (struct moschip_port *) arg;
585
586 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
587 }
588
mos7840_led_activity(struct usb_serial_port * port)589 static void mos7840_led_activity(struct usb_serial_port *port)
590 {
591 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
592
593 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
594 return;
595
596 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
597 mod_timer(&mos7840_port->led_timer1,
598 jiffies + msecs_to_jiffies(LED_ON_MS));
599 }
600
601 /*****************************************************************************
602 * mos7840_interrupt_callback
603 * this is the callback function for when we have received data on the
604 * interrupt endpoint.
605 *****************************************************************************/
606
mos7840_interrupt_callback(struct urb * urb)607 static void mos7840_interrupt_callback(struct urb *urb)
608 {
609 int result;
610 int length;
611 struct moschip_port *mos7840_port;
612 struct usb_serial *serial;
613 __u16 Data;
614 unsigned char *data;
615 __u8 sp[5], st;
616 int i, rv = 0;
617 __u16 wval, wreg = 0;
618 int status = urb->status;
619
620 switch (status) {
621 case 0:
622 /* success */
623 break;
624 case -ECONNRESET:
625 case -ENOENT:
626 case -ESHUTDOWN:
627 /* this urb is terminated, clean up */
628 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
629 __func__, status);
630 return;
631 default:
632 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
633 __func__, status);
634 goto exit;
635 }
636
637 length = urb->actual_length;
638 data = urb->transfer_buffer;
639
640 serial = urb->context;
641
642 /* Moschip get 5 bytes
643 * Byte 1 IIR Port 1 (port.number is 0)
644 * Byte 2 IIR Port 2 (port.number is 1)
645 * Byte 3 IIR Port 3 (port.number is 2)
646 * Byte 4 IIR Port 4 (port.number is 3)
647 * Byte 5 FIFO status for both */
648
649 if (length && length > 5) {
650 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
651 return;
652 }
653
654 sp[0] = (__u8) data[0];
655 sp[1] = (__u8) data[1];
656 sp[2] = (__u8) data[2];
657 sp[3] = (__u8) data[3];
658 st = (__u8) data[4];
659
660 for (i = 0; i < serial->num_ports; i++) {
661 mos7840_port = mos7840_get_port_private(serial->port[i]);
662 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
663 if (mos7840_port->open) {
664 if (sp[i] & 0x01) {
665 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
666 } else {
667 switch (sp[i] & 0x0f) {
668 case SERIAL_IIR_RLS:
669 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
670 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
671 mos7840_port->MsrLsr = 1;
672 wreg = LINE_STATUS_REGISTER;
673 break;
674 case SERIAL_IIR_MS:
675 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
676 mos7840_port->MsrLsr = 0;
677 wreg = MODEM_STATUS_REGISTER;
678 break;
679 }
680 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
681 }
682 }
683 }
684 if (!(rv < 0))
685 /* the completion handler for the control urb will resubmit */
686 return;
687 exit:
688 result = usb_submit_urb(urb, GFP_ATOMIC);
689 if (result) {
690 dev_err(&urb->dev->dev,
691 "%s - Error %d submitting interrupt urb\n",
692 __func__, result);
693 }
694 }
695
mos7840_port_paranoia_check(struct usb_serial_port * port,const char * function)696 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
697 const char *function)
698 {
699 if (!port) {
700 pr_debug("%s - port == NULL\n", function);
701 return -1;
702 }
703 if (!port->serial) {
704 pr_debug("%s - port->serial == NULL\n", function);
705 return -1;
706 }
707
708 return 0;
709 }
710
711 /* Inline functions to check the sanity of a pointer that is passed to us */
mos7840_serial_paranoia_check(struct usb_serial * serial,const char * function)712 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
713 const char *function)
714 {
715 if (!serial) {
716 pr_debug("%s - serial == NULL\n", function);
717 return -1;
718 }
719 if (!serial->type) {
720 pr_debug("%s - serial->type == NULL!\n", function);
721 return -1;
722 }
723
724 return 0;
725 }
726
mos7840_get_usb_serial(struct usb_serial_port * port,const char * function)727 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
728 const char *function)
729 {
730 /* if no port was specified, or it fails a paranoia check */
731 if (!port ||
732 mos7840_port_paranoia_check(port, function) ||
733 mos7840_serial_paranoia_check(port->serial, function)) {
734 /* then say that we don't have a valid usb_serial thing,
735 * which will end up genrating -ENODEV return values */
736 return NULL;
737 }
738
739 return port->serial;
740 }
741
742 /*****************************************************************************
743 * mos7840_bulk_in_callback
744 * this is the callback function for when we have received data on the
745 * bulk in endpoint.
746 *****************************************************************************/
747
mos7840_bulk_in_callback(struct urb * urb)748 static void mos7840_bulk_in_callback(struct urb *urb)
749 {
750 int retval;
751 unsigned char *data;
752 struct usb_serial *serial;
753 struct usb_serial_port *port;
754 struct moschip_port *mos7840_port;
755 int status = urb->status;
756
757 mos7840_port = urb->context;
758 if (!mos7840_port)
759 return;
760
761 if (status) {
762 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
763 mos7840_port->read_urb_busy = false;
764 return;
765 }
766
767 port = mos7840_port->port;
768 if (mos7840_port_paranoia_check(port, __func__)) {
769 mos7840_port->read_urb_busy = false;
770 return;
771 }
772
773 serial = mos7840_get_usb_serial(port, __func__);
774 if (!serial) {
775 mos7840_port->read_urb_busy = false;
776 return;
777 }
778
779 data = urb->transfer_buffer;
780 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
781
782 if (urb->actual_length) {
783 struct tty_port *tport = &mos7840_port->port->port;
784 tty_insert_flip_string(tport, data, urb->actual_length);
785 tty_flip_buffer_push(tport);
786 port->icount.rx += urb->actual_length;
787 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
788 }
789
790 if (!mos7840_port->read_urb) {
791 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
792 mos7840_port->read_urb_busy = false;
793 return;
794 }
795
796 if (mos7840_port->has_led)
797 mos7840_led_activity(port);
798
799 mos7840_port->read_urb_busy = true;
800 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
801
802 if (retval) {
803 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
804 mos7840_port->read_urb_busy = false;
805 }
806 }
807
808 /*****************************************************************************
809 * mos7840_bulk_out_data_callback
810 * this is the callback function for when we have finished sending
811 * serial data on the bulk out endpoint.
812 *****************************************************************************/
813
mos7840_bulk_out_data_callback(struct urb * urb)814 static void mos7840_bulk_out_data_callback(struct urb *urb)
815 {
816 struct moschip_port *mos7840_port;
817 struct usb_serial_port *port;
818 int status = urb->status;
819 int i;
820
821 mos7840_port = urb->context;
822 port = mos7840_port->port;
823 spin_lock(&mos7840_port->pool_lock);
824 for (i = 0; i < NUM_URBS; i++) {
825 if (urb == mos7840_port->write_urb_pool[i]) {
826 mos7840_port->busy[i] = 0;
827 break;
828 }
829 }
830 spin_unlock(&mos7840_port->pool_lock);
831
832 if (status) {
833 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
834 return;
835 }
836
837 if (mos7840_port_paranoia_check(port, __func__))
838 return;
839
840 if (mos7840_port->open)
841 tty_port_tty_wakeup(&port->port);
842
843 }
844
845 /************************************************************************/
846 /* 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 */
847 /************************************************************************/
848
849 /*****************************************************************************
850 * mos7840_open
851 * this function is called by the tty driver when a port is opened
852 * If successful, we return 0
853 * Otherwise we return a negative error number.
854 *****************************************************************************/
855
mos7840_open(struct tty_struct * tty,struct usb_serial_port * port)856 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
857 {
858 int response;
859 int j;
860 struct usb_serial *serial;
861 struct urb *urb;
862 __u16 Data;
863 int status;
864 struct moschip_port *mos7840_port;
865 struct moschip_port *port0;
866
867 if (mos7840_port_paranoia_check(port, __func__))
868 return -ENODEV;
869
870 serial = port->serial;
871
872 if (mos7840_serial_paranoia_check(serial, __func__))
873 return -ENODEV;
874
875 mos7840_port = mos7840_get_port_private(port);
876 port0 = mos7840_get_port_private(serial->port[0]);
877
878 if (mos7840_port == NULL || port0 == NULL)
879 return -ENODEV;
880
881 usb_clear_halt(serial->dev, port->write_urb->pipe);
882 usb_clear_halt(serial->dev, port->read_urb->pipe);
883 port0->open_ports++;
884
885 /* Initialising the write urb pool */
886 for (j = 0; j < NUM_URBS; ++j) {
887 urb = usb_alloc_urb(0, GFP_KERNEL);
888 mos7840_port->write_urb_pool[j] = urb;
889 if (!urb)
890 continue;
891
892 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
893 GFP_KERNEL);
894 if (!urb->transfer_buffer) {
895 usb_free_urb(urb);
896 mos7840_port->write_urb_pool[j] = NULL;
897 continue;
898 }
899 }
900
901 /*****************************************************************************
902 * Initialize MCS7840 -- Write Init values to corresponding Registers
903 *
904 * Register Index
905 * 1 : IER
906 * 2 : FCR
907 * 3 : LCR
908 * 4 : MCR
909 *
910 * 0x08 : SP1/2 Control Reg
911 *****************************************************************************/
912
913 /* NEED to check the following Block */
914
915 Data = 0x0;
916 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
917 if (status < 0) {
918 dev_dbg(&port->dev, "Reading Spreg failed\n");
919 goto err;
920 }
921 Data |= 0x80;
922 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
923 if (status < 0) {
924 dev_dbg(&port->dev, "writing Spreg failed\n");
925 goto err;
926 }
927
928 Data &= ~0x80;
929 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
930 if (status < 0) {
931 dev_dbg(&port->dev, "writing Spreg failed\n");
932 goto err;
933 }
934 /* End of block to be checked */
935
936 Data = 0x0;
937 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
938 &Data);
939 if (status < 0) {
940 dev_dbg(&port->dev, "Reading Controlreg failed\n");
941 goto err;
942 }
943 Data |= 0x08; /* Driver done bit */
944 Data |= 0x20; /* rx_disable */
945 status = mos7840_set_reg_sync(port,
946 mos7840_port->ControlRegOffset, Data);
947 if (status < 0) {
948 dev_dbg(&port->dev, "writing Controlreg failed\n");
949 goto err;
950 }
951 /* do register settings here */
952 /* Set all regs to the device default values. */
953 /***********************************
954 * First Disable all interrupts.
955 ***********************************/
956 Data = 0x00;
957 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
958 if (status < 0) {
959 dev_dbg(&port->dev, "disabling interrupts failed\n");
960 goto err;
961 }
962 /* Set FIFO_CONTROL_REGISTER to the default value */
963 Data = 0x00;
964 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
965 if (status < 0) {
966 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
967 goto err;
968 }
969
970 Data = 0xcf;
971 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
972 if (status < 0) {
973 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
974 goto err;
975 }
976
977 Data = 0x03;
978 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
979 mos7840_port->shadowLCR = Data;
980
981 Data = 0x0b;
982 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
983 mos7840_port->shadowMCR = Data;
984
985 Data = 0x00;
986 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
987 mos7840_port->shadowLCR = Data;
988
989 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
990 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
991
992 Data = 0x0c;
993 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
994
995 Data = 0x0;
996 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
997
998 Data = 0x00;
999 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1000
1001 Data = Data & ~SERIAL_LCR_DLAB;
1002 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1003 mos7840_port->shadowLCR = Data;
1004
1005 /* clearing Bulkin and Bulkout Fifo */
1006 Data = 0x0;
1007 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1008
1009 Data = Data | 0x0c;
1010 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1011
1012 Data = Data & ~0x0c;
1013 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1014 /* Finally enable all interrupts */
1015 Data = 0x0c;
1016 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1017
1018 /* clearing rx_disable */
1019 Data = 0x0;
1020 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1021 &Data);
1022 Data = Data & ~0x20;
1023 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1024 Data);
1025
1026 /* rx_negate */
1027 Data = 0x0;
1028 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1029 &Data);
1030 Data = Data | 0x10;
1031 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1032 Data);
1033
1034 /* Check to see if we've set up our endpoint info yet *
1035 * (can't set it up in mos7840_startup as the structures *
1036 * were not set up at that time.) */
1037 if (port0->open_ports == 1) {
1038 if (serial->port[0]->interrupt_in_buffer == NULL) {
1039 /* set up interrupt urb */
1040 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1041 serial->dev,
1042 usb_rcvintpipe(serial->dev,
1043 serial->port[0]->interrupt_in_endpointAddress),
1044 serial->port[0]->interrupt_in_buffer,
1045 serial->port[0]->interrupt_in_urb->
1046 transfer_buffer_length,
1047 mos7840_interrupt_callback,
1048 serial,
1049 serial->port[0]->interrupt_in_urb->interval);
1050
1051 /* start interrupt read for mos7840 *
1052 * will continue as long as mos7840 is connected */
1053
1054 response =
1055 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1056 GFP_KERNEL);
1057 if (response) {
1058 dev_err(&port->dev, "%s - Error %d submitting "
1059 "interrupt urb\n", __func__, response);
1060 }
1061
1062 }
1063
1064 }
1065
1066 /* see if we've set up our endpoint info yet *
1067 * (can't set it up in mos7840_startup as the *
1068 * structures were not set up at that time.) */
1069
1070 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
1071 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
1072 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1073 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1074 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1075 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1076 mos7840_port->read_urb = port->read_urb;
1077
1078 /* set up our bulk in urb */
1079 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1080 usb_fill_bulk_urb(mos7840_port->read_urb,
1081 serial->dev,
1082 usb_rcvbulkpipe(serial->dev,
1083 (port->bulk_in_endpointAddress) + 2),
1084 port->bulk_in_buffer,
1085 mos7840_port->read_urb->transfer_buffer_length,
1086 mos7840_bulk_in_callback, mos7840_port);
1087 } else {
1088 usb_fill_bulk_urb(mos7840_port->read_urb,
1089 serial->dev,
1090 usb_rcvbulkpipe(serial->dev,
1091 port->bulk_in_endpointAddress),
1092 port->bulk_in_buffer,
1093 mos7840_port->read_urb->transfer_buffer_length,
1094 mos7840_bulk_in_callback, mos7840_port);
1095 }
1096
1097 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1098 mos7840_port->read_urb_busy = true;
1099 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1100 if (response) {
1101 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1102 __func__, response);
1103 mos7840_port->read_urb_busy = false;
1104 }
1105
1106 /* initialize our port settings */
1107 /* Must set to enable ints! */
1108 mos7840_port->shadowMCR = MCR_MASTER_IE;
1109 /* send a open port command */
1110 mos7840_port->open = 1;
1111 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1112
1113 return 0;
1114 err:
1115 for (j = 0; j < NUM_URBS; ++j) {
1116 urb = mos7840_port->write_urb_pool[j];
1117 if (!urb)
1118 continue;
1119 kfree(urb->transfer_buffer);
1120 usb_free_urb(urb);
1121 }
1122 return status;
1123 }
1124
1125 /*****************************************************************************
1126 * mos7840_chars_in_buffer
1127 * this function is called by the tty driver when it wants to know how many
1128 * bytes of data we currently have outstanding in the port (data that has
1129 * been written, but hasn't made it out the port yet)
1130 * If successful, we return the number of bytes left to be written in the
1131 * system,
1132 * Otherwise we return zero.
1133 *****************************************************************************/
1134
mos7840_chars_in_buffer(struct tty_struct * tty)1135 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1136 {
1137 struct usb_serial_port *port = tty->driver_data;
1138 int i;
1139 int chars = 0;
1140 unsigned long flags;
1141 struct moschip_port *mos7840_port;
1142
1143 if (mos7840_port_paranoia_check(port, __func__))
1144 return 0;
1145
1146 mos7840_port = mos7840_get_port_private(port);
1147 if (mos7840_port == NULL)
1148 return 0;
1149
1150 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1151 for (i = 0; i < NUM_URBS; ++i) {
1152 if (mos7840_port->busy[i]) {
1153 struct urb *urb = mos7840_port->write_urb_pool[i];
1154 chars += urb->transfer_buffer_length;
1155 }
1156 }
1157 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1158 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1159 return chars;
1160
1161 }
1162
1163 /*****************************************************************************
1164 * mos7840_close
1165 * this function is called by the tty driver when a port is closed
1166 *****************************************************************************/
1167
mos7840_close(struct usb_serial_port * port)1168 static void mos7840_close(struct usb_serial_port *port)
1169 {
1170 struct usb_serial *serial;
1171 struct moschip_port *mos7840_port;
1172 struct moschip_port *port0;
1173 int j;
1174 __u16 Data;
1175
1176 if (mos7840_port_paranoia_check(port, __func__))
1177 return;
1178
1179 serial = mos7840_get_usb_serial(port, __func__);
1180 if (!serial)
1181 return;
1182
1183 mos7840_port = mos7840_get_port_private(port);
1184 port0 = mos7840_get_port_private(serial->port[0]);
1185
1186 if (mos7840_port == NULL || port0 == NULL)
1187 return;
1188
1189 for (j = 0; j < NUM_URBS; ++j)
1190 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1191
1192 /* Freeing Write URBs */
1193 for (j = 0; j < NUM_URBS; ++j) {
1194 if (mos7840_port->write_urb_pool[j]) {
1195 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer);
1196 usb_free_urb(mos7840_port->write_urb_pool[j]);
1197 }
1198 }
1199
1200 usb_kill_urb(mos7840_port->write_urb);
1201 usb_kill_urb(mos7840_port->read_urb);
1202 mos7840_port->read_urb_busy = false;
1203
1204 port0->open_ports--;
1205 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
1206 if (port0->open_ports == 0) {
1207 if (serial->port[0]->interrupt_in_urb) {
1208 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1209 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1210 }
1211 }
1212
1213 if (mos7840_port->write_urb) {
1214 /* if this urb had a transfer buffer already (old tx) free it */
1215 kfree(mos7840_port->write_urb->transfer_buffer);
1216 usb_free_urb(mos7840_port->write_urb);
1217 }
1218
1219 Data = 0x0;
1220 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1221
1222 Data = 0x00;
1223 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1224
1225 mos7840_port->open = 0;
1226 }
1227
1228 /*****************************************************************************
1229 * mos7840_break
1230 * this function sends a break to the port
1231 *****************************************************************************/
mos7840_break(struct tty_struct * tty,int break_state)1232 static void mos7840_break(struct tty_struct *tty, int break_state)
1233 {
1234 struct usb_serial_port *port = tty->driver_data;
1235 unsigned char data;
1236 struct usb_serial *serial;
1237 struct moschip_port *mos7840_port;
1238
1239 if (mos7840_port_paranoia_check(port, __func__))
1240 return;
1241
1242 serial = mos7840_get_usb_serial(port, __func__);
1243 if (!serial)
1244 return;
1245
1246 mos7840_port = mos7840_get_port_private(port);
1247
1248 if (mos7840_port == NULL)
1249 return;
1250
1251 if (break_state == -1)
1252 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1253 else
1254 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1255
1256 /* FIXME: no locking on shadowLCR anywhere in driver */
1257 mos7840_port->shadowLCR = data;
1258 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1259 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1260 mos7840_port->shadowLCR);
1261 }
1262
1263 /*****************************************************************************
1264 * mos7840_write_room
1265 * this function is called by the tty driver when it wants to know how many
1266 * bytes of data we can accept for a specific port.
1267 * If successful, we return the amount of room that we have for this port
1268 * Otherwise we return a negative error number.
1269 *****************************************************************************/
1270
mos7840_write_room(struct tty_struct * tty)1271 static int mos7840_write_room(struct tty_struct *tty)
1272 {
1273 struct usb_serial_port *port = tty->driver_data;
1274 int i;
1275 int room = 0;
1276 unsigned long flags;
1277 struct moschip_port *mos7840_port;
1278
1279 if (mos7840_port_paranoia_check(port, __func__))
1280 return -1;
1281
1282 mos7840_port = mos7840_get_port_private(port);
1283 if (mos7840_port == NULL)
1284 return -1;
1285
1286 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1287 for (i = 0; i < NUM_URBS; ++i) {
1288 if (!mos7840_port->busy[i])
1289 room += URB_TRANSFER_BUFFER_SIZE;
1290 }
1291 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1292
1293 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1294 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1295 return room;
1296
1297 }
1298
1299 /*****************************************************************************
1300 * mos7840_write
1301 * this function is called by the tty driver when data should be written to
1302 * the port.
1303 * If successful, we return the number of bytes written, otherwise we
1304 * return a negative error number.
1305 *****************************************************************************/
1306
mos7840_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * data,int count)1307 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1308 const unsigned char *data, int count)
1309 {
1310 int status;
1311 int i;
1312 int bytes_sent = 0;
1313 int transfer_size;
1314 unsigned long flags;
1315
1316 struct moschip_port *mos7840_port;
1317 struct usb_serial *serial;
1318 struct urb *urb;
1319 /* __u16 Data; */
1320 const unsigned char *current_position = data;
1321 unsigned char *data1;
1322
1323 #ifdef NOTMOS7840
1324 Data = 0x00;
1325 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1326 mos7840_port->shadowLCR = Data;
1327 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1328 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1329
1330 /* Data = 0x03; */
1331 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1332 /* mos7840_port->shadowLCR=Data;//Need to add later */
1333
1334 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1335 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1336
1337 /* Data = 0x0c; */
1338 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1339 Data = 0x00;
1340 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1341 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1342
1343 Data = 0x0;
1344 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1345 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1346
1347 Data = Data & ~SERIAL_LCR_DLAB;
1348 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1349 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1350 #endif
1351
1352 if (mos7840_port_paranoia_check(port, __func__))
1353 return -1;
1354
1355 serial = port->serial;
1356 if (mos7840_serial_paranoia_check(serial, __func__))
1357 return -1;
1358
1359 mos7840_port = mos7840_get_port_private(port);
1360 if (mos7840_port == NULL)
1361 return -1;
1362
1363 /* try to find a free urb in the list */
1364 urb = NULL;
1365
1366 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1367 for (i = 0; i < NUM_URBS; ++i) {
1368 if (!mos7840_port->busy[i]) {
1369 mos7840_port->busy[i] = 1;
1370 urb = mos7840_port->write_urb_pool[i];
1371 dev_dbg(&port->dev, "URB:%d\n", i);
1372 break;
1373 }
1374 }
1375 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1376
1377 if (urb == NULL) {
1378 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1379 goto exit;
1380 }
1381
1382 if (urb->transfer_buffer == NULL) {
1383 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
1384 GFP_ATOMIC);
1385 if (!urb->transfer_buffer)
1386 goto exit;
1387 }
1388 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1389
1390 memcpy(urb->transfer_buffer, current_position, transfer_size);
1391
1392 /* fill urb with data and submit */
1393 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1394 usb_fill_bulk_urb(urb,
1395 serial->dev,
1396 usb_sndbulkpipe(serial->dev,
1397 (port->bulk_out_endpointAddress) + 2),
1398 urb->transfer_buffer,
1399 transfer_size,
1400 mos7840_bulk_out_data_callback, mos7840_port);
1401 } else {
1402 usb_fill_bulk_urb(urb,
1403 serial->dev,
1404 usb_sndbulkpipe(serial->dev,
1405 port->bulk_out_endpointAddress),
1406 urb->transfer_buffer,
1407 transfer_size,
1408 mos7840_bulk_out_data_callback, mos7840_port);
1409 }
1410
1411 data1 = urb->transfer_buffer;
1412 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1413
1414 if (mos7840_port->has_led)
1415 mos7840_led_activity(port);
1416
1417 /* send it down the pipe */
1418 status = usb_submit_urb(urb, GFP_ATOMIC);
1419
1420 if (status) {
1421 mos7840_port->busy[i] = 0;
1422 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1423 "with status = %d\n", __func__, status);
1424 bytes_sent = status;
1425 goto exit;
1426 }
1427 bytes_sent = transfer_size;
1428 port->icount.tx += transfer_size;
1429 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
1430 exit:
1431 return bytes_sent;
1432
1433 }
1434
1435 /*****************************************************************************
1436 * mos7840_throttle
1437 * this function is called by the tty driver when it wants to stop the data
1438 * being read from the port.
1439 *****************************************************************************/
1440
mos7840_throttle(struct tty_struct * tty)1441 static void mos7840_throttle(struct tty_struct *tty)
1442 {
1443 struct usb_serial_port *port = tty->driver_data;
1444 struct moschip_port *mos7840_port;
1445 int status;
1446
1447 if (mos7840_port_paranoia_check(port, __func__))
1448 return;
1449
1450 mos7840_port = mos7840_get_port_private(port);
1451
1452 if (mos7840_port == NULL)
1453 return;
1454
1455 if (!mos7840_port->open) {
1456 dev_dbg(&port->dev, "%s", "port not opened\n");
1457 return;
1458 }
1459
1460 /* if we are implementing XON/XOFF, send the stop character */
1461 if (I_IXOFF(tty)) {
1462 unsigned char stop_char = STOP_CHAR(tty);
1463 status = mos7840_write(tty, port, &stop_char, 1);
1464 if (status <= 0)
1465 return;
1466 }
1467 /* if we are implementing RTS/CTS, toggle that line */
1468 if (tty->termios.c_cflag & CRTSCTS) {
1469 mos7840_port->shadowMCR &= ~MCR_RTS;
1470 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1471 mos7840_port->shadowMCR);
1472 if (status < 0)
1473 return;
1474 }
1475 }
1476
1477 /*****************************************************************************
1478 * mos7840_unthrottle
1479 * this function is called by the tty driver when it wants to resume
1480 * the data being read from the port (called after mos7840_throttle is
1481 * called)
1482 *****************************************************************************/
mos7840_unthrottle(struct tty_struct * tty)1483 static void mos7840_unthrottle(struct tty_struct *tty)
1484 {
1485 struct usb_serial_port *port = tty->driver_data;
1486 int status;
1487 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1488
1489 if (mos7840_port_paranoia_check(port, __func__))
1490 return;
1491
1492 if (mos7840_port == NULL)
1493 return;
1494
1495 if (!mos7840_port->open) {
1496 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1497 return;
1498 }
1499
1500 /* if we are implementing XON/XOFF, send the start character */
1501 if (I_IXOFF(tty)) {
1502 unsigned char start_char = START_CHAR(tty);
1503 status = mos7840_write(tty, port, &start_char, 1);
1504 if (status <= 0)
1505 return;
1506 }
1507
1508 /* if we are implementing RTS/CTS, toggle that line */
1509 if (tty->termios.c_cflag & CRTSCTS) {
1510 mos7840_port->shadowMCR |= MCR_RTS;
1511 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1512 mos7840_port->shadowMCR);
1513 if (status < 0)
1514 return;
1515 }
1516 }
1517
mos7840_tiocmget(struct tty_struct * tty)1518 static int mos7840_tiocmget(struct tty_struct *tty)
1519 {
1520 struct usb_serial_port *port = tty->driver_data;
1521 struct moschip_port *mos7840_port;
1522 unsigned int result;
1523 __u16 msr;
1524 __u16 mcr;
1525 int status;
1526 mos7840_port = mos7840_get_port_private(port);
1527
1528 if (mos7840_port == NULL)
1529 return -ENODEV;
1530
1531 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1532 if (status < 0)
1533 return -EIO;
1534 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1535 if (status < 0)
1536 return -EIO;
1537 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1538 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1539 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1540 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1541 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1542 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1543 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1544
1545 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1546
1547 return result;
1548 }
1549
mos7840_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)1550 static int mos7840_tiocmset(struct tty_struct *tty,
1551 unsigned int set, unsigned int clear)
1552 {
1553 struct usb_serial_port *port = tty->driver_data;
1554 struct moschip_port *mos7840_port;
1555 unsigned int mcr;
1556 int status;
1557
1558 mos7840_port = mos7840_get_port_private(port);
1559
1560 if (mos7840_port == NULL)
1561 return -ENODEV;
1562
1563 /* FIXME: What locks the port registers ? */
1564 mcr = mos7840_port->shadowMCR;
1565 if (clear & TIOCM_RTS)
1566 mcr &= ~MCR_RTS;
1567 if (clear & TIOCM_DTR)
1568 mcr &= ~MCR_DTR;
1569 if (clear & TIOCM_LOOP)
1570 mcr &= ~MCR_LOOPBACK;
1571
1572 if (set & TIOCM_RTS)
1573 mcr |= MCR_RTS;
1574 if (set & TIOCM_DTR)
1575 mcr |= MCR_DTR;
1576 if (set & TIOCM_LOOP)
1577 mcr |= MCR_LOOPBACK;
1578
1579 mos7840_port->shadowMCR = mcr;
1580
1581 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1582 if (status < 0) {
1583 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1584 return status;
1585 }
1586
1587 return 0;
1588 }
1589
1590 /*****************************************************************************
1591 * mos7840_calc_baud_rate_divisor
1592 * this function calculates the proper baud rate divisor for the specified
1593 * baud rate.
1594 *****************************************************************************/
mos7840_calc_baud_rate_divisor(struct usb_serial_port * port,int baudRate,int * divisor,__u16 * clk_sel_val)1595 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1596 int baudRate, int *divisor,
1597 __u16 *clk_sel_val)
1598 {
1599 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1600
1601 if (baudRate <= 115200) {
1602 *divisor = 115200 / baudRate;
1603 *clk_sel_val = 0x0;
1604 }
1605 if ((baudRate > 115200) && (baudRate <= 230400)) {
1606 *divisor = 230400 / baudRate;
1607 *clk_sel_val = 0x10;
1608 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1609 *divisor = 403200 / baudRate;
1610 *clk_sel_val = 0x20;
1611 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1612 *divisor = 460800 / baudRate;
1613 *clk_sel_val = 0x30;
1614 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1615 *divisor = 806400 / baudRate;
1616 *clk_sel_val = 0x40;
1617 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1618 *divisor = 921600 / baudRate;
1619 *clk_sel_val = 0x50;
1620 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1621 *divisor = 1572864 / baudRate;
1622 *clk_sel_val = 0x60;
1623 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1624 *divisor = 3145728 / baudRate;
1625 *clk_sel_val = 0x70;
1626 }
1627 return 0;
1628
1629 #ifdef NOTMCS7840
1630
1631 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1632 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1633 *divisor = mos7840_divisor_table[i].Divisor;
1634 return 0;
1635 }
1636 }
1637
1638 /* After trying for all the standard baud rates *
1639 * Try calculating the divisor for this baud rate */
1640
1641 if (baudrate > 75 && baudrate < 230400) {
1642 /* get the divisor */
1643 custom = (__u16) (230400L / baudrate);
1644
1645 /* Check for round off */
1646 round1 = (__u16) (2304000L / baudrate);
1647 round = (__u16) (round1 - (custom * 10));
1648 if (round > 4)
1649 custom++;
1650 *divisor = custom;
1651
1652 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1653 return 0;
1654 }
1655
1656 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1657 return -1;
1658 #endif
1659 }
1660
1661 /*****************************************************************************
1662 * mos7840_send_cmd_write_baud_rate
1663 * this function sends the proper command to change the baud rate of the
1664 * specified port.
1665 *****************************************************************************/
1666
mos7840_send_cmd_write_baud_rate(struct moschip_port * mos7840_port,int baudRate)1667 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1668 int baudRate)
1669 {
1670 int divisor = 0;
1671 int status;
1672 __u16 Data;
1673 unsigned char number;
1674 __u16 clk_sel_val;
1675 struct usb_serial_port *port;
1676
1677 if (mos7840_port == NULL)
1678 return -1;
1679
1680 port = mos7840_port->port;
1681 if (mos7840_port_paranoia_check(port, __func__))
1682 return -1;
1683
1684 if (mos7840_serial_paranoia_check(port->serial, __func__))
1685 return -1;
1686
1687 number = mos7840_port->port->port_number;
1688
1689 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1690 /* reset clk_uart_sel in spregOffset */
1691 if (baudRate > 115200) {
1692 #ifdef HW_flow_control
1693 /* NOTE: need to see the pther register to modify */
1694 /* setting h/w flow control bit to 1 */
1695 Data = 0x2b;
1696 mos7840_port->shadowMCR = Data;
1697 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1698 Data);
1699 if (status < 0) {
1700 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1701 return -1;
1702 }
1703 #endif
1704
1705 } else {
1706 #ifdef HW_flow_control
1707 /* setting h/w flow control bit to 0 */
1708 Data = 0xb;
1709 mos7840_port->shadowMCR = Data;
1710 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1711 Data);
1712 if (status < 0) {
1713 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1714 return -1;
1715 }
1716 #endif
1717
1718 }
1719
1720 if (1) { /* baudRate <= 115200) */
1721 clk_sel_val = 0x0;
1722 Data = 0x0;
1723 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1724 &clk_sel_val);
1725 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1726 &Data);
1727 if (status < 0) {
1728 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1729 return -1;
1730 }
1731 Data = (Data & 0x8f) | clk_sel_val;
1732 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1733 Data);
1734 if (status < 0) {
1735 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1736 return -1;
1737 }
1738 /* Calculate the Divisor */
1739
1740 if (status) {
1741 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1742 return status;
1743 }
1744 /* Enable access to divisor latch */
1745 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1746 mos7840_port->shadowLCR = Data;
1747 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1748
1749 /* Write the divisor */
1750 Data = (unsigned char)(divisor & 0xff);
1751 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1752 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1753
1754 Data = (unsigned char)((divisor & 0xff00) >> 8);
1755 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1756 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1757
1758 /* Disable access to divisor latch */
1759 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1760 mos7840_port->shadowLCR = Data;
1761 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1762
1763 }
1764 return status;
1765 }
1766
1767 /*****************************************************************************
1768 * mos7840_change_port_settings
1769 * This routine is called to set the UART on the device to match
1770 * the specified new settings.
1771 *****************************************************************************/
1772
mos7840_change_port_settings(struct tty_struct * tty,struct moschip_port * mos7840_port,struct ktermios * old_termios)1773 static void mos7840_change_port_settings(struct tty_struct *tty,
1774 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1775 {
1776 int baud;
1777 unsigned cflag;
1778 unsigned iflag;
1779 __u8 lData;
1780 __u8 lParity;
1781 __u8 lStop;
1782 int status;
1783 __u16 Data;
1784 struct usb_serial_port *port;
1785 struct usb_serial *serial;
1786
1787 if (mos7840_port == NULL)
1788 return;
1789
1790 port = mos7840_port->port;
1791
1792 if (mos7840_port_paranoia_check(port, __func__))
1793 return;
1794
1795 if (mos7840_serial_paranoia_check(port->serial, __func__))
1796 return;
1797
1798 serial = port->serial;
1799
1800 if (!mos7840_port->open) {
1801 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1802 return;
1803 }
1804
1805 lData = LCR_BITS_8;
1806 lStop = LCR_STOP_1;
1807 lParity = LCR_PAR_NONE;
1808
1809 cflag = tty->termios.c_cflag;
1810 iflag = tty->termios.c_iflag;
1811
1812 /* Change the number of bits */
1813 switch (cflag & CSIZE) {
1814 case CS5:
1815 lData = LCR_BITS_5;
1816 break;
1817
1818 case CS6:
1819 lData = LCR_BITS_6;
1820 break;
1821
1822 case CS7:
1823 lData = LCR_BITS_7;
1824 break;
1825
1826 default:
1827 case CS8:
1828 lData = LCR_BITS_8;
1829 break;
1830 }
1831
1832 /* Change the Parity bit */
1833 if (cflag & PARENB) {
1834 if (cflag & PARODD) {
1835 lParity = LCR_PAR_ODD;
1836 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1837 } else {
1838 lParity = LCR_PAR_EVEN;
1839 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1840 }
1841
1842 } else {
1843 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1844 }
1845
1846 if (cflag & CMSPAR)
1847 lParity = lParity | 0x20;
1848
1849 /* Change the Stop bit */
1850 if (cflag & CSTOPB) {
1851 lStop = LCR_STOP_2;
1852 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1853 } else {
1854 lStop = LCR_STOP_1;
1855 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1856 }
1857
1858 /* Update the LCR with the correct value */
1859 mos7840_port->shadowLCR &=
1860 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1861 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1862
1863 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1864 mos7840_port->shadowLCR);
1865 /* Disable Interrupts */
1866 Data = 0x00;
1867 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1868
1869 Data = 0x00;
1870 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1871
1872 Data = 0xcf;
1873 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1874
1875 /* Send the updated LCR value to the mos7840 */
1876 Data = mos7840_port->shadowLCR;
1877
1878 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1879
1880 Data = 0x00b;
1881 mos7840_port->shadowMCR = Data;
1882 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1883 Data = 0x00b;
1884 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1885
1886 /* set up the MCR register and send it to the mos7840 */
1887
1888 mos7840_port->shadowMCR = MCR_MASTER_IE;
1889 if (cflag & CBAUD)
1890 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1891
1892 if (cflag & CRTSCTS)
1893 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1894 else
1895 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1896
1897 Data = mos7840_port->shadowMCR;
1898 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1899
1900 /* Determine divisor based on baud rate */
1901 baud = tty_get_baud_rate(tty);
1902
1903 if (!baud) {
1904 /* pick a default, any default... */
1905 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1906 baud = 9600;
1907 }
1908
1909 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1910 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1911
1912 /* Enable Interrupts */
1913 Data = 0x0c;
1914 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1915
1916 if (mos7840_port->read_urb_busy == false) {
1917 mos7840_port->read_urb_busy = true;
1918 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1919 if (status) {
1920 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1921 status);
1922 mos7840_port->read_urb_busy = false;
1923 }
1924 }
1925 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1926 mos7840_port->shadowLCR);
1927 }
1928
1929 /*****************************************************************************
1930 * mos7840_set_termios
1931 * this function is called by the tty driver when it wants to change
1932 * the termios structure
1933 *****************************************************************************/
1934
mos7840_set_termios(struct tty_struct * tty,struct usb_serial_port * port,struct ktermios * old_termios)1935 static void mos7840_set_termios(struct tty_struct *tty,
1936 struct usb_serial_port *port,
1937 struct ktermios *old_termios)
1938 {
1939 int status;
1940 unsigned int cflag;
1941 struct usb_serial *serial;
1942 struct moschip_port *mos7840_port;
1943
1944 if (mos7840_port_paranoia_check(port, __func__))
1945 return;
1946
1947 serial = port->serial;
1948
1949 if (mos7840_serial_paranoia_check(serial, __func__))
1950 return;
1951
1952 mos7840_port = mos7840_get_port_private(port);
1953
1954 if (mos7840_port == NULL)
1955 return;
1956
1957 if (!mos7840_port->open) {
1958 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1959 return;
1960 }
1961
1962 dev_dbg(&port->dev, "%s", "setting termios - \n");
1963
1964 cflag = tty->termios.c_cflag;
1965
1966 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
1967 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
1968 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
1969 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
1970
1971 /* change the port settings to the new ones specified */
1972
1973 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1974
1975 if (!mos7840_port->read_urb) {
1976 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
1977 return;
1978 }
1979
1980 if (mos7840_port->read_urb_busy == false) {
1981 mos7840_port->read_urb_busy = true;
1982 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1983 if (status) {
1984 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1985 status);
1986 mos7840_port->read_urb_busy = false;
1987 }
1988 }
1989 }
1990
1991 /*****************************************************************************
1992 * mos7840_get_lsr_info - get line status register info
1993 *
1994 * Purpose: Let user call ioctl() to get info when the UART physically
1995 * is emptied. On bus types like RS485, the transmitter must
1996 * release the bus after transmitting. This must be done when
1997 * the transmit shift register is empty, not be done when the
1998 * transmit holding register is empty. This functionality
1999 * allows an RS485 driver to be written in user space.
2000 *****************************************************************************/
2001
mos7840_get_lsr_info(struct tty_struct * tty,unsigned int __user * value)2002 static int mos7840_get_lsr_info(struct tty_struct *tty,
2003 unsigned int __user *value)
2004 {
2005 int count;
2006 unsigned int result = 0;
2007
2008 count = mos7840_chars_in_buffer(tty);
2009 if (count == 0)
2010 result = TIOCSER_TEMT;
2011
2012 if (copy_to_user(value, &result, sizeof(int)))
2013 return -EFAULT;
2014 return 0;
2015 }
2016
2017 /*****************************************************************************
2018 * mos7840_get_serial_info
2019 * function to get information about serial port
2020 *****************************************************************************/
2021
mos7840_get_serial_info(struct moschip_port * mos7840_port,struct serial_struct __user * retinfo)2022 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2023 struct serial_struct __user *retinfo)
2024 {
2025 struct serial_struct tmp;
2026
2027 if (mos7840_port == NULL)
2028 return -1;
2029
2030 if (!retinfo)
2031 return -EFAULT;
2032
2033 memset(&tmp, 0, sizeof(tmp));
2034
2035 tmp.type = PORT_16550A;
2036 tmp.line = mos7840_port->port->minor;
2037 tmp.port = mos7840_port->port->port_number;
2038 tmp.irq = 0;
2039 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2040 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2041 tmp.baud_base = 9600;
2042 tmp.close_delay = 5 * HZ;
2043 tmp.closing_wait = 30 * HZ;
2044
2045 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2046 return -EFAULT;
2047 return 0;
2048 }
2049
2050 /*****************************************************************************
2051 * SerialIoctl
2052 * this function handles any ioctl calls to the driver
2053 *****************************************************************************/
2054
mos7840_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)2055 static int mos7840_ioctl(struct tty_struct *tty,
2056 unsigned int cmd, unsigned long arg)
2057 {
2058 struct usb_serial_port *port = tty->driver_data;
2059 void __user *argp = (void __user *)arg;
2060 struct moschip_port *mos7840_port;
2061
2062 if (mos7840_port_paranoia_check(port, __func__))
2063 return -1;
2064
2065 mos7840_port = mos7840_get_port_private(port);
2066
2067 if (mos7840_port == NULL)
2068 return -1;
2069
2070 switch (cmd) {
2071 /* return number of bytes available */
2072
2073 case TIOCSERGETLSR:
2074 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2075 return mos7840_get_lsr_info(tty, argp);
2076
2077 case TIOCGSERIAL:
2078 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2079 return mos7840_get_serial_info(mos7840_port, argp);
2080
2081 case TIOCSSERIAL:
2082 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2083 break;
2084 default:
2085 break;
2086 }
2087 return -ENOIOCTLCMD;
2088 }
2089
mos7810_check(struct usb_serial * serial)2090 static int mos7810_check(struct usb_serial *serial)
2091 {
2092 int i, pass_count = 0;
2093 u8 *buf;
2094 __u16 data = 0, mcr_data = 0;
2095 __u16 test_pattern = 0x55AA;
2096 int res;
2097
2098 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2099 if (!buf)
2100 return 0; /* failed to identify 7810 */
2101
2102 /* Store MCR setting */
2103 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2104 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2105 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2106 if (res == VENDOR_READ_LENGTH)
2107 mcr_data = *buf;
2108
2109 for (i = 0; i < 16; i++) {
2110 /* Send the 1-bit test pattern out to MCS7810 test pin */
2111 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2112 MCS_WRREQ, MCS_WR_RTYPE,
2113 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2114 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2115
2116 /* Read the test pattern back */
2117 res = usb_control_msg(serial->dev,
2118 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2119 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2120 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2121 if (res == VENDOR_READ_LENGTH)
2122 data = *buf;
2123
2124 /* If this is a MCS7810 device, both test patterns must match */
2125 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2126 break;
2127
2128 pass_count++;
2129 }
2130
2131 /* Restore MCR setting */
2132 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2133 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2134 0, MOS_WDR_TIMEOUT);
2135
2136 kfree(buf);
2137
2138 if (pass_count == 16)
2139 return 1;
2140
2141 return 0;
2142 }
2143
mos7840_probe(struct usb_serial * serial,const struct usb_device_id * id)2144 static int mos7840_probe(struct usb_serial *serial,
2145 const struct usb_device_id *id)
2146 {
2147 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
2148 u8 *buf;
2149 int device_type;
2150
2151 if (product == MOSCHIP_DEVICE_ID_7810 ||
2152 product == MOSCHIP_DEVICE_ID_7820) {
2153 device_type = product;
2154 goto out;
2155 }
2156
2157 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2158 if (!buf)
2159 return -ENOMEM;
2160
2161 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2162 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2163 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2164
2165 /* For a MCS7840 device GPIO0 must be set to 1 */
2166 if (buf[0] & 0x01)
2167 device_type = MOSCHIP_DEVICE_ID_7840;
2168 else if (mos7810_check(serial))
2169 device_type = MOSCHIP_DEVICE_ID_7810;
2170 else
2171 device_type = MOSCHIP_DEVICE_ID_7820;
2172
2173 kfree(buf);
2174 out:
2175 usb_set_serial_data(serial, (void *)(unsigned long)device_type);
2176
2177 return 0;
2178 }
2179
mos7840_calc_num_ports(struct usb_serial * serial)2180 static int mos7840_calc_num_ports(struct usb_serial *serial)
2181 {
2182 int device_type = (unsigned long)usb_get_serial_data(serial);
2183 int mos7840_num_ports;
2184
2185 mos7840_num_ports = (device_type >> 4) & 0x000F;
2186
2187 return mos7840_num_ports;
2188 }
2189
mos7840_port_probe(struct usb_serial_port * port)2190 static int mos7840_port_probe(struct usb_serial_port *port)
2191 {
2192 struct usb_serial *serial = port->serial;
2193 int device_type = (unsigned long)usb_get_serial_data(serial);
2194 struct moschip_port *mos7840_port;
2195 int status;
2196 int pnum;
2197 __u16 Data;
2198
2199 /* we set up the pointers to the endpoints in the mos7840_open *
2200 * function, as the structures aren't created yet. */
2201
2202 pnum = port->port_number;
2203
2204 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2205 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2206 if (!mos7840_port)
2207 return -ENOMEM;
2208
2209 /* Initialize all port interrupt end point to port 0 int
2210 * endpoint. Our device has only one interrupt end point
2211 * common to all port */
2212
2213 mos7840_port->port = port;
2214 mos7840_set_port_private(port, mos7840_port);
2215 spin_lock_init(&mos7840_port->pool_lock);
2216
2217 /* minor is not initialised until later by
2218 * usb-serial.c:get_free_serial() and cannot therefore be used
2219 * to index device instances */
2220 mos7840_port->port_num = pnum + 1;
2221 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
2222 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2223
2224 if (mos7840_port->port_num == 1) {
2225 mos7840_port->SpRegOffset = 0x0;
2226 mos7840_port->ControlRegOffset = 0x1;
2227 mos7840_port->DcrRegOffset = 0x4;
2228 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2229 mos7840_port->SpRegOffset = 0x8;
2230 mos7840_port->ControlRegOffset = 0x9;
2231 mos7840_port->DcrRegOffset = 0x16;
2232 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2233 mos7840_port->SpRegOffset = 0xa;
2234 mos7840_port->ControlRegOffset = 0xb;
2235 mos7840_port->DcrRegOffset = 0x19;
2236 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2237 mos7840_port->SpRegOffset = 0xa;
2238 mos7840_port->ControlRegOffset = 0xb;
2239 mos7840_port->DcrRegOffset = 0x19;
2240 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2241 mos7840_port->SpRegOffset = 0xc;
2242 mos7840_port->ControlRegOffset = 0xd;
2243 mos7840_port->DcrRegOffset = 0x1c;
2244 }
2245 mos7840_dump_serial_port(port, mos7840_port);
2246 mos7840_set_port_private(port, mos7840_port);
2247
2248 /* enable rx_disable bit in control register */
2249 status = mos7840_get_reg_sync(port,
2250 mos7840_port->ControlRegOffset, &Data);
2251 if (status < 0) {
2252 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2253 goto out;
2254 } else
2255 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2256 Data |= 0x08; /* setting driver done bit */
2257 Data |= 0x04; /* sp1_bit to have cts change reflect in
2258 modem status reg */
2259
2260 /* Data |= 0x20; //rx_disable bit */
2261 status = mos7840_set_reg_sync(port,
2262 mos7840_port->ControlRegOffset, Data);
2263 if (status < 0) {
2264 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2265 goto out;
2266 } else
2267 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2268
2269 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2270 and 0x24 in DCR3 */
2271 Data = 0x01;
2272 status = mos7840_set_reg_sync(port,
2273 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2274 if (status < 0) {
2275 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2276 goto out;
2277 } else
2278 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2279
2280 Data = 0x05;
2281 status = mos7840_set_reg_sync(port,
2282 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2283 if (status < 0) {
2284 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2285 goto out;
2286 } else
2287 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2288
2289 Data = 0x24;
2290 status = mos7840_set_reg_sync(port,
2291 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2292 if (status < 0) {
2293 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2294 goto out;
2295 } else
2296 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2297
2298 /* write values in clkstart0x0 and clkmulti 0x20 */
2299 Data = 0x0;
2300 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2301 if (status < 0) {
2302 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2303 goto out;
2304 } else
2305 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2306
2307 Data = 0x20;
2308 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2309 if (status < 0) {
2310 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2311 goto error;
2312 } else
2313 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2314
2315 /* write value 0x0 to scratchpad register */
2316 Data = 0x00;
2317 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2318 if (status < 0) {
2319 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2320 goto out;
2321 } else
2322 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2323
2324 /* Zero Length flag register */
2325 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2326 Data = 0xff;
2327 status = mos7840_set_reg_sync(port,
2328 (__u16) (ZLP_REG1 +
2329 ((__u16)mos7840_port->port_num)), Data);
2330 dev_dbg(&port->dev, "ZLIP offset %x\n",
2331 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2332 if (status < 0) {
2333 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2334 goto out;
2335 } else
2336 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2337 } else {
2338 Data = 0xff;
2339 status = mos7840_set_reg_sync(port,
2340 (__u16) (ZLP_REG1 +
2341 ((__u16)mos7840_port->port_num) - 0x1), Data);
2342 dev_dbg(&port->dev, "ZLIP offset %x\n",
2343 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2344 if (status < 0) {
2345 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2346 goto out;
2347 } else
2348 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2349
2350 }
2351 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2352 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2353 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2354 GFP_KERNEL);
2355 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2356 !mos7840_port->dr) {
2357 status = -ENOMEM;
2358 goto error;
2359 }
2360
2361 mos7840_port->has_led = false;
2362
2363 /* Initialize LED timers */
2364 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2365 mos7840_port->has_led = true;
2366
2367 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2368 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2369 GFP_KERNEL);
2370 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2371 status = -ENOMEM;
2372 goto error;
2373 }
2374
2375 init_timer(&mos7840_port->led_timer1);
2376 mos7840_port->led_timer1.function = mos7840_led_off;
2377 mos7840_port->led_timer1.expires =
2378 jiffies + msecs_to_jiffies(LED_ON_MS);
2379 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2380
2381 init_timer(&mos7840_port->led_timer2);
2382 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2383 mos7840_port->led_timer2.expires =
2384 jiffies + msecs_to_jiffies(LED_OFF_MS);
2385 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2386
2387 /* Turn off LED */
2388 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2389 }
2390 out:
2391 if (pnum == serial->num_ports - 1) {
2392 /* Zero Length flag enable */
2393 Data = 0x0f;
2394 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2395 if (status < 0) {
2396 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2397 goto error;
2398 } else
2399 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2400
2401 /* setting configuration feature to one */
2402 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2403 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2404 MOS_WDR_TIMEOUT);
2405 }
2406 return 0;
2407 error:
2408 kfree(mos7840_port->led_dr);
2409 usb_free_urb(mos7840_port->led_urb);
2410 kfree(mos7840_port->dr);
2411 kfree(mos7840_port->ctrl_buf);
2412 usb_free_urb(mos7840_port->control_urb);
2413 kfree(mos7840_port);
2414
2415 return status;
2416 }
2417
mos7840_port_remove(struct usb_serial_port * port)2418 static int mos7840_port_remove(struct usb_serial_port *port)
2419 {
2420 struct moschip_port *mos7840_port;
2421
2422 mos7840_port = mos7840_get_port_private(port);
2423
2424 if (mos7840_port->has_led) {
2425 /* Turn off LED */
2426 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2427
2428 del_timer_sync(&mos7840_port->led_timer1);
2429 del_timer_sync(&mos7840_port->led_timer2);
2430
2431 usb_kill_urb(mos7840_port->led_urb);
2432 usb_free_urb(mos7840_port->led_urb);
2433 kfree(mos7840_port->led_dr);
2434 }
2435 usb_kill_urb(mos7840_port->control_urb);
2436 usb_free_urb(mos7840_port->control_urb);
2437 kfree(mos7840_port->ctrl_buf);
2438 kfree(mos7840_port->dr);
2439 kfree(mos7840_port);
2440
2441 return 0;
2442 }
2443
2444 static struct usb_serial_driver moschip7840_4port_device = {
2445 .driver = {
2446 .owner = THIS_MODULE,
2447 .name = "mos7840",
2448 },
2449 .description = DRIVER_DESC,
2450 .id_table = id_table,
2451 .num_ports = 4,
2452 .open = mos7840_open,
2453 .close = mos7840_close,
2454 .write = mos7840_write,
2455 .write_room = mos7840_write_room,
2456 .chars_in_buffer = mos7840_chars_in_buffer,
2457 .throttle = mos7840_throttle,
2458 .unthrottle = mos7840_unthrottle,
2459 .calc_num_ports = mos7840_calc_num_ports,
2460 .probe = mos7840_probe,
2461 .ioctl = mos7840_ioctl,
2462 .set_termios = mos7840_set_termios,
2463 .break_ctl = mos7840_break,
2464 .tiocmget = mos7840_tiocmget,
2465 .tiocmset = mos7840_tiocmset,
2466 .tiocmiwait = usb_serial_generic_tiocmiwait,
2467 .get_icount = usb_serial_generic_get_icount,
2468 .port_probe = mos7840_port_probe,
2469 .port_remove = mos7840_port_remove,
2470 .read_bulk_callback = mos7840_bulk_in_callback,
2471 .read_int_callback = mos7840_interrupt_callback,
2472 };
2473
2474 static struct usb_serial_driver * const serial_drivers[] = {
2475 &moschip7840_4port_device, NULL
2476 };
2477
2478 module_usb_serial_driver(serial_drivers, id_table);
2479
2480 MODULE_DESCRIPTION(DRIVER_DESC);
2481 MODULE_LICENSE("GPL");
2482