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1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
15 | * | |
16 | * Clean ups from Moschip version and a few ioctl implementations by: | |
17 | * Paul B Schroeder <pschroeder "at" uplogix "dot" com> | |
18 | * | |
19 | * Originally based on drivers/usb/serial/io_edgeport.c which is: | |
20 | * Copyright (C) 2000 Inside Out Networks, All rights reserved. | |
21 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/errno.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/tty.h> | |
30 | #include <linux/tty_driver.h> | |
31 | #include <linux/tty_flip.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/serial.h> | |
34 | #include <linux/usb.h> | |
35 | #include <linux/usb/serial.h> | |
36 | #include <asm/uaccess.h> | |
37 | ||
38 | /* | |
39 | * Version Information | |
40 | */ | |
41 | #define DRIVER_VERSION "1.3.1" | |
42 | #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" | |
43 | ||
44 | /* | |
45 | * 16C50 UART register defines | |
46 | */ | |
47 | ||
48 | #define LCR_BITS_5 0x00 /* 5 bits/char */ | |
49 | #define LCR_BITS_6 0x01 /* 6 bits/char */ | |
50 | #define LCR_BITS_7 0x02 /* 7 bits/char */ | |
51 | #define LCR_BITS_8 0x03 /* 8 bits/char */ | |
52 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
53 | ||
54 | #define LCR_STOP_1 0x00 /* 1 stop bit */ | |
55 | #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ | |
56 | #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ | |
57 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
58 | ||
59 | #define LCR_PAR_NONE 0x00 /* No parity */ | |
60 | #define LCR_PAR_ODD 0x08 /* Odd parity */ | |
61 | #define LCR_PAR_EVEN 0x18 /* Even parity */ | |
62 | #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ | |
63 | #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ | |
64 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
65 | ||
66 | #define LCR_SET_BREAK 0x40 /* Set Break condition */ | |
67 | #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ | |
68 | ||
69 | #define MCR_DTR 0x01 /* Assert DTR */ | |
70 | #define MCR_RTS 0x02 /* Assert RTS */ | |
71 | #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ | |
72 | #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ | |
73 | #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ | |
74 | #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ | |
75 | ||
76 | #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ | |
77 | #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ | |
78 | #define MOS7840_MSR_RI 0x40 /* Current state of RI */ | |
79 | #define MOS7840_MSR_CD 0x80 /* Current state of CD */ | |
80 | ||
81 | /* | |
82 | * Defines used for sending commands to port | |
83 | */ | |
84 | ||
85 | #define WAIT_FOR_EVER (HZ * 0 ) /* timeout urb is wait for ever */ | |
86 | #define MOS_WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */ | |
87 | ||
88 | #define MOS_PORT1 0x0200 | |
89 | #define MOS_PORT2 0x0300 | |
90 | #define MOS_VENREG 0x0000 | |
91 | #define MOS_MAX_PORT 0x02 | |
92 | #define MOS_WRITE 0x0E | |
93 | #define MOS_READ 0x0D | |
94 | ||
95 | /* Requests */ | |
96 | #define MCS_RD_RTYPE 0xC0 | |
97 | #define MCS_WR_RTYPE 0x40 | |
98 | #define MCS_RDREQ 0x0D | |
99 | #define MCS_WRREQ 0x0E | |
100 | #define MCS_CTRL_TIMEOUT 500 | |
101 | #define VENDOR_READ_LENGTH (0x01) | |
102 | ||
103 | #define MAX_NAME_LEN 64 | |
104 | ||
105 | #define ZLP_REG1 0x3A //Zero_Flag_Reg1 58 | |
106 | #define ZLP_REG5 0x3E //Zero_Flag_Reg5 62 | |
107 | ||
108 | /* For higher baud Rates use TIOCEXBAUD */ | |
109 | #define TIOCEXBAUD 0x5462 | |
110 | ||
111 | /* vendor id and device id defines */ | |
112 | ||
113 | #define USB_VENDOR_ID_MOSCHIP 0x9710 | |
114 | #define MOSCHIP_DEVICE_ID_7840 0x7840 | |
115 | #define MOSCHIP_DEVICE_ID_7820 0x7820 | |
116 | ||
117 | /* Interrupt Rotinue Defines */ | |
118 | ||
119 | #define SERIAL_IIR_RLS 0x06 | |
120 | #define SERIAL_IIR_MS 0x00 | |
121 | ||
122 | /* | |
123 | * Emulation of the bit mask on the LINE STATUS REGISTER. | |
124 | */ | |
125 | #define SERIAL_LSR_DR 0x0001 | |
126 | #define SERIAL_LSR_OE 0x0002 | |
127 | #define SERIAL_LSR_PE 0x0004 | |
128 | #define SERIAL_LSR_FE 0x0008 | |
129 | #define SERIAL_LSR_BI 0x0010 | |
130 | ||
131 | #define MOS_MSR_DELTA_CTS 0x10 | |
132 | #define MOS_MSR_DELTA_DSR 0x20 | |
133 | #define MOS_MSR_DELTA_RI 0x40 | |
134 | #define MOS_MSR_DELTA_CD 0x80 | |
135 | ||
136 | // Serial Port register Address | |
137 | #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) | |
138 | #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) | |
139 | #define LINE_CONTROL_REGISTER ((__u16)(0x03)) | |
140 | #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) | |
141 | #define LINE_STATUS_REGISTER ((__u16)(0x05)) | |
142 | #define MODEM_STATUS_REGISTER ((__u16)(0x06)) | |
143 | #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) | |
144 | #define DIVISOR_LATCH_LSB ((__u16)(0x00)) | |
145 | #define DIVISOR_LATCH_MSB ((__u16)(0x01)) | |
146 | ||
147 | #define CLK_MULTI_REGISTER ((__u16)(0x02)) | |
148 | #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) | |
149 | ||
150 | #define SERIAL_LCR_DLAB ((__u16)(0x0080)) | |
151 | ||
152 | /* | |
153 | * URB POOL related defines | |
154 | */ | |
155 | #define NUM_URBS 16 /* URB Count */ | |
156 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
157 | ||
158 | ||
159 | static struct usb_device_id moschip_port_id_table[] = { | |
160 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, | |
161 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
162 | {} /* terminating entry */ | |
163 | }; | |
164 | ||
165 | static __devinitdata struct usb_device_id moschip_id_table_combined[] = { | |
166 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, | |
167 | {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, | |
168 | {} /* terminating entry */ | |
169 | }; | |
170 | ||
171 | MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); | |
172 | ||
173 | /* This structure holds all of the local port information */ | |
174 | ||
175 | struct moschip_port { | |
176 | int port_num; /*Actual port number in the device(1,2,etc) */ | |
177 | struct urb *write_urb; /* write URB for this port */ | |
178 | struct urb *read_urb; /* read URB for this port */ | |
179 | __u8 shadowLCR; /* last LCR value received */ | |
180 | __u8 shadowMCR; /* last MCR value received */ | |
181 | char open; | |
182 | wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ | |
183 | wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ | |
184 | int delta_msr_cond; | |
185 | struct async_icount icount; | |
186 | struct usb_serial_port *port; /* loop back to the owner of this object */ | |
187 | ||
188 | /*Offsets */ | |
189 | __u8 SpRegOffset; | |
190 | __u8 ControlRegOffset; | |
191 | __u8 DcrRegOffset; | |
192 | //for processing control URBS in interrupt context | |
193 | struct urb *control_urb; | |
194 | char *ctrl_buf; | |
195 | int MsrLsr; | |
196 | ||
197 | struct urb *write_urb_pool[NUM_URBS]; | |
198 | }; | |
199 | ||
200 | ||
201 | static int debug; | |
202 | static int mos7840_num_ports; //this says the number of ports in the device | |
203 | static int mos7840_num_open_ports; | |
204 | ||
205 | ||
206 | /* | |
207 | * mos7840_set_reg_sync | |
208 | * To set the Control register by calling usb_fill_control_urb function | |
209 | * by passing usb_sndctrlpipe function as parameter. | |
210 | */ | |
211 | ||
212 | static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, | |
213 | __u16 val) | |
214 | { | |
215 | struct usb_device *dev = port->serial->dev; | |
216 | val = val & 0x00ff; | |
217 | dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val); | |
218 | ||
219 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
220 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
221 | MOS_WDR_TIMEOUT); | |
222 | } | |
223 | ||
224 | /* | |
225 | * mos7840_get_reg_sync | |
226 | * To set the Uart register by calling usb_fill_control_urb function by | |
227 | * passing usb_rcvctrlpipe function as parameter. | |
228 | */ | |
229 | ||
230 | static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, | |
231 | __u16 * val) | |
232 | { | |
233 | struct usb_device *dev = port->serial->dev; | |
234 | int ret = 0; | |
235 | ||
236 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
237 | MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, | |
238 | MOS_WDR_TIMEOUT); | |
239 | dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val); | |
240 | *val = (*val) & 0x00ff; | |
241 | return ret; | |
242 | } | |
243 | ||
244 | /* | |
245 | * mos7840_set_uart_reg | |
246 | * To set the Uart register by calling usb_fill_control_urb function by | |
247 | * passing usb_sndctrlpipe function as parameter. | |
248 | */ | |
249 | ||
250 | static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, | |
251 | __u16 val) | |
252 | { | |
253 | ||
254 | struct usb_device *dev = port->serial->dev; | |
255 | val = val & 0x00ff; | |
256 | // For the UART control registers, the application number need to be Or'ed | |
257 | if (mos7840_num_ports == 4) { | |
258 | val |= | |
259 | (((__u16) port->number - (__u16) (port->serial->minor)) + | |
260 | 1) << 8; | |
261 | dbg("mos7840_set_uart_reg application number is %x\n", val); | |
262 | } else { | |
263 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
264 | val |= | |
265 | (((__u16) port->number - | |
266 | (__u16) (port->serial->minor)) + 1) << 8; | |
267 | dbg("mos7840_set_uart_reg application number is %x\n", | |
268 | val); | |
269 | } else { | |
270 | val |= | |
271 | (((__u16) port->number - | |
272 | (__u16) (port->serial->minor)) + 2) << 8; | |
273 | dbg("mos7840_set_uart_reg application number is %x\n", | |
274 | val); | |
275 | } | |
276 | } | |
277 | return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, | |
278 | MCS_WR_RTYPE, val, reg, NULL, 0, | |
279 | MOS_WDR_TIMEOUT); | |
280 | ||
281 | } | |
282 | ||
283 | /* | |
284 | * mos7840_get_uart_reg | |
285 | * To set the Control register by calling usb_fill_control_urb function | |
286 | * by passing usb_rcvctrlpipe function as parameter. | |
287 | */ | |
288 | static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, | |
289 | __u16 * val) | |
290 | { | |
291 | struct usb_device *dev = port->serial->dev; | |
292 | int ret = 0; | |
293 | __u16 Wval; | |
294 | ||
295 | //dbg("application number is %4x \n",(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); | |
296 | /*Wval is same as application number */ | |
297 | if (mos7840_num_ports == 4) { | |
298 | Wval = | |
299 | (((__u16) port->number - (__u16) (port->serial->minor)) + | |
300 | 1) << 8; | |
301 | dbg("mos7840_get_uart_reg application number is %x\n", Wval); | |
302 | } else { | |
303 | if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { | |
304 | Wval = | |
305 | (((__u16) port->number - | |
306 | (__u16) (port->serial->minor)) + 1) << 8; | |
307 | dbg("mos7840_get_uart_reg application number is %x\n", | |
308 | Wval); | |
309 | } else { | |
310 | Wval = | |
311 | (((__u16) port->number - | |
312 | (__u16) (port->serial->minor)) + 2) << 8; | |
313 | dbg("mos7840_get_uart_reg application number is %x\n", | |
314 | Wval); | |
315 | } | |
316 | } | |
317 | ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, | |
318 | MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, | |
319 | MOS_WDR_TIMEOUT); | |
320 | *val = (*val) & 0x00ff; | |
321 | return ret; | |
322 | } | |
323 | ||
324 | static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) | |
325 | { | |
326 | ||
327 | dbg("***************************************\n"); | |
328 | dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset); | |
329 | dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset); | |
330 | dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset); | |
331 | dbg("***************************************\n"); | |
332 | ||
333 | } | |
334 | ||
335 | /************************************************************************/ | |
336 | /************************************************************************/ | |
337 | /* I N T E R F A C E F U N C T I O N S */ | |
338 | /* I N T E R F A C E F U N C T I O N S */ | |
339 | /************************************************************************/ | |
340 | /************************************************************************/ | |
341 | ||
342 | static inline void mos7840_set_port_private(struct usb_serial_port *port, | |
343 | struct moschip_port *data) | |
344 | { | |
345 | usb_set_serial_port_data(port, (void *)data); | |
346 | } | |
347 | ||
348 | static inline struct moschip_port *mos7840_get_port_private(struct | |
349 | usb_serial_port | |
350 | *port) | |
351 | { | |
352 | return (struct moschip_port *)usb_get_serial_port_data(port); | |
353 | } | |
354 | ||
355 | static int mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) | |
356 | { | |
357 | struct moschip_port *mos7840_port; | |
358 | struct async_icount *icount; | |
359 | mos7840_port = port; | |
360 | icount = &mos7840_port->icount; | |
361 | if (new_msr & | |
362 | (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | | |
363 | MOS_MSR_DELTA_CD)) { | |
364 | icount = &mos7840_port->icount; | |
365 | ||
366 | /* update input line counters */ | |
367 | if (new_msr & MOS_MSR_DELTA_CTS) { | |
368 | icount->cts++; | |
369 | } | |
370 | if (new_msr & MOS_MSR_DELTA_DSR) { | |
371 | icount->dsr++; | |
372 | } | |
373 | if (new_msr & MOS_MSR_DELTA_CD) { | |
374 | icount->dcd++; | |
375 | } | |
376 | if (new_msr & MOS_MSR_DELTA_RI) { | |
377 | icount->rng++; | |
378 | } | |
379 | } | |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
384 | static int mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) | |
385 | { | |
386 | struct async_icount *icount; | |
387 | ||
388 | dbg("%s - %02x", __FUNCTION__, new_lsr); | |
389 | ||
390 | if (new_lsr & SERIAL_LSR_BI) { | |
391 | // | |
392 | // Parity and Framing errors only count if they | |
393 | // occur exclusive of a break being | |
394 | // received. | |
395 | // | |
396 | new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); | |
397 | } | |
398 | ||
399 | /* update input line counters */ | |
400 | icount = &port->icount; | |
401 | if (new_lsr & SERIAL_LSR_BI) { | |
402 | icount->brk++; | |
403 | } | |
404 | if (new_lsr & SERIAL_LSR_OE) { | |
405 | icount->overrun++; | |
406 | } | |
407 | if (new_lsr & SERIAL_LSR_PE) { | |
408 | icount->parity++; | |
409 | } | |
410 | if (new_lsr & SERIAL_LSR_FE) { | |
411 | icount->frame++; | |
412 | } | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | /************************************************************************/ | |
418 | /************************************************************************/ | |
419 | /* U S B C A L L B A C K F U N C T I O N S */ | |
420 | /* U S B C A L L B A C K F U N C T I O N S */ | |
421 | /************************************************************************/ | |
422 | /************************************************************************/ | |
423 | ||
424 | static void mos7840_control_callback(struct urb *urb, struct pt_regs *regs) | |
425 | { | |
426 | unsigned char *data; | |
427 | struct moschip_port *mos7840_port; | |
428 | __u8 regval = 0x0; | |
429 | ||
430 | if (!urb) { | |
431 | dbg("%s", "Invalid Pointer !!!!:\n"); | |
432 | return; | |
433 | } | |
434 | ||
435 | switch (urb->status) { | |
436 | case 0: | |
437 | /* success */ | |
438 | break; | |
439 | case -ECONNRESET: | |
440 | case -ENOENT: | |
441 | case -ESHUTDOWN: | |
442 | /* this urb is terminated, clean up */ | |
443 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, | |
444 | urb->status); | |
445 | return; | |
446 | default: | |
447 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, | |
448 | urb->status); | |
449 | goto exit; | |
450 | } | |
451 | ||
452 | mos7840_port = (struct moschip_port *)urb->context; | |
453 | ||
454 | dbg("%s urb buffer size is %d\n", __FUNCTION__, urb->actual_length); | |
455 | dbg("%s mos7840_port->MsrLsr is %d port %d\n", __FUNCTION__, | |
456 | mos7840_port->MsrLsr, mos7840_port->port_num); | |
457 | data = urb->transfer_buffer; | |
458 | regval = (__u8) data[0]; | |
459 | dbg("%s data is %x\n", __FUNCTION__, regval); | |
460 | if (mos7840_port->MsrLsr == 0) | |
461 | mos7840_handle_new_msr(mos7840_port, regval); | |
462 | else if (mos7840_port->MsrLsr == 1) | |
463 | mos7840_handle_new_lsr(mos7840_port, regval); | |
464 | ||
465 | exit: | |
466 | return; | |
467 | } | |
468 | ||
469 | static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, | |
470 | __u16 * val) | |
471 | { | |
472 | struct usb_device *dev = mcs->port->serial->dev; | |
473 | struct usb_ctrlrequest *dr = NULL; | |
474 | unsigned char *buffer = NULL; | |
475 | int ret = 0; | |
476 | buffer = (__u8 *) mcs->ctrl_buf; | |
477 | ||
478 | // dr=(struct usb_ctrlrequest *)(buffer); | |
479 | dr = (void *)(buffer + 2); | |
480 | dr->bRequestType = MCS_RD_RTYPE; | |
481 | dr->bRequest = MCS_RDREQ; | |
482 | dr->wValue = cpu_to_le16(Wval); //0; | |
483 | dr->wIndex = cpu_to_le16(reg); | |
484 | dr->wLength = cpu_to_le16(2); | |
485 | ||
486 | usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), | |
487 | (unsigned char *)dr, buffer, 2, | |
488 | mos7840_control_callback, mcs); | |
489 | mcs->control_urb->transfer_buffer_length = 2; | |
490 | ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); | |
491 | return ret; | |
492 | } | |
493 | ||
494 | /***************************************************************************** | |
495 | * mos7840_interrupt_callback | |
496 | * this is the callback function for when we have received data on the | |
497 | * interrupt endpoint. | |
498 | *****************************************************************************/ | |
499 | ||
500 | static void mos7840_interrupt_callback(struct urb *urb, struct pt_regs *regs) | |
501 | { | |
502 | int result; | |
503 | int length; | |
504 | struct moschip_port *mos7840_port; | |
505 | struct usb_serial *serial; | |
506 | __u16 Data; | |
507 | unsigned char *data; | |
508 | __u8 sp[5], st; | |
509 | int i; | |
510 | __u16 wval; | |
511 | ||
512 | dbg("%s", " : Entering\n"); | |
513 | if (!urb) { | |
514 | dbg("%s", "Invalid Pointer !!!!:\n"); | |
515 | return; | |
516 | } | |
517 | ||
518 | switch (urb->status) { | |
519 | case 0: | |
520 | /* success */ | |
521 | break; | |
522 | case -ECONNRESET: | |
523 | case -ENOENT: | |
524 | case -ESHUTDOWN: | |
525 | /* this urb is terminated, clean up */ | |
526 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, | |
527 | urb->status); | |
528 | return; | |
529 | default: | |
530 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, | |
531 | urb->status); | |
532 | goto exit; | |
533 | } | |
534 | ||
535 | length = urb->actual_length; | |
536 | data = urb->transfer_buffer; | |
537 | ||
538 | serial = (struct usb_serial *)urb->context; | |
539 | ||
540 | /* Moschip get 5 bytes | |
541 | * Byte 1 IIR Port 1 (port.number is 0) | |
542 | * Byte 2 IIR Port 2 (port.number is 1) | |
543 | * Byte 3 IIR Port 3 (port.number is 2) | |
544 | * Byte 4 IIR Port 4 (port.number is 3) | |
545 | * Byte 5 FIFO status for both */ | |
546 | ||
547 | if (length && length > 5) { | |
548 | dbg("%s \n", "Wrong data !!!"); | |
549 | return; | |
550 | } | |
551 | ||
552 | sp[0] = (__u8) data[0]; | |
553 | sp[1] = (__u8) data[1]; | |
554 | sp[2] = (__u8) data[2]; | |
555 | sp[3] = (__u8) data[3]; | |
556 | st = (__u8) data[4]; | |
557 | ||
558 | for (i = 0; i < serial->num_ports; i++) { | |
559 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
560 | wval = | |
561 | (((__u16) serial->port[i]->number - | |
562 | (__u16) (serial->minor)) + 1) << 8; | |
563 | if (mos7840_port->open) { | |
564 | if (sp[i] & 0x01) { | |
565 | dbg("SP%d No Interrupt !!!\n", i); | |
566 | } else { | |
567 | switch (sp[i] & 0x0f) { | |
568 | case SERIAL_IIR_RLS: | |
569 | dbg("Serial Port %d: Receiver status error or ", i); | |
570 | dbg("address bit detected in 9-bit mode\n"); | |
571 | mos7840_port->MsrLsr = 1; | |
572 | mos7840_get_reg(mos7840_port, wval, | |
573 | LINE_STATUS_REGISTER, | |
574 | &Data); | |
575 | break; | |
576 | case SERIAL_IIR_MS: | |
577 | dbg("Serial Port %d: Modem status change\n", i); | |
578 | mos7840_port->MsrLsr = 0; | |
579 | mos7840_get_reg(mos7840_port, wval, | |
580 | MODEM_STATUS_REGISTER, | |
581 | &Data); | |
582 | break; | |
583 | } | |
584 | } | |
585 | } | |
586 | } | |
587 | exit: | |
588 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
589 | if (result) { | |
590 | dev_err(&urb->dev->dev, | |
591 | "%s - Error %d submitting interrupt urb\n", | |
592 | __FUNCTION__, result); | |
593 | } | |
594 | ||
595 | return; | |
596 | ||
597 | } | |
598 | ||
599 | static int mos7840_port_paranoia_check(struct usb_serial_port *port, | |
600 | const char *function) | |
601 | { | |
602 | if (!port) { | |
603 | dbg("%s - port == NULL", function); | |
604 | return -1; | |
605 | } | |
606 | if (!port->serial) { | |
607 | dbg("%s - port->serial == NULL", function); | |
608 | return -1; | |
609 | } | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
614 | /* Inline functions to check the sanity of a pointer that is passed to us */ | |
615 | static int mos7840_serial_paranoia_check(struct usb_serial *serial, | |
616 | const char *function) | |
617 | { | |
618 | if (!serial) { | |
619 | dbg("%s - serial == NULL", function); | |
620 | return -1; | |
621 | } | |
622 | if (!serial->type) { | |
623 | dbg("%s - serial->type == NULL!", function); | |
624 | return -1; | |
625 | } | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
630 | static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, | |
631 | const char *function) | |
632 | { | |
633 | /* if no port was specified, or it fails a paranoia check */ | |
634 | if (!port || | |
635 | mos7840_port_paranoia_check(port, function) || | |
636 | mos7840_serial_paranoia_check(port->serial, function)) { | |
637 | /* then say that we don't have a valid usb_serial thing, which will * end up genrating -ENODEV return values */ | |
638 | return NULL; | |
639 | } | |
640 | ||
641 | return port->serial; | |
642 | } | |
643 | ||
644 | /***************************************************************************** | |
645 | * mos7840_bulk_in_callback | |
646 | * this is the callback function for when we have received data on the | |
647 | * bulk in endpoint. | |
648 | *****************************************************************************/ | |
649 | ||
650 | static void mos7840_bulk_in_callback(struct urb *urb, struct pt_regs *regs) | |
651 | { | |
652 | int status; | |
653 | unsigned char *data; | |
654 | struct usb_serial *serial; | |
655 | struct usb_serial_port *port; | |
656 | struct moschip_port *mos7840_port; | |
657 | struct tty_struct *tty; | |
658 | ||
659 | if (!urb) { | |
660 | dbg("%s", "Invalid Pointer !!!!:\n"); | |
661 | return; | |
662 | } | |
663 | ||
664 | if (urb->status) { | |
665 | dbg("nonzero read bulk status received: %d", urb->status); | |
666 | return; | |
667 | } | |
668 | ||
669 | mos7840_port = (struct moschip_port *)urb->context; | |
670 | if (!mos7840_port) { | |
671 | dbg("%s", "NULL mos7840_port pointer \n"); | |
672 | return; | |
673 | } | |
674 | ||
675 | port = (struct usb_serial_port *)mos7840_port->port; | |
676 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
677 | dbg("%s", "Port Paranoia failed \n"); | |
678 | return; | |
679 | } | |
680 | ||
681 | serial = mos7840_get_usb_serial(port, __FUNCTION__); | |
682 | if (!serial) { | |
683 | dbg("%s\n", "Bad serial pointer "); | |
684 | return; | |
685 | } | |
686 | ||
687 | dbg("%s\n", "Entering... \n"); | |
688 | ||
689 | data = urb->transfer_buffer; | |
690 | ||
691 | dbg("%s", "Entering ........... \n"); | |
692 | ||
693 | if (urb->actual_length) { | |
694 | tty = mos7840_port->port->tty; | |
695 | if (tty) { | |
696 | tty_buffer_request_room(tty, urb->actual_length); | |
697 | tty_insert_flip_string(tty, data, urb->actual_length); | |
698 | dbg(" %s \n", data); | |
699 | tty_flip_buffer_push(tty); | |
700 | } | |
701 | mos7840_port->icount.rx += urb->actual_length; | |
702 | dbg("mos7840_port->icount.rx is %d:\n", | |
703 | mos7840_port->icount.rx); | |
704 | } | |
705 | ||
706 | if (!mos7840_port->read_urb) { | |
707 | dbg("%s", "URB KILLED !!!\n"); | |
708 | return; | |
709 | } | |
710 | ||
711 | if (mos7840_port->read_urb->status != -EINPROGRESS) { | |
712 | mos7840_port->read_urb->dev = serial->dev; | |
713 | ||
714 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); | |
715 | ||
716 | if (status) { | |
717 | dbg(" usb_submit_urb(read bulk) failed, status = %d", | |
718 | status); | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
723 | /***************************************************************************** | |
724 | * mos7840_bulk_out_data_callback | |
725 | * this is the callback function for when we have finished sending serial data | |
726 | * on the bulk out endpoint. | |
727 | *****************************************************************************/ | |
728 | ||
729 | static void mos7840_bulk_out_data_callback(struct urb *urb, | |
730 | struct pt_regs *regs) | |
731 | { | |
732 | struct moschip_port *mos7840_port; | |
733 | struct tty_struct *tty; | |
734 | if (!urb) { | |
735 | dbg("%s", "Invalid Pointer !!!!:\n"); | |
736 | return; | |
737 | } | |
738 | ||
739 | if (urb->status) { | |
740 | dbg("nonzero write bulk status received:%d\n", urb->status); | |
741 | return; | |
742 | } | |
743 | ||
744 | mos7840_port = (struct moschip_port *)urb->context; | |
745 | if (!mos7840_port) { | |
746 | dbg("%s", "NULL mos7840_port pointer \n"); | |
747 | return; | |
748 | } | |
749 | ||
750 | if (mos7840_port_paranoia_check(mos7840_port->port, __FUNCTION__)) { | |
751 | dbg("%s", "Port Paranoia failed \n"); | |
752 | return; | |
753 | } | |
754 | ||
755 | dbg("%s \n", "Entering ........."); | |
756 | ||
757 | tty = mos7840_port->port->tty; | |
758 | ||
759 | if (tty && mos7840_port->open) { | |
760 | /* let the tty driver wakeup if it has a special * | |
761 | * write_wakeup function */ | |
762 | ||
763 | if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) | |
764 | && tty->ldisc.write_wakeup) { | |
765 | (tty->ldisc.write_wakeup) (tty); | |
766 | } | |
767 | ||
768 | /* tell the tty driver that something has changed */ | |
769 | wake_up_interruptible(&tty->write_wait); | |
770 | } | |
771 | ||
772 | } | |
773 | ||
774 | /************************************************************************/ | |
775 | /* 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 */ | |
776 | /************************************************************************/ | |
777 | #ifdef MCSSerialProbe | |
778 | static int mos7840_serial_probe(struct usb_serial *serial, | |
779 | const struct usb_device_id *id) | |
780 | { | |
781 | ||
782 | /*need to implement the mode_reg reading and updating\ | |
783 | structures usb_serial_ device_type\ | |
784 | (i.e num_ports, num_bulkin,bulkout etc) */ | |
785 | /* Also we can update the changes attach */ | |
786 | return 1; | |
787 | } | |
788 | #endif | |
789 | ||
790 | /***************************************************************************** | |
791 | * mos7840_open | |
792 | * this function is called by the tty driver when a port is opened | |
793 | * If successful, we return 0 | |
794 | * Otherwise we return a negative error number. | |
795 | *****************************************************************************/ | |
796 | ||
797 | static int mos7840_open(struct usb_serial_port *port, struct file *filp) | |
798 | { | |
799 | int response; | |
800 | int j; | |
801 | struct usb_serial *serial; | |
802 | struct urb *urb; | |
803 | __u16 Data; | |
804 | int status; | |
805 | struct moschip_port *mos7840_port; | |
806 | ||
807 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
808 | dbg("%s", "Port Paranoia failed \n"); | |
809 | return -ENODEV; | |
810 | } | |
811 | ||
812 | mos7840_num_open_ports++; | |
813 | serial = port->serial; | |
814 | ||
815 | if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) { | |
816 | dbg("%s", "Serial Paranoia failed \n"); | |
817 | return -ENODEV; | |
818 | } | |
819 | ||
820 | mos7840_port = mos7840_get_port_private(port); | |
821 | ||
822 | if (mos7840_port == NULL) | |
823 | return -ENODEV; | |
824 | ||
825 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
826 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
827 | ||
828 | /* Initialising the write urb pool */ | |
829 | for (j = 0; j < NUM_URBS; ++j) { | |
830 | urb = usb_alloc_urb(0, SLAB_ATOMIC); | |
831 | mos7840_port->write_urb_pool[j] = urb; | |
832 | ||
833 | if (urb == NULL) { | |
834 | err("No more urbs???"); | |
835 | continue; | |
836 | } | |
837 | ||
838 | urb->transfer_buffer = NULL; | |
839 | urb->transfer_buffer = | |
840 | kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); | |
841 | if (!urb->transfer_buffer) { | |
842 | err("%s-out of memory for urb buffers.", __FUNCTION__); | |
843 | continue; | |
844 | } | |
845 | } | |
846 | ||
847 | /***************************************************************************** | |
848 | * Initialize MCS7840 -- Write Init values to corresponding Registers | |
849 | * | |
850 | * Register Index | |
851 | * 1 : IER | |
852 | * 2 : FCR | |
853 | * 3 : LCR | |
854 | * 4 : MCR | |
855 | * | |
856 | * 0x08 : SP1/2 Control Reg | |
857 | *****************************************************************************/ | |
858 | ||
859 | //NEED to check the following Block | |
860 | ||
861 | status = 0; | |
862 | Data = 0x0; | |
863 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); | |
864 | if (status < 0) { | |
865 | dbg("Reading Spreg failed\n"); | |
866 | return -1; | |
867 | } | |
868 | Data |= 0x80; | |
869 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
870 | if (status < 0) { | |
871 | dbg("writing Spreg failed\n"); | |
872 | return -1; | |
873 | } | |
874 | ||
875 | Data &= ~0x80; | |
876 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
877 | if (status < 0) { | |
878 | dbg("writing Spreg failed\n"); | |
879 | return -1; | |
880 | } | |
881 | //End of block to be checked | |
882 | ||
883 | status = 0; | |
884 | Data = 0x0; | |
885 | status = | |
886 | mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); | |
887 | if (status < 0) { | |
888 | dbg("Reading Controlreg failed\n"); | |
889 | return -1; | |
890 | } | |
891 | Data |= 0x08; //Driver done bit | |
892 | Data |= 0x20; //rx_disable | |
893 | status = 0; | |
894 | status = | |
895 | mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); | |
896 | if (status < 0) { | |
897 | dbg("writing Controlreg failed\n"); | |
898 | return -1; | |
899 | } | |
900 | //do register settings here | |
901 | // Set all regs to the device default values. | |
902 | //////////////////////////////////// | |
903 | // First Disable all interrupts. | |
904 | //////////////////////////////////// | |
905 | ||
906 | Data = 0x00; | |
907 | status = 0; | |
908 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
909 | if (status < 0) { | |
910 | dbg("disableing interrupts failed\n"); | |
911 | return -1; | |
912 | } | |
913 | // Set FIFO_CONTROL_REGISTER to the default value | |
914 | Data = 0x00; | |
915 | status = 0; | |
916 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
917 | if (status < 0) { | |
918 | dbg("Writing FIFO_CONTROL_REGISTER failed\n"); | |
919 | return -1; | |
920 | } | |
921 | ||
922 | Data = 0xcf; | |
923 | status = 0; | |
924 | status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
925 | if (status < 0) { | |
926 | dbg("Writing FIFO_CONTROL_REGISTER failed\n"); | |
927 | return -1; | |
928 | } | |
929 | ||
930 | Data = 0x03; | |
931 | status = 0; | |
932 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
933 | mos7840_port->shadowLCR = Data; | |
934 | ||
935 | Data = 0x0b; | |
936 | status = 0; | |
937 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
938 | mos7840_port->shadowMCR = Data; | |
939 | ||
940 | Data = 0x00; | |
941 | status = 0; | |
942 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); | |
943 | mos7840_port->shadowLCR = Data; | |
944 | ||
945 | Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 | |
946 | status = 0; | |
947 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
948 | ||
949 | Data = 0x0c; | |
950 | status = 0; | |
951 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); | |
952 | ||
953 | Data = 0x0; | |
954 | status = 0; | |
955 | status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); | |
956 | ||
957 | Data = 0x00; | |
958 | status = 0; | |
959 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); | |
960 | ||
961 | Data = Data & ~SERIAL_LCR_DLAB; | |
962 | status = 0; | |
963 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
964 | mos7840_port->shadowLCR = Data; | |
965 | ||
966 | //clearing Bulkin and Bulkout Fifo | |
967 | Data = 0x0; | |
968 | status = 0; | |
969 | status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); | |
970 | ||
971 | Data = Data | 0x0c; | |
972 | status = 0; | |
973 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
974 | ||
975 | Data = Data & ~0x0c; | |
976 | status = 0; | |
977 | status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
978 | //Finally enable all interrupts | |
979 | Data = 0x0; | |
980 | Data = 0x0c; | |
981 | status = 0; | |
982 | status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
983 | ||
984 | //clearing rx_disable | |
985 | Data = 0x0; | |
986 | status = 0; | |
987 | status = | |
988 | mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); | |
989 | Data = Data & ~0x20; | |
990 | status = 0; | |
991 | status = | |
992 | mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); | |
993 | ||
994 | // rx_negate | |
995 | Data = 0x0; | |
996 | status = 0; | |
997 | status = | |
998 | mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); | |
999 | Data = Data | 0x10; | |
1000 | status = 0; | |
1001 | status = | |
1002 | mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); | |
1003 | ||
1004 | /* force low_latency on so that our tty_push actually forces * | |
1005 | * the data through,otherwise it is scheduled, and with * | |
1006 | * high data rates (like with OHCI) data can get lost. */ | |
1007 | ||
1008 | if (port->tty) | |
1009 | port->tty->low_latency = 1; | |
1010 | /* Check to see if we've set up our endpoint info yet * | |
1011 | * (can't set it up in mos7840_startup as the structures * | |
1012 | * were not set up at that time.) */ | |
1013 | if (mos7840_num_open_ports == 1) { | |
1014 | if (serial->port[0]->interrupt_in_buffer == NULL) { | |
1015 | ||
1016 | /* set up interrupt urb */ | |
1017 | ||
1018 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, | |
1019 | serial->dev, | |
1020 | usb_rcvintpipe(serial->dev, | |
1021 | serial->port[0]-> | |
1022 | interrupt_in_endpointAddress), | |
1023 | serial->port[0]->interrupt_in_buffer, | |
1024 | serial->port[0]->interrupt_in_urb-> | |
1025 | transfer_buffer_length, | |
1026 | mos7840_interrupt_callback, | |
1027 | serial, | |
1028 | serial->port[0]->interrupt_in_urb-> | |
1029 | interval); | |
1030 | ||
1031 | /* start interrupt read for mos7840 * | |
1032 | * will continue as long as mos7840 is connected */ | |
1033 | ||
1034 | response = | |
1035 | usb_submit_urb(serial->port[0]->interrupt_in_urb, | |
1036 | GFP_KERNEL); | |
1037 | if (response) { | |
1038 | err("%s - Error %d submitting interrupt urb", | |
1039 | __FUNCTION__, response); | |
1040 | } | |
1041 | ||
1042 | } | |
1043 | ||
1044 | } | |
1045 | ||
1046 | /* see if we've set up our endpoint info yet * | |
1047 | * (can't set it up in mos7840_startup as the * | |
1048 | * structures were not set up at that time.) */ | |
1049 | ||
1050 | dbg("port number is %d \n", port->number); | |
1051 | dbg("serial number is %d \n", port->serial->minor); | |
1052 | dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); | |
1053 | dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); | |
1054 | dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); | |
1055 | dbg("port's number in the device is %d\n", mos7840_port->port_num); | |
1056 | mos7840_port->read_urb = port->read_urb; | |
1057 | ||
1058 | /* set up our bulk in urb */ | |
1059 | ||
1060 | usb_fill_bulk_urb(mos7840_port->read_urb, | |
1061 | serial->dev, | |
1062 | usb_rcvbulkpipe(serial->dev, | |
1063 | port->bulk_in_endpointAddress), | |
1064 | port->bulk_in_buffer, | |
1065 | mos7840_port->read_urb->transfer_buffer_length, | |
1066 | mos7840_bulk_in_callback, mos7840_port); | |
1067 | ||
1068 | dbg("mos7840_open: bulkin endpoint is %d\n", | |
1069 | port->bulk_in_endpointAddress); | |
1070 | response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); | |
1071 | if (response) { | |
1072 | err("%s - Error %d submitting control urb", __FUNCTION__, | |
1073 | response); | |
1074 | } | |
1075 | ||
1076 | /* initialize our wait queues */ | |
1077 | init_waitqueue_head(&mos7840_port->wait_chase); | |
1078 | init_waitqueue_head(&mos7840_port->delta_msr_wait); | |
1079 | ||
1080 | /* initialize our icount structure */ | |
1081 | memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); | |
1082 | ||
1083 | /* initialize our port settings */ | |
1084 | mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */ | |
1085 | /* send a open port command */ | |
1086 | mos7840_port->open = 1; | |
1087 | //mos7840_change_port_settings(mos7840_port,old_termios); | |
1088 | mos7840_port->icount.tx = 0; | |
1089 | mos7840_port->icount.rx = 0; | |
1090 | ||
1091 | dbg("\n\nusb_serial serial:%x mos7840_port:%x\n usb_serial_port port:%x\n\n", (unsigned int)serial, (unsigned int)mos7840_port, (unsigned int)port); | |
1092 | ||
1093 | return 0; | |
1094 | ||
1095 | } | |
1096 | ||
1097 | /***************************************************************************** | |
1098 | * mos7840_chars_in_buffer | |
1099 | * this function is called by the tty driver when it wants to know how many | |
1100 | * bytes of data we currently have outstanding in the port (data that has | |
1101 | * been written, but hasn't made it out the port yet) | |
1102 | * If successful, we return the number of bytes left to be written in the | |
1103 | * system, | |
1104 | * Otherwise we return a negative error number. | |
1105 | *****************************************************************************/ | |
1106 | ||
1107 | static int mos7840_chars_in_buffer(struct usb_serial_port *port) | |
1108 | { | |
1109 | int i; | |
1110 | int chars = 0; | |
1111 | struct moschip_port *mos7840_port; | |
1112 | ||
1113 | dbg("%s \n", " mos7840_chars_in_buffer:entering ..........."); | |
1114 | ||
1115 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1116 | dbg("%s", "Invalid port \n"); | |
1117 | return -1; | |
1118 | } | |
1119 | ||
1120 | mos7840_port = mos7840_get_port_private(port); | |
1121 | if (mos7840_port == NULL) { | |
1122 | dbg("%s \n", "mos7840_break:leaving ..........."); | |
1123 | return -1; | |
1124 | } | |
1125 | ||
1126 | for (i = 0; i < NUM_URBS; ++i) { | |
1127 | if (mos7840_port->write_urb_pool[i]->status == -EINPROGRESS) { | |
1128 | chars += URB_TRANSFER_BUFFER_SIZE; | |
1129 | } | |
1130 | } | |
1131 | dbg("%s - returns %d", __FUNCTION__, chars); | |
1132 | return (chars); | |
1133 | ||
1134 | } | |
1135 | ||
1136 | /************************************************************************ | |
1137 | * | |
1138 | * mos7840_block_until_tx_empty | |
1139 | * | |
1140 | * This function will block the close until one of the following: | |
1141 | * 1. TX count are 0 | |
1142 | * 2. The mos7840 has stopped | |
1143 | * 3. A timout of 3 seconds without activity has expired | |
1144 | * | |
1145 | ************************************************************************/ | |
1146 | static void mos7840_block_until_tx_empty(struct moschip_port *mos7840_port) | |
1147 | { | |
1148 | int timeout = HZ / 10; | |
1149 | int wait = 30; | |
1150 | int count; | |
1151 | ||
1152 | while (1) { | |
1153 | ||
1154 | count = mos7840_chars_in_buffer(mos7840_port->port); | |
1155 | ||
1156 | /* Check for Buffer status */ | |
1157 | if (count <= 0) { | |
1158 | return; | |
1159 | } | |
1160 | ||
1161 | /* Block the thread for a while */ | |
1162 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, | |
1163 | timeout); | |
1164 | ||
1165 | /* No activity.. count down section */ | |
1166 | wait--; | |
1167 | if (wait == 0) { | |
1168 | dbg("%s - TIMEOUT", __FUNCTION__); | |
1169 | return; | |
1170 | } else { | |
1171 | /* Reset timout value back to seconds */ | |
1172 | wait = 30; | |
1173 | } | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | /***************************************************************************** | |
1178 | * mos7840_close | |
1179 | * this function is called by the tty driver when a port is closed | |
1180 | *****************************************************************************/ | |
1181 | ||
1182 | static void mos7840_close(struct usb_serial_port *port, struct file *filp) | |
1183 | { | |
1184 | struct usb_serial *serial; | |
1185 | struct moschip_port *mos7840_port; | |
1186 | int j; | |
1187 | __u16 Data; | |
1188 | ||
1189 | dbg("%s\n", "mos7840_close:entering..."); | |
1190 | ||
1191 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1192 | dbg("%s", "Port Paranoia failed \n"); | |
1193 | return; | |
1194 | } | |
1195 | ||
1196 | serial = mos7840_get_usb_serial(port, __FUNCTION__); | |
1197 | if (!serial) { | |
1198 | dbg("%s", "Serial Paranoia failed \n"); | |
1199 | return; | |
1200 | } | |
1201 | ||
1202 | mos7840_port = mos7840_get_port_private(port); | |
1203 | ||
1204 | if (mos7840_port == NULL) { | |
1205 | return; | |
1206 | } | |
1207 | ||
1208 | for (j = 0; j < NUM_URBS; ++j) | |
1209 | usb_kill_urb(mos7840_port->write_urb_pool[j]); | |
1210 | ||
1211 | /* Freeing Write URBs */ | |
1212 | for (j = 0; j < NUM_URBS; ++j) { | |
1213 | if (mos7840_port->write_urb_pool[j]) { | |
1214 | if (mos7840_port->write_urb_pool[j]->transfer_buffer) | |
1215 | kfree(mos7840_port->write_urb_pool[j]-> | |
1216 | transfer_buffer); | |
1217 | ||
1218 | usb_free_urb(mos7840_port->write_urb_pool[j]); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | if (serial->dev) { | |
1223 | /* flush and block until tx is empty */ | |
1224 | mos7840_block_until_tx_empty(mos7840_port); | |
1225 | } | |
1226 | ||
1227 | /* While closing port, shutdown all bulk read, write * | |
1228 | * and interrupt read if they exists */ | |
1229 | if (serial->dev) { | |
1230 | ||
1231 | if (mos7840_port->write_urb) { | |
1232 | dbg("%s", "Shutdown bulk write\n"); | |
1233 | usb_kill_urb(mos7840_port->write_urb); | |
1234 | } | |
1235 | ||
1236 | if (mos7840_port->read_urb) { | |
1237 | dbg("%s", "Shutdown bulk read\n"); | |
1238 | usb_kill_urb(mos7840_port->read_urb); | |
1239 | } | |
1240 | if ((&mos7840_port->control_urb)) { | |
1241 | dbg("%s", "Shutdown control read\n"); | |
1242 | // usb_kill_urb (mos7840_port->control_urb); | |
1243 | ||
1244 | } | |
1245 | } | |
1246 | // if(mos7840_port->ctrl_buf != NULL) | |
1247 | // kfree(mos7840_port->ctrl_buf); | |
1248 | mos7840_num_open_ports--; | |
1249 | dbg("mos7840_num_open_ports in close%d:in port%d\n", | |
1250 | mos7840_num_open_ports, port->number); | |
1251 | if (mos7840_num_open_ports == 0) { | |
1252 | if (serial->port[0]->interrupt_in_urb) { | |
1253 | dbg("%s", "Shutdown interrupt_in_urb\n"); | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | if (mos7840_port->write_urb) { | |
1258 | /* if this urb had a transfer buffer already (old tx) free it */ | |
1259 | ||
1260 | if (mos7840_port->write_urb->transfer_buffer != NULL) { | |
1261 | kfree(mos7840_port->write_urb->transfer_buffer); | |
1262 | } | |
1263 | usb_free_urb(mos7840_port->write_urb); | |
1264 | } | |
1265 | ||
1266 | Data = 0x0; | |
1267 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1268 | ||
1269 | Data = 0x00; | |
1270 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
1271 | ||
1272 | mos7840_port->open = 0; | |
1273 | ||
1274 | dbg("%s \n", "Leaving ............"); | |
1275 | } | |
1276 | ||
1277 | /************************************************************************ | |
1278 | * | |
1279 | * mos7840_block_until_chase_response | |
1280 | * | |
1281 | * This function will block the close until one of the following: | |
1282 | * 1. Response to our Chase comes from mos7840 | |
1283 | * 2. A timout of 10 seconds without activity has expired | |
1284 | * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) | |
1285 | * | |
1286 | ************************************************************************/ | |
1287 | ||
1288 | static void mos7840_block_until_chase_response(struct moschip_port | |
1289 | *mos7840_port) | |
1290 | { | |
1291 | int timeout = 1 * HZ; | |
1292 | int wait = 10; | |
1293 | int count; | |
1294 | ||
1295 | while (1) { | |
1296 | count = mos7840_chars_in_buffer(mos7840_port->port); | |
1297 | ||
1298 | /* Check for Buffer status */ | |
1299 | if (count <= 0) { | |
1300 | return; | |
1301 | } | |
1302 | ||
1303 | /* Block the thread for a while */ | |
1304 | interruptible_sleep_on_timeout(&mos7840_port->wait_chase, | |
1305 | timeout); | |
1306 | /* No activity.. count down section */ | |
1307 | wait--; | |
1308 | if (wait == 0) { | |
1309 | dbg("%s - TIMEOUT", __FUNCTION__); | |
1310 | return; | |
1311 | } else { | |
1312 | /* Reset timout value back to seconds */ | |
1313 | wait = 10; | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | } | |
1318 | ||
1319 | /***************************************************************************** | |
1320 | * mos7840_break | |
1321 | * this function sends a break to the port | |
1322 | *****************************************************************************/ | |
1323 | static void mos7840_break(struct usb_serial_port *port, int break_state) | |
1324 | { | |
1325 | unsigned char data; | |
1326 | struct usb_serial *serial; | |
1327 | struct moschip_port *mos7840_port; | |
1328 | ||
1329 | dbg("%s \n", "Entering ..........."); | |
1330 | dbg("mos7840_break: Start\n"); | |
1331 | ||
1332 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1333 | dbg("%s", "Port Paranoia failed \n"); | |
1334 | return; | |
1335 | } | |
1336 | ||
1337 | serial = mos7840_get_usb_serial(port, __FUNCTION__); | |
1338 | if (!serial) { | |
1339 | dbg("%s", "Serial Paranoia failed \n"); | |
1340 | return; | |
1341 | } | |
1342 | ||
1343 | mos7840_port = mos7840_get_port_private(port); | |
1344 | ||
1345 | if (mos7840_port == NULL) { | |
1346 | return; | |
1347 | } | |
1348 | ||
1349 | if (serial->dev) { | |
1350 | ||
1351 | /* flush and block until tx is empty */ | |
1352 | mos7840_block_until_chase_response(mos7840_port); | |
1353 | } | |
1354 | ||
1355 | if (break_state == -1) { | |
1356 | data = mos7840_port->shadowLCR | LCR_SET_BREAK; | |
1357 | } else { | |
1358 | data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; | |
1359 | } | |
1360 | ||
1361 | mos7840_port->shadowLCR = data; | |
1362 | dbg("mcs7840_break mos7840_port->shadowLCR is %x\n", | |
1363 | mos7840_port->shadowLCR); | |
1364 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, | |
1365 | mos7840_port->shadowLCR); | |
1366 | ||
1367 | return; | |
1368 | } | |
1369 | ||
1370 | /***************************************************************************** | |
1371 | * mos7840_write_room | |
1372 | * this function is called by the tty driver when it wants to know how many | |
1373 | * bytes of data we can accept for a specific port. | |
1374 | * If successful, we return the amount of room that we have for this port | |
1375 | * Otherwise we return a negative error number. | |
1376 | *****************************************************************************/ | |
1377 | ||
1378 | static int mos7840_write_room(struct usb_serial_port *port) | |
1379 | { | |
1380 | int i; | |
1381 | int room = 0; | |
1382 | struct moschip_port *mos7840_port; | |
1383 | ||
1384 | dbg("%s \n", " mos7840_write_room:entering ..........."); | |
1385 | ||
1386 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1387 | dbg("%s", "Invalid port \n"); | |
1388 | dbg("%s \n", " mos7840_write_room:leaving ..........."); | |
1389 | return -1; | |
1390 | } | |
1391 | ||
1392 | mos7840_port = mos7840_get_port_private(port); | |
1393 | if (mos7840_port == NULL) { | |
1394 | dbg("%s \n", "mos7840_break:leaving ..........."); | |
1395 | return -1; | |
1396 | } | |
1397 | ||
1398 | for (i = 0; i < NUM_URBS; ++i) { | |
1399 | if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
1400 | room += URB_TRANSFER_BUFFER_SIZE; | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | dbg("%s - returns %d", __FUNCTION__, room); | |
1405 | return (room); | |
1406 | ||
1407 | } | |
1408 | ||
1409 | /***************************************************************************** | |
1410 | * mos7840_write | |
1411 | * this function is called by the tty driver when data should be written to | |
1412 | * the port. | |
1413 | * If successful, we return the number of bytes written, otherwise we | |
1414 | * return a negative error number. | |
1415 | *****************************************************************************/ | |
1416 | ||
1417 | static int mos7840_write(struct usb_serial_port *port, | |
1418 | const unsigned char *data, int count) | |
1419 | { | |
1420 | int status; | |
1421 | int i; | |
1422 | int bytes_sent = 0; | |
1423 | int transfer_size; | |
1424 | int from_user = 0; | |
1425 | ||
1426 | struct moschip_port *mos7840_port; | |
1427 | struct usb_serial *serial; | |
1428 | struct urb *urb; | |
1429 | //__u16 Data; | |
1430 | const unsigned char *current_position = data; | |
1431 | unsigned char *data1; | |
1432 | dbg("%s \n", "entering ..........."); | |
1433 | //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR); | |
1434 | ||
1435 | #ifdef NOTMOS7840 | |
1436 | Data = 0x00; | |
1437 | status = 0; | |
1438 | status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); | |
1439 | mos7840_port->shadowLCR = Data; | |
1440 | dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); | |
1441 | dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", | |
1442 | mos7840_port->shadowLCR); | |
1443 | ||
1444 | //Data = 0x03; | |
1445 | //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); | |
1446 | //mos7840_port->shadowLCR=Data;//Need to add later | |
1447 | ||
1448 | Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 | |
1449 | status = 0; | |
1450 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1451 | ||
1452 | //Data = 0x0c; | |
1453 | //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); | |
1454 | Data = 0x00; | |
1455 | status = 0; | |
1456 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); | |
1457 | dbg("mos7840_write:DLL value is %x\n", Data); | |
1458 | ||
1459 | Data = 0x0; | |
1460 | status = 0; | |
1461 | status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); | |
1462 | dbg("mos7840_write:DLM value is %x\n", Data); | |
1463 | ||
1464 | Data = Data & ~SERIAL_LCR_DLAB; | |
1465 | dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", | |
1466 | mos7840_port->shadowLCR); | |
1467 | status = 0; | |
1468 | status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1469 | #endif | |
1470 | ||
1471 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1472 | dbg("%s", "Port Paranoia failed \n"); | |
1473 | return -1; | |
1474 | } | |
1475 | ||
1476 | serial = port->serial; | |
1477 | if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) { | |
1478 | dbg("%s", "Serial Paranoia failed \n"); | |
1479 | return -1; | |
1480 | } | |
1481 | ||
1482 | mos7840_port = mos7840_get_port_private(port); | |
1483 | if (mos7840_port == NULL) { | |
1484 | dbg("%s", "mos7840_port is NULL\n"); | |
1485 | return -1; | |
1486 | } | |
1487 | ||
1488 | /* try to find a free urb in the list */ | |
1489 | urb = NULL; | |
1490 | ||
1491 | for (i = 0; i < NUM_URBS; ++i) { | |
1492 | if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
1493 | urb = mos7840_port->write_urb_pool[i]; | |
1494 | dbg("\nURB:%d", i); | |
1495 | break; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | if (urb == NULL) { | |
1500 | dbg("%s - no more free urbs", __FUNCTION__); | |
1501 | goto exit; | |
1502 | } | |
1503 | ||
1504 | if (urb->transfer_buffer == NULL) { | |
1505 | urb->transfer_buffer = | |
1506 | kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); | |
1507 | ||
1508 | if (urb->transfer_buffer == NULL) { | |
1509 | err("%s no more kernel memory...", __FUNCTION__); | |
1510 | goto exit; | |
1511 | } | |
1512 | } | |
1513 | transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); | |
1514 | ||
1515 | if (from_user) { | |
1516 | if (copy_from_user | |
1517 | (urb->transfer_buffer, current_position, transfer_size)) { | |
1518 | bytes_sent = -EFAULT; | |
1519 | goto exit; | |
1520 | } | |
1521 | } else { | |
1522 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
1523 | } | |
1524 | ||
1525 | /* fill urb with data and submit */ | |
1526 | usb_fill_bulk_urb(urb, | |
1527 | serial->dev, | |
1528 | usb_sndbulkpipe(serial->dev, | |
1529 | port->bulk_out_endpointAddress), | |
1530 | urb->transfer_buffer, | |
1531 | transfer_size, | |
1532 | mos7840_bulk_out_data_callback, mos7840_port); | |
1533 | ||
1534 | data1 = urb->transfer_buffer; | |
1535 | dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); | |
1536 | ||
1537 | /* send it down the pipe */ | |
1538 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
1539 | ||
1540 | if (status) { | |
1541 | err("%s - usb_submit_urb(write bulk) failed with status = %d", | |
1542 | __FUNCTION__, status); | |
1543 | bytes_sent = status; | |
1544 | goto exit; | |
1545 | } | |
1546 | bytes_sent = transfer_size; | |
1547 | mos7840_port->icount.tx += transfer_size; | |
1548 | dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); | |
1549 | exit: | |
1550 | ||
1551 | return bytes_sent; | |
1552 | ||
1553 | } | |
1554 | ||
1555 | /***************************************************************************** | |
1556 | * mos7840_throttle | |
1557 | * this function is called by the tty driver when it wants to stop the data | |
1558 | * being read from the port. | |
1559 | *****************************************************************************/ | |
1560 | ||
1561 | static void mos7840_throttle(struct usb_serial_port *port) | |
1562 | { | |
1563 | struct moschip_port *mos7840_port; | |
1564 | struct tty_struct *tty; | |
1565 | int status; | |
1566 | ||
1567 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1568 | dbg("%s", "Invalid port \n"); | |
1569 | return; | |
1570 | } | |
1571 | ||
1572 | dbg("- port %d\n", port->number); | |
1573 | ||
1574 | mos7840_port = mos7840_get_port_private(port); | |
1575 | ||
1576 | if (mos7840_port == NULL) | |
1577 | return; | |
1578 | ||
1579 | if (!mos7840_port->open) { | |
1580 | dbg("%s\n", "port not opened"); | |
1581 | return; | |
1582 | } | |
1583 | ||
1584 | dbg("%s", "Entering .......... \n"); | |
1585 | ||
1586 | tty = port->tty; | |
1587 | if (!tty) { | |
1588 | dbg("%s - no tty available", __FUNCTION__); | |
1589 | return; | |
1590 | } | |
1591 | ||
1592 | /* if we are implementing XON/XOFF, send the stop character */ | |
1593 | if (I_IXOFF(tty)) { | |
1594 | unsigned char stop_char = STOP_CHAR(tty); | |
1595 | status = mos7840_write(port, &stop_char, 1); | |
1596 | if (status <= 0) { | |
1597 | return; | |
1598 | } | |
1599 | } | |
1600 | ||
1601 | /* if we are implementing RTS/CTS, toggle that line */ | |
1602 | if (tty->termios->c_cflag & CRTSCTS) { | |
1603 | mos7840_port->shadowMCR &= ~MCR_RTS; | |
1604 | status = 0; | |
1605 | status = | |
1606 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, | |
1607 | mos7840_port->shadowMCR); | |
1608 | ||
1609 | if (status < 0) { | |
1610 | return; | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | return; | |
1615 | } | |
1616 | ||
1617 | /***************************************************************************** | |
1618 | * mos7840_unthrottle | |
1619 | * this function is called by the tty driver when it wants to resume the data | |
1620 | * being read from the port (called after SerialThrottle is called) | |
1621 | *****************************************************************************/ | |
1622 | static void mos7840_unthrottle(struct usb_serial_port *port) | |
1623 | { | |
1624 | struct tty_struct *tty; | |
1625 | int status; | |
1626 | struct moschip_port *mos7840_port = mos7840_get_port_private(port); | |
1627 | ||
1628 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1629 | dbg("%s", "Invalid port \n"); | |
1630 | return; | |
1631 | } | |
1632 | ||
1633 | if (mos7840_port == NULL) | |
1634 | return; | |
1635 | ||
1636 | if (!mos7840_port->open) { | |
1637 | dbg("%s - port not opened", __FUNCTION__); | |
1638 | return; | |
1639 | } | |
1640 | ||
1641 | dbg("%s", "Entering .......... \n"); | |
1642 | ||
1643 | tty = port->tty; | |
1644 | if (!tty) { | |
1645 | dbg("%s - no tty available", __FUNCTION__); | |
1646 | return; | |
1647 | } | |
1648 | ||
1649 | /* if we are implementing XON/XOFF, send the start character */ | |
1650 | if (I_IXOFF(tty)) { | |
1651 | unsigned char start_char = START_CHAR(tty); | |
1652 | status = mos7840_write(port, &start_char, 1); | |
1653 | if (status <= 0) { | |
1654 | return; | |
1655 | } | |
1656 | } | |
1657 | ||
1658 | /* if we are implementing RTS/CTS, toggle that line */ | |
1659 | if (tty->termios->c_cflag & CRTSCTS) { | |
1660 | mos7840_port->shadowMCR |= MCR_RTS; | |
1661 | status = 0; | |
1662 | status = | |
1663 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, | |
1664 | mos7840_port->shadowMCR); | |
1665 | if (status < 0) { | |
1666 | return; | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | return; | |
1671 | } | |
1672 | ||
1673 | static int mos7840_tiocmget(struct usb_serial_port *port, struct file *file) | |
1674 | { | |
1675 | struct moschip_port *mos7840_port; | |
1676 | unsigned int result; | |
1677 | __u16 msr; | |
1678 | __u16 mcr; | |
1679 | int status = 0; | |
1680 | mos7840_port = mos7840_get_port_private(port); | |
1681 | ||
1682 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1683 | ||
1684 | if (mos7840_port == NULL) | |
1685 | return -ENODEV; | |
1686 | ||
1687 | status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); | |
1688 | status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); | |
1689 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | |
1690 | | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | |
1691 | | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | |
1692 | | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) | |
1693 | | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) | |
1694 | | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) | |
1695 | | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); | |
1696 | ||
1697 | dbg("%s - 0x%04X", __FUNCTION__, result); | |
1698 | ||
1699 | return result; | |
1700 | } | |
1701 | ||
1702 | static int mos7840_tiocmset(struct usb_serial_port *port, struct file *file, | |
1703 | unsigned int set, unsigned int clear) | |
1704 | { | |
1705 | struct moschip_port *mos7840_port; | |
1706 | unsigned int mcr; | |
1707 | unsigned int status; | |
1708 | ||
1709 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1710 | ||
1711 | mos7840_port = mos7840_get_port_private(port); | |
1712 | ||
1713 | if (mos7840_port == NULL) | |
1714 | return -ENODEV; | |
1715 | ||
1716 | mcr = mos7840_port->shadowMCR; | |
1717 | if (clear & TIOCM_RTS) | |
1718 | mcr &= ~MCR_RTS; | |
1719 | if (clear & TIOCM_DTR) | |
1720 | mcr &= ~MCR_DTR; | |
1721 | if (clear & TIOCM_LOOP) | |
1722 | mcr &= ~MCR_LOOPBACK; | |
1723 | ||
1724 | if (set & TIOCM_RTS) | |
1725 | mcr |= MCR_RTS; | |
1726 | if (set & TIOCM_DTR) | |
1727 | mcr |= MCR_DTR; | |
1728 | if (set & TIOCM_LOOP) | |
1729 | mcr |= MCR_LOOPBACK; | |
1730 | ||
1731 | mos7840_port->shadowMCR = mcr; | |
1732 | ||
1733 | status = 0; | |
1734 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); | |
1735 | if (status < 0) { | |
1736 | dbg("setting MODEM_CONTROL_REGISTER Failed\n"); | |
1737 | return -1; | |
1738 | } | |
1739 | ||
1740 | return 0; | |
1741 | } | |
1742 | ||
1743 | /***************************************************************************** | |
1744 | * mos7840_calc_baud_rate_divisor | |
1745 | * this function calculates the proper baud rate divisor for the specified | |
1746 | * baud rate. | |
1747 | *****************************************************************************/ | |
1748 | static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, | |
1749 | __u16 * clk_sel_val) | |
1750 | { | |
1751 | ||
1752 | dbg("%s - %d", __FUNCTION__, baudRate); | |
1753 | ||
1754 | if (baudRate <= 115200) { | |
1755 | *divisor = 115200 / baudRate; | |
1756 | *clk_sel_val = 0x0; | |
1757 | } | |
1758 | if ((baudRate > 115200) && (baudRate <= 230400)) { | |
1759 | *divisor = 230400 / baudRate; | |
1760 | *clk_sel_val = 0x10; | |
1761 | } else if ((baudRate > 230400) && (baudRate <= 403200)) { | |
1762 | *divisor = 403200 / baudRate; | |
1763 | *clk_sel_val = 0x20; | |
1764 | } else if ((baudRate > 403200) && (baudRate <= 460800)) { | |
1765 | *divisor = 460800 / baudRate; | |
1766 | *clk_sel_val = 0x30; | |
1767 | } else if ((baudRate > 460800) && (baudRate <= 806400)) { | |
1768 | *divisor = 806400 / baudRate; | |
1769 | *clk_sel_val = 0x40; | |
1770 | } else if ((baudRate > 806400) && (baudRate <= 921600)) { | |
1771 | *divisor = 921600 / baudRate; | |
1772 | *clk_sel_val = 0x50; | |
1773 | } else if ((baudRate > 921600) && (baudRate <= 1572864)) { | |
1774 | *divisor = 1572864 / baudRate; | |
1775 | *clk_sel_val = 0x60; | |
1776 | } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { | |
1777 | *divisor = 3145728 / baudRate; | |
1778 | *clk_sel_val = 0x70; | |
1779 | } | |
1780 | return 0; | |
1781 | ||
1782 | #ifdef NOTMCS7840 | |
1783 | ||
1784 | for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { | |
1785 | if (mos7840_divisor_table[i].BaudRate == baudrate) { | |
1786 | *divisor = mos7840_divisor_table[i].Divisor; | |
1787 | return 0; | |
1788 | } | |
1789 | } | |
1790 | ||
1791 | /* After trying for all the standard baud rates * | |
1792 | * Try calculating the divisor for this baud rate */ | |
1793 | ||
1794 | if (baudrate > 75 && baudrate < 230400) { | |
1795 | /* get the divisor */ | |
1796 | custom = (__u16) (230400L / baudrate); | |
1797 | ||
1798 | /* Check for round off */ | |
1799 | round1 = (__u16) (2304000L / baudrate); | |
1800 | round = (__u16) (round1 - (custom * 10)); | |
1801 | if (round > 4) { | |
1802 | custom++; | |
1803 | } | |
1804 | *divisor = custom; | |
1805 | ||
1806 | dbg(" Baud %d = %d\n", baudrate, custom); | |
1807 | return 0; | |
1808 | } | |
1809 | ||
1810 | dbg("%s\n", " Baud calculation Failed..."); | |
1811 | return -1; | |
1812 | #endif | |
1813 | } | |
1814 | ||
1815 | /***************************************************************************** | |
1816 | * mos7840_send_cmd_write_baud_rate | |
1817 | * this function sends the proper command to change the baud rate of the | |
1818 | * specified port. | |
1819 | *****************************************************************************/ | |
1820 | ||
1821 | static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, | |
1822 | int baudRate) | |
1823 | { | |
1824 | int divisor = 0; | |
1825 | int status; | |
1826 | __u16 Data; | |
1827 | unsigned char number; | |
1828 | __u16 clk_sel_val; | |
1829 | struct usb_serial_port *port; | |
1830 | ||
1831 | if (mos7840_port == NULL) | |
1832 | return -1; | |
1833 | ||
1834 | port = (struct usb_serial_port *)mos7840_port->port; | |
1835 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1836 | dbg("%s", "Invalid port \n"); | |
1837 | return -1; | |
1838 | } | |
1839 | ||
1840 | if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) { | |
1841 | dbg("%s", "Invalid Serial \n"); | |
1842 | return -1; | |
1843 | } | |
1844 | ||
1845 | dbg("%s", "Entering .......... \n"); | |
1846 | ||
1847 | number = mos7840_port->port->number - mos7840_port->port->serial->minor; | |
1848 | ||
1849 | dbg("%s - port = %d, baud = %d", __FUNCTION__, | |
1850 | mos7840_port->port->number, baudRate); | |
1851 | //reset clk_uart_sel in spregOffset | |
1852 | if (baudRate > 115200) { | |
1853 | #ifdef HW_flow_control | |
1854 | //NOTE: need to see the pther register to modify | |
1855 | //setting h/w flow control bit to 1; | |
1856 | status = 0; | |
1857 | Data = 0x2b; | |
1858 | mos7840_port->shadowMCR = Data; | |
1859 | status = | |
1860 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1861 | if (status < 0) { | |
1862 | dbg("Writing spreg failed in set_serial_baud\n"); | |
1863 | return -1; | |
1864 | } | |
1865 | #endif | |
1866 | ||
1867 | } else { | |
1868 | #ifdef HW_flow_control | |
1869 | //setting h/w flow control bit to 0; | |
1870 | status = 0; | |
1871 | Data = 0xb; | |
1872 | mos7840_port->shadowMCR = Data; | |
1873 | status = | |
1874 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
1875 | if (status < 0) { | |
1876 | dbg("Writing spreg failed in set_serial_baud\n"); | |
1877 | return -1; | |
1878 | } | |
1879 | #endif | |
1880 | ||
1881 | } | |
1882 | ||
1883 | if (1) //baudRate <= 115200) | |
1884 | { | |
1885 | clk_sel_val = 0x0; | |
1886 | Data = 0x0; | |
1887 | status = 0; | |
1888 | status = | |
1889 | mos7840_calc_baud_rate_divisor(baudRate, &divisor, | |
1890 | &clk_sel_val); | |
1891 | status = | |
1892 | mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, | |
1893 | &Data); | |
1894 | if (status < 0) { | |
1895 | dbg("reading spreg failed in set_serial_baud\n"); | |
1896 | return -1; | |
1897 | } | |
1898 | Data = (Data & 0x8f) | clk_sel_val; | |
1899 | status = 0; | |
1900 | status = | |
1901 | mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); | |
1902 | if (status < 0) { | |
1903 | dbg("Writing spreg failed in set_serial_baud\n"); | |
1904 | return -1; | |
1905 | } | |
1906 | /* Calculate the Divisor */ | |
1907 | ||
1908 | if (status) { | |
1909 | err("%s - bad baud rate", __FUNCTION__); | |
1910 | dbg("%s\n", "bad baud rate"); | |
1911 | return status; | |
1912 | } | |
1913 | /* Enable access to divisor latch */ | |
1914 | Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; | |
1915 | mos7840_port->shadowLCR = Data; | |
1916 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1917 | ||
1918 | /* Write the divisor */ | |
1919 | Data = (unsigned char)(divisor & 0xff); | |
1920 | dbg("set_serial_baud Value to write DLL is %x\n", Data); | |
1921 | mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); | |
1922 | ||
1923 | Data = (unsigned char)((divisor & 0xff00) >> 8); | |
1924 | dbg("set_serial_baud Value to write DLM is %x\n", Data); | |
1925 | mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); | |
1926 | ||
1927 | /* Disable access to divisor latch */ | |
1928 | Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; | |
1929 | mos7840_port->shadowLCR = Data; | |
1930 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
1931 | ||
1932 | } | |
1933 | ||
1934 | return status; | |
1935 | } | |
1936 | ||
1937 | /***************************************************************************** | |
1938 | * mos7840_change_port_settings | |
1939 | * This routine is called to set the UART on the device to match | |
1940 | * the specified new settings. | |
1941 | *****************************************************************************/ | |
1942 | ||
1943 | static void mos7840_change_port_settings(struct moschip_port *mos7840_port, | |
1944 | struct termios *old_termios) | |
1945 | { | |
1946 | struct tty_struct *tty; | |
1947 | int baud; | |
1948 | unsigned cflag; | |
1949 | unsigned iflag; | |
1950 | __u8 lData; | |
1951 | __u8 lParity; | |
1952 | __u8 lStop; | |
1953 | int status; | |
1954 | __u16 Data; | |
1955 | struct usb_serial_port *port; | |
1956 | struct usb_serial *serial; | |
1957 | ||
1958 | if (mos7840_port == NULL) | |
1959 | return; | |
1960 | ||
1961 | port = (struct usb_serial_port *)mos7840_port->port; | |
1962 | ||
1963 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
1964 | dbg("%s", "Invalid port \n"); | |
1965 | return; | |
1966 | } | |
1967 | ||
1968 | if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) { | |
1969 | dbg("%s", "Invalid Serial \n"); | |
1970 | return; | |
1971 | } | |
1972 | ||
1973 | serial = port->serial; | |
1974 | ||
1975 | dbg("%s - port %d", __FUNCTION__, mos7840_port->port->number); | |
1976 | ||
1977 | if (!mos7840_port->open) { | |
1978 | dbg("%s - port not opened", __FUNCTION__); | |
1979 | return; | |
1980 | } | |
1981 | ||
1982 | tty = mos7840_port->port->tty; | |
1983 | ||
1984 | if ((!tty) || (!tty->termios)) { | |
1985 | dbg("%s - no tty structures", __FUNCTION__); | |
1986 | return; | |
1987 | } | |
1988 | ||
1989 | dbg("%s", "Entering .......... \n"); | |
1990 | ||
1991 | lData = LCR_BITS_8; | |
1992 | lStop = LCR_STOP_1; | |
1993 | lParity = LCR_PAR_NONE; | |
1994 | ||
1995 | cflag = tty->termios->c_cflag; | |
1996 | iflag = tty->termios->c_iflag; | |
1997 | ||
1998 | /* Change the number of bits */ | |
1999 | if (cflag & CSIZE) { | |
2000 | switch (cflag & CSIZE) { | |
2001 | case CS5: | |
2002 | lData = LCR_BITS_5; | |
2003 | break; | |
2004 | ||
2005 | case CS6: | |
2006 | lData = LCR_BITS_6; | |
2007 | break; | |
2008 | ||
2009 | case CS7: | |
2010 | lData = LCR_BITS_7; | |
2011 | break; | |
2012 | default: | |
2013 | case CS8: | |
2014 | lData = LCR_BITS_8; | |
2015 | break; | |
2016 | } | |
2017 | } | |
2018 | /* Change the Parity bit */ | |
2019 | if (cflag & PARENB) { | |
2020 | if (cflag & PARODD) { | |
2021 | lParity = LCR_PAR_ODD; | |
2022 | dbg("%s - parity = odd", __FUNCTION__); | |
2023 | } else { | |
2024 | lParity = LCR_PAR_EVEN; | |
2025 | dbg("%s - parity = even", __FUNCTION__); | |
2026 | } | |
2027 | ||
2028 | } else { | |
2029 | dbg("%s - parity = none", __FUNCTION__); | |
2030 | } | |
2031 | ||
2032 | if (cflag & CMSPAR) { | |
2033 | lParity = lParity | 0x20; | |
2034 | } | |
2035 | ||
2036 | /* Change the Stop bit */ | |
2037 | if (cflag & CSTOPB) { | |
2038 | lStop = LCR_STOP_2; | |
2039 | dbg("%s - stop bits = 2", __FUNCTION__); | |
2040 | } else { | |
2041 | lStop = LCR_STOP_1; | |
2042 | dbg("%s - stop bits = 1", __FUNCTION__); | |
2043 | } | |
2044 | ||
2045 | /* Update the LCR with the correct value */ | |
2046 | mos7840_port->shadowLCR &= | |
2047 | ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
2048 | mos7840_port->shadowLCR |= (lData | lParity | lStop); | |
2049 | ||
2050 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n", | |
2051 | mos7840_port->shadowLCR); | |
2052 | /* Disable Interrupts */ | |
2053 | Data = 0x00; | |
2054 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2055 | ||
2056 | Data = 0x00; | |
2057 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
2058 | ||
2059 | Data = 0xcf; | |
2060 | mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); | |
2061 | ||
2062 | /* Send the updated LCR value to the mos7840 */ | |
2063 | Data = mos7840_port->shadowLCR; | |
2064 | ||
2065 | mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); | |
2066 | ||
2067 | Data = 0x00b; | |
2068 | mos7840_port->shadowMCR = Data; | |
2069 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2070 | Data = 0x00b; | |
2071 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2072 | ||
2073 | /* set up the MCR register and send it to the mos7840 */ | |
2074 | ||
2075 | mos7840_port->shadowMCR = MCR_MASTER_IE; | |
2076 | if (cflag & CBAUD) { | |
2077 | mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); | |
2078 | } | |
2079 | ||
2080 | if (cflag & CRTSCTS) { | |
2081 | mos7840_port->shadowMCR |= (MCR_XON_ANY); | |
2082 | ||
2083 | } else { | |
2084 | mos7840_port->shadowMCR &= ~(MCR_XON_ANY); | |
2085 | } | |
2086 | ||
2087 | Data = mos7840_port->shadowMCR; | |
2088 | mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2089 | ||
2090 | /* Determine divisor based on baud rate */ | |
2091 | baud = tty_get_baud_rate(tty); | |
2092 | ||
2093 | if (!baud) { | |
2094 | /* pick a default, any default... */ | |
2095 | dbg("%s\n", "Picked default baud..."); | |
2096 | baud = 9600; | |
2097 | } | |
2098 | ||
2099 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
2100 | status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); | |
2101 | ||
2102 | /* Enable Interrupts */ | |
2103 | Data = 0x0c; | |
2104 | mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); | |
2105 | ||
2106 | if (mos7840_port->read_urb->status != -EINPROGRESS) { | |
2107 | mos7840_port->read_urb->dev = serial->dev; | |
2108 | ||
2109 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); | |
2110 | ||
2111 | if (status) { | |
2112 | dbg(" usb_submit_urb(read bulk) failed, status = %d", | |
2113 | status); | |
2114 | } | |
2115 | } | |
2116 | wake_up(&mos7840_port->delta_msr_wait); | |
2117 | mos7840_port->delta_msr_cond = 1; | |
2118 | dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n", | |
2119 | mos7840_port->shadowLCR); | |
2120 | ||
2121 | return; | |
2122 | } | |
2123 | ||
2124 | /***************************************************************************** | |
2125 | * mos7840_set_termios | |
2126 | * this function is called by the tty driver when it wants to change | |
2127 | * the termios structure | |
2128 | *****************************************************************************/ | |
2129 | ||
2130 | static void mos7840_set_termios(struct usb_serial_port *port, | |
2131 | struct termios *old_termios) | |
2132 | { | |
2133 | int status; | |
2134 | unsigned int cflag; | |
2135 | struct usb_serial *serial; | |
2136 | struct moschip_port *mos7840_port; | |
2137 | struct tty_struct *tty; | |
2138 | dbg("mos7840_set_termios: START\n"); | |
2139 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
2140 | dbg("%s", "Invalid port \n"); | |
2141 | return; | |
2142 | } | |
2143 | ||
2144 | serial = port->serial; | |
2145 | ||
2146 | if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) { | |
2147 | dbg("%s", "Invalid Serial \n"); | |
2148 | return; | |
2149 | } | |
2150 | ||
2151 | mos7840_port = mos7840_get_port_private(port); | |
2152 | ||
2153 | if (mos7840_port == NULL) | |
2154 | return; | |
2155 | ||
2156 | tty = port->tty; | |
2157 | ||
2158 | if (!port->tty || !port->tty->termios) { | |
2159 | dbg("%s - no tty or termios", __FUNCTION__); | |
2160 | return; | |
2161 | } | |
2162 | ||
2163 | if (!mos7840_port->open) { | |
2164 | dbg("%s - port not opened", __FUNCTION__); | |
2165 | return; | |
2166 | } | |
2167 | ||
2168 | dbg("%s\n", "setting termios - "); | |
2169 | ||
2170 | cflag = tty->termios->c_cflag; | |
2171 | ||
2172 | if (!cflag) { | |
2173 | dbg("%s %s\n", __FUNCTION__, "cflag is NULL"); | |
2174 | return; | |
2175 | } | |
2176 | ||
2177 | /* check that they really want us to change something */ | |
2178 | if (old_termios) { | |
2179 | if ((cflag == old_termios->c_cflag) && | |
2180 | (RELEVANT_IFLAG(tty->termios->c_iflag) == | |
2181 | RELEVANT_IFLAG(old_termios->c_iflag))) { | |
2182 | dbg("%s\n", "Nothing to change"); | |
2183 | return; | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | dbg("%s - clfag %08x iflag %08x", __FUNCTION__, | |
2188 | tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); | |
2189 | ||
2190 | if (old_termios) { | |
2191 | dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, | |
2192 | old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); | |
2193 | } | |
2194 | ||
2195 | dbg("%s - port %d", __FUNCTION__, port->number); | |
2196 | ||
2197 | /* change the port settings to the new ones specified */ | |
2198 | ||
2199 | mos7840_change_port_settings(mos7840_port, old_termios); | |
2200 | ||
2201 | if (!mos7840_port->read_urb) { | |
2202 | dbg("%s", "URB KILLED !!!!!\n"); | |
2203 | return; | |
2204 | } | |
2205 | ||
2206 | if (mos7840_port->read_urb->status != -EINPROGRESS) { | |
2207 | mos7840_port->read_urb->dev = serial->dev; | |
2208 | status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); | |
2209 | if (status) { | |
2210 | dbg(" usb_submit_urb(read bulk) failed, status = %d", | |
2211 | status); | |
2212 | } | |
2213 | } | |
2214 | return; | |
2215 | } | |
2216 | ||
2217 | /***************************************************************************** | |
2218 | * mos7840_get_lsr_info - get line status register info | |
2219 | * | |
2220 | * Purpose: Let user call ioctl() to get info when the UART physically | |
2221 | * is emptied. On bus types like RS485, the transmitter must | |
2222 | * release the bus after transmitting. This must be done when | |
2223 | * the transmit shift register is empty, not be done when the | |
2224 | * transmit holding register is empty. This functionality | |
2225 | * allows an RS485 driver to be written in user space. | |
2226 | *****************************************************************************/ | |
2227 | ||
2228 | static int mos7840_get_lsr_info(struct moschip_port *mos7840_port, | |
2229 | unsigned int *value) | |
2230 | { | |
2231 | int count; | |
2232 | unsigned int result = 0; | |
2233 | ||
2234 | count = mos7840_chars_in_buffer(mos7840_port->port); | |
2235 | if (count == 0) { | |
2236 | dbg("%s -- Empty", __FUNCTION__); | |
2237 | result = TIOCSER_TEMT; | |
2238 | } | |
2239 | ||
2240 | if (copy_to_user(value, &result, sizeof(int))) | |
2241 | return -EFAULT; | |
2242 | return 0; | |
2243 | } | |
2244 | ||
2245 | /***************************************************************************** | |
2246 | * mos7840_get_bytes_avail - get number of bytes available | |
2247 | * | |
2248 | * Purpose: Let user call ioctl to get the count of number of bytes available. | |
2249 | *****************************************************************************/ | |
2250 | ||
2251 | static int mos7840_get_bytes_avail(struct moschip_port *mos7840_port, | |
2252 | unsigned int *value) | |
2253 | { | |
2254 | unsigned int result = 0; | |
2255 | struct tty_struct *tty = mos7840_port->port->tty; | |
2256 | ||
2257 | if (!tty) | |
2258 | return -ENOIOCTLCMD; | |
2259 | ||
2260 | result = tty->read_cnt; | |
2261 | ||
2262 | dbg("%s(%d) = %d", __FUNCTION__, mos7840_port->port->number, result); | |
2263 | if (copy_to_user(value, &result, sizeof(int))) | |
2264 | return -EFAULT; | |
2265 | ||
2266 | return -ENOIOCTLCMD; | |
2267 | } | |
2268 | ||
2269 | /***************************************************************************** | |
2270 | * mos7840_set_modem_info | |
2271 | * function to set modem info | |
2272 | *****************************************************************************/ | |
2273 | ||
2274 | static int mos7840_set_modem_info(struct moschip_port *mos7840_port, | |
2275 | unsigned int cmd, unsigned int *value) | |
2276 | { | |
2277 | unsigned int mcr; | |
2278 | unsigned int arg; | |
2279 | __u16 Data; | |
2280 | int status; | |
2281 | struct usb_serial_port *port; | |
2282 | ||
2283 | if (mos7840_port == NULL) | |
2284 | return -1; | |
2285 | ||
2286 | port = (struct usb_serial_port *)mos7840_port->port; | |
2287 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
2288 | dbg("%s", "Invalid port \n"); | |
2289 | return -1; | |
2290 | } | |
2291 | ||
2292 | mcr = mos7840_port->shadowMCR; | |
2293 | ||
2294 | if (copy_from_user(&arg, value, sizeof(int))) | |
2295 | return -EFAULT; | |
2296 | ||
2297 | switch (cmd) { | |
2298 | case TIOCMBIS: | |
2299 | if (arg & TIOCM_RTS) | |
2300 | mcr |= MCR_RTS; | |
2301 | if (arg & TIOCM_DTR) | |
2302 | mcr |= MCR_RTS; | |
2303 | if (arg & TIOCM_LOOP) | |
2304 | mcr |= MCR_LOOPBACK; | |
2305 | break; | |
2306 | ||
2307 | case TIOCMBIC: | |
2308 | if (arg & TIOCM_RTS) | |
2309 | mcr &= ~MCR_RTS; | |
2310 | if (arg & TIOCM_DTR) | |
2311 | mcr &= ~MCR_RTS; | |
2312 | if (arg & TIOCM_LOOP) | |
2313 | mcr &= ~MCR_LOOPBACK; | |
2314 | break; | |
2315 | ||
2316 | case TIOCMSET: | |
2317 | /* turn off the RTS and DTR and LOOPBACK | |
2318 | * and then only turn on what was asked to */ | |
2319 | mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); | |
2320 | mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); | |
2321 | mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); | |
2322 | mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); | |
2323 | break; | |
2324 | } | |
2325 | ||
2326 | mos7840_port->shadowMCR = mcr; | |
2327 | ||
2328 | Data = mos7840_port->shadowMCR; | |
2329 | status = 0; | |
2330 | status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); | |
2331 | if (status < 0) { | |
2332 | dbg("setting MODEM_CONTROL_REGISTER Failed\n"); | |
2333 | return -1; | |
2334 | } | |
2335 | ||
2336 | return 0; | |
2337 | } | |
2338 | ||
2339 | /***************************************************************************** | |
2340 | * mos7840_get_modem_info | |
2341 | * function to get modem info | |
2342 | *****************************************************************************/ | |
2343 | ||
2344 | static int mos7840_get_modem_info(struct moschip_port *mos7840_port, | |
2345 | unsigned int *value) | |
2346 | { | |
2347 | unsigned int result = 0; | |
2348 | __u16 msr; | |
2349 | unsigned int mcr = mos7840_port->shadowMCR; | |
2350 | int status = 0; | |
2351 | status = | |
2352 | mos7840_get_uart_reg(mos7840_port->port, MODEM_STATUS_REGISTER, | |
2353 | &msr); | |
2354 | result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ | |
2355 | |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ | |
2356 | |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ | |
2357 | |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ | |
2358 | |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ | |
2359 | |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ | |
2360 | ||
2361 | dbg("%s -- %x", __FUNCTION__, result); | |
2362 | ||
2363 | if (copy_to_user(value, &result, sizeof(int))) | |
2364 | return -EFAULT; | |
2365 | return 0; | |
2366 | } | |
2367 | ||
2368 | /***************************************************************************** | |
2369 | * mos7840_get_serial_info | |
2370 | * function to get information about serial port | |
2371 | *****************************************************************************/ | |
2372 | ||
2373 | static int mos7840_get_serial_info(struct moschip_port *mos7840_port, | |
2374 | struct serial_struct *retinfo) | |
2375 | { | |
2376 | struct serial_struct tmp; | |
2377 | ||
2378 | if (mos7840_port == NULL) | |
2379 | return -1; | |
2380 | ||
2381 | if (!retinfo) | |
2382 | return -EFAULT; | |
2383 | ||
2384 | memset(&tmp, 0, sizeof(tmp)); | |
2385 | ||
2386 | tmp.type = PORT_16550A; | |
2387 | tmp.line = mos7840_port->port->serial->minor; | |
2388 | tmp.port = mos7840_port->port->number; | |
2389 | tmp.irq = 0; | |
2390 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
2391 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
2392 | tmp.baud_base = 9600; | |
2393 | tmp.close_delay = 5 * HZ; | |
2394 | tmp.closing_wait = 30 * HZ; | |
2395 | ||
2396 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
2397 | return -EFAULT; | |
2398 | return 0; | |
2399 | } | |
2400 | ||
2401 | /***************************************************************************** | |
2402 | * SerialIoctl | |
2403 | * this function handles any ioctl calls to the driver | |
2404 | *****************************************************************************/ | |
2405 | ||
2406 | static int mos7840_ioctl(struct usb_serial_port *port, struct file *file, | |
2407 | unsigned int cmd, unsigned long arg) | |
2408 | { | |
2409 | struct moschip_port *mos7840_port; | |
2410 | struct tty_struct *tty; | |
2411 | ||
2412 | struct async_icount cnow; | |
2413 | struct async_icount cprev; | |
2414 | struct serial_icounter_struct icount; | |
2415 | int mosret = 0; | |
2416 | int retval; | |
2417 | struct tty_ldisc *ld; | |
2418 | ||
2419 | if (mos7840_port_paranoia_check(port, __FUNCTION__)) { | |
2420 | dbg("%s", "Invalid port \n"); | |
2421 | return -1; | |
2422 | } | |
2423 | ||
2424 | mos7840_port = mos7840_get_port_private(port); | |
2425 | tty = mos7840_port->port->tty; | |
2426 | ||
2427 | if (mos7840_port == NULL) | |
2428 | return -1; | |
2429 | ||
2430 | dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); | |
2431 | ||
2432 | switch (cmd) { | |
2433 | /* return number of bytes available */ | |
2434 | ||
2435 | case TIOCINQ: | |
2436 | dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); | |
2437 | return mos7840_get_bytes_avail(mos7840_port, | |
2438 | (unsigned int *)arg); | |
2439 | break; | |
2440 | ||
2441 | case TIOCOUTQ: | |
2442 | dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number); | |
2443 | return put_user(tty->driver->chars_in_buffer ? | |
2444 | tty->driver->chars_in_buffer(tty) : 0, | |
2445 | (int __user *)arg); | |
2446 | break; | |
2447 | ||
2448 | case TCFLSH: | |
2449 | retval = tty_check_change(tty); | |
2450 | if (retval) | |
2451 | return retval; | |
2452 | ||
2453 | ld = tty_ldisc_ref(tty); | |
2454 | switch (arg) { | |
2455 | case TCIFLUSH: | |
2456 | if (ld && ld->flush_buffer) | |
2457 | ld->flush_buffer(tty); | |
2458 | break; | |
2459 | case TCIOFLUSH: | |
2460 | if (ld && ld->flush_buffer) | |
2461 | ld->flush_buffer(tty); | |
2462 | /* fall through */ | |
2463 | case TCOFLUSH: | |
2464 | if (tty->driver->flush_buffer) | |
2465 | tty->driver->flush_buffer(tty); | |
2466 | break; | |
2467 | default: | |
2468 | tty_ldisc_deref(ld); | |
2469 | return -EINVAL; | |
2470 | } | |
2471 | tty_ldisc_deref(ld); | |
2472 | return 0; | |
2473 | ||
2474 | case TCGETS: | |
2475 | if (kernel_termios_to_user_termios | |
2476 | ((struct termios __user *)arg, tty->termios)) | |
2477 | return -EFAULT; | |
2478 | return 0; | |
2479 | ||
2480 | case TIOCSERGETLSR: | |
2481 | dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); | |
2482 | return mos7840_get_lsr_info(mos7840_port, (unsigned int *)arg); | |
2483 | return 0; | |
2484 | ||
2485 | case TIOCMBIS: | |
2486 | case TIOCMBIC: | |
2487 | case TIOCMSET: | |
2488 | dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, | |
2489 | port->number); | |
2490 | mosret = | |
2491 | mos7840_set_modem_info(mos7840_port, cmd, | |
2492 | (unsigned int *)arg); | |
2493 | return mosret; | |
2494 | ||
2495 | case TIOCMGET: | |
2496 | dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); | |
2497 | return mos7840_get_modem_info(mos7840_port, | |
2498 | (unsigned int *)arg); | |
2499 | ||
2500 | case TIOCGSERIAL: | |
2501 | dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); | |
2502 | return mos7840_get_serial_info(mos7840_port, | |
2503 | (struct serial_struct *)arg); | |
2504 | ||
2505 | case TIOCSSERIAL: | |
2506 | dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); | |
2507 | break; | |
2508 | ||
2509 | case TIOCMIWAIT: | |
2510 | dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); | |
2511 | cprev = mos7840_port->icount; | |
2512 | while (1) { | |
2513 | //interruptible_sleep_on(&mos7840_port->delta_msr_wait); | |
2514 | mos7840_port->delta_msr_cond = 0; | |
2515 | wait_event_interruptible(mos7840_port->delta_msr_wait, | |
2516 | (mos7840_port-> | |
2517 | delta_msr_cond == 1)); | |
2518 | ||
2519 | /* see if a signal did it */ | |
2520 | if (signal_pending(current)) | |
2521 | return -ERESTARTSYS; | |
2522 | cnow = mos7840_port->icount; | |
2523 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
2524 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
2525 | return -EIO; /* no change => error */ | |
2526 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
2527 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
2528 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
2529 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { | |
2530 | return 0; | |
2531 | } | |
2532 | cprev = cnow; | |
2533 | } | |
2534 | /* NOTREACHED */ | |
2535 | break; | |
2536 | ||
2537 | case TIOCGICOUNT: | |
2538 | cnow = mos7840_port->icount; | |
2539 | icount.cts = cnow.cts; | |
2540 | icount.dsr = cnow.dsr; | |
2541 | icount.rng = cnow.rng; | |
2542 | icount.dcd = cnow.dcd; | |
2543 | icount.rx = cnow.rx; | |
2544 | icount.tx = cnow.tx; | |
2545 | icount.frame = cnow.frame; | |
2546 | icount.overrun = cnow.overrun; | |
2547 | icount.parity = cnow.parity; | |
2548 | icount.brk = cnow.brk; | |
2549 | icount.buf_overrun = cnow.buf_overrun; | |
2550 | ||
2551 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, | |
2552 | port->number, icount.rx, icount.tx); | |
2553 | if (copy_to_user((void *)arg, &icount, sizeof(icount))) | |
2554 | return -EFAULT; | |
2555 | return 0; | |
2556 | ||
2557 | case TIOCEXBAUD: | |
2558 | return 0; | |
2559 | default: | |
2560 | break; | |
2561 | } | |
2562 | ||
2563 | return -ENOIOCTLCMD; | |
2564 | } | |
2565 | ||
2566 | static int mos7840_calc_num_ports(struct usb_serial *serial) | |
2567 | { | |
2568 | ||
2569 | dbg("numberofendpoints: %d \n", | |
2570 | (int)serial->interface->cur_altsetting->desc.bNumEndpoints); | |
2571 | dbg("numberofendpoints: %d \n", | |
2572 | (int)serial->interface->altsetting->desc.bNumEndpoints); | |
2573 | if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { | |
2574 | mos7840_num_ports = 2; | |
2575 | serial->type->num_ports = 2; | |
2576 | } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { | |
2577 | mos7840_num_ports = 4; | |
2578 | serial->type->num_bulk_in = 4; | |
2579 | serial->type->num_bulk_out = 4; | |
2580 | serial->type->num_ports = 4; | |
2581 | } | |
2582 | ||
2583 | return mos7840_num_ports; | |
2584 | } | |
2585 | ||
2586 | /**************************************************************************** | |
2587 | * mos7840_startup | |
2588 | ****************************************************************************/ | |
2589 | ||
2590 | static int mos7840_startup(struct usb_serial *serial) | |
2591 | { | |
2592 | struct moschip_port *mos7840_port; | |
2593 | struct usb_device *dev; | |
2594 | int i, status; | |
2595 | ||
2596 | __u16 Data; | |
2597 | dbg("%s \n", " mos7840_startup :entering.........."); | |
2598 | ||
2599 | if (!serial) { | |
2600 | dbg("%s\n", "Invalid Handler"); | |
2601 | return -1; | |
2602 | } | |
2603 | ||
2604 | dev = serial->dev; | |
2605 | ||
2606 | dbg("%s\n", "Entering..."); | |
2607 | ||
2608 | /* we set up the pointers to the endpoints in the mos7840_open * | |
2609 | * function, as the structures aren't created yet. */ | |
2610 | ||
2611 | /* set up port private structures */ | |
2612 | for (i = 0; i < serial->num_ports; ++i) { | |
2613 | mos7840_port = kmalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
2614 | if (mos7840_port == NULL) { | |
2615 | err("%s - Out of memory", __FUNCTION__); | |
2616 | return -ENOMEM; | |
2617 | } | |
2618 | memset(mos7840_port, 0, sizeof(struct moschip_port)); | |
2619 | ||
2620 | /* Initialize all port interrupt end point to port 0 int endpoint * | |
2621 | * Our device has only one interrupt end point comman to all port */ | |
2622 | ||
2623 | mos7840_port->port = serial->port[i]; | |
2624 | mos7840_set_port_private(serial->port[i], mos7840_port); | |
2625 | ||
2626 | mos7840_port->port_num = ((serial->port[i]->number - | |
2627 | (serial->port[i]->serial->minor)) + | |
2628 | 1); | |
2629 | ||
2630 | if (mos7840_port->port_num == 1) { | |
2631 | mos7840_port->SpRegOffset = 0x0; | |
2632 | mos7840_port->ControlRegOffset = 0x1; | |
2633 | mos7840_port->DcrRegOffset = 0x4; | |
2634 | } else if ((mos7840_port->port_num == 2) | |
2635 | && (mos7840_num_ports == 4)) { | |
2636 | mos7840_port->SpRegOffset = 0x8; | |
2637 | mos7840_port->ControlRegOffset = 0x9; | |
2638 | mos7840_port->DcrRegOffset = 0x16; | |
2639 | } else if ((mos7840_port->port_num == 2) | |
2640 | && (mos7840_num_ports == 2)) { | |
2641 | mos7840_port->SpRegOffset = 0xa; | |
2642 | mos7840_port->ControlRegOffset = 0xb; | |
2643 | mos7840_port->DcrRegOffset = 0x19; | |
2644 | } else if ((mos7840_port->port_num == 3) | |
2645 | && (mos7840_num_ports == 4)) { | |
2646 | mos7840_port->SpRegOffset = 0xa; | |
2647 | mos7840_port->ControlRegOffset = 0xb; | |
2648 | mos7840_port->DcrRegOffset = 0x19; | |
2649 | } else if ((mos7840_port->port_num == 4) | |
2650 | && (mos7840_num_ports == 4)) { | |
2651 | mos7840_port->SpRegOffset = 0xc; | |
2652 | mos7840_port->ControlRegOffset = 0xd; | |
2653 | mos7840_port->DcrRegOffset = 0x1c; | |
2654 | } | |
2655 | mos7840_dump_serial_port(mos7840_port); | |
2656 | ||
2657 | mos7840_set_port_private(serial->port[i], mos7840_port); | |
2658 | ||
2659 | //enable rx_disable bit in control register | |
2660 | ||
2661 | status = | |
2662 | mos7840_get_reg_sync(serial->port[i], | |
2663 | mos7840_port->ControlRegOffset, &Data); | |
2664 | if (status < 0) { | |
2665 | dbg("Reading ControlReg failed status-0x%x\n", status); | |
2666 | break; | |
2667 | } else | |
2668 | dbg("ControlReg Reading success val is %x, status%d\n", | |
2669 | Data, status); | |
2670 | Data |= 0x08; //setting driver done bit | |
2671 | Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg | |
2672 | ||
2673 | //Data |= 0x20; //rx_disable bit | |
2674 | status = 0; | |
2675 | status = | |
2676 | mos7840_set_reg_sync(serial->port[i], | |
2677 | mos7840_port->ControlRegOffset, Data); | |
2678 | if (status < 0) { | |
2679 | dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); | |
2680 | break; | |
2681 | } else | |
2682 | dbg("ControlReg Writing success(rx_disable) status%d\n", | |
2683 | status); | |
2684 | ||
2685 | //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3 | |
2686 | Data = 0x01; | |
2687 | status = 0; | |
2688 | status = | |
2689 | mos7840_set_reg_sync(serial->port[i], | |
2690 | (__u16) (mos7840_port->DcrRegOffset + | |
2691 | 0), Data); | |
2692 | if (status < 0) { | |
2693 | dbg("Writing DCR0 failed status-0x%x\n", status); | |
2694 | break; | |
2695 | } else | |
2696 | dbg("DCR0 Writing success status%d\n", status); | |
2697 | ||
2698 | Data = 0x05; | |
2699 | status = 0; | |
2700 | status = | |
2701 | mos7840_set_reg_sync(serial->port[i], | |
2702 | (__u16) (mos7840_port->DcrRegOffset + | |
2703 | 1), Data); | |
2704 | if (status < 0) { | |
2705 | dbg("Writing DCR1 failed status-0x%x\n", status); | |
2706 | break; | |
2707 | } else | |
2708 | dbg("DCR1 Writing success status%d\n", status); | |
2709 | ||
2710 | Data = 0x24; | |
2711 | status = 0; | |
2712 | status = | |
2713 | mos7840_set_reg_sync(serial->port[i], | |
2714 | (__u16) (mos7840_port->DcrRegOffset + | |
2715 | 2), Data); | |
2716 | if (status < 0) { | |
2717 | dbg("Writing DCR2 failed status-0x%x\n", status); | |
2718 | break; | |
2719 | } else | |
2720 | dbg("DCR2 Writing success status%d\n", status); | |
2721 | ||
2722 | // write values in clkstart0x0 and clkmulti 0x20 | |
2723 | Data = 0x0; | |
2724 | status = 0; | |
2725 | status = | |
2726 | mos7840_set_reg_sync(serial->port[i], | |
2727 | CLK_START_VALUE_REGISTER, Data); | |
2728 | if (status < 0) { | |
2729 | dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); | |
2730 | break; | |
2731 | } else | |
2732 | dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); | |
2733 | ||
2734 | Data = 0x20; | |
2735 | status = 0; | |
2736 | status = | |
2737 | mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER, | |
2738 | Data); | |
2739 | if (status < 0) { | |
2740 | dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", | |
2741 | status); | |
2742 | break; | |
2743 | } else | |
2744 | dbg("CLK_MULTI_REGISTER Writing success status%d\n", | |
2745 | status); | |
2746 | ||
2747 | //write value 0x0 to scratchpad register | |
2748 | Data = 0x00; | |
2749 | status = 0; | |
2750 | status = | |
2751 | mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER, | |
2752 | Data); | |
2753 | if (status < 0) { | |
2754 | dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", | |
2755 | status); | |
2756 | break; | |
2757 | } else | |
2758 | dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", | |
2759 | status); | |
2760 | ||
2761 | //Zero Length flag register | |
2762 | if ((mos7840_port->port_num != 1) | |
2763 | && (mos7840_num_ports == 2)) { | |
2764 | ||
2765 | Data = 0xff; | |
2766 | status = 0; | |
2767 | status = mos7840_set_reg_sync(serial->port[i], | |
2768 | (__u16) (ZLP_REG1 + | |
2769 | ((__u16) | |
2770 | mos7840_port-> | |
2771 | port_num)), | |
2772 | Data); | |
2773 | dbg("ZLIP offset%x\n", | |
2774 | (__u16) (ZLP_REG1 + | |
2775 | ((__u16) mos7840_port->port_num))); | |
2776 | if (status < 0) { | |
2777 | dbg("Writing ZLP_REG%d failed status-0x%x\n", | |
2778 | i + 2, status); | |
2779 | break; | |
2780 | } else | |
2781 | dbg("ZLP_REG%d Writing success status%d\n", | |
2782 | i + 2, status); | |
2783 | } else { | |
2784 | Data = 0xff; | |
2785 | status = 0; | |
2786 | status = mos7840_set_reg_sync(serial->port[i], | |
2787 | (__u16) (ZLP_REG1 + | |
2788 | ((__u16) | |
2789 | mos7840_port-> | |
2790 | port_num) - | |
2791 | 0x1), Data); | |
2792 | dbg("ZLIP offset%x\n", | |
2793 | (__u16) (ZLP_REG1 + | |
2794 | ((__u16) mos7840_port->port_num) - 0x1)); | |
2795 | if (status < 0) { | |
2796 | dbg("Writing ZLP_REG%d failed status-0x%x\n", | |
2797 | i + 1, status); | |
2798 | break; | |
2799 | } else | |
2800 | dbg("ZLP_REG%d Writing success status%d\n", | |
2801 | i + 1, status); | |
2802 | ||
2803 | } | |
2804 | mos7840_port->control_urb = usb_alloc_urb(0, SLAB_ATOMIC); | |
2805 | mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); | |
2806 | ||
2807 | } | |
2808 | ||
2809 | //Zero Length flag enable | |
2810 | Data = 0x0f; | |
2811 | status = 0; | |
2812 | status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); | |
2813 | if (status < 0) { | |
2814 | dbg("Writing ZLP_REG5 failed status-0x%x\n", status); | |
2815 | return -1; | |
2816 | } else | |
2817 | dbg("ZLP_REG5 Writing success status%d\n", status); | |
2818 | ||
2819 | /* setting configuration feature to one */ | |
2820 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
2821 | (__u8) 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 5 * HZ); | |
2822 | return 0; | |
2823 | } | |
2824 | ||
2825 | /**************************************************************************** | |
2826 | * mos7840_shutdown | |
2827 | * This function is called whenever the device is removed from the usb bus. | |
2828 | ****************************************************************************/ | |
2829 | ||
2830 | static void mos7840_shutdown(struct usb_serial *serial) | |
2831 | { | |
2832 | int i; | |
2833 | struct moschip_port *mos7840_port; | |
2834 | dbg("%s \n", " shutdown :entering.........."); | |
2835 | ||
2836 | if (!serial) { | |
2837 | dbg("%s", "Invalid Handler \n"); | |
2838 | return; | |
2839 | } | |
2840 | ||
2841 | /* check for the ports to be closed,close the ports and disconnect */ | |
2842 | ||
2843 | /* free private structure allocated for serial port * | |
2844 | * stop reads and writes on all ports */ | |
2845 | ||
2846 | for (i = 0; i < serial->num_ports; ++i) { | |
2847 | mos7840_port = mos7840_get_port_private(serial->port[i]); | |
2848 | kfree(mos7840_port->ctrl_buf); | |
2849 | usb_kill_urb(mos7840_port->control_urb); | |
2850 | kfree(mos7840_port); | |
2851 | mos7840_set_port_private(serial->port[i], NULL); | |
2852 | } | |
2853 | ||
2854 | dbg("%s\n", "Thank u :: "); | |
2855 | ||
2856 | } | |
2857 | ||
2858 | static struct usb_serial_driver moschip7840_4port_device = { | |
2859 | .driver = { | |
2860 | .owner = THIS_MODULE, | |
2861 | .name = "mos7840", | |
2862 | }, | |
2863 | .description = DRIVER_DESC, | |
2864 | .id_table = moschip_port_id_table, | |
2865 | .num_interrupt_in = 1, //NUM_DONT_CARE,//1, | |
2866 | #ifdef check | |
2867 | .num_bulk_in = 4, | |
2868 | .num_bulk_out = 4, | |
2869 | .num_ports = 4, | |
2870 | #endif | |
2871 | .open = mos7840_open, | |
2872 | .close = mos7840_close, | |
2873 | .write = mos7840_write, | |
2874 | .write_room = mos7840_write_room, | |
2875 | .chars_in_buffer = mos7840_chars_in_buffer, | |
2876 | .throttle = mos7840_throttle, | |
2877 | .unthrottle = mos7840_unthrottle, | |
2878 | .calc_num_ports = mos7840_calc_num_ports, | |
2879 | #ifdef MCSSerialProbe | |
2880 | .probe = mos7840_serial_probe, | |
2881 | #endif | |
2882 | .ioctl = mos7840_ioctl, | |
2883 | .set_termios = mos7840_set_termios, | |
2884 | .break_ctl = mos7840_break, | |
2885 | .tiocmget = mos7840_tiocmget, | |
2886 | .tiocmset = mos7840_tiocmset, | |
2887 | .attach = mos7840_startup, | |
2888 | .shutdown = mos7840_shutdown, | |
2889 | .read_bulk_callback = mos7840_bulk_in_callback, | |
2890 | .read_int_callback = mos7840_interrupt_callback, | |
2891 | }; | |
2892 | ||
2893 | static struct usb_driver io_driver = { | |
2894 | .name = "mos7840", | |
2895 | .probe = usb_serial_probe, | |
2896 | .disconnect = usb_serial_disconnect, | |
2897 | .id_table = moschip_id_table_combined, | |
2898 | }; | |
2899 | ||
2900 | /**************************************************************************** | |
2901 | * moschip7840_init | |
2902 | * This is called by the module subsystem, or on startup to initialize us | |
2903 | ****************************************************************************/ | |
2904 | static int __init moschip7840_init(void) | |
2905 | { | |
2906 | int retval; | |
2907 | ||
2908 | dbg("%s \n", " mos7840_init :entering.........."); | |
2909 | ||
2910 | /* Register with the usb serial */ | |
2911 | retval = usb_serial_register(&moschip7840_4port_device); | |
2912 | ||
2913 | if (retval) | |
2914 | goto failed_port_device_register; | |
2915 | ||
2916 | dbg("%s\n", "Entring..."); | |
2917 | info(DRIVER_DESC " " DRIVER_VERSION); | |
2918 | ||
2919 | /* Register with the usb */ | |
2920 | retval = usb_register(&io_driver); | |
2921 | ||
2922 | if (retval) | |
2923 | goto failed_usb_register; | |
2924 | ||
2925 | if (retval == 0) { | |
2926 | dbg("%s\n", "Leaving..."); | |
2927 | return 0; | |
2928 | } | |
2929 | ||
2930 | failed_usb_register: | |
2931 | usb_serial_deregister(&moschip7840_4port_device); | |
2932 | ||
2933 | failed_port_device_register: | |
2934 | ||
2935 | return retval; | |
2936 | } | |
2937 | ||
2938 | /**************************************************************************** | |
2939 | * moschip7840_exit | |
2940 | * Called when the driver is about to be unloaded. | |
2941 | ****************************************************************************/ | |
2942 | static void __exit moschip7840_exit(void) | |
2943 | { | |
2944 | ||
2945 | dbg("%s \n", " mos7840_exit :entering.........."); | |
2946 | ||
2947 | usb_deregister(&io_driver); | |
2948 | ||
2949 | usb_serial_deregister(&moschip7840_4port_device); | |
2950 | ||
2951 | dbg("%s\n", "Entring..."); | |
2952 | } | |
2953 | ||
2954 | module_init(moschip7840_init); | |
2955 | module_exit(moschip7840_exit); | |
2956 | ||
2957 | /* Module information */ | |
2958 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2959 | MODULE_LICENSE("GPL"); | |
2960 | ||
2961 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
2962 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |